Sharp MX-M623U / MX-M753U (serv.man10) Service Manual ▷ View online
MX-M753N NOTE FOR SERVICING - ii
4)
Place of direct sunlight.
Plastic parts and ink may be deformed, discolored, or may
undergo qualitative change.
It may cause a breakdown or copy dirt.
Plastic parts and ink may be deformed, discolored, or may
undergo qualitative change.
It may cause a breakdown or copy dirt.
5)
Place which is full of organic gases such as ammonium
The organic photo-conductor (OPC) drum used in the machine
may undergo qualitative change due to organic gases such as
ammonium.
Installation of this machine near a diazo-type copier may result
in dirt copy.
The organic photo-conductor (OPC) drum used in the machine
may undergo qualitative change due to organic gases such as
ammonium.
Installation of this machine near a diazo-type copier may result
in dirt copy.
6)
Place of much dust
When dusts enter the machine, it may cause a breakdown or
copy dirt.
When dusts enter the machine, it may cause a breakdown or
copy dirt.
7)
Place near a wall
Some machine require intake and exhaust of air.
If intake and exhaust of air are not properly performed, copy
dirt or a breakdown may be resulted.
Some machine require intake and exhaust of air.
If intake and exhaust of air are not properly performed, copy
dirt or a breakdown may be resulted.
8)
Unstable or slant surface
If the machine drops or fall down, it may cause an injury or a
breakdown.
If there are optional paper desk and the copier desk specified,
it is recommendable to use them.
When using the optional desk, be sure to fix the adjuster and
lock the casters.
If the machine drops or fall down, it may cause an injury or a
breakdown.
If there are optional paper desk and the copier desk specified,
it is recommendable to use them.
When using the optional desk, be sure to fix the adjuster and
lock the casters.
4. Note for handling PWB and electronic
parts
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)
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.
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
(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.
17-23/32"
(45cm)
(45cm)
11-13/16"
(30cm)
(30cm)
11-13/16"
(30cm)
(30cm)
MX-M753N NOTE FOR SERVICING - iii
5. Note for repairing/replacing the LSU
When repairing or replacing, be sure to observe the following
items.
1)
items.
1)
When repairing or replacing the LSU, be sure to disconnect
the power plug from the power outlet.
the power plug from the power outlet.
2)
When repairing or replacing the LSU, follow the procedures
described in this Service Manual.
described in this Service Manual.
3)
When checking the operations after repairing the LSU, keep all
the parts including the cover installed and perform the opera-
tion check.
the parts including the cover installed and perform the opera-
tion check.
4)
Do not modify the LSU.
5)
When visually checking the inside of the machine for the oper-
ation check, be careful not to allow laser beams to enter the
eyes.
ation check, be careful not to allow laser beams to enter the
eyes.
If the above precaution is neglected or an undesignated work is
performed, safety may not be assured.
performed, safety may not be assured.
6. Note for handling the drum unit, the
transfer unit, the developing unit, and the
fusing unit
fusing unit
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)
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.
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.)
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.
eign material on the OPC drum surface.
(Transfer unit)
1)
1)
Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the transfer roller.
eign material on the transfer roller.
(Developing unit)
1)
1)
Be careful not to attach fingerprints, oil, grease, or other for-
eign material on the developing unit.
eign material on the developing unit.
(Fusing unit)
1)
1)
Be careful not to put fingerprints, oil, grease, or other foreign
material on the fusing roller and the external heating belt.
material on the fusing roller and the external heating belt.
2)
Do not leave the fusing roller in contact state for a long time.
7. Screw tightening torque
The screws used in this machine are largely classified into three
kinds.
These kinds are classified according to the shape of the screw
grooves and use positions.
The table below shows the kinds of the screws and the tightening
torques depending on the use position.
When tightening the screws for repair or maintenance, refer to the
table.
However, for the other conditions of tightening screws than speci-
fied on this table, or when a special care is required, the details are
described on the separate page. Refer to the descriptions on such
a case.
kinds.
These kinds are classified according to the shape of the screw
grooves and use positions.
The table below shows the kinds of the screws and the tightening
torques depending on the use position.
When tightening the screws for repair or maintenance, refer to the
table.
However, for the other conditions of tightening screws than speci-
fied on this table, or when a special care is required, the details are
described on the separate page. Refer to the descriptions on such
a case.
NOTE: Especially for the screw fixing positions where there is an
electrode or a current flows, use enough care to tighten
securely to avoid loosening.
securely to avoid loosening.
