Motorola EP450 Troubleshooting Tables, Power-Up Error Codes, Operational Error Codes

Chapter 8 Troubleshooting Tables

8.1Power-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 8-1to aid in understanding particular operational error codes.

Table 8-1. 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 reoc-
		curs, replace main board or send radio to depot.
EPRM ERR	EEPROM Hardware Error –	Reprogram codeplug with correct codeplug and retest. If
	Codeplug structure mismatch	message reoccurs, replace main board or send radio to
	or non-existence of code-	depot.
	plug or,
	EEPROM Checksum Error –
	Codeplug checksum is
	wrong

8.2Operational 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 8-2to aid in understanding particular operational error codes.

Table 8-2. 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.