Specifications

ManualsBrandsSimplicity ManualsLawn Mower1600408

T.M. No. 888-2339-002

TECHNICAL MANUAL

888-2339-002

DX100-3F

994-9369-103

Summary of content (338 pages)

PAGE 1
TECHNICAL MANUAL 888-2339-002 DX100-3F 994-9369-103 T.M. No.
PAGE 2
Returns And Exchanges Damaged or undamaged equipment should not be returned unless written approval and a Return Authorization is received from HARRIS CORPORATION, Broadcast Communications Division. Special shipping instructions and coding will be provided to assure proper handling. Complete details regarding circumstances and reasons for return are to be included in the request for return. Custom equipment or special order equipment, that is not defective, is not returnable.
PAGE 3
WARNING THE CURRENTS AND VOLTAGES IN THIS EQUIPMENT ARE DANGEROUS. PERSONNEL MUST AT ALL TIMES OBSERVE SAFETY WARNINGS, INSTRUCTIONS AND REGULATIONS. This manual is intended as a general guide for trained and qualified personnel who are aware of the dangers inherent in handling potentially hazardous electrical/electronic circuits. It is not intended to contain a complete statement of all safety precautions which should be observed by personnel in using this or other electronic equipment.
PAGE 4
i 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 5
FIRST-AID Personnel engaged in the installation, operation, maintenance or servicing of this equipment are urged to become familiar with first-aid theory and practices. The following information is not intended to be complete first-aid procedures, it is a brief and is only to be used as a reference. It is the duty of all personnel using the equipment to be prepared to give adequate Emergency First Aid and thereby prevent avoidable loss of life. Treatment of Electrical Burns 1.
PAGE 6
TABLE OF CONTENTS Section I Introduction/Specifications Scope and Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Available Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2 1-2 1-2 2-1 2-1 2-1 2-1 2-2 2-2 2-2 Section III Operators Guide Introduction . . . . . . . . . . . . . . . . . . .
PAGE 7
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Diagram Description . . . . . . . . . . . . . . . . . . . . . . . . . Detailed Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . Alignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 8
Section R Frequency Control Interface Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R-1 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R-1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R-1 Block Diagram Description . . . . . . . . . . . . . . . . . . . . . . . . R-1 Detailed Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . R-2 Troubleshooting . . . . . . . . . . . .
PAGE 9
Section I Introduction/Specifications 1.1 Scope and Purpose Control Multimeter (A41) This technical manual contains the information necessary to install and maintain the DX100-3F. The various sections of this technical manual provide the following types of information. • Section I, Introduction/Specifications, provides general • • • • manual layout, frontispiece, equipment description, block diagram, and available options. Section II, Installation/Initial Turn-On, provides initial turn on instructions.
PAGE 10
• Section G, RF Amplifiers • Section H, Output Monitor (A21) • • • • • • • • • 1-2 Output Sample (2A1) VSWR Compensation (A56) Section J, Analog Input Board (A22) Section K, Analog To Digital Converter (A32) Section L, Modulation Encoders Big Step Modulation Encoders (A26-A29) Binary Modulation Encoder (A25) Air Flow Monitors (A3, A24, A47-A49) Section M, Controller (A31) LED Board (A42) Switch Board/Meter Panel (A35) Section N, External Interface (A23) Section P, Transmitter Interface (A30) Section Q,
PAGE 11
Figure 1-2. DX100-3F Block Diagram 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 12
1-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 13
Section II Initial Turn-On The following procedure assumes that the transmitter has already been correctly installed and is ready for turn-on. Note If AC power is loss for an extended period of time and the Battery Backup Voltage falls too low to store the Frequency references, you will need follow the procedure under “Initial Power On”. If AC loss for an extended period of time happens often you may want to provide an external battery backup via TB1 1-2 on the Transmitter Interface. Refer to P.4.3.1.
PAGE 14
If an Antenna VSWR overload occurs before 50 kW is reached, skip to the Antenna Null adjustment following this section and return here when completed. 2.5 High Power Tune a. Depress the High Power switch on the front panel. b. Adjust R65 clockwise until 100 kW is reached. c. Using the front panel meters, verify the following conditions: 1. PA +VDC = 225 to 235 volts. 2. PA Current = 460 to 470 amps. 3.
PAGE 15
Section III Operators Guide 3.1 Introduction This section contains information on day-to-day operation for the non-technical operator. 3.2 Operating Procedures These procedures describe normal daily operation of the DX1003F, including: a. Daily pre-operational checkout b. Transmitter turn-on procedures. c. Transmitter turn-off procedures. d. Transmitter operations. It is important that the operator be aware of normal transmitter operation and performance, and note any changes or fault indications.
PAGE 16
NOTE RAISE and LOWER buttons will only change power level if the transmitter is operating in the HIGH, MEDIUM, or LOW function. This new power level will become the preset power until it is changed again. The Raise and Lower pushbuttons will adjust power +/-10% of the selected power level. f. Check transmitter panel meter readings for normal values. If an abnormal meter reading is obtained, maintenance personnel should be contacted. 3.5 Transmitter Turn-Off Procedure a.
PAGE 17
b. The indicators may flash RED when overmodulation occurs. Reducing modulation to normal levels may correct the condition. c. If the indicators remain RED and weather conditions or overmodulation are not the cause, transmitter and/or antenna problems are indicated. 3.6.2.7 Air Flow Faults If the AIR FLOW REDUCED indicator is RED, the following may be the cause: a. Obstruction of air flow at the air intake on the transmitter rear doors or at the air outlet on the transmitter top. b.
PAGE 18
3-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 19
Section IIIA Controls and Indicators REF. 1 2 3 4 5 6 7 8 9 CONTROL/INDICATOR Frequency Control Panel Switch Board/Meter Panel Control Front Panel Power Supply Status Panel Output Network Cabinet Left PA Cabinet Center PA Cabinet Right PA Cabinet Power Supply Cabinet FUNCTION See Table 3-1 and Figure 3-1. See Table 3-2 and Figure 3-2. See Table 3-3 and Figure 3-3. See Table 3-4 and Figure 3-4. 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 20
Figure 3-1 Frequency Control Panel Controls and Indicators 3A-2 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 21
Table 3-1. Frequency Control Panel Controls and Indicators REF. 1 2 3 4 5 6 7 8 9 10 11 12 CONTROL/INDICATOR FUNCTION FREQUENCY SYNTHESIZER LED GREEN indicates desired frequency is acceptable. RED indicates desired frequency is out of range. TUNE POSITION NOTE - The following assumes S2 on the Frequency Control board is in the METER/FREQUENCY CONTROL NORMAL position. When in the FREQUENCY CHANGE Mode, the meter BOARD MULTIMETER indicates the proper position for the TUNE SERVO.
PAGE 22
Figure 3-2. Switch Board/Meter Panel Controls and Indicators 3A-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 23
Table 3-2 Switchboard/Meter Panel Controls and Indicators REF. 1 2 3 CONTROL/INDICATOR VOLTAGE multimeter SUPPLY CURRENT meter POWER meter 4 POWER, selector 5 6 OFF, pushbutton LOWER, pushbutton 7 RAISE, pushbutton 8 HIGH, pushbutton 9 MEDIUM, pushbutton 10 LOW, pushbutton 11 MULTIMETER switch FUNCTION Indicates voltages at points selected by the Multimeter Switch (Ref. 11). Indicates the 230V supply current being supplied to the Power Amplifier.
PAGE 24
Figure 3-3 Control Front Panel Controls and Indicators Table 3-3 Control Front Panel Controls and Indicators CONTROL/INDICATOR FREQUENCY SYNTHESIZER BUFFER AMP PREDRIVER DRIVER HIGH DRIVE LOW DRIVE RF AMP FUSE TEMP OUTPUT MONITOR NETWORK VSWR ANTENNA VSWR VSWR TEST, pushbutton VSWR TEST indicator SUPPLY FAULT 3A-6 FUNCTION Indicates Frequency Synthesizer board rf output status. GREEN indicates normal rf output; RED indicates low or no rf output. Indicates buffer amplifier rf output status.
PAGE 25
Table 3-3 Control Front Panel Controls and Indicators (Continued) CONTROL/INDICATOR ANALOG INPUT POWER FOLDBACK FUNCTION GREEN indicates normal operation. RED indicates transmitter has responded to a fault by reducing current power level. GREEN indicates normal operation. RED indicates a power supply failure.
PAGE 26
Figure 3-4 Power Supply Status Panel Cotrols and Indicators Table 3-4 Power Supply Status Panel Cotrols and Indicators CONTROL/INDICATOR FUNCTION RF AMPLIFIER POWER SUPPLIES 3PH A/C MAINS PROTECTION ACTIVE PH1 GREEN indicates protection active. No illumination indicates failed protection or loss of phase at input. PH2 GREEN indicates protection active. No illumination indicates failed protection or loss of phase at input. PH3 GREEN indicates protection active.
PAGE 27
Table 3-4 (Continued) CONTROL/INDICATOR PH2 MAIN BREAKER UP DOWN CONTROLLER BREAKER UP DOWN ENABLE SWITCH NORMAL STANDBY LOW VOLTAGE BREAKER UP DOWN SERVO UP DOWN FUNCTION GREEN indicates protection active. No illumination indicates failed protection or loss of phase at input.
PAGE 28
Figure 3-5 Table 3-5 CONTROL MULTIMETER POSITION PROBE PK AC PROBE +VDC PROBE +VDC PROBE -VDC +/-22VDC +/-8VDC B+/B-VDC +12VDC A/D IN +VDC A/D OUT +VDC B- DRIVE -VDC 3A-10 FUNCTION Probe will measure peak alternating current voltages 0 to 30 Vac Probe will measure direct current voltages 0 to +3 Vdc Probe will measure direct current voltages 0 to +30 Vdc Probe will measure direct current voltages 0 to -30 Vdc Normally measures the +22 Vdc power supply voltages 0 to +30 Vdc.
PAGE 29
Figure 3-6 Table 3-6 DRIVER MULTIMETER POSITION PROBE PK AC PROBE +VDC PROBE +VDC PROBE -VDC PREDRIVER IDC PREDRIVER +VDC CONTROL +VDC DRIVER +VDC DRIVER IDC DRIVER 14A +VDC DRIVER 14B +VDC FUNCTION Probe will measure peak AC voltages 0 to 30 Vac Probe will measure positive direct current voltages 0 to +3 Vdc Probe will measure positive direct current voltages 0 to +30 Vdc Probe will measure negative direct currrent voltages 0 to -30 Vdc Measures Predriver current 0 to +10 A Measures Predriver voltage 0
PAGE 30
Figure 3-7 Table 3-7 FREQUENCY CONTROL POSITION -20 +20 +24 +15V +5V -5V EXT(TP11) SYNTH SYNC BUFFER PREDRIVER DRIVER 3A-12 MULTIMETER FUNCTION Measures transmitter -20Vdc power supply Measures transmitter +20Vdc power supply Measures transmitter +24Vdc power supply Measures Frequency Control board +15Vdc power supply Measures Frequency Control board +15Vdc power supply Measures Frequency Control board +15Vdc power supply Measures any voltage connected to TP11 Measures relative phase difference between
PAGE 31
DX100-3F ROUTINE METER READINGS DATE TEST CONDITIONS: MODULATION: FREQUENCY POWER LEVEL FRONT PANEL METERS FORWARD POWER REFLECTED POWER PA CURRENT FRONT PANEL MULTIMETER PA VOLTS NETWORK NULL ANTENNA NULL RF DRIVE FREQUENCY CONTROL METERS TUNE SERVO LOAD SERVO -10 +20 +24 +15V +5V -5V EXT (TP11) SYNTH SYNC BUFFER PREDRIVER DRIVER CONTROL MULTIMETER -22V +22V -8V +8V B+ B+12V A/D INPUT A/D OUTPUT B- DRIVE DRIVER MULTIMETER PREDRIVER CURRENT PREDRIVER VOLTAGE BUFFER VOLTAGE DRIVER SUPPLY VOLTS DRIVER SUPPLY
PAGE 32
3A-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 33
Section IV Overall System Theory 4.1 Introduction This section of the maintenance manual will present the overall principles of operation for the transmitter, including a description of circuits not included on circuit boards described in sections A through R of this Technical Manual.
PAGE 34
Figure 4-1. Overall Block Diagram 4-2 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 35
basic sections, the Bandpass Filter stage and the Output Matching stage. 4.2.1.14 Output Monitor The Output Monitor detects any high VSWR condition in the Output Network and/or Antenna. If the VSWR is high enough, the Output Monitor board will generate an RF Mute that will turn all RF Power Amplifiers OFF momentarily; then resume operation. If the high VSWR persists, the transmitter will foldback power to a safe operating level and return to normal power if the VSWR condition was temporary.
PAGE 36
Figure 4-2. A/D-D/A 4.2.6.1.1 A/D Input - Audio And DC Voltage The input signal to the A/D Converter is a combination of a positive DC voltage (presented on the wiper of the potentiometer) and the audio input. 4.2.6.1.2 A/D Output - Digital Audio Signal The digital audio signal consists of a stream of 12-bit digital words on the 12 outputs of the A/D Converter. The 12 bits are referred to as B1 through B12, where B1 is the Most Significant Bit (MSB) and B12 is the Least Significant Bit (LSB). 4.2.6.
PAGE 37
(MSB) B1 (LSB) RF B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 AMPS ON 128 64 32 16 8 4 2 1 1/2 1/4 1/8 1/16 (DECIMAL EQUIVALENT) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1/16 0 0 0 0 0 0 0 0 0 0 1 0 1/8 0 0 0 0 0 0 0 0 0 0 1 1 1/16+1/8 0 0 0 0 0 0 0 0 0 1 0 0 1/4 0 0 0 0 0 0 0 0 0 1 0 1 1/16+1/4 0 0 0 0 0 0 0 0 0 1 1 0 1/8+1/4 0 0 0 0 0 0 0 0 0 1 1 1 1/16+1/8+1/4 0 0 0 0 0 0
PAGE 38
6. If the input goes more positive, B8 will remain 1 and B12 will go from 0 to 1. Big Step #1 and the 1/16 Step will be on. 7. As the input continues to increase, the digital audio signal will continue to count up in a binary fashion until, B12 through B8 will be 1 and Big Step #1 and the 1/16, 1/8, 1/4, and 1/2 Steps are all turned on. 8. If the input goes more positive, B12 through B8 will go to 0 and B7 will be 1.
PAGE 39
Figure 4-4. Digital AM Modulation to instant, the number of RF amplifiers that are switched on also changes. For a positive modulation peak, which requires a high RF voltage (and power) at the transmitter output, a large number of RF Amplifiers are turned on. For a 100% negative modulation peak, which corresponds to zero transmitter RF voltage (and power) output, all the RF Amplifiers are turned off.
PAGE 40
includes a brief discussion of each device and references to other sections of this manual where applicable. 4.3.1 Doors And Panels Inner front and rear access doors and panels are secured with quarter-turn fasteners, and tools are required to remove them. 4.3.2 Door Interlocks Interlock switches have been installed on the inner front doors and the rear hinged doors of the transmitter, all panels of the power supply and the front panel and rear door of the output cabinet.
PAGE 41
RF Driver section includes three basic stages of amplification. This is to provide enough RF drive for the 160 Big Step and Binary RF Amplifiers. The section normally operates below its capacity, and is capable of providing the additional RF drive when required. The RF Driver section is contained in the Right PA compartment. The components that make up the section are located in the top half and in the rear of this compartment behind interlocked doors.
PAGE 42
4.5.1.5 RF Drivers The RF Driver consists of fourteen Driver RF Amplifiers, D1 through D14. The RF drive inputs are from the Predriver Splitter, and the RF outputs go to the RF Driver Combiner. The number of Drivers used is determined by the Driver Encoder board. All Drivers operate from +115VDC. Drivers D1 through D7 are always turned on, D8 - D10 are frequency determined Drivers and D11 - D14 are AGC Drivers.
