WIXLIB

A5 AC Inlet Board Assembly RemovalRemoval Procedure . . . . . . .Keyboard Assembly Removal . . . .Removal Procedure . . . . . . .LCD Assembly Removal . . . . . .Removal Procedure . . . . . . .BNC Connector Removal . . . . . .Removal Procedure . . . . . . .3-103-103-113-113-113-113-113-11Introduction . . . . . . . . . . . . . . . . . . . . . . .Safety Considerations . . . . . . . . . . . . . . . . .Required Equipment . . . . . . . . . . . . . . . . . . .After Service Product Safety Checks . . . . . . . . . . .Theory of Operation . . . . . . . . . . . . . . . . . . .Overall Measurement Theory . . . . . . . . . . . . . .Overall Block Diagram . . . . . . . . . . . . . . . . .Analog Section . . . . . . . . . . . . . . . . . . . .Signal Source Section . . . . . . . . . . . . . . . .Transducer Section . . . . . . . . . . . . . . . . .Vector Ratio Detector Section . . . . . . . . . . . . .Transformer Parameter Measurement (Option 001 only)Digital Section . . . . . . . . . . . . . . . . . . . . .Power Supply Section . . . . . . . . . . . . . . . . .Troubleshooting . . . . . . . . . . . . . . . . . . . . .Check Procedure References . . . . . . . . . . . . . .Check 1, DC-DC Converter Output Voltage . . . . . .Check 2, LCD Displays Anything? . . . . . . . . . . .Check 3, LCD Operates Correctly? . . . . . . . . . .Check 4, Any Error Message on LCD? . . . . . . . . .Check 5, CPU Related Error Message? . . . . . . . . .Check 6, CPU Power LED Lights? . . . . . . . . . . .Check 7, Any Error Code on LED? . . . . . . . . . .Check 8, CPU Fuse High Lead Voltage . . . . . . . . .Check 9, Fuse and Line Switch . . . . . . . . . . . .Check 10, DC-DC Converter Input Voltage . . . . . . .Check 11, DC-DC Converter Open Output Voltages . . .Check 12, Transformer Secondary Voltage . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Manual Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1A-14. TroubleshootingA. Manual ChangesB. Default Jumper and Switch SettingsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Jumper and Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . .IndexContents-2B-1B-1

6.B-1.Serial Number Label . . . . . . . . . . . . .Adjustment Program Flow . . . . . . . . . .Signal Source Level Adjustment Setup . . . .Impedance Measurement 0m Adjustment SetupImpedance Measurement 1m Adjustment SetupCover Removal . . . . . . . . . . . . . . .Voltage Current Ratio Measurement Principle .4263B Overall Block Diagram . . . . . . . . .Analog Section Block Diagram . . . . . . . .Signal Source Section Block Diagram . . . . .Transducer Block Diagram . . . . . . . . . .Vector Ratio Detector Block Diagram . . . . .Basic Transformer Measurement Setup . . . .Digital Section Block Diagram . . . . . . . .Power Supply Section Block Diagram . . . . .Troubleshooting Flow Chart . . . . . . . . .DC-DC Converter Output Voltage Check . . . .CPU Board Assembly LED Light Sequence . . .Location of High Lead of A2F1 Fuse . . . . .DC-DC Converter Input Voltage Check . . . .DC-DC Converter Output Connector . . . . .Transformer Secondary Voltage Check . . . .Jumper and Switch Settings . . . . . . . . 24-134-154-164-174-184-19B-1Required Equipment . . . . . . . . . . . . . . .Required Language Extensions . . . . . . . . . .Related Adjustments . . . . . . . . . . . . . . .Replaceable Major Assembly List . . . . . . . . .A2 CPU Board Assembly, Replaceable Assembly ListReplaceable Assembly List . . . . . . . . . . . .Replaceable Mechanical Parts List 1 . . . . . . . .Replaceable Mechanical Parts List 2 . . . . . . . .Replaceable Mechanical Parts List 3 . . . . . . . .Replaceable Mechanical Parts List 4 . . . . . . . .DC-DC Converter Output Voltage (Connected) . . .DC-DC Converter Open Output Voltages . . . . . .Manual Changes by Serial Number . . . . . . . Contents-3

