Konica Minolta bizhub C650 Service Manual page 654

Field Service Ver. 8.0 Jun. 2008
Code
P-18 PC charge cleaning trouble 1
P-21 Color regist test pattern failure
P-22 Color regist adjust failure
P-27 Secondary transfer ATVC failure
P-31 K PC encoder sensor malfunction
Item
• Charging cleaner return sensor is not interrupted even
after the specified time has passed when the wire
cleaning material is moving forward.
* Under the situation above occurs, control will be
switched to the return operation after the warning is
given. When the charging cleaner home sensor is not
interrupted after the specified time has passed during
the return operation, trouble code C-2101 will be given.
• The number of points detected in the main scan direc-
tion is more or less than the specified value during
main scan direction registration correction.
• The number of points detected in the sub scan direction
is more or less than the specified value during sub scan
direction registration correction.
• The color shift amount is greater than the specified
range during main scan direction registration correction.
• The color shift amount is greater than the specified
range during sub scan direction registration correction.
• On the color shift test pattern, the maximum and mini-
mum deviations detected in the main and sub scan
directions go over the predetermined value.
• An abnormal average value is detected during an
adjustment of the second image transfer ATVC value.
• While the K PC drum motor is rotating at a stable pace
and lock signals are in an active (LOW=0) condition, an
abnormal encoder pulse width continues to be detected
over the predetermined period of time.
16. Malfunction code
Description
599