Motorola Commercial Series - Troubleshooting Table for Receiver; Table 9-3. Receiver Troubleshooting Table

December, 2009 68009328001-A
9-2 Troubleshooting Tables: Troubleshooting Table for Receiver
9.3 Troubleshooting Table for Receiver
Tab le Table 9-3 lists the possible causes of, and corrections for, receiver problems.
Table 9-3. Receiver Troubleshooting Table
Symptom Possible Causes
Corrective or Test
(Measurements at Room Temperature)
Radio Dead; Display Does
Not Turn On
1. Dead Battery. Replace with charged battery.
2. Blown Fuse Send radio to depot.
3. On/Off Switch
4. Regulators
5. Regulator fault
Radio Dead; Display Turns
On
Transceiver Board Send radio to depot.
No Receive Audio, or
Receiver Does Not Unmute
Programming 1. Does the transmitted signal match the receiver
configuration (PL, DPL, etc.)?
2. With the monitor function enabled, can the radio be
unmuted?
Audio Distorted or Not Loud
Enough
Synthesizer Not On
Frequency
Check synthesizer frequency by measuring the
transmitter frequency; realign it off by more than ±150 Hz
(VHF), ±500 Hz (UHF)
RF Sensitivity Poor
1. Synthesizer Not on
Frequency
Check synthesizer frequency by measuring the
transmitter frequency; realign it off by more than ±150 Hz
(VHF), ±500 Hz (UHF)
2. Antenna Switch/
Connector
Send radio to depot.
3. Receiver Front End
Tuning
Check RF front-end tuning for optimum sensitivity using
the tuner.
Radio Will Not Turn Off Transceiver Board Send radio to depot.