Chapter 5 Power Up Self-Test; Error Codes - Conventional Radios - Motorola CDM Series Basic Service Manual

Chapter 5
Power Up Self-Test
5.1

Error Codes - Conventional 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, or a musical tone (selected in CPS). 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 listed in Table 5-1.
If the error code
displayed is...
"RAM TST ERROR"
"EEPRM HW ERROR"
"EEPRM CS ERROR"
No Display
Table 5-1: Power Up Error Codes
then, there is a...
RAM test failure.
Codeplug structure mis-
match or non existence
of
codeplug.
Wrong codeplug check-
sum.
Bad display module
connection or damaged
display module.
To correct the problem...
Retest the radio by turning it off and turning it on
again. If message reoccurs, replace RAM (U0122).
Reprogram codeplug with correct version and retest
radio. If message reoccurs, replace EEPROM
(U0111).
Reprogram codeplug.
Check connection between main board and display
module or replace with new display module.
5-1