PAGE 43
4.6 Transmitter AC Power Circuits NOTE: 230VAC is used in the following text for simplicity, however the Single Phase A\C MAINS can be from 198-251 VAC. 4.6.1 Single Phase AC Input Refer To Figure 4-7 and VIEW 5 for the following discussion. Single phase 230VAC input is connected to contacts on the fuse block for F1 and F2 and is connected to Low Voltage Supplies Main breaker CB1. RV7 and RV8 protect the low voltage supplies from AC transients.
PAGE 44
extended/remote control, a turn on signal from the Controller will be applied to relay K5. K5 contacts will close and allow single phase 230VAC to be applied to low voltage supply transformers T6 and T7. At this time, the low voltage supplies will be turned on and the transmitter will start the step start sequence and turn on. When the transmitter is shut OFF, the drive signal to K5 will be removed and the low voltage supplies will be turned off.
PAGE 45
The middle winding provides 12 Volts AC to the AC input of bridge rectifier CR44. The negative output of CR44 is connected to filter capacitor C11 and bleeder resistor R11. This supply is further filtered by L3 and C14. Bleeder resistor R38 is connected across C14. This forms the -12VDC or unregulated B- supply. The positive output of CR44 is connected to filter capacitor C8 and bleeder resistor R8. This supply is the +12VDC or unregulated B+ supply.
PAGE 46
Figure 4-8. Simplified RF Amp Power Supply 4-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 47
The neutral of this WYE configuration is brought out to provide 60 VDC. L1 and C5 provide additional filtering for 150-180 Hz ripple. 4.6.2.4 +230VDC Power Supply Crowbar Discharge Circuit This circuit is comprised of four power MOSFETs operating in parallel to discharge the +230VDC and +115VDC supply anytime K1 and K2 are de-energized. Q1, Q2, Q3, and Q4 function as switches which will be open when the supply is energized.
PAGE 48
4.7 Drive Multimeter 4.7.1 Introduction This section describes the Drive Multimeter board. The Drive Multimeter provides metering of the Predriver and RF Driver sections of the transmitter. A probe, with four meter positions, is also provided for AC and DC voltage measurements on printed circuit boards in the transmitter’s non-interlocked compartment. 4.7.2 Location The Drive Multimeter is located on the back side of the right PA compartment front door. (See Fig. 4-9). 4.7.
PAGE 49
The Drive Multimeter positions are defined and detailed in the Sections where the meter resistors are located. 4.7.4 Multimeter Probe The multimeter uses a flexible coiled patch cord with a clip-on probe for convenient measurement of voltages in the noninterlocked compartment. Measurement ranges available are 0 to 30 VAC Peak, 0 to +3 VDC, 0 to +30 VDC, and 0 to -30 VDC. Resistor R5, 29.4K 1%, is the multiplier resistor for the 0-3 Volt range.
PAGE 50
4.8 Control Multimeter The Control Multimeter has eight (8) inputs as follows: 4.8.1 Introduction This section describes only the inputs to the Control Multimeter. Since the Control Multimeter is exactly the same as the Drive Multimeter except for the inputs to the meter, please refer to the Drive Multimeter section for a more detailed description of the actual meter circuits. 4.8.2 Location The Control Multimeter is mounted in the center PA compartment on the upper right hand side (See Fig. 4-10). 4.8.
PAGE 51
Section V Maintenance/Alignments 5.1 Introduction This Section provides transmitter frequency change procedure and general system preventative maintenance information. than the other compartments. This is normal since these are the RF Amps being turned on. f. Check the 10 kW meter readings with the readings on the Factory Test Data Sheets under PA Voltage, PA Current, and Number Of Steps On. If all are within 10%, continue with the next step. 5.
PAGE 52
5.4 Preventive Maintenance Preventive maintenance should mainly consist of three operations: inspecting, cleaning, and tightening. 5.4.1 Inspecting This is a visual and physical inspection of the transmitter looking for loose connections, signs of corrosion and dirt, broken or overheated components and wear on moving parts. 5.4.2 Cleaning This is the stage in which the dirt and/or corrosion is removed from the transmitter and the air filters are cleaned and/or re- 5-2 placed.
PAGE 53
Section VI Troubleshooting 6.1 Introduction This section of the technical manual will contain troubleshooting procedures for the transmitter. points and points where test leads are attached before touching any points or removing test leads. This troubleshooting section is divided as follows: a. Troubleshooting Control Front Panel Indicators (Page 6-1) b. Troubleshooting Frequency Control Front Panel Indicators (Page 6-13) c. Troubleshooting Power Supply Status Panel Faults (Page 6-18) d.
PAGE 54
6.4 Troubleshooting Faults In The RF Chain If a fault occurs somewhere in the RF chain, all stages after the faulty stage will also indicate a fault. If the fault sensing circuitry has failed, the transmitter will still be on, with an RF Mute applied. Begin troubleshooting at the first stage of an indicated fault. 6.4.
PAGE 55
WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. b. Check for open fuses on the Buffer Amplifier.
PAGE 56
6.4.4.1 Loss of Driver Amplifiers 6.4.4.5 Loss of Turn-On Command a. Turn the transmitter on, and observe DS1 and DS2 on all Driver Amplifiers. 1. If any of these indicators turn RED during the step-start sequence the Driver Amplifier side associated with the indicator will need to be repaired. Refer to the Troubleshooting section for the RF Amplifier. Note If Driver amplifiers have failed, it may be possible to return to normal operation without repairing the RF Amplifiers immediately.
PAGE 57
on those Drivers. Refer to the Troubleshooting section of the RF Amplifier. 6.4.5.2 Fault Sensing a. If the above checks do not reveal the source of the problem, it is possible that the RF drive level sensing circuit has failed. Refer to the Troubleshooting section of the Driver Encoder, to determine the fault. 6.4.
PAGE 58
Note WARNING The Network VSWR circuit is inhibited during any Antenna VSWR condition. ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. e.
PAGE 59
b. Press the VSWR TEST pushbutton on the Control front panel. The VSWR TEST LED on the panel should turn RED for 5 seconds and then return to GREEN. c. If it does not change or remains RED, the VSWR test circuit is not operating correctly and the transmitter should not be operated until the problem is resolved. 6.4.9 Output Monitor Antenna VSWR 6.4.9.
PAGE 60
way of being sure that the detector circuit will return a fault to the front panel, if one does occur. 6.4.11 Output Monitor Supply Fault If the transmitter has shut itself off or is operating with an RF Mute indicator lit, and the OUTPUT MONITOR SUPPLY FAULT LED on the Control front panel is illuminated RED, then one or more power supplies has failed on this board. With the low voltage on, measure the following voltages on the Output Monitor. a.
PAGE 61
Firing Order Diagram to determine which set of eight RF Amplifiers is connected to that interlock. For example: If DS3 is illuminated RED on the A27 Modulation Encoder then RF Amplifiers RF101 through RF108 or the encoder cable is not connected or open. This example will be used for the rest of the troubleshooting procedures, and applies to any other interlock that is illuminated RED. To find a Module/Cable interlock fault, based on the above example, use the following procedures: b.
PAGE 62
Note The B- LED, DS11, will probably be dimmer than the B+ LED, DS8. NOTE It is possible to bypass a failed Modulation Encoder and operate the transmitter at a reduced power level. Refer to the Emergency Bypass section in the manual for the proper procedure. 2. If the supplies are present, troubleshoot the B+/Bregulators referring to the Troubleshooting section for the Modulation Encoders. 3.
PAGE 63
6.4.20 RF Amp Power Supply Voltage Fault If the transmitter has shut itself off and the above LED is illuminated RED on the Control front panel, the supply voltage is either over 270VDC or under 115VDC. a. Turn on the transmitter and observe the PA+VDC front panel meter position. b. If the transmitter will remain on the air long enough to measure the Supply voltage on the front panel multimeter, compare this reading to that recorded on the factory test data sheet. c.
PAGE 64
c. If DS2 is illuminated RED, check to make sure that the captive hardware is securely fastening all five rear doors to the cabinet. d. If DS2 is still illuminated: WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER.
PAGE 65
c. Verify the blowers are operational and that no blades are loose. d. Check that the exhaust airflow is not obstructed creating excessive back pressure in the cabinet(s). 6.4.29 Air Flow Fault If the transmitter has shut itself off and the above LED is illuminated RED on the Control front panel, air flow has been reduced enough to turn off the transmitter. Refer to the above AIR FLOW REDUCED section to determine the problem. 6.
PAGE 66
NOTE WARNING It is normal to see a Bandswitch Fault during the short time when the 2L1 Inductor Switch assemblies A8 and A9 are between their open/closed positions. 6.5.2.1 Measure the +24VDC relay supply using TUNE Multimeter. If the supply is missing, check F12 and troubleshoot the supply. 6.5.2.2 Make sure all cables on the Frequency Control Interface board are connected. 6.5.2.3 Observe LED bar graph DS10 and make the following measurements on the Frequency Control Interface board.
PAGE 67
WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. 1.
PAGE 68
2. If the switches check normal, use the overall wiring diagram to trace the interconnecting wires and cables between the assemblies to find the open circuit. 6.5.2.11 2C3/2C4 Illuminated a. Ensure that P10 is properly installed. b. Measure the voltage across F8, it should be 0VDC. 1. If it measures +24VDC, replace the fuse and measure again. If the fuse opens again, measure the interlock line resistance using another interlock line as a reference. c. Measure the voltage at TP20, it should be +24VDC. 1.
PAGE 69
6.5.3.4 Mechanical WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. a. Visually inspect the belts, gears, pulleys, couplers, and contacts of the assembly. 6.5.
PAGE 70
6.5.5 Power Supply Fault/RF Mute If these front panel indicators are illuminated, a power supply fault has occurred on the Frequency Control or Frequency Control Interface board. Observe the Power Supply Fault indicators on both boards. 6.5.5.1 DS16 On Frequency Control Board Illuminated RED a. Measure the +8VDC at J7-5. 1. If the supply is not present, troubleshoot the Low Voltage Supplies. 2. If the supply is present, refer to the Troubleshooting section for the Frequency Control board. 6.5.5.
PAGE 71
WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. Access the fuses for the fan by removing the cover plate from the center of the door and check for an open fuse.
PAGE 72
b. Check the cathode of CR88 on the Controller for a logic high pulse when the Step Start Contactor engages. 1. If this pulse is not present, suspect dirty aux contacts of K1, or an open cable. 2. If the Pulse is present on CR88 cathode, check U43-1 on the Controller for a low pulse after the step start contactor engages. 3. If the low is present suspect K4, K2 or an open cable. 4. If the low is not present on U43 refer to the Controller Section to troubleshoot loss of Turn on. 6.7.2.
PAGE 73
6.8.3 Controller Breaker (CB2) Trips If CB2 trips when CB1 is set to the on position: a. Turn off A/C power. WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. b.
PAGE 74
6.8.6 Distortion The areas of the transmitter that have an effect on distortion are: a. Output Network Tuning b. RF Amp failures (missing steps) c. Analog Input Board d. Driver Encoder (A/D Phasing) e. A to D Converter (spikes, spurious pulses) and, f. Modulation Encoders (missing steps). Refer to the Installation Section for Optimizing Tuning for Best distortion and the alignment or Troubleshooting sections of the individual boards as needed. A suggested order to check the sections is a. b. c. d. e. f.
PAGE 75
NOTE When measuring RF Amplifier drain waveform, the amplifier to be measured must be turned “ON” to give a correct measurement. There will be no drain waveform from an “OFF” amplifier. LED indicators DS3 will illuminate GREEN when an amplifier is on. NOTE For maximum protection of personnel it is recommended to use the scope probe (610-1131-000) or equivalent X10 scope probe to access this point since the long tip will reach through the air slots in the inner door. a.
PAGE 76
6-24 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 77
Section VIA Emergency Operating Procedures 6.1 Introduction WARNING The following section is intended to make the maintenance personnel aware of some of the bypass modes of operation that are possible in the transmitter. If certain failures occur, it is possible to temporarily bypass the source of the problem and remain operational at the highest possible power level until proper maintenance can be performed.
PAGE 78
2. Using the FLEXCODE chart, rotate S7 from 12 to 5 and rotate S8 from 9 to 8. 3. Now the Step that was RF156 is effectively Step 133. 6.3 Audio/Digital Modulation System By- passing 6.3.1 Analog Input Bypassing On the Analog Input board, three types of bypassing are possible without compromising transmitter protection. They are as follows: 6.3.1.
PAGE 79
6.3.3.1 A29 Bypass And ROM Switching a. Bypass the encoder using the procedure described earlier. b. Carefully remove JP1, JP2, JP4, and JP5 from the A29 Modulation Encoder. These dip jumper plugs are labeled ME1, ME2, ME3, and ME4. NOTE Carefully align pin 1 of the jumper to pin 1 of the socket and ensure the rest of the pins are in the correct position. Push the jumper straight into the socket until all pins are seated into the socket. c. On the A26 encoder: 1. Install ME1 into JP1 2.
PAGE 80
6.4.3 Driver Encoder Bypassing If it has been determined that the output of an encoder PAL on the Driver Encoder is incorrect, it is possible to manually program the input to the Driver. a. With the transmitter turned OFF, remove the gold jumper plug that is connected to the inverter input at JP2 or JP3. 6A-4 1. If the PAL output should be logic low (Driver off) but is not, connect the input to the inverter to ground. 2.
PAGE 81
SECTION VII PARTS LIST Replaceable Parts List Index Table 7-1. Table 7-2. Table 7-3. Table 7-4. Table 7-5. Table 7-6. Table 7-7. Table 7-8. Table 7-9. Table 7-10. Table 7-11. Table 7-12. Table 7-13. Table 7-14. Table 7-15. Table 7-16. Table 7-17. Table 7-18. Table 7-19. Table 7-20. Table 7-21. Table 7-22. Table 7-23. Table 7-24. Table 7-25. Table 7-26. Table 7-27. Table 7-28. Table 7-29. Table 7-30. Table 7-31. Table 7-32. Table 7-33. Table 7-34. Table 7-35. Table 7-36. Table 7-37. Table 7-38. Table 7-39.
PAGE 82
Table 7-49. Table 7-50. Table 7-51. Table 7-52. Table 7-53. Table 7-54. Table 7-55. Table 7-56. Table 7-57. Table 7-58. 7-2 DRIVER ENCODER BD, . . . . XMTR INTERFACE BD, . . . . . SYNTHESIZER INTERFACE BD RF INTERFACE BD, . . . . . . EXTERNAL INTERFACE BD, . . POWER SUPPLY INTERFACE . PWA, DX100-3F CONTROLLER PWA, 3 FREQ SELECT . . . . . INSTALLATION KIT . . . . . . . . AIR FILTER SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 83
Table 7-1. XMTR DX100-3F MW - 994 9369 103 (F) Harris PN 646 1662 015 646 1662 030 988 2339 002 992 8518 002 992 8519 002 992 8520 002 992 8585 004 992 8642 002 994 9511 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... Description QTY UM Reference Designators NAMEPLATE, DX100. . . . . . . . . . . . . . . . . . 1 . . . . . PRODUCT LINE IS OK WITH STANDARD DX100 NAMEPLATE NAMEPLATE, HARRIS . . . . . . . . . . . . . . . . 1 . . . . . DP, DX100-3F XMTR . . . . . .
PAGE 84
402 0014 000. . . . . . . . . . FUSE HOLDER, 2 POLE . . . . . . . . . . . . . . . 1 . . EA 402 0130 000. . . . . . . . . . FUSE HOLDER, 3 POLE . . . . . . . . . . . . . . . 9 . . EA 410 0008 000. . . . . . . . . . INSULATOR ROUND NS5W 0205 . . . . . . . . 2 . . EA 424 0001 000. . . . . . . . . . GROMMET 3/8 MTG DIA . . . . . . . . . . . . . . . 1 . . EA 424 0023 000. . . . . . . . . . GROMMET 1 IN MTG DIA . . . . . . . . . . . . . . 10.00EA 424 0055 000. . . . . . . . . . BUMPER RUBBER 3/8" ID . . . . . . .