1General InformationIntroductionThis chapter provides information on instruments covered by this manual and requiredequipment for the adjustments and troubleshooting.Instruments Covered by This ManualAgilent Technologies uses a two-section, nine character serial number which is printed onthe serial number label (Figure 1-1) attached to the instrument's rear panel. The rst vecharacters are the serial pre x, and the last ve digits are the su x.Figure 1-1. Serial Number LabelAn instrument manufactured after the printing date of this manual may have a serialnumber pre x that is not listed on the title page. This unlisted serial number pre x indicatesthe instrument is di erent from those described in this manual. The manual for this newinstrument may be accompanied by a yellow Manual Changes supplement or have a di erentmanual part number. This sheet contains \change information" that explains how to adapt themanual to the newer instrument.In addition to change information, the supplement may contain information for correctingerrors (Errata) in the manual. To keep this manual as current and accurate as possible, AgilentTechnologies recommends that you periodically request the latest Manual Changes supplement.The supplement for this manual is identi ed by this manual's printing date and its part number,both of which appear on the manual's title page. Complimentary copies of the supplement areavailable from Agilent Technologies. If the serial pre x or number of an instrument is lowerthan that on the title page of this manual, see Appendix A, Manual Changes . For informationconcerning, a serial number pre x that is not listed on the title page or in the Manual Changesupplement, contact the nearest Agilent Technologies o ce.General Information1-1

Required EquipmentTable 1-1 lists the required equipment for adjusting and troubleshooting the 4263B. Table 1-2lists the required language extensions to be used with the adjustment program.Table 1-1. Required EquipmentEquipmentRequirementsRecommended ModelMultimeterAC V Accuracy: 2.5%(at 100 kHz)3458A or 3478A1A1, T2Standard ResistorsNo Substitute42030A1AOpen TerminationNo Substitute42090A31AShort TerminationNo Substitute42091A31AComputerNo SubstituteHP 9000 series 200 or 3004RAM 4M bytes1AOperating SystemBASIC 5.1 or higherHP 98616A1AAdjustment Program No substituteAgilent PN 04263-650051ACableAgilent PN 8120-18391A1ABNC(m)-BNC(m) CableDual Banana-BNC(m) Cable Agilent PN 11001-60001Adapter1Adjustment2TroubleshootingTest Leads (1 m)16048A1ATest Leads (2 m)16048D1ATest Leads (4 m)16048E1ABNC(f)-BNC(f) AdapterAgilent PN 1250-00804A3This model is also included in the 42100A, Four Terminal Pair Resistor Set4Excluding the HP 9826ANameCLOCKCOMPLEXCRTACRTX11-2Qty. UseTable 1-2. Required Language ExtensionsNameName Ver.Name RAPHGRAPHXGPIBIO5.25.25.05.1This language extension depends on the mass storage type used.General InformationKBDMATMSPDEVVer.5.15.15.15.0

2AdjustmentsIntroductionThis chapter describes the adjustments required to ensure the 4263B is within its publishedspeci cations after it has been repaired, or when it fails the performance tests. Theadjustments should be performed along with periodic maintenance to keep the 4263B inoptimum operating condition. If proper performance cannot be achieved after adjustments,proceed to Chapter 4.NoteTo ensure proper results and correct instrument operation, a 30 minutewarm-up and stabilization is required before performing the adjustments.Safety ConsiderationThis chapter contains NOTEs, CAUTIONs, and WARNINGs which must be followed to ensureoperator safety and to maintain the instrument in a safe and serviceable condition. Theadjustments covered in this chapter should be performed only by a quali ed person who isaware of the hazards.WarningAny interruption of the protective ground conductor (inside or outsidethe instrument) or disconnection of the protective ground terminal canmake the instrument dangerous. Intentional interruption of the protectiveground system for any reason is prohibited.Required EquipmentTable 1-1 lists the equipment required to perform the adjustments. Use only calibrated testequipment when adjusting the 4263B.Adjustments2-1

