Scanner System: Abnormal Image - Konica Minolta bizhub C250 Service Manual

Field Service Ver. 1.0 Jul. 2005
18.3.13

Scanner System: abnormal image

A. Typical Faulty Images
4036fs4040c0
B. Troubleshooting Procedure
Step Section
Cable connecting
1 Scanner and
printer
Image Processing
2
Board (PWB-C)
MFP Control
3 Board (PWB-
MFP)
Test Mode
4 [Service Mode]
Image Processing
5 Board (PWB-C)
MFP Control
6 Board
(PWB-MFP)
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
4036fs4041c0
Check Item
Connector is connected properly
with no pins bent.
Connectors on the Image Process-
ing Board are connected properly.
Data on previous page is mixed
with data on current page.
The problem is eliminated as
checked with the image on a test
pattern produced.
The problem is eliminated after the
interface connection cable has
been changed.
The problem has been eliminated
through the checks of steps up to 5.
18. Image quality problem
ABCDE
Data on previous page
ABCDE
ABCDE
AA
Data on current page
4036fs4042c0
Result
NO Reconnect.
NO Reconnect.
NO Reinstall expanded memory.
NO Change interface connection
cable.
NO Change Image Processing
Board.
NO Change MFP Control Board.
Action
399