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 – 53

1)

Clean the transport roller 13.

1)

Clean the transport roller 17.

1)

Clean the registration roller (Drive) and the registration roller
(Idle).

1)

Clean the CSI side “slant line marked area” with dry cloth.

1)

Open the front cover.

2)

Insert the LSU cleaning rod into the LSU cleaning hole with the
cleaning base faced downward, and clean the dust-proof
glass.

1)

Open the front cover.

2)

Remove the LSU cleaning rod from the front cover.

3)

Remove the cleaning base from the lead edge of the LSU
cleaning rod.

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 54

CAUTION: Always keep the DV unit with developer in it horizontal

when handling.

Since this unit employs the developer refresh method, if
the DV unit is tilted, developer may fall into the waste
toner transport section because of its structure.

1)

Remove the screw, and remove the DV cover.

[Note for attaching the DV cover]

When attaching the DV cover, be careful of the following items:

1. Insert the convex portion in the angle shown below.

2. Turn the cover to attach.

3. Check to confirm that three convex portions are securely

engaged.

2)

Discharge old developer from the DV unit.

CAUTION: When discharging developer, rotate the coupling pulley

in the rear side of the DV unit in the arrow direction
while the operation.

3)

Check the Upper DV Blade.

CAUTION: When replacing the upper DV blade, attach it to the

attachment reference.

CAUTION: After attaching the upper DV blade, check it for any

deformation or wavering.

4)

Supply new developer into the DV unit.

CAUTION: When supplying developer, rotate the coupling pulley in

the rear side of the DV unit in the arrow direction while
the operation.

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MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 55

1)

Remove the screw, and remove the DV doctor cover.

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

DV doctor cover is securely engaged with the position-
ing boss.

2)

Check the DV blade.

CAUTION: When replacing the DV blade, attach it to the attach-

ment reference.

CAUTION: After attaching the DV blade, check the DV blade for

any deformation or wavering.

3)

Check the Doctor side seal.

CAUTION: When replacing the Doctor side seal, attach it to the

attachment reference.

CAUTION: After attaching the Doctor side seal, check it for any

deformation or wavering.

1)

Check the DV side seals F/R.

CAUTION: When replacing the DV side seals F/R, attach them to

the attachment references.

CAUTION: When attaching the DV side seals F/R, be careful not to

cover the DV blade with the DV side seals.

1)

Remove the screw, and remove the filter cover. Remove the fil-
ter holder.

CAUTION: When attaching the filter cover, do not rotate but attach

straight from the top. (See the figure below.)

Wall surface reference

0.3mm

0mm

Rib ref

erence

0.5mm

0mm

MM

MM

MM

MM

2

IB

EF

ER

ENC

E

MM

MM

2

IB

ER

ENC
E

MM

MM

0.3mm

0mm

Edge ref

erence

0.3mm

0mm

0.3mm

0mm

Edge ref

erence

0.3mm

0mm

DV BOX edge 

reference

Mark-off line 

inside reference

MX-7500N  DISASSEMBLY AND ASSEMBLY  10 – 56

1)

Release the lock, and remove the drum.

CAUTION: Since the drum has directional property, be careful not

to mistake the installing direction when installing.

"F" mark is put on the drum front side.

CAUTION: When the OPC drum is removed, perform the following

procedures.

1)

After removing the OPC drum, apply stearic acid powder
(UKOG-0312FCZZ) to the whole surface of the OPC drum.

2)

After attaching the OPC drum to the OPC drum frame, use the
black protect sheet or copy paper, and manually rotate the
OPC drum two turns in the forward direction to remove stearic
acid powder applied to the OPC drum surface.

NOTE: Do not touch the OPC drum surface except for the both

ends (5mm) of the OPC drum.

NOTE: Any section of the OPC drum may be touched from above

the black protect sheet, but do not touch too strongly.

1)

Remove the drum.

2)

Remove the screw, and remove the MC unit.

* When removing the MC unit only, there is no need to remove

the drum.

OK

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