Motorola MTR2000 T5544 Instruction / Field Service Manual page 143

Replacing Receiver Module
68P81096E17-E
09/30/05
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 Receiver Module to cluster and discon-
nect Receiver Module from Station Control Module (SCM).
4. Ensure that the correct Receiver Module is being installed.
5. Install replacement Receiver Module by plugging module into con-
nector on SCM, replacing screws, 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 Squelch Adjust procedure and the RSSI alignment pro-
cedure (if applicable) located in the RSS Service menu online help fa-
cility.
2. If the station includes an external Preselector, perform the Preselector
Field Tuning Procedure of this section.
3. Perform the Preselector Field Tuning Procedure for the internal var-
actor-tuned preselector of this section.
Troubleshooting
29