Agilent Technologies 4263B LCR Service Manual
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Agilent Technologies 4263B LCR Service Manual

Agilent Technologies 4263B LCR Service Manual

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Agilent 4263B LCR Meter
Service Manual
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.

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Summary of Contents for Agilent Technologies 4263B LCR

  • Page 1 Agilent 4263B LCR Meter Service Manual 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.
  • 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 Company. Agilent Technologies Japan, Ltd.
  • Page 3 Manual Printing History August 1996 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : First Edition (part number: 04263-90033) June 2000 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Second Edition (part number: 04263-90033)
  • Page 4 WARNINGS elsewhere in this manual may impair the protection provided by the equipment. In addition it violates safety standards of design, manufacture, and intended use of the instrument. The Agilent Technologies Company assumes no liability for the customer's failure to comply with these requirements. Note 4263B complies with INSTALLATION CATEGORY II and POLLUTION DEGREE 2 in IEC1010-1.
  • Page 5 Certi cation Agilent Technologies Company certi es that this product met its published speci cations at the time of shipment from the factory. Agilent Technologies further certi es that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institution's calibration facility, or to the calibration facilities of other International Standards Organization members.
  • Page 6 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 7 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 8 Service Manual (Agilent Part Number: 04263-90033) explains how to adjust, troubleshoot, and repair the 4263B. How To Use This Manual This is the Service Manual for the 4263B LCR Meter. This manual contains adjustments and repair information, and consists of the following four chapters. Chapter 1 General Information Chapter 1 gives general information for servicing the 4263B.

  • Page 9: Table Of Contents

    Contents Introduction ....... . . Instruments Covered by This Manual ..... Required Equipment .
  • Page 10 A5 AC Inlet Board Assembly Removal ....3-10 Removal Procedure ......3-10 Keyboard Assembly Removal .
  • Page 11 Figures 1-1. Serial Number Label ......2-1. Adjustment Program Flow ......2-2.

  • Page 13: Introduction

    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 Appendix A, Manual Changes . For information concerning, a serial number pre x that is not listed on the title page or in the Manual Change supplement, contact the nearest Agilent Technologies oce.

  • Page 14: Required Equipment

    Required Equipment Table 1-1 lists the required equipment for adjusting and troubleshooting the 4263B. Table 1-2 lists the required language extensions to be used with the adjustment program. Multimeter AC V Accuracy: < 2.5% 3458A or 3478A (at 100 kHz) Standard Resistors No Substitute 42030A...

  • Page 15: Introduction

    Adjustments Introduction This chapter describes the adjustments required to ensure the 4263B 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 4263B in optimum operating condition.

  • Page 16: Adjustment Tools

    Adjustment Tools No hand tools are required for the adjustments. Adjustable Components There are no adjustable components, such as variable capacitors or variable resistors, in the 4263B. All adjustments are performed by updating the adjustment data stored in the internal EEPROM.

  • Page 17: Adjustment Program

    Adjustment Program The adjustment program listed in Table 1-1 is required for the adjustments. Using the program, the computer controls the 4263B and the other pieces of equipment to obtain the adjustment data, and stores the data in the 4263B internal EEPROM, A2U1. The adjustment program runs on the computer listed in Table 1-1.
  • Page 18 Impedance obtains the data to adjust the actual measurement impedance to the Measurement 1m standards' value, when the 1m test leads are used. This adjustment Adjustment should be performed if the performance test, Impedance Measurement Accuracy Test, fails. Perform the Impedance Measurement 0m Adjustment prior to this adjustment.

  • Page 19: 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 the program les from accidental deletion or destruction.
  • Page 20 Note In the program, the 4263B is referred as \UUT". Note If the adjustment being performed follows right after EEPROM replacement, change switch A2SW1-1 to \CLOSE", so that the 4263B will ignore the self test errors at power-on. (Return the switch to \OPEN" when the adjustment has been completed.) Refer to Figure B-1 for the switch location.

  • Page 21: 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 performing the adjustments. A adjustment of the 4263B consists of the following ve adjustments. Signal Source Level Adjustment Impedance Measurement 0m Adjustment Impedance Measurement 1m Adjustment...

