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MX-M503N  MX-EBX3  17 – 2

1)

Turn the power switch located on the operation panel to the
"OFF" position.

2)

Open the front cabinet. Turn OFF the power switch in the front
cabinet of the main unit.

3)

Disconnect the power plug of the main unit from the power out-
let.

• If cables are connected to the control PWB unit, remove all

cables.

1)

Push the location indicated in the illustration to unlock, and
remove the ozone filter cover from the right cabinet rear.

2)

Remove the screw from the right cabinet rear.

3)

Remove the right cabinet rear.

4)

Remove the two screws from the control PWB unit.
• If the fax box unit is installed, carry out steps 5), 6), and 7)

additionally.

5)

Pull out the control PWB unit and remove the snap band.

6)

Remove the interface cable from the frame.

7)

Remove the connector.

8)

Pull out and remove the control PWB unit.

1)

Remove two screws for fixing the scanner function expansion
PWB from the control PWB.

2)

Use one of the fixing screw which were removed in the proce-
dure 1) to attach the mounting plate for the MX-M503N/
M453N/M363N/M283N to the scanner function expansion
PWB.

NOTE: Do not use the S tight screw provided in the package.

3

2

4

4

5

8

6

7

5

MX-M503N  MX-EBX3  17 – 3

3)

Remove the S tight screw (section A) of the controller PWB.
Use the removed S tight screw and the S tight screw provided
in the package to attach the scanner function expansion PWB
to the controller PWB.
At that time, check to confirm that the connectors (section B) of
the both PWB’s are securely connected.

• If the fax box unit is installed, carry out steps 1), 2), and 3)

additionally.

1)

Connect the interface cable to the control PWB unit.

2)

Push the interface cable into the recessed portion of the sheet
metal on the control PWB unit.

3)

Attach the snap band to the sheet metal of the control PWB
unit.

4)

Push the control PWB unit into the main unit.

5)

Secure the unit with the two screws.

6)

Fit the interface cable into the right cabinet rear cover.

7)

Attach the right cabinet rear cover to the main unit.
At this time, check that the four hooks are properly fitted to the
main unit.

8)

Secure the right cabinet rear with the screw.

9)

Attach the ozone filter cover to the main unit.

• Reconnect the cables that have been removed in step B to the

original positions of the control PWB unit.

1)

Insert the power plug of the main unit into the power outlet.

A

B

B

Back surface

1

2

3

Hook 1 Hook 2

Hook 3

Hook 4

6

8

7

MX-M503N  MX-EBX3  17 – 4

2)

Open the front cabinet. Turn ON the power switch in the front
cabinet of the main unit.

3)

Turn ON the power switch on the operation panel.

4)

Use SIM22-5 to check the firmware version of the MX-EBX3.
The ACRE version must be 02.00.J2 or later. If the version is
01.00.J2, revise the version according to the procedure of 5).

5)

Use SIM49-1 to revise the firmware to the latest version.
Then, perform the procedure of 4).

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MX-M503N  MX-PKX1  18 – 1

 

MX-M503N

Service Manual

 

NOTE:
• N model

To set up the PS driver, do not use the CD-ROM which is
included in the MX-PKX1 but use the PCL CD-ROM which is
included in the main unit.

• U model

In the case of the U model, the PCL CD ROM is not packed with
the main unit. It is packed with the optional printer expansion kit
MX-PB10 and MX-PB11.

NOTE: To enable PS3, the product key must be acquired. (For

details of the acquiring method of the product key, refer to
the distributor.)
Write down the acquired product key on the product key
sheet and pass it to the user.

1)

To enable PS3, enter the product key by the key operation of
the copier machine.
a) Touch [PRODUCT KEY INPUT].
b) Touch the input column.
c) Enter the product key with the 10-key, and touch [OK] key.

2)

After completion of the product key entry, turn OFF the power
switch and the main power switch and turn them ON.

1)

Print the test page in PS3 fonts by the key operation of the
operation panel. (Select the PS font list by the procedures
described in the data list print printer test page of the system
setup guide.)
Check to confirm that printing is made normally.

1

CD-ROM (For Screen Font)

1

2

Product key sheet

1

1

2

APPLICATION
NUMBER

MACHINE
SERIAL
NUMBER

PRODUCT
KEY

Please keep below important information.
This information will use for other products.