MX-M623U, MX-M753U (serv.man7). INSTALLATION MANUAL. - Sharp Copying Equipment Service Manual (repair manual). Page 14

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.

Check that the following operations are normal.

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.

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.

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.

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)

A B C D E F G H I J K L M N O P

Patch A or B is slightly copied.

High density

Low density

The patch density is identical between patches or not reversed.
The patch density is changed gradually.

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