  • Page 22: Impedance Measurement 0M Adjustment

    Impedance Measurement 0m Adjustment This adjustment updates the data to adjust the measurement impedance to the standard values, when no test leads are used. Note Perform the Signal Source Level Adjustment prior to performing this adjustment. Equipment Standard Resistors 42030A Open Termination 42090A Short Termination...

  • Page 23: Impedance Measurement 1M Adjustment

    Impedance Measurement 1m Adjustment This adjustment updates the data to adjust the measurement impedance to the standard values, when the 1m test leads are used. Note Perform the Impedance Measurement 0m Adjustment prior to performing this adjustment. Equipment Standard Resistors 42030A Open Termination 42090A...

  • Page 24: Impedance Measurement 2M Adjustment

    2. Connect four BNC(f)-BNC(f) Adapters directly to another end of the 16048A. 3. Connect the speci ed termination or standard resistor directly to the 4263B UNKNOWN Connectors. 4. Repeat step 3 as instructed. Impedance Measurement 2m Adjustment This adjustment updates the data to adjust the measurement impedance to the standard values, when the 2m test leads are used.

  • Page 25: Introduction

    The gure section of Table 3-7 also shows the cable connections. Ordering Information To order a part listed in the replaceable parts lists, quote the Agilent Technologies part number, indicate the quantity required, and address the order to the nearest Agilent Technologies oce.

  • Page 26: Replacing The A2 Cpu Board Assembly

    Replacing the A2 CPU Board Assembly The A2 CPU Board Assembly has a ROM for the rmware and an EEPROM for the adjustment data and user data. Both ROM and EEPROM are mounted in sockets for easy replacement. If the A2 assembly is replaced, the ROM and EEPROM may be transferred from the defective assembly to the new assembly as long as the ROM and EEPROM are not defective.
  • Page 27 04263-66505 A5 AC Inlet Board Assembly 04263-60004 Transformer Assembly 04263-80901 DC-DC Converter Unit 04263-66532 A2 CPU Board Assembly w/o ROM 04263-00604 Case Shield 0515-1550 Screw M3 04263-66504 A4 Keyboard Assembly 04263-25151 Rubber Key 0515-1550 Screw M3 04263-61010 LCD Assembly 04263-25003 Filter Transparent 0515-1550 Screw M3...
  • Page 28 2110-1123 A2F1, Fuse SMT 2 A 1818-5146 A2U1, EEPROM 04263-85041 A2U11, ROM Rev. 1.01 A1C500 0180-4334 Capacitor, 22000  F (for power supply) A1C501 0180-4334 Capacitor, 22000  F (for power supply) A5SW1 3101-3173 Line Switch A5VR1 0837-0237 Varistor A5VR2 0837-0237 Varistor Assembly Replacement...

  • Page 29: Replaceable Mechanical Parts List

    Replaceable Mechanical Parts List The replaceable mechanical parts are listed in Table 3-4 to Table 3-7. Reference Agilent Part Qty. Description Designation Number 04263-04004 Cover 5041-9167 Foot 1460-1345 Tilt Stand 04263-65020 Front Panel Assembly 5041-9170 Trim Side 0515-0914 Screw M3 (Hidden) 04263-40001 Front Bezel 04263-00605...
  • Page 30 04263-61615 GPIB Connector with atcable 1250-0083 BNC Connector, Ext DC Bias 0360-1190 Lug Terminal (Hidden) 2190-0016 Washer (Hidden) 2950-0001 2110-0565 Fuse Holder 2110-0202 Fuse 0.25 A, Slow Blow (230V) 2110-0201 Fuse 0.5 A, Slow Blow (115V) 0515-1551 Screw M3 04263-00102 Chassis 2190-0054 Washer...
  • Page 31 0515-2079 Screw M4 (on the Chassis) 04263-24001 Nut Rod (for Transformer) 2190-0586 Washer Spring M4 04263-00607 Plate Shield 04263-24002 Nut Rod (for DC-DC Conv.) 2190-0584 Washer Spring M3 0515-1550 Screw M3 (for A1 and A2) 04339-24006 Stando (Hidden, for A1) 5040-3347 Plate (Hidden, Chassis Reverse side) 0460-0616...
  • Page 32 04263-61608 Wire Assy (V Selector) 04263-61607 Wire Assy (Ext DC Bias) 04263-61602 Cable Assembly, \A"-\A" 04339-25004 Core Holder 0515-1551 Screw M3 04263-61604 Cable Assembly, \B"-\B" 04339-25004 Core Holder 0515-1551 Screw M3 04263-61605 Cable Assembly, \C"-\C" 04339-25004 Core Holder 0515-1551 Screw M3 04263-61606 Cable Assembly, \D"-\D"...

