Agilent Technologies 6060B Service Manual
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Agilent Technologies 6060B Service Manual

300 watt single input electronic loads
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Agilent Part No. 5951-2828
Microfiche Part No. 5951-2829

SERVICE MANUAL

300 WATT SINGLE INPUT
ELECTRONIC LOADS
Agilent Technologies
Model 6060B and 6063B
For instruments with serial numbers
Agilent 6060B US37350101 and up
Agilent 6063B US37350101 and up
For instruments with higher serial numbers,
a change page may be included.
Printed in USA
Edition 2: February, 2000

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  • Page 1: Service Manual

    300 WATT SINGLE INPUT ELECTRONIC LOADS Agilent Technologies Model 6060B and 6063B For instruments with serial numbers Agilent 6060B US37350101 and up Agilent 6063B US37350101 and up For instruments with higher serial numbers, a change page may be included. Agilent Part No. 5951-2828 Printed in USA Microfiche Part No.
  • Page 2 Export price). If Agilent Technologies is unable, within a reasonable time to repair or replace any product to condition as warranted, the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies.

  • Page 3: Safety Summary

    Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.

  • Page 5: Table Of Contents

    Table of Contents Introduction .................................... 7 Scope ......................................7 Related Documents ................................... 7 Firmware Revisions .................................. 7 Manual Revisions ..................................7 Safety Considerations ................................8 Electrostatic Discharge ................................8 Verification....................................9 Introduction ....................................9 Test Equipment Required ................................. 9 CC Mode Test..................................10 CV Mode Test ..................................
  • Page 6 Heat Sinks................................... 60 PC Board .................................... 60 FETs Q1 and Q2 ..................................60 Principles Of Operation ............................... 61 Introduction .................................... 61 Bias Supplies ..................................61 Primary Interface ..................................61 Front Panel....................................61 Isolators ....................................63 Secondary Interface ................................63 DACs and Slew Rate Control ..............................63 CC/CV Control ..................................

  • Page 7: Introduction

    Manual Revisions Agilent instruments are identified by a two-part, ten-character serial number, such as 2847A-00101. The first five characters (e.g. 2847A) are the serial prefix, which is the same for all identically made instruments. The last five digits (e.g. 00101) is a unique serial number assigned to each instrument.

  • Page 8: Safety Considerations

    When working on the Electronic Load, observe all standard, anti-static work practices. These include, but are not limited to: • Working at a static-free station, such as a table covered with static-dissipative laminate or with an Agilent 9300-0797 conductive table mat.

  • Page 9: Verification

    Verification Introduction This chapter contains test procedures that check the operation and calibration of the Agilent 6060B and 6063B Electronic Loads. The tests are performed from the front panel and can be used to determine which circuits are faulty when troubleshooting.

  • Page 10: Cc Mode Test

    TEST troubleshooting procedures in Figure 3-1 in Chapter 3. If the readings are out of tolerance, calibrate the applicable current range (see Chapter 6 in the Operating Manual). Connect the Electronic Load, power supply (Agilent 6031A/6032A or equivalent), DMM, and the 0.010 ohm (6060B) or 0.100 ohm (6063B) current monitor resistor as shown in Figure 2-1.

  • Page 11: Cv Mode Test

    (see Chapter 6 in the Operating Manual). Connect the Electronic Load, power supply (Agilent 6035A or equivalent), and DMM as shown in Figure 2-2. Take care in making connections so that contact resistance voltage drop will not affect the readings.

  • Page 12: Cr Mode Test

    (see Chapter 6 in the Operating Manual). Connect the Electronic Load, power supply (Agilent 6032A/6035A or equivalent), and the 0.100 ohm current monitor resistor as shown in Figure 2-1. Use the DMM to measure the voltage across the monitor resistor and across the Electronic Load's input terminals.
  • Page 13 Measure the voltage across the monitor resistor and across the input terminals, then calculate the Electronic Load resistance. The result should be between: 6060B: 0.0416 and 0.0584 ohms. 6063B: 0.792 and 1.208 ohms. Check the middle ohms range as follows:...

