Installation guide

Troubleshooting
Troubleshooting Assembly Level Problems
1-41
503 RF Detector
• If the -6 V supply is good on the connector pins indicated:
a. Turn power off, remove the A17 Synthesizer (Option 501, 502, 503, 504) and ohm the connection
between the appropriate J52 and J10 pins.
— If the connection is good, replace the A17 Synthesizer (Option 501, 502, 503, 504).
(Refer to “A17 Synthesizer (Option 501, 502, 503, 504)” on page 2-40.)
— If the connection is bad, replace the A19 Daughterboard.
(Refer to “A19 Daughterboard” on page 2-44.)
• If the -6 V supply is bad on the connector pins indicated:
a. Check the origin of the supply.
— If the supply voltage is good at the origin, replace the A23 Motherboard.
(Refer to “A23 Motherboard” on page 2-52.)
— If the supply voltage is bad at the origin, troubleshoot the problem using that assembly's
troubleshooting procedure.
504 FM Inversion
• Replace the A17 Synthesizer (Option 501, 502, 503, 504).