Motorola CP140

Troubleshooting Tables: Troubleshooting Table for Transmitter 9-3
9.4 Troubleshooting Table for Transmitter
Table 9-4 lists the possible causes of, and corrections for, transmitter problems.
Table 9-4. Transmitter Troubleshooting Table
Symptom Possible Causes
Corrective or Test
(Measurements at Room Temperature)
No RF Power Out 1. Tx Power Level or Fre-
quency
Check Tx power level and frequency programming (from
tuner).
2. No Injection To Power
Amplifier
Send radio to depot.
Antenna Switch/Connector
No Modulation; Distortion
Modulation
1. Programming Check deviation and compensation settings using the
tuner.
2. Transceiver Board Send radio to depot.
Bad Microphone Sensitivity 1. Check Deviation and
Compensation
Realign if necessary.
2. Microphone Send radio to depot.
No/Low Signaling (PL, DPL,
MDC)
1. Programming Check programming.
2. Transceiver Board Send radio to depot.
Cannot Set Deviation
Balance
RF Board Send radio to depot.