DOWNLOAD Sharp MX-M623U / MX-M753U (serv.man10) Service Manual ↓ Size: 49.81 MB | Pages: 127 in PDF or view online for FREE

MX-M753N  CONSUMABLE PARTS  3 – 3

When the developer/drum counter reaches the specified level.
When the developer/drum rpm reaches the specified level.
When either of the above reached the specified level, it is judged
as life end.
In an actual case, when correction or warm-up operation is per-
formed as well as output operation, the developer and the drum
rotates. Therefore, the developer/drum consuming level cannot be
determined only by the copy/print quantity. When, therefore, the
rpm reaches the specified level, it is judged as life end.
To check the drum life, use SIM22-1/22-13.

The lot number is of 10 digits. Each digit indicates the content as
follows.
The number is printed on the flange on the front side.

The lot number is of 8 digits. Each digit indicates the content as fol-
lows.
The number is printed on the right under side of the back surface of
the developer bag.

A label with the management number on it is attached to the top of
the toner cartridge.

Developer/drum

300K

840K rotations

1:

Number
For this model, this digit is 2.

2:

Alphabet
Indicates the model conformity code.

3:

Number
Indicates the end digit of the production year. 

4:

Number or X, Y, Z
Indicates the production month.
X stands for October, Y November, and Z December.

5/6:

Number
Indicates the day of the production date.

7:

Number
Indicates the day of the month of packing.
X stands for October, Y November, and Z December.

8/9:

Number
Indicates the day of the packing date.

10:

Alphabet
Indicates the production factory.

1

2

3

4

5

6

7

8

9

10

1:

Alphabet
Indicates the production factory.

2:

Number
Indicates the production year.

3/4:

Number
Indicates the production month.

5/6:

Number
Indicates the production day.

7:

Hyphen

8:

Number
Indicates the production lot.

Standard environmental 
conditions

Temperature

20 – 25 °C

Humidity

65 

 5 %RH

Usage environmental 
conditions

Temperature

10 – 35 °C

Humidity

20 – 85 %RH 

Storage period

Toner/Developer: 24 months from the 
manufactured month (Production lot) under 
unsealed state
Drum: 36 months from the manufactured month 
under unsealed state

1

2

3

4

5

6

7

8

Product name

Color

Incompatibility

Production
place

Version

Serial No.
in production day

Production
year/month/day

Destination No.

85%

60%

20%

10

30

35

(Humidity)

(Temperature)

MX-M753N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 1

MX-M753N

Service Manual

 

*1: 1, 2, 3, 10 and 11 are peripheral devices. For information on these devices, see the explanations of the devices in the manual.

1

Saddle stitch finisher (MX-FN16)*

Output device that enables the use of the staple function and offset function.
To install the finisher (large stacker), a stand/1 x 500 sheet paper drawer or stand/2 x 500 sheet paper 
drawer is required.

Finisher (MX-FN15)*

Output device that enables use of the staple function, offset function and pamphlet copy function.
To install the saddle stitch finisher, a stand/1 x 500 sheet paper drawer or stand/2 x 500 sheet paper 
drawer is required.

2

Punch module (AR-PN4A/B/C/D)*

Punches holes in copies and other output.
Requires finisher (MX-FN15) or saddle stitch finisher (MX-FN16).

3

Inserter (MX-CF10)*

Paper set in an inserter can be inserted into output as covers or inserts. The inserter can be used to 
staple output and punch holes manually.

4

Automatic document feeder

This automatically feeds and scans multiple sheet originals. Both sides of two-sided originals can be 
scanned at once.

5

Front cover

Open to replace toner cartridge.

6

Operation panel

This is used to select functions and enter the number of copies.

7

Power switch

Turns the power on and off.
If the power does not come on when the power switch is turned on, check the main power switch to see 
if it is turned on.

8

Center tray

Finished sheets are deposited here.

9

Bypass tray

Special papers (including transparency film) and copy paper can be fed from the bypass tray.

10

Tray 5 (when A4 large capacity tray is installed) 
(MX-LC10)*

This holds paper.

11

Tray 5 (when A3 large capacity tray is installed) 
(MX-LCX3N)*

This tray stores max. 3,000 sheets of  8-1/2" x 11" - 11" x 17" (B5 - A3) paper (80g/m

2

), eliminating the 

need for frequent supply of paper.

12

Tray 1-Tray 2

The trays hold paper. Approximately 800 sheets of standard 8-1/2" x 11" or A4 size paper (20 lbs. (80 g/
m

2

)) can be loaded in tray 1, and approximately 1200 sheets of standard 8-1/2" x 11" or A4 size paper 

(20 lbs. (80 g/m

2

)) can be loaded in tray 2.

13

Tray 3

Tray 3 holds paper. Approximately 500 sheets of standard (20 lbs. (80 g/m

2

)) paper can be loaded in 

this tray. Tabbed paper and transparencies can also be loaded.

14

Tray 4

Tray 4 holds paper. Approximately 500 sheets of standard (20 lbs. (80 g/m

2

)) paper can be loaded in 

this tray.

MX-M753N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 2

1

Duplex unit

Open this cover to remove a misfeed from the fusing unit area.

2

Fusing unit

Toner images are fused here.

The fusing unit is hot. Take care 
in removing misfed paper.

3

Cover of the duplex unit

Open when a misfeed has occurred in duplex unit.

4

Toner cartridge*

This holds toner for printing. The toner cartridge must be replaced when 
indicated on the operation panel.

5

Main power switch

Keep this switch turned on when the fax option or Internet fax option is 
installed.

6

Right side cover

Open when a misfeed has occurred in the bypass tray or large capacity tray.

7

Upper cover of large capacity tray

Open when a misfeed has occurred in the large capacity tray.

8

Left side cover release

Push this knob up to open the left side cover.

9

Left cover of paper drawer

Open this cover to remove paper misfed in tray 3 or tray 4.

10

Photoconductive drum

Images are formed on the photoconductive drum.

Do not touch or damage the 
photoconductive drum.

MX-M753N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 3

1

Paper feed roller

This roller rotates to automatically feed the original.

2

Document feeding area cover

Open this cover to remove an original misfeed or clean the paper feed roller.

3

Original guides

These help ensure that the original is scanned correctly.
Adjust the guides to the width of the original.

4

Document feeder tray

Place originals in this tray. 1-sided originals must be placed face up.

5

Original exit tray

Originals are delivered to this tray after scanning.

6

Scanning area

Originals placed in the document feeder tray are scanned here.

7

Original size detector

This detects the size of an original placed on the document glass.

8

Reversing tray

During scanning of a 2-sided original, the original is temporarily output to this tray in order to be turned over for scanning 
of the reverse side.

9

Document glass

Use this to scan a book or other thick original that cannot be fed through the automatic document feeder.

1

USB connector (A type)

Supports USB 2.0 (Hi-Speed).
This is used to connect a USB device such as USB memory to the machine.

2

LAN connector

Connect the LAN cable to this connector when the machine is used on a network.
For the LAN cable, use a shielded type cable.

3

USB connector (B type)

Supports USB 2.0 (Hi-Speed).
A computer can be connected to this connector to use the machine as a printer.
For the USB cable, use a shielded cable.

4

Service-only connector

5

Power plug