Motorola MTR2000 T5544 Instruction / Field Service Manual page 136

Troubleshooting
STOP
IMPORTANT
22
Validating Repairs
After replacing a faulty module with a known good module, perform one
of the following tests to validate the repair before leaving the site.
• If the faulty module was detected as the result of running station di-
agnostics via the RSS, run the diagnostics again after the repair is
made to ensure that the replacement module passes all diagnostic
tests.
• If the faulty module was detected by an operational failure, perform
the operation to ensure that the repair corrected the reported/detect-
ed failure.
Replacing Fans
If a fan on a 500 W Power Supply Module or on a high power Power Am-
plifier fails, it can be replaced without having to exchange the entire mod-
ule. The fan can be ordered with part number 59-83663R09.
The procedure is:
1. Turn off station power by turning off breaker at ac source.
2. Remove screws (4) securing fan to PA or Power Supply casting.
3. Unplug fan electrical power connector.
4. Lift the fan away from the casting (the electrical power connector will
detach when the fan is lifted).
5. Ensure that the correct fan is being installed.
6. Position the fan on the casting.
7. Push the power connector into the plug in the casting.
8. Secure the fan to the casting with the 4 screws.
9. Restore power to the station.
Replacing Fuses
The procedure is:
1. Turn off station power from source (e.g., ac breaker).
2. Remove fuse cover plate located on the backplane shield by unscrew-
ing one M4 screw.
3. Pull defective fuse carefully with small needle nose pliers.
4. Replace new fuse (part # 6583049X16) carefully with small needle
nose pliers.
For continued protection of the station against risk of fire, replace
the fuse only with the same type and rating of fuse.
5. Restore power to the station.
68P81096E17-E
09/30/05