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MX-B382/B402  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MAIN UNIT  13 – 1

MX-B402

Service Manual

 

<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.

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.

1)

Remove five screws from the rear cabinet.

2)

Release the locks at the bottom.

3)

Remove the rear cabinet from the machine.

1

Dehumidifier heater unit

CPLTM7785FC51

1

CPLTM7785FC52

1

2

Heater switch label EX Pa

TLABZ5256FCZZ

1

TLABZ5256FCZZ

1

3

"Caution: HOT" label

TLABZ5459FCZZ

1

TLABZ5459FCZZ

1

4

WH harness

DHAI-4367FCPZ

1

DHAI-4367FCPZ

1

5

Saddle

LHLDW1970FCPZ

1

LHLDW1970FCPZ

1

6

Dehumidifier heater switch

QSW-C9294QCZZ

1

QSW-C9294QCZZ

1

7

WH PWB

CPWBF1858FC31

1

CPWBF1858FC32

1

8

PWB Mylar sheet

PSHEP0620FCPZ

1

PSHEP0620FCPZ

1

9

PWB 

supporter

LSUPP0117FCZZ 3

LSUPP0117FCZZ 3

10

M3 x 6 screw

XHBS730P06000

1

LBNDJ0037FCZ1

2

11

WH earth harness 200

DHAI-4390FCPZ

1

12

M3 x 8 screw

XBPS730P08KS0

1

MX-B382/B402  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MAIN UNIT  13 – 2

1)

Insert three PWB supporters (No.9) into the paper feed drive
unit.
* Insert the lead edge with flange into the metal plate.

2)

Insert the PWB Mylar sheet (No.8) into the PWB supporter.

3)

Insert the WH PWB (No.7) into the PWB supporter.
Check to confirm that the PWB supporter hook is securely
engaged with the WH PWB.

4)

Insert the saddle (No.5) into the WH PWB.

1)

Attach the WH harness to the wire saddle. (4 positions)

2)

Connect the connector. (4 positions).

3)

Pass the WH harness under the metal plate and extend it out
from the square hole in the metal plate.

1)

Attach the dehumidifier heater switch to the connector.
* Since there is no designation for polarity, insert into any ter-

minal.

* Insert fully to the bottom until it clicks.

2)

Insert the dehumidifier heater switch into the square hole in the
metal plate.
* Insert so that the connector connected to the dehumidifier

heater switch is on the right side when viewed from the rear.

1)

Remove the protection Mylar from the dehumidifier heater unit.

2)

Install the WH earth harness 200 to the plate of the dehumidi-
fier heater unit with the M3 x 6 screw (No. 10).
In this case, use care so that the terminals of the WH earth
harness 200 do not extend from the edges of the plate.

3)

Install the protection Mylar which was removed in the proce-
dure 1).
In this case, pass the harness of the dehumidifier heater unit
and the WH earth harness 200 through the square hole of the
protection Mylar.

MX-B382/B402  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MAIN UNIT  13 – 3

1)

Pull out the paper tray, and pass the harness of the dehumidi-
fier heater through the hole in the upper section of the lift-up
unit.
For the 200V series, pass the WH earth harness 200 through
the hole in the upper section of the lift-up unit.

2)

Engage the pawls of the dehumidifier heater unit with the
square holes (4 positions) in the metal plate of the main unit.

3)

Fix the dehumidifier heater installation plate FT with the M3 x 6
screw (No.10).
* At that time, arrange so that the rear section of the dehumid-

ifier heater installation plate FT is on the lift-up unit.

4)

Pass the harness of the dehumidifier heater through the wire
saddle.

5)

Connect the connector of the dehumidifier heater harness to
CN3 of the WH PWB.

6)

Pass the WH earth harness 200 through three clamps of the
machine. (200V series only)

7)

Fix the terminal of the WH earth harness 200 to the machine
frame with the M3 x 8 screw (No. 12).

1)

Insert a tester between pin 1 and pin 3 of CN3 of the WH PWB,
and check to confirm that the resistance is as shown below.
120V series: 2.304K

 - 3.456K

230V series: 4.232K

 - 6.348K

Lift up unit

200V Only

MX-B382/B402  DEHUMIDIFIER HEATER KIT (SERVICE PARTS) FOR THE MAIN UNIT  13 – 4

1)

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

2)

Attach the heater switch label EX Pa (No.2) to the concaved
section of the rear cabinet.
* Be careful of the attachment direction of the heater switch

label EX Pa.

3)

Cut the inside section of the rear cabinet where the harness
passes through.

1)

Where the "Caution: HOT" label will be placed. (see illustra-
tion). Clean with alcohol.

2)

Attach the "Caution: HOT" label to the paper tray.

1)

Turn ON the dehumidifier heater switch. (Press the upper sec-
tion of the switch.)

2)

Measure the resistance between the earth terminal and the AC
terminal at the lead edge of the AC cord with a tester, and
check to confirm that the resistance is infinite.
* Check the resistance between the non-grounding side (Live)

and the grounding side and between the non-grounding side
(Neutral) and the grounding side.

* If there is conduction between the grounding terminal and

the AC terminal, the harness on the primary side may be in
contact with the grounding wire (the wire may be pinched or
in some trouble). In this case, disassemble it again and
check to confirm that there is no pinching or wiring mistake.

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0.5mm