  • Page 14: Transient Operation And Slew Circuit Test

    Use the test setup of Figure 2-1 except connect an oscilloscope across the 0.100 current monitor resistor in place of the DMM. Set power supply for: 6060B: 10V and 10A. 6063B: 10V and 15A. Recall the factory default values by pressing...

  • Page 15: Cc Mode Pard Test

    CC mode PARD (periodic and random deviations) is specified as the rms input current in a frequency range 20Hz to 10Mhz. This test checks CC Mode PARD. Connect the Electronic Load, power supply (Agilent 6032A or equivalent, DMM, and current probe as shown in Figure 2-3. Set power supply for 10V and >10A.
  • Page 16 This time the load should turn on with only ''OP" displayed. Reduce the power source output to 20 volts (6060B) or 35 volts (6063B). The display should change to "− − −" indicating that the protection shutdown and overpower conditions are cleared.
  • Page 17 PERFORMANCE TEST RECORD - Agilent 6060B ELECTRONIC LOAD (Page 1 of 2) Test Facility: ________________________________________________ Report No._____________________________________ ________________________________________________ Date__________________________________________ ________________________________________________ Customer______________________________________ ________________________________________________ Tested by______________________________________ Model Agilent 6060B Ambient temperature __________________________°C Serial No._________________________________________ Relative humidity_____________________________% Options___________________________________________ Line frequency______________________Hz (nominal) Firmware Rev._____________________________________...

  • Page 18: Readback

    PERFORMANCE TEST RECORD - Agilent 6060B ELECTRONIC LOAD (Page 2 of 2) Model Agilent 6060B Report No.____________________ Date______________________________ Test Description Minimum Results Maximum Measurement Specification Specification Uncertainty CONSTANT CURRENT MODE TESTS 60 Ampere Range Programming and Readback High Current (60A) 59.865...
  • Page 19 PERFORMANCE TEST RECORD - Agilent 6063B ELECTRONIC LOAD (Page 1 of 2) Test Facility: ________________________________________________ Report No._____________________________________ ________________________________________________ Date__________________________________________ ________________________________________________ Customer______________________________________ ________________________________________________ Tested by______________________________________ Model Agilent 6063B Ambient temperature __________________________°C Serial No._________________________________________ Relative humidity _____________________________% Options___________________________________________ Line frequency ______________________Hz (nominal) Firmware Rev._____________________________________...
  • Page 20 PERFORMANCE TEST RECORD - Agilent 6063B ELECTRONIC LOAD (Page 2 of 2) Model Agilent 6063B Report No.____________________ Date______________________________ Test Description Minimum Results Maximum Measurement Specification Specification Uncertainty CONSTANT CURRENT MODE TESTS 10 Ampere Range Programming and Readback High Current (10A) 9.975...

  • Page 21: Troubleshooting

    Introduction This chapter provides troubleshooting and repair information for the Agilent 6060B and 6063B Electronic Loads. Before attempting to troubleshoot the Electronic Load, ensure that the problem is with the load itself and not with an associated circuit, power source, or power line.

  • Page 22: Selftest Sequence And Error Messages

    Table 3-1 Test Equipment Required for Troubleshooting Type Purpose Recommend Model GP-IB Controller Communicate with the load via the GP-IB Agilent 9825, Series 85, Series 200/300 Signature Analyzer Test most of the primary and secondary circuits Agilent 5005A/B Digital Voltmeter Check various voltage levels...
  • Page 23 Figure 3-1. Overall Troubleshooting Flowchart (Sheet 1 of 3)
  • Page 24 Figure 3-1. Overall Troubleshooting Flowchart (Sheet 2 of 3)
  • Page 25 Figure 3-1. Overall Troubleshooting Flowchart (Sheet 3 of 3)

  • Page 26: Secondary Interface

    If part 1 passes selftest, the test continues and checks the read/write cycles and the internal trigger circuit. If these tests pass, the secondary interface selftest are performed. If the read/write or internal trigger test fails, the front panel displays "ERROR x" for two seconds, then normal voltage/current will be displayed and the Err annunciator will turn on.

