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Troubleshooting
Troubleshooting Assembly–Level Problems
5. If a supply voltage is not present on the connector, measure the appropriate point listed in the
following table:
6. If the voltage is present on P112 but not present on P223, replace the A31 Motherboard.
7. If the voltages are not present on P112, troubleshoot the A9 YIG Driver.
Connector P112 Supply Voltage Voltage Range
Pin 1, 2, 26, 27 –5.2 Vdc –5.2 ± 0.1 Vdc
Pin 19, 44 –6 Vdc –6 ± 0.1 Vdc
Pin 17, 18, 42 +9 Vdc +9 ± 0.1 Vdc
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