  • Page 33: Disassembly Procedures

    Disassembly Procedures This section provides the procedures to disassemble the 4263B's major assemblies. Tools and fasteners required for the replacement are described. Caution SUSCEPTIBLE TO DAMAGE FROM ESD. Perform the following procedures only at a static-safety workstation and wear a grounding strap. Tools and Fasteners The 4263B mechanical components are secured using metric threaded fasteners.

  • Page 34: A1 Main Board Removal

    A1 Main Board Removal Removal Procedure 1. Remove the A2 CPU Board Assembly referring to \A2 CPU Board Assembly Removal". 2. Disconnect the following cable assemblies and wire assemblies from the A1 assembly. a. The four cable assemblies marked \A", \B", \C", and \D" which are connected to the UNKNOWN connectors on the Front Panel b.

  • Page 35: Keyboard Assembly Removal

    5. Slide the A5 assembly toward the right to remove the switch on the A5 assembly from the line switch plate slot. 6. Remove the A5 assembly from the chassis. Keyboard Assembly Removal Removal Procedure 1. Remove the cover referring to \Cover Removal". 2.
  • Page 36 7. Disconnect the cable assembly which is connected to the BNC connector being replaced from the A1 main board assembly. 8. Remove the core holder which holds the cable assembly which is connected to the BNC connector being replaced, by unscrewing the screw secures the holder from the front side. 9.

  • Page 37: Introduction

    Troubleshooting Introduction This chapter provides assembly level troubleshooting information for the 4263B. The information includes theory of operation, and troubleshooting. Safety Considerations This chapter contains WARNINGs and CAUTIONs that must be followed for your protection and to avoid damaging the equipment. Warning Required Equipment Table 1-1 lists the equipment required for troubleshooting.

  • Page 38: After Service Product Safety Checks

    After Service Product Safety Checks Warning Perform the following ve safety checks to verify the safety condition of the 4263B (these checks may also be used for safety checks after troubleshooting and repair). 1. Visually inspect the interior of the instrument for any signs of abnormal internally generated heat, such as discolored printed circuit boards and components, damaged insulation, or evidence of arcing.

  • Page 39: Theory Of Operation

    Theory of Operation This section describes the general overall operation of the 4263B and the operation of each assembly. Overall Measurement Theory The 4263B measures the impedance of the Device Under Test (DUT) by measuring vector voltage to current ratio. A vector is a value which consists of a magnitude and a phase. The impedance of the Device Under Test (DUT) is determined by the vector ratio between the voltage across the DUT and the current owing thorough it.

  • Page 40: Overall Block Diagram

    Overall Block Diagram Figure 4-2 shows the overall block diagram of the 4263B. The signal source section applies a measurement signal to the DUT. The transducer block converts the voltage across and the current through the DUT to two voltages which are output to the vector ratio detector.

  • Page 41: Analog Section

    Analog Section Figure 4-3 shows the analog section block diagram. The 4263B analog section can be divided into three sections, the signal source, transducer and vector ratio detector. The signal source generates an ac, dc, or dc biased ac signal of which frequency and level is set from the keyboard or by GPIB commands.

  • Page 42: Signal Source Section

    Signal Source Section The signal source section generates three kinds of signals, dc, ac, and dc biased ac voltage signals. The ac signal frequency can be selected from among ve choices, 100, 120, 1 k, 10 k and 100 kHz. The ac or dc signal level has ve choices, 50 m, 100 m, 250 m, 500 m, and 1 V. The dc bias has three choices, 0, 1.5, and 2 V, and has an external bias function with which allows to apply a dc voltage from an external voltage source via the Ext DC Bias connector on the 4263B rear panel.

  • Page 43: Transducer Section

    Transducer Section The transducer section measures the vector voltage across the DUT, and the current owing through the DUT by converting the current to voltage. The transducer also includes a switch used by the Option 001 (Transformer Parameter Measurement), and the contact check voltage source.