Adjustment ToolsNo hand tools are required for the adjustments.Adjustable ComponentsThere are no adjustable components, such as variable capacitors or variable resistors, in the4263B. All adjustments are performed by updating the adjustment data stored in the internalEEPROM.Factory-Selected ComponentsNo factory-selected components are used in the 4263BEEPROM Write Protect SwitchThere are no EEPROM write protect switches in the 4263B.Related AdjustmentsThere are two adjustments for the 4263B. Table 2-1 lists the adjustments that must beperformed if an assembly has been replaced.Table 2-1. Related AdjustmentsAssembly ReplacedA1 Main Board AssyRequired AdjustmentAll adjustmentsA2 CPU Board Assy without ROM None1A5 AC Inlet Board AssyNoneLCD AssemblyNoneDC-DC Converter UnitNoneKeyboard AssemblyNone1 If2-2Adjustmentsthe EEPROM, A2U1, is replaced, all adjustments are required.

Adjustment ProgramThe 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 adjustmentdata, 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 beinstalled into your computer according to the procedure described in \Program Installation". Tostart the program after it has been installed, refer to the \Program Execution".Figure 2-1 shows the adjustment program ow. The following lists the brief explanation foreach menu item. At the end of each adjustment, the program writes the obtained adjustmentdata both to the 4263B internal EEPROM and to the unit-serial-number dependent le on thedisk.Figure 2-1. Adjustment Program FlowINITIAL SETUPSignal Source LevelAdjustmentImpedanceMeasurement 0mAdjustmentde nes the standards' calibration values. Update the standard'scalibration values if necessary.obtains the data to adjust the actual signal source output voltage to theset value. This adjustment should be performed if any performance testfails.obtains the data to adjust the actual measurement impedance to thestandards' value, when no test leads are used. This adjustment should beperformed if the performance test, Impedance Measurement AccuracyTest, fails. Perform the Signal Source Level Adjustment prior to thisadjustment.Adjustments2-3

ImpedanceMeasurement 1mAdjustmentImpedanceMeasurement 2mAdjustmentImpedanceMeasurement 4mAdjustmentRewrite EEPROMobtains the data to adjust the actual measurement impedance to thestandards' value, when the 1m test leads are used. This adjustmentshould be performed if the performance test, Impedance MeasurementAccuracy Test, fails. Perform the Impedance Measurement 0mAdjustment prior to this adjustment.obtains the data to adjust the actual measurement impedance to thestandards' value, when the 2m test leads are used. This adjustmentshould be performed if the performance test, Impedance MeasurementAccuracy Test, fails. Perform the Impedance Measurement 0mAdjustment prior to this adjustment.obtains the data to adjust the actual measurement impedance to thestandards' value, when the 4m test leads are used. This adjustmentshould be performed if the performance test, Impedance MeasurementAccuracy Test, fails. Perform the Impedance Measurement 0mAdjustment prior to this adjustment.writes the adjustment data, which is stored in the unit-serial-numberdependent le, to the EEPROM. Only the adjustment data of previouslyadjusted item(s) will be written.NoteMake sure that the correct line frequency (50 or 60Hz) has been selected in the\UUT: 4263B" window preceding the Main Menu. This selection will improvethe adjustment data accuracy.NoteBecause the Impedance Measurement 0m Adjustment serves the referencedata for the other Impedance Measurement Adjustments, it must have beenperformed prior to the 1m, 2m, and 4m adjustments.NoteAlthough performing some of the Impedance Measurement Adjustments maysatisfy the user's requirement (e.g. for users using the 4m test leads only forthe application), it is strongly recommended to perform all the ImpedanceMeasurement Adjustments. If only one of the 1m, 2m, and 4m adjustmentsis performed after the 0m adjustment, the data for the remaining ImpedanceMeasurement Adjustments are invalid. For example, if only the 4m adjustmentis performed after the 0m adjustment, the measurement accuracy for the 1mand 2m may be out of the speci cation.2-4Adjustments

