TROUBLESHOOTING PROCEDURES
22 December 1998
6-6
Document Table Error
Symptom:
The problem cannot be solved with the procedures in the user's manual.
Possible Causes:
•
Defective document table position sensor
•
Defective document table clutch
•
Defective paper feed motor
•
Defective ADU
•
Defective SCU
•
Damaged document table
Procedure:
Is the document table itself OK?
Yes
No
Replace it.
Does the table work (up/down operation)?
Yes
No
Does the separation roller mechanism work?
Yes
No
Does 24 volts come to the paper feed motor?
Yes
No
Is the cable damaged?
Yes
No
Replace the ADU.
If the 24 volts from the PSU
is defective, another error
will be generated.
Replace the cable.
Replace the motor, if it has a defective.
Does the document table lift clutch work.
Yes
No
Does 24 volts come to the document table lift clutch?
Yes
No
Is the cable damaged?
Yes
No
Replace the ADU
Replace the cable.
Replace the document table lift clutch
Check the table lift mechanism.
Replace the SCU.
NOTE: If the 5-volt line is defective, the ADF LEDs will not work, so the error type
will not be visible. Therefore it can be assumed that there is a problem with
a timing signal. All timing signals are generated in the SCU and the
problem can be fixed by replacing the SCU.
