Scanning Problems - Canon SmartBase MPC400 Service Manual

SmartBase MPC600F/MPC400 Chapter 4: Maintenance & Service

4.3.3 Scanning problems

• Faulty scanning (Evaluation criteria: Test print is good, but the copied image is
no good.)
• The document is not fed.
The document feed motor does not run. (Evaluation criteria: Check it visually.)
(1) Check the connection from the document feed motor to the ADF board (JFM).
(2) Check the connection from the ADF board and SCNT board (JADF1).
(3) Replace the document feed motor.
(4) Replace the ADF board.
(5) Replace the SCNT board.
The document slips against the rollers. (Evaluation criteria: Check it visually.
Stretched copy image.)
(1) See page 4-4 and clean the document reading section.
(2) Replace the ADF section's rollers.
The document does not separate. (Evaluation criteria: Check it visually.)
(1) Check whether the document feed motor is driving all the rollers. (Check for any damaged gears
or foreign matter stuck inside.)
(2) See page 4-4 and clean the separation roller and separation guide.
(3) Replace the separation roller and separation guide.
Faulty scanner unit's sensors (Evaluation criteria: The placed document or
transported document is not detected.)
(1) Check for any faulty sensors while executing the copying operation and test mode.
(2) Check the connection from Document sensor and Document edge sensor to the ADF board
(JDS, JDES).
(3) Check the connection from the ADF board to the SCNT board (JADF1).
(4) Replace the SCNT board.
(5) Replace the ADF board.
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