S-1: Ccd Clamp/Gain Adjustment Failure - Konica Minolta bizhub C250 Service Manual

16. Malfunction code
16.2 Solution
16.2.1

S-1: CCD clamp/gain adjustment failure

Scanner Assy
Step
1 Correct the harness connection between PWB-A and PWB-C if faulty.
2 Check for possible extraneous light and correct as necessary.
3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty
4 Correct reflective mirror of the Scanner if faulty, or change Scanner.
5 Change PWB-A.
6 Change PWB-C.
16.2.2 P-5: IDC Sensor (Front) failure
16.2.3 P-28 IDC Sensor (Back) failure
IDC / Registration Sensor /1 (SE1)
IDC / Registration Sensor /2 (SE2)
Step
1 Wipe clean the surface of the Transfer Belt with a soft cloth, if it is dirty
2 Change the Image Transfer Belt Unit if the Transfer Belt is damaged.
3 Reinstall or reconnect SE1 or SE2 if it is installed or connected improperly.
4 Clean SE1 or SE2 if it is dirty
5 Check the HV1 connector for proper connection and correct as necessary.
Open and close the Front Door, run an image stabilization sequence, and select [State Confir-
mation] → [Level History 1] to check the IDC value.
6
IDC1: SE1, IDC2: SE2
If the value is 1.0 V or less, change SE1 or SE2.
7 Change PWB-M
416
Relevant Electrical Parts
CCD Sensor Board (PWB-A)
Image Processing Board (PWB-C)
Action
Relevant Electrical Parts
Mechanical Control Board (PWB-M)
High Voltage Unit (HV1)
Image Transfer Belt Unit
Action
Field Service Ver. 3.0 Aug. 2006