Maintenance Manual LPE-200 SCAN And SYSTEM PORTABLE RADIOS 900 MHz tab ericssonz
AE/LZB 119 1902 R1A MANUAL REVISION HISTORY REVISION R1A DATE DEC 1996 REASON FOR CHANGE Original issue NOTICE! This manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc. NOTICE! Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier.
AE/LZB 119 1902 R1A TABLE OF CONTENTS SPECIFICATIONS...................................................................................................................................................................... 4 GENERAL............................................................................................................................................................................... 4 RECEIVE .................................................................................................
AE/LZB 119 1902 R1A BASIC TROUBLESHOOTING ............................................................................................................................................ 19 ERROR CODES INTRODUCTION ..................................................................................................................................... 22 ERROR CODE OVERVIEW ...............................................................................................................................................
AE/LZB 119 1902 R1A SPECIFICATIONS∗ (Con't) RECEIVE Channel Spacing 12.5 kHz Sensitivity (12 dB SINAD) -118dBm Selectivity: -63 dB Intermodulation -67 dB Frequency Separation Full Bandwidth Audio Output 500 mW @ 3% Maximum Distortion TRANSMIT RF Power Output 0.5 - 3 Watts (Normal Trunked) Spurious and Harmonics -55 dBc Modulation/Deviation ±2.
AE/LZB 119 1902 R1A The back lit keypad allows the user to access the many radio functions. The 6-button SCAN provides easy access to preprogrammed telephone and individual radio ID’s, while the 15-button System keypad expands this capability, allowing direct entry of these numbers. The LPE-200 radios have a keypad with translucent keys. A detailed description of the keypads and their additional function is found in the OPERATION section. DESCRIPTION The Ericsson Inc.
AE/LZB 119 1902 R1A MECHANICAL The radios are packaged in a polycarbonate blend exterior housing. A six-cell back mounted nickel cadmium battery pack provides a nominal 7.5 volts. Two different nickel cadmium battery packs offering high and extended capacities are available for use with the portable radios. The top of the radio has a Volume, Channel/ Area/System select knob, Emergency/Home button, TX LED and a screw-on antenna mount connector.
AE/LZB 119 1902 R1A OPERATION The LPE-200 series of portable radios is designed for EDACS and conventional mode operation. When the unit is used in a trunked EDACS, the digital control channel is automatically monitored. When the user initiates a call, the unit sends a digital request through a control channel to the site controller. The site controller then assigns the calling radio and all members of the talk group to an available working channel.
AE/LZB 119 1902 R1A KEYPAD SCAN/SYSTEM FUNCTIONS Key Function (Scan only) Adds/Deletes selected groups or channels from the Scan list of the currently selected system. SCN Turns the Scan operation On and Off. A/D (Scan only) Figure 2 - Scan Keypad OPT (Scan only) 1 (System only) 1-9, *, 0, # 2 3 * # 6 9 (System only) Figure 3 - System Keypad Key ▲ ▼ Function Primary Function: Allows user to select either system, groups, or channels, depending on personality programming.
AE/LZB 119 1902 R1A storage and personality storage. This software supports read/write of EEPROM data such as Tracking Data and Feature Encryption. Data compression is used to reduce FLASH application loading time. CIRCUIT ANALYSIS The portable radio is unique in the generation of the transmit carrier. The transmit section has an offset frequency loop operating at 115.2 MHz. This means the synthesizer is operating at a frequency that is not harmonically related to the output frequency.
AE/LZB 119 1902 R1A Local Oscillator Buffer (V450) The injection frequency (1011.2-1016.2 MHz) from the synthesizer circuit is applied to the base of Local Oscillator (LO) NPN buffer transistor V450 through capacitor C450 and inductor L450. This signal at the input of V450 is 0 dBM and is amplified to +4 dBm. This signal can be metered at TP450. The output of V450 is connected to the input of mixer Z402 (Pin 1).
