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MX-C401  MX-C310/MX-C311/MX-C312/MX-C380/MX-C381/MX-C400/MX-C401 (MAIN UNIT)  1 – 17

• It takes several minutes to complete the operation. After

completion of the operation, "COMPLETE" is displayed.

• After completion of the operation, the simulation is canceled.

12) Use the servicing color test chart (UKOG-0326FCZZ/UKOG-

0326FC11) in the Text/Printed Photo mode (Manual) to check
the copy color balance and density. (Refer to the item of the
copy color balance and density check.)

If the copy color balance and density are not satisfactory, per-
form the following procedures.

13) Execute the initial setting of the half tone image correction.

(SIM 44-21)

14) Execute the half tone image correction. (Forcible execution)

(SIM44-26)

15) Use the servicing color test chart (UKOG-0326FCZZ/UKOG-

0326FC11) in the Text/Printed Photo mode (Manual) to check
the copy color balance/density. (Refer to the item of the copy
color balance/density check.)

Though the procedures 13) - 15) are performed, the copy color
balance and density are not in the specified range, there may
be another cause.

Troubleshoot the cause and repair or perform proper treat-
ments, and try all the procedures of the print image adjustment
from the beginning.

If the automatic adjustment cannot obtain satisfactory results
of the copy color balance and density, use SIM 46-21 (ADJ
14C) (Manual adjustment).

16) Check the printer color balance and density.

There are two methods to check the color balance and density.

Use SIM 64-5 to print the print test pattern and check the print
color balance and the density.

Set each setting value to the default and press [EXECUTE]
key, and the print test pattern is printed.

(Refer to the item of the printer color balance and density
check.)

Use SIM67-25 to print the color balance adjustment sheet and
compare the black patch color balance of each process (CMY)
with the black patch. This procedure allows checking the color
balance adjustment result correctly.

If the color balance of each patch of the process black (CMY
mixed color) is slightly shifted to Magenta, it means that the
adjustment is proper. If the color balance of the adjustment
pattern printed in this mode is slightly shifted to Magenta, it is
converted into the natural gray color balance by the color table
in an actual printer mode. (When the color balance target is
DEF 1.)

If a satisfactory result on the print color balance and the den-
sity is not obtained with the automatic adjustment, execute the
manual adjustment (SIM 67-25) (ADJ 15B).

For the check procedures of the copy color balance/density and the
printer color balance/density, refer to ADJ 14 and ADJ 15.

To use the remote operation panel function, the password for the
remote operation panel function must be entered on the password
input menu displayed on the VNC boot screen. Note that, therefore,
the password must be set in advance to use the remote operation
panel function.

Let the user make the password, and use SIM26-78 to set it.

1)

Enter the SIM26-78 mode.

(4.3 Inch LCD model)

(8.5/7.0 Inch LCD model)

2)

Enter the password with 10 key. (Within 5 - 8 digits)

The entered password is displayed on the column of "NEW."
To modify the entered password, use clear key to delete the
password digit by digit.

3)

Press [SET] key, and the password is set.

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High density

Low density

Patch A of each of Y, M, C, and
BK are not copied.

2) Patch C or D of each of Y, C, M, and

BK is very slightly copied.

3) Patch for each of C, M, Y, BK

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

1) The max. density section is not blurred.

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MX-C401  MX-C310/MX-C311/MX-C312/MX-C380/MX-C381/MX-C400/MX-C401 (MAIN UNIT)  1 – 18

Check to confirm that the following operations are normal.

There are two USB ports, one on the rear frame side and the other
on the front frame side. Only either of them can be used.

When shipping, the port on the front frame side is valid and the port
on the rear frame side is invalid.

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.

Use SIM22-6 to print and store the settings and adjustments data
(list).

• When a memory trouble occurs, if the above information is not

available, all the adjustments must be performed from the begin-
ning.

• If the above information is available, the setting and adjustment

values can be directly entered, shortening the servicing time.

1)

If the following option is installed, remove it from the machine.

• Finisher

2)

Remove the following consumable parts from the machine.

• Paper

• Toner cartridge

• Developer cartridge

NOTE: When moving take extreme care to prevent shock or vibra-

tion to the machine as there is a hard drive built into this
product.

Key input operation (Operation panel)

Display (Operation panel)

Paper feed 
operation

Manual paper feed

Main unit paper feed 
tray

Option paper feed unit

With the option paper feed 
unit installed

Paper size 
detection operation

Manual paper feed tray

RSPF operation / 
Duplex copy 
operation

S-S mode

D-S mode

S-D mode

D-D mode

Stapling operation

With the finisher installed

Offset operation

With the finisher installed

OFF

OFF

Valid

Invalid

OFF

ON

Invalid

Valid

SW1

ON

OFF

SW2

MX-C401  MX-CSX1/CSX2 (500 SHEET PAPER FEED UNIT)  2 – 1

MX-C401

Service Manual

 

1)

Remove the 500 sheet paper feed unit from the polyethylene
bag, and remove the fixing tape and the protection material.

Before execution of installation, check to confirm that the communi-
cation lamp on the operation panel and the data lamp under it are
not lighted or blinking.

1)

Turn OFF the power switch on the operation panel.

2)

Check to confirm that the operation panel is turned OFF, and
then turn OFF the power switch.

3)

Disconnect the power plug from the power outlet.

* In the example below, installation of the MX-CSX1 to the MX-

CSX2 is described. Installation of the MX-CSX2 to another MX-
CSX2 is performed similarly.

1)

Put the MC-CSX1 on the MX-CSX2 so that they fit together.

NOTE: When holding the main unit with the MX-CSX2 and the 

MX-CSX1 installed, use two persons.

MX-C401  MX-CSX1/CSX2 (500 SHEET PAPER FEED UNIT)  2 – 2

* When the MX-CSX1 is put on the MX-CSX2, it is automati-

cally locked at the left and the right of the rear side.

2)

Pull out the trays of the MX-CSX1 and the MX-CSX2.

3)

Loosen the hand screws on the left and the right sides.

4)

Hang the fixing clasp on the main unit, and tighten the hand
screws.

5)

Push in and close the trays.

NOTE: If the main unit is combined with the MX-CSX1 only, it must 

be used as a desktop machine and must not be used on 
the floor in order to prevent against falling.

1)

Put the main unit on the MX-CSX1 so that they fit together.

NOTE: When holding the main unit, use two persons.