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Agilent Technologies 4339B Service Manual

High resistance meter
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Agilent 4339B High Resistance Meter
Service Manual
SERIAL NUMBERS
This manual applies directly to instruments with serial number pre x JP1KD.
For additional important information about serial numbers, read
\Instruments Covered by This Manual" in Chapter 1 of this manual.
Agilent Part No. 04339-90043
Printed in JAPAN March 2001
Fourth Edition

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  • Page 1 Agilent 4339B High Resistance Meter Service Manual SERIAL NUMBERS This manual applies directly to instruments with serial number pre x JP1KD. For additional important information about serial numbers, read \Instruments Covered by This Manual" in Chapter 1 of this manual. Agilent Part No. 04339-90043...
  • Page 2 This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of the Agilent Technologies. Agilent Technologies Japan, Ltd.
  • Page 3 Manual Printing History August 1996 First Edition : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : July 1999 Second Edition (part number: 04339-90043) : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :...
  • Page 4 WARNINGS In addition it violates safety standards of design, manufacture, and intended use of the instrument. The Agilent Technologies assumes no liability for the customer's failure to comply with these requirements. Note 4339B is designed for use in INSTALLATION CATEGORY II according to IEC 61010-1 and POLLUTION DEGREE 1 according to IEC 61010-1 and IEC 60664-1.
  • Page 5 Dangerous Procedure Warnings Warnings , such as the example below, precede potentially dangerous procedures throughout this manual. Instructions contained in the warnings must be followed. Dangerous voltages, capable of causing death, are present in this Warning instrument. Use extreme caution when handling, testing, and adjusting this instrument.
  • Page 6 Agilent Technologies. Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent Technologies from another country.
  • Page 7 Exclusive Remedies The remedies provided herein are buyer's sole and exclusive remedies. Agilent Technologies shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory. Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products.
  • Page 8 Safety Symbols General de nitions of safety symbols used on equipment or in manuals are listed below. Instruction manual symbol: the product is marked with this symbol when it is necessary for the user to refer to the instruction manual. Alternating current. Direct current.
  • Page 9 4339Bs manufactured before the printing date of the manual. Appendix B Default Jumper and Switch Settings Appendix B describes the settings of the jumpers and switches on the 4339B A2 CPU Board Assembly. The information is required when the A2 assembly is replaced.

  • Page 11: Table Of Contents

    Contents 1. General Information Introduction ....... . . Instruments Covered by This Manual ..... Required Equipment .
  • Page 12 Keyboard Assembly Removal ......3-13 Removal Procedure ......3-13 LCD Assembly Removal .
  • Page 13 4-1. Ohm's Law ....... . 4-2. 4339B Overall Block Diagram ......

  • Page 15: General Information

    Complimentary copies of the supplement are available from Agilent Technologies. If the serial pre x or number of an instrument is lower than that on the title page of this manual, see .

  • Page 16: Required Equipment

    Required Equipment Table 1-1 lists the required equipment for adjusting and troubleshooting the 4339B. Table 1-2 lists the required language extensions to be used with the adjustment program. Table 1-1. Required Equipment Equipment Requirements Recommended Model Qty. Use Multimeter No Substitute...

  • Page 17: Adjustments Introduction

    Adjustments Introduction This chapter describes the adjustments required to ensure the 4339B is within its published speci cations after it has been repaired, or when it fails the performance tests. The adjustments should be performed along with periodic maintenance to keep the 4339B in optimum operating condition.

  • Page 18: Adjustment Tools

    EEPROM Write Protect Switch There are no EEPROM write protect switches in the 4339B. Related Adjustments There are two adjustments for the 4339B. Table 2-1 lists the adjustments that must be performed if an assembly has been replaced. Table 2-1. Related Adjustments...

  • Page 19: Adjustment Program

    The adjustment program listed in Table 1-1 is required for the adjustments. Using the program, the computer controls the 4339B and the other pieces of equipment to obtain the adjustment data, and stores the data in the 4339B's internal EEPROM, A2U1.

  • Page 20: Program Installation

    Program Installation The adjustment program must be installed in the computer using the following procedures. The installation can be divided into two stages, \Making a Working Copy" and \De ning the Con guration". Making a Working Copy Copy the contents of the adjustment program disk to a working disk or to the harddisk to prevent accidental deletion or destruction of the program les.
  • Page 21 Note If the adjustments being performed follow right after EEPROM replacement, change switch A2SW1-1 to \CLOSE", so that the 4339B will ignore the self test errors at power-on. (Return the switch to the \OPEN" position when the adjustments have been completed.) Refer to Figure B-1 for the switch location.