PAGE 85
813 4999 031 813 5000 030 813 5007 041 813 5009 005 817 2150 001 817 2150 004 817 2150 013 817 2150 033 817 2150 034 817 2150 037 822 0922 018 822 0922 027 822 0922 033 822 0922 048 822 0922 075 822 0922 112 822 0922 137 822 0922 150 822 0922 165 822 0999 001 822 0999 002 822 0999 003 822 0999 018 822 0999 019 822 0999 024 822 0999 025 822 0999 029 822 0999 033 822 0999 038 822 0999 040 822 0999 041 822 0999 061 822 0999 071 822 0999 072 822 0999 126 829 9009 142 829 9009 250 839 7855 021 839 7855 042 839 7
PAGE 86
843 5155 162. . . . . . . . . . DIAGRAM, MOD ENC FIRING . . . . . . . . . . . 0 . . . . . 917 2150 009. . . . . . . . . . PLATE, BTM CONTACT . . . . . . . . . . . . . . . . 3 . . EA 917 2150 029. . . . . . . . . . TEMP SENSOR . . . . . . . . . . . . . . . . . . . . . . 1 . . EA 917 2150 535. . . . . . . . . . STANDOFF . . . . . . . . . . . . . . . . . . . . . . . . . . 44 . EA 917 2150 539. . . . . . . . . . RES MTG BRACKET . . . . . . . . . . . . . . . . . . 2 . . EA 917 2150 540. . . . . . . . . .
PAGE 87
939 7930 616 939 7930 617 939 7930 618 939 7930 619 939 7930 620 939 7930 621 939 7930 623 939 7930 624 939 7930 625 939 7930 626 939 7930 627 939 7930 628 939 7930 629 939 7930 660 939 7930 662 939 7930 663 939 7930 664 939 7930 665 939 7930 666 939 7930 680 939 7930 681 939 7930 682 943 5155 112 943 5155 114 943 5155 572 943 5155 574 943 5155 602 943 5155 603 943 5155 604 943 5155 605 943 5155 606 943 5155 607 943 5155 608 943 5155 609 943 5155 610 943 5155 611 943 5155 612 943 5155 613 943 5155 627 943 5
PAGE 88
943 5155 669. . . . . . . . . . TOP DRVR SHELF . . . . . . . . . . . . . . . . . . . . 1 . . 943 5155 698. . . . . . . . . . SPLITTER DECK . . . . . . . . . . . . . . . . . . . . . 1 . . 943 5155 828. . . . . . . . . . SHIELD, LEFT FRONT DOOR, PAC . . . . . . 1.0 . 943 5450 357. . . . . . . . . . DRIVER DRIVE CABLE . . . . . . . . . . . . . . . . 4 . . 943 5450 469. . . . . . . . . . RF DRIVE CABLE. . . . . . . . . . . . . . . . . . . . . 20 . 992 5889 002. . . . . . . . . . PWA, IPA PWR SPLITTER,ESD SAFE .
PAGE 89
Table 7-4. PWA, MULTIMETER/PROBE,ESD SAFE - 992 6752 005 (B) Harris PN 384 0431 000 384 0612 000 516 0530 000 516 0555 000 548 2400 401 548 2400 446 548 2400 543 548 2400 547 548 2400 550 600 0606 000 604 0605 000 610 0978 000 610 0980 000 610 1210 000 632 1133 000 700 1305 000 839 6208 302 843 4038 202 999 2446 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .........
PAGE 90
516 0530 000. . . . . . . . . . CAP .01UF 10% 100V X7R. . . . . . . . . . . . . . 1 516 0792 000. . . . . . . . . . CAP NETWORK .1UF 10%. . . . . . . . . . . . . . 2 516 0907 000. . . . . . . . . . CAP 0.330UF 10% 50V. . . . . . . . . . . . . . . . . 1 522 0531 000. . . . . . . . . . CAP 1UF 50V 20% . . . . . . . . . . . . . . . . . . . . 1 522 0548 000. . . . . . . . . . CAP 10UF 50V 20% . . . . . . . . . . . . . . . . . . . 6 522 0569 000. . . . . . . . . . CAP 100UF 50V 20% . . . . . . . . . . . . . . .
PAGE 91
508 0549 000 542 0095 000 542 0121 000 548 2400 385 548 2400 401 548 2400 407 548 2400 466 548 2400 518 548 2400 547 610 0999 000 620 0515 000 839 7930 030 843 5100 029 999 2576 004 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... CAP .33UF 5% 400VDC. . . . . . . . . . . . . . . . RES 10K OHM 5% 12W. . . . . . . . . . . . . . . . RES 150 OHM 5% 20W . . . . . . . . . . . . . . . . RES 7.5K OHM 1/2W 1%. . . . . . . .
PAGE 92
508 0550 000. . . . . . . . . . CAP .1UF 600V 5%. . . . . . . . . . . . . . . . . . . . 1 516 0419 000. . . . . . . . . . CAP .05 UF 500V . . . . . . . . . . . . . . . . . . . . . 2 540 1600 017. . . . . . . . . . RES 4.7 OHM 3W 5% . . . . . . . . . . . . . . . . . . 2 540 1600 412. . . . . . . . . . RES 30K OHM 3W 5% . . . . . . . . . . . . . . . . . 1 540 1600 419. . . . . . . . . . RES 56K OHM 3W 5% . . . . . . . . . . . . . . . . . 2 542 1600 000. . . . . . . . . . RES 0.1 OHM 5W 5% . . . . . . . . . .
PAGE 93
410 0405 000 516 0453 000 522 0550 000 540 1434 000 540 1457 000 548 2400 401 548 2400 566 604 0905 000 604 1089 000 610 1043 000 839 7930 006 843 5155 006 999 2624 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... THERMAL INTERFACE, TO220 . . . . . . . . . CAP .1UF 100V 20% X7R . . . . . . . . . . . . . . CAP 100UF 25V 20%. . . . . . . . . . . . . . . . . . RES NETWORK 330 OHM 2% . . . . . . . . . .
PAGE 94
404 0513 000. . . . . . . . . . HEAT SINK PA1-1CB . . . . . . . . . . . . . . . . . . 2 . . 404 0673 000. . . . . . . . . . SOCKET, DIP, 8 PIN (DL). . . . . . . . . . . . . . . 1 . . 404 0674 000. . . . . . . . . . SOCKET, DIP, 14 PIN (DL). . . . . . . . . . . . . . 6 . . 404 0675 000. . . . . . . . . . SOCKET, DIP, 16 PIN (DL). . . . . . . . . . . . . . 5 . . 404 0767 000. . . . . . . . . . SOCKET, DIP, 20 PIN (DL). . . . . . . . . . . . . . 12 . EA EA EA EA EA 404 0797 000. . . . . . . . . .
PAGE 95
548 2400 581 548 2400 601 604 0905 000 604 1089 000 610 0679 000 610 0900 000 610 0918 000 610 0981 000 610 1043 000 610 1070 000 610 1107 000 612 0904 000 612 1184 000 839 7930 021 843 5155 021 917 2210 001 917 2210 002 917 2210 003 917 2210 004 917 2210 005 917 2210 006 917 2210 007 917 2210 008 917 2210 009 917 2210 010 917 2210 011 999 2626 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .........
PAGE 96
384 0612 000. . . . . . . . . . DIODE 1N3070 ESD . . . . . . . . . . . . . . . . . . 6 . . 384 0661 000. . . . . . . . . . LED, GRN, T 1-3/4, RT ANG ESD . . . . . . . . 3 . . 384 0662 000. . . . . . . . . . LED RED ESD . . . . . . . . . . . . . . . . . . . . . . . 2 . . 384 0719 000. . . . . . . . . . TRANSZORB 1N6373 5V 5W ESD . . . . . . . 1 . . 384 0720 000. . . . . . . . . . TRANSZORB 1N6377 15V 5W ESD . . . . . . 2 . . 398 0465 000. . . . . . . . . . FUSE, FAST CART 2A 250V . . . . . . . . . . . . 3 .
PAGE 97
548 2400 401 . . . . . . . . . RES 10K OHM 1/2W 1% . . . . . . . . . . . . . . . 27 . . EA 548 2400 402 548 2400 428 548 2400 431 548 2400 434 548 2400 442 548 2400 451 548 2400 501 548 2400 577 548 2400 581 604 1064 000 610 0811 000 610 0900 000 610 0979 000 610 1043 000 610 1107 000 610 1121 000 612 1184 000 620 0515 000 843 5458 471 843 5458 473 917 2210 014 999 2630 002 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ...
PAGE 98
384 0612 000. . . . . . . . . . DIODE 1N3070 ESD . . . . . . . . . . . . . . . . . . 24 . EA 384 0661 000. . . . . . . . . . LED, GRN, T 1-3/4, RT ANG ESD . . . . . . . . 5 . . 384 0662 000. . . . . . . . . . LED RED ESD . . . . . . . . . . . . . . . . . . . . . . . 8 . . 384 0664 000. . . . . . . . . . LED YELLOW ESD . . . . . . . . . . . . . . . . . . . 1 . . 384 0719 000. . . . . . . . . . TRANSZORB 1N6373 5V 5W ESD . . . . . . . 7 . . 384 0838 000. . . . . . . . . . TRANSZORB 1N6380 36V 5W ESD . . . .
PAGE 99
540 1380 000 540 1386 000 540 1430 000 540 1443 000 540 1493 000 540 1496 000 540 1600 115 ......... ......... ......... ......... ......... ......... ......... RES NETWORK 10K OHM 2% . . . . . . . . . . RES NETWORK 10K OHM 2% . . . . . . . . . . RES NETWORK, 10K OHM 2%. . . . . . . . . . RES NETWORK 27 OHM 2% . . . . . . . . . . . RES NETWORK 100K OHM . . . . . . . . . . . . RES NETWORK 100 OHM . . . . . . . . . . . . . RES 39 OHM 3W 5% . . . . . . . . . . . . . . . . . . 8... 4... 4... 2... 2... 4...
PAGE 100
604 0905 000. . . . . . . . . . SW, PB MOMENTARY . . . . . . . . . . . . . . . . . 1 . . EA 610 0870 000. . . . . . . . . . PLUG, NON-INS SHORTING . . . . . . . . . . . . 34 . EA 610 0900 000. . . . . . . . . . HEADER 3 CKT STRAIGHT . . . . . . . . . . . . . 2 . . EA 610 0980 000. . . . . . . . . . *HDR 20C RT ANG 2ROW TOP LATCH . . . 4 . . EA 610 0981 000. . . . . . . . . . *HDR 20C VERT 2ROW TOP LATCH . . . . . 1 . . EA 610 1043 000. . . . . . . . . . *HDR 40C VERT 2ROW TOP LATCH . . . . . 1 . .
PAGE 101
384 0661 000 384 0662 000 384 0664 000 384 0719 000 384 0838 000 386 0016 000 386 0082 000 386 0100 000 386 0123 000 386 0425 000 398 0020 000 398 0021 000 398 0022 000 398 0465 000 402 0129 000 402 0198 000 404 0509 000 404 0513 000 404 0673 000 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... LED, GRN, T 1-3/4, RT ANG ESD . . . . . . . LED RED ESD. . . . . . . . .
PAGE 102
540 1380 000. . . . . . . . . . RES NETWORK 10K OHM 2%. . . . . . . . . . . 8 . . 540 1386 000. . . . . . . . . . RES NETWORK 10K OHM 2%. . . . . . . . . . . 4 . . 540 1430 000. . . . . . . . . . RES NETWORK, 10K OHM 2% . . . . . . . . . . 4 . . 540 1443 000. . . . . . . . . . RES NETWORK 27 OHM 2% . . . . . . . . . . . . 2 . . 540 1493 000. . . . . . . . . . RES NETWORK 100K OHM. . . . . . . . . . . . . 2 . . 540 1496 000. . . . . . . . . . RES NETWORK 100 OHM . . . . . . . . . . . . . . 4 . .
PAGE 103
550 0858 000 550 0959 000 600 0579 000 604 0905 000 610 0870 000 610 0900 000 610 0980 000 610 0981 000 610 1043 000 610 1054 000 610 1098 000 610 1106 000 610 1107 000 612 0904 000 612 1176 000 612 1184 000 612 1369 000 839 7930 011 839 7930 105 843 5155 011 917 2150 054 917 2150 803 917 2210 012 917 2210 016 917 2542 001 999 2660 002 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ...
PAGE 104
540 1600 401. . . . . . . . . . RES 10K OHM 3W 5% . . . . . . . . . . . . . . . . . 4 542 0051 000. . . . . . . . . . RES 3 OHM 5% 12W . . . . . . . . . . . . . . . . . . 2 542 0062 000. . . . . . . . . . RES 200 OHM 5% 12W . . . . . . . . . . . . . . . . 4 546 0313 000. . . . . . . . . . RES 50 OHM 5W 5% . . . . . . . . . . . . . . . . . . 1 548 2400 101. . . . . . . . . . RES 10 OHM 1/2W 1% . . . . . . . . . . . . . . . . . 4 548 2400 201. . . . . . . . . . RES 100 OHM 1/2W 1% . . . . . . . . . . . . . .
PAGE 105
548 2400 142 548 2400 185 548 2400 501 548 2400 589 610 0978 000 839 7930 022 843 5155 022 917 2542 001 999 2657 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... RES 26.7 OHM 1/2W 1% . . . . . . . . . . . . . . . RES 75 OHM 1/2W 1% . . . . . . . . . . . . . . . . RES 100K OHM 1/2W 1% . . . . . . . . . . . . . . RES 825K OHM 1/2W 1% . . . . . . . . . . . . . . *HDR 10C RT ANG 2ROW TOP LATCH . . . SCHEM, AIR FLOW MON . . . . . . . . . . . . . . PWB, AIR FLOW MON.
PAGE 106
839 7930 504. . . . . . . . . . SCHEM, COMBINER MB,DRIVER . . . . . . . . 0 . . . . . 843 5155 504. . . . . . . . . . PWB, COMBINER MB, DRIVER. . . . . . . . . . 1 . . . . . 917 2150 603. . . . . . . . . . SPACER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 . EA 922 0922 156. . . . . . . . . . TRANSFORMER. . . . . . . . . . . . . . . . . . . . . . 2 . . EA 922 0999 598. . . . . . . . . . STANDOFF . . . . . . . . . . . . . . . . . . . . . . . . . . 16 . EA 922 0999 617. . . . . . . . . .
PAGE 107
522 0630 000 . . . . . . . . . CAP 100 UF 400V 20% . . . . . . . . . . . . . . . . 8 . . . EA 540 1600 422 . . . . . . . . . RES 75K OHM 3W 5%. . . . . . . . . . . . . . . . . 4 . . . EA 610 1051 000 . . . . . . . . . HOUSING 28 DUAL POSITIONS. . . . . . . . . 16 . . EA 610 1084 000 610 1088 000 610 1141 000 610 1143 000 ......... ......... ......... ......... HDR 10 PIN/ACTION PINS . . . . . . . . . . . . . LATCH .576 FOR EJECTION . . . . . . . . . . . HEADER 10 POS RIGHT ANGLE . . . . . . . .
PAGE 108
Table 7-24. PRE DRIVER TUNING BD, - 992 8604 001 (E2) Harris PN Description QTY UM Reference Designators 051 0001 023. . . . . . . . . . *ADHESIVE, DP-190 GRAY . . . . . . . . . . . . . 0 . . EA #L001,#L002,#L003 2520247000A . . . . . . . . . *WIRE, STRD 18AWG YEL . . . . . . . . . . . . . 2 . . . FT #L001,#L002,#L003 2540004000A . . . . . . . . . *WIRE, BUS CU 16AWG . . . . . . . . . . . . . . . 1 . . . FT #C007,#C008,#C009,#JP002 354 0010 000. . . . . . . . . . LUG #10 RING BLU 16-14AWG . . . . . . . . .
