Konica Minolta bizhub PRO 920 Service Manual page 531

Field Service Ver2.0 Aug.2005
Classification Code
ZU SC77-57
abnor-
mality
SC77-58
FS SC77-81
abnor-
mality
SC77-91
SC77-92
SC77-98
Commu- SC80-01*
nication
abnor-
mality
SC80-02*
SC80-03*
ISW SC80-11
abnor-
mality
Causes
After the punch motor (M4) turns
on, the punch operation is not
completed even when a specified
period of time elapses. (The
punch home sensor (PS6) does
not turn OFF, or it does not turn
ON after being turned OFF.)
After the punch switching motor
(M8) starts the home position
search, the punch switching
switch (MS2) does not turn ON
even when a specified period of
time elapses.
After the gate motor (M12) starts
the home position search, the
gate home sensor (PS16) does
not turn ON even when a speci-
fied period of time elapses.
Communication error when the
sub CPU in the FS control board
(FSCB) is receiving data.
Communication error when the
main CPU in the FS control board
(FSCB) is receiving data.
When the FS is started, an
unwritten flash ROM is detected.
Initial communication error
between OACB/PRCB. When the
main power switch (SW1) is
turned ON, a response from the
printer control board (PRCB) is
not received even after a speci-
fied period of time elapses.
Communication error between
OACB/PRCB.
Communication error between
OACB/OB1.
When the main power switch
(SW1) is ON, a region into which
no write was made by the ISW is
detected in the printer control
program.
13. MALFUNCTION CODE
Resulting Estimated abnormal parts
operation
The main body ZU control board (ZUCB)
and the FS stop Punch motor (M4)
immediately to Punch clutch (CL1)
turn OFF the Punch home sensor (PS6)
main relay (RL1)
ZU control board (ZUCB)
Punch switchover motor
(M8)
Punch switchover switch
(MS2)
FS control board (FSCB)
Gate motor (M12)
Gate home sensor (PS16)
. FS control board (FSCB)
The main body Printer control board
stops immedi- (PRCB)
ately to turn OFF Overall control board
the main relay (OACB)
(RL1). Loose connection
Overall control board
(OACB)
Operation board /1 (OB1)
Loose connection
S and CA program
499