  • Page 27: Test Points

    Table 3-2. Selftest Error Code Code Error Description Procedure The primary microprocessor U203 read/write test to Use Primary S.A. Test Tables 3-4 and 3-6 to check the GP-IB talker/listener chip U202 failed. address and data lines. The primary microprocessor U203 test of the internal Use Primary S.A.
  • Page 28 U214-3 CV PROG In VOLT MODE, + 10V with full rated voltage programmed; +0.5V U308-1 with 3 volts programmed (6060B), or with 12 volts programmed (6063B). In CURR MODE or RES MODE (middle and high ohm ranges), + 13V. In RES MODE (low ohm range), < 1V.
  • Page 29 IPROG Under normal operating conditions (input is regulated) measurement U8-5 should be approximately: -0.1V X Iin (6060B). 0.67V X Iin (6063B). With input unregulated or disconnected, the measurement will be: 0V in CURR Mode. +0.9V in VOLT or RES MODE.
  • Page 30 High level when the low current range, the low resistance range, or the high resistance range is programmed. -VMON -0.167 X Input Voltage (6060B). U5-7 -0.0418 X Input Voltage (6063B). + OP - 0.9V (full rated voltage input) to - 6V (zero volts input) when the OP D11 -cath condition is false.

  • Page 31: Signature Analysis

    30 DISP L$ 40 END The computer will display the Electronic Load Agilent part number and the firmware revision of the U205 primary ROM chip. The signatures given in Secondary S.A. Tables 3-8 through 3-12 are valid for secondary interface microprocessor chip U301 revision "Rev A.02.01"...

  • Page 32: Test Header Jumper Positions

    Test Header Jumper Positions The Electronic Load contains two test headers (connectors TP201 and TP301) with jumper positions for signature analysis testing and for other functions as described below. The test headers are located on the main circuit board (see Figure 6-3) and are accessible when the top cover is removed.

  • Page 33: Test Setup For Signature Analysis

    Test Setup for Signature Analysis Figure 3-2 illustrates the primary (TP201) and secondary (TP301) test header connections required to perform the S.A. Tests given in Tables 3-4 through 3-12. The following is a description of the test setup: Turn off the Electronic Load and gain access to the main circuit board by removing the top cover (see "Disassembly Procedures").

  • Page 34: Test Headers

    Figure 3-2. Test Headers Test Setup for Signature Analysis...
  • Page 35 Table 3-4. Primary Interface S.A. Test No. 1 Description : These signatures check primary microprocessor U203, ROM U205, and RAM U206. The signatures are valid for ROM U205 firmware revision "Rev A.02.01". Use the test setup described in "Test Setup for S.A.". Connect the signature analyzer's CLOCK input to U207-11.

  • Page 36: Primary Interface

    Table 3-5. Primary Interface S.A. Test No. 2 Description : These signatures check the GP-IB talker/listener IC U202. The signatures are valid for ROM U205 firmware revision "Rev A.02.01". Use the test setup described in "Test Setup for S.A." Connect the signature analyzer's CLOCK input to TP201-11.
  • Page 37 Table 3-6. Primary Interface S.A. Test No. 3 Description: These signatures check the front panel interface IC's U208 U209, U210 and U212. The signatures are valid for ROM U205 firrnware revision "Rev A.02.01". Use the test setup described in "Test Setup for S.A.''. Connect the signature analyzer's CLOCK input to the chip select line of the IC under test as specified below.
  • Page 38 Table 3-7. Primary Interface S.A. Test No. 4 Description: These signatures check the operation of the primary trigger circuits. The signatures are valid for ROM U205 firmware revision "Rev A.02.01". Use the test setup described in ''Test Setup for S.A.". Connect the signature analyzer's CLOCK input to TP201-11.

