Motorola HT750 Service Manual - Page 58
Error Codes - Privacy Plus - reset
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6-2 Power Up Self-Test 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 Table 6-2: Power-up Display Codes Type of Failure Description Possible Source FATAL FATAL NON-FATAL FATAL FATAL FATAL FATAL NON-FATAL FATAL FATAL External ROM/Flash checksum error Bad ROM data, Defective ROM External EEPROM checksum error Bad external codeplug data, Defective external EEPROM External EEPROM checksum error Bad external codeplug data External EEPROM checksum blank Unprogrammed external codeplug data External RAM error Defective RAM Hardware failure Defective IC Internal EEPROM checksum error Bad internal codeplug data, Defective microcontroller Internal EEPROM checksum error Bad internal codeplug data Internal EEPROM checksum blank Unprogrammed internal codeplug data Internal RAM error Defective microcontroller 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.