Sharp MX-M623N User manual

INSTALLATION MANUAL
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
CONFIGURATION
[1] MX-M623N/M623U/
M753N/M753U . . . . . . . . . . . . . . . . . 1-1
[2] MX-LC10 . . . . . . . . . . . . . . . . . . . . . 2-1
[3] MX-LCX3N . . . . . . . . . . . . . . . . . . . . 3-1
[4] MX-CF10 . . . . . . . . . . . . . . . . . . . . . 4-1
[5] MX-FN15/FN16 . . . . . . . . . . . . . . . . 5-1
[6] AR-PN4 . . . . . . . . . . . . . . . . . . . . . . 6-1
[7] MX-FN14 . . . . . . . . . . . . . . . . . . . . . 7-1
[8] MX-PN10 . . . . . . . . . . . . . . . . . . . . . 8-1
[9] MX-FXX2 . . . . . . . . . . . . . . . . . . . . . 9-1
[10] MX-FWX1. . . . . . . . . . . . . . . . . . . . 10-1
[11] MX-KBX2 . . . . . . . . . . . . . . . . . . . . 11-1
[12] AR-SU1 . . . . . . . . . . . . . . . . . . . . . 12-1
[13] MX-EBX3 . . . . . . . . . . . . . . . . . . . . 13-1
[14] MX-FR22U . . . . . . . . . . . . . . . . . . . 14-1
[15] MX-PB13 . . . . . . . . . . . . . . . . . . . . 15-1
[16] MX-PKX1 . . . . . . . . . . . . . . . . . . . . 16-1
[17] MX-PUX1 . . . . . . . . . . . . . . . . . . . . 17-1
[18] MX-SMX3. . . . . . . . . . . . . . . . . . . . 18-1
[19] AR-PF1 . . . . . . . . . . . . . . . . . . . . . 19-1
[20] MX-NSX1 . . . . . . . . . . . . . . . . . . . . 20-1
[21] MX-AMX1. . . . . . . . . . . . . . . . . . . . 21-1
[22] MX-AMX2. . . . . . . . . . . . . . . . . . . . 22-1
[23] MX-AMX3. . . . . . . . . . . . . . . . . . . . 23-1
[24] DRY HEATER INSTALLATION . . . 24-1
CONTENTS
CODE: 00ZMXM753/I1E
DIGITAL MULTIFUNCTIONAL SYSTEM
MX-M623N
MX-M623U
MX-M753N
MX-M753U
MODEL

CONTENTS
CONFIGURATION
1. Main unit and option . . . . . . . . . . . . . . . . . . . . . . .. . . . . . i
2. Main unit configuration . . . . . . . . . . . . . . . . . . . . .. . . . . . i
3. Combination of options . . . . . . . . . . . . . . . . . . . . .. . . . . . ii
[1] MX-M623N/M623U/M753N/M753U
1. Installing (use) conditions . . . . . . . . . . . . . . . . . . . 1- 1
2. Transit and delivery. . . . . . . . . . . . . . . . . . . . . . . . 1- 3
3. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 3
4. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 5
[2] MX-LC10
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 2
[3] MX-LCX3N
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 1
[4] MX-CF10
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4- 2
[5] MX-FN15/FN16
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 4
3. Note for packing . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 7
[6] AR-PN4
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6- 1
[7] MX-FN14
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7- 2
[8] MX-PN10
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8- 1
[9] MX-FXX2
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9- 1
[10] MX-FWX1
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10- 1
[11] MX-KBX2
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11- 1
[12] AR-SU1
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12- 1
[13] MX-EBX3
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13- 1
[14] MX-FR22U
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14- 1
[15] MX-PB13
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15- 1
[16] MX-PKX1
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16- 1
[17] MX-PUX1
1. Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17- 1
2. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17- 1
[18] MX-SMX3
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18- 1
[19] AR-PF1
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19- 1
[20] MX-NSX1
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20- 1
[21] MX-AMX1
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21- 1
[22] MX-AMX2
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22- 1
[23] MX-AMX3
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23- 1
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23- 1
[24] DRY HEATER INSTALLATION
1. Dry heater switch and dehumidifying heater relay
PWB installation . . . . . . . . . . . . . . . . . . . . . . . . . . 24- 1
2. Scanner dry heater installation . . . . . . . . . . . . . . . 24- 1
3. Dry heater (Paper feed trays 1, 2) installation . . . . 24- 2
4. Dry heater (paper feed trays 3, 4) installation . . . . 24- 3

