SERVICE GUIDE for Agilent 6610xA Power Modules Agilent Part No. 5959-3364 Microfiche Part No.
CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other International Standards Organization members.
SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation of this power module. Failure to comply with these precautions or with specific warnings elsewhere in this guide violates safety standards of design, manufacture, and intended use of the power module. Agilent Technologies assumes no liability for the user’s failure to comply with these requirements. GROUND THE POWER MODULE.
Printing History The current edition of this guide is indicated below. Reprints of this guide containing minor corrections and updates may have the same printing date. New editions are identified by a new printing date and, in some cases, by a new part number. A new edition incorporates all new or corrected material since the previous edition. Changes to the guide occurring between editions are covered by change sheets shipped with this guide. Edition 1 . . . . October, 1993 (Agilent Model 6610xA) Update .
Table of Contents Overview.................................................................................................................................................................................. 7 About This Manual ............................................................................................................................................................... 7 Related Documents ...........................................................................................................
Installing the Power Board ............................................................................................................................................. 58 Installing the Bias Board ................................................................................................................................................ 58 Installing the Front Panel Board and Front Panel Assembly ..........................................................................................
1 Overview About This Manual This manual is a complete guide for servicing the Agilent 6610xA Power Modules. Troubleshooting information for the Agilent 66000A MPS Mainframe is provided in the mainframe service manual (see "Related Documents"), which should be used with this manual. Note Troubleshooting the Agilent 6610xA Power Modules requires the use of one working Agilent 66000A MPS Mainframe.
Related Documents The following documents are related to this manual: Manual Part Number Agilent 66000A MPS Mainframe Installation Guide Agilent Series 6610xA MPS Power Modules User's Guide Agilent Series 6610xA MPS Power Modules Programming Guide Agilent Series 66000A MPS Mainframe Service Manual 66000-90001 5959-3386 5959-3362 66000-90003 Description Provides product specifications, installation, and connection information. Describes the operation of the MPS Power Modules.
Safety Considerations The Agilent 6610xA Power Modules are Safety Class 1 instruments that connect to a protective earth terminal when properly installed in an Agilent 66000A MPS Mainframe. Refer to the Safety Summary page at the beginning of this manual for general safety procedures and the meaning of safety symbols appearing in the manual and on the module. Electrostatic Discharge The Modular Power System has components that can be damaged by ESD (electrostatic discharge).
The following equipment is required to verify and troubleshoot the Agilent 6610xA Power Modules: Table 1-1.
2 Verification and Performance Tests This chapter contains test procedures to check the operation of the Agilent 6610xA Power Modules. The required test equipment is specified in Chapter 1. Sample performance test record sheets are included at the end of the chapter. Instructions are given for performing the tests either from a GPIB controller or the MPS keyboard. Two types of procedures are provided: Operation Verification tests and Performance tests.
Measurement Techniques Setup for Most Tests Most tests are performed at the rear terminals as shown in the following figure. Measure the dc voltage directly at the + S and - S terminals. Set the connector sense switch for local sensing and use adequate wire gauge for load leads as described in Chapter 2 of the Power Module User’s Guide. Figure 2-1. Performance Test Setup Many of the test procedures require the use of a variable load capable of dissipating the required power (see Table 1-1).
Table 2-1. Power Module Voltage and Current Values Agilent Model 66101A 66102A 66103A 66104A 66105A 66106A Full-Scale Voltage 8V 20V 35V 60V 120V 200V Max. Prog. Voltage 8.190V 20.475V 35.831V 61.425V 122.85V 204.75V Full-Scale Current 16A 7.5A 4.5A 2.5A 1.25A 0.75A Max. Prog. Current 16.380A 7.678A 4.607A 2.559A 1.280A 0.768A Max. Prog.
CV Source Effect This test measures the change in output voltage that results from a change in ac line voltage from the minimum to maximum value within the line voltage specifications. 1. 2. 3. 4. 5. 6. 7. 8. 9. Turn off the module and connect the ac power line through a variable-voltage transformer. Connect the output as shown in Figure 2-1 with the DVM connected between the + S and - S terminals. Set the transformer to nominal line voltage (either 115Vac or 230Vac).
unloading transients by triggering on the positive and negative slope. Figure 2-2. Transient Response Waveform Constant Current (CC) Tests CC Setup Follow the general setup instructions in the Measurement Techniques paragraph and the specific instructions given in the following paragraphs. Current Programming/Readback Accuracy This test verifies that the current programming and readback are within specification.