PAGE 109
939 7930 639 939 7930 641 939 7930 642 939 8127 001 939 8127 002 939 8127 003 939 8127 004 939 8127 005 939 8127 006 939 8127 009 939 8127 010 939 8127 011 939 8127 012 939 8127 013 939 8127 014 943 5155 635 943 5155 636 943 5155 637 943 5155 638 943 5155 671 943 5155 672 943 5155 673 943 5155 683 994 7784 002 994 7784 003 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......
PAGE 110
384 0719 000. . . . . . . . . . TRANSZORB 1N6373 5V 5W ESD . . . . . . . 1 . . 384 0720 000. . . . . . . . . . TRANSZORB 1N6377 15V 5W ESD . . . . . . 2 . . 384 0731 000. . . . . . . . . . * DIODE, SWITCHING 1N4607 ESD . . . . . . 1 . . 384 0799 000. . . . . . . . . . DIODE, BIPOLAR ESD . . . . . . . . . . . . . . . . 2 . . 386 0123 000. . . . . . . . . . ZENER, 1N4732A 4.7V ESD . . . . . . . . . . . . 1 . . 386 0135 000. . . . . . . . . . ZENER, 1N4733A 5.1V ESD . . . . . . . . . . . . 3 . . 386 0427 000.
PAGE 111
548 2400 285 548 2400 295 548 2400 301 548 2400 312 548 2400 330 548 2400 332 548 2400 335 548 2400 342 548 2400 347 548 2400 351 548 2400 354 548 2400 364 548 2400 366 548 2400 368 548 2400 369 548 2400 373 548 2400 389 548 2400 401 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... RES 750 OHM 1/2W 1% . . . . . . . . . . . . . . . RES 953 OHM 1/2W 1% . . . . . . . . . . . . .
PAGE 112
604 1089 000. . . . . . . . . . SW, TGL SPDT PC MOUNT. . . . . . . . . . . . . 1 610 0900 000. . . . . . . . . . HEADER 3 CKT STRAIGHT . . . . . . . . . . . . . 5 610 0979 000. . . . . . . . . . *HDR 10C VERT 2ROW TOP LATCH . . . . . 1 610 0981 000. . . . . . . . . . *HDR 20C VERT 2ROW TOP LATCH . . . . . 1 610 1043 000. . . . . . . . . . *HDR 40C VERT 2ROW TOP LATCH . . . . . 1 610 1070 000. . . . . . . . . . HDR 6 PIN STRAIGHT . . . . . . . . . . . . . . . . . 2 610 1107 000. . . . . . . . . .
PAGE 113
516 0208 000 530 0002 000 530 0005 000 530 0008 000 580 0009 000 ......... ......... ......... ......... ......... CAP, RF, 50PF 15KV 10% NPO . . . . . . . . . FLANGE, MOUNTING, VACUUM CAP . . . . FLG MTG TERMINAL FM2 . . . . . . . . . . . . . FLANGE MOUNT FM2S . . . . . . . . . . . . . . . RELAY, VACUUM, SPST. . . . . . . . . . . . . . . 1... 8... 1... 1... 11 . .
PAGE 114
922 0999 553. . . . . . . . . . STANDOFF . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 922 0999 556. . . . . . . . . . COND ASSY . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . 922 0999 557. . . . . . . . . . GND HOOK MTG ANGLE. . . . . . . . . . . . . . . 2 . . 922 0999 558. . . . . . . . . . SWITCH MTG ANGLE . . . . . . . . . . . . . . . . . 2 . . 922 0999 559. . . . . . . . . . SPARK GAP BAR 4-1/2 . . . . . . . . . . . . . . . . 1 . . 922 0999 562. . . . . . . . . . SHIPPING PLATE. .
PAGE 115
943 5155 584 943 5155 585 943 5155 586 943 5155 587 943 5155 588 943 5155 589 943 5155 590 943 5155 591 943 5155 592 943 5155 593 943 5155 594 943 5155 595 943 5155 596 943 5155 807 943 5155 811 943 5155 812 952 9180 009 992 8203 001 992 8363 001 992 8552 001 992 8555 001 992 8677 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .........
PAGE 116
354 0008 000. . . . . . . . . . LUG #6 RING BLUE 16-14AWG. . . . . . . . . . 1 . . EA 354 0009 000. . . . . . . . . . LUG #8 RING BLUE 16-14AWG. . . . . . . . . . 1 . . EA 354 0010 000. . . . . . . . . . LUG #10 RING BLU 16-14AWG . . . . . . . . . . 1 . . EA 354 0015 000. . . . . . . . . . LUG BLUE SPADE 6 . . . . . . . . . . . . . . . . . . 11 . EA 354 0023 000. . . . . . . . . . LUG #6 RING YEL 12-10AWG . . . . . . . . . . . 3 . . EA 354 0252 000. . . . . . . . . . TERM 250 FEM BLU 16-14 . . . . . . . . .
PAGE 117
Table 7-31. CAPACITOR SERVO DRIVE - 992 8551 001 (H) Harris PN 306 0052 000 336 0264 000 354 0147 000 356 0087 000 358 2995 000 424 0149 000 424 0623 000 438 0054 000 450 0055 000 450 0056 000 450 0173 000 548 0402 000 548 2400 218 552 0827 000 614 0127 000 614 0786 000 614 0787 000 839 7930 717 917 2150 600 922 0999 527 922 0999 528 922 0999 530 922 0999 619 922 0999 676 939 7930 575 939 7930 768 943 5155 582 ......... ......... ......... ......... ......... ......... ......... ......... ......... .......
PAGE 118
922 0999 527. . . . . . . . . . POT ADJUST PLT . . . . . . . . . . . . . . . . . . . . 1 922 0999 528. . . . . . . . . . POT ASSY ADJUST PLT . . . . . . . . . . . . . . . 1 922 0999 529. . . . . . . . . . PULLEY RETAINING CVR . . . . . . . . . . . . . . 1 922 0999 530. . . . . . . . . . MOTOR MTG PLT . . . . . . . . . . . . . . . . . . . . 1 922 0999 534. . . . . . . . . . IDLER PULLEY . . . . . . . . . . . . . . . . . . . . . . . 1 922 0999 535. . . . . . . . . . IDLER SHAFT . . . . . . . . . . . . . . . .
PAGE 119
548 2400 142 610 0978 000 670 0049 000 839 7930 517 843 5155 517 ......... ......... ......... ......... ......... RES 26.7 OHM 1/2W 1% . . . . . . . . . . . . . . . *HDR 10C RT ANG 2ROW TOP LATCH . . . PHOTOCELL TO-8 HERMETIC. . . . . . . . . . SCHEM, ARC DETECTOR BD . . . . . . . . . . PWB, ARC DETECTOR . . . . . . . . . . . . . . . . 2 . . . EA 1 . . . EA 2..... 0..... 1..... R003,R004 J001 R001,R002 Table 7-35.
PAGE 120
448 0959 000. . . . . . . . . . FILTER, AIR . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 456 0144 000. . . . . . . . . . SPRING, EJECTOR . . . . . . . . . . . . . . . . . . . 16 . 472 1660 000. . . . . . . . . . XFMR, PWR . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . 472 1666 000. . . . . . . . . . XFMR, INTERPHASE . . . . . . . . . . . . . . . . . . 2 . . 472 1685 000. . . . . . . . . . XFMR, PWR 817-2150-006 . . . . . . . . . . . . . 1 . . 472 1686 000. . . . . . . . . .
PAGE 121
614 0793 000 614 0817 000 646 0973 000 646 1253 201 646 1350 000 646 1386 000 740 1183 000 740 1185 000 813 4999 034 813 5007 026 817 2150 023 817 2150 037 822 0922 040 822 0922 048 822 0999 010 822 0999 018 822 0999 049 822 0999 050 822 0999 051 822 0999 053 822 0999 055 822 0999 060 822 0999 064 822 0999 076 822 0999 086 822 0999 087 822 0999 094 822 0999 095 822 0999 122 829 9009 187 839 7930 114 839 7930 133 839 7930 134 843 5155 552 917 2150 029 917 2150 535 917 2150 544 917 2150 545 917 2150 548 917 2
PAGE 122
939 7930 592. . . . . . . . . . PAC CAP BRACKET. . . . . . . . . . . . . . . . . . . 2 939 7930 594. . . . . . . . . . RECTIFIER HEATSINK . . . . . . . . . . . . . . . . 8 939 7930 595. . . . . . . . . . RECTIFIER BUS BAR. . . . . . . . . . . . . . . . . . 4 939 7930 596. . . . . . . . . . PSC CAP BRACKET. . . . . . . . . . . . . . . . . . . 1 939 7930 597. . . . . . . . . . CLOSEOUT PLATE, REAR . . . . . . . . . . . . . 1 939 7930 598. . . . . . . . . . CLOSEOUT PLATE, REAR . . . . . . . . . . . . .
PAGE 123
817 2435 974 917 2150 564 917 2150 605 922 0999 585 922 0999 623 943 5155 091 943 5155 691 943 5155 804 943 5523 981 952 9180 505 952 9180 509 992 8179 001 992 8526 003 992 8537 005 992 8540 003 992 8588 001 992 8629 001 992 8631 001 992 8643 001 992 9511 588 992 9764 500 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... .........
PAGE 124
Table 7-42. VIEW LOCATION PLATE - 943 5155 691 (A) Harris PN Description QTY UM Reference Designators 839 7930 643. . . . . . . . . . SILKSCREEN . . . . . . . . . . . . . . . . . . . . . . . . 0 . . . . . 843 5155 691. . . . . . . . . . ASSY INSTR, VIEW LOCATION . . . . . . . . . 0 . . . . . 001 5010 030. . . . . . . . . . AL, SH .032 THK. . . . . . . . . . . . . . . . . . . . . . 1.407 LB Table 7-43. CABLE, SHUNT METER - 943 5155 804 (A) Harris PN Description QTY UM Reference Designators 253 0052 000. . .
PAGE 125
Table 7-46. CABLE PAC R-DOOR AC DIST. - 952 9180 509 (B1) Harris PN 2520006000A . . . . . . . . . 296 0262 000 . . . . . . . . . 354 0010 000 . . . . . . . . . 354 0015 000 . . . . . . . . . 354 0796 000 . . . . . . . . . 612 1326 000 . . . . . . . . . 817 2150 570 . . . . . . . . . 852 9180 509 . . . . . . . . . Description QTY UM Reference Designators *WIRE, STRD 14AWG BLU . . . . . . . . . . . . . 127.600 FT ............................................................ .............
PAGE 126
516 0453 000. . . . . . . . . . CAP .1UF 100V 20% X7R. . . . . . . . . . . . . . . 31 . EA 516 0790 000. . . . . . . . . . CAP NTWK 1000PF 10% 50V . . . . . . . . . . . 1 . . EA 516 0792 000. . . . . . . . . . CAP NETWORK .1UF 10%. . . . . . . . . . . . . . 5 . . EA 516 0834 000. . . . . . . . . . CAP 0.047UF 10% 50V. . . . . . . . . . . . . . . . . 2 . . EA 522 0550 000. . . . . . . . . . CAP 100UF 25V 20% . . . . . . . . . . . . . . . . . . 3 . . EA 522 0570 000. . . . . . . . . . CAP 2.2UF 50V 20%. . .
PAGE 127
Table 7-48. FREQ CTRL INTFC BD - 992 8526 003 (A) Harris PN 2520002000A . . . . . . . . . 296 0253 000 . . . . . . . . . 324 0281 000 . . . . . . . . . 354 0309 000 . . . . . . . . . 358 1214 000 358 2684 000 358 3377 000 380 0189 000 380 0614 000 380 0728 000 380 0740 000 382 0184 000 382 0359 000 382 0360 000 382 0676 000 382 0739 000 382 0742 000 382 0749 000 382 0774 000 382 0775 000 382 0882 000 382 1011 000 382 1054 000 382 1084 000 382 1305 000 382 1307 000 382 1664 000 384 0431 000 ......... .....
PAGE 128
404 0675 000. . . . . . . . . . SOCKET, DIP, 16 PIN (DL). . . . . . . . . . . . . . 11 . EA 404 0767 000. . . . . . . . . . SOCKET, DIP, 20 PIN (DL). . . . . . . . . . . . . . 8 . . EA 404 0797 000. . . . . . . . . . SOCKET, DIP, 24 PIN (DL). . . . . . . . . . . . . . 13 . EA 410 0382 000. . . . . . . . . . INSULATOR #4 SCREW . . . . . . . . . . . . . . . 4 . . EA 410 0385 000. . . . . . . . . . INSULATOR TO-3 SILICON . . . . . . . . . . . . . 2 . . EA 516 0453 000. . . . . . . . . . CAP .1UF 100V 20% X7R.
PAGE 129
548 2400 343 548 2400 347 548 2400 351 548 2400 364 548 2400 377 548 2400 401 ......... ......... ......... ......... ......... ......... RES 2.74K OHM 1/2W 1%. . . . . . . . . . . . . . RES 3.01K OHM 1/2W 1%. . . . . . . . . . . . . . RES 3.32K OHM 1/2W 1%. . . . . . . . . . . . . . RES 4.53K OHM 1/2W 1%. . . . . . . . . . . . . . RES 6.19K OHM 1/2W 1%. . . . . . . . . . . . . . RES 10K OHM 1/2W 1% . . . . . . . . . . . . . . . 3... 1... 1... 1... 1... 34 . .
PAGE 130
Table 7-49. DRIVER ENCODER BD, - 992 8537 005 (A) Harris PN Description QTY UM Reference Designators 354 0309 000. . . . . . . . . . TERM SOLDER . . . . . . . . . . . . . . . . . . . . . . 23 . EA TP001,TP002,TP003,TP004,TP005,TP006,TP007,TP008,TP009,TP010,TP 011,TP012,TP013,TP014,TP015,TP016,TP017,TP018,TP019,TP020,TP021 ,TP022,TP023 358 1928 000. . . . . . . . . . JUMPER 1/4 LG 1/8H . . . . . . . . . . . . . . . . . . 2 . . EA JP012,JP013 380 0125 000. . . . . . . . . . XSTR, NPN 2N4401 ESD . . . . . . .
PAGE 131
516 0736 000 516 0792 000 522 0561 000 526 0050 000 526 0097 000 526 0106 000 526 0358 000 540 1365 000 540 1366 000 540 1380 000 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... CAP .001UF 10% 100V X7R . . . . . . . . . . . . CAP NETWORK .1UF 10% . . . . . . . . . . . . . CAP 100UF 63V 20%. . . . . . . . . . . . . . . . . . CAP 1UF 35V 20%. . . . . . . . . . . . . . . . . . . . CAP 47UF 35V 20%. . . . . . . . . . . . . . . . . . . CAP 27UF 35V 10%. . . .
PAGE 132
548 2400 501. . . . . . . . . . RES 100K OHM 1/2W 1%. . . . . . . . . . . . . . . 7 . . EA 548 2400 530. . . . . . . . . . RES 200K OHM 1/2W 1%. . . . . . . . . . . . . . . 1 . . EA 548 2400 601. . . . . . . . . . RES 1MEG OHM 1/2W 1%. . . . . . . . . . . . . . 5 . . EA 550 0949 000. . . . . . . . . . TRIMPOT 100K OHM 1/2W 10% . . . . . . . . . 1 . . EA 550 0958 000. . . . . . . . . . TRIMPOT 10K OHM 1/2W 10% . . . . . . . . . . 2 . . EA 578 0026 000. . . . . . . . . . RELAY DPDT 12VDC 2 AMP . . . . . . . .
PAGE 133
540 0563 000 540 0587 000 540 1365 000 540 1380 000 540 1416 000 540 1421 000 540 1427 000 540 1493 000 548 2400 301 548 2400 330 548 2400 369 548 2400 401 548 2400 447 548 2400 449 548 2400 485 548 2400 501 548 2400 547 604 1070 000 610 0900 000 610 0978 000 610 0979 000 610 0980 000 610 0981 000 610 1043 000 610 1107 000 610 1117 000 612 1184 000 614 0790 000 620 0515 000 843 5155 512 843 5155 847 999 2712 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... .....
