HP 1GSa/s Digitizing Oscilloscope 16532A manual Troubleshooting Aids

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HP 16532A - Service

6-8. Troubleshooting

The troubleshooting flow chart given in figure 6-10 will isolate module failures to card level only. It is not intended for component level troubleshooting. If self-tests indicate a failure, begin at the Start of the trou- bleshooting flow chart. When a specific test fails, you will be instructed to replace a faulty card or you will be referred to other flow charts for the isolation of the faulty card or cable.

The effects of ELECTROSTATIC DISCHARGE can damage electronic compo- nents. Grounded wriststraps and mats should be used when you perform any kind of service to this instrument or the cards in it.

Troubleshooting Aids

The Calibration menu contains the Service Cal mode that can help you troubleshoot the oscilloscope module. When the problem is found and corrected, run all of the calibration procedures given in Section IV, "Calibration."

If you suspect a fault in the system, you can load the system default values to see if the NVRAM parame- ters have possibly been corrupted. The procedure for loading the default values is given in Section IV un- der the heading "Loading the Default Calibration Factors."

If loading the default values does not fix the problem, you may want to verify that the system clock is working correctly. The procedure to verify the system clock is given below.

If none of these aids find the problem, go to the troubleshooting flow chart to find the problem. As stated above, when the problem is found and corrected, run all of the calibration procedures given in Section IV "Calibration."

6-10

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Contents HP 16532A Safety Considerations Safety SymbolsContents Calibration ServiceSection Replaceable Parts List of Tables Page Table of Contents Page Introduction Safety RequirementsModule Covered by This Manual Accessories Supplied Accessories AvailableSpecifications Operating CharacteristicsHP 16532A Specifications Rise Time2 1.4 nsWaveform Record Length 8000 points Vertical dc Gain Accuracy4 ± 1.5% of full scaleVertical at BNC HP 16532A Operating CharacteristicsTimebase Triggering DigitizerTrigger Level Range Trigger ModesWaveform Display Display ModesMeasurement Aids Setup Aids Operating EnvironmentEquipment Critical Specifications Recommended Model USE Page Table of Contents Page Power Requirements Initial Inspection Safety RequirementsModule Installation Preparation for UseInstallation Considerations ProcedureEndplate Overlap Bottom Sequence Tagging for Service Operating EnvironmentStorage PackagingTable of Contents Page Test Record Performance Test ProceduresPerformance Test Interval DC CAL Output Test AC CAL Output Test Equipment Required Critical Specification Model/Part Number SpecificationInput Resistance Page Voltage Measurement Accuracy Voltage Measurement Accuracy Test Div Offset Supply Upper Limit Lower Limit Procedure Zero-Input Offset Offset AccuracyDC Input Offset Div Offset Supply Min MaxBandwidth V1MHz Time Measurement Accuracy Menu Selection Setting Trigger Sensitivity RUN Repetitive Performance Test Record Paragraph No Test Results Yes No Page Table of Contents Page Calibration Interval Calibration Protection SwitchMaintaining System Integrity Instrument Warmup CalibrationSetting the PROTECT/UNPROTECT Switch to Unprotect Location of the PROTECT/UNPROTECT SwitchLoading the Default Calibration Factors Equipment Required for CalibrationSelf Cal Menu Calibrations Calibrate Delay of the Self Cal menu as followsCalibrate Vert Cal of the Self Cal menu as follows Calibrate the Time Null of the Self Cal menu as follows Calibrate the Logic Trigger of the Self Cal menu as followsCalibrate the Ext Trig Null of the Self Cal menu as follows Ext Trig Null Calibration ConnectionsSetting the PROTECT/UNPROTECT Switch to Protect Sealing the MainframeTable of Contents Page Replaceable Parts List AbbreviationsOrdering Information Exchange AssembliesDirect Mail Order System Reference Designator and Abbreviations Parts Identification Reference Designator HP Part Qty NumberDescription Mfr Code Mfr Part NumberPage Table of Contents Page Introduction Safety Requirements Module Block Diagram and The- ory of OperationMain Assembly Theory of Operation Attenuator Theory of OperationHP 16532A Oscilloscope Block Diagram Page Self-Test Access Procedure Self-TestsLoad Test System Screen Functional Tests Screen Touch the Functional Tests fieldA/D Test Run Screen Exit Test System Screen Self-Test Descriptions Data Memory TestTimebase Test TestTroubleshooting Troubleshooting AidsVerifying the System Clock Page Troubleshooting Sheet Troubleshooting E E T1 6 5 3 2 a Troubleshooting E E T Troubleshooting E E T Troubleshooting E E T Troubleshooting E E T Oscilloscope Module Removal and Replacement Oscilloscope Module Removal ProcedureOscilloscope Module Replacement Procedure 12. Endplate Overlap Bottom SequenceTrigger Cable Removal and Replacement Trigger Cable Removal ProcedureTrigger Cable Replacement Procedure Attenuator Removal and ReplacementAttenuator Removal Procedure Attenuator Replacement Procedure Certification WarrantyAssistance