The following steps show how to set up an Agilent 3458A System Voltmeter from its front panel to take a statistical average of 100 readings. represents the unlabeled shift key in the FUNCTION/RANGE group. . 1. Program 10 power line cycles per sample by pressing . 2. Program 100 samples per trigger by pressing 3. Set up the voltmeter to take measurements in the statistical mode as follows: . 4. a. Press until the MATH function is selected; then press . b.
Note You may want to use the average reading program described previously. 7. 8. Adjust the transformer to the HIGH line voltage (e.g., 132Vac for a 115Vac nominal input, or 250Vac for a 230Vac nominal input), and record the output current reading. The difference in the current readings in steps (6) and (7) is the CC source effect and should not exceed the values listed in the Performance Test Record Tables under CC SOURCE EFFECT, for the particular model being tested.
Table 2-2. Performance Test Record for Model Agilent 66101A (8V, 16A) Pre Cal_____________Post Cal______________ Model Agilent 66101A Temperature___________________________Test Performed By_______________________ Serial Number_______________________Humidity________________________Date__________________________ Test Description Specification Actual 0 ± 3mV DVM ± 2mV ________ ________ 8V ± 5.4mV DVM ± 3.6mV ________ ________ 1mV ________ 0.
Table 2-3. Performance Test Record for Model Agilent 66102A (20V, 7.
Table 2-4. Performance Test Record for Model Agilent 66103A (35V, 4.5A) Pre Cal_____________Post Cal______________ Model Agilent 66103A Temperature___________________________Test Performed By______________________ Serial Number_______________________Humidity________________________Date__________________________ Test Description Specification Actual 0 ± 13mV DVM ± 8mV ________ ________ 35V ± 23.
Table 2-5. Performance Test Record for Model Agilent 66104A (60V, 2.
Table 2-6. Performance Test Record for Model Agilent 66105A (120V, 1.
Table 2-7. Performance Test Record for Model Agilent 66106A (200V, 0.
3 Troubleshooting This chapter provides troubleshooting and repair information for the Agilent 6610xA Power Modules. Before attempting to troubleshoot the modules, ensure that the problem is not with an external circuit or application, the mainframe, the GPIB controller, the application program, or the input power line. SHOCK HAZARD Most of the troubleshooting procedures given in this chapter are performed with power applied and protective covers removed.
§ Figure 3-5 - Troubleshooting No Output § Figure 3-6 - Troubleshooting High Output § Figure 3-7 - Troubleshooting Will Not Overvoltage § Figure 3-8 - Troubleshooting CV Accuracy § Figure 3-9 - Troubleshooting CC Accuracy § Figure 3-10 - Troubleshooting Downprogrammer § Figure 3-11 - Troubleshooting DAC Circuit § Figure 3-12 - Troubleshooting Readback Circuits Oscilloscope waveforms are provided on some flowcharts along with the settings required to generate the waveforms.
Figure 3-1.
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Figure 3-12.
Test Points The following test points are referenced in the troubleshooting flowcharts. Refer to the component locations diagram in Chapter 6 for the actual location of the test points on the pc board. Table 3-1. Test Points Test Point TP 0 TP 1 TP 2 TP 3 TP 4 TP 5 TP 6 TP 7 TP 8 TP 9 TP 10 TP 11 TP 12 TP 13 TP 14 TP 15 TP 16 TP 17 TP 18 TP 19 TP 20 TP 21 TP 22 Description Output circuit common (located on inboard side of R303) +5V (4.8 to 5.2 volts) +12V (11.4 to 12.6 volts) +7V (6.7 to 7.3 volts) +2.
Table 3-2.
Figure 3-13.
EEPROM Troubleshooting and Initialization Troubleshooting The power module can detect an EEPROM checksum error. This error is not identified by number, but causes the following symptoms: § The power module starts up with both the VOLTS and AMPS full-scale programming and metering ranges accepting values up to 1000. § Selftest error code 330 is stored in the SCPI error queue where it can be read by the controller (see Chapter 5 in the Power Module Programming Guide).
10 ! Program to initialize EEPROM or move factory preset data in 66101A, 20 ! 66102A, 66103A, 66104A, 66105A and 66106A power supply modules. 30 ! Rev A.00.
510 ! 520 Eprom_data_106a: ! ! EEPROM data for 66106A 530 DATA 16.4035,32.3969,204.75,0,65,0,4403.67,30.0918,0.768,0 540 DATA 67,4,0.9,5.25,240,0,255,100,20,66106 550 DATA 131.18,.248047,35231.2,-28.4202,0,0,4,66106,20,150 560 DATA 20,150,28321,40,20,10,82,84,0 570 ! 580 INPUT “Input Power Supply model number. Example:""66101A""",Model$ 590 Model$=TRIM$(UPC$(MODEL$)) 600 CLEAR SCREEN 610 ! 620 PRINT "The Power Supply Module must be in slot 0. Press ""Continue""" 630 PRINT "to resume program.