  • Page 22: Adjustments Procedure References

    Adjustments Procedure References This section provides supplemental information for the adjustments which are performed by the program. Connection instructions and some additional explanations are provided. Use this chapter as a reference when you perform the adjustments. Source Voltage Adjustment This adjustment updates the voltage source adjustment data stored in the EEPROM. Equipment Multimeter 3458A...
  • Page 23 1 2 3 4 0 1 0 1 Disable 4. Connect the Shunt Connector directly to the 4339B's \Ground" and \Guard" connectors. 5. Connect the V Measurement Adapter's \Output" cable to the 4339B \Output" connector. 6. Connect the V Measurement Adapter's \Interlock" cable to the 4339B \Interlock" connector.

  • Page 24: Ammeter Adjustment

    Figure 2-3. Ammeter Adjustment Setup 1/2 Perform the following steps as the program instructs. 1. Connect the RC Box Adapter's \Input" cable to the 4339B \Input" connector. 2. Connect the RC Box Adapter's \Output" cable to the 4339B \Output" connector.

  • Page 25: Setup 2/2

    3. Connect the other end of the Dual Banana-BNC(m) cable to the 3458A \INPUT". Caution To prevent electrostatic noise which may cause error in the adjustment data, do not move the RC Box Adapter cables while the 4339B is in measurement. Setup 2/2 This setup obtains the ammeter input resistance.

  • Page 27: Assembly Replacement Introduction

    This chapter provides the 4339B replaceable parts lists, and the step by step disassembly procedures for the major assemblies. Table 3-1 to Table 3-9 describe all the 4339B replaceable parts. The gure sections of Table 3-7 and Table 3-8 also shows the connections.

  • Page 28: Replacing The A2 Cpu Board Assembly

    ROM and EEPROM are not defective. The ROM transfer reduces parts cost for the repair, and the EEPROM transfer saves time from readjusting the 4339B. For this purpose, the A2 assembly can only be ordered without the ROM.
  • Page 29 Table 3-1. Replaceable Major Assembly List Reference Agilent Part Qty. Description Designation Number 04339-60002 Transformer 04339-66505 A5 AC Inlet Board Assembly 04263-80901 DC-DC Converter Unit 04339-66501 A1 Main Board Assembly 04339-69501 A1 Main Board Assembly (Exchange Assembly) 04263-66532 A2 CPU Board Assembly w/o ROM 04263-00604 Case Shield 0515-1550...

  • Page 30: A2 Cpu Board Assembly, Replaceable Assembly List

    Table 3-2. A2 CPU Board Assembly, Replaceable Assembly List Reference Agilent Part Qty. Description Designation Number 2110-1123 A2F1, Fuse SMT 2 A 1818-5146 A2U1, EEPROM 04339-85071 A2U11, ROM Rev. 1.04 Table 3-3. Replaceable Assembly List Reference Agilent Part Qty. Description Designation Number A1C500...

  • Page 31: Replaceable Mechanical Parts List

    Replaceable Mechanical Parts List The replaceable mechanical parts are listed in Table 3-4 to Table 3-7. Table 3-4. Replaceable Mechanical Parts List 1 Reference Agilent Part Qty . Description Designation Number 04339-04004 Cover 0363-0125 30 mm Gasket 5041-9167 Foot 1460-1345 Tilt Stand 04339-65020 Front Panel Assembly...

  • Page 32: Replaceable Mechanical Parts List

    Table 3-5. Replaceable Mechanical Parts List 2 Reference Agilent Part Qty. Description Designation Number 04339-61697 GPIB Connector with atcable 0515-1551 Screw M3 2110-0565 Fuse Holder 2110-0202 Fuse 0.25 A, Slow Blow (230V) 2110-0201 Fuse 0.5 A, Slow Blow (115V) 04339-00103 Chassis 2190-0054 Washer...

  • Page 33: Replaceable Mechanical Parts List

    Table 3-6. Replaceable Mechanical Parts List 3 Reference Agilent Part Qty. Description Designation Number 04339-25002 Support, Line Switch Plate 0515-0914 Screw M3L4 Flat Head 0515-1550 Screw M3 (for A3) 04339-25003 Stando (Hidden, for A3) 1400-1048 Edge Saddle 04339-00601 Case Shield 0361-1360 Rivet Nyron (for Shield) 04339-01202...

  • Page 34: Replaceable Mechanical Parts List

    Table 3-7. Replaceable Mechanical Parts List 4 Reference Agilent Part Qty. Description Designation Number 04339-61608 Wire Assy 04339-61607 Cable Assy 04339-24010 Sleeve 0890-0312 25 mm Tube, Heat Shrink 04339-25004 Core Holder 0515-1550 Screw M3 04339-61605 Cable Assy, Optical 04339-61614 Wire Assy (Binding Post) 04339-61606 Wire Assy, Black 0890-1806...

