Service Manual

ERROR CODE LIST
4-49
IV DIAGRAMS
3
Main body
Image control
communication
abnormalities
E56-4 Communication abnormality
between system-control of the
SCB (System control board) and
engine-control of the CB (Main
body control board).
While on standby, the FNS
Ready signal has not been
detected for the specified period
of time.
Engine power
supply OFF
SCB (System control board)
FNSCB (FNS control board)
CB (Main body control board)
E56-5 Communication abnormality
between system-control of the
SCB (System control board) and
engine-control of the CB (Main
body control board).
Platen-original size notification
timeout.
SCB (System control board)
CB (Main body control board)
Operations
unit control
abnormalities
E56-6 Operation status error
Memory access error at copy
insertion.
SCB (System control board)
E56-7 Operation management error
Control error at panel manager
E56-8 Operation drawing error 1
Screen-data drawing mismatch
E56-9 Operation drawing error 2
Drawing-component data error
E56-10 Operation panel communication
abnormality
Communication error with the
operating section CPU
SCB (System control board)
OB (Operation board)
Image control
communication
abnormalities
E56-11
(Except
the 7145)
Machine type judgement abnormality
The type information of the SCB
(System control board) is different
from the type information of the
CB (Main body control board).
SCB program
E56-12 Communication abnormality
between system-control of the
SCB (System control board) and
engine-control of the CB (Main
body control board). There is no
response from the engine after a
signal is sent for periodic commu-
nication.
SCB (System control board)
CB (Main body control board)
Classification
Warning
code
Causes Resulting
operation
Estimated abnormal parts