Konica Minolta bizhub 500 Service Manual page 631

13. MALFUNCTION CODE
Classification Code
Image C-4001
proces-
sing
abnor-
mality
Motor C-4101
speed
abnor-
mality
Image C-4401
proces-
sing
abnor-
mality
C-4701
Commu- C-5001
nication
abnor-
mality
C-5002
C-5003
298
Causes
Index board (INDEXB) contact
abnormality.
Polygon motor (M5) speed abnor-
mality.
When M5 is ON, an error signal is
detected 3 times in succession
within a specified period of time.
Laser drive board (LDB) abnor-
mality.
When an overcurrent flows for
laser output.
Laser index abnormality.
When the cycle of the index is dif-
ferent from an expected value.
Main body control board commu-
nication abnormality 1
Communication abnormality
between the overall control board
(OACB) and the scanner drive
board (SDB).
Main body control board commu-
nication abnormality 2
Communication abnormality,
incoming command abnormality,
platen operation sequence
abnormality to the sub CPU in the
overall control board (OACB).
Sub CPU A/D conversion abnor-
mality.
There is no response 2 times in
succession to the A/D conversion
request of the overall control
board (OACB).
Field Service Ver1.0 Feb.2006
Resulting Estimated abnormal parts
operation
The main body Index board (INDEXB)
stops immedi- Overall control board (OACB)
ately to turn OFF
the main relay
(RL1).
Polygon motor (M5)
Printer control board (PRCB)
Laser drive board (LDB)
Overall control board (OACB)
Index board (INDEXB)
Overall control board (OACB)
Overall control board (OACB)
Scanner drive board (SDB)
Printer control board (PRCB)