Rice Lake Okidata 320-390-420 Turbo - Service Guide User Manual
Page 110
PITCH. (See Table 6.3 below for details.)
(3) Fatal Alarm
Alarm
Category
Alarm
Alar
m
LED
Display
Remarks
Troubleshooting
Main Control
Alarm
MPU internal
RAM alarm
X
10
Read/write
error
Replace Control/Power
Supply Board
Main Control
Alarm
Program
ROM alarm
X
15
Check sum
error
Replace ROM or
control/Power Supply
Board
Main Control
Alarm
RAM on
Control
Board alarm
X
20
No reaction
when MPU
reads data
Replace Control/Power
Supply Board
Main Control
Alarm
EEPROM
alarm
X
15,
NLQ
No reaction
when MPU
reads data
Replace Control/Power
Supply Board
Firmware
Detection
Alarm
WDT (Watch
Dog
Timeout)
alarm
X
17
MPU is
locked up
and it is
reset after
65ms.
Turn the power OFF and
ON or replace
Control/Power Supply
Board
Firmware
Detection
Alarm
NMI signal
alarm
X
17,
HSD
NMI port of
MPU is kept
low level.
Turn the power OFF and
ON or replace
Control/Power Supply
Board
Firmware
Detection
Alarm
BRK
instruction
alarm
X
17, UTL
FFFF data is
detected due
to MPU
locked up.
Replace ROM or
Control/Power Supply
Board
Serial
Interface
Alarm
MPU internal
RAM alarm
X
10,
HSD
Read/write
error
Replace I/F Board
Serial
Interface
Alarm
ROM alarm
X
15,
HSD
Check sum
error
Replace ROM on I/F
board or I/F Board
Serial
Interface
Alarm
RAM on I/F
board alarm
X
20,
HSD
Read/write
error
Replace I/F Board
Serial
Interface
Alarm
I/F not
mounted
X
12,
HSD
No reaction
from serial
I/F board
Replace I/F Board of
Control Board
X = LED Blink (200ms ON, 200ms OFF)
All other LED Displays: = LED lights up