Agilent 4263B LCR 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.
Notice The information contained in this document is subject to change without notice. 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.
Manual Printing History August 1996 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : First Edition (part number: 04263-90033) June 2000 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Second Edition (part number: 04263-90033) iii
Safety Summary The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions or with speci c 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.
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.
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. For any assistance, contact your nearest Agilent Technologies Sales and Service O ce.
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. On (Supply). O (Supply). Frame or chassis terminal This Warning sign denotes a hazard.
Documentation Map Operation Manual Operation Manual (Agilent Part Number: 04263-90010 for English edition, 04263-97010 for Japanese edition) explains speci cations, basic measurement explanations, and how to verify conformance to published speci cations. Service Manual 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.
Contents 1. General Information Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instruments Covered by This Manual . . . . . . . . . . . . . . . . . . . . . Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. Adjustments Introduction . . . . . . . . . . . . . . . Safety Consideration . . . . . . . . . . Required Equipment . . . . . . . . . . . Adjustment Tools . . . . . . . . . . . . Adjustable Components . . . . . . . . .
A5 AC Inlet Board Assembly Removal Removal Procedure . . . . . . . Keyboard Assembly Removal . . . . Removal Procedure . . . . . . . LCD Assembly Removal . . . . . . Removal Procedure . . . . . . . BNC Connector Removal . . . . . . Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures 1-1. 2-1. 2-2. 2-3. 2-4. 3-1. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 4-10. 4-11. 4-12. 4-13. 4-14. 4-15. 4-16. B-1. Serial Number Label . . . . . . . . . . . . . Adjustment Program Flow . . . . . . . . . . Signal Source Level Adjustment Setup . . . . Impedance Measurement 0m Adjustment Setup Impedance Measurement 1m Adjustment Setup Cover Removal . . . . . . . . . . . . . . . Voltage Current Ratio Measurement Principle . 4263B Overall Block Diagram . . . . . . . . .
1 General Information Introduction This chapter provides information on instruments covered by this manual and required equipment for the adjustments and troubleshooting. Instruments Covered by This Manual Agilent Technologies uses a two-section, nine character serial number which is printed on the serial number label (Figure 1-1) attached to the instrument's rear panel. The rst ve characters are the serial pre x, and the last ve digits are the su x. Figure 1-1.
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. Table 1-1. Required Equipment Equipment Requirements Recommended Model Multimeter AC V Accuracy: < 2.
2 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. If proper performance cannot be achieved after adjustments, proceed to Chapter 4.
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. Factory-Selected Components No factory-selected components are used in the 4263B EEPROM Write Protect Switch There are no EEPROM write protect switches in the 4263B.
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. The program should be installed into your computer according to the procedure described in \Program Installation".
Impedance Measurement 1m Adjustment Impedance Measurement 2m Adjustment Impedance Measurement 4m Adjustment Rewrite EEPROM obtains the data to adjust the actual measurement impedance to the standards' value, when the 1m test leads are used. This adjustment should be performed if the performance test, Impedance Measurement Accuracy Test, fails. Perform the Impedance Measurement 0m Adjustment prior to this adjustment.
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. Use the working disk or the harddisk and store the original disk in a safe place.
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.
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.
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 Open Termination Short Termination 42030A 42090A 42091A Setup This setup obtains the impedance measurement adjustment data for 0 m test leads (no test leads). Figure 2-3.
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 Open Termination Short Termination Test Leads (1 m) 42030A 42090A 42091A 16048A Setup This setup obtains the impedance measurement adjustment data for 1 m test leads. Figure 2-4.
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. Note Perform the Impedance Measurement 0m Adjustment prior to performing this adjustment.
3 Assembly Replacement Introduction This chapter provides the 4263B replaceable parts lists, and the step by step disassembly procedures for the major assemblies. Table 3-1 to Table 3-7 describe all the 4263B replaceable parts. 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 o ce.
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. The ROM transfer reduces parts cost for the repair, and the EEPROM transfer saves time from readjusting the 4263B.
Table 3-1.
Table 3-2. A2 CPU Board Assembly, Replaceable Assembly List Reference Designation Agilent Part Number Qty. Description 1 2110-1123 1 A2F1, Fuse SMT 2 A 2 1818-5146 1 A2U1, EEPROM 3 04263-85041 1 A2U11, ROM Rev. 1.01 Table 3-3. Replaceable Assembly List Reference Designation 3-4 Agilent Part Number Qty.
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 Designation Number Qty.
Table 3-5. Replaceable Mechanical Parts List 2 Reference Designation Agilent Part Number Qty. 1 04263-61615 1 GPIB Connector with atcable1 2 1250-0083 1 BNC Connector, Ext DC Bias 0360-1190 1 Lug Terminal (Hidden) 2190-0016 1 Washer (Hidden) 2950-0001 1 Nut 2110-0565 1 Fuse Holder 2110-0202 1 Fuse 0.25 A, Slow Blow (230V) 3 2110-0201 Fuse 0.
Table 3-6. Replaceable Mechanical Parts List 3 Reference Designation 1 2 3 4 5 6 7 8 9 10 11 Agilent Part Number 0515-2079 04263-24001 2190-0586 04263-00607 04263-24002 2190-0584 0515-1550 04339-24006 5040-3347 0460-0616 04263-07001 0515-1550 0370-2862 04339-23001 0535-0031 04339-25002 0515-0914 04263-01201 0515-0914 Qty. 1 2 2 1 2 2 7 4 2 150 mm 2 2 2 4 1 1 1 2 2 1 5 Description Screw M4 (on the Chassis) Nut Rod (for Transformer) Washer Spring M4 Plate Shield Nut Rod (for DC-DC Conv.
