Motorola EP450 service manual Troubleshooting Table for Transmitter

Troubleshooting Tables: Troubleshooting Table for Transmitter 8-3

8.4Troubleshooting Table for Transmitter

Table Table 8-4lists the possible causes of, and corrections for, transmitter problems.

Table 8-4. Transmitter Troubleshooting Table

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

HKLN4215A December 3, 2003