MX-M753N CONFIGURATION - i
MX-M753N Service Manual
CONFIGURATION
1. Main unit and option
2. Main unit configuration
STD: Standard provision. OPT: Option. 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
DIGITAL MULTIFUNCTIONAL
SYSTEM

MX-M753N CONFIGURATION - ii
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.
Section Name Model name MX-M623N
MX-M753N
MX-M623U
MX-M753U
Product
key target Remarks
Paper feed system LARGE CAPACITY TRAY MX-LC10 {{
LARGE CAPACITY TRAY MX-LCX3N {{
Paper exit 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
PUNCH MODULE MX-PN10A/B/C/D {{ For 100 sheets staple finisher
STAPLE CARTRIDGE SF-SC11 {{ For finisher and saddle stitch
finisher
STAPLE CARTRIDGE AR-SC3 {{ For saddle
STAPLE CARTRIDGE MX-SC10 {{ For 100 sheets staple finisher
Printer expansion PRINTER EXPANSION KIT MX-PB13 STD {{
PS3 EXPANSION KIT MX-PKX1 {{
*1 {
XPS EXPANSION KIT MX-PUX1 {{
*1 {The expansion memory board
is required.
EXPANSION MEMORY BOARD MX-SMX3 {{ 1GB
Required when the XPS
expansion kit is used.
BARCODE FONT KIT AR-PF1 {{
Image send
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
DATA SECURITY KIT MX-FR22U {{{Commercial version
Application/
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 {

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 1
MX-M753N Service Manual
[1] MX-M623N/M623U/M753N/
M753U
1. Installing (use) conditions
Before installing the machine, check that the following installing
(use) conditions are satisfied.
If the installing (use) conditions are not satisfied, the machine may
not display full performances, resulting in troubles. It may also
cause safety problems. Therefore, be sure to arrange the installing
(use) conditions before setting up the machine.
A. Bringing space
For installation of a large size machine, be sure to check that the
door size is wide enough before bringing in.
B. Installing space
The following space must be provided around the machine in order
to assure machine performances and proper operations.
If any option is installed, provide the additional space for installing
it.
Adequate space must be provide behind the machine for proper
ventilation heat and dust. If not, the machine cannot exhibit func-
tions against heat and dust, causing some troubles.
C. Power source (Capacity, voltage, frequency,
safety, plug)
If the power specifications are not satisfied, the machine cannot
exhibit full performances and may cause safety trouble.
Strictly observe the following specifications.
(1) Power capacity
Check that the following power capacity is satisfied. If not, addition-
ally provide a power source.
Current capacity
Japan: 20A or more
100V: 15A or more
200V: 10A or more
NOTE: Check the shape of the power plug of the machine, and
insert it into a power outlet of the acceptable shape.
(2) Power voltage
Measure the voltage during copying to check that the voltage is in
the range of the specified voltage ±10%.
If the voltage is outside the specified range, use thicker lead wires
to reduce impedance.
(An electrical work is required.)
Use of a step-up transformer is also available. In this case, the
capacity must be great enough for the max. power consumption of
the machine.
(3) Power frequency, waveform
The frequency must be within the range of the specified frequency
±2%. If power waveform is deformed, a trouble may occur.
(4) Safety
Be sure to properly ground the machine.
Grounding (earth connection) must be performed before inserting
the power plug into the power outlet.
When disconnecting the earth connection, be sure to disconnect
the power plug from the power outlet in advance.
(5) Power plug
Check the shape of the power plug of the machine, and insert it into
a power outlet of the acceptable shape.
D. Floor strength and level
This machine is considerably heavy and becomes heavier with an
option installed.
The floor must be strong enough for assuring safety.
If the unit is not horizontally installed, the toner density control is not
performed normally, degrading the copy quality.
If not, color shift or image distortion may occur.
E. Direct rays of the sun, dust, temperature,
humidity, gasses, chemicals, vibration
(1) Temperature and humidity
This machine is designed to perform properly under the specified
temperature and humidity. If the temperature and humidity exceeds
the specified range, the machine may not operate properly and or
cause equipment failure.
Especially when the humidity is too high, paper absorbs humidity to
cause a paper jam or dirty copy.
Do not install the machine near a heater, a cooler, or a humidifier.
Dew may be formed inside the machine to cause a trouble. Use
enough care for ventilation.
• Working environment
Temperature: 10 to 35°C
Humidity: 20 to 85% RH
Atmospheric pressure: 590 to 1013hPa (altitude: 0 to 2000 m)
No. Content
1 Bringing space
2 Installing space
3 Power source (Capacity, fluctuation, safety)
4 Floor strength
5 Direct rays of the sun, dust, temperature, humidity, gases,
chemicals
17-23/32"
(45cm)
11-13/16"
(30cm)
11-13/16"
(30cm)
85%
Humidity㧔RH㧕
60%
20%

