Agilent 6031A - Manuals

9 1 Introduction Scope This manual contains information for troubleshooting the Agilent 6030A, 6031A, 6032A, or 6035A 1000 W AutorangingPower Supply to the component level. Wherever applicable, the service instructions given in this manual refer to pertinentinformation provided in the Operation Manu...

10 Manual Revisions Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first twoletters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of asignificant design change. Th...

11 2 Calibration and Verification Introduction This section provides test and calibration procedures. The operation-verification tests comprise a short procedure to verifythat the unit is performing properly, without testing all specified parameters. After troubleshooting and repair of a defectivepo...

14 Table 2-2. Guide to Recalibration After Repair (continued) Printed Circuit Board Block Name Ref. Desig. Perform These Procedures A8 GPIB Board Voltage DAC All Remote Readback Zero CalibrationConstant Voltage Full Scale CalibrationVoltage Monitor and Remote Readback Full Scale CalibrationConstant ...

16 g. Adjust A8R51 (READBACK ZERO) until the value displayed on the controller toggles between: 0 and 50mV (6030A) 0 and 5mV (6031A) 0 and 15mV (6032A) 0 and 125mV (6035A) h. After adjusting A8R51 you must continue the calibration procedure through to the completion of Constant VoltageZero Calibrati...

17 Constant Voltage Full Scale Calibration Note: Perform this procedure only after completing Remote Readback Zero Calibration. a. Remove all external test circuits. b. Send string: "VSET 200; ISET 5; OUT ON" (6030A) ''VSET 20; ISET 5; OUT ON" (6031A) "VSET 60; ISET 5; OUT ON" (6...

18 Constant Voltage Zero Calibration Note : Perform this procedure only after completing Voltage Monitor and Remote Readback Full ScaleCalibration. a. Send string "VSET 0; ISET 5; OUT ON". b. Connect an external supply to the power supply as shown in Figure 2-2. c. Attach the DVM from - S to...

19 Current Monitor Full Scale Calibration Note: This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications. If it is not, performthe Current Monitor Zero Calibration before proceeding. a. Connect Rm current-monitoring shunt: (1milliohm, 6031A) (10 milliohm, 6030A, 6032A) (100 m...

20 Power Limit Calibration Note: This procedure requires that CC PROG F. S. (A8R55) be adjusted within specifications. If it is not,perform Constant Current Full Scale Calibration before proceeding. a. Connect the power supply to the ac power line through a variable autotransformer. Connect a DVM ac...

21 i. Adjust A2R26 (UPPER KNEE) clockwise until front panel CV LED turns on. Power supply output should be:200 ± 0.4V @5.25A in CV mode (6030A) 20.5 ± 0.5V @55A in CV mode (6031A) 60 ± 0.4V @18.2A in CV mode (6032A) 500 ± 0.4V @2.2A in CV mode (6035A) Resistance Programming Full Scale Calibration a....

25 e. Reduce the resistance of the load to draw an output current of: 5.0Adc (6030A) 50 Adc (6031A) 16.5 Adc (6032A) 2.0 Adc (6035A) Check that the unit's CV LED remains lighted. f. Adjust autotransformer to the minimum for your line voltage. g. Record the output voltage at the digital voltmeter. h....

26 Figure 2-6. RMS Measurement Test Setup, CV PARD Test Peak Measurement Procedure. Figure 2-7 shows the interconnections of equipment to measure PARD in Vpp. The equipment grounding and power connection instructions of Paragraph 2-36 apply to this setup also. Connect theoscilloscope to the + S and ...

27 Figure 2-7. Peak-To-Peak Measurement Test Setup, CV PARD Test Load Transient Recovery Time . Specified for CV operation only; load transient recovery time is the time for the output voltage to return to within a specified band around its set voltage following a step change in load. Use the equipm...