  • Page 39: Secondary Interface

    Table 3-8. Secondary Interface S.A. Test No. 1 Description: These signatures check secondary microprocessor U301 and latches U302 and U330. The signatures are valid for U301 firrnware revisions ''Rev A.02.01". Use the test setup described in "Test Setup for S.A. " Signatures: +5V signature = H82C U301...
  • Page 40 Table 3-9. Secondary Interface S.A. Test No. 2 Description : These signatures check main DAC U320, transient DAC U321, and secondary data bus B latches U319. The signatures are valid for U301 firmware revisions "Rev A.02.01". Use the test setup described in "Test Setup for S.A.". Signatures: U319 U320...
  • Page 41 Table 3-10. Secondary Interface S.A. Test No. 3 Description: These signatures check transient generator IC's U310 through U316. The signatures are valid for U301 Signatures: U311-20 U310-20 U313-20 U312-16 U316-6,7,8 U315-16 U314-14 Common U311-10 U310-10 U313-10 U312-8 U316-4,5,18 U315-8 U314-7 SD(0) U311-3 = UFOA U310-3 = UFOA...
  • Page 42 Table 3-11. Secondary Interface S.A. Test No. 4 Description: These signatures check the readback DAC U322, slew rate decoder U305, and analog switch U317. The signatures are valid for U301 firmware versions "Rev A.02.01". Use the test setup described in "Test Setup for S.A.".

  • Page 43: Dac Circuits Troubleshooting (Figure 3-3)

    Table 3-12. Secondary Interface S.A. Test No. 5 Description : These signatures check the chip select IC U304 and the status readback IC U303. The signatures are valid for U301 firmware revisions "Rev A.02.01". Use the test setup described in the ''Test Setup for S.A.". Signatures : U303-16 U304-6,16...
  • Page 44 Figure 3-3. DAC Circuits Troubleshooting...

  • Page 45: Slew Circuit Troubleshooting (Figure 3-4)

    Tran Level = 10 Freq = 80 Dcycle = 50 Tran on/off = on Slew = .001 (Slew Rate #1) 6060B Slew = .5 (Slew Rate #9) only Slew = 2.5 (Slew Rate #11) The three slew rates programmed from the front panel toggle all four switches in the slew circuit. Refer to the following table if you need to check the state of the switches for a specific slew rate.

  • Page 46: Cc/Cv Control Circuit Troubleshooting (Figure 3-5)

    SLEW RATE SWITCH SETTINGS Refer to Module Operating Manual for Slew Rate Steps Slew Rate SLW1 SLW2 SLW3 SLW4 CC/CV CONTROL CIRCUIT TROUBLESHOOTING (Figure 3-5) Depending upon which operating mode (and range in the CR mode) is selected, either the CC or the CV loop controls the conduction of the input power stages.
  • Page 47 Figure 3-4A. Slew Circuits Troubleshooting for 6060B...
  • Page 48 Figure 3-4B. Slew Circuits Troubleshooting for 6063B...
  • Page 49 Figure 3-5. CC/CV Control Circuits Troubleshooting...

  • Page 50: Input Power Stages Troubleshooting (Figure 3-6)

    Input Power Stages Troubleshooting (Figure 3-6) There are eight identical input power stages connected in parallel. Figure 3-6 shows one of the eight. This stage consists primarily of a power FET (in quad array Q1), a monitor amplifier (U14) and an error amplifier (U1). Schematic details are shown on Figure 6-1, sheet 6.

  • Page 51: Transient Generator Troubleshooting (Figure 3-7)

    Transient Generator Troubleshooting (Figure 3-7) The transient generator (U310-U316) allows the input power stages to switch between two load levels. It produces the HIGH control which is sent to the DAC circuits to switch the transient DAC output. Troubleshooting the transient circuit consists of performing the general troubleshooting procedures if the transient circuit will not perform any functions, or performing the frequency or toggle/pulse mode troubleshooting if there is a problem in those areas.
  • Page 52 Figure 3-7. Transient Generator Troubleshooting...

  • Page 53: Trigger Circuit Troubleshooting (Figure 3-8)

    During the pauses, use a logic probe to make the following checks: Toggle Mode Pulse Mode U313-3 = LO U313-4 = HI U312-3 = LO U313-14 = toggling U316-9, 11, 14 = LO U315-13 = toggling U316-12 = HI After the pause, press "Continue" to generate the next trigger. CHECKOUT TABLE RESULT use scope...
  • Page 54 PROGRAM 1 10 OUTPUT 705;"TRAN:MODE PULS" 20 OUTPUT 705;"TRIG:SOUR BUS" 30 OUTPUT 705;"*TRG" 40 WAIT .5 50 GO TO 30 60 END The second program is used to toggle the lines labeled ON_LEV and ON_RUN as well as the ON_TRIG lines on Figure 3- 8 when the program is run.

