Diagnosis By Symptoms - Konica Minolta bizhub C200 Service Manual

9. Troubleshooting
9.3

Diagnosis by symptoms

• Possible causes of various problems and their remedies are shown below. Carry out
troubleshooting according to this table.
Item
Symptom
No.
Received 1 Printed image is excessively
image is stretched in the copy mode?
stretched with
NOTE
ADF
• The following causes may be
2 Is an image received from the
service center also stretched?
3 Any improvement after replacing
MFBU board?
4 Any improvement after replacing
the printer control board?
5 Is the contact of feed roller gears
OK?
6 Any paper dust on feed rollers or
pick-up rollers?
7 Is the pulling out force of feed roll-
ers normal?
Received 1 Printed image is excessively
image is shrunk in the copy mode?
shrunk too
much.
2 Is an image from the service cen-
ter also shrunk?
3
Any improvement after checking
the reading unit?
4 Any improvement after replacing
MFBU board?
5 Any improvement after replacing
the printer control board?
Received 1 Is copied image or a test image
image is too also too light or faded?
light or faded.
NOTE
• The following causes may be
96
Cause
possible (improper docu-
ment handling): special
paper such as very thick
paper, non-carbon print
paper, carbon print paper.
possible (improper setting of
document contrast): a docu-
ment with small blue charac-
ters or file lines
Field Service Ver. 1.0 Jun. 2008
Remedy
YES Go to item 2.
NO Failure in remote terminal (improper
document handling, error in the trans-
mission unit of the remote terminal).
YES Go to item 3.
NO Go to item 5.
YES Replace MFBS board.
NO Go to item 4.
YES Replace the printer control board.
NO Go to item 5.
YES Go to item 6.
NO Replace the feed roller gear unit.
YES Clean up rollers.
NO Go to item 7.
YES Replace the machine.
NO Replace the leaf spring.
YES Go to item 2.
NO Failure in the remote terminal (improper
document handling, error in the trans-
mission unit of the remote terminal).
YES Go to item 4.
NO Go to item 3.
YES END
NO Go to item 4.
YES Replace MFBU board.
NO Go to item 5.
YES Replace the printer control board.
NO Replace the machine.
YES Go to item 2.
NO Failure in the remote side (improper
setting of document contrast, improper
document handling, poor line condi-
tion, and error in the transmission unit
of the remote terminal).