Error Codes - Privacy Plus; Table 6-2: Power-Up Display Codes - Motorola HT750 - UHF/VHF/Low Band - Radio Service Manual

6-2
6.2

Error Codes - Privacy Plus

At power-up, the radio performs cursory tests to determine if its basic electronics and software are in
working order. Problems detected during these tests are presented as error codes on the radio
display. The presence of an error code should prompt the user that a problem exists and that a
service technician should be contacted. Self-test errors are classified as either fatal or non-fatal. Fatal
errors will inhibit user operation, non-fatal errors will not. Use Table 6-2: Power-up Display Codes to
aid in understanding particular power-up error code displays.
Failure Display
FAIL 01/81
FAIL 01/82
ERROR 01/02
FAIL 01/84
FAIL 01/88
FAIL 01/90
FAIL 01/92
ERROR 01/12
FAIL 01/94
FAIL 01/98
NOTE: Due to the nature of fatal ROM and RAM error, it may not be possible to present an
error code on the display. In these cases, the radio will attempt to display the
appropriate error code, generate an illegal mode tone for one second, and then reset
its microcontroller.

Table 6-2: Power-up Display Codes

Type of
Failure
FATAL External ROM/Flash checksum error
FATAL External EEPROM checksum error
NON-FATAL External EEPROM checksum error
FATAL External EEPROM checksum blank
FATAL External RAM error
FATAL Hardware failure
FATAL Internal EEPROM checksum error
NON-FATAL Internal EEPROM checksum error
FATAL Internal EEPROM checksum blank
FATAL Internal RAM error
Description
Power Up Self-Test
Possible Source
Bad ROM data, Defective ROM
Bad external codeplug data,
Defective external EEPROM
Bad external codeplug data
Unprogrammed external code-
plug data
Defective RAM
Defective IC
Bad internal codeplug data,
Defective microcontroller
Bad internal codeplug data
Unprogrammed internal code-
plug data
Defective microcontroller