MX-M264U DISASSEMBLY AND ASSEMBLY 10 – 2
1. Process unit
Note for servicing the OPC drums
1. Prevention of oily dirt attachment
Note
• Be careful not to attach fingerprints or oily dirt on the OPC drum
surface. (Keep the unit away from oils and dust.)
• When replacing the OPC drum, cover the OPC drum with the
protection sheet and hold the protection sheet.
If it is required to hold the OPC drum directly, use enough care
not to touch the cleaning blade area, 5mm inside from both
edges of the OPC drum. (If a fingerprint or oily dirt is attached to
the cleaning blade area of the OPC drum, the cleaning blade
may flip.)
Countermeasures
If a fingerprint is attached to the OPC drum surface erroneously,
perform the following countermeasures.
1)
Use dry cloth to clean and remove the dirt.
2)
Apply Kynar powder to prevent blade flip.
Check method
Check to confirm that the OPC drum is free from fingerprints or oily
dirt and that the cleaning blade is completely cleaned by the follow-
ing method.
• Make a print of a half tone image on all the surface of A4 (11" x
8.5") paper, and check the printed paper for any abnormality in
the image.
2. Prior exposure prevention
Note
• Avoid servicing in a place where there is strong light.
• Do not expose the unit to light for a long time.
• Cover the OPC drum with light-blocking material. (When using
paper, use about 10 sheets of paper to block light.)
Countermeasures
If the OPC drum is erroneously exposed to light too much (prior
exposure), perform the following countermeasures.
1)
Print half tone images on the whole surface of A4 (11" x 8.5")
paper, and check to confirm that there is no irregular density
area in the previously exposed section.
2)
Damages due to prior exposure may be recovered by keeping
the OPC drum for several hours. If, however, image are not
recovered, replace the OPC drum.
A. Drum
CAUTION: When installing the process unit in the main unit after
replacing the drum, process unit may not be able to
install by reason of the drum drive coupling position.
In this case, rotate the drum about 45 degrees and
install again.
B. Drum section
(1) Main charger
(2) Cleaning blade
5mm
5mm
2
1
4
3
1
2
4
3
1
1
2