30 d. Turn up output current to: 17.0Adc (6030A) 120Adc (6031A) 50Adc (6032A) 5.0 Adc (6035A) e. Increase the load resistance until the output voltage between + S and - S decreases to: 60Vdc (6030A) 7.0Vdc (6031A) 20.0Vdc (6032A) 200 Vdc (6035A) Check that the CC LED is still on. f. Adjust autotrans...

31 Figure 2-9. CC PARD Test Setup Initialization Procedure Follow the procedure if either the GPIB assembly has been replaced, or the EEPROM (U70) has been replaced:1. Install the GPIB assembly in the unit. 2. Turn the power on and depending on your unit's model number, send string: "EEINIT 6030...

33 3 Troubleshooting Maintenance described herein is performed with power supplied to the instrument, and protective coversremoved. Such maintenance should be performed only by service-trained personnel who are aware of the hazards involved (for example, fire and electrical shock). Where maintenance...

34 Electrostatic Protection The following caution outlines important precautions which should be observed when working with static sensitivecomponents in the power supply. This instrument uses components which can be damaged by static charge. Most semiconductors cansuffer serious performance degrada...

35 When replacing any heatsink-mounted components except thermostat, smear a thin coating of heatsinkcompound between the component and heatsink. If a mica insulator is used, smear a thin coating of heatsink compound on both sides of the mica insulator. Do not use any heatsink compound containing si...

36 When installing the A4 power mesh board, lower it vertically, placing its tab into the A1 board slot, align the connector andpress in place. A5 Diode Board Removal After removing the cover, remove the A5 Diode board by first removing the two screws (Pozidriv) that hold heatsinks to theA1 board, t...

40 To remove the GPIB board, perform the GPIB board removal procedure discussed earlier in this section. Lay out the boardas shown in Figure 3-2 with a piece of insulating material under the board. Reconnect connectors W1, W2, W5, and W6after the board is on the insulating material. Note: The GPIB b...

41 +5V and PCLR Circuits: Node Measurement U1-8 ≈ 3.5Vdc U1-2 = 4 Vdc U1-3 = 4.2Vdc U1-4 = 4.2Vdc U1-6 ≈ 50mVdc Clock Signals (see clock waveforms in Figure 3-3) Node Measurement Source C7+,C8+ = 12MHz (see waveform) Y2 J5-8 = 6MHz (see waveform) U14 U35-12 ≈ 50mVdc (see waveform) U35 Data Lines Che...

43 Use the front panel controls to vary the output voltage and current from zero to full-scale output. Remember to turn off theunit and connect a short across the output before programming the current from zero to full scale. Use a DMM and checkthe voltages at the following nodes: CV DAC Circuits No...

45 Signature Analysis Perform the signature analysis only after you have completed the Primary Processor Troubleshooting. The easiest and most efficient method of troubleshooting microprocessor-based instruments is signature analysis. Signatureanalysis is similar to signal tracing with an oscillosco...

46 Return the J5 jumper to its normal position when the front panel signature analysis is complete. Secondary SA For secondary SA troubleshooting, connect the signature analyzer as shown in Table 3-3. Use a jumper wire and short U4pin 21 to common (U4 pin 20). Check for the waveforms in Figure 3-4 a...

47 Table 3-4. Primary Processor Signature Table (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04) A.00.04 A.00.02 A.00.01 A.00.00 A(0) A46A A46A A46A A46A U16-12 U6-12 U8-12 U12-11 U17-21 A(1) 4148 UH8O UH8O UH8O U16-13 U6-11 U8-11 U12-13 U17-22 A(2) 72F5 82H5 UO39 4FU1 U16-14 U6-10 U...

48 Table 3-5. Front Panel LED Display and Indicator Drivers (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A00.04 Inputs) Inputs:Node Measurement U1 to U10-1 6H15 U1 to U10-9 Cycle power to unit--Lo to Hi after approx. 160 ms U1 to U10-2,14 +5V U1 to U10-7 common U1-8 F05U U2-8 50A9 U3-8 6F...

