Motorola APX 1000 - Transmitter Troubleshooting

8-4 Basic Troubleshooting: Transmitter Troubleshooting
8.4 Transmitter Troubleshooting
Table 8-4 lists the possible causes of, and corrections for, transmitter problems.
Table 8-4. Transmitter Troubleshooting Chart
Symptom Possible Cause
Correction or Test (Measurements
Taken at Room Temperature)
No RF Power Out 1. TX Power Level or Frequency Check TX power level and frequency
programming (from tuner)
2. No Injection To Power
Amplifier
Send radio to depot
3. Antenna Switch/Connector
No Modulation;
Distorted Modulation
1. Programming Check deviation and compensation
settings using the tuner
2. Main 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. Main Board Send radio to depot
Cannot Set Deviation
Balance
Main Board Send radio to depot