Table 3-7. Replaceable Mechanical Parts List 4 Reference Designation Qty.
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. Many fasteners in the 4263B may appear to be Phillips type, but they are in fact, Pozidrive type.
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. The wire assembly which is connected to the transformer c. The two wire assemblies which are connected to the DC-DC Converter d.
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. Disconnect the two atcable assemblies and the wire assembly from the front side of the A2 assembly. 3. Remove the two at head screws that secure the front panel from the bottom. 4. Remove the side trim label from both sides of the front bezel. 5.
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. Disconnect the cable from the BNC connector housing being replaced, by unscrewing the nut which fastens, from the back of the front panel, the cable to the BNC connector. 10.
4 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 The servicing procedures described herein are performed when power is supplied to the instrument and its protective covers are removed.
After Service Product Safety Checks Warning Whenever it appears likely that protective safety provisions have been impaired, the apparatus shall be marked as inoperative and should be secured against any unintended operation. The protection provisions will have likely been compromised if, for example: The instrument shows visible signs of damage. The instrument fails to perform the intended measurement. The unit has undergone prolonged storage under unfavorable conditions.
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.
Overall Block Diagram Figure 4-2 shows the overall block diagram of the 4263B. Figure 4-2. 4263B Overall Block Diagram 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. The voltage across the DUT is input to di erential ampli er, v. The current through the DUT is converted to a voltage before being input to di erential ampli er, i.
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. The signal is applied to the DUT via the High-Current (HCUR ) connector.
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.
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. Figure 4-5 shows the transducer block diagram. Figure 4-5. Transducer Block Diagram The voltage across the DUT is measured at the HPOT and LPOT connectors using a di erential ampli er.
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, iOUT and vOUT are the outputs of the transducer section. Figure 4-6. Vector Ratio Detector Block Diagram Transformer Parameter Measurement (Option 001 only) Note This function only applies only to an 4263B with Option 001.
In the gure, the transformer primary is connected to HCUR and LCUR connectors, and the secondary is connected to the HPOT and LPOT connectors. LCUR and LPOT 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. The 4263B calculates the turns ratio from the ratio of these two voltages.
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. Jumpers and switches set the 4263B's conditions. Refer to Appendix B for more information. Power Supply Section Figure 4-9 shows the power supply section block diagram. Figure 4-9.
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. The troubleshooting procedure, therefore, only isolates the defective assembly.
Figure 4-10.
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. Turn on the 4263B. 3. Using a multimeter, check to see if the voltages between the test pads and the ground (TP500) on A1 Main Board Assembly shown in Figure 4-11 are in the ranges shown in Table 4-1. 4.
Check 2, LCD Displays Anything? 1. 2. 3. 4. Turn o the 4263B. Turn on the 4263B while watching the LCD. Check for a beep sound for a moment and if you see anything is displayed on the LCD. If beep sounds and LCD displays something, proceed to \Check 3, LCD Operates Correctly?", otherwise proceed to \Check 6, CPU Power LED Lights?". Check 3, LCD Operates Correctly? 1. 2. 3. 4. Turn on the 4263B. Reset the 4263B. Check if the LCD's back light is lit.
Check 7, Any Error Code on LED? 1. 2. 3. 4. Turn o the 4263B. Turn on the 4263B while watching LEDs A2DS1 on the A2 CPU Board Assembly. Check if the LEDs light in the sequence shown in Figure 4-12. If LEDs light as the sequence, replace the LCD Assembly, otherwise (possibly, \HALT" doesn't turn o or \BERR" lights) replace the A2 CPU Board Assembly. Note When replacing the A2 CPU Board Assembly, refer to \Replacing the A2 CPU Board Assembly" in Chapter 3 for handling the ROM and EEPROM on the A2 Assembly.
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 +560.2 V. 3. If the voltage is in the range, replace the A2 CPU Board Assembly, otherwise replace the A1 Main Board Assembly. Note If the multimeter reading is correct, fuse F1 on the A2 CPU Board Assembly is most suspicious. Replacing only the fuse may x the problem.
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. 3. If the voltage is in range, proceed to the \Check 11, DC-DC Converter Open Output Voltages", otherwise proceed to the \Check 12, Transformer Secondary Voltage". Figure 4-14.
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. 5. If passed, replace the A1 Main Board Assembly, otherwise replace the DC-DC Converter Assembly. Figure 4-15.
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. 5. If passed, replace the A1 Main Board, otherwise replace the transformer. Figure 4-16.
A Manual Changes 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. Manual Changes To adapt this manual to your 4263B, refer to Table A-1, and make all of the manual changes listed opposite your instrument's serial number.
B 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. Figure B-1.
Index A A1 Main Board Removal, 3-10 A2 CPU Board Assembly Removal, 3-10 A5 AC Inlet Board Assembly Removal, 3-10 Adjustable Components, 2-2 Adjustment Program, 2-3 Adjustments, 2-1 Adjustments Procedure References, 2-7 Adjustment Tools, 2-2 After Service Product Safety Checks, 4-2 Analog Section, 4-5 Assembly Replacement, 3-1 B BNC Connector Removal, 3-11 C Check Procedure References, 4-13 Cover Removal, 3-9 D Digital Section, 4-9 Disassembly Procedures, 3-9 Documentation Map, viii E EEPROM Write P
