Power Up Self-Test; Error Codes - Motorola EX500 Basic Service Manual

Chapter 6

Power Up Self-Test

6.1

Error Codes

To start the radio's self-test routine, turn the radio on using the ON/OFF volume control button. The
self-test routine checks the RAM, ROM checksum, EEPROM hardware and EEPROM checksum. If
these checks are successfully completed, the radio will generate the Self-Test Pass Tone. If the radio
fails the self-test, it will emit a low-pitch tone.
Error Code
"RAM TST ERROR"
"ROM CS ERROR"
"EEPRM HW ERROR"
"EEPRM CS ERROR"
No Display
Explanation
RAM Test Failure
ROM Checksum is
wrong.
Codeplug structure
mismatch, non
existence of
codeplug.
Codeplug
checksum is wrong.
Display module is
not connected
properly.
Display module is
damaged.
Corrective Action
Retest the radio by turning it off and turning it on
again. If the message reoccurs, replace the main
board or send the radio to nearest Motorola Depot.
Reprogram FLASH Memory, then retest. If the
message recurs, replace the main board or send the
radio to the nearest Motorola Depot.
Reprogram the codeplug with the correct version and
retest the radio. If the message recurs, replace the
main board or send the radio to the nearest Motorola
Depot.
Reprogram the codeplug.
Check the connection between the main board and
the display module.
Replace with a new display module.
6-1