Konica Minolta bizhub PRO 920 Service Manual page 498

13. MALFUNCTION CODE
Classification Code
Wire SC21-04
cleaning
abnor-
mality
SC21-06
466
Causes
• It is checked that the opera-
tions of the transfer/separa-
tion cleaning motor (M18) are
over.
When the transfer/separation
cleaning home sensor (PS11)
is OFF with the main power
switch (SW1) ON, PS11 does
not turn ON within a specified
period of time after the M18
turns ON for a home position
research operation (return
operation). At this time, an
error detection signal (blow-
out of ICP) is not detected.
• PS11 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 opera-
tions of the M18 are over.
The transfer/separation clean-
ing limit sensor (PS12) does
not turn ON within a specified
period of time after the
reverse operation (return
operation) is started for
detection of PS11 being OFF.
Or, PS11 does not turn ON
within a specified period of
time after PS12 turns ON. At
this time, an error detection
signal (blowout of ICP) is not
detected.
The locking of the transfer/sepa-
ration cleaning motor (M18) is
detected.
Motor lock signals are detected
while moving from the transfer/
separation limit sensor (PS12)
side to the transfer/separation
home sensor (PS11) side, and
after a retry operation, a fifth
motor lock signal is detected.
Field Service Ver2.0 Aug.2005
Resulting Estimated abnormal parts
operation
The main body Transfer/separation clean-
stops immedi- ing motor (M18)
ately to turn OFF ADU drive board (ADUDB)
the main relay Transfer/separation clean-
(RL1). ing home sensor (PS11)
Transfer/separation clean-
ing limit sensor (PS12)
Wiring harness broken
Loose connection
Transfer/separation clean-
ing motor (M18)
ADU drive board (ADUDB)
Transfer/separation clean-
ing home sensor (PS11)
Transfer/separation clean-
ing limit sensor (PS12)
Transfer/separation clean-
ing member