AE/LZB 119 1902 R1A Digital I/O Lines The balanced RxIF and RxIF_B (B implies “Barred” indicating that the condition is true when the line is low) lines connect through resistor and capacitor RF decoupling circuits to HILLARY D701. RxIF connects through resistors R715 and R714 and capacitor C707 to D701, Pin 8. RxIF_B connects through resistors R717 and R718 and capacitor C709 to D701, Pin 7. Both of these lines connect to a Phase Digitizer internal to D701.
AE/LZB 119 1902 R1A TRANSMITTER Transmit Frequency Generation The main VCO, in the synthesizer circuit, is programmed to generate the 1st LO receive injection frequency (1011.2 to 1016.2 MHz). This carrier frequency is mixed with a transmit offset frequency of 115.2 MHz to generate the carrier and two side band frequencies. The carrier and upper side band are suppressed and only the lower side band is transmitted. For example: the carrier frequency of 1015.2 MHz minus the offset frequency of 115.
AE/LZB 119 1902 R1A (MODQ and MODQ_B). The I input passes through a low pass filter consisting of capacitors C191, C192 and C193, resistor R166 and inductors L156 and L157. The output of this filter connects to N150, Pins 43 (I) and 42 (I_bar). The Q input passes through a low pass filter consisting of capacitors C194, C195 and C196, resistor R167 and inductor L158 and L159. The output of this low pass filter connects to N150, Pins 41 (Q) and 40 (Q_bar).
AE/LZB 119 1902 R1A divider consisting of resistors R116 and R117. The output of the divider circuit connects to power control buffer amplifier N102-B, Pin 5 (+IN). The output of N102-B drives Pin 1 of the power amplifier. Power Control Buffer (N102-B) A regulated 5.5 Vdc is applied to power control buffer N102-B, Pin 8 (V+). The buffer circuit is a shaping circuit which provides a control voltage on Pin 7 (+OUT). This voltage after passing through resistor R120 is typically 2.5 Vdc to 3.
AE/LZB 119 1902 R1A the voltage divider consisting of resistors R202 and R204 and can be metered at test point TP202. The level of this signal is typically 25 mV RMS. This feedback signal connects through coupling capacitor C207 to N203, Pin 5 (INM1). The voltage level at this point is typically 4.5 V. Main Synthesizer (N203) In synthesizer N203 the feedback signal from the VCO is input to a prescaler where it is divided down to produce a 19.2 MHz signal. This signal is compared with the 19.
AE/LZB 119 1902 R1A Tx Switch (V192) Processor Reset The Tx Switch consists of transistor V192. Transistor V192 is normally off (receive). When the Delayed Push-ToTalk (DPTT) line goes high (transmitter keyed), transistor V192 conducts and the base of B+ Switch PNP transistor V191 goes low. +5V_D is connected through resistor R901 to open collector output N900, Pin 5 (ERROR). Timing is provided by pull-up resistor R901 and capacitor C905. The ERROR voltage can be metered at test point TP903.
AE/LZB 119 1902 R1A LCD NEGATIVE BIAS GENERATOR A 96 kHz, 5V p-p square wave from HILLARY D70157 is rectified and inverted to a negative supply voltage by C922, V909 and C923. This negative voltage is controlled to the LCD by V910 to vary the display contrast. Thermistor R604 is monitored via the A/D input to DEBBIE.
AE/LZB 119 1902 R1A 4. Flash Programming The “FLASH” software is the current version of the LPE-200 radio operating software. When changes and enhancements are made to the operating code, the new operating code can be “FLASHED” to the radio, upgrading the operating code without any hardware changes to the radio. Flash software is simply a computer file which is read from a disk and downloaded to the radio using the PC Programmer. The Equipment Setup shown in Figure 7 is same as for Personality Programming.
