Canon PIXMA MP750, Service Manual

Page: 26 / 135

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Symptom Solution Remarks
The document does not
separate.
1) Check whether the
document feed motor is
driving all the rollers. (Check
for any damaged gears or
foreign matter stuck inside.)
(2) ) Cleaning the Separate
Rollor and
RubberSheet. See
Chapter 4. Cleaning your
Machine.
(3) Replace the separation
roller ass’y and Upper guide
ass’y.
Scanning
problems
Faulty scanner unit's
sensors (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.
(3) Check the connection from
the ADF board to the sensor
board sub PCB (JADF1).
(4) Check the connection from
the sensor board (JADF1) and
SPCNT board.
(5) Replace the Document
sensor.
(6) Replace the ADF board
ass’y.
(7) Replace the SPCNT board
ass’y.
The
Scanning
Image
Is
Abnormal Nothing is printed.
(1) Check the connection
between the contact sensor
and SPCNT board (JCCD1).
(2) Replace the SCANNER
unit.
(3) Replace the SPCNT board
ass’y.