Process Section - Sharp AR-5618 Service Manual

：'11/Jul/22
1

12.Process section

No.
A Drum unit
B Main charger unit
C Cleaning blade
A.Drum unit
When removing the drum, put the drum unit upside down to prevent
waste toner from spilling.
(1)
When the drum is replaced, be sure to replace the drum positioning boss
with a new one, too.
1
(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 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 following
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.
Contents
(2)
AR-5618S DISASSEMBLY AND ASSEMBLY 10-16
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.
B. Main charger unit
(1)
C. Cleaning blade
(1)
(2)
1