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October 9th, 1995
6. Document Table Error
Symptom:
The problem cannot be solved with the procedures in the user's manual.
Possible Causes:
•
The document table position sensor is broken.
•
The document table clutch is broken.
•
The feed motor is broken.
•
The ADU is broken.
•
The SCU is broken.
•
The document table is broken.
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
Replace the separation roller.
Replace the SCU.
Note: If the 5 volts 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.
TROUBLESHOOTING PROCEDURES
No
Does 24 volts come to the feed motor and the
document table lift clutch?
Yes
No
Is the harness damaged?
Yes
Replace the harness.
Replace the motor, or the clutch if it has a break
in its internal wiring.
6-9
TROUBLESHOOTING
No
Replace the ADU.
If the 24 volts from the
MBU has is defective,
another error will
be generated.
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