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 2
(2) Dust
If dust enters the machine, it may cause dirty copy and a paper
jam, resulting in a shortened lifetime.
(3) Direct rays of the sun
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.
(4) Gases and chemicals
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.
(5) Vibration
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.
F. 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) 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
G. Note for handling the drum unit, the transfer
unit, the developing unit, and the 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) 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.
2. Transit and delivery
A. Implements, facility, and manpower
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.
B. Delivery
Remove the packing materials prior to installation in the office envi-
ronment.
3. Unpacking
A. Unpacking procedure
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.
No. Content Method
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.
B. Removal of the fixing tape, protection material
and parts packed together
C. Check the parts packed together
1) Check that all the parts are in the package.
Part name Part code
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
123
456

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 5
4. Installation
A. Adjuster cover installation
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.
B. Lock release
(1) No. 2/3 mirror base lock release
Remove the No. 2/3 mirror base fixing screw and the label of note
for unpacking on the left side.
(2) Tray rotation release plate lock release
Remove the paper feed tray rotation plate fixing screw and the
label of note for tray.
[Tray 1, Tray 2]
[Tray 3, Tray 4]
Lock position
1 No. 2/3 mirror base lock screw
2 Tray rotation plate fixing material

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 6
C. Press the fusing section (upper and lower heat
rollers) and remove the process separation
pawl fixing block.
1) Pull the knob on the left door to pull out the left door.
2) Turn the pressing screw in the fusing section as shown in the
figure below (fully loosen them) to press the heat rollers
together.
3) Remove the separation pawl fixing block from the process unit.
4) Replace the left door.
D. Set developer
(1) Supply developer
1) Open the front cabinet.
2) Loosen the blue screw of the process cover, and tilt down the
process cover toward you.
3) Loosen the blue screw which is fixing the developing unit.
4) While pressing the developing unit lock lever, pull out the
developing unit.
Hold the strap of the developing unit and remove the develop-
ing unit.
5) Remove the screws and remove the DV cover.
2
1
2
1

