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TROUBLESHOOTING
COPY QUALITY TROUBLESHOOTING
6. TROUBLESHOOTING
6.1. COPY QUALITY TROUBLESHOOTING
6.1.1. Received Copies
If there is no fault in the transmitting terminal or on the line, but the copy qual-
ity is bad, either:
•
Check that the printer cover is closed properly.
•
Check the thermal head pulse width.
•
Clean the thermal head (soft cloth, do not use water)
•
Replace the thermal head or FCU.
If the output is always stretched: Check the printer mechanism.
6.1.2. Copies made in Copy Mode
The following faults must be considered in addition to the printer faults men-
tioned above.
Symptom
Blank or black copies
Vertical lines
Uneven density
Magnification
Blurred characters
Filled-in characters
Side-to-side registration
error
One side darker than the
other
Partial scanning
Stretched output
Causes
Blocked optical path
Scanner or PCB failure
Dirty mirror, lens, exposure
glass, or xenon lamp
Error bit in CCD
Scan line out of position
Dirty mirror, lens, exposure
glass, or xenon lamp
Old xenon lamp
Check the reduction rate.
Adjust the focusing.
Adjust the reduction rate.
Adjust the reduction rate.
Adjust the scan start
position.
Check the CCD waveform
flatness.
Scan line is out of position
Defective scanner timing belt
6-1
November 30th, 1991
Remedies
Check the optical path.
Replace FCU or SBU.
Clean with a soft cloth.
Replace SBU.
See the SBU adjustments
(section 5-2).
Clean with a soft cloth.
Replace.
See the SBU adjustments
(section 5-2).
Replace.
6
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