DOWNLOAD Sharp MX-6500N / MX-7500N (serv.man24) Service Manual ↓ Size: 46.9 MB | Pages: 76 in PDF or view online for FREE

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 57

1)

Remove the MC unit.

2)

Remove the drum.

3)

Remove the screw, and remove the MC cover.

4)

Remove the DL unit, and disconnect the connector from the
DL unit.

CAUTION: When installing, check to confirm that the hook of the

DL unit is securely engaged with the positioning boss.

CAUTION: Arrange the harness as shown below.

1) Bend the harness as shown below.

When attaching the cover, refer to the figure below.

5)

Remove the screw, hold the projection of the cleaner blade,
and remove it.

1)

Remove the MC unit.

2)

Remove the drum.

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 58

3)

Remove the light shielding sheet and the harness cover.

CAUTION: When attaching the light shielding sheet, attach it to the

attachment reference.

CAUTION: When the side seals F and R and the toner reception

sheet are replaced, this procedure is not required.

4)

Remove the screw, and remove the TCDL unit. Disconnect the
connector from the TCDL unit.

CAUTION: When the side seals F and R and the toner reception

sheet are replaced, this procedure is not required.

5)

Check the toner reception sheet.

CAUTION: When replacing the toner reception sheet, attach it to

the attachment reference of the toner reception cover.

CAUTION: When replacing the toner reception sheet, it is not

required to remove the toner reception cover.

6)

Check the side seals F/R.

CAUTION: When replacing the side seals F and R, it is not required

to remove the toner reception cover.

CAUTION: When there is a clearance in the edge section of the

side seals after replacing the blade and when the side
seal is replaced, attach the seal to the attachment refer-
ence.

Also attach so that the rubber section of the cleaner
blade does not interfere with the side seal when the rub-
ber section is pushed in.

Be careful not to crush the toner reception sheet. Especially
when the side seals are replaced without changing the toner
reception sheet, turn over the toner reception sheet and attach
the seals as shown in the figure below.

Difference-in-level reference

0mm

0.5mm

Diff

erence-in-le

ve

l ref

e

rence

0mm

0.5mm

Diff

erence-in-le

v

el 

ref

erence

0mm

0.5mm

Difference-in-level reference

0mm 0.5mm

* When attaching the side moltopren, attach it by pushing 

it onto the side of the toner reception cover. 

Sample of attachment

Side seal F PO

Side seal R PO

Toner reception 
cover edge reference
   +0
   +0.2mm
(Attach along it.)

㽲

㽳

Blade edge reference
    +0mm
    +0.2mm

Blade edge reference

    +0mm
    +0.2mm

Toner reception 
cover edge reference
   +0
   +0.2mm
(Attach along it.)

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 59

1)

Remove the MC unit.

2)

Remove the drum.

3)

Remove the side seals R.

4)

Remove the screw, and remove the plate and the gear.

5)

Remove the screw, and remove the cleaning brush.

6)

Remove the coupling and the bearing from the cleaning brush.

NOTE: Be careful not to leave fingerprints or oily dirt on the OPC

drum surface. (Keep the unit away from oils and dust.)

NOTE: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.)

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 stearic acid powder to prevent blade flip.

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

NOTE: Avoid servicing in a place where there is strong light.

NOTE: Do not expose the unit to light for a long time.

NOTE: Cover the OPC drum with light-blocking material. (When

using paper, use about 10 sheets of paper to block light.)

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)

If the OPC drum is subject to stress by being exposed to
strong light, it may be recovered by leaving it in a dark and cool
place.

If it does not be recovered, replace it with a new one.

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 60

1)

Remove the screw, and remove the holder. Remove the sepa-
ration pawl and the spring from the holder.

CAUTION: When removing and installing, be careful not to scratch

the transfer belt with the separation pawl.

1)

Remove the screw, rotate the primary transfer cleaner unit and
remove it.

2)

Remove the screw, and remove the primary transfer toner
reception seal.

1)

Remove the primary transfer cleaner unit.

2)

Remove the primary transfer cleaner seal F/R.

CAUTION: When replacing the primary transfer cleaner seals F/R,

attach them to the attachment reference.

3)

Remove the screw, and remove the primary transfer cleaner
blade.

0mm

0.5mm

0mm

0.5mm

0mm

0.5mm

0mm

0.5mm

Edge ref

erence

Edge ref

erence

Edge reference

Edge reference