Screw kinds and tightening torques
Normal screws, set screws (including step screws)
Tapping screws (for iron)
Tapping screw (for plastic)
Screw
diameter
Material to be
fixed
Tightening
torque
(N
m)
Tightening
torque
(kgf
cm)
Tightening
torque
(lbft)
M2.6
Steel plate
0.8 - 1.0
8 - 10
0.6 - 0.7
M3
Steel plate
1.0 - 1.2
10 - 12
0.7 - 0.9
M4
Steel plate
1.6 - 1.8
16 - 18
1.2 - 1.3
Screw
diameter
Material to be
fixed
Tightening
torque
(N
m)
Tightening
torque
(kgf
cm)
Tightening
torque
(lbft)
M3
Steel plate
(Plate thickness
0.8mm or above)
1.0 - 1.2
10 - 12
0.7 - 0.9
M4
Steel plate
(Plate thickness
0.8mm or above)
1.6 - 1.8
16 - 18
1.2 - 1.3
M3
Steel plate
(Plate thickness
less than 0.8mm)
0.6 - 0.8
6 - 8
0.4 - 0.6
M4
Steel plate
(Plate thickness
less than 0.8mm)
1.2 - 1.4
12 - 14
0.9 - 1.0
Screw
diameter
Material to be
fixed
Tightening
torque
(N
m)
Tightening
torque
(kgf
cm)
Tightening
torque
(lbft)
M3
Plastic resin
0.6 - 0.8
6 - 8
0.4 - 0.6
M4
Plastic resin
1.0 - 1.2
10 - 12
0.7 - 0.9
MX-M753N PRODUCT OUTLINE 1 – 1
MX-M753N
Service Manual
[1] PRODUCT OUTLINE
1. System configuration
2. Machine configuration
STD: Standard provision. OPT: Option
OPT*1: Product key target.
OPT*1: Product key target.
MX-M623N/M753N
MX-M623U/M753U
Copier
STD
STD
PCL printer
STD
OPT*
1
PS printer
OPT*
1
OPT*
1
Main body LCD
COLOR WVGA 8.5"
COLOR WVGA 8.5"
FAX
OPT
OPT
Scanner
STD
OPT*
1
Filing (Print hold function)
STD
STD
HDD
STD
STD
DSPF
STD
STD
Automatic duplex
STD
STD
Security
OPT*
1
OPT*
1
Internet Fax
OPT*
1
OPT*
1
MX-FN16
SADDLE STITCH FINISHER
SF-SC11
STAPLE CARTRIDGE
AR-SC3
STAPLE CARTRIDGE
AR-PN4A/B/C/D
PUNCH MODULE
MX-PN10A/B/C/D
PUNCH MODULE
MX-SC10
STAPLE CARTRIDGE
MX-FN15
FINISHER
MX-FN14
FINISHER
MX-CF10
INSERTER
MX-LC10
LARGE CAPACITY TRAY
MX-LCX3N
LARGE CAPACITY TRAY
MX-M623N/M753N
MX-M623U/M753U
MX-M623U/M753U
DIGITAL MULTIFUNCTIONAL
SYSTEM
SYSTEM
MX-M753N PRODUCT OUTLINE 1 – 2
3. Combination of options
STD: Standard provision. : Installable. *1: The printer expansion kit is required. *2: No support for some destinations.
*3: The SharpOSA Utility CD-ROM is not provided. *4: Standard for North America.
*3: The SharpOSA Utility CD-ROM is not provided. *4: Standard for North America.
Section
Name
Model name
MX-M623N
MX-M753N
MX-M753N
MX-M623U
MX-M753U
MX-M753U
Product
key target
Remarks
Paper feed
system
system
LARGE CAPACITY TRAY
MX-LC10
LARGE CAPACITY TRAY
MX-LCX3N
Paper exit
system
system
INSERTER
MX-CF10
FINISHER
MX-FN15
SADDLE STITCH FINISHER
MX-FN16
FINISHER
MX-FN14
100 sheets staple
PUNCH MODULE
AR-PN4A/B/C/D
For finisher and saddle stitch
finisher
finisher
PUNCH MODULE
MX-PN10A/B/C/D
For 100 sheets staple finisher
STAPLE CARTRIDGE
SF-SC11
For Finisher and
Saddle Finisher
Saddle Finisher
STAPLE CARTRIDGE
AR-SC3
For saddle
STAPLE CARTRIDGE
MX-SC10
For 100 sheets staple finisher
Printer
expansion
expansion
PRINTER EXPANSION KIT
MX-PB13
STD
PS3 EXPANSION KIT
MX-PKX1
XPS EXPANSION KIT
MX-PUX1
*
1
The expansion memory board
is required.
is required.
EXPANSION MEMORY BOARD
MX-SMX3
1GB
Required when the XPS
expansion kit is used.
Required when the XPS
expansion kit is used.
BARCODE FONT KIT
AR-PF1
Image send
expansion
expansion
FACSIMILE EXPANSION KIT
MX-FXX2
*
2
*
2
STAMP UNIT
AR-SU1
*
2
*
2
STAMP CARTRIDGE
AR-SV1
*
2
*
2
INTERNET FAX EXPANSION KIT
MX-FWX1
NETWORK SCANNER EXPANSION KIT
MX-NSX1
STD
ENHANCED COMPRESSION KIT
MX-EBX3
Authentication/
Security
Security
DATA SECURITY KIT
MX-FR22U
Commercial version
DATA SECURITY KIT
MX-FR22
Authentication version
Application/
Solution
Solution
SHARPDESK 1 LICENSE KIT
MX-USX1
SHARPDESK 5 LICENSE KIT
MX-USX5
SHARPDESK 10 LICENSE KIT
MX-US10
SHARPDESK 50 LICENSE KIT
MX-US50
SHARPDESK 100 LICENSE KIT
MX-USA0
APPLICATION INTEGRATION MODULE
MX-AMX1
APPLICATION COMMUNICATION MODULE
MX-AMX2
STD*
3
/
EXTERNAL ACCOUNT MODULE
MX-AMX3
STD*
3
/
KEYBOARD
MX-KBX2
STD/*
4
