Agilent Technologies 8590L Service Manual page 239

Troubleshooting the Analyzer
Using the Internal Service-Diagnostic Routines
Verify the 2 V reference detector
This service-diagnostic routine verifies the 2 V reference circuitry on
the A16 processor/video board.
Figure 4-7 2 V Reference Detector
240
Verify the 2 V reference by pressing
• If the signal trace is at the top of the display, the 2 V reference is
functioning properly. See
• If the signal is not at the top of the display, the problem is isolated
to the A16 processor/video board assembly. Refer to
"Troubleshooting the A16 Processor/Video Board Assembly"
located in this chapter for further troubleshooting.
2V REF DETECTOR
Figure 4-7.
.
Chapter 4