1010 NEXT I 1020 ! 1030 OUTPUT @Ps;"*CLS" ! Clears power supply registers 1040 ! 1050 OUTPUT @Ps;"CAL;STATE ON," ! Turn on cal mode, "0" passcode 1060 ! 1070 GOSUB Ps_error ! Error if passcode is not "0"! 1080 IF Err THEN 1090 OUTPUT @Ps;"*IDN?" ! Get data from model # location 1100 ENTER @Ps;Idn$ 1110 Model=VAL(Idn$[POS(Idn$,”,”)+1] ) 1120 ELSE 1130 GOTO Start 1140 END IF 1150 ! 1160 OUTPUT @Ps;"CAL:STATE ON,";Model ! Turn on cal mode, passcode = 1170 ! data at model number location 1180 ! 1190 GOSUB Ps_er
1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 1620 1630 1640 1650 1660 1670 1680 1690 1700 1710 1720 1730 1740 1750 1760 1770 1780 1790 1800 1810 1820 1830 1840 1850 1860 1870 1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 OUTPUT @Ps;"DIAG:EEPR ’’;Addr(I);’’,’’;Length(I);’’,’’;Init_data(I) NEXT I GOTO Cal_off ! Fact_preset: ! CLEAR SCREEN PRINT "This program should ONLY be completed if your power supply” PRINT "EEPROM has been replaced or a component that will effect" PRINT "the
2010 STOP 2020 END IF 2030 ! 2040 PRINT "Operation complete. Program stopped." 2050 STOP 2060 ! 2070 Ps_error: 2080 OUTPUT @Ps;"SYST:ERR?" 2090 ENTER @Ps;Err 2100 RETURN 2110 ! 2120 END ! Error handling subroutine ! Check for errors Figure 3-14. EEPROM Initialization Program (Sheet 5 of 5) Disassembly Procedures This section describes how to disassemble and reassemble the Agilent 6610xA Power Modules. Refer to Chapter 5 for the component descriptions.
Removing the Front Panel Assembly 1. Carefully unplug the front panel cable from the J3 connector on the Power board. 2. Spread the bottom of the chassis away from the front panel assembly and lift the assembly out of the chassis. Removing the Power Board 1. Carefully unplug the front panel cable from the J3 connector, the bias board cables from the J301 and J302 connectors, and the fan cable from the J102 connector on the Power board. 2.
Figure 3-15. Front Panel Assembly Locking Tabs Installing the Power Board 1. Insert the tabs along the bottom edge of the board in the corresponding slots on the bottom of the chassis and carefully install the board in the chassis. 2. Use the T10 driver and insert the four screws (two toward the back and two near the center) that attach the Power board to the chassis. 3.
Installing the Front Panel Board and Front Panel Assembly 1. Install the front panel, the front panel board, and the latch assembly in one of the front assembly halves. 2. Make sure that the front panel board is positioned in the slot closest to the front panel. 3. Carefully snap the other half of the front panel assembly together. 4. Insert the tab on the top of the front panel assembly in the corresponding notch on the chassis and position the front panel assembly into the chassis.
4 Theory of Operation This chapter provides a brief theory of operation for the Agilent 6610xA Power Modules. Figure 4-1 is a block diagram of the primary circuit functions of the power modules. The diagram references the schematic sheets where the circuits are located. AC Input and Bias Supplies AC input power is distributed to each module through the backplane connector board on the mainframe. A turn-on relay inside the module applies ac power from the mainframe to the power module.
Figure 4-1.
CV Amplifier The CV amplifier controls the output of the power module when the module is operating in constant voltage mode. The CV amplifier consists of two stages: an error amplifier stage and a voltage monitor stage. The calibrated CVPROG* signal from the CV DAC pulls current out of the negative input of the error amplifier at a rate determined by the DAC’s programmed value. The error amplifier in turn, controls the output of the module. The output of the module is monitored by the voltage monitor stage.
Pulse-Width Modulator, FETS, and Isolation Transformer The pulse-width modulator controls the FETS. The FETS are arranged in an "H" bridge configuration with the + and - dc rail at the top and bottom of the H. The 4 FETS are located on each leg of the "H", and the isolation transformer is located on the horizontal bar of the H. The FETS located diagonally across from each other are alternately turned on and off (Q201 and Q204 are turned on, then off; followed by Q202 and Q203 being turned on, then off).
OV Circuit The OV circuit consists of a comparator that compares the output voltage of the module with an overvoltage reference signal and shuts down the output when the output of the supply exceeds the overvoltage reference level. The microprocessor generates the overvoltage reference by putting out a pulse-width modulated signal that is filtered to produce a 0 to 4 volts reference (OVREF).
