Agilent Technologies 6011A Service Manual

SERVICE MANUALAUTORANGINGDC POWER SUPPLYAGILENT MODELS 6010A, 6011A,6012B and 6015AAgilent Part No. 06010-90001FOR INSTRUMENTS WITH SERIAL NUMBERSAgil

10Table 2-1. Test Equipment RequiredTYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODELOscilloscope Sensitivity: 1mVBandwidth: 20MHz & 100MHzInpu

100Output impedance is l0K ohm: the monitoring device input impedance should be at least 1M ohm to limit error to 1% +basic accuracy; 10M ohm to limit

101Remote Trip. A negative-going edge applied to terminal J3-30 ( TRIPREMOTE ) will shut down the power supply,reducing the output voltage to near zer

102Figure A-8. Remote ControlPower-On PresetThis open collector output line J3-6, provides a logic low pulse ( Preset-On -Power ) to the user that c

103U10D is on, it causes J3-6 ( Preset-On-Power ) to be low thus, if used, can initialize or delay a customer's systemoperation.AC Dropout Buffer

104This allows the controller to determine which supply initiated the shutdown. Following a multiple supply shutdown, each unitcan be reset individual

105TroubleshootingBefore attempting to troubleshoot the 002 Option Board, ensure that the fault is with the option itself and not with the mainpower s

106Figure A-11. Troubleshooting Current Programming of CV ModeFigure A-12. Troubleshooting Current Programming of CC ModeTroubleshooting Status Indi

107Figure A-13. Troubleshooting Status IndicatorsTo check Mode CV proceed as follows:a. Using test set-up, Figure A-13, connect to end of 2KΩ resis

108c. Turn on power supply.d. DVM should read approximately 5Vdc.e. Set voltage and current controls of power supply to maximum.f. Decrease resist

109Table A-3. Replacement PartsREF. DESIG. MODEL NO, PART NO. DESCRIPTIONA7 All 5060-2854 Opt. 002 Interface BoardC1,2 All 0180-0230fxd elect. 1µF 20

11Table 2-1. Test Equipment Required (continued)TYPE REQUIRED CHARACTERISTICS USE RECOMMENDED MODELLoad Resistors(6015A)40Ω, ±1%, 1000W250Ω, ±1%, 100

110Table A-3. Replacement PartsREF. DESIG. MODEL NO, PART NO. DESCRIPTIONR22 All 0686-1525 fxd. film 1.5K 5% 1/4WR23 All 0683-1535 fxd. film 15K 5% 1

111Table A-3. Replacement PartsREF. DESIG. MODEL NO, PART NO. DESCRIPTIONU19 6010A, 6011A 5060-2942 IC Voltage Reg. heatsink assy.U19 6012B 1826-0393

112Logic Symbols and DefinitionsHigh = more positiveLow = less positiveIndicator and Qualifier SymbolsOR functionPolarity indicator, shown outside log

113SCHEMATIC DIAGRAM NOTES1. ALL RESISTORS ARE IN OHMS, ± 5%, 1/4W, UNLESS OTHERWISE INDICATED.2. ALL CAPACITORS ARE IN MICROFARADS, UNLESS OTHERWIS

114Schematic Notes1. W1 in normally open position.2. W3 & W4 jumpered.3. Relays K1, K2 normally closed.4. S1A and S1B are located at the rear

115Figure A-16. Option 002 Board, Schematic Diagram

116BBackdatingManual backdating describes changes that must be made to this manual for power supplies whose serial numbers arelower than those listed

117Model 6012B Change Model 6015A ChangeSerial Numbers Serial NumbersPREFIX NUMBER PREFIX NUMBERUS3543 0101-0335 1 US3705 0101-0145 13543A 04801-05360

118R6, 1.3K, p/n 0811-1803U2, U4, Rectifier, p/n 1906-0006Delete:C27, C34, 0.01µF 400V, p/n 0160-6805CR6-CR13, power rectifier 400V, p/n 1901-0731R24,

119C1, C2, C4-C6, C8 to p/n 0180-3460C10 to p/n 0180-0426DS1 to p/n 1990-0325K1 to p/n 0490-1457K2 to p/n 0490-1341R5 to p/n 0686-3015R7 to p/n 0686-

12Initial SetupMaintenance described herein is performed with power supplied to the instrument, and protective coversremoved. Such maintenance should

