Agilent Technologies 6038A 6010A Manuel de service

SERVICE MANUALAUTORANGINGSYSTEM DC POWER SUPPLYAGILENT MODELS 6033A and 6038AFOR INSTRUMENTS WITH SERIAL NUMBERSAgilent Model 6033A; Serials US3832023

10Manual RevisionsAgilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first twoletters in

Figure 6-9B. GPIB Board Schematic Diagram

101Al00 Vac Input Power Option 100General InformationDescriptionOption 100 is a modification of Agilent 6033A/6038A power supplies that involves chang

102On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step c,change 5.000625V to 4.250625V ±100µV (6033A).change 5.000625V to 4

103On Page 26, in Current Programming and Readback Accuracy steps c and g,change 20V to 17V (6033A).change 60V to 50V (6038A).On Page 27 in Load Effec

104On page 68, change 200W to 150W.Chapter 5 and 6 Manual ChangesOn Page 76,change A2 board from 06023-60023 to 06023-60123 (6033A).change A2 board fr

105BBlank Front Panel Option 001IntroductionThis appendix describes the blank front panel option (Option 001) for the power supply. Option 001 is desi

106Chapter 3 Manual Changes:Replace Figure 3-1 with the figure on the next page. SA Tables 3-5 through 3-7 do not apply to Option 001 units.Chapter 5

107Figure 3-1. Troubleshooting Isolation (option 001)

109CAgilent 6033A Test RecordPerformance Test Record - Agilent 6033A POWER SUPPLY (Page 1 of 2)Test Facility:_________________________________________

112Calibration and VerificationIntroductionThis section provides test and calibration procedures. The operation-verification tests comprise a short pr

110Performance Test Record - Agilent 6033A POWER SUPPLY (Page 2 of 2)MODEL Agilent 6033AReport No.______________ Date_____________________PageNo.Test

111DAgilent 6038A Test RecordPerformance Test Record - Agilent 6038A POWER SUPPLY (Page 1 of 2)Test Facility:_________________________________________

112Performance Test Record - Agilent 6038A POWER SUPPLY (Page 2 of 2)MODEL Agilent 6038AReport No.______________ Date_____________________PageNo.Test

113EManual BackdatingThis section describes changes that must be made to the manual so that it applies to instruments with serial numbers lowerthan th

12Table 2-1. Test Equipment Required TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODELOscilloscope Sensitivity: 1 mVBandwidth: 20MHz & 100MH

13Table 2-2. Guide to Recalibration After RepairPrinted CircuitBoardBlock Name Ref.Desig.Perform These ProceduresA1 Main Board R3 Current Monitor Ful

14Table 2-2. Guide to Recalibration After Repair (continued)Printed CircuitBoardBlock Name Ref.Desig.Perform These ProceduresA8 GPIB Board Voltage DA

15Maintenance described herein is performed with power supplied to the instrument, and protective coversremoved. Such maintenance should be performed

16Remote Readback Zero CalibrationNote: This procedure and the following three procedures must be done as a set, without omitting any of the fourpro

17c. Attach the DVM from - S to + S terminals on rear panel.d. Adjust A8R58 (CV PROG F.S.) to: 20.0025 ±600µV (6033A). 60.0075 ±1.82mV (6038A).e.

18Constant Current Zero Calibrationa. Connect the test setup shown in Figure 2-3.b. Send string ''VSET 5; ISET 0; OUT ON''.c. A

19Constant Current Full Scale CalibrationNote: This procedure requires that CC PROG ZERO (A8R29) and I-MON F. S. (A2R9) be adjusted withinspecificatio

2CERTIFICATIONAgilent Technologies certifies that this product met its published specifications at time of shipment from the factory. AgilentTechnolog

20d. Attach the DVM from P to VP on the rear panel.e. Adjust A2R23 (R-PROG F.S.) to 2.5V ±4mV.f. Remember to reset MODE switches to original setti

21Figure 2-4. Current-Monitoring Resistor SetupGPIB Controller. Most performance tests can be performed using only front-panel controls. However, a GP

22Load Effect (Load Regulation). Constant-voltage load effect is the change in dc output voltage (Eo) resulting from aload-resistance change from open

23 d. Turn up output voltage to: 20.0Vdc (6033A). 60.0Vdc (6038A). as read on the digital voltmeter.e. Reduce the resistance of the load to draw

24Figure 2-6. RMS Measurement Test Setup, CV PARD TestFigure 2-7. Peak-To-Peak Measurement Test Setup, CV PARD Test

25a. Connect the test equipment as shown in Figure 2-7. Operate the load in constant resistance mode (Amps/Volt) and setresistance to maximum.b. Tur