PAGE 134
384 0612 000. . . . . . . . . . DIODE 1N3070 ESD . . . . . . . . . . . . . . . . . . 7 . . 384 0661 000. . . . . . . . . . LED, GRN, T 1-3/4, RT ANG ESD . . . . . . . . 2 . . 384 0719 000. . . . . . . . . . TRANSZORB 1N6373 5V 5W ESD . . . . . . . 1 . . 384 0720 000. . . . . . . . . . TRANSZORB 1N6377 15V 5W ESD . . . . . . 1 . . 384 0823 000. . . . . . . . . . LED 10 SEG BARGRAPH, RED ESD . . . . . 1 . . 386 0429 000. . . . . . . . . . ZENER 1N5346A 9.1V 5W 10% ESD . . . . . 1 . . 398 0465 000. . . . . . .
PAGE 135
610 0900 000 610 0979 000 610 0999 000 610 1043 000 612 1184 000 612 1382 000 620 1677 000 839 7930 508 843 5155 508 917 2150 730 999 2706 001 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... HEADER 3 CKT STRAIGHT . . . . . . . . . . . . *HDR 10C VERT 2ROW TOP LATCH . . . . . HDR, 10 PIN, PC BD . . . . . . . . . . . . . . . . . . *HDR 40C VERT 2ROW TOP LATCH . . . . . SHUNT JUMPER 0.1" CENTERS . . . . . . . . CONN, EDGECARD 44C 2 ROW . . . . . .
PAGE 136
612 0904 000. . . . . . . . . . JACK, PC MT GOLD PLATED . . . . . . . . . . . 6 620 0515 000. . . . . . . . . . RECP, SCREW ON SMC . . . . . . . . . . . . . . . 1 620 1677 000. . . . . . . . . . RECEPTACLE, PC MT, BNC . . . . . . . . . . . . 1 839 7930 515. . . . . . . . . . SCHEM, RF INTERFACE BD. . . . . . . . . . . . 0 843 5155 515. . . . . . . . . . PWB, RF INTERFACE BD. . . . . . . . . . . . . . . 1 999 2752 001. . . . . . . . . . HARDWARE LIST, RF INTERFC . . . . . . . . . 1 . . EA . . EA . . EA ....
PAGE 137
540 1386 000 540 1391 000 540 1443 000 540 1493 000 540 1496 000 540 1530 000 540 1600 101 540 1600 204 546 0295 000 548 2400 101 548 2400 269 548 2400 285 548 2400 301 548 2400 318 548 2400 351 548 2400 401 548 2400 418 548 2400 430 548 2400 534 548 2400 601 550 0961 000 574 0366 000 610 0900 000 610 0978 000 610 0981 000 610 1043 000 610 1107 000 610 1112 000 612 1184 000 ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ......... ....
PAGE 138
404 0675 000. . . . . . . . . . SOCKET, DIP, 16 PIN (DL). . . . . . . . . . . . . . 21 . EA 404 0767 000. . . . . . . . . . SOCKET, DIP, 20 PIN (DL). . . . . . . . . . . . . . 2 . . EA 516 0453 000. . . . . . . . . . CAP .1UF 100V 20% X7R. . . . . . . . . . . . . . . 8 . . EA 516 0792 000. . . . . . . . . . CAP NETWORK .1UF 10%. . . . . . . . . . . . . . 7 . . EA 522 0550 000. . . . . . . . . . CAP 100UF 25V 20% . . . . . . . . . . . . . . . . . . 1 . . EA 540 1356 000. . . . . . . . . .
PAGE 139
843 5523 971 . . . . . . . . . SCH, 3 FREQ SELECT . . . . . . . . . . . . . . . . 0 . . . . . 843 5523 973 . . . . . . . . . PWB, 3 FREQ SELECT . . . . . . . . . . . . . . . . 1 . . . . . Table 7-57. INSTALLATION KIT - 992 8642 002 (B) Harris PN 086 0001 001 302 0215 000 302 0320 000 310 0009 000 310 0011 000 314 0009 000 314 0011 000 464 0169 000 464 0246 000 614 0807 000 992 8179 001 992 8364 001 992 9266 004 ......... ......... ......... ......... ......... ......... ......... ......... ......... .....
PAGE 140
7-60 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 141
Section A Synthesizer Interface A.1 Introduction This section covers the Synthesizer Interface board(s). Topics include function, location, block diagram description, detailed circuit description, troubleshooting, and removal/replacement. NOTE: Parts List for this board is in Section VII. A.2 Function The function of the Synthesizer Interface board is to provide a variable frequency source of RF drive that can be remotely programmed.
PAGE 142
A.5.5 Power Supplies +22VDC is regulated down to +15VDC and +9VDC, and +8VDC is regulated to +5VDC for on board circuits. The Range 1 input is controlled by the SYNTH FAULT/BAND LOGIC PAL, U11. A.6.1.3 Power Supply Inputs A.5.6 Synthesizer SYNC Circuit The function of this circuit is to synchronize the Synthesizer Interface board RF output with an RF combiner current sample during any VSWR fault condition. This RF SYNC switching is controlled by the VSWR logic circuits on the Output Monitor board.
PAGE 143
A.6.3 SYNTH PAL The SYNTH PAL U11 has four main functions, Band Switch Logic, BCD to Binary Conversion, Digit Shifting, and Frequency Fault Detection. When the enable input on pin 1 is a logic low, the IC functions like a normal buffer. When the input is a logic high, all of the output pins are an open circuit. Refer to Figure A-1 for the following discussion. When a Low Band frequency has been selected, the Band Low output of the SYNTH PAL U11-22 will be a logic low: A.6.3.
PAGE 144
Figure A-2 A-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 145
b. The logic level of the Binary inputs to the Synthesizer is listed on the right side of the chart. NOTE - In Low Band operation, the Decimal Point follows the 3MSB so the Binary input is 1599.0 (100Hz Step Adjustment = 0) A.6.4.2 High Band Digit Shifting When a High Band frequency has been selected, the Band High output of the SYNTH PAL U11-21 will be a logic low: NOTE - All of the High Band Buffers are active and all of the Low Band Buffers are disconnected. a.
PAGE 146
A.6.12 Phase Adjustment After the RF is phase lead shifted, the RF is clamped to TTL levels by the diodes CR5 and CR10. The RF squarewave is inverted by U13-4 and connected to U18-6. Inverters U13-6 and U13-8 along with C30 and Q4 form a power-up reset circuit for U8. Q4 will allow the +5VB supply to come up for U8 only after the Synthesizer SYNC signal is present. A.6.12.1 Digital Phase Adjustment A.6.
PAGE 147
1. If the above checks appear correct, replace the Synthesizer module. A.7.3.2 RF Signal Present If an RF signal is present, sequentially check the following test points. a. TP5 SYNTH RF 1. If no RF signal is present, check jumpers JP1 and JP2 along with inverter U5-7. b. J4-8 Synthesizer RF Output 1. If no RF signal is present, check switch U14 and inverter U3-7. 2. If an RF signal is present, measure and troubleshoot the RF Output Detector voltages. A.7.3.3 RF Signal Wrong Frequency a.
PAGE 148
J4-8 J5-1 J3-1 A-8 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 149
Figure A-3. Synthesizer Interface Board Controls and Indicators 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 150
Figure A-4. Synthesizer Interface Board Component Locator A-10 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 151
Section B RF Interface B.1 Introduction B.3 Oscilloscope Waveform Plots This section covers the RF Interface board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, and removal\replacement. Actual oscilloscope waveform plots of key troubleshooting points are located at the end of this section. All plots were taken at 100 kW with no modulation at 540 kHz carrier frequency. NOTE: Parts List for this board is covered in Section VII. B.
PAGE 152
B.5.1 Synthesizer Interface Switching Normally, Synthesizer Interface A is selected for operation and a relay on the RF Interface supplies Sythesizer Interface A with +22VDC and +8VDC in addition to selecting the Sythesizer Interface A RF output. Optional Synthesizer Interface B, if installed, can be selected by switching the relay to the opposite position. B.5.2 Fault Sensing Fault sensing for the active Synthesizer Interface is accomplished by applying the Synthesizer Detector Output to a comparator.
PAGE 153
When TP11 goes low and U2-9 goes to +2.6VDC, the output of U2-14 goes LOW and TP6 is a logic low. A Synthesizer Fault-L is generated and sent to the Controller via the Transmitter Interface. Diode CR8 pulls up U2-11 to the +10VDC supply, so a fault can not be generated by U2-13 (Synthesizer Interface B Fault). B.6.4.2 Synthesizer Interface B Selected K1 is energized and 0VDC is applied to U2-8 to prevent U2-14 (Synthesizer Interface A Fault) from going logic low.
PAGE 154
it is the local control causing K1 to activate not a remote control input. 1. If active, refer to the Transmitter Interface section of the manual. 2. If not active, check U1 and/or CR3. B.7.3 Fault Sensing Begin Troubleshooting as follows: a. Check the state of TP6 (Synthesizer Fault). 1. If this is logic high, the transmitter should not display a fault on the front panel. 2. If a fault is displayed, refer to the Controller section of the manual for further troubleshooting. b.
PAGE 155
Figure B-2. RF Interface Controls and Indicators 888-2339-002 Warning: Disconnect primary power prior to servicing.
PAGE 156
Figure B-3. RF Interface Component Locator B-6 888-2339-002 Warning: Disconnect primary power prior to servicing.
PAGE 157
Section C Driver Combiner Motherboard (A5) C.1 Introduction C.4 Detailed Circuit Description This section describes the Driver Combiner Motherboard. Topics include function, location, detailed circuit description, troubleshooting, and removal/replacement. Refer to Driver Combiner Motherboard Schematic Diagram (839-7930- 504), and Figure C-1 Driver Combiner Motherboard for the following discussion.
PAGE 158
The Section A goes to a peak detector formed by CR3 and C9. When RF is present, J31-13 will have a positive voltage approximately 1/2 the peak-to-peak waveform. Zener diode CR4 limits the detectors’ maximum dc output voltage. The Section B detector is formed by CR5/C8, connected to J31-11, and protected by CR6. C.4.2 Predriver Connections - J2 C.4.2.1 RF Input C.4.2.5 Predriver RF Sense One of the unused RF feeds from the A46 Predriver Splitter is used to provide the Predriver RF sense sample.
PAGE 159
CAUTION THE TRANSMITTER MUST NOT BE OPERATED UNLESS THE COMBINER COVER IS IN PLACE AND ALL SCREWS HOLDING THE COVER TO THE GROUNDING BLOCKS ARE INSTALLED AND PROPERLY TIGHTENED. THE COMBINER COVER CARRIES MOST OF THE COMBINER RETURN CURRENTS. 5. If no Drive problem is found refer to the Driver Encoder Troubleshooting section to trace the lost turn on signal. d. If the amplifier has RF drive, control signal and supply voltage, inspect the motherboard for a bad connector, open trace or cracked toroid. C.5.
PAGE 160
WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. 2. If the supply is present check R20, on the Driver Combiner Motherboard, for an open. 3.
PAGE 161
C.6 Driver Combiner Motherboard Re- moval/Replacement C.6.1 Removal WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. a.
PAGE 162
Figure C-2. Driver Combiner MB - Component Locator C-6 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 163
C.7.5 Block Diagram Description C.7 Buffer Amplifier (A4) C.7.1 Introduction This section covers the Buffer Amplifier board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, and removal/replacement. NOTE: For more information about the RF Driver Section, refer to the Overall System Theory Section. NOTE: Parts List for this board is covered in Section VII. C.7.
PAGE 164
Since the two sections of the Buffer Amplifier Module are identical only Section A will be described here. driver B supply is present. All indicators are visible from the transmitter’s non-interlocked compartment. C.7.6.1 Buffer Amplifier C.7.7 Troubleshooting The Buffer Amplifier supply voltage will not be present when the transmitter is off. The first step in troubleshooting this board is to observe the red LEDs on the module during Step Start.
PAGE 165
1. Pull out the Buffer module and attach a clip lead onto the front end of R16. 2. Reinsert Buffer Module 3. Route the clip lead through the air holes in the inner door so the door can be closed. 4. Connect a scope probe to the clip lead, and turn on only the Low voltage. There should be a 4 to 4.5Vp-p RF signal present. 5. If not, then refer to the overall wiring diagram and Frequency Synthesizer Troubleshooting to trace the loss of signal. 6.
PAGE 166
C-10 P1-15 TP1 TP2 P1-49 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 167
Figure C-4. Buffer Amp Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 168
C.8 Predriver, PD1 C.8.1 Introduction This section describes the Predriver module. Topics include Function, Location, and Troubleshooting. NOTE: For more information about the RF Driver Section, refer to the Overall System Theory Section. NOTE: For detailed circuit description and troubleshooting refer to Section G, RF Amplifiers. C.8.2 Function The Predriver module, PD1, is used to amplify the Buffer Amplifier output and provide RF Drive to Drivers D1-D14.
PAGE 169
P1-50 Q7 Gate TP1 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 170
C.9 Drivers, D1 through D14 C.9.1 Introduction This section describes the Driver Amplifiers. Topics include, Function and Location. NOTE: For more information about the RF Driver Section, refer to the Overall System Theory Section and to the Driver Encoder. NOTE: For detailed circuit description and troubleshooting refer to Section G, RF Amplifiers. C.9.2 Function The Driver RF Amplifiers, D1 through D14 are used to amplify the Predriver output and provide RF Drive to all Big Step and Binary RF Amplifiers.
PAGE 171
Section D Predriver Tuning Board D.1 Introduction This section covers the Predriver Tuning board. Topics include function, location, detailed circuit description, troubleshooting, and removal\replacement. NOTE: Parts List for this board is covered in Section VII. D.2 Function The function of the Predriver Tuning board is to series tune the output of the Predriver amplifier to resonance through the frequency range of the transmitter.
PAGE 172
measured on the output pin of U1. If the relay is to be de-energized, the Bit input must be an open circuit and should therefore measure +24VDC. D.5.2 Relay Ohmmeter Testing Relays may be ohmmeter tested using a power supply, by applying +24VDC to the + pin 1 input and ground to the - pin 2 input. The relay should make a “clicking” sound when energizing. The contacts can also be checked for open/closed continuity. D.5.
PAGE 173
Figure D-1. Predriver Tuning Board Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 174
D-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 175
Section E Driver Encoder (A7) E.1 Introduction This section covers the Driver Encoder board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, removal/replacement, and alignment. NOTE: Parts List for this board is in Section VII. E.5.
PAGE 176
to Fault Sensing circuits. Both Buffer Amplifiers are continuously operating and normally Predriver A is selected for operation. Fault Sensing therefore monitors Buffer A output, until Predriver B is selected at which time Buffer B is monitored. Should the Buffer Amplifier sample being monitored not be present, a Buffer Fault will be sent to the Controller. The same DC voltages are applied to a Sample Buffer that provides a Buffer Sample for metering purposes.
PAGE 177
E.6.3.1 Driver D7 Control Whenever the +5VDC supply is present, the D7 output will be logic high. This Driver will always be turned on. E.6.3.2 Driver D8 - D10 Control Driver Level Inputs Bit 0 (LSB) and Bit 1 (MSB) from the Frequency Control Interface enter the board at J9. Both are connected to an Encoder inside the PAL and depending upon the input, control Drivers D8 - D10. When the output is a logic high, the Driver is turned on.
PAGE 178
the capacitor is charged, the PD_ON input will go back to a logic high and turn on the Predriver again. The High_D output of the other comparator is not being used in this configuration. E.6.5.3 Remote Predriver Select Transistor E.6.9.2 Low Drive Comparator Transistor Q3 is used as a switch that is in parallel with S5. When the Predriver Select - H input at J3 is logic high, Q3 will be turned on and Predriver B will be selected.