  • Page 44: Vector Ratio Detector Section

    Vector Ratio Detector Section The vector ratio detector section processes the two output voltages from the transducer section and converts these voltages into digital data. Figure 4-6 shows the vector ratio detector block diagram. In the gure, are the outputs of the transducer section. Transformer Parameter Measurement (Option 001 only) Note This function only applies only to an 4263B with Option 001.

  • Page 45: Digital Section

    In the gure, the transformer primary is connected to H and L connectors, and the secondary is connected to the H and L connectors. L and L are connected as a common. When measuring the turns ratio, for example, the 4263B measures the primary voltage and secondary voltage while applying an ac voltage to the primary.

  • Page 46: Power Supply Section

    The EEPROM (A2U1) stores the unit unique data, such as the adjustment data and the operator unique data, such as the operator saved measurement setup condition. The EEPROM will not lose its data when power is turned o . The EEPROM is mounted in a socket for easy replacement.

  • Page 47: Troubleshooting

    Troubleshooting Figure 4-10 shows the overall troubleshooting owchart to nd the defect assembly. Follow the owchart when troubleshooting. Refer to the \Check Procedure References" for the 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 48 4-12 T roubleshooting...

  • Page 49: Check Procedure References

    Check Procedure References Refer to the corresponding check procedure. Each check procedure is numbered the same as in Figure 4-10 for quick reference. Check 1, DC-DC Converter Output Voltage 1. Remove the cover referring to \Cover Removal" in Chapter 3. 2.

  • Page 50: Check 2, Lcd Displays Anything

    Check 2, LCD Displays Anything? 1. Turn o the 4263B. 2. Turn on the 4263B 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 6, CPU Power LED Lights?".

  • Page 51: Check 7, Any Error Code On Led

    Check 7, Any Error Code on LED? 1. Turn o the 4263B. 2. Turn on the 4263B while watching LEDs A2DS1 on the A2 CPU Board Assembly. 3. Check if the LEDs light in the sequence shown in Figure 4-12. 4.

  • Page 52: Check 8, Cpu Fuse High Lead Voltage

    Check 8, CPU Fuse High Lead Voltage 1. Turn on the 4263B. 2. Using a multimeter, check if the dc voltage at the high lead of the fuse F1 on the CPU Board shown in Figure 4-13 is +5 0.2 V. 3.

  • Page 53: Check 10, Dc-Dc Converter Input Voltage

    Check 10, DC-DC Converter Input Voltage 1. Turn on the 4263B. 2. Using a multimeter, check if the voltage between the \DC OUT" test pad and TP500 (DC-DC Converter input voltage) is between 12 V and 15 Vdc. Refer to Figure 4-14 for test pad and pin locations.

  • Page 54: Check 11, Dc-Dc Converter Open Output Voltages

    Check 11, DC-DC Converter Open Output Voltages 1. Turn o the 4263B. 2. Disconnect the DC-DC Converter Output Cable shown in Figure 4-15 from connector \J504" on the A1 Main Board Assembly. 3. Turn the 4263B on. 4. Using the multimeter, check if the DC-DC Converter open output voltages on the output connector pins shown in Figure 4-15 are in the ranges shown in Table 4-2.

  • Page 55: Check 12, Transformer Secondary Voltage

    Check 12, Transformer Secondary Voltage 1. Turn o the 4263B. 2. Disconnect the transformer secondary connector from connector \J501" on the A1 Main Board Assembly. Refer to Figure 4-16 for the connector location. 3. Turn the 4263B on. 4. Using a multimeter, check if the transformer secondary voltage is between +13 V and +17 Vac.

  • Page 57: Introduction

    This appendix contains the information required to adapt this manual to earlier versions or con gurations of the 4263B than the current printing date of this manual. The information in this manual applies directly to 4263B LCR Meter whose serial number pre x is listed on the title page of this manual.

  • Page 59: Introduction

    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 the A2 Assembly is replaced. 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 sides as shown in the gure.
  • Page 61 Index Impedance Measurement 4m Adjustment, 2-10 A1 Main Board Removal, 3-10 Instruments Covered by This Manual, 1-1 A2 CPU Board Assembly Removal, 3-10 A5 AC Inlet Board Assembly Removal, 3-10 Adjustable Components, 2-2 Keyboard Assembly Removal, 3-11 Adjustment Program, 2-3 Adjustments, 2-1 Adjustments Procedure References, 2-7 LCD Assembly Removal, 3-11...

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