Canon PC-D320, Service Manual

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PC-D320/PC-D340/FAX-L400 Chapter 4: Maintenance and Service
4-35
The image has thick vertical stripes.
(1) Clean the contact sensor’s scanning glass, platen glass and white sheet.
(2) Check the connection between the contact sensor and the SCNT board (J506).
(3) Replace the contact sensor unit.
(4) Replace the SCNT board.
• The contact sensor operation is faulty.
The CS drive motor does not run. (Evaluation criteria: Check it visually.)
(1) Check the connection between the CS drive motor and the SCNT board (J504).
(2) Replace the CS drive motor.
(3) Replace the SCNT board.
The CS home position sensor is defective (Evaluation criteria: Check it
visually.)
(1) Check the connection between the CS home position sensor and the SCNT board
(J516).
(2) Check whether the CS home position sensor and actuator are in their correct positions.
(3) In test mode check whether the CS home position sensor (J516) is operating correctly.
(4) Replace the CS home potision sensor.
(5) Replace the SCNT board.