32
Operational Error
Codes
During radio operation, the radio performs dynamic tests to determine
if the radio is working properly. Problems detected during these tests
are presented as error codes on the radio’s display. The presence of an
error code should prompt a user that a problem exists and that a
service technician should be contacted. Use Table 15 to aid in
understanding particular operational error codes.
Table 15 Operational Error Code Displays
Error Code Description Corrective Action
FAIL 001 Synthesizer Out-of-Lock a. Reprogram codeplug
b. Send radio to depot
FAIL 002 Selected Mode/Zone Codeplug Checksum Error Reprogram codeplug
Table 16 Receiver Troubleshooting Chart
Symptom Possible Cause
Correction or Test (Measurements
Taken at Room Temperature)
Radio Dead; Display Does
Not Light Up
1. Dead Battery Replace with charged battery.
2. Blown Fuse Send radio to depot.
3. On/Off Switch
4. Regulators
Radio Dead; Display
Lights Up
1. Controller Board Send radio to depot.
2. RF Board
No Receiver Audio or
Receiver Does Not Unmute
Programming a. Does the transmitted signal match the receiver
configuration (PL, DPL, etc.)?
b. 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; if off by more than ±250Hz, realign.
RF Sensitivity Poor 1. Synthesizer Not
On Frequency
Check synthesizer frequency by measuring the transmitter
frequency; if off by more than ≤ ±600Hz, realign.
2. Antenna Switch Send radio to depot.
3. Receiver Front-
End Tuning
(VHF/ UHF only)
Check RF front-end tuning for optimum sensitivity using
the RSS.
Radio Will Not Turn Off Controller Board Send radio to depot.
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