PAGE 179
A. Normally the voltage at the positive (+) input will be higher than the voltage at the negative (-) terminal, and the output of the comparator will be logic high. E.6.16.1 Divider If this dc voltage drops below the reference voltage, the output of the comparator will go logic low and a Buffer Fault - L will be sent to the Controller at J3. An RF MUTE will be applied to the transmitter. E.6.16.
PAGE 180
When U27-1 goes low, DS5 Power Supply A Overtemp will be illuminated RED, indicating a temperature warning. Comparator U2-1 will go high, turning on Q7 which sends a Power Supply Temp-L signal to the Controller. This will initiate a transmitter power FOLDBACK. Every four minutes that this line remains low, a further reduction in power will occur until the transmitter is turned off. E.6.22.
PAGE 181
E.6.23.1 Regulator Status In order to be able to have an on-board visual status indication of regulator operation, it is necessary to have a supply voltage on the board that does not depend on the regulated supplies. The +22VDC supply goes to CR9 and CR11 and +8VDC goes through CR12 to a 5 Volt regulator, U33. This +5 Volts is designated +5VB and can be measured at TP19. The +5VB is used as a reference to inputs of comparator U32 through a series voltage divider network.
PAGE 182
Start troubleshooting by checking to see which Power Supply Indicator DS5 or DS6 is illuminated. E.7.2.4 Power Supply A Overtemp If Power Supply Overtemp A indicator is illuminated, proceed as follows, a. Measure the voltage on TP11. Multiply this reading by 10 to obtain a temperature reading in degrees Centigrade. b. If this appears high or abnormal compared to the suspected actual temperature of the rectifier heatsinks, the sensor or U3 may be faulty. 1.
PAGE 183
1. If logic low, check U7-2. If also logic low check transistors and capacitors connected to the input. 2. If logic high, replace the PAL. b. If D0 is a logic high, then check the output at J1 for a -1.4VDC. 1. If J1 is +2.2VDC, replace the inverter driver. c. If Drivers D1 through D6 are not being turned on, check the D1 thorough D6 outputs of the PAL for a logic high. 1. If any outputs are logic low, replace the PAL. d. If D0 is a logic high, then check the output at J1 for a -1.4VDC. 1. If J1 is +2.
PAGE 184
CH1 J7-3 CH2 TP4 E-10 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 185
J7-5 Upper Trace - TP7 Lower Trace - TP6 NOTE - Taken During Turn-On Sequence High to Low Signal - Anode of CR3 Low to High Ramp Signal - TP6 NOTE - Taken During Turn-On Sequence Low to High Signal - J3-1 Low to High Ramp Signal - JP9-1 NOTE - Taken During Turn-On Sequence 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 186
Figure E-4. Driver Encoder Controls and Indicators E-12 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 187
Figure E-5. Driver Encoder Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 188
E-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 189
Section F RF Combiner Motherboards (A10-A19) F.1 Introduction This section describes the Main and Binary RF Combiner Motherboards. Topics include function, location, detailed circuit description, and removal/replacement. NOTE: For more information about the RF Combiner, refer to the Overall System Theory Section. NOTE: Parts List for this board is covered in Section VII, and RF Amplifiers are described in Section G. F.
PAGE 190
F.6 Troubleshooting Troubleshooting on the RF Combiner Motherboards consists essentially of visual inspection. Possible problem areas include: a. Inspect connectors carefully, including removing RF Amplifiers if necessary to inspect pc board edge connectors. b. Physically check connectors; plugs should be properly inserted into jacks or sockets. 1. Connectors loose. 2. Connector damage. NOTE Replacement edge connector sockets will have to be soldered in place. c. Damage to printed circuit traces. d.
PAGE 191
Figure F-1. Binary Combiner Motherboard (Front) Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 192
Figure F-2. Binary Combiner Motherboard (Rear) Component Locator F-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 193
Figure F-3. Efficiency Coil Board Component Locator Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 194
F-6 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 195
Section G RF Amplifier Module G.1 Introduction This section covers the RF Amplifier module. Topics include function, location, block diagram description, detailed circuit description, and troubleshooting. NOTE: Parts List for this board is covered in Section VII. G.2 Function The transmitter contains a total of 175 RF Amplifier modules.
PAGE 196
as determined by the function required. The following discussion applies to all RF Amplifiers, regardless of their location or use. G.4 Block Diagram Description The RF amplifier module is a Class D, Quad Bridged configuration. Refer to Figure G-1 for the following discussion. G.4.1 RF Flow G.4.1.1 RF Drive Two separate but identical RF drive sinewave signals (exactly equal in Phase and Amplitude), enter the module, and each is applied to an RF Transformer.
PAGE 197
transient voltages. Each of these diodes conducts if the voltage across them exceeds 20 Volts, either positive or negative. G.5.2 MOSFET Switches - Full Quad, Bridged Configuration Figure G-2 shows the four pairs of MOSFETs as switches. The phase of the RF drive signals is such that only two combinations are possible for the switches when the module is “ON”. During one half of the RF cycle (Figure G-2A), Q1/Q3 and Q6/Q8 are both driven to cutoff (open), while Q2/Q4 and Q5/Q7 are saturated (closed).
PAGE 198
circuitry. ON/OFF control signals (from the appropriate Mod Encoder) enter at P1-45 and P1-46. G.5.4.1 Module Turned “ON” A negative control signal input (about -2 to -5 Volts) will saturate PNP transistors Q11 and Q13, so they act essentially as a short circuit. NPN transistor Q9 will be cut-off and effectively an open circuit. A ground is therefore applied to the lower part of the two secondary windings of T1 and RF drive is then provided to Q5 and Q7 so they switch on when gate drive is positive.
PAGE 199
G.5.8 RF Drive Fuse Open Detector RF Drive passed by F3 will conduct through CR19 and charge C11 to about 20VDC. CR17 is therefore reversed biased and P1-35 remains at +15VDC. If F3 opens, the charge on C11 will be removed and 20K ohms of resistance will effectively be placed to ground through CR17 and R19. This will lower the voltage going to the Mod Encoder and is used to trip a fault comparator which lights the RF Amp Fuse LED on the Front Panel. The same operation applies to circuitry connected to F4.
PAGE 200
static charge will eventually have to be discharged. Discharging to the MOSFET could damage the MOSFET. process would then have to be repeated which can be very frustrating. NOTE Blowing a fuse on one half of the amplifier does not effect the other half of the amplifier. MOSFET transistors which are in circuit are immune to this damage. MOSFETs that appear to be undamaged after testing should be kept as spares for use if new replacements are not available.
PAGE 201
1. If the LED still does not light, check F3 and F4. 2. If the fuse(s) are open, check for a shorted T1, T2, C11 or C12. b. If the fuses are not open: 1. Verify the presence of RF drive on the RF Amplifier. Refer to Section VI, Troubleshooting paragraph title “Measuring RF Drive.” 2. It should be 22 to 25 Volts p-p with a negative DC offset. 3. If the RF Drive waveform has no DC offset (is centered on the 0VDC axis) that side is on, check Q9 and Q10 and DS3 for a short.
PAGE 202
connection can cause a drive phase problem on an RF module. Substitution is the only way to troubleshoot this problem. d. The only other cause of drain phasing problems on a module would be the MOSFETs themselves. Substitution is the only way to troubleshoot this problem. G.7.6 Excessive Drain Phase Difference a. Measure the drain phase on the RF Ampifier using the procedure provided in Section V. b. If a module is out of specifications on drain phasing, first substitute a new module. c.
PAGE 203
CH1 TP1 CH2 TP2 (230V p-p) P1-45 (RFA OFF) Junction of L11 and C17 (RFA OFF) 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 204
Figure G-7. RF Amp Component Locator G-10 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 205
Section H Output Monitor/Output Sample H.1 Introduction H.3 Oscilloscope Waveform Plots This section covers the Output Monitor board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, and removal/replacement. Actual oscilloscope waveform plots of key troubleshooting points are located at the end of this section. All plots were taken at 100 kW with no modulation at 585 kHz carrier frequency.
PAGE 206
H.5 Block Diagram Description amplifier which provides Forward/Reflected Power DC Samples for front panel metering. H.5.1 VSWR Detectors Two types of VSWR detectors are provided: Antenna and Network VSWR. The purpose of the Antenna VSWR detector is to sense an impedance change external to the transmitter. The Network VSWR detector is for sensing a problem within the output network.
PAGE 207
H.6.1 VSWR Detectors The Antenna VSWR Detector and the Network VSWR Detector operate on the same general principle, with a detector transformer and rectifiers responding to changes between two RF samples. Current and voltage samples are taken from the output network, and are matched in amplitude and phase, using various tuning and phase shift components. These two samples are then applied to the primary side of the detector transformer.
PAGE 208
ship between the voltage and current. This results in output from the detector circuit. The Antenna VSWR detector circuit is very similar to the Network VSWR circuit. However, the RF samples are taken near the output terminal of the transmitter by the Output Sample board. H.6.2 Frequency Selection There are 3 independent setups for the Antenna VSWR, Network VSWR, Forward Power, and Reflected Power. These 3 setups are used to satisfy the alignment for each of the 3 frequencies of operation.
PAGE 209
H.6.10 VSWR PAL This PAL contains resettable VSWR trip counters. H.6.10.1 Single VSWR Trip When the VSWR PAL U11 receives a single active high VSWR trip signal from either one-shot, it executes the following functions: a. The 4 Second Timer Request output will go logic high and start the 4 Second Timer. The 4 Second Timer output will go logic high, and is connected back into the PAL. b. During the 4 Second long Timeout, the Blink output is logic high, and the VSWR Test Status and J6-9 is logic low.
PAGE 210
which trips the comparator thereby simulating a VSWR condition. Upon transmitter foldback to extremely low power levels, these switches have no effect because the samples have been lowered enough not to trip the detectors. H.6.13 VSWR Inhibit Push-button switch S21 shunts the inputs of the VSWR Comparators to ground through diodes. This keeps the VSWR Comparators from being able to detect a VSWR fault. It should only be used when testing the VSWR Self Test. H.6.
PAGE 211
NOTE In the Bypass mode, the tap on the coil should be adjusted for the desired level of RF sample at the highest power level (normally 100 kW). Failure to do so might result in external monitoring equipment damage. The modulation monitor should provide a 50-Ohm termination for the mod monitor sample output. It may be necessary to use a 50-Ohm termination at the monitor to meet this requirement. H.6.17 Audio Demodulator The primary of transformer T2 is also connected to the modulation monitor sample at J4.
PAGE 212
2. If the fuse is not open, measure the input TP for the unregulated voltage. 3. If the unregulated input is correct, replace the regulator. d. If all supplies measure correct: 1. Check TP40 for +5VDC and replace U28 if necessary. 2. If TP40 is okay, measure the voltages on the comparator inputs and outputs to determine if the comparator is faulty. H.7.
PAGE 213
H.7.4 Power Metering H.7.4.1 Forward Power a. Check for a dc voltage at U9-5 with carrier only. This voltage should change as the power is raised or lowered. b. If there is no DC or the level does not change, check CR41 anode for an RF signal. 1. If there is no RF signal refer to the Overall wiring diagram to trace the loss of signal. 2. If there is RF on CR41, check CR41, the other input diodes, and U9. H.7.4.2 Reflected Power a. Turn off the transmitter and put P4 and P5 in the Cal position. b.
PAGE 214
H.9.4 AGC a. With the transmitter operating at 100kW, adjust R172 AGC for 6Vp-p of RF at J4. H.9.5 Forward and Reflected Power Null Adjust- ments a. With the transmitter operating at 440 to 460A of PA Current, select the Reflected power position on the front panel meter. b. Adjust the Reflected Balance capacitor for each frequency, on the Output Monitor to null the meter indication to zero. C56 should be used for frequency 1, C57 for frequency 2, and C58 for frequency 3. c.
PAGE 215
H.10 Output Sample Board Output Monitor board via J1, and will be used for the Forward Power meter reading. H.14.2.2 Reflected Voltage Sample H.11 Introduction This Section describes the Output Sample board. Topics include function, location, detailed circuit description, troubleshooting, and removal/replacement. The Reflected Voltage Sample is taken from a capacitive divider made up of capacitors, C7, C13, C10 and C16.
PAGE 216
H-12 CH1 TP3 CH2 TP2 CH1 TP6 CH2 TP5 CH1 J1-15 CH2 J1-5 CH1 J1-13 CH2 J1-3 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 217
CH1 J4 CH2 TP22 02/17/04 CH1 J6-33 CH2 J6-31 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 218
Figure H-4. Output Monitor Component Locator H-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 219
Figure H-5. Output Sample Component Locator 02/17/04 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 220
Figure H-6. VSWR Compensation Component Locator H-16 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 221
Section J Analog Input Board J.1 Introduction J.4 Oscilloscope Waveform Plots This section describes the Analog Input board. Topics include Function, Location, Block Diagram Description, Detailed Circuit Description, Troubleshooting, and Removal/Replacement and Oscilloscope plots of key points. Actual oscilloscope waveform plots of key troubleshooting points are located at the end of this section.
PAGE 222
Power control attenuates or increases the (Audio + DC) signal to provide High, Medium and Low power output. Refer to the Installation Section for determining the proper termination. Fine Power Control will raise or lower the (Audio + DC) by plus or minus 10% of the current power level. J.6.1.
PAGE 223
adjustable gain control R143 Low Frequency THD Null, this control is adjusted to improve low frequency distortion. The outputs of the DC amplifier and the AC amplifier are combined and applied to U27-13. A current limit voltage is also added to U27-13 and will be discussed later. U27-14 is a buffer amplifier, its output is the correction voltage and goes to input X1 of multiplexer U16.
PAGE 224
through DB7 (MSB) on the input pins U18-11 through U18-4 that comes from the Trim PALS. When S1 is in the calibrate position and the unmodulated power output is set to 100 kW, the voltage U4-7 is 1.47VDC and U4-6 is - .64VDC. If S1 is returned to the Normal position and the Raise control is depressed and held until the power output is 110 kW, the voltage at U4-7 is 1.54VDC and U7-7 is -1.28VDC. If the Lower control is depressed and held until the power output is 90 kW, the voltage at U4-7 is 1.
PAGE 225
J.6.11 Dither Circuits The Dither signal optimizes noise performance in the transmitter by introducing a small 72 kHz triangle wave on the -(Audio + DC) signal J.6.11.1 Dither Oscillator The Dither Oscillator is made up of an integrator U9-8 and a square wave generator U9-1. The output of the Dither Oscillator at U9-8 is a triangle wave with an amplitude of 1 Vp-p. Dither Frequency Adjust, R19, sets the Dither frequency to a nominal 72 kHz.
PAGE 226
One is an RF MUTE at the collector of Q2 to turn all Big Step and Binary RF Amplifiers off. The other is a Supply Fault, when Q1 turns on, which shuts the transmitter OFF. J.7 Troubleshooting J.7.1 Power Supply If an Analog Input supply fault is displayed on the Control front panel, then with only the low voltage on, check the LED indicators on the Analog Input board: a. DS1 (+5V) b. DS2 (-15V) c. DS3 (+15V) Each of these LED indicators should be Lit, if the individual supplies are operating normally. J.
PAGE 227
c. If these voltages are correct a true Supply Fault exists. Refer to the Transmitter Troubleshooting Section to locate the Supply fault. g. If present, refer to the overall wiring diagram to trace the missing correction voltage. Note J.7.5.1.2 RF Amp Supply Fault Returns a. If the fault returns and the Supply current meter does not deflect upward, start troubleshooting by checking the voltage on TP30 of the analog input board. b.
PAGE 228
J.7.6.4 Modulated B- If a Modulated B- problem occurs, use the plots and voltages from another Encoder to determine where the differences are. Also, verify the proper B- voltage from the test data sheets. J.8 Removal and Replacement Remove the 8 screws and 4 connectors from the board. When installing a replacement board, before operating the transmitter perform the Alignment for this board listed in this section of the manual. J.9.1 Audio Gain J.9.1.