  • Page 35: Replaceable Mechanical Parts List

    Table 3-8. Replaceable Mechanical Parts List 5 Reference Agilent Part Qty. Description Designation Number 0160-7457 Capacitor 2200 pF 1.6 kV 1901-1250 Diode 04339-24013 Stick 04339-25008 Stud 0515-0914 Screw M3 Assembly Replacement...

  • Page 36: Replaceable Mechanical Parts List

    Table 3-9. Replaceable Mechanical Parts List 6 Reference Agilent Part Qty. Description Designation Number 04339-40003 Housing 04339-40004 Housing with Nut 0515-1550 Screw M3 3050-0891 Washer 04339-61651 Cable Assembly 04339-60003 Shunt Connector This part is included in the Shunt Connector Assembly, 4 This assembly consists of the part designated by 1 through 3.

  • Page 37: Disassembly Procedures

    The 4339B mechanical components are secured using metric threaded fasteners. Many fasteners in the 4339B may appear to be Phillips type, but they are in fact, Pozidrive type. To avoid damaging them, use only pozidrive screwdrivers to remove or tighten pozidrive type fasteners.

  • Page 38: A1 Main Board Removal

    Caution To avoid damaging on the optical ber cable caused by bending or other mechanical stress, remove all the ber cables from the 4339B when replacing either the A1 board or the A3 board. 5. Remove the cable clamp on the shield case which surrounds the A3 board.

  • Page 39: A3 Ammeter Board Assembly Removal

    Caution To avoid damaging on the optical ber cable caused by bending or other mechanical stress, remove all the ber cables from the 4339B when replacing either the A1 board or the A3 board. 5. Disconnect the cable assembly, which includes a core, from the front of the A3 board.

  • Page 40: Lcd Assembly Removal

    LCD Assembly Removal Removal Procedure 1. Remove the cover while referring to \Cover Removal". 2. Disconnect the two atcable assemblies and the wire assembly from the front side of the A2 board. 3. Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter Board Assembly.

  • Page 41: Triaxial Connector Removal

    Figure 3-2. Cable Assembly Connection for Interlock Connector Triaxial Connector Removal Caution When accessing the traiaxial connector, use lint free gloves to avoid contaminating the connector. Agilent Technologies supplies lint free gloves (Agilent PN 9300-0163). Removal Procedure 1. Remove the cover while referring to \Cover Removal".

  • Page 42: Bnc Connector Removal

    Removal Procedure Caution When accessing the BNC connector, use lint free gloves to avoid contaminating the connector. Agilent Technologies supplies lint free gloves (Agilent PN 9300-0163). 1. Remove the cover while referring to \Cover Removal". 2. Disconnect the two atcable assemblies and the wire assembly from the front side of the A2 board.

  • Page 43: Troubleshooting Introduction

    Troubleshooting Introduction This chapter provides assembly level troubleshooting information for the 4339B. The information includes theory of operation, and troubleshooting. Safety Considerations This chapter contains s and s that must be followed for your protection and WARNING CAUTION to avoid damaging the equipment.

  • Page 44: After Service Product Safety Checks

    0.1 . Flex the power cord while making this measurement to determine if any intermittent discontinuities exist. 3. Unplug the 4339B's power plug from the power source. Set the line switch to ON. Tie the line and neutral pins of the power connector together and check the resistance between them and enclosure.

  • Page 45: Theory Of Operation

    For example, if R = 1 G , and V = 1 V, the current owing is 1 nA (10 9 A). The 4339B High Resistance Meter is essentially a set of a voltage source and a very sensitive current meter.

  • Page 46: Overall Block Diagram

    Overall Block Diagram Figure 4-2 shows the overall block diagram of the 4339B. Figure 4-2. 4339B Overall Block Diagram The voltage source applies dc voltage which is set from the keyboard or by an GPIB command. The I-V converter which is directly connected to the input converts the current owing into to a voltage ramp of which slope is proportional to the input current.

  • Page 47: Analog Section

    The dc voltage source section applies measurement voltage to the series circuit consisting of the DUT and I-V Converter. The DUT is connected to the 4339B \Input" connector by a triaxial cable which is a three layered coaxial cable. This triaxial cable sheilds external noise and improves the contact check function accuracy.

  • Page 48: Dc Voltage Source Section

    DC Voltage Source Section The voltage source generates a dc voltage ranging from 0 V to 1,000 V. The voltage setting resolution is 0.1 V when the output is less than and equal to 200 V, and 1 V when the output is greater than 200 V.

  • Page 49: Ammeter Section

    Ammeter Section The ammeter section converts current owing into to corresponding digital data. The section includes an I-V converter, reference current source, and the Analog-to-Digital Converter. I-V Converter. Figure 4-5 shows the I-V converter block diagram. Figure 4-5. I-V Converter Block Diagram The I-V Converter is essentially an integrator composed of an operational ampli er and a capacitor.

