Self-Tests 24Xx: A38 Lowband Filter Self-Test Errors - Keysight Technologies E8257D Service Manual

Troubleshooting
Troubleshooting Assembly–Level Problems
Self–Tests 24xx: A38 Lowband Filter Self–Test Errors
Before proceeding to the reported self–test error code, check the following
voltages. If any voltages are out of specification troubleshoot the supply
problem first.
Supply Vol tage
(Vdc)
+32
+15
–15
+5.2
–5.2
+5.2 Digital High
+3.4 Digital Low
+2.6
+1.8
E8257D/67D, E8663D PSG Signal Generators Service Guide
Connector Pins Minimum Value
(Vdc)
P142–4 +31.04
P142–28 +14.55
P142–3 –15.45
P142–2, 27 +5.04
P142–1, 26 –5.30
P141–64, 65, 129, +5.04
130
P141–60, 61, 62, 63, +3.3
125, 126, 127, 128
P141–57, 58, 59, +2.52
123, 124
P141–55, 56, 120, –1.75
121
Maximum Value Origin
(Vdc)
+32.96 Main Supply
+15.45 Main Supply
–14.55 Main Supply
+5.36 Main Supply
–5.10 YIG Driver
+5.36 Main Supply
+3.5 Main Supply
+2.68 Main Supply
–1.85 Motherboard
97