Konica Minolta bizhub PRO 920 Service Manual page 500

13. MALFUNCTION CODE
Classification Code
Motor SC23-05
abnor-
mality
SC23-06
SC23-07
468
Causes
The blowout of ICP for the blade
motor (M14) in the printer control
board (PRCB) is checked.
The drum READY1 signal
(READY condition) cannot be
detected within a specified period
of time after the drum motor (M2)
turns ON. Or, the drum READY1
signal (READY release condition)
cannot be detected within a
specified period of time after M2
turns OFF. At this time, the error
detection signal (blowout of ICP)
of M14 is detected.
It is checked that the movement
of the blade motor (M14) is not
completed.
The drum READY1 signal
(READY condition) cannot be
detected within a specified period
of time after the drum motor (M2)
turns ON. Or, the drum READY1
signal (READY release condition)
cannot be detected within a
specified period of time after M2
turns OFF. At this time, an error
detection signal is not detected.
It is checked that the movement
of the blade motor (M14) is not
completed, and 24V power
source is also checked.
The blade READY signal (READY
condition) cannot be detected
within a specified period of time
after the blade replacement signal
turns ON. Or, the blade READY
signal (READY release condition)
cannot be detected within a
specified period of time after the
blade replacement signal turns
OFF. At this time, an error detec-
tion signal (24V cut off) is
detected.
Field Service Ver2.0 Aug.2005
Resulting Estimated abnormal parts
operation
The main body Drum motor (M2)
stops immedi- Blade motor (M14)
ately to turn OFF Printer control board
the main relay (PRCB)
(RL1). Blade sensor /1 (PS30)
Blade sensor /2 (PS31)
DC power supply /2
(DCPS2)
Wiring harness broken
Loose connection