E8257D/67D, E8663D PSG Signal Generators Service Guide 95
Troubleshooting
Troubleshooting Assembly–Level Problems
Self–Tests 22xx: A8 Output 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.
2200 Ground and PTAT Test
—Replace A8 Output.
Supply Voltage
(Vdc)
Connector Pins Minimum Value
(Vdc)
Maximum Value
(Vdc)
Origin
+15 P52–6, 21 +14.55 +15.45 Main Supply
–15 P52–2, 17 –15.45 –14.55 Main Supply
+5.2 P52–14, 29 +5.04 +5.36 Main Supply
+9 P52–5, 20 +8.82 +9.18 YIG Driver
–6 P52–3, 18 –6.12 –5.88 YIG Driver
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