AE/LZB 119 1902 R1A Table 1 - General Troubleshooting Symptom Possible Cause/Action Required Completely Inoperative (no display or audio on power up) Power Supply Problem? 1. Check battery voltage with a voltmeter. 2. Charge battery or replace battery. 3. Check to be sure battery contacts are not broke or bent. 4. Clean battery contacts. 5. Check Fuse (F190). At power -up an error message is displayed. 1.
AE/LZB 119 1902 R1A Figure 8 - Transmit Path - Test Points and Levels 21
AE/LZB 119 1902 R1A ERROR CODES INTRODUCTION This section lists all the radio errors and warnings. The radio displays errors and warnings to the user to indicate problems that have occurred. Radio errors can occur at any time from power up to power down. Each error code in the list includes an explanation of what went wrong and what action to take to correct the problem. Error codes are divided into three categories: • Fatal operational error codes. These errors will cause the radio to reset.
AE/LZB 119 1902 R1A Non-Fatal Errors Non-fatal errors are displayed for a short period (about two seconds) then normal radio operation will resume. Non-Fatal Errors Description Undocumented error. Feature encryption error. DSP error. Attempt to keyload w/o bank storage. Attempt to keyload w/o private DSP file loaded.
AE/LZB 119 1902 R1A FATAL_LCD_NOACK FATAL_LCD_HARD_FAIL FATAL_SCI_NOHEAP HARDWARE HARDWARE HARDWARE 40 41 50 FATAL_DSP_NOACK FATAL_DSP_FIFOOVR FATAL_DSP_BADMSG FATAL_DSP_WRONGRESP FATAL_DSP_TWOACKS FATAL_DSP_NORESOURCE FATAL_BL_NOHEAP FATAL_BL_SCI_ATTACH FATAL_RXSIF HARDWARE HARDWARE HARDWARE HARDWARE HARDWARE HARDWARE HARDWARE HARDWARE HARDWARE 60 61 62 63 64 65 91 92 98 LCD did not ack message. LCD hardware is invalid. Serial communication interface out of heap (RAM memory) space.
AE/LZB 119 1902 R1A PI_MALLOC_ERROR SOFTWARE 503 UI_FATAL_DEVICE_ERROR UI_FATAL_SWTO_MALLOC_ERROR UI_FATAL_SWTO_MAX_ERROR UI_FATAL_WINDOW_MAX_ERROR UI_FATAL_WINDOW_MALLOC_ERROR UI_FATAL_MESSAGE_INVPARM PERSDATA SOFTWARE SOFTWARE SOFTWARE SOFTWARE SOFTWARE 600 601 602 603 604 605 UI_FATAL_RI_MSGBUF_FULL SOFTWARE 606 UI_FATAL_RISYS_MSGBUF_FULL SOFTWARE 607 UI_FATAL_CI_MSGBUF_FULL UI_FATAL_DEVICE_NOTSUPPORTED SOFTWARE PERSDATA 608 609 UI_FATAL_AUXIO_MALLOC_ERROR UI_FATAL_NET_DEVICE_ERROR UI_FATA
AE/LZB 119 1902 R1A Error Name PIFEAT_SNR_ERROR Message FEAT ERR Code 550 PIFEAT_READ_ERROR FEAT ERR 551 PIFEAT_CRC_ERROR FEAT ERR 552 RI_DSPDOWN_NOATTEMPT RI_DSPDOWN_NOTFOUND RI_DSPDOWN_CRCFAIL RI_DSPDOWN_ENCERR RI_DSPDOWN_PMFAIL DSP ERR DSP ERR DSP ERR DSP ERR DSP ERR 850 851 852 853 854 RI_DSPDOWN_DMFAIL DSP ERR 855 RI_DSPDOWN_BIOSERR AEGIS_KEYLOAD_NOBANKS AEGIS_PVT_NONE DSP ERR NO KBANK NO PVT 856 860 870 Description Feature encryption - Cannot read radio ROM serial number.