  • Page 55: Overcurrent Circuit Troubleshooting (Figure 3-9)

    This causes the voltage at U8-6 to decrease from - 7 volts to - 0.8 volts. At an input of 65 volts (6060B); 260 volts (6063B), diode D13 turns on and holds U8-6 at - 0.8 volts and limits the maximum input current capability to less than 11 amps (6060B);...

  • Page 56: Overpower Circuit Troubleshooting (Figure 3-10)

    Overpower Circuit Troubleshooting (Figure 3-10) This circuit limits the power sinking capability of the load to either one to two minutes or 50 milliseconds, depending on the temperature of the heatsink assembly. The circuit monitors the input voltage and current to determine if an overpower condition exists. The circuit consists of amplifier U12, the four comparators U7, and summing resistor pack R123.

  • Page 57: Post Repair Calibration

    EEPROM chip (U211) is replaced, the load must be reinitialized with the proper constants by programming the following commands in the order indicated. After it has been initialized, the Electronic Load must be recalibrated as described in Chapter 6 of the Operating Manual. 6060B "CAL 1 " turn calibration mode on "CAL:INIT 60,60"...

  • Page 58: Disassembly Procedures

    6063B "CAL 1" turn calibration mode on "CAL:INIT 240,60" initialize default calibration parameters "CAL:SAVE" store calibration constants in EEROM "DIAG:CAL 0,6063" model number "DIAG:CAL 1,16901" model number suffix and GP-IB address 5 "DIAG:CAL 2l,0" initial *SRE value "DIAG:CAL 22,0" initial *ESE value "DIAG:CAL 23,1"...

  • Page 59: Front Panel

    Front Panel 1. Remove the two front feet. 2. Disconnect the keypad cable from J203, the LCD display cable from J202, and the power cable from J553. Note: When reconnecting the front panel display and keypad cables, be sure to line up the cable stripes as indicated on the main pc board.

  • Page 60: Heat Sinks

    Heat Sinks Follow the same procedure for each heat sink. 1. Remove the six screws securing the heatsink cover and remove the cover. 2. Remove the fan. 3. Remove the two screws securing the heat sink to the pc board. 4.

  • Page 61: Principles Of Operation

    Principles Of Operation Introduction Figure 4-1 is a block diagram illustrating the major circuits contained within the Electronic Load. Each block on the diagram identifies the schematic diagram sheet where the circuits are shown in detail. The schematic diagram (Figure 6-1) consists of fold out sheets which are located in Chapter 6 at the end of this manual.
  • Page 62 Figure 4-1. Agilent 6060A Electronic Load, Block Diagram...

  • Page 63: Isolators

    Isolators Data is transferred serially between the primary interface and the secondary interface via optical isolators. As described above, the primary interface circuits are referenced to chassis ground while the secondary interface and input power circuits are reference to load common. Neither of the load's input terminals ( + or - ) can exceed ± 240Vdc from ground. The trigger signal is also transferred from the primary interface via an optical isolator.

  • Page 64: Protection Circuits

    Protection Circuits The load includes overvoltage (OV), overpower (OP), overcurrent (OC) and overtemperature (OT) protection. The OV circuit takes control of the input power stages when an overload condition occurs. If the input voltage exceeds 75V, the overload circuit will cause the input stages to increase current flow in order to limit the input voltage. The OV circuit does not turn off the input power stages.

