Troubleshooting; Copy Quality Problems - Ricoh FAX220 Service Manual

5. TROUBLESHOOTING

5-1. COPY QUALITY PROBLEMS

5-1-1. Received Copies
If there is no fault in the receiving terminal or on the line, but the copy quality is bad, do the following:
• Check that the thermal head, platen roller and spring plate assembly are assembled completely.
• Clean the thermal head (soft cloth and alcohol).
• Replace the thermal head or FDU.
5-1-2. Printouts Made in Copy Mode
If printouts of received fax messages are OK but printouts made using copy mode are not, the following faults must
be considered in addition to the printer faults mentioned above.
Symptom
Blank or black copies
Vertical black lines on the copy
Uneven density
Magnification
Blurred characters
Filled-in characters
Side-to-side registration error
One side darker than the other
Image only partially scanned
• Check the scanner/sensor mechanism and adjust or replace any
defective parts.
• Replace the SBU or FDU.
• Clean the scanner optics and LED array (soft cloth).
• Replace the SBU if there are any sharp peaks or dropouts in the CCD
waveform.
• Adjust the scan line position (see section 4-5-3).
• Clean the scanner optics and LED array (soft cloth).
• Replace the LED array if it is defective.
• Check that the mirrors are assembled correctly on the scanner base.
• Adjust the focusing (see section 4-5-3).
• Adjust the focusing (see section 4-5-3).
• Adjust the scan start position (see section 4-5-3).
• Adjust the CCD waveform flatness (see section 4-5-3).
• Check the LED array; replace it if it is defective.
• Adjust the scan line position and/or scan start position
(see section 4-5-3).
5-1
Remedies