AE/LZB 119 1902 R1A Radio- Canceled by receiver Radio- Canceled by sender Radio- End of transmission received Radio- Transmit error 15 16 17 18 Radio- Invalid command Radio- No application code 19 20 Radio- Application code error Radio- EEPROM programming error Radio- Baud rate has changed 21 22 23 The radio operating software received a cancel command. The radio software received or sent an end of transmission. Radio could not transmit the required data.
AE/LZB 119 1902 R1A DISASSEMBLY PROCEDURE Figure 11 5. To disassemble the LPE-200 radio: Figure 9 1. Remove the battery pack by pushing the battery release button and sliding the battery pack straight back until it stops, then lift the battery pack out. When replacing the battery pack align the ribs on the sides of the battery pack with the slots in the sides of the radio. Push down and slide the battery pack into place.
AE/LZB 119 1902 R1A Figure 13 Figure 15 10. Using a flat blade screwdriver, push on the battery contacts. Be careful not to damage the gasket. Applying pressure on the battery contacts will slowly separate the main circuit board and shield from the metal frame. 12. Remove the board from the shield by prying up on a corner and working around the board to release the snaps. Figure 13 - Push Battery Contacts Figure 14 11. Carefully unplug the small flex at the top of the radio (F).
AE/LZB 119 1902 R1A Figure 17 14. Pry up on the hook to release from the latch and push down on the switches to remove the assembly from the housing. PA Module Replacement Remove the PA Module by unsoldering the five (5) leads attached to the Main Board (see the Outline Diagram). Solder new module in same location. Filters Z400 And Z401 Replacement Filter Z400 has four (4) leads that go all the way through the board and are soldered on the reverse side of the board. Unsolder the four leads to remove Z400.
ASSEMBLY DIAGRAM AND PARTS LIST AE/LZB 119 1902 R1A LPE-200 Radio 900 MHz SYMBOL PART NUMBER DESCRIPTION 1 SXK 107 3807/2 Front Assembly (LPE-200 Scan) 1 SXK 107 3808/2 Front Assembly (LPE-200 System) 2 SXK 107 3815 Rear Assembly (896 - 940 MHz TX) MARRIAGE HARDWARE KIT 3 SXA 120 4145 Main Gasket 4 SBA 124 025/0080 Screw (2) 6 SXA 120 4118 Washer Stop.
AE/LZB 119 1902 R1A ASSEMBLY DIAGRAM AND PARTS LIST Front Assembly (Scan) SXK 107 3807* SYMBOL PART NUMBER DESCRIPTION 2 SXA 120 4112/02 Keypad Scan (LPE-200) 3 SXA 120 4122 Keypad Retainer 4 ROA 117 2216** Flex Assembly/Printed Bd 6 SXA 120 4119 Speaker Gasket 7 RLE 906 18/2 Loudspeaker 8 SXA 120 4121 PTT Actuator 9 SXA 120 4120 Side Control Bezel 10 SXA 120 4136 Side Control Keypad 11 SXA 120 4128 Gasket: UDC PWB 12 SXA 120 4129 Gasket: PTT 13 SVF 930 1252 UDC Label 14
ASSEMBLY DIAGRAM AND PARTS LIST AE/LZB 119 1902 R1A Front Assembly (System) SXK 107 3808* SYMBOL PART NUMBER DESCRIPTION 2 SXA 120 4115/02 Keypad System (LPE-200) 3 SXA 120 4122 Keypad Retainer 4 ROA 117 2216** Flex Assembly/Printed Bd 6 SXA 120 4119 Speaker Gasket 7 RLE 906 18/2 Loudspeaker 8 SXA 120 4121 PTT Actuator 9 SXA 120 4120 Side Control Bezel 10 SXA 120 4136 Side Control Keypad 11 SXA 120 4128 Gasket: UDC PWB 12 SXA 120 4129 Gasket: PTT 13 SVF 930 1252 UDC Label