  • Page 65: Replaceable Parts

    Meta1 Oxide With How To Order Parts You can order parts from your local Agilent Technologies sales office (refer to the list at the end of this manual for the office nearest you). when ordering parts, include the following information: •...
  • Page 66 Table 5-3. Agilent 6060B/6063B Parts List - Electrical Reference Models Agilent Part Description Designation Number 6060B 06060-60024 MAIN BOARD 6063B 06063-60024 MAIN BOARD C1-8 BOTH 0160-4820 CAP-FXD 1800pF ± 5% 100V BOTH 0160-5098 CAP-FXD 0.22uF ± 10% 50V 6060B 0160-4833 CAP-FXD 0.022uF ±...
  • Page 67 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number 6060B 0160-4787 CAP-FXD 22pF ± 5% l00V 6063B 0160-4807 CAP-FXD 33pF ± 5% 100V 6060B 0160-4787 CAP-FXD 22pF ± 5% 100V 6063B 0160-4807 CAP-FXD 33pF ± 5% 100V...
  • Page 68 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number C357 BOTH 0160-4820 CAP-FXD 1800pF ± 5% 100V C358 BOTH 0160-4829 CAP-FXD 680pF ± 10% 100V C370 BOTH 0160-4832 CAP-FXD 0.01 µ F ± 10% 100V...
  • Page 69 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number Ql,2 6060B 1858-0137 TRANSISTOR - FET ASSEMBLY Ql,2 6063B 1855-0819 TRANSISTOR - FET ASSEMBLY BOTH 1855-0386 TRANSISTOR J-FET 2N4392 N-CHAN D-MODE BOTH 1854-0635 TRANSISTOR NPN SI...
  • Page 70 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number BOTH 0699-0486 RESISTOR 2K ± 0.1% .1W 6060B 0698-3450 RESISTOR 42.2K ± 1% .125W 6063B 0757-0458 RESISTOR 51.1K ± 1% .125W 6060B 0698-6629 RESISTOR 60K ± 0.1% .125W...
  • Page 71 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number R115 BOTH 0757-0416 RESISTOR 511 ± 1% .125W R116 BOTH 0757-0472 RESISTOR 200K ± 1% .125W R117 6060B 0698-6360 RESISTOR 10K ± 0.1% .125W...
  • Page 72 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number R203,204 BOTH 0757-0280 RESISTOR 1K ± 1% .125W R205 BOTH 0757-0442 RESISTOR 10K ± 1% .125W R208 BOTH 0698-3633 RESISTOR 390 ± 5% 2W MO...
  • Page 73 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number R344 BOTH 0757-0449 RESISTOR 20K ± 1% .125W R345 BOTH 0699-0924 RESISTOR 11K ± 0.1% .125W R346 BOTH 0698-6533 RESISTOR 12.5K ± 0-1% .125W...
  • Page 74 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number R600 BOTH 0698-8827 RESISTOR 1M ± 1% .125W R601 BOTH 1810-0278 NETWORK-RES 10-SIP 3.3K OHM X 9 RT201 BOTH 0837-0412 THERMISTOR TUB WITH AXL LEADS 10K-OHM...
  • Page 75 Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number U309 BOTH 1826-0850 ANALOG SWITCH-PIN U310,311 BOTH 1820-3082 IC FF CMOS/HC D-TYPE POS-EDGE-TRIG COM U312 BOTH 1820-6774 IC CNTR CMOS/HC BIN SYNCHRO U313 BOTH...

  • Page 76: Lcd Display

    Table 5-3. Agilent 6060B/6063B Parts List - Electrical (continued) Reference Models Agilent Part Description Designation Number BOTH 06063-60001 FRONT PANEL ASSEMBLY BOTH 5020-2693 PC BOARD ( keypad ) BOTH 5061-3473 LCD DISPLAY BOTH 5060-3193 WIRE KIT (main board to J551 ac receptacle)
  • Page 77 Table 5-4. Agilent 6060B/6063B Parts List - Mechanical (continued) Reference Models Part Number Description Designators MP21 BOTH 0535-0020 NUT ( binding post ) MP22 BOTH 3050-1320 WASHER - SPRING STEEL ( binding post ) MP23 BOTH 06060-00006 BRACKET ( heatsink )
  • Page 78 Figure 5-1. Chassis Mounted Component Locations...