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 7
6) While supplying developer to the developer supply port of the
developing unit, turn the MG gear clockwise with a plus screw-
driver to supply all developer to the developing unit.
NOTE: When supplying developer, do not touch the MG roller with
bare hands.
7) Install the DV cover to the developing unit.
8) Insert the developing unit to the main unit and fix it with the
blue screw.
9) Close the process cover and fix it with the blue screw.
(2) Toner set
1) Remove the toner cartridge from the box, and shake it several
times horizontally.
NOTE: Be sure to shake the toner cartridge horizontally.
NOTE: Be careful not rotate as shown in the figure below.
2) Insert the toner cartridge into the main unit insertion port as
shown below. In this case, do not turn the cartridge.
3) Insert the toner cartridge until it is locked.
(3) Set the toner density reference control level
Insert the power plug into the power outlet. With the front cabinet
open, turn on the power switch of the main unit.
1) Enter the SIM 25-2 mode.
2) Close the front cabinet.
3) Press [EXECUTE] key to execute the simulation. Toner is
stirred for 3 minutes. The average level of the sensor detection
level is set (stored) as the reference toner density control
value.
E. Paper size change
(1) Tray 3 or tray 4 paper size change
1) Pull out the tray 3 or the tray 4.
2) Hold and slide the fixing knob (slide system) of the partition
plates A and B to fit with the size of paper to be supplied.
3) Supply paper into the tray.
4) Push the tray.
NOTE: Note that a certain special paper cannot be used for tray 4.
To use special paper, use tray 3.
(2) Tab paper setting
To use tab paper, install the exclusive-use guide tray 3.
Note that tray 4 cannot be used.
1) Remove the exclusive-use guide from the storage position left
inside of the machine.

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 8
2) Pull out tray 3.
3) Slide the partition plate to tab paper as shown in the figure
below and install it so that it covers the partition plate.
4) Supply tab paper with the print face up into tray 3.
5) Push in tray 3.
(3) Changing the tray settings
When you change the paper in a tray, the tray settings in the sys-
tem settings must also be changed.
1) Press the [SYSTEM SETTINGS] key.
2) Configure the tray settings in the touch panel.
Touch the [Paper Tray Settings] key.
3) Touch the [Tray Settings] key.
4) Touch the [Change] key in “Tray 1”.
5) Select [Recycled] from the “Type” select box.
6) Make sure that [Auto-Inch] is selected in the “Size” select box.
7) Touch the [OK] key.
The above steps change the paper settings for tray 1 to 8-1/2”
x 11” recycled paper.
F. Other parts setting
(1) Operation manual storage cover installation
1) Install the operation manual storage cover to the rear cabinet.
(2) Other notes
Check to insure that the cable connected to the service terminal (A
in the figure below) is 3m or less.
SYSTEM
SETTINGS
Ad
m
i
nP
ass
w
o
r
d
E
x
it
Tota
l
Count
Paper Tray
Sett
i
ngs
p
Pr
i
nter Cond
i
t
i
on
Settin
g
sDocument Filin
g
C
ontro
l
A
dd
ress Contro
l
Fa
x
Data
R
eceive/Forward
U
SB-Device Check
D
efault Settin
g
sL
ist
Pr
i
n
t
(
User
)
System Settings
System Settings
Paper Tray Settings
B
ac
k
T
ray Settings
P
a
p
er T
yp
eRe
g
istration
Auto Tra
y
Switchin
g
C
ustom S
i
ze Reg
i
strat
i
on (Bypass)
Back
Change
Fixed Paper Side Disable Duplex Disable Staple Disable Punch
Type
Paper Property
Feeding Approved Job
Plain
8-1/2x14
Tray Settings
Size
Tray 1
Copy Print Fax I-Fax Doc. Filing
O
K
C
ancel
System Settings
Tray Settings
T
ra
y
:
T
ype:
Si
ze:
Paper Property:
Tra
y1
Recyc
l
e
d
8-1
/
2x11
Print
Copy
I-Fax
Fax
216x330(8 1/2x13)
A
3
,
A4
,
A4R
,
B4
,
B5
,
B5R
,
(A)