AE/LZB 119 1902 R1A ASSEMBLY DIAGRAM AND PARTS LIST Rear Assembly SXK 107 3815 SYMBOL PART NUMBER DESCRIPTION 1 SXK 107 3816 Rear Housing Casting 2 SXA 120 4110 Rear Cosmetic Cover 3 RNT 403 351/01 Antenna Switch Assembly 3A RNT 403 351/901 Gasket 3B RNT 403 351/900 Nut 4 SXA 120 4133 Switch Retainer 5 ROA 117 2220 Switch Module Assembly 6 SXA 120 4134 Switch Gasket Assembly 7 ROA 117 2212 DSP Module 8 ROA 117 2297 Main Board Asm (900 - 824 MHz) 9 SXK 107 3818 RF/ Logic S
ASSEMBLY DIAGRAM AND PARTS LIST AE/LZB 119 1902 R1A 900 MHz Main Board Assembly ROA 117 2297 SYMBOL PART NUMBER DESCRIPTION 2 SXA 120 4167 Ground Pad N101 RYT 901 6118/2 PA Module U201 RTL 204 614/03 Reference Oscillator X101 RPT 403 303/01 Battery Connector Z400 RTN 202 728/03 Filter Z401 RTN 202 728/02 Filter * COMPONENTS ADDED, DELETED, OR CHANGED BY PRODUCTION CHANGES. 900 MHz Main Circuit Board Assembly (151 88-ROA 117 2297, Rev.
AE/LZB 119 1902 R1A OUTLINE DIAGRAM FRONT SIDE 900 MHz Circuit Board (1078-ROA 117 2297 Uen, Sheet 1, Rev.
OUTLINE DIAGRAM AE/LZB 119 1902 R1A BACK SIDE 900 MHz Circuit Board (1078-ROA 117 2297 Uen, Sheet 2, Rev.
AE/LZB 119 1902 R1A Block Diagram (1911-ROA 117 2297, Sheet 1, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Transmitter (1911-ROA 117 2297, Sheet 2, Rev.
AE/LZB 119 1902 R1A Transmit Offset (1911-ROA 117 2297, Sheet 3, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Synthesizer (1911-ROA 117 2297, Sheet 4, Rev.
AE/LZB 119 1902 R1A Receiver Front End (1911-ROA 117 2297, Sheet 5, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Receiver Back End (1911-ROA 117 2297, Sheet 6, Rev.
AE/LZB 119 1902 R1A RF Regulators (1911-ROA 117 2297, Sheet 7, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Digital I/O Lines to RF Section (1911-ROA 117 2297, Sheet 8, Rev.
AE/LZB 119 1902 R1A Analog I/O Lines to RF Section (1911-ROA 117 2297, Sheet 9, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A TX/RX Audio (1911-ROA 117 2297, Sheet 10, Rev.
AE/LZB 119 1902 R1A TX/RX Audio (1911-ROA 117 2297, Sheet 11, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Flex Connector (1911-ROA 117 2297, Sheet 12, Rev.
AE/LZB 119 1902 R1A DSP Connectors (1911-ROA 117 2297, Sheet 13, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A System Memory (1911-ROA 117 2297, Sheet 14, Rev.
AE/LZB 119 1902 R1A Regulators/Power Switch (1911-ROA 117 2297, Sheet 15, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A LCD Bias, LED Driver, UDC SWA+ OUT (1911-ROA 117 2297, Sheet 16, Rev.
AE/LZB 119 1902 R1A Debbie D601 (1911-ROA 117 2297, Sheet 17, Rev.
SCHEMATIC DIAGRAM AE/LZB 119 1902 R1A Hillary D701 (1911-ROA 117 2297, Sheet 18, Rev.
AE/LZB 119 1902 R1A Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-592-7711 (Outside USA, 804-592-7711) AE/LZB 119 1902 R1A Printed in U.S.A.
