Power Up Self-Test; Error Codes - Conventional And Ltr Radios; Power-Up Display Codes - (Conventional Radios) - Motorola HT1250-LS+ Basic Service Manual

Chapter 6

Power Up Self-Test

6.1

Error Codes - Conventional and LTR 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 the error code(s) is displayed. The displayed error codes and related
corrections are listed as follows:
If the error code
displayed is...
"RAM TST ERROR"
"ROM CS ERROR"
"EEPRM HW ERROR"
"EEPRM CS ERROR"
No Display
Table 6-1. Power-up Display Codes - (Conventional Radios)
then, there is
a...
RAM test failure.
Wrong ROM check-
sum.
Codeplug structure
mismatch or non
existence of
codeplug.
Wrong codeplug
checksum.
Bad display module
connection or dam-
aged display mod-
ule.
To correct the problem...
Retest the radio by turning it off and turning it on
again. If message reoccurs, replace RAM (U405).
Reprogram FLASH memory, then retest. If message
reoccurs, replace ROM (U406).
Reprogram codeplug with correct version and retest
radio. If message reoccurs, replace EEPROM
(U407).
Reprogram codeplug.
Check connection between main board and display
module or replace with new display module.
6-1