
Power Up Self-Test Error Codes
3-7
3.8
Power Up Self-Test Error Codes
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. The displayed error codes and related corrections
are as follows:
•
“RAM ERR” for <RAM Test Error>
•
“ROM CS” for <ROM Checksum Error>
•
“EPM ERR” for <EEPROM Hardware Test Error>
•
“EPM CS” for <EEPROM Checksum Error>
NOTE
Radio without display emits only “bonk” (300 Hz) tone if it fails the self-test.
Table 3-2 Error Codes
Error Code
Explanation
Corrective Action
“RAM ERR”
RAM Test Failure
Retest radio by turning it off and turning it on again. If
message reoccurs, replace main board or send radio
to nearest Motorola Depot.
“ROM CS”
ROM Checksum is
wrong.
Reprogram FLASH Memory, then retest. If message
reoccurs, replace main board or send radio to near-
est Motorola Depot.
“EPM ERR”
Codeplug structure
mismatch, non
existence of code-
plug.
Reprogram codeplug with correct version and retest
radio. If message reoccurs, replace main board or
send radio to nearest Motorola Depot.
“EPM CS”
Codeplug check-
sum is wrong.
Reprogram codeplug.
No Display
Display module is
not connected prop-
erly.
Display module is
damaged.
Check connection between main board and display
module.
Replace with new display module.