Motorola Commercial Series, Basic Service Manual

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Chapter 9 Troubleshooting Tables
9.1 Power-Up Error Codes
During radio power-up, the radio performs dynamic tests to determine if the radio is working properly.
Problems detected during these tests are presented as an error code 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 9-1 to aid in understanding particular operational error codes.
9.2 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 an error code 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 9-2 to aid in understanding particular operational error codes.
Table 9-1. Power-Up Error Code Display
Error Code Possible Causes Corrective Action
RAM ERR RAM Test Failure Retest radio by turning if off and tuning it on again. If
message reoccurs, replace main board or send radio to
depot.
ROM ERR ROM checksum is wrong Reprogram FLASH memory and retest. If message
reoccurs, replace main board or send radio to depot.
EPRM ERR EEPROM Hardware Error –
Codeplug structure mismatch
or non-existence of code-
plug or,
EEPROM Checksum Error –
Codeplug checksum is
wrong Reprogram codeplug with correct codeplug and retest. If
message reoccurs, replace main board or send radio to
depot.
Table 9-2. Operational Error Code Display
Error Code Possible Causes Corrective Action
SYN UNLK Synthesizer Out-of-Lock Verify codeplug and reprogram if necessary. If message
reoccurs, replace main board or send radio to depot.