  • Page 79: Diagrams

    Diagrams Introduction This chapter contains the schematic diagrams, test point location diagram, component location diagrams, and related tabular information useful for maintenance of the Electronic Load. For wiring connections to external equipment, see the Operating Manual. Schematic Diagram Figure 6-1 is the schematic diagram (foldout sheets) of the Electronic load. Notes that apply to all of the schematic sheets are given in Table 6-1.

  • Page 80: Test Point Locations

    Unterminated signal lines simply go to another location of the same schematic sheet (see Table 6-3). The following is an example of such a signal. —————————— TRIG □ 7. Values of resistors and capacitors that are enclosed by a heavy rectangle apply to model 6060B only. Refer to the parts list for the model 6063B values.
  • Page 81 Table 6-2. Schematic Diagram, Inter-Sheet Signal Connections Signal Sheet and Coordinates Mnemonic Function ACLR* Analog circuits clear (D) CC_PROG Programming voltage for CC mode (A) CCVTST Comparator output, main DAC self-test (D) 1 k/10 k Ω range select (D) CV_PROG Programming voltage for CV mode (A) 1 Ω...

  • Page 82: Turnon

    Table 6-2. Schematic Diagram, Inter-Sheet Signal Connections (continued) Signal Sheet and Coordinates Mnemonic Function OPTO_PCLR* Opto couplers power-on disable (D) Overvoltage status (D) PCLR Primary power-on clear (D) PCLR* Primary power-on clear (D) PORT PORT output (D) Range select (D) Input bus +sense (A) from (TB301-1) Input bus - sense (A) from (TB301-2) SD(0:7)
  • Page 83 Table 6-3. Schematic Diagram, Intra-Sheet Signals Signal Location Mnemonic Function Sheet Coordinates CAL_LOCK Software calibration lockout (D) CSP0* Test point , 8C CSP1* GP-IB interface write (D) , 6B, 8C CSP2* GP-IB interface read (D) , 6B, 8C CSP3* Keyboard readback chip select (D) , 6B CSP4* Keyboard driver chip select (D)
  • Page 84 Table 6-3. Schematic Diagram, Intra-Sheet Signals (continued) Signal Location Mnemonic Function Sheet Coordinates RCK_HI* Loads transient generator counter (D) , 7A S0, S1, S2 Chip select decoder input (D) SA_EN* Enable SA(D) , 8D Skip self test input signal (D) SLW1 Slew circuit switch control (D) SLW2...

  • Page 85: Line Switch

    LINE SWITCH REAR VIEW Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 1 of 6)
  • Page 86 Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 2 of 6)
  • Page 87 Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 3 of 6)
  • Page 88 Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 4 of 6)
  • Page 89 Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 5 of 6)
  • Page 90 Figure 6-1. 6060B/6063B Electronic Load Schematic (Sheet 6 of 6)
  • Page 91 R155 IMON ADJUST DMM IMON ADJUST...

  • Page 92: Manual Backdating

    Note that for some changes, you may be instructed to update the instrument if certain components are being replaced during repair. Change 1 6060B Make the following changes in Table 5-3: Change: A1 (6060B) main board to p/n 06060-60023 Serial Prefix Serial Number Changes 3119A...

  • Page 93: Index

    INDEX AC receptacle................................58 Bias supplies................................21, 61 Binding posts................................59 Calibration ..................................57 CC mode test................................10 CC/CV control................................63 Chassis mounted components............................78 CR mode test................................12 Current limit.................................55 CV mode test................................11 DAC circuits................................43, 61 Disassembly ................................58 EEPROM................................57, 61 Electrostatic discharge....
  • Page 94 LCD display.................................59 Line switch ..................................59 Manual revisions................................7 Overall troubleshooting...............................21 Overcurrent................................55, 64 Overpower................................56, 64 PARD test..................................15 Parts list.................................65, 76 PC board..................................60 Power limit................................15, 56 Primary interface..............................22, 61 Protection circuits................................64 Readback..................................64 Related documents.................................7 Schematics..................................Secondary interface..............................26, 61 Selftest......
  • Page 95 Agilent Sales and Support Office For more information about Agilent Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the following centers and ask for a test and measurement sales representative.

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