5 Replacement Parts Table 5-1 lists the electrical components of the Agilent 6610xA Power Modules' main, bias, and front panel boards. Table 5-2 lists the mechanical components of the module. Table 5-3 lists all of the components of the connector assembly. These tables provide the following information: § § § Reference designation Agilent Technologies part number Description of part You can order parts from your local Agilent Technologies sales office.
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Table 5-3. Output Connector Assembly Parts List Reference Designators Part Number Description C602, C603 C604 C605 J601 J602, J603 R601 SW1 TB601 VR601-VR603 5060-3470 0160-5422 0160-4281 1810-1379 1251-8410 1252-4311 0757-0442 3101-3133 0360-2423 1902-0968 ASSEMBLY-OUTPUT CONNECTOR BOARD CAP .047uF 20% CAP 2200pF 20% NETWORK-CAP SIP CONNECTOR, TO POWER BOARD CONNECTOR, TO CONNECTOR BOARD RES l0K 1% .
6 Diagrams This chapter contains test point and component location diagrams and schematics for troubleshooting the Agilent 6610xA Power Modules. SHOCK HAZARD Hazardous voltages are present throughout the Power and Bias board assemblies. Ac line voltage is present on some connectors even when the module is not turned on. The dc rail voltage to the module is 310 volts when the unit is turned on.
Schematic Notes Notes that apply to all schematic sheets are as follows: § All resistors are in ohms +/-1%, 1/8 W, unless otherwise specified. § All capacitors are in microfarads unless otherwise specified. § Refer to the parts list (Table 5-1) for the values of the resistors and capacitors that are enclosed by a heavy rectangle on the schematic. Their values differ from model to model. The schematic shows only the values used by Model 66105A. § An asterisk negates a signal name.
L305 L306 R309 L308 L307
A B C D +5V C502 13 20 33 53 74 0.1 10% 16V X7R 0160-7828 1 VCC I/O78 I/O77 I/O76 I/O75 I/O73 R507 2 R507 7 4 5 I/O72 52 J501 +5V 1 1252-3844 2 3 4 5 6 7 8 9 10 PIN SDATA 4.7K 5% I/O70 51 6 I/O69 I/O51 R507 SCLK 1 4.7K 5% 1810-1670 8 I/O67 50 CLK 1 3 44 8 I/O44 4.7K 5% 1810-1670 R508 VDISP U501 R508 4.
5 0 11 4 17 18 10 22 -I 20 SENSE 6 1 3 21 16 13 12 14 19 - OUT F I 15 9 7 8 + OUT
Main Board Component Coordinates C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C20 C21 C22 C23 C24 C27 C28 C192 C201 C202 C203 C204 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C217 C218 C219 X 8.1 8.1 8.1 7.3 8.5 7.9 9.1 9.1 9.7 9.1 6.5 7.4 8.5 8.5 9.3 10.7 8.5 9.8 8.0 8.0 5.9 6.9 7.3 7.4 5.6 6.7 1.1 0.5 10.6 7.1 4.1 1.6 1.6 2.3 0.5 1.6 1.1 2.9 2.3 1.5 1.5 5.0 1.1 Y 2.2 2.0 3.1 3.0 3.4 2.1 3.7 3.6 4.0 4.0 2.7 2.4 0.4 0.3 0.4 0.9 0.6 0.6 2.5 2.4 1.9 0.7 1.9 2.7 2.3 3.5 2.6 0.9 0.0 0.
Manual Backdating This section describes changes that must be made to the manual so that it applies to power modules with older serial number formats. Look for the serial number of your module on the table and make only those changes listed for that serial number.
CHANGE 8: In the parts list on page 65, change L204 through L211 from part number 5080-2251 to 9170-0442. CHANGE 9: On page 67, change R204, R214 to 61.8 ohms, part number 0757-0397. On page 65, delete D216, D217, part number 1901-1214. CHANGE 10: Indicate that software revision A.00.01 applies to these and earlier models. CHANGE 11: In the parts list on page 63, change C311 from 0160-4831 to 2200pF, part number 0160-4830. On page 68, change R311 from 0757-0349 to 51.1K part number 0757-0458.
Index B backdating....................................................................................................................................................................89 C component locator .......................................................................................................................................................83 constant current (cc) tests .............................................................................................................................
performance tests .........................................................................................................................................................11 programming values - modules....................................................................................................................................12 R revision number .............................................................................................................................................................
cv accuracy ...........................................................................................................................................................42 DAC .....................................................................................................................................................................45 downprogrammer..................................................................................................................................................
