DOWNLOAD Sharp MX-M904 / MX-M1204 (serv.man10) Service Manual ↓ Size: 90.37 MB | Pages: 127 in PDF or view online for FREE

MX-M1204  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 14

1

DSPF cnt PWB

Controls the DSPF.

2

DSPF driver PWB

Drives the DSPF motor.

3

Double feed detection PWB (DSPF)

Detects double feed of a document. 

4

DSPF CCD PWB

DSPF (back) scanning CCD.

5

SCNCNT PWB

Controls the scanner.

6

CCD PWB

Scanner (front) read CCD.

7

KEY PWB

Outputs the key operation signal. 

8

POWER LAMP PWB

Power display lamp

9

Double feed detection PWB (Main unit)

Detects double feed of paper.

10

PEDcis PWB

Detects the paper edge.

11

Size detection PWB

Detects the paper size in the tray 3.

12

Side detection PWB

Detects the paper size in the tray 4.

13

PCU PWB

Controls the engine section.

14

HL PWB

Controls the heater lamp.

15

SUB PWB

Supplies the power for the MFPC PWB/brushless motor of the machine.

16

Driver PWB (paper exit)

Drives the paper exit system transport motor.

7

8

24

26

LSU

27

25

34

33

39

37

38

35

36

9

10

29

23

32

21

28

28

31

10

6

2

13

16

1

22

5

3

17

11

14

12

19

20

18

15

4

30

MX-M1204  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 15

17

WH PWB (option)

Controls on/off of the dehumidifying heater.

18

AC PWB

Controls the power on the primary side.

19

Option power

Supplies power for the option.

20

Main power

Supplies the power for the machine.

21

Driver PWB (Paper feed)

Drives the paper feed system transport motor.

22

High voltage PWB

Outputs the main charger voltage, the developing bias voltage, the transfer voltage, and the 
transfer belt cleaning voltage. / Outputs the bias voltage for transfer cleaning brush.

23

AC terminal PWB

Interfaces the AC power for the option. (90cpm machine for Europe)

24

PCU-Flash PWB

PCU program ROM PWB.

25

LSU PWB

Controls the LSU.

26

BD PWB

Detects the laser synchronous signal.

27

LD PWB

Controls lighting the laser. (4 beams)

28

High voltage PS PWB

Prevents against leakage of the transfer current.

29

PTDL PWB

Discharge the OPC drum surface before transfer.

30

Process control sensor PWB

Detects the toner density on the drum.

31

Mother PWB

Controls power energy saving and relays the MFPc connect signal.

32

MFPC PWB

Controls the image-related items and controls all over the machine.

33

SD card memory

Stores the Main Reus program data.

34

DIMM 1

Main Reus memory (1GB)

35

DIMM 3

Sub Reus memory (1GB)

36

Sub Reus Flash memory

Stores the Sub Reus program data.

37

CF card memory

Stores the SOC program data.

38

SOCKET 1

SOC memory (2GB)

39

SOCKET 2

SOC memory (1GB)

WH1 DESK

Dehumidifying heater (Paper feed tray 1, 2)

Dehumidifies paper. (Paper feed tray 1, 2)

Option.

WH1 SCN

Scanner dehumidifying heater

Dehumidifies the scanner unit.

Option.

WH2 DESK

Dehumidifying heater (Paper feed tray 3, 4)

Dehumidifies paper. (Paper feed tray 3, 4)

Option.

WH1 SCN

WH1 DESK

WH2 DESK

MX-M1204  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 16

1

Face-up/face-down select gate

Selects face-up or face-down.

2

Paper exit/reverse select gate

Select gate when paper exit in face-down.

3

Reverse ADU select gate

Select gate of transport to the ADU section and paper exit in face-down.

4

ADU reverse select gate

Transport gate to the ADU section when duplex printing.

3

4

1

2

MX-M1204  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 17

HLTS1

Thermostat

125VAC 15A
250VAC 10A

Fusing unit

HLTS2

Thermostat

125VAC 15A
250VAC 10A

Fusing unit

F101

Fuse

T12AH AC250V 

SUB POWER

F102

Fuse

T3.15AH AC250V 

SUB POWER

F301

Fuse

T5AH AC250V 

SUB POWER

F401

Fuse

T3.15AH AC250V 

SUB POWER

F601

Fuse

T6.3AH AC250V 

SUB POWER

F602

Fuse

T6.3AH AC250V 

SUB POWER

F603

Fuse

T6.3AH AC250V 

SUB POWER

F604

Fuse

T6.3AH AC250V 

SUB POWER

F201

Fuse

F5AH AC250V 

MAIN POWER

F302

F602

F604

F304

F601

F603

F301

F102

F101

F401

F601

F501

F201

F301

F303

F305

F306

F402

F404

F001

F002

F101

F201

F401

F403

F405

AC-F2

AC-F1

AC-F4

AC-F3

F1, F2

HLTS1

HLTS2

SUB POWER

OPTION POWER

AC PWB

AC terminal PWB
(Europe 90cpm machine only)

MAIN POWER