Canon SmartBase MPC400 Service Manual page 111

SmartBase MPC600F/MPC400 Chapter 4: Maintenance & Service
• The scanning image is abnormal. (Evaluation criteria: Check the copy image's faults.)
Nothing is printed.
(1) Check the connection between the contact sensor and SCNT board (JCS1).
(2) Replace the contact sensor unit.
(3) Replace the SCNT board.
The image has vertical stripes.
(1) Clean the Document glass.
(2) Clean the white sheet.
(3) Check the connection between the contact sensor and SCNT board (JCS1).
(4) Replace the contact sensor unit.
(5) Replace the SCNT board.
The halftone image contains black dots.
(1) Clean the Document glass.
(2) Clean the white sheet.
(3) Check the connection between the contact sensor and SCNT board (JCS1).
(4) Adjust the CS LED lights-on duration. See Page 4-6 .
(5) Replace the contact sensor unit.
(6) Replace the SCNT board.
The color or brightness of the image is not normal.
(1) Clean the Document glass.
(2) Clean the white sheet.
(3) Adjust the CS LED lights-on duration. See Page 4-6 .
(4) Replace the contact sensor unit.
(5) Replace the SCNT board.
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