Oki Microline 3320 - Page 106

6 – 3
ALARM
CATEGORY
ALARM
LED DISPLAY
ALARM 10 12 15 17 20
PROP HSD UTL NLQ
REMARKS TROUBLESHOOTING
MAIN CONTROL ALARM FIRMWARE DETECTION ALARM SERIAL INTERFACE ALARM
MPU internal RAM alarm Program ROM alarm RAM on Control Board alarm EEPROM alarm WDT (Watch Dog Timeout) alarm NMI signal alarm BRK instruction alarm MPU internal RAM alarm ROM alarm RAM on I/F board alarm I/F not mounted
Read/write error Check sum error Read/write error No reaction when MPU  reads data MPU is locked up and it  ios reset after 65ms. NMI port of MPU is kept low level. FFFF data is detected due to MPU locked up. Read/write error Check sum error Read/write error No reaction from  serial I/F board
Replace Control/ Power Supply Board Replace ROM or Con- trol/Power Supply Board Replace Control/ Power Supply Board Replace Control/ Power Supply Board Turn the power OFF and ON or replace Control/ Power Supply Board Turn the power OFF and ON or replace Control/ Power Supply Board Replace ROM or Con- trol/Power Supply Board Replace I/F Board Replace ROM on I/F board or I/F Board Replace I/F Board Replace I/F Board or Control Board.
: LED Blink (200ms ON, 200ms OFF) : LED Lights up
(3) Fatal Alarm
Table 6.3 (1/2)