Field Service Ver. 1.0 Jun. 2008 17. Malfunction code
291
Troubleshooting
C2151 Secondary transfer roller
pressure welding alienation
• During a retraction operation of the 2nd image trans-
fer roller, the 2nd image transfer welding alienation
sensor cannot detect the 2nd image transfer roller at
its retracted position within a predetermined period
of time after the 2nd image transfer retraction motor
starts rotating.
• During a pressure operation of the 2nd image trans-
fer roller, the 2nd image transfer welding alienation
sensor cannot detect the 2nd image transfer roller at
its pressed position within a predetermined period of
time after the 2nd image transfer retraction motor
starts rotating.
B
C2152 Transfer belt pressure welding
alienation
• During a retraction operation of the transfer belt, the
transfer belt retraction sensor cannot detect the
transfer belt at its retracted position within a prede-
termined period of time after the transfer belt retrac-
tion clutch is turned ON.
• During a pressure operation of the transfer belt, the
transfer belt retraction sensor cannot detect the
transfer belt at its pressed position within a predeter-
mined period of time after the transfer belt clutch is
turned ON.
B
C2164 PC charge malfunction • When electrostatic charge output is ON, electrostatic
charge leak detection system continues to detect
leaks for a predetermined period of time.
B
C2253 Color PC motor’s failure to turn • The motor lock signal remains HIGH for a predeter-
mined continuous period of time while the motor is
turning.
B
C2254 Color PC motor’s turning at
abnormal timing
• The motor lock signal remains LOW for a predeter-
mined continuous period of time while the motor
remains stationary.
B
C225D Color dev. unit engagement/
disengagement failure
• The gears remain disengaged after the lapse of a
predetermined period of time after the engagement
operation is started by the color dev. unit engaged
motor.
• The gears remain engaged after the lapse of a pre-
determined period of time after the disengagement
operation is started by the color dev. unit engaged
motor.
B
C2451 Release new transfer belt unit • A new installation is not detected when a new trans-
fer cleaner unit (image transfer belt unit) is installed.
B
C2551 Abnormally low toner density
detected cyan TCR sensor
• TC ratio in the developing machine, which is deter-
mined by toner replenishing amount control mecha-
nism, is 4 % or less for a given number of times
consecutively.
B
C2552 Abnormally high toner density
detected cyan TCR sensor
• TC ratio in the developing machine, which is deter-
mined by Toner replenishing amount control mecha-
nism, is 11 % or more for a given number of times
consecutively.
• When the connector of the TCR sensor is discon-
nected.
B
Code Item Detection timing
Rank
d-Color MF201
Y109660-1 Sevice Manual
d-Color MF201
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