DOWNLOAD Sharp MX-M623U / MX-M753U (serv.man7) Service Manual ↓ Size: 13.53 MB | Pages: 104 in PDF or view online for FREE

MX-M753N  MX-M623N/M623U/M753N/M753U  1 – 2

If dust enters the machine, it may cause dirty copy and a paper
jam, resulting in a shortened lifetime.

If the machine is installed under the rays of the sun, the exterior of
the machine may be discolored and abnormal copies may be pro-
duced.

Do not install the machine at a place where there are gases and
chemicals. Especially be careful to avoid installation near a diazo-
type copier, which produces ammonium gas.
Copy quality may be adversely affected and a trouble may be
caused.

Avoid installation near a machine which produces vibrations.
If vibrations are applied to the copier machine, copy images may be
deflected and a trouble may be caused.

When handling the PWB and the electronic parts, be sure to
observe the following precautions in order to prevent against dam-
age by static electricity.
1)

When in transit or storing, put the parts in an anti-static bag or
an anti-static case and do not touch them with bare hands.

2)

When and after removing the parts from an anti-static bag
(case), use an earth band as shown below:
• Put an earth band to your arm, and connect it to the

machine.

• When repairing or replacing an electronic part, perform the

procedure on an anti-static mat.

MX-M753N  MX-M623N/M623U/M753N/M753U  1 – 3

When handling the OPC drum unit, the transfer unit, and the devel-
oping unit, strictly observe the following items.
If these items are neglected, a trouble may be generated in the
copy and print image quality.
(Drum unit)
1)

Avoid working at a place with strong lights.

2)

Do not expose the OPC drum to lights including interior lights
for a long time.

3)

When the OPC drum is removed from the machine, cover it
with light blocking material. (When using paper, use about 10
sheets of paper to cover it.)

4)

Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the OPC drum surface.

(Transfer unit)
1)

Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the transfer roller.

(Developing unit)
1)

Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the developing unit.

(Fusing unit)
1)

Be careful not to put fingerprints, oil, grease, or other foreign
material on the fusing roller and the external heating belt.

2)

Do not leave the fusing roller in contact state for a long time.

It is recommended to use a forklift for bringing in the machine for
safety.
If no forklift is available, man-power of two persons is required. The
machine is considerably heavy, and requires safety precautions for
delivery and installation.
Transit of the machine must be made in packed condition to the
installing place.
Since the hard disk drive is built in the machine, use care not to
exert vibrations or shocks to the machine when in transit.

Remove the packing materials prior to installation in the office envi-
ronment.

1)

Remove the PP band.

2)

Remove the top case.

3)

Remove the top pads.

4)

Remove the adjuster cover and the screw (in the bag) from the
top pad L.

5)

Lift the machine slightly, and remove the bottom pad L.

6)

Lift the machine slightly, and remove the bottom pad R.

1

Implements, facility, 
and man power

Use a forklift. (If no forklift is available, 
manpower of two persons is required.) 

2

Delivery

Transit must be made in packed condition.

MX-M753N  MX-M623N/M623U/M753N/M753U  1 – 4

7)

Remove the slope.

* Slope: Parts

8)

Attach the slope to the concave section of the skid.

9)

Hold the machine grips and push them down in the arrow
direction.

NOTE: This machine includes a hard disk drive, which must be

protected against vibrations and shocks. 
Never move the machine with the power ON.

NOTE: When the machine is moved over a bump, hold the grip on

the right side of the machine to lift and cross the bump
over. This is because the casters may be broken for a big
bump.

1)

Check that all the parts are in the package.

Skid slope

DKiT-0367FCZZ

1

Adjuster cover

x 1

2

Adjuster cover fixing screw

x 3

3

Operation manual storage cover

x 1

4

Driver (CD-ROM)

x 1

5

Operation manual

x 1

6

Delivery and installation report

x 1

1

2

3

4

5

6

MX-M753N  MX-M623N/M623U/M753N/M753U  1 – 5

1)

Move the main unit to the installing position, and turn the
adjuster to fix the main unit.

2)

Remove the bottom tray from the main unit.

3)

Install the adjuster cover to the main unit.

4)

Insert the bottom tray into the main unit.

Remove the No. 2/3 mirror base fixing screw and the label of note
for unpacking on the left side.

Remove the paper feed tray rotation plate fixing screw and the
label of note for tray.
[Tray 1, Tray 2]

[Tray 3, Tray 4]

1

No. 2/3 mirror base lock screw

2

Tray rotation plate fixing material