5-2 POWER UP SELF-TEST
2.0 Error Codes (MDC Radios)
Turning on the radio starts a self-test routine that checks the RAM, ROM checksum, EEPROM
hardware, and EEPROM checksum. If these checks are successful, the radio generates two high-
pitched self-test pass tones. If the self-test is not successful, one low-pitched tone is heard. Radios
with displays are able to display the error codes. Following are the possible errors and the related
corrections.
Table 5-2 Power Up Error Codes
Possible Errors To correct the problem...
RAM test failure. Retest the radio by turning it off and turning it on
again. If bad tone reoccurs, replace RAM (U0122).
Codeplug structure mis-
match or non existence of
codeplug.
Reprogram codeplug with correct version and retest
radio. If message reoccurs, replace EEPROM
(U0111).
Wrong codeplug checksum. Reprogram codeplug.
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