November 11, 2004 6881094C12-A
8-4 Troubleshooting: Transmitter Troubleshooting
8.6 Transmitter Troubleshooting
Table 8-5 lists the possible causes of, and corrections for, transmitter problems.
8.7 Encryption Troubleshooting
Table 8-6 lists the possible causes of, and corrections for, encryption problems.
Table 8-5. 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. VOCON 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. VOCON Board Send radio to depot
Cannot Set Deviation
Balance
RF Board Send radio to depot
Table 8-6. Encryption Troubleshooting Chart
Symptom Possible Cause Corrective Action
No “KEYLOAD” on Radio Display When
Keyloading Cable is Attached to the Radio
Side Connector
1. Defective Keyload Cable Send radio to depot
2. Defective Radio
Keyloader Displays “KEY LOAD FAILURE!” 1. Wrong Keyloader Type Use correct keyloader
type. Refer to Keyloader
User Guide for more
information
2. Bad Keyloader Try another keyloader
3. Defective Radio Send radio to depot