  • Page 50: Digital Section

    For the same purpose, the A2 Assembly also communicates with the A3 Ammeter Assembly via the A1 Assembly and four optical bers. The GPIB interface on the A2 Assembly allows the 4339B communicate with a controller. The handler interface on the A1 Assembly allows the 4339B communicate with an external handler.

  • Page 51: Power Supply Section

    Varistor, VR1 protects the circuit from surge voltage on the line power. VR2 blows the fuse F1, if the 4339B is turned on with wrong line voltage setting selection, for example, 115V selection when using 230 V line voltage.

  • Page 52: Troubleshooting

    Troubleshooting Figure 4-8 shows the overall troubleshooting owchart to nd the defective assembly. Follow the owchart when troubleshooting. Refer to the \Check Procedure References" for detailed procedure to check each item. Refer to Chapter 3 for assembly replacement. Note Because of each assembly's high SMD (surface mount device) ratio, the repair should be done by assembly replacement.

  • Page 53: Troubleshooting Flow

    Figure 4-8. Troubleshooting Flow T roubleshooting 4-11...

  • Page 54: Check Procedure References

    Check 1, DC-DC Converter Output Voltage 1. Remove the cover referring to \Cover Removal" in Chapter 3. 2. Turn on the 4339B. 3. Using a multimeter, check to see if the voltages between the test pads (TPs), shown in Figure 4-9, on A1 Main Board Assembly are in the ranges listed in Table 4-1.

  • Page 55: Check 2, Lcd Displays Anything

    Check 2, LCD Displays Anything? 1. Turn o the 4339B. 2. Turn on the 4339B while watching the LCD. 3. Check for a beep sound for a moment and if you see anything is displayed on the LCD. 4. If beep sounds and LCD displays something, proceed to \Check 3, LCD Operates Correctly?", otherwise proceed to \Check 7, CPU Power LED Lights?".

  • Page 56: Check 7, Cpu Power Led Lights

    Check 8, Any Error Code on LED? 1. Turn o the 4339B. 2. Turn on the 4339B while watching the LEDs on the A2 CPU Board Assembly. 3. Check if the LEDs light as the sequence shown in Figure 4-10.

  • Page 57: Check 9, Cpu Fuse High Lead Voltage

    Figure 4-11. Location of High Lead of A2F1 Fuse Check 10, Fuse and Line Switch 1. Check that the fuse on the 4339B rear panel is not blown. 2. Check that the line switch on the A5 AC Inlet Board Assembly is not defective.

  • Page 58: Check 11, Dc-Dc Converter Input Voltage

    Check 11, DC-DC Converter Input Voltage 1. Turn on the 4339B. 2. Using a multimeter, check if the voltage between TP4 and TP3 (DC-DC Converter input voltage) on A1 Assembly is between +12 V and +15 Vdc. Refer to Figure 4-12 for the test pad locations.

  • Page 59: Check 12, Dc-Dc Converter Open Output Voltages

    Check 12, DC-DC Converter Open Output Voltages 1. Turn o the 4339B. 2. Disconnect the DC-DC Converter Output Cable shown in Figure 4-13 from connector \J12" on the A1 Main Board Assembly. 3. Turn the 4339B on. 4. Using a multimeter, check if the DC-DC Converter open output voltages on the output connector pins shown in Figure 4-13 are in the ranges shown in Table 4-2.

  • Page 60: Check 13, Transformer Secondary Voltage

    Check 13, Transformer Secondary Voltage 1. Turn o the 4339B. 2. Disconnect the transformer secondary connector from connector \J13" on the A1 Main Board Assembly. Refer to Figure 4-14 for the connector location. 3. Turn the 4339B on. 4. Using a multimeter, check if the transformer secondary voltage is between 13 V and 17 Vac.

  • Page 61: Manual Changes

    Manual Changes To adapt this manual to your 4339B, refer to Table A-1, and make all of the manual changes listed opposite your instrument's serial number. Instruments manufactured after the printing of this manual may be di erent from those documented in this manual.

  • Page 63: Default Jumper And Switch Settings

    Default Jumper and Switch Settings Introduction This appendix describes the setting of the jumpers and switches on the A2 CPU Board Assembly. Use this information when replacing the A2 Assembly. Jumper and Switch Settings Figure B-1 shows the default Jumper and Switch Settings. When the A2 CPU Board Assembly is replaced, set the jumpers and switches to the default side as shown in the gure.

  • Page 65: Index

    Index A1 Main Board Removal, 3-12 Instruments Covered by This Manual, 1-1 A2 CPU Board Assembly Removal, 3-12 Interlock Connector Removal, 3-14 A3 Ammeter Board Assembly Removal, 3-13 I-V Converter, 4-7 A5 AC Inlet Board Assembly Removal, 3-13 Adjustable Components, 2-2 Adjustment Program, 2-3 Keyboard Assembly Removal, 3-13 Adjustments, 2-1...

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