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 9
G. Cleaning
(1) Main charger
1) Reciprocate the MC cleaner shaft back and forth to clean the
electrode tip.
H. Specifications setup
Used to set the specifications with SIM26 according to the cus-
tomer's request.
To customize the following items after completion of the destination
setup, change the set values.
I. Image quality check
(1) Copy density and gradation check
NOTE: Before checking the copy density and gradation, be sure to
execute the following jobs.
* Execute the high density image correction (Process correction)
forcibly. (SIM 44-6)
* Execute the half-tone image correction forcibly. (SIM 44-26)
(Method)
Make a copy of the gray test chart (UKOG-0162FCZZ), and check
that it is proper.
Note for checking the copy mode density
To check the density, use the gray test chart (UKOG-0162FCZZ).
Set the copy density level to “Manual 3” in the Text/Printed Photo
mode (Manual).
In addition, all the picture quality adjustment settings in the user
adjustment mode must be set to the default (center).
[Check with the gray test chart (UKOG-0162FCZZ)]
In the copy density check with the gray test chart, check to insure
the following conditions.
[Check with the servicing color test chart (UKOG-0317FCZZ/
UKOG-0317FC11 or UKOG-0326FCZZ/UKOG-0326FC11)]
Check to confirm that it is in the conditions shown below.
(2) Printer density and gradation check
If no printer option is installed to the U model, the following proce-
dures are not required. (SIM64-5 does not operate.)
NOTE: Before checking the printer density and gradation, be sure
to execute the following jobs.
* Execute the high density image correction (Process correction)
forcibly. (SIM 44-6)
* Execute the half-tone image correction forcibly. (SIM 44-26)
(Method 1)
Execute SIM 64-5 to print the print test pattern.
Set each set value to the default and press [EXECUTE] key. The
print test pattern is printed.
The print density must be changed gradually from the lighter level
to the darker level. The density changing direction must not be
reversed.
SIM No Content
26 6 Used to set the destination.
SIM No Content
26 2 LCC paper size setting
3 Used to set the auditor specification mode.
5 Used to set the count mode of the total counter and the
maintenance counter.
18 Used to set YES/NO of the toner save mode
(Only in UK and Japan versions)
* For other destination versions, this setup is made by
the user program.
52 Used to set YES/NO of counting when non-print paper
is passed through each counter.
53 Used to set YES/NO of user calibration permission.
65 Used to set the limit number of sheets for stapling.
12 345678910 W
SHARP GRAY CHART
SHARP gray chart
Patch 1 is not copied.
Patch 2 is
slightly copied.
Patch 3 is copied.
Serviceman chart (Color patch section)
Patch 7 is slightly
copied or not copied.

MX-M753N MX-M623N/M623U/M753N/M753U 1 – 10
(Method 2)
Execute SIM 67-25 to print the adjustment check pattern.
The print density must be changed gradually from the lighter level
to the darker level. The density changing direction must not be
reversed.
Patch A or B is slightly copied.
J. Function and operation check
Check that the following operations are normal.
K. Setup and adjustment data recording
Print the various setup data and the adjustment data (list) with
SIM22-6 and keep the data.
• In case of a memory trouble, if the data are not kept, all the
adjustments must be made again.
• If the data are kept, the setup values and the adjustment values
can be entered without adjustments, shortening the servicing
time.
L. Necessary procedures before moving the
machine
1) If the following options are installed, remove all of them from
the machine.
• Finisher
• Large capacity tray
2) Remove the following consumable parts from the machine.
• Paper
• Toner cartridges
• Development cartridge
3) Lock the following sections.
• Scanner (Optical section)
• Paper cassette lift plate
4) Remove the adjuster cover, and lift the adjuster.
NOTE: Since the hard disk drive is built in the machine, use care
not to exert vibrations or shocks to the machine when in
transit.
M. USB PORT selection
There are two USB ports; one on the front frame side and the other
on the rear frame side. Only one of them can be used at a time. Do
not connect the two USB ports simultaneously.
When shipping, the port on the front frame side is valid and the port
on the rear frame side is invalid. When using the USB port, be care-
ful of the total current consumption not to exceed 500mA.
The valid port can be switched by changing the setting of the MFP
PWB DIP SW.
Select the valid USB port according to the user’s request.
* The default setting for SW1/SW2 is OFF.
NOTE: After completion of option installation, revise all the firm-
ware to the latest version.
Check item list Equipped condition
Key-in (operation panel)
Display (operation panel)
Paper feed
operation
Hand feed
Main unit paper
tray
Desk unit paper
feed tray
With the desk unit installed
Paper size detection
Originals size
detection
Original table
mode
DSPF mode
RSPF mode
DSPF/RSPF
operation / two
sided copy
S-S mode
D-S mode
S-D mode
D-D mode
Bookbinding operation When the finisher is installed
Stapling operation When the finisher is installed
Grouping operation When the finisher is installed
Sorting operation When the finisher is installed
Paper exit operation When the exit tray unit (MX-TRX2)
is installed
Q (Max)
ABCDEFGH I JKLMNOP
Patch A or B is slightly copied.
PRINTER CALIBRATION
High densityLow density
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
MFP PWB DIP SW USB I/F
SW 1 SW 2 Port on the front
frame side
Port on the rear
frame side
OFF OFF Valid Invalid
OFF ON Invalid Valid
Upper side: DIP-SW1
Lower side: DIP-SW2
When tilted toward you: OFF
When tilted to the PWB side: ON

