SERVICE CALL CONDITIONS
SM 4-7 B121 Series/B259 Series
Trouble-
shooting
No.
Definition
Symptom Possible Cause
Engine start error 670 C
The engine-ready signal is not issued
within 70 seconds after the switch is
turned on.
• Engine board defective
• Controller defective
• Loose connection
ADF gate abnormal 1 760 B
The ADF Gate signal line between the
ADF main board and the BICU is
disconnected.
• ADF main board defective
• Input/output board defective
• Poor connection (ADF Gate line)
between the ADF main board and the
BICU.
ADF gate abnormal 2 761 B
The FGATE signal is not issued from
the ADF within 30 seconds after the
ADF starts feeding.
• ADF connector defective
• SBU board defective
ADF gate abnormal 3 762 B
The FGATE signal is not terminated by
the ADF within 60 seconds after the
ADF starts feeding.
• ADF connector defective
• SBU board defective
Startup without video output end error 800 B
Video transfer to the engine is started,
but the engine did not issue a video
transmission end command within the
specified time.
• Controller board defective
Startup without video input end 804 B
A video transmission was requested
from the scanner, but the scanner did
not issue a video transmission end
command within the specified time.
• Controller board defective
Watchdog error 818 B
The CPU does not access the
watchdog register within a certain time.
• Controller board defective
• Software malfunction – download
controller firmware again
Kernel mismatch error 819 B
Software bug
• Download controller firmware again
Self-Diagnostic Error: CPU 820 B
The central processing unit returned an
error during the self-diagnostic test.
• Controller board defective
• Download controller firmware again
Self-Diagnostic Error: ASIC 821 B
The ASIC returned an error during the
self-diagnostic test because the ASIC
and CPU timer interrupts were
compared and determined to be out of
range.
• Controller board defective
Self-diagnostic Error: Network Interface 823 C
The network interface board returned
an error during the self-diagnostic test.
• Network interface board defective
• Controller board defective
Self-diagnostic Error: NVRAM 824 B
The resident non-volatile RAM returned
an error during the self-diagnostic test.
• Replace the NVRAM on the controller
board
• Replace the controller board
To Next Page