PAGE 229
J.9.9 Peak And Average Current Overload a. Turn the Average current overload R17 fully CW. b. Preset the Peak current overload R113 for 9.5VDC measured at TP23. c. Operate the transmitter at 100kW and modulate with a 20Hz sinewave at 100% negative peaks. d. Increase the audio level by 1.4 dB, PA current should be between 750 and 850 A. e. Adjust the Peak current overload R113 until the current limit LED DS5 just begins to illuminate RED with modulation. f. Reset the audio for 100% negative peaks. g.
PAGE 230
J-10 TP12 TP15 TP11 TP5 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 231
TP16 TP1 TP7 TP27 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 232
J-12 U10-7 U10-1 TP31 TP32 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 233
TP25 TP2 TP9 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 234
J-14 Upper Trace - CH1 - TP28 Lower Trace - CH2 - TP2 NOTE - 100Hz 95% Modulation 100kW Upper Trace - CH1 - TP31 Lower Trace - CH2 - TP32 NOTE - 100Hz 95% Modulation 100kW Upper Trace - CH1 - TP28 Lower Trace - CH2 - TP2 NOTE - 30Hz 95% Modulation 100kW Upper Trace - CH1 - TP31 Lower Trace - CH2 - TP32 NOTE - 30Hz 95% Modulation 100kW 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 235
Figure J-2. Analog Input Controls and Indicators 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 236
Figure J-3. Analog Input Component Locator J-16 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 237
Section K Analog To Digital Converter K.1 Introduction This section describes the Analog to Digital Converter board, and includes Function, Location, Block Diagram Description, troubleshooting information and oscilloscope plots of key points. NOTE: Parts List for this board is in Section VII. Reconstructed Audio signals, for use in other sections of the transmitter, are also generated by circuits on this board. K.
PAGE 238
buffer amplifier goes to a Carrier Detector and the A/D PAL. The Divider is not being used in this application. The Carrier Detector will send a fault signal to the A/D PAL should no RF signal be present. K.4.2 (Audio + DC) Flow The (Audio + DC) signal from the Analog Input is buffered by a Buffer amplifier and sent to the A/D Converter.
PAGE 239
pin 8 is the most significant bit (MSB). Pin 9 is a DATA READY TTL logic output. K.5.3 Data Latches The digital Data Latches store the digitized audio information while the A/D converter is performing the next conversion. When the next conversion is completed, the LOAD OUTPUT signal from the TIMFLT PAL clocks the data latches and stores the new digital audio information. U6 stores the 6 most significant bits (MSB’s), and U7 stores the 6 least significant bits (LSB’s).
PAGE 240
the regulator is operational. The output of the regulators are transient protected by tranzorbs CR17, CR19, CR16 AND CR18. In order to be able to have an on-board visual status indication of regulator operation, it is necessary to have a supply voltage on the board that does not depend on the regulated supplies. The +22 and +8 volt supplies go through diodes CR21 and CR22 to regulator U26. The supply will be active if either F1 or F3 opens.
PAGE 241
A/D Timing Sequence 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 242
the A/D board. This will display an RF MUTE, A/D Supply Fault and Conversion Error on the Control front panel when the transmitter is turned on. K.6.4.1 Transmitter goes to maximum power (All RF AMPS on) a. Check the A/D input meter on the Transmitter Multimeter located in the Right PA compartment. b. Compare this to the normal reading from the Factory test data or station log. c. If this is not correct, check for the (Audio + DC) signal at TP22. d. If this signal is correct check U1, CR1, CR2, and U14.
PAGE 243
TP22 U3-22 TP1 J3-1 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 244
K-8 TP4 U12-7 TP19 U15-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 245
U18-6 U16-6 Upper Trace - CH2 - TP22 Lower Trace - CH1 - TP21 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 246
Figure K-2. Analog to Digital Converter Component Locator K-10 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 247
Section L Modulation Encoders (A25-A29) L.1 Introduction L.4 Big Step Modulation Encoders This section describes the Big Step Modulation Encoder and the Binary Encoder boards. Topics include Function, Location, Block Diagram Description, Detailed Circuit Description, Troubleshooting, and Removal/Replacement. L.4.1 Block Diagram Description Refer to Figure L-1 Modulation Encoder block diagram for the following discussion. NOTE: Parts List for this board is in Section VII. L.4.1.1 Digital Audio Flow L.
PAGE 248
Figure L-1. Mod Encoder, Simplified Block Diagram L-2 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 249
Modulated B- Drive from the Analog Input board feeds a Balanced To Unbalanced Amplifier that drives the B- Regulator and the B- Fault Tracking circuit. The output B- voltage from the B- Regulator varies with modulation and passes through Output Protection and is applied to the Normal Mode jumper. Since the B- signal is constantly changing, the B- Fault Tracking circuit provides a reference for the Output Fault Sense. L.4.1.4.
PAGE 250
mounted on RF1 is connected to the Temperature Sensor Input and fed to the Temperature Detector. The outputs of the latches go to Encoder Output Drivers, which provide turn-on/turn-off signals for Big Step RF Amplifiers. Similar to the Air Flow Detector, the Temperature Detector can generate a TX Foldback and TX OFF if the temperature reaches certain levels. A logic high on any output will turn on the associated RF Amp. A logic low turns the RF Amp off. L.4.1.
PAGE 251
(depending upon the Modulated B- Voltage) and the RF Amp is turned ON. Connectors J1, J2, J3, and J4 carry the signal to the Big Step Combiner Motherboards where it is distributed to each RF Amp. L.4.2.6 FLEXPatch™ - Programmable RF Amp Selector A Programmable RF Amplifier is assigned to each Mod Encoder, therefore there are a total of five available in the transmitter.
PAGE 252
When the incoming eight bit digital word from U16 matches the programmed eight bit digital word, U4-19 goes low. to any on board indicator. A Cable Interlock Fault will not allow the transmitter to be turned ON until the fault is cleared. The anode of CR2 is grounded and a voltage divider applies +3VDC to the base of Q1. There are 4 interlock circuits on each Mod Encoder, each interlock circuit monitors 8 RF Amplifier modules. This saturates the transistor and the collector is pulled high.
PAGE 253
The cable interlock function is provided by two series connections. When all the RF Amps and Mod encoder cables are properly connected, a closed circuit is established from J1-9 to J1-10 (by four RF Amps and one cable) and from J1-20 to J1-19 (by four RF Amps and one cable). This pulls U34-11 lower than U34-10, which causes U34-13 to go low, causing the same transmitter action as explained in the previous paragraphs. L.4.2.11.
PAGE 254
L.4.2.12.2 External Air Flow Monitor Refer to the schematic diagram for the Air Flow Monitor (8397930- 022) for the following discussion. Operation of this monitor is exactly the same as the onboard monitor, except for the added cable interlock. The 10 conductor ribbon cable from J1 on the Air Flow Monitor is connected to J9 pins 1 through 10. J9 is a 20 pin jack. This supplies the monitor with +5VDC at J9-3 and B+ voltage at J9-1. The Air Flow In voltage from the monitor at J9-5 can be measured at TP29.
PAGE 255
Approximate Modulated B- Supply Output Voltages L.4.2.16 Modulated B- Voltage L.4.2.16.3 The Modulated B- Supply provides a negative voltage to the Encoder Output Drivers, which varies with the transmitter’s audio input and power level. At an operating power of 100 kilowatts and with 1kHz 100% modulation, the instantaneous Modulated B- voltage should vary between roughly -3 and -7.5 Volts. The effect of the modulated B- voltage is to control RF Amp turnon/turn-off times.
PAGE 256
Sense comparators will generate an Encoder Supply Fault-L that will turn the transmitter OFF. L.4.2.18.1 +5VDC Regulators The Mod Encoder uses two +5VDC supplies, +5VA and +5VB. The +5VA supply is used to power all the digital audio circuits. B+ Comparator U37-2 is the B+ fault comparator. A resistive voltage divider formed by R128 and R20-8 supplies one-half the B+ voltage to the + input U37-5. A similar voltage divider establishes the 2.8VDC threshold on the - input U27-4.
PAGE 257
WARNING ENSURE THAT THE TRANSMITTER IS TURNED OFF AND ALL PRIMARY POWER IS TURNED OFF AT THE WALL DISCONNECT SWITCH BEFORE OPENING ANY DOOR OR PANEL. BEFORE REMOVING PANELS OR OPENING DOORS, VERIFY THAT THE RF AMP POWER SUPPLY IS DISCHARGED BY CHECKING “PA+VDC” ON THE FRONT PANEL MULTIMETER. USE A VOLTMETER TO VERIFY THE POWER SUPPLIES HAVE BEEN DISCHARGED PRIOR TO TOUCHING ANY COMPONENTS. a. Start by ensuring that the RF modules are firmly inserted in the Combiner Motherboard. b.
PAGE 258
L.4.3.3.6 Supply Regulators If the Encoder section of the Control front panel displays a supply fault begin troubleshooting by: a. Observing if the indicators DS12, DS13 and DS14 are illuminated on each Mod Encoder board with CB3 on the Power Supply Display panel in the STANDBY position. b. If all these indicators are illuminated, turn on the transmitter and monitor DS9 on each board for a flash that would indicate the board generating the supply fault. c.
PAGE 259
f. If the low is present verify that an RF mute has not been selected by the Controller or Remote control. g. If no RF mute is being given then suspect one of the IC Latches is pulling the line low. The latches can be removed one at a time to locate the failed one. L.4.3.5.2 One or Scattered Amps With No Turn On a. First verify that the amp is not at fault by moving the module to another compartment. b.
PAGE 260
L.5 Binary Modulation Encoder (A25) L.5.1 Introduction This section describes the Binary Modulation Encoder board. Topics include Function, Location, Block Diagram Description, and Detailed Circuit Description. NOTE: Parts List for this board is in Section VII. L.5.2 Function A25 controls the Big Steps RF125-RF151/RF156, Binary Amplifiers B9-B12 and monitors the Air Flow in the right PA compartment. L.5.3 Location Mod Encoder A25 is located in the right PA compartment (SEE VIEW 10). L.5.
PAGE 261
move the RF Amp in Step 156 to the faulty Binary location. Then place the failed RF Amp in the Step 156 location. TP11 TP11 (50kW) TP11 (10kW) Upper Trace CH1 U37-11 Lower Trace CH2 U37-10 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 262
Figure L-4. Modulation Encoder Controls and Indicators L-16 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 263
Figure L-5. Modulation Encoder Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 264
Figure L-6. Airflow Monitor Component Locator L-18 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 265
Section M Controller (A31) M.1 Introduction This section describes the Controller board. Topics include Function, Location, Block Diagram Description, Detailed Circuit Description, Troubleshooting, and Removal/Replacement. NOTE: Parts List for this board is on Section VII. M.
PAGE 266
the original fault is of short duration or no longer present, the transmitter can recover in steps back to the original power. If the transmitter is at maximum foldback, and another power reduction is requested, then the transmitter will be shut off. that no inhibitive faults are present. Conversely, loss of ENTOR recoverably faults the transmitter OFF. A/C RESTART FAULT (FACR) FLT1 is the source of the FLT Master Reset that is connected to most PALs.
PAGE 267
M.5 Detailed Circuit Description Refer to the Controller Schematic Diagram (839-7930-021), for the following discussion. Refer to other Simplified Diagrams as requested. NOTE On all Simplified Diagrams if a bar is placed over the top of the input or output mnemonics, this designates the function as an active low signal. When the signal is low, the function is activated. If no bar is placed over the top of the mnemonic, the function is an active high signal.
PAGE 268
Error (OPR.ERR) output will go low illuminating the OPR PAL Fault Indicator DS3 RED. On the LR PAL, both the Priority Select and the Detect Any Change circuits are reset and the Lower Raise Error (LR.ERR) will go low illuminating the LR PAL Fault Indicator DS2 RED. M.5.2 PWR and PTIM PALs Refer to Figure M-5, PWR and PTIM PALs. M.5.2.1 Turn On Request The Turn On Request from the LR PAL is used to start the Step-Start Sequence.
PAGE 269
response to the fault. Each category has PAL(s) assigned to handle the fault type. M.5.5 RF Mute - FGATE1 PAL Faults that require the power output to be set to zero, but not to turn the transmitter OFF are applied to FGATE 1 (Fault Gate 1). Fault Input Latches and Fault Clock 1 is connected to the Transmitter Interface at J7-19 where it is sent to the VSWR PAL on the Output Monitor board. M.5.
PAGE 270
If the VSWR PAL on the Output Monitor receives five Antenna VSWR pulses within a 20 second period, the OM.AV.X line will go low for 250 uS. The Up pulse will start the 4 Minute Recovery Timer in the FBTIM PAL, which will sent a UPTIM (Up Timing) back to the Recovery Controller. The Foldback Controller will immediately (within 250 uS) Foldback the power -.5dB.
PAGE 271
M.5.6.5 Temperature Recovery M.5.6.9 Foldback Limit The Recovery process for the Overtemperature Fault is the same as for VSWR Recovery. If the maximum amount of Foldback is not enough to protect the transmitter during VSWR and Over Temperature faults, the Foldback Limit output that is sent to the FLT 1 PAL will go high and turn the transmitter OFF. The following chart lists the Recovery levels for the Over Temperature fault. ATTEN 0dB .5dB 1dB 2dB 3dB 6dB 10dB 12dB MINIMUM TIME M.5.6.
PAGE 272
M.5.7.4 Fault Enables During the Step Start Sequence when most transmitter circuits have not yet reached their steady state condition, some fault inputs must be ignored. The FTIM (Fault Timing) PAL gives the timing sequence of events for the FLT1 PAL. TAC and TOV are timeout signals for FACR and FOVR recovery respectively. These signals are sent back to the FLT1 PAL to indicate fault timeouts.
PAGE 273
The outputs will remain in this state, until the FOVR input goes back high. When the input does go back high, the OV1 output will go high. M.5.8.6 LED Enable When both OV0 and OV1 outputs are high, the 160mS Overload Restart Timer is started and 160mS later the TOV output will go high for 250 uS. KLVX Supply Low Voltage Sensing and C.UL Controller Unregulated Loss provide status of low voltage supplies. Both must be high for these indicators to be illuminated.
PAGE 274
The I.EXT.A input from FGATE 2 PAL can be jumpered P50 2-3 for a latched fault or 2-1 for a unlatched fault. This is the only fault in the transmitter that is programmable. generated. It can be measured at TP17 Supply Fault and provides a visual indication on the Control front panel only. M.5.15.5 Backup Capacitor M.5.13 Fault LED Latching Outputs from the Fault LED Latching circuits are connected to the LED board on the odd numbered pins of J2 and J12.
PAGE 275
M.5.16.2 LED Inhibit When the C.UL input at U36-4 goes low, the LED INH output of U36-2 will go high. The LED Inhibit will disable the PAL Fault Indicators. position, Remote Control line is high and active. When in the Local position, Remote Control line is low and inactive. If P52 is jumpered 3-4, Remote Control is always active. If P52 is jumpered 1-2, Remote Control is always inactive. M.5.16.
PAGE 276
c. The high input at the LR PAL U6-3 (High) will generate a high Turn-On Request at U6-21 (TOR) as long as U6-13 (ENTOR)is high. 1. The ENTOR (Enable Turn-On Request) comes from the FLT1 PAL U3-21. It must be high for the LR PAL to generate a TOR. 2. The VSWR Test output at U6-18 will go high for 8mS, this turns on Q1 and J7-9 VSWR Self Test Request goes low. This low signal is sent to the Output Monitor for testing the VSWR detectors. d.
