Panasonic UF-490 Service Manual page 96

4.4.16. Scanned Copy Quality Problems
Are there any foreign particles
or paper pieces in the scanning
area?
Is the scanning area dirty?
Are the Transmitting
Rollers dirty?
Is the CIS Assembly abnormal?
START
Yes
No
Yes
No
Yes
No
No
END
Remove the foreign particles or paper
pieces from the scanning area.
Clean the Scanning Glass (Sect. 2.2.2).
Clean the rollers (Sect. 2.2.2).
Yes
1. Check CN3 (SC PCB).
2. Check Connector (CIS).
3. Replace the CIS Assembly
(Sect.2.2.5)
4. Replace the SC PCB (Sect.2.2.4)
96