Konica Minolta bizhub PRO 920 Service Manual page 496

13. MALFUNCTION CODE
Classification Code
Wire SC21-01
cleaning
abnor-
mality
464
Causes
• When the charge cleaning
home sensor (PS41) is OFF
with the main power switch
(SW1) ON, PS41 does not
turn ON within a specified
period of time after the charge
cleaning motor (M23) turns
ON for home position
research operation (return
operation). At this time, an
error detection signal (blow-
out of ICP) is not detected.
• PS41 does not turn OFF
within a specified period of
time after the reverse opera-
tion (return operation) is
started. At this time, an error
detection signal (blowout of
ICP) is not detected.
• It is checked that the time for
the M23 operations is over.
The charge cleaning limit sen-
sor (PS42) does not turn ON
within a specified period of
time after the reverse opera-
tion (return operation) is
started for detection of PS41
being OFF. Or, PS41 does not
turn ON within a specified
period of time after PS42
turns ON. At this time, an
error detection signal (blow-
out of ICP) is not detected.
Field Service Ver2.0 Aug.2005
Resulting Estimated abnormal parts
operation
The main body Charge cleaning motor
stops immedi- (M23)
ately to turn OFF Printer control board
the main relay (PRCB)
(RL1). Charge cleaning home sen-
sor (PS41)
Charge cleaning limit sensor
(PS42)
Wiring harness broken
Loose connection