Scanner Does Not Feed Properly - Canon imageFORMULA DR-C125 Service Manual

4. Scanner Does Not Feed Properly

Note: The "paper jam" and "double feed" error messages may be displayed due to sensor
problems.
Cause/Faulty
Locations
Document
Placing documents
Rollers
Parts in feed path
Drive transmission
system
Motors
Sensors
Front unit PCB
Control PCB
COPYRIGHT © CANON ELECTRONICS INC. 2011
Step Check Item
1 Specified document?
(thickness, size, fold or curl)
2 Are documents
together?
3 Is the position
document guide correct?
4 Is the position of the feed
selection lever correct?
5 Are the rollers
correctly?
6 Are they dirty or deformed?
7 Parts touching
installed properly? (no float,
slant or gaps)
8 Is the surface
documents
scratches or burrs)
9 Does an abnormal
occur while feeding?
Are any of
damaged or the belts loose?
10 Is the operation normal when
you perform an operation
check with the service mode?
11 Is the operation normal when
you perform an operation
check with the service mode?
12 Does replacing the front unit
PCB fix the problem?
13 Does replacing the control
PCB fix the problem?
Table 5-404
CANON DR-C125 FIRST EDITION
CHAPTER 5 TROUBLESHOOTING
Result
NO
stuck YES
of the NO
NO
attached NO
NO
documents NO
touching NO
smooth? (No
noise YES
the gears
NO
NO
YES
YES
Action
Use documents
compliant with the
specified.
Fan the documents
well.
Correct the position.
Set the feed selection
lever to the correct
position.
Attach the rollers
correctly.
Clean or replace the
rollers.
Attach the parts
correctly.
Replace faulty parts.
Attach the parts
correctly.
Replace inferior parts.
Check the cable
connections.
Replace the motors.
Check the attachment
of sensors and sensor
levers. Check the
connections of sensor
cables.
Done.
Done.
5-27