C6704: Scanner Time Out; C6751: Ccd Clamp/Gain Adjustment Failure - Konica Minolta bizhub C450 Service Manual

16. Malfunction code
16.6.79

C6704: Scanner Time Out

MFP Control Board (PWB-MFPC)
Copier Board (PWB-CF)
Step
Select "Service Mode" → "State Confirmation" →
"Memory/HDD Adj." → "Memory Bus Check" →
1
"Scanner→Memory."
Check the connectors between PWB-C and
2 PWB-CF for proper connection and correct as
necessary.
3 Change PWB-MFPC.
4 Change PWB-C.
16.6.80

C6751: CCD clamp/gain adjustment failure

Scanner Assy
Step
Correct the harness connection between PWB-A
1
and PWB-C if faulty.
Check for possible extraneous light and correct
2
as necessary.
Clean the lens, mirrors, CCD surface, and shad-
3
ing sheet if dirty
Correct reflective mirror of the Scanner if faulty,
4
or change Scanner.
5 Change PWB-A.
6 Change PWB-C.
364
Relevant Electrical Parts
Image Processing Board (PWB-C)
Action
Relevant Electrical Parts
CCD Sensor Board (PWB-A)
Image Processing Board (PWB-C)
Action
Field Service Ver. 1.0 Mar. 2005
WIRING DIAGRAM
Control Signal (Electrical
Component)
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WIRING DIAGRAM
Control Signal (Electrical
Component)
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Location
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Location
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