Troubleshooting | HP 1GSa/s Digitizing Oscilloscope 16532A instruction

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

Image 76

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

Contents

HP 16532A Safety Considerations Safety Symbols Contents Calibration ServiceSection Replaceable Parts List of Tables Page Table of Contents Page Introduction Safety RequirementsModule Covered by This Manual Accessories Supplied Accessories AvailableSpecifications Operating Characteristics HP 16532A Specifications Rise Time2 1.4 nsWaveform Record Length 8000 points Vertical dc Gain Accuracy4 ± 1.5% of full scale Vertical at BNC HP 16532A Operating CharacteristicsTimebase Triggering DigitizerTrigger Level Range Trigger Modes Waveform Display Display Modes Measurement Aids Setup Aids Operating Environment Equipment Critical Specifications Recommended Model USE Page Table of Contents Page Power Requirements Initial Inspection Safety RequirementsModule Installation Preparation for Use Installation Considerations Procedure Endplate Overlap Bottom Sequence Tagging for Service Operating EnvironmentStorage Packaging Table 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 Accuracy DC Input Offset Div Offset Supply Min Max Bandwidth 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 Calibration Setting the PROTECT/UNPROTECT Switch to Unprotect Location of the PROTECT/UNPROTECT Switch Loading the Default Calibration Factors Equipment Required for Calibration Self 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 follows Calibrate the Ext Trig Null of the Self Cal menu as follows Ext Trig Null Calibration Connections Setting the PROTECT/UNPROTECT Switch to Protect Sealing the Mainframe Table of Contents Page Replaceable Parts List AbbreviationsOrdering Information Exchange Assemblies Direct 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 Operation HP 16532A Oscilloscope Block Diagram Page Self-Test Access Procedure Self-Tests Load Test System Screen Functional Tests Screen Touch the Functional Tests field A/D Test Run Screen Exit Test System Screen Self-Test Descriptions Data Memory TestTimebase Test Test Troubleshooting Troubleshooting Aids Verifying 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 Procedure Oscilloscope Module Replacement Procedure 12. Endplate Overlap Bottom Sequence Trigger Cable Removal and Replacement Trigger Cable Removal Procedure Trigger Cable Replacement Procedure Attenuator Removal and ReplacementAttenuator Removal Procedure Attenuator Replacement Procedure Certification WarrantyAssistance