Motorola MTR2000 T5544 Instruction / Field Service Manual page 140

Troubleshooting
Replacing Exciter Module
26
Replacement Procedure
1. Turn off station power by turning off breaker at ac source.
2. Remove the station control cluster:
1. Remove module lock screws (2) from front of station control clus-
ter.
2. Disconnect BNC connectors on RF cables connecting PA Module
to Exciter Module, and Receiver Module to Receive antenna port.
3. By pulling forward on cluster pull tabs, carefully slide station
control cluster out of station.
3. Remove screws (4) securing Exciter Module to cluster and disconnect
Exciter Module from Station Control Module (SCM).
4. Ensure that the correct Exciter Module is being installed.
5. Install replacement Exciter Module by plugging module into connec-
tor on SCM, replacing screws (4), and sliding the cluster back into the
station (along the guide rails) to mate with the connector on the back-
plane. (Do not slam the station control cluster against the backplane
or push any harder than necessary to seat the connector.)
6. Install module lock screws (2) to front of station control cluster and
reconnect the RF cables from the PA Module and the Receive antenna
port to their respective modules.
7. Restore power to the station.
Post-Replacement Optimization Procedure
1. Perform the TX Deviation Gain Adjust alignment procedure, located
in the RSS Service menu online help facility. Access the RSS applica-
tion screen through path Service –> Station Alignment –> Transmit-
ter –> Tx Deviation.
2. Perform the Reference Modulation alignment procedure, located in
the RSS Service menu online help facility. Access the RSS application
screen through path Service –> Station Alignment –> Transmitter –>
Ref. Modulation.
68P81096E17-E
09/30/05