6-18. TROUBLESHOOTING SCHEMATICS
These are the troubleshooting schematics that are referenced by the MAPS chart. Each figure is a partial sche-
matic diagram of the test adapter. Each shows only the wiring and components that would be in use when a par-
ticular fault occurred. These are used as a guide for testing the test adapter wiring for opens, shorts, faulty
switches, etc. All the wiring involved in a fault may be tested without having to check the entire test adapter.
Do the following when using the troubleshooting schematics:
Disconnect all test equipment from the test adapter. Turn off the test power supply.
Remove test adapter from chest. If necessary, remove the ref rt, ref dra, ref rcu, and ics from the test
Use the DMM to test for:
continuity through relay control lines
correct switch operation
correct indicated voltage levels (test power supply and DC switch must be turned on)
If you connect the test adapter to a 115 V ac supply, observe all high voltage safety precautions.
Check only the schematics listed in the MAPS chart and check them in the order listed.
Repair any repairable faults that are discovered. After each repair is made, test it again to verify repair.