26.Figure 2-8. Load Transient Recovery WaveformConstant Current (CC) TestsCC Setup. Constant-current tests are analogous to constant-voltage tests, w

27Load Effect (Load Regulation). Constant current load effect is the change in dc output current (Io) resulting from aload-resistance change from shor

28 29Adc (6033A). 10Adc (6038A). Check that the unit's CC LED remains lighted.d. Check that the rms noise current measured by the current prob

293TroubleshootingMaintenance described herein is performed with power supplied to the instrument, and protective coversremoved. Such maintenance sho

3SAFETY SUMMARYThe following general safety precautions must be observed during all phases of operation, service and repair of thisinstrument. Failure

30Electrostatic ProtectionThe following caution outlines important precautions which should be observed when working with static sensitivecomponents i

31When replacing any heatsink-mounted components except thermostat, smear a thin coating of heatsinkcompound between the component and heatsink. If a

32A8 GPIB Board RemovalRemove the A8 board as follows:a. Remove the two screws (Pozidriv, M3x.5) which attach the A8 GPIB board to the rear panel. Re

33AC POWER WIRE PLUG ONTO TERMINALfrom color desig. locatedF1 fuse wht/brn/gry L left-rear cornerFL1 line module white/gry N right of abovePlu

34Figure 3-1. Troubleshooting Isolation

35Figure 3-1. Troubleshooting Isolation (continued)

36Table 3-1. Selftest Error Code TroubleshootingError Code Description Check Functional CircuitERROR 4 External RAM Test Replace A8U8ERROR 5 Internal

37Figure 3-3. Clock and Primary SA Waveforms

38+5V and PCLR Circuits:Node MeasurementU1-8 ≈ 3.5VdcU1-2 = 4VdcU1-3 = 4.2VdcU1-4 = 4.2VdcU1-6 ≈50mVdcClock Signals (See clock waveforms in Figu

39Use 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

4Safety Symbol DefinitionsSymbol Description Symbol DescriptionDirect current Terminal for Line conductor on permanentlyinstalled equipmentAlternating

40Figure 3-4. Readback and Secondary SA Waveforms

41Signature AnalysisPerform the signature analysis only after you have completed the Primary Processor Troubleshooting.The easiest and most efficient

42Return the J5 jumper to its normal position when the front panel signature analysis is complete.Secondary SAFor secondary SA troubleshooting, connec

43Table 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.00.00A(0) A46

44Table 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 Measureme

45Table 3-6. Front Panel Address Latches and Decoders (A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04 Inputs)Inputs:Node Measurements

46Table 3-7. Front Panel RPG Latches and Input Port(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01 A.00.02, and A.00.04)Inputs:Node MeasurementU11-1 1ABCU

47Table 3-8. Secondary Processor Signature TableDS(0) P36U U4-1 U7-15 U9-15 U11-15DS(1) 2280 U4-2 U7-14 U9-14 U11-14DS(2) 4277 U4-3 U7-13 U9-13 U11-1

48To troubleshoot the power supply the A4 power FET board and A2 control board can be raised out of the unit usingextender boards and cables provided

49An isolation transformer provides ac voltage that is not referenced to earth ground, thereby reducing thepossibility of accidentally touching two po

5TABLE OF CONTENTSIntroduction ...

50Figure 3-6. Modified Mains Cord Set For TroubleshootingPower Section BlocksThis section contains the blocks referenced in Tables 3-10 and 3-11.

51Table 3-9. Control Board Test Connector, A2J7PIN NO. SIGNAL NAME Vdc WAVEFORM/CONDITIONS SOURCEDigital-Circuits Bias & Reference Voltages1 +5V

52Table 3-10. Performance Failure SymptomsDEFECTIVE SYMPTOMS BOARD CHECK FUNCTIONAL CIRCUITSunexplained OVP shutdowns A2 OVP circuit, CV circui

53Troubleshooting AC-Turn-On CircuitsRelay AlK1 closes at 1.0 seconds and DROPOUT goes high at 1.1 seconds after 20V (5V UNREG) reaches about 11Vdc.D

54Inputs:NODE (+) NODE (-) MEASUREMENT SOURCEA2J3-26(PWM-ON) VM waveform #1 A2Ul7-6,A2P1-7, A4P1-24,CA2J3-25(PWM-OFF) VM waveform #2 A2U13-5,A2P1-13,A

55Outputs:NODE MEASUREMENTA2U6-6≈2 to 4Vdc sawtooth, 45KHzA2U6-12,13≈ 19V pk, 15µs pulses, 45KHzA2Q3 (emit)≈ 20V pk, 5µs pulses, 45KHzA2U5 (OUT) 2.5 V

56Figure 3-7. Waveforms

57-15 V On A2 Control Board. Voltage regulator A2U4 regulates the voltage across resistor A2R32 to be 1.25Vdc.Circuit Included. -15 Vdc bias supply ci

58Troubleshooting CV CircuitV-MON, the output of CV Monitor Amp A2U7 is the voltage between + S and - S. CV Error Amp A2U8 comparesV-MON to CV PROGRA

59If the failure symptoms include output current oscillation, check if the differentiator circuit is at fault by removing resistorA2R16. If oscillatio

6Signature Analysis ...

