HP 8924E, Assembly

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Chapter 10, Service Screen
Troubleshooting with the Service Screen
N:\mkt\MANUALS\HP8924C\ALR\service.fb
Troubleshooting with the Service Screen
The Service screen uses the internal voltmeter and frequency counter functions to
monitor specific nodes in most assemblies. A large number of latch and DAC
settings used throughout the Test Set can also be read and/or set to alter standard
operation. These functions are primarily intended to allow the automated internal
diagnostic routines to verify proper instrument operation, and to allow the
periodic adjustment routines (PER_CAL3, CDMA_CAL, and PCB_CAL) to
modify Test Set operation.
Access to these functions under manual control is provided to allow further
troubleshooting when the diagnostics cannot isolate a failure to a specific
assembly. To do this, you must understand how to operate the Test Set and,
especially, understand how the assemblies in the Test Set work together.
Detailed manual Test Set operation is provided in the User’s Guide. Refer to the
Block Diagram chapter in this manual for information on how the overall
instrument, and each module, works.
How to Access the Service Screen
1. Press PRESET to preset the Test Set.
2. Press the SHIFT key, then press the TESTS key to access the CONFIGURE screen.
3. Select the SERVICE field in bottom-right corner of the screen (“To Screen” menu).