51 Table 3-8. Secondary Processor Signature Table DS(0) P36U U4-1 U7-15 U9-15 U11-15 DS(1) 2280 U4-2 U7-14 U9-14 U11-14 DS(2) 4277 U4-3 U7-13 U9-13 U11-13 DS(3) 720F U4-4 U7-12 U9-12 U11-12 DS(4) 6A31 U4-5 U7-11 U9-11 U11-11 DS(5) 662U U4-6 U7-10 U9-10 U11-10 DS(6) 6020 U4-7 U7-9 U9-9 U11-9 DS(7) 63...

52 The A4 FET Board should only be raised on an extender when using the main troubleshooting setup.NEVER use a FET Board extender when the unit is operated with its normal ( ≈ 320Vdc) bus voltage. To do so is a personal shock hazard and can damage the power supply. To troubleshoot the power supply t...

53 An isolation transformer provides ac voltage that is not referenced to earth ground, thereby reducing thepossibility of accidentally touching two points having high ac potential between them. Failure to use an isolation transformer as shown in Figure 3-5 will cause the ac mains voltage to be conn...

54 AlR1, AlR3, and AlU1 connect to the ac mains voltage. Use a voltmeter with both input terminals floatingto measure the rail voltage. a. Select the functional circuit for troubleshooting based on your measurements and Table 3-11, which provides directionbased on the status of the PWM OFF and PWM O...

57 Troubleshooting AC-Turn-On Circuits Relay AlK1 closes at 2.5 seconds and AC FAULT goes high at 2.9 seconds after 21V UNREG reaches about 13Vdc. AC FAULT high enables the PWM if OVERVOLTAGE , INHIBIT , and OVERTEMP are also high. Circuits Included . High AC and AC Dropout Detectors, Bias Voltage D...

58 Inputs: NODE (+) NODE (-) MEASUREMENT SOURCE A2J7-26(PWM-ON) M 1.7 µ s, 20KHz pulse(see Waveform #1) A2Ul5-l,A2J5 11, A4P1-A3 A2J7-25(PWM-OFF) M 10 µ s, 20KHz pulse(see Waveform #2) A2U16-5,A2J5-13,A4P1-A2 NODE (+) NODE (-) MEASUREMENT SOURCE A4P1-C1 A4P1-A1 10.6Vdc AlU3-2 A4Q2-D A4Q4-S 39Vdc A1C...

61 Troubleshooting Down Programmer The down programmer discharges the output when either PWM OFF is generated or CV ERROR is more negative thanabout - 3Vdc. Comparator A5U1 triggers down programming when the voltage at A5U1-5 is less than about 4Vdc. Circuit Included . Down programmer and 10.6V bias...

62 Outputs: NODE ( + ) NODE (-) SETUP MEASUREMENT VM A2J7-4 3.75Vdc A2U5-1 " VP = 0 -14Vdc A2U3-6 " VP = 0 -14Vdc A2U5-1 " VP = 5 4.7Vdc A2U3-6 " VP = 5 5.1Vdc A2U5-7 " short A2J7-24 to A2U5-5 + 7.5Vdc If the failure symptoms include output voltage oscillation, check if the CV Er...

63 Setup . The Main Troubleshooting Setup, Page 53, except connect the external supply to the unit's + OUT ( + ) and - OUT (-) terminals. Apply the ac mains voltage to the isolation transformer. Adjust the unit's OVP limit to 10Vdc. Set the externalsupply (EXTERNAL) as instructed below. Outputs: NOD...

65 4 Principles of Operation Introduction This chapter contains block diagrams, simplified schematics, and related descriptions of the power supply. The instrumentcan be thought of as comprising two major sections: the GPIB, microcomputer, and interface circuitry; and the power meshand control circu...

68 Front Panel Board The front-panel board, see Figure 4-2, contains the VOLTS and AMPS display circuits, the rotary pulse generator (RPG)and RPG decoders, five pushbutton switches, mode indicators, and the OVP ADJUST potentiometer. Data from themicroprocessor is shifted to the display circuits via ...