60Inputs:NODE SETUP MEASUREMENT SOURCEA2J3-1 5.0Vdc A2Q3 (emitter)A2U19-1 Hi A2U17D-11A2U19-2 Hi remote inhibitA2U19-4 Hi A2U14-1,8A2U19-5 Hi A2U11B-6

614Principles of OperationIntroductionThis chapter contains block diagrams, simplified schematics, and related descriptions of the power supply. The i

62Figure 4-1. GPIB Block Diagram

63EEPROMThe primary microprocessor determines the power supply ID, start-up parameters, calibration constants and scale factors byreading the factory-

64Front Panel BoardThe front-panel board, see Figure 4-2, contains the VOLTS and AMPS display circuits, the rotary pulse generator (RPG)and RPG decode

65Figure 4-2. Front Panel Block Diagram

66Mode IndicatorsThe front-panel mode indicators are controlled by the microprocessor via DATA DOWN and the mode indicator outputports and latches. DA

67Figure 4-3. Output Characteristics; Typical, Dual Range, and Autoranging SuppliesFigure 4-4. FET Control Signals Timing Diagram

68AC Turn-On CircuitsPrimary power comes to the input rectifier through a resistor which limits turn-on inrush current to the input filter. JumperA1W5

69the output line low. Five conditions can conditions can trigger down programming: programming of a lower output voltage,overvoltage, overtemperature

7Replaceable Parts...

70Differentiation of IVS develops a current proportional voltage which senses the interloop current flowing into the capacitiveoutput filter. CC error

71when no power is requested by the control circuits. To eliminate the delay, the initial-ramp circuit adds a ramp voltage toIp-RAM VOLTAGE at the inp

72

735Replaceable PartsIntroductionThis chapter contains information for ordering replacement parts. Table 5-3 lists parts in alpha-numeric order by refe

74Ordering InformationTo order a replacement part, address order or inquiry to your local Agilent Technologies sales office. Specify the followinginfo

75Table 5-3. Replaceable Parts ListRef. Desig. Agilent Model Agilent Part Number DescriptionA16033A 06023-60021Main Board Assembly6038A 06038-60021Mai

76Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR10 6033A 8151-0013 wire, tinned copper, AWG 2

77Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionA26033A 06023-60023Control Board Assembly6038A

78Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionC52,53 both 0160-4831 cap 4700pF 10% 100VC54 b

79Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR11 6033A 0698-3136 res 17.8K 1%6038A 0683-102

80Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR57 6033A 0683-1325 res 1.3K 5% 1/4W6038A 0683

81Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR97 both 0683-5125 res 5.1K 5% 1/4WR98 both 06

82Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR156-158 6038A 0683-1005 res 10 5% 1/4WS1 both

83Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR61,62 both 1810-0272 network sip 330 X9R63 bo

84Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR10 both 0683-1015 res 100 5% 1/4WR11 both 068

85Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionA8both 5063-3463GPIB /PSI BoardC1,4 both 0160-

86Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionL1 both 9170-1680 chokeL2-4 both 9170-1454 cor

87Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR72 both 0757-0400 res 90.9 1% 1/8WR73 both 07

88Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionA8 Mechanicalboth 1205-0564 heat sink (U33)bot

896Component Location and Circuit DiagramsThis chapter contains component location diagrams, schematics, and other drawings useful for maintenance of

91IntroductionScopeThis manual contains information for troubleshooting the Agilent 6033A/6038A 200W Autoranging Power Supply to thecomponent level. W

90Table 6-1. Schematic Diagram Notes (continued)10. For single in-line resistor packages, pin 1 is marked with a dot. For integrated circuit packag

91Figure 6-1. Top View, Top Covers Removed

92Figure 6-2. Main Board (A1) Component Location

93Figure 6-3. Control Board (A2) Component Location

94Figure 6-4. Front Panel Board (A3) Component Location

95Figure 6-5. Power Mesh Board (A4) Component Location

96Figure 6-6. GPIB Board (A8) Component Location

Figure 6-9A. GPIB Board Schematic Diagram