MX-M753N MX-LC10 2 – 1
MX-M753N Service Manual
[2] MX-LC10
1. Unpacking
A. Pulling out of the large capacity tray (A4) unit
1) Pull out the large capacity tray (A4) unit and packing parts.
B. Removal of the fixing material
1) Remove the fixing material from the large capacity tray.
2) Gently pull out the large capacity tray until it stops.
The large capacity tray until it stops.
3) Remove the paper feed base fixing screw (1 pc.) of the large
capacity tray.
* Before turning on the power, check to insure that the fixing
screw of the tray is removed. If the power is turned on with-
out removing the fixing screw, a trouble code will be dis-
played and may cause damage to the lift up mechanism.
4) Push the large capacity tray slowly into the original position.

MX-M753N MX-LC10 2 – 2
C. Check the packed items
1) Check that all the items are included in the package.
2. Installation
<Note before installation>
* Start installation after checking that the LINE indicator and the
DATA indicator below it on the operation panel are neither lit nor
blinking.
A. Turn OFF the power of the main unit
This is to ensure that the machine is not receiving or sending data.
1) Turn OFF the power switch on the operation panel.
2) Open the front cabinet of the main unit. Turn OFF the power
switch in the front cabinet.
3) Disconnect the power plug of the main unit from the power out-
let.
B. Attach the mounting plate upper and the lower
front/rear connecting plate
1) Attach the mounting plate upper (Package part No. 1) with the
fixing screw A (Package part No. 4) to the installation part of
right side of the main unit. When installing, put the rubber sec-
tion ( ) of the mounting plate upper on the lower side.
2) Remove the fixing screws of the front/rear cover on the lower
part of the main unit. Attach the connecting plate lower front
(Package part No. 2) to the lower front side of the main unit
with the fixing screw B (Package part No. 5).
Attach the connecting plate lower rear (Package part No. 3) to
the lower rear side of the main unit with the fixing screw B
(Package part No. 5).
3) Remove the fixing screws (2 pcs.) of the machine entry port,
and remove the entry port cover.
4) Reverse the entry port cover and re-attach it to the machine.
Secure it with the two previously removed screws in procedure
3).
No. Names of bundles Quantity
1 Mounting plate upper 2
2 Connecting plate lower front 1
3 Connecting plate lower rear 1
4 Fixing screw A (Hex washer S-tight M4x18) 4
5 Fixing screw B (Hex washer S-tight M4x12) 4
2
1
3
45
OFF