PAGE 277
Figure M-1. Power Control Block Diagram 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 278
Figure M-2. Fault Handling Block Diagram M-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 279
Figure M-3. Power Supplies and Monitoring 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 280
Figure M-4. LR and OPR PALs M-16 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 281
Figure M-5. PWR and PTIM PALs 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 282
Figure M-6. FGATE 1 and FGATE 2 PALs M-18 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 283
Figure M-7. FLDBK and FBTIM PALs 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 284
Figure M-8. FLT 1 and FTIM PALs M-20 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 285
Figure M-9. LATCH PAL 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 286
Figure M-10. Step-Start Sequence Timing Diagram M-22 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 287
Table M-2.
PAGE 288
that supply. If open, check the input capacitors and the regulator before replacing the fuse. If both indicators are illuminated the fault sensing circuitry has failed. Suspect U36 and associated components to locate the fault. M.6.1.2 All PAL Fault Indicators Are Illuminated RED This symptom could be caused by either an External or Door Interlock. In either case, the transmitter can not be turned on. Begin by measuring the fault input on the appropriate Fault Input Latch.
PAGE 289
M.7 Removal and Replacement Remove the mounting screws and unplug all cables. In replacing the board, verify that P50, P52 and P53 are in the correct position. M.8 Alignments There are no alignments on this board. M.9 LED Board M.9.1 Introduction This section describes the LED board, and includes circuit functions and descriptions, and maintenance and troubleshooting information. NOTE: Parts List for this board is in Section VII. M.9.
PAGE 290
M.10.2 Function Components mounted on the Switch Board/Meter Panel include the transmitter’s on/off and raise/lower control pushbutton switches and status indicators, forward/reflected power metering and calibration, 230VDC power supply voltage metering and calibration control, 230VDC power supply current metering, and protective diodes and bypass capacitors for the meters. M.10.4.4 Multimeter M1 M.10.3 Location The Switch Board/Meter Panel is located on the back side of the center cabinet’s front door.
PAGE 291
Figure M-11. Controller Controls and Indicators 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 292
Figure M-12. Controller Component Locator M-28 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 293
Figure M-13. LED Display Board Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 294
Figure M-14. Switch Bd/Meter Panel Component Locator M-30 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 295
Section N External Interface (A23) N.1 Introduction This section describes the External Interface board. Topics include function, location, detailed circuit description, troubleshooting, and removal/replacement. NOTE: Parts List for this board is covered in Section VII. N.2 Function The External Interface board receives Remote Control Inputs and provides Remote Status and Metering Outputs. It also contains the Audio Input Connections and the External Interlock circuit. N.
PAGE 296
FORWARD POWER, SUPPLY VOLTAGE and SUPPLY CURRENT outputs will be between 2 and 4 VDC under normal operating conditions. REFLECTED POWER, ANTENNA NULL and NETWORK NULL outputs should be near 0 VDC and will increase as corresponding front panel meter readings increase. NOTE: Refer to the Installation Section for Typical Remote Metering applications. N.4.3.
PAGE 297
Figure N-3. Voltage Switching Figure N-4. Remote Control for Ground Switching Figure N-5. Remote Control for Voltage Switching 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 298
For EXT 2 and 4, a maximum voltage of +15 VDC can provide a full scale on the front panel multimeter. N.5 Troubleshooting Inputs to the operational amplifiers are through terminal board TB1. The outputs at J8 are sent to the front panel multimeter switch and “D” connector J2 provides remote External Metering outputs. N.5.1 Remote Control Input(s) Do Not Operate a. If +15VDC from J4-18 or +5VDC from J6-18 is used, check for presence of this voltage. b.
PAGE 299
N.5.3 Incorrect Remote Metering Each analog voltage to the monitor output terminals is buffered by a voltage follower. Measure the +15 and -15VDC supplies, and check output zener diodes. Failure of the zener diode might result in low or no output from the op amp. the connectors are numbered and keyed to aid in making the connections. N.6 Removal and Replacement N.7 Alignments Remove the cable connectors going to this board. Then remove the mounting screws to remove the board from the transmitter.
PAGE 300
Figure N-6. External Interface Controls & Indicators N-6 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 301
Figure N-7. External Interface Component Locator 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 302
N-8 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 303
Section P Transmitter Interface P.1 Introduction This section describes the Transmitter Interface board. Topics include function, location, detailed circuit description, troubleshooting, and removal/replacement. NOTE - Parts List for this board is covered in Section VII. P.2 Function The primary function of the Transmitter Interface board is to act as a tie point for inputs/outputs to and from the Controller board, to the rest of the transmitter.
PAGE 304
P.4.4 Interlocks The transmitter contains dual contact interlock switches on all rear doors and on the inner front doors. One set of contacts is used for the Door Interlock and the other is used for the Control Chain Interlock. If any of the eight hinged doors are opened both interlock strings will be broken and the transmitter will be shut OFF. NOTE The Power Supply Access Interlock is not used in single transmitter operation. P.4.4.
PAGE 305
supplied to J10-29 on the Transmitter Interface. This voltage is sent out on J7-1 to the three inner front door interlocks. If all the front inner doors are closed the voltage returns to the Transmitter Interface board on J7-2. This voltage is sent back out on J7-4 to the five rear interlocks. If all the doors and ground stick switches are closed the voltage is connected to the anodes of the solid state relays K3 and K4.
PAGE 306
P.6 Removal and Replacement P.7 Alignments Remove the 24 cable connectors going to this board. Then remove the 8 mounting screws to remove the board from the transmitter. Reverse the above order when replacing the board. Note that the connectors are numbered and keyed to aid in making the connections. Note all jumper positions and verify the replacement board is properly jumpered. There are no alignments needed on this board; however, ensure that P1 is in the proper position.
PAGE 307
Figure P-3. Transmitter Interface Controls and Indicators 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 308
Figure P-4. Transmitter Interface Componet Locator P-6 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 309
Section Q Frequency Control Board Q.1 Introduction This section covers the Frequency Control board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, removal/replacement, and alignments. NOTE: Parts List for this board is in Section VII. Q.2 Function The Frequency Control board is basically a control, metering, and status panel for the three frequency transmitter.
PAGE 310
Selector switches are changed. The Antenna VSWR Null switches are active and can be used to null the front panel meter position if required. Q.5.2.2 TUNE And LOAD Multimeters The LOAD Multimeter is turned off. If the Tune Meter Select switch is in the Normal position, the TUNE Multimeter is also turned off. If the Tune Meter Select switch is in the Multimeter position, the TUNE Multimeter is turned on and can measure up to 12 meter sample inputs. Q.5.2.
PAGE 311
Q.5.4.3 Servo Meter Select Switch When the Servo Meter Select push-button switch S3 is in the Normal relaxed position, a logic high is supplied to U3-13. This input is connected to the MTR Ref output at U3-16, which causes the Tune and Load Multimeters to monitor tune servo parameters depending upon the mode of operation. When S2 is depressed to the Ref position, the logic low input/output signal causes the Tune and Load Multimeters to switch to the servo Reference voltage, regardless of the mode selected.
PAGE 312
If a frequency of 936 kHz was entered on the front panel, the transmitter will be in Band 40, and the 6 Bit outputs from the BAND ENC PAL will be as seen below. BCD INPUT 6 BIT OUTPUT BAND 0 MSD1 1 MSD2 0 MSD4 0 MSD8 0 Bit 5 1 MSB 2MSD1 0 Bit 4 0 2MSD2 1 Bit 3 1 2MSD4 1 Bit 2 0 2MSD8 0 Bit 1 0 3MSD1 0 Bit 0 0 LSB 3MSD2 0 3MSD4 0 3MSD8 0 If a frequency of 585 kHz was entered on the front panel, the transmitter will be in Band 60, and all 6 Bit outputs from the BAND ENC PAL will be logic high.
PAGE 313
Q.5.11 TUNE Multimeter Since the multimeter is a full range meter, the TUNE Multimeter also provides a second function as a Multimeter for other meter samples. go logic low and generate a Supply Fault at J2-9. It is sent to the Frequency Control Interface board and will generate an RF MUTE. Q.5.11.1 Relay Switch Relay switch K1 is shown with S2 in the Tune Meter Normal position. Transistor Q2 is cutoff, K1 is de-energized, and the contacts are in the position drawn.
PAGE 314
2. If fuse is not open, measure input TP for the unregulated voltage. 3. If the unregulated input is correct, replace the regulator. d. If DS16 is illuminated RED: e. Use the Multimeter to measure the +5VDC power supply. f. If the supply has been reduced to less than 80% of normal: 1. Check the input fuse and replace if necessary. 2. If the fuse is not open, measure input TP for the unregulated voltage. 3. If the unregulated input is correct, replace the regulator. g. If all supplies measure correct: 1.
PAGE 315
Figure Q-3. Frequency Control Board Controls and Indicators 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 316
Figure Q-4. Frequency Control Board Component Locator Q-8 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 317
Section R Frequency Control Interface R.4.2.2 Driver Encoder Band Encoder R.1 Introduction This section covers the Frequency Synthesizer Interface board. Topics include function, location, block diagram description, detailed circuit description, troubleshooting, and removal/replacement, and alignment. NOTE: Parts List for this board is in Section VII. The output of the Encoder is used to encode the A/D Phasing, A/D Frequency, and Driver Level signals for the Driver Encoder board. R.4.2.
PAGE 318
R.4.3.2 Servo Amp The Servo Amp is a single device that will compare the reference voltage with the Servo Feedback Position voltage. If there is a difference in the two voltages, the Servo Amp will produce sufficient Motor Output Drive current to drive the servo motor to the correct position. R.4.3.3 Servo Fault Detector This circuit will compare the Reference voltage with the Position voltage and produce a Fault output if the two voltages are not within an acceptable range.
PAGE 319
R.5.3 Transmitter Control/Fault Logic PAL The function of this PAL is to control the transmitter mode depending on the frequency control mode. The transmitter should be shut OFF when the frequency is changed and major component values are switched. The transmitter must be operated at LOW and HIGH power during the initial tune up stage in changing frequency. The fault logic section also determines what action to take when a fault occurs in the frequency change circuitry.
PAGE 320
To do this a programmable device PAL is used for flexibility. This programmable device can therefore be changed easily without circuit board changes. R.5.5 Relay Encoding Example NOTE Refer to the Transmitter Band Chart, for the following examples. Refer to Figure R-1 PAL Encoder for the following example. For example, if the Frequency Band is 36 (1000 kHz transmitter frequency) and the Encoder is for the Driver Relay Drive, the Driver Band is 17.
PAGE 321
When the Bit output of the PAL is logic high, the corresponding MOSFET switch is turned on and the relay will be energized. NOTE The Truth Table on the schematic lists the Turns In Use per each Band. R.5.8.3 1C1 Band Switching The series capacitance at the ground end of the combiner is used to resonate with the combiner inductance to reduce the peak voltage on the combiner pipe. Capacitors C2, C3, C49 and C50 are in parallel with a group of 5 fixed capacitors.
PAGE 322
R.5.14.1 Driver Tuning The Driver Combiner pipe is tuned to series resonance by the Driver Tuning Assembly. A binary combination of inductor L1 through L6 and capacitors C1 though C6 are switched by vacuum relays K1 through K5. The Driver tuning is a 5 bit signal that breaks the frequency range into 31 bands. R.5.14.2 Driver Level The Bit 0 output is a 2 band output for switching the toroid T1 via K1 into the boost (de-energized)/no boost (energized) connections. R.5.
PAGE 323
returns, the counter will reset to 00000000 respectively, and the servo will return to the lower limit. The output of the Digital Comparator will generate a Servo Fault that applies an RF Mute to the transmitter when manually turned on again. The Servo Fault in conjunction with the A/C Mains Fault will alert station personnel to go the Frequency Change mode to reset the reference voltage for the selected frequency. When in the Normal Mode, the reference voltage can not be changed. R.5.22.
PAGE 324
of servo faults would include mechanical problems with the servo or electrical problems with the motor, servo drive amp, or power supply. This fault would not allow the transmitter to put out power since the transmitter may not be at the proper tuning point. R.5.25 Tune Servo Position Sample Two voltages are taken from the Tune Servo Assembly and used in the servo control. R.5.25.1 Tune Servo Position Feedback A potentiometer is mechanically connected to the servo and provides the position voltage.
PAGE 325
compartments. If a cable is disconnected, the relays on the board might not be in the correct position. NOTE The Driver Section has only 2 Efficiency Coil boards. R.5.27.1 Closed Loop A single +24VDC supply leaves the Frequency Control Interface board and loops through all connections, and eventually returns back to the input of a comparator. If all connections are made, the voltage at the (+) input will be greater than the (-) inputs. The output is logic high, which is the normal condition. R.5.27.
PAGE 326
R.6.5 Servo Control R.6.2.3 Relay Drivers a. If the PAL output is correct, but the relay(s) does/do not switch. b. Remove the input jumper plug for the driver. 1. Connect the input to ground, the driver output should be 0VDC at the output connector. 2. Connect the input to +5VDC, the driver output should be +24VDC low at the output connector. 3. If incorrect measure the +24VDC supply, and ohmmeter test the relay coil at the connector, or replace the driver if needed. R.6.3 Tune Mode Control R.6.3.
PAGE 327
R.8 Alignment The same procedure may be used for both the Tune and Load Servos R.8.1 Lower Electrical Stop a. Monitor the Position voltage for the servo. b. Lower servo until meter stops decreasing, and note the number. c. Shut off the Servo Breaker. d. Monitor the Reference voltage and hold down the Lower switch until the counter stops. e. Adjust the Lower Limit pot until the meter reads the same as the voltage noted earlier plus 0.1 Volts. R.8.2 Upper Electrical Stop a.
PAGE 328
Figure R-5. Frequency Control Interface Controls and Indicators R-12 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 329
Figure R-6. Frequency Control Interface Component Location 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 330
R-14 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 331
Section S 3F Select Board S.1 Introduction This section describes the 3Frequency select Board. Topics include Function and Location. Parts list for this board is in Section VII. Board # 843 5523 973 Schematic # 843 5523 971 PWA # 992 9764 500 Frequency. LED’s imbedded in the switches tell you what the current Freq is by 3 latching relays. In the event of an AC failure and when AC is restored the last state that the Relays were in will represent the current state. S.
PAGE 332
Section T 3F Controller Board T.1 Introduction This section describes the 3 Frequency Controller Board. Topics include Function, Location, and troubleshooting. Board # 843 5400 733 Schematic # 843 5515 842 PWA # 992 9511 588 Depending on the distance the servo has to travel in order to reach its reference will determine the speed of the servo. If the Difference between the Tune Ref Voltage and Tune Pos Voltage is greater than 2.45V than the 3F controller will Active the Tune Raise/Lower.
PAGE 333
T-2 888-2339-002 WARNING: Disconnect primary power prior to servicing.
PAGE 334
Section U Servo Calibration U.1 Servo Calibration When S100 is in the Calibrate Position Adjust the Tune and Load servos for a Power Peak and the amount of current for the # of Modules ON.
PAGE 335
Appendix A DX Digital Modulation Technology and Concepts a.1 DX Digital Modulation Technology and Concepts a.1.1 Digital Terms and Concepts The discussion of Analog to Digital and Digital to Analog Conversion will include some terms, abbreviations, and concepts used in this Technical Manual which may not be familiar to some Broadcast Station engineers and technicians. A summary is included here for review or reference. a.
PAGE 336
are not familiar with A/D and D/A conversion techniques. This discussion will provide a background for a discussion of these sections of the transmitter. a.1.2 Analog to Digital Conversion Process Before continuing with a description of transmitter circuits, the Analog to Digital (A/D) and Digital to Analog (D/A) conversion processes will be reviewed. This review will provide a background for discussing the transmitter’s modulation section.
PAGE 337
1. Re-create the analog Voltage represented by the digital word by turning on or off units of dc Voltage (or RF Voltage) and holding it constant for one time interval. 2. Pass the reconstructed audio through a low pass filter to remove the steps. This low pass filter may also be called a reconstruction filter. It acts as a “smoothing filter,” removing the steps to provide a high quality analog signal. STEP 1: Re-create the analog Voltage represented by the digital word.
PAGE 338
a-4 888-2339-002 WARNING: Disconnect primary power prior to servicing.