(3)Fatal Alarm
Table 6.3 (1/2)
ALARM
CATEGORY
MAIN CONTROL
LED DISPLAY |
|
ALARM | REMARKS |
ALARM 10 12 15 17 20 | PROP HSD UTL NLQ |
MPU internal | Read/write error |
RAM alarm |
|
Program ROM | Check sum error |
alarm |
|
TROUBLESHOOTING
Replace Control/ Power Supply Board
Replace ROM or Con- trol/Power Supply Board
6 – 3
ALARM
FIRMWARE DETECTION ALARM
RAM on Control Board alarm
EEPROM alarm
WDT (Watch Dog Timeout) alarm
NMI signal alarm
BRK instruction alarm
MPU internal RAM alarm
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.
FFFFdata is detected due to MPU locked up. Read/write error
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
SERIAL INTERFACE ALARM
ROM alarm | Check sum error | |
| ||
RAM on I/F board | Read/write error | |
alarm |
| |
I/F not mounted | No reaction from | |
serial I/F board | ||
| ||
| : LED Blink (200ms ON, 200ms OFF) | |
| : LED Lights up |
Replace ROM on I/F board or I/F Board Replace I/F Board
Replace I/F Board or Control Board.
