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MX-B381/B401  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MX-CSX1/CSX2  14 – 1

MX-B401

Service Manual

 

<Note before installation>
• Confirm that the line and data indicator (below) on the operation

panel are not lite or blinking. Then turn off machine.

• The dehumidifier heater kit for the MX-CSX1/CSX2 cannot be

installed without the main unit dehumidifier kit.
Be sure to install the dehumidifier heater kit for the main unit first,
and then install the dehumidifier heater kit for the MX-CSX1/
CSX2.

• After completion of the procedure in item G of the installation pro-

cedures of the dehumidifier heater kit for the main unit, perform
the following procedures.

* The descriptions are made on the MX-CSX1. If the MX-CSX2 is

also installed, perform the same procedures for the MX-CSX2.

1)

Pull out the paper tray, and loosen the hand screw which is on
the left side when viewed from the front.

2)

Slide the desk left cabinet to the front side.

3)

Remove a screw.

4)

Open the desk right side cabinet.

1

Desk dehumidifier heater unit

CHLDZ2043FC51

1

CHLDZ2043FC52

1

CHLDZ2043FC53

1

2

PWB supporter (KGLS-3S)

LBSHZ2029SCZZ

4

LBSHZ2029SCZZ

4

LBSHZ2029SCZZ

4

3

Mini clamp (UAMS-07-0)

LHLDW0734FCZZ

2

LHLDW0734FCZZ

2

LHLDW0734FCZZ

2

4

Heater interface PWB

CPWBF1862FC31

1

CPWBF1862FC31

1

CPWBF1862FC31

1

5

M4 x 10P tight screw

XEBS740P10000

4

XEBS740P10000

4

XEBS740P10000

4

6

WH desk I/F harness

DHAI-4383FCPZ

2

DHAI-4383FCPZ

2

DHAI-4383FCPZ

2

7

WH Frontier I/F harness

DHAI-4382FCPZ

1

DHAI-4382FCPZ

1

DHAI-4382FCPZ

1

8

Snap band

LBNDJ0043FCZ1

1

LBNDJ0043FCZ1

1

LBNDJ0043FCZ1

1

MX-B381/B401  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MX-CSX1/CSX2  14 – 2

5)

Press the right side (left side when viewed from the rear) of the
desk rear cabinet and pull the rear cabinet to the rear.

* The descriptions are made on the MX-CSX1. If the MX-CSX2 is

also installed, perform the same procedures for the MX-CSX2.

1)

Insert the PWB supporter (No.2) into the left side of the desk.
(4 positions)
* Insert the edge with flange into the desk.

2)

Insert the heater Interface PWB (No.4) into the PWB sup-
porter.

* This procedure is required only for the MX-CSX1, and is not

required for the MX-CSX2.

* When only the MX-CSX1 is installed, the WH desk I/F harness

(No.6) is not used.

1)

Pass the red connector side of the WH Frontier I/F harness
(No.7) through the clearance shown in the figure below to the
heater interface PWB on the left side.

2)

Connect the WH Frontier I/F harness (No.7) to CN-A of the
heater interface PWB (No.4).

3)

Attach the mini clamp (No.3) to the MX-CSX1.

4)

Insert the snap band attached to the WH Frontier I/F harness
into the MX-CSX1.

5)

Hang the WH Frontier I/F harness on the notch section of the
cabinet of the MX-CSX1.

6)

Pass the WH Frontier I/F harness to the saddle.

7)

Connect the WH Frontier I/F harness connector to CN4 of the
WH PWB of the main unit.

MX-B381/B401  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MX-CSX1/CSX2  14 – 3

* The descriptions are made on the MX-CSX1. If the MX-CSX2 is

also installed, perform the same procedures for the MX-CSX2.

1)

Pass the desk dehumidifier heater harness through the MX-
CSX1 to the rear side.

2)

Attach the desk dehumidifier heater to the upper side of the
MX-CSX1, and fix it with the M4 x 10P tight screw (No.5).

3)

Pass the desk dehumidifier heater harness through the mini
clamp. (2 positions)

4)

Pass the desk dehumidifier heater harness through the 500
hole of the desk dehumidifier heater similarly with C-1).

5)

Insert the connector of the desk dehumidifier heater harness
into CN-B of the heater interface PWB.

* The WH Frontier I/F harness is not used.
* When the MX-CSX2 is not installed, this procedure is not

required.

The connection procedures are described on connection between
the MX-CSX1 and the MX-CSX2. When two units of the MX-CSX2
are installed, first connect the MX-CSX1 and the MX-CSX2, then
connect the MX-CSX2 (upper stage) and the MX-CSX2 (lower
stage).
1)

Pass the white connector of the WH desk I/F harness (No.6)
through the square hole in the MX-CSX1 to the heater inter-
face PWB side.

2)

Pass the red connector of the WH desk I/F harness through
the square hole in the MX-CSX2 to the heater interface PWB
side.

3)

Hang the harness on the notch of the cabinet of the MX-CSX1.

4)

Insert the white connector of the WH desk I/F harness into CN-
C of the heater interface PWB of the MX-CSX1.

5)

Insert the red connector of the WH desk I/F harness into CN-A
of the heater interface PWB of the MX-CSX2.

1)

2)

3)

4)

5)

MX-B381/B401  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MX-CSX1/CSX2  14 – 4

6)

Bind the desk dehumidifier heater harness and the WH desk I/
F harness with the snap band, and insert them into the round
hole in the 500-sheet paper feed unit.
Cut the lead edge of the snap band with about 5mm edge left.

1)

Insert a tester between pin 1 and pin 3 of CN3 of the WH PWB
of the main unit, and check to confirm that the resistance is as
shown below.

Though the MX-CSX2 is installed, if the dehumidifier heater kit
is installed only to the MX-CSX1, the measurement value is
that "When one MX-CSX1 is installed."

1)

Install the desk cabinet and tighten the screw.

* Use enough care not to pinch the harness.

1)

Return the lock plate which is on the left side when viewed
from the machine front to the original position, and tighten the
hand screw.

2)

Fix the lock plate with the M4 x 10 P tight screws. (3 positions)
* This screw is installed so that the end user cannot remove

the MX-CSX1/CSX2 easily. Be careful not to forget installa-
tion of this screw.

1)

Cut off the notch of the square hole for the dehumidifier heater
switch on the rear cabinet.

2)

Attach the heater switch label (No.2) (which is packed together
with the dehumidifier heater kit for the machine) to the con-
caved section of the rear cabinet.
* Be careful of the attachment direction of the heater switch

label.

When one MX-CSX1 is 
installed:

1047 - 

1571



1112 - 

1668



2013 - 

3020



When one MX-CSX1 and 
one MX-CSX2 are installed:

678 - 1016



733 - 1100



1321 - 

1981



When one MX-CSX1 and 
two MX-CSX2 are installed:

501 - 751



547 - 820



983 - 1474