120C1, C2, C4-C6, C8 to p/n 0180-3460C10 to p/n 0180-0426DS1 to p/n 1990-0325K1 to p/n 0490-1457K2 to p/n 0490-1341R5 to p/n 0686-3015R7 to p/n 0686-

121In the option 002 replaceable parts list change cover plate from p/n 06023-00025 to p/n 06023-00013. Add cover-plate p/n 06023-00010.6015A In the

122CHANGE 136010A In the option 002 (Appendix A) parts list and schematic diagram delete R57 and solder pin p/n0360-1300.6011AIn the parts list for th

123CHANGE 186012B In the parts list for A6 AC Input Filter delete capacitor C9.CHANGE 196012B In the parts list for CHASSIS MECHANICAL, change front f

13Table 2-2. Calibration Procedure (continued)TEST TESTEDVARIABLETEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTEDRESULTSV-MONZeroAdjust.V-MON VM (

14Table 2-2. Calibration Procedure (continued)TEST TESTEDVARIABLETEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTEDRESULTSPowerLimitAdjust.V(OUT)I(OU

15Table 2-2. Calibration Procedure (continued)TEST TESTEDVARIABLETEST POINTS TEST SEQUENCE AND ADJUSTMENTS EXPECTEDRESULTSPower LimitAdjust(continued

16Table 2-3. Guide to Recalibration After RepairPrinted CircuitBoardBlock Name Circuit Within Ref.DesignatorPerform TheseProcedures*A1 Main Board R11

17for the electronic load in the following tests:CV Source Effect (Line Regulation)CC Load Effect (Load Regulation)Temperature Coefficient (6015A)Drif

18Constant Voltage (CV) TestsCV Setup. If more than one meter or a meter and an oscilloscope are used, connect each to the + S and - S terminals by as

19g. When the reading settles, record the output voltage again. Check that the two recorded readings differ no more than:± 0.011Vdc (6010A)± 0.0037Vd

2CERTIFICATIONAgilent Technologies, Inc. certifies that this product met its published specifications at time of shipment from the factory.Agilent Tec

20 d. Reduce the resistance of the load to draw an output current of: 17.0Adc (6010A) 120Adc (6011A) 17.5Adc (6012B) 5.0Adc (6015A) Check that t

21 60Vdc (6012B) 200Vdc (6015A)d. Reduce the resistance of the load to draw an output current of: 17.0Adc (6010A) 120Adc (6011A) 17.5Adc (6012B)

226010A 6011ANOT APPLICABLE6012B 6015AFigure 2-6. 20KHz Noise, CV Peak-to-Peak PARDProceed as follows:a. Connect the test equipment as shown in Figu

23g. Check that the pulse width of the transient pulse is no more than:150mV/2ms (6010A)100mV/2ms (6011A)100mV/2ms (6012B)200mV/5ms (6015A) 6010A

24200Vdc (6010A)20.0Vdc (6011A)60.0Vdc (6012B)500Vdc (6015A)as read on the DVM.e. After 30 minutes stabilization, record the temperature to the neare

2517.5Adc (0.0175Vdc across Rm) (6012B) Check that the AMPS display reads about 17.5 amps.2Adc (0.20Vdc across Rm) (6015A) Check that the AMPS display

26load resistor that is capable of safely dissipating 1000 watts. Proceed as follows:a. Connect the test equipment as shown in Figure 2-8.b. Switch

273TroubleshootingMaintenance described herein is performed with power supplied to the instrument, and protective coversremoved. Such maintenance sho

28Table 3-1. Control Board Test Connector, A2J7PIN NO. SIGNAL NAME Vdc WAVEFORM/CONDITIONS SOURCEDigital-Circuits Bias & Reference Voltages24 +5

29Electrostatic ProtectionThe following caution outlines important precautions which should be observed when working with static sensitivecomponents i

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

30To avoid the possibility of personal injury, remove the power supply from operation before opening thecabinet. Turn off ac power and disconnect the

31When installing the A4 power mesh board, lower it vertically, placing its tab into the A1 board slot first, align the connectorand press in place.A5

32d. Lift the A1 board up and toward the rear, then remove the wires from the front panel switch A3S1.A1 Designator Wire color A3S1 Position (Rear Vi