MX-M753N MX-LC10 2 – 3
C. Attach of the large capacity tray to the main
unit
1) Hold the grips of the front and the rear cabinets with both
hands, and lift the left side.
2) Hang the metal fixture of the large capacity tray on the lower
front/rear connecting plate of the main unit side. Push the large
capacity tray onto the main unit and attach it.
To confirm that the large capacity tray is locked into place pull
it in the direction of the arrow as shown.
* If lock is incomplete, when the power switch is turned on, the
message, “Check installation of tray 5” is displayed on the
operation panel.
* Push the large capacity tray onto the machine, and lock it
securely.
Note 1)
When lifting the LCC, insert fingers firmly into the grip sections of
the front and rear cabinets and install slowly.
Note 2)
Turn the lock release screw of the front cover counterclockwise to
loosen and check that the screw is free.
* If the screw is tight at that time, installation will be incomplete.
<<How to separate the large capacity tray from the main
unit>>
1) Turn the lock release screw of the front cover clockwise and
tighten the screw securely to release lock.
2) Then hold the grips of the front and the rear cabinets with both
hands, and lift the left side. The large capacity tray will come
off.
FR

MX-M753N MX-LC10 2 – 4
D. Adjusting the casters
1) After installing the large capacity tray to the main unit, loosen
the screws (one in the front and one in the rear) of the adjust-
ment caster mounting plate attached to the lower side of the
large capacity tray.
At that time, the casters of the adjustment caster mounting
plate are brought into contact with the floor by the spring force.
2) Tighten the screws (one in the front and one in the rear) of the
caster mounting plate which were loosened in procedure 1).
E. Connector connection
1) Remove the fixing screw from the connector cover on the main
unit and then remove the connector cover.
2) Connect the large capacity tray interface harness connector to
the main unit connector, and tighten the connector screw to fix
the connector.
F. Paper size switch
(1) Paper size switch from A4 to LT
Since the factory setting of the paper size is A4 or LT, if paper size
switch is required, perform the following procedures.
1) Pull out the large capacity tray until it stops.
2) Loosen the stopper fixing screw (1 pc.) on the lower right side
of the paper feed tray to disable the stopper function.
3) Then pull out the paper feed tray again until it stops.
F side
R side

MX-M753N MX-LC10 2 – 5
a. Side plate size switch
1) Remove the four fixing screws (blue) which are fixing the
upper and the lower sections of the side plate F and the side
plate R.
2) Then fit the paper feed tray on the lower side of the side plate
F and the side plate R with the engraved marks of the side
plates according to the size, and insert it. Also fit the upper
side to the size and fix it with the four fixing screws (blue) that
have been removed in step 1).
b. Auxiliary guide size switch
1) When changing the size of the side plate R, check to confirm
the mark positions of " " on the side plate R and the size
guide adjustment plate.
2) Loosen the fixing screw (flat screw 1pc.) of the auxiliary guide.
3) Change the mark position ( ) of the auxiliary guide and the
cassette R from A4 to LT, and fix them with the fixing screw
(flat screw, 1pc.).
At that time, adjust so that the mark positions ( ) on the
auxiliary guide and the cassette R are at the same positions of
the mark positions ( ) of the side plate R and the size guide
adjustment plate checked in the procedure 1).
(If the scale of the size guide adjustment plate is at the center,
set it to the center. If the size guide adjustment plate is in 1mm
in the front side, set it in 1mm in the front side.)
c. Rear edge shaft switch
1) Remove the rear edge shaft fixing screw (blue) on the right
side of the paper feed tray, and remove the rear edge shaft.
2) Tighten the removed rear edge shaft with the fixing screw
(blue), and store it in the storage space inside the front cabi-
net.
F side R side
F side R side
A4 LT

MX-M753N MX-LC10 2 – 6
3) Push the paper feed tray slightly, and return the disabled stop-
per to the original position, and fix with the fixing screw (1pc.).
At that time, check to insure that the stopper pawl is engaged
with the stopper reception of the large capacity tray unit.
4) Push the large capacity tray slowly into the original position.
G. Turn ON the main power switch of the main
unit
1) Connect the power plug of the main unit into the power outlet.
2) Open the front cabinet of the main unit. Turn ON the power
switch in the front cabinet.
3) Turn ON the power switch on the operation panel.
ON