No Scanner Is Found; Scanning Does Not Start - Canon imageFORMULA DR-M140 Service Manual

2. No Scanner is Found

Note: You should install the driver on the computer before connecting the scanner.
Cause/Faulty
Locations
Power Supply
Connection of the
USB cable
Computer and
interface card

3. Scanning Does Not Start

Note: The "cover open" and "no document" error messages may be displayed and scanning
may not start due to sensor problems.
Cause/Faulty
Locations
System
Software
Connection of the
connector (control
PCB)
Drive transmission
system
Motors
Sensors
Each sensor PCB
Control PCB
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Step Check Item
1 Is power supplied to the
machine?
2 Is the USB cable connected?
3 Are the computer
interface card compatible?
Table 5-402
Step Check Item
1 Was the problem solved by
resetting the power of the
scanner or
computer?
2 Was the problem solved by
reinstalling the scanner driver
or application?
3 Are the motor and sensor
connectors
correctly?
4 Is the transmission system of
the motors normal?
Are parts such as gears and
belts normal?
5 Is the operation normal when
you perform an operation
check with the service mode?
6 Is the operation normal when
you perform an operation
check with the service mode?
7 Was the problem solved by
replacing the PCB?
8 Was the problem solved by
replacing the control PCB?
Table 5-403
CANON DR-M140 FIRST EDITION
CHAPTER 5 TROUBLESHOOTING
Result
NO
NO
and NO
Result
YES
restarting the
YES
NO
connected
NO
NO
NO
YES
YES
Action
Perform "1. Power Does
Not Come ON".
Connect the connectors
correctly.
Use compatible
equipment.
Action
Done.
Done.
Connect the connectors
correctly.
Attach the parts
correctly.
Replace the parts.
Check the cable
connections. Replace
the motors.
Check the attachment
of sensors and sensor
levers. Check
connections of sensor
cables.
Done.
Done.
5-39
the