33Make most voltage measurements (except DC-to-DC Converter and ac mains-connected circuits) referenced to the unit'soutput common. The output c

34Figure 3-1. Main Troubleshooting SetupAn isolation transformer provides ac voltage that is not referenced to earth ground, thereby reducing thepossi

35Figure 3-2. Modified Mains Cord Set For TroubleshootingWith the mains cord unplugged proceed as follows:a. Remove the top cover and the inside cove

36d. Place the front panel power-on switch in the off position. Remove the ac input cover from the rear panel and connect the"L" and "

37Table 3-2. No-Output Failures(Bias supplies and AC turn-on circuit functioning)Status of PFET on/off-PulsesPWM-ONA2J7-26PWM-OFFA2J7-25DEFECTIVEBOAR

38Troubleshooting Bias Supplies+5V on A2 Control Board. The PWM A2U22 includes a clock generator (40KHz set by A2R170, A2C79, and A2Q10),and a current

39Table 3 5. Performance Failure Symptoms (continued)SYMPTOMS DEFECTIVEBOARDCHECK FUNCTIONAL CIRCUITSCV overshoots A2 A2U5A, A2CR19, A2R62Output nois

40Input:NODE ( + ) NODE ( - ) MEASUREMENT SOURCEA2C55(+) A2C55(-)≈ 27VdcA1U4, AlC16 ( - )A1U4, AlC18 ( - ) (6011A)Outputs:NODE ( + ) N0DE ( - ) MEASUR

41A2U15-10 cycle power transition lo to hi at 2.9 sec(FAULTAC )A2Q7-C cycle power transition 5.0 to 0.3Vdc at 2.5 sec(ENABLERELAY )* NODE ( - ) = A2J

42Troubleshooting DC-To-DC ConverterParallel NOR gates A4U1, A4U2 and A4U3A act as drivers and switch on FETs A4Q1, Q2, Q3 and Q4 through pulsetransfo

43Figure 3-3. Waveforms

44Outputs:NODE ( + ) EXTERNAL SUPPLY MEASUREMENTA5C3 (+) ON/OFF 10VdcA5VR1(K) ON/OFF 6.5VdcA5U1-3 ON/OFF 0.2VdcA5CR2(K) OFF 1.8VdcA5CR2(K) ON 0.2VdcA5

45Circuits Included. Constant Current (CC) Circuit on A2 control board.Setup. The Main Troubleshooting Setup, page 33, except connect the external sup

474Principles of OperationAutoranging PowerAutoranging allows the unit to be compact and light weight and yet to deliver a range of output voltage/cur

48Regulation & Control SubsystemThis sub-system may be considered to be the brains of the unit. It provides the control pulses to open and close t

49Figure 4-1. 6010A and 6015A Simplified Schematic

5TABLE OF CONTENTSIntroduction ...

50Figure 4-1. 6011A and 6012B Simplified Schematic

51Table 4-1. Quick Reference Guide to Major CircuitsDependent CircuitsCircuit Major Function Input from Output to OperationBias PowerSupply (BPS)Pro

52Table 4-1. Quick Reference Guide to Major Circuits (continued)Dependent CircuitsCircuit Major Function Input from Output to OperationDrop out Detec

53diode A2CR24 is reversed biased but diode A2CR11 is forward biased and the CC Circuit provides the controlling signal.Similarly when CC Control Volt

54from the mains, converts it to dc and delivers this unregulated dc to the switching elements and internal control circuitry.Input power takes two di

55The Front Panel BoardFigure 4-3 is a simplified schematic of the front panel board. The V-MON, I-MON, and OVP signals are passed to the frontpanel b

56Figure 4-3. Simplified Front Panel Schematic

575Replaceable PartsIntroductionThis chapter contains information for ordering replacement parts. Table 5-3 lists parts in alpha-numeric order by refe

58Ordering InformationTo order a replacement part, address order or inquiry to your local Agilent Technolgies sales office. Specify the followinginfor

59Table 5-3. Replaceable Parts ListRef. Desig. Agilent Model Agilent Part Number DescriptionA1 6010A, 6011A 06030-61032 MAIN BOARD ASSEMBLYA1 6012B 0

6DC Power Conversion Subsystem...

60Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionC34 All 0160-6805fxd met 0.01µF 400VCB1 6010A

61Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR29,30 6010A 0811-1887 fxd ww .05 5% 10WR29,3

62Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionJ7,8 All 1251-0600 connector, single contactJ

63Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionC37 6010A, 6011A, 6015A NOT USEDC37 6012B 016

64Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionCR1-6 All 1901-0033 gen prp 180V 200maCR7,8 A

65Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR22 All 2100-3353 trimmer 20K 10%R23 All 2100

66Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR50 6010A, 6015A 0686-5135 fxd film 51K 5% 1/

67Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR77 All 0683-4715 fxd film 470 5% 1/4WR78 All

68Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR125 All 0757-0465 fxd film 100K 1% 1/8WR126

69Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR177 All 0683-0335 fxd film 3.3 5% 1/4WR178,1

71IntroductionScopeThis manual contains information for troubleshooting the Agilent Models 6010A, 6011A, 6012B, or 6015A 1000WAutoranging Power Supply

70Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionAll 1200-0485 IC socket (S1)All 1200-0181 ins

71Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR58 6010A 0698-0533 fxd film 4.64K 0.1% 1/8WR

72Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR97 All 2100-1775 var. ww. trimmer 5K 5%R98 6

73Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR9-11 All 0698-5139 fxd comp 3.9 5% 5WR12 All

74Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionCR3 6010A, 6012B, 6015A 1901-0050 diode-switc

75Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionR12 6010A, 6015A 0757-0447 fxd film 16.2K 1%

76Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionC104 6010A, 6011A, 6012B 0160-4281 fxd met 22

77Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionAll 5040-1626 DC output cover (ref. Barrier B

78Table 5-3. Replaceable Parts List (continued)Ref. Desig. Agilent Model Agilent Part Number DescriptionC28 6010A 0180-3703fxd elect 1500µF 250VC28 6

796Component Location and Circuit DiagramsThis chapter contains component location diagrams, schematics, and other drawings useful for maintenance of

8Manual RevisionsAgilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first twoletters ind

80Table 6-1. Schematic Diagram Notes1..denotes front-panel marking.2.denotes rear-panel marking.3. Complete reference designator consists of componen

81Table 6-1. Schematic Diagram Notes (continued)Pin locations for other semi-conductors are shown below:

82Figure 6-1. Top View, Top Covers Removed

83Figure 6-2. Main Board (A1) and Filter Board (A6) Component Location

84Figure 6-3. Control Board (A2) Component Location

85Figure 6-4. Front Panel Board (A3) Component Location

86Figure 6-5. FET Board (A4) Component Location

87Figure 6-6. Diode Board (A5) Component Location

89ASystem Option 002 (6010A, 6011A, 6012B)General InformationThis option facilitates the operation of the power supply in an automated system. Four ma

92Calibration and VerificationIntroductionThis section provides test and calibration procedures. The operation-verification tests comprise a short pro

90Table A-1. Specifications, Option 002Remote ProgrammingResistance Programming: 0 to 4 k ohm provides 0 to maximum rated voltage or current output.A

91Table A-1. Specifications, Option 002 (continued)Voltage Range: +4.75V to 16VCurrent Drain: 20mA maximumStatus Indicator output:Open collector outp

92Table A-1. Specifications, Option 002 (continued)Pulse TimingLow Bias or AC DROPOUT will go false after 5V supply stabilizes.Bias SuppliesDC Output

93InstallationWhen installing the board, perform the following steps:a. Remove the top and inner cover of the power supply as discussed in Section 3

94Figure A-1. Mating Connector AssemblyOperationThe following paragraphs provide the operating instructions necessary to interface a 002-equipped pow

95Figure A-2. 002 Option Rear Panel Connector J3 and Switches A1 and A2.Local/Remote ProgrammingWhen switching to local/ control, remember to set Fro

96Figure A-3. Accessing Local Programming while in Remote Programming ModeIf solid state circuitry is used, connect the Control Isolator Bias to a dr

97Figure A-4. Calculating Value of Series Dropping ResistorRemote Resistance ProgrammingCheck switches A1 and A2 on the rear panel, they must be in t

98Figure A-5. Remote Resistance ProgrammingFigure A-6. Voltage Programming of Output Voltage and Current

99Current Programming (Figure A-7). Check switches A1 and A2 on the rear panel, they must be in the correct positionsfor CV and CC current programming