Program InstallationThe 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 theCon guration".Making a Working CopyCopy the contents of the adjustment program disk to a working disk or to the harddisk toprevent the program les from accidental deletion or destruction. Use the working disk or theharddisk and store the original disk in a safe place.De ning the Con gurationDe ne the con guration of the adjustment equipment. The con guration includes the type andthe GPIB address of the multimeter to be used. Because the program depends on equipmentcon guration, it must be rede ned if the equipment con guration has changed.Refer to the following procedure to de ne the con guration.1. Turn on the computer and bring up the BASIC system.2. Set the Mass Storage Unit Speci er to the drive/directory where the adjustment programexists using the MSI command.3. Load the \TE A4263B" le from the adjustment program disk by pressingLOAD "TE A4263B" 4Return5 (or 4Enter5).4. Run the loaded program by pressing RUN.5. As the program instructs, select the type of the multimeter to be used and enter its GPIBaddress.NoteOnce the multimeter type and GPIB addresses are set, they cannot be changedunless the con guration is rede ned.Program ExecutionPerform the following steps to start the adjustment program.NoteInstall the program prior to execution. Refer to \Program Installation".1. Turn on the computer and bring up the BASIC system. Refer to the Table 1-2 for therequired language extensions.2. Set the Mass Storage Unit Speci er to the drive/directory where the adjustment programexists using the MSI command.3. Load the program, \ADJ4263B" by pressing LOAD "ADJ4263B" 4Return5 (or 4Enter5).4. Execute the program by pressing RUN.Adjustments2-5

NoteIn the program, the 4263B is referred as \UUT".NoteIf the adjustment being performed follows right after EEPROM replacement,change switch A2SW1-1 to \CLOSE", so that the 4263B will ignore the self testerrors at power-on. (Return the switch to \OPEN" when the adjustment hasbeen completed.) Refer to Figure B-1 for the switch location.2-6Adjustments

Adjustments Procedure ReferencesThis section provides supplemental information for the adjustments which are performed bythe program. Connection instructions and some additional explanations are provided. Use thischapter as a reference when performing the adjustments.A adjustment of the 4263B consists of the following ve adjustments.Signal Source Level AdjustmentImpedance Measurement 0m AdjustmentImpedance Measurement 1m AdjustmentImpedance Measurement 2m AdjustmentImpedance Measurement 4m AdjustmentSignal Source Level AdjustmentThis adjustment updates the signal source level adjustment data stored in the EEPROM. Thedata adjust the actual signal source level to the set value.EquipmentMultimeterDual Banana-BNC(m) Cable3458APN 11001-60001SetupThis setup obtains the signal source level adjustment data.Figure 2-2. Signal Source Level Adjustment SetupPerform the following steps as the program instructs.1. Connect the Dual Banana-BNC(m) cable to the 3458A's INPUT binding posts.2. Connect another end of the Dual Banana-BNC(m) cable to the 4263B's HCUR Connector.Adjustments2-7

Impedance Measurement 0m AdjustmentThis adjustment updates the data to adjust the measurement impedance to the standard values,when no test leads are used.NotePerform the Signal Source Level Adjustment prior to performing thisadjustment.EquipmentStandard ResistorsOpen TerminationShort Termination42030A42090A42091ASetupThis setup obtains the impedance measurement adjustment data for 0 m test leads (no testleads).Figure 2-3. Impedance Measurement 0m Adjustment SetupPerform the following steps as the program instructs.1. Connect the speci ed termination or standard resistor directly to the 4263B UNKNOWNConnectors.2. Repeat step 1 as instructed.2-8Adjustments

Impedance Measurement 1m AdjustmentThis adjustment updates the data to adjust the measurement impedance to the standard values,when the 1m test leads are used.NotePerform the Impedance Measurement 0m Adjustment prior to performing thisadjustment.EquipmentStandard ResistorsOpen TerminationShort TerminationTest Leads (1 m)42030A42090A42091A16048ASetupThis setup obtains the impedance measurement adjustment data for 1 m test leads.Figure 2-4. Impedance Measurement 1m Adjustment SetupPerform the following steps as the program instructs.1. Connect the 16048A directly to the 4263B UNKNOWN Connectors.Adjustments2-9

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 UNKNOWNConnectors.4. Repeat step 3 as instructed.Impedance Measurement 2m AdjustmentThis adjustment updates the data to adjust the measurement impedance to the standard values,when the 2m test leads are used.NotePerform the Imp

Service Manual (Agilent P art Number: 04263-90033) explains how to adjust, troubleshoot, and repair the 4263B . How T o 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