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MX-5141N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 3

1

Extension phone socket

When the fax function of the machine is used, an extension phone can be connected to this socket.

2

Telephone line socket

When the fax function of the machine is used, the telephone line is connected to this socket.

3

USB connector (A type)

Supports USB 2.0 (Hi-Speed). This is used to connect a USB device such as USB memory to the machine. This connector 
is not initially available for use. If you wish to use the connector, contact your service technician.

4

USB connector (B type)

Supports USB 2.0 (Hi-Speed). A computer can be connected to this connector to use the machine as a printer. For the USB 
cable, use a shielded cable.

5

LAN connector

Connect the LAN cable to this connector when the machine is used on a network. For the LAN cable, use a shielded type 
cable.

6

Service-only connector

CAUTION: This connector is for use only by service technicians. Connecting a cable to this connector may cause the 
machine to malfunction. 
Important note for service technicians: The cable connected to the service connector must be less than 118" (3 m) in length.

7

Power plug

(3)

(4)

(1)

(2)

(5)

(6)

(7)

When the fax expansion kit is installed

MX-5141N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 4

1

Touch panel

Messages and keys appear in the touch panel display.
Touch the displayed keys to perform a variety of operations.
When a key is touched, a beep sounds and the selected item is highlighted. This provides confirmation as you 
perform an operation.

2

Main power indicator

This lights up when the machine's main power switch is in the "on" position.

3

[POWER] key (

)

Use this key to turn the machine power on and off.

4

[POWER SAVE] key (

) / indicator

Use this key to put the machine into auto power shut-off mode to save energy.
The [POWER SAVE] key (

) blinks when the machine is in auto power shut-off mode.

5

[Home Screen] button

Touch this key to display the home screen. 
Frequently used settings can be registered in the home screen to enable quick and easy operation of the 
machine.

(1) 

(2)

(3)

(4)

(5)

MX-5141N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 5

1

Pickup roller

Picks up a document and feeds it to the document feed roller.

2

Document feed roller

Performs the document feed operation of documents.

3

Separation roller

Separate a document to prevent against double-feed.

4

No. 1 registration roller (Drive)

Performs resist of document transport.

5

No. 1 registration roller (Idle)

Applied a pressure to document and the registration roller, and provides transport power of the registration roller to 
document.

6

Transport roller 1 (Drive)

Transports document from No. 1 registration roller to No. 2 registration roller.

7

Transport roller 1 (Idle)

Applied a pressure to document and the transport roller, and provides the transport power of the transport roller to 
document.

8

No. 2 registration roller (Drive)

Make synchronization between the lead edge of a document and the scan start position.

9

No. 2 registration roller (Idle)

Applies a pressure to document and the registration roller, and provides transport power of the registration roller to 
document.

10

Transport roller 2 (Drive)

Transports document from the No. 1 scan section to the transport roller 3.

11

Transport roller 2 (Idle)

Applies a pressure to document and the transport roller and provides transport power of the transport roller to document.

12

Transport roller 3 (Drive)

Transports document from the transport roller 2 to the document exit roller.

13

Transport roller 3 (Idle)

Applies a pressure to document and the transport roller and provides transport power of the transport roller to document.

14

Document exit roller (Drive)

Discharges document.

15

Document exit roller (Idle)

Applies a pressure to document and the document exit roller and provides transport power of the document exit roller to 
document.

SCOV

DSPF upper door open/close detector

Detects open/close of the upper door.

Transmission type

SLCOV

DSPF lower door open/close detector

Detects open/close of the lower door.

Micro switch

SOCD

DSPF open/close detector

Detects open/close of the DSPF unit.

Transmission type

SPED1

DSPF document upper limit detector

Detects the upper limit of the DSPF document.

Transmission type

SPED2

DSPF document empty detector

Detects document empty in the document feed tray.

Transmission type

SPLS1

DSPF document length detection short detector

Detects the document length of the document feed tray upper.

Transmission type

SPLS2

DSPF document length detection long detector

Detects the document length of the document feed tray upper.

Transmission type

SPOD

DSPF document exit detector

Detects document exit of the document.

Transmission type

SPPD1

DSPF document pass detector 1

Detects pass of the document.

Transmission type

SPPD2

DSPF document pass detector 2

Detects pass of the document.

Transmission type

SPPD3

DSPF document pass detector 3

Detects pass of the document.

Transmission type

SPPD4

DSPF document pass detector 4

Detects pass of the document.

Transmission type

SPPD5

DSPF document pass detector 5

Detects pass of the document.

Transmission type

SPRDMD

DSPF document random detector

Detects the document size in random document feed.

Transmission type

SPWS

DSPF document width detector

Detects the document width of the document feed tray upper.

Volume resistor

STLD

DSPF document feed tray lower limit detector

Detects the lower limit of the document feed tray.

Transmission type

300$

300$

300$

300$

3#/6

3#/6

302$-$

302$-$ 345$

345$

300$

300$

300$

300$

3/#$

3/#$

3,#/6

3,#/6

300$

300$

30/$

30/$

30%$

30%$

34,$

34,$

30%$

30%$

3073

3073

30,3

30,3

30,3

30,3

MX-5141N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 6

STUD

DSPF document feed tray upper limit detector

Detects the upper limit of the document feed tray.

Transmission type

DSPF COPY LAMP

DSPF copy lamp

LED lamp

Radiates light onto a document to allow the CCD to scan document 
images.

SLUM

DSPF lift-up motor

PM step motor

Lifts up or moves down the document feed tray.

SPFC

DSPF document feed clutch

Electromagnetic clutch

Controls ON/OFF of the rollers in the document feed section.

SPFFAN

DSPF cooling fan motor

DC brush-less motor

Cools the motors and the clutches.

SPFM

DSPF transport motor

Hybrid step motor

Drives the transport roller.

SPOM

DSPF document exit motor

PM step motor

Drives the document exit roller.

SPUM

DSPF document feed motor

Hybrid step motor

Drives the rollers and transport rollers in the document feed section.

SRRC

DSPF No.2 registration roller clutch

Electromagnetic clutch

Controls ON/OFF of No. 2 registration roller.

STRC

DSPF transport roller clutch

Electromagnetic clutch

Controls ON/OFF of the transport roller 1.

STRRC

DSPF No.1 registration roller clutch

Electromagnetic clutch

Controls ON/OFF of No. 1 registration roller.

1

DSPF control PWB

Control PWB for DSPF

2

DSPF driver PWB

Driver PWB for DSPF

3

DSPF CCD PWB

Scans document images.

SPOM

SPUM

SPUM

SPOM

SLUM

SLUM

SPFC

SPFC

STRRC

STRRC

STRC

STRC

SRRC

SRRC

DSPF COPY LUMP

DSPF COPY LAMP

SPFFAN

SPFFAN

SPFM

SPFM