Self-Tests 3Xx: A7 Reference (Standard) Self-Test Errors (For Instruments With Serial Prefixes < Us4805/My4805) - Keysight Technologies E8257D Service Manual

Troubleshooting
Troubleshooting Assembly–Level Problems
Self–Tests 3xx: A7 Reference (Standard) Self–Test Errors (For
instruments with serial prefixes < US4805/MY4805)
Before proceeding to the reported self–test error code, check the following
voltages. If any of the voltages are out of specification, troubleshoot the supply
problem first.
Supply Vol tage
(Vdc)
+32
+15
–15
+5.2
+9
300 1 GHz Detector
1. Check and remove any connection to the 10 MHz external reference on the
2. If the signal generator continues to fail self–test, replace the A7
60
Connector Pins
P102–7
P102–6, 21
P102–2, 17
P102–14, 29
P102–5, 20
rear panel.
Reference.
E8257D/67D, E8663D PSG Signal Generators Service Guide
Minimum Value Maximum Value
(Vdc) (Vdc)
+31.04 +32.96
+14.55 +15.45
–14.55 –15.45
+5.04 +5.37
+8.82 +9.18
Origin
Main Supply
Main Supply
Main Supply
Main Supply
YIG Driver