71 Figure 4-3. Output Characteristics; Typical, Dual Range, and Autoranging Supplies Figure 4-4. FET Control Signals Timing Diagram Power Mesh Figure 4-5 is a block diagram of the power mesh. These circuits convert the ac input power to approximately 320Vdc, andconvert this dc voltage to the proper ...

73 Control Board Figure 4-6 is a block diagram of the control board. These circuits monitor the power supply operation and provide thesignals that control the power mesh. + 5V Bias Supply. This circuit operates from the + 5V Unregulated voltage from the main board, and generates + 5V and + 2.5V used...

75 Control Voltage Comparator. This circuit compares the voltage at the CONTROL PORT (represents power required at output) with PRIMARY CURRENT RAMP voltage (represents energy being stored for transfer to output). When RAMPvoltage exceeds CONTROL PORT voltage, the Control Voltage Comparator generate...

79 5 Replaceable Parts Introduction This chapter contains information for ordering replacement parts. Table 5-1 lists parts in alpha-numeric order by referencedesignators and provides the following information: a. Reference Designators. Refer to Table 5-1. b. Agilent Technologies model in which the ...

80 Ordering Information To order a replacement part, address order or inquiry to your local Agilent Technologies sales office. Specify the followinginformation for each part: Model, complete serial number, and any Option or special modification (J) numbers of theinstrument; Agilent Technologies part...

101 6 Component Location and Circuit Diagrams This chapter contains component location diagrams, schematics, and other drawings useful for maintenance of the powersupply. Included in this section are: a. Component location illustrations (Figures 6-1 through 6-9), showing the physical location and re...

107 Figure 6-3. Control Board (A2) Component Location Figure 6-4. Front Panel Board (A3) Component Location

123 Chapter 3 Manual Changes: On Page 45, in Readback Multiplexer (U20), change Node U20-9, Measurement from + 5V to: + 4.25V (6030A/31A/35A)+ 4.167V (6032A) On Page 53 in Main Troubleshooting and on Page 54 in Troubleshooting No-Out Failures step d, change 320Vdc to250Vdc. Chapter 4 Manual Changes:...

125 B Blank Front Panel Option 001 Introduction This appendix describes the blank front panel option (Option 001) for the Agilent 6030A/31A/32A power supplies. Option001 is designed for applications in which front panel operation and monitoring are unnecessary. It has no front-panelcontrols and indi...

129 C Agilent 6030A Test Record Performance Test Record - Agilent 6030A POWER SUPPLY (Page 1 of 2) Test Facility : __________________________________________ Report No.__________________________________________ __________________________________________ Date__________________________________________...

130 Performance Test Record - Agilent 6030A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6030A Report No.______________ Date_____________________ Page No. Test Description Minimum Spec. Results * Maximum Spec. Measurement Uncertainty Constant Voltage Tests 23 Voltage Programming and Readback Low Voltage...

132 Performance Test Record - Agilent 6031A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6031A Report No.______________ Date_____________________ Page No. Test Description Minimum Spec. Results * Maximum Spec. Measurement Uncertainty Constant Voltage Tests 23 Voltage Programming and Readback Low Voltage...

134 Performance Test Record - Agilent 6032A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6032A Report No.______________ Date_____________________ Page No. Test Description Minimum Spec. Results * Maximum Spec. Measurement Uncertainty Constant Voltage Tests 23 Voltage Programming and Readback Low Voltage...

136 Performance Test Record - Agilent 6035A POWER SUPPLY (Page 2 of 2) MODEL Agilent 6035A Report No.______________ Date_____________________ Page No. Test Description Minimum Spec. Results * Maximum Spec. Measurement Uncertainty Constant Voltage Tests 23 Voltage Programming and Readback Low Voltage...

137 G Manual Backdating This section describes changes that must be made to the manual so that it applies to instruments with serial numbers lowerthan those listed on the title page. Look in the following table for the serial number of your instrument, and make only thosechanges listed for your inst...