Sharp MX-M623U / MX-M753U (serv.man10) Service Manual ▷ View online
MX-M753N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 12
I. Clutch/solenoid
MPFC
HPFC
T2PFC
MFPUS
MPFGS
T2PUS
HPLS
M1PFC
T1PFC
DSKPFC1
M2PFC
M2PFC
M1PUS
T1PUS
DSKPFC2
DGS
PSPS
M2PUS
Signal name
Name
Function/Operation
Type
DGS
Paper exit gate solenoid
Paper exit gate drive
Electromagnetic solenoid
DSKPFC1
Paper feed tray 3/4 paper transport clutch 1
Paper feed tray 3/4 section paper transport roller ON/OFF control
Electromagnetic clutch
DSKPFC2
Paper feed tray 3/4 paper transport clutch 2
Paper feed tray 3/4 section paper transport roller ON/OFF control
Electromagnetic clutch
HPFC
Horizontal paper transport clutch
Manual paper feed, paper feed tray 2 section, LCC paper transport
roller ON/OFF control
roller ON/OFF control
Electromagnetic clutch
HPLS
Paper guide lock solenoid
Lock the horizontal transport paper guide
Electromagnetic solenoid
M1PFC
Paper feed clutch (Paper feed tray 3)
Paper freed tray 3 section roller ON/OFF control
Electromagnetic clutch
M1PUS
Paper pickup solenoid (Paper feed tray 3)
Presses the paper pickup roller onto paper
Electromagnetic solenoid
M2PFC
Paper feed clutch (Paper feed tray 4)
Paper freed tray 4 section roller ON/OFF control
Electromagnetic clutch
M2PUS
Paper pickup solenoid (Paper feed tray 4)
Presses the paper pickup roller onto paper
Electromagnetic solenoid
MFPUS
Paper pickup solenoid (Manual paper feed)
Presses the paper pickup roller onto paper
Electromagnetic solenoid
MPFC
Paper feed clutch (Manual paper feed)
Manual paper feed section paper feed roller ON/OFF control
Electromagnetic clutch
MPFGS
Manual paper feed gate solenoid
Manual feed gate solenoid open/close control.
Electromagnetic solenoid
PSPS
Separation solenoid
OPC drum separation pawl drive
Electromagnetic solenoid
T1PFC
Paper feed clutch (Paper feed tray 1)
Paper freed tray 1 section roller ON/OFF control
Electromagnetic clutch
T1PUS
Paper pickup solenoid (Paper feed tray 1)
Presses the paper pickup roller onto paper.
Electromagnetic solenoid
T2PFC
Paper feed clutch (Paper feed tray 2)
Paper feed tray 2 section roller ON/OFF control
Electromagnetic clutch
T2PUS
Paper pickup solenoid (Paper feed tray 2)
Presses the paper pickup roller onto paper.
Electromagnetic solenoid
MX-M753N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 13
J. Drive motor
Signal name
Name
Type
Function/Operation
NOTE
ADM1
Duplex (ADU) motor 1
Stepping motor
Drives the paper transport roller 2 and the paper
transport roller 19.
transport roller 19.
High speed
ADM2
Duplex (ADU) motor 2
Stepping motor
Drives the paper exit rollers 20 and 21.
Selection of Normal speed/High
speed
speed
DM
OPC drum motor
DC brush-less motor
Drives the OPC drum and the transfer section.
DVM
Developing system
DC brush-less motor
Drives the developing section.
FUM
Fusing motor
DC brush-less motor
Drives the fusing section.
M1LUM
Paper feed tray lift-up motor
(Paper feed tray 3)
(Paper feed tray 3)
DC brush motor
Drives the lift plate of the paper feed tray.
Selection of Rotation mode/
Brake mode
Brake mode
M2LUM
Paper feed tray lift-up motor
(Paper feed tray 4)
(Paper feed tray 4)
DC brush motor
Drives the lift plate of the paper feed tray.
Selection of Rotation mode/
Brake mode
Brake mode
MIM
Scanner (reading) motor
Stepping motor
Drives the scanner (reading) section.
MM
Main motor
DC brush-less motor
Drives the paper feed trays 1, 2, 3, and 4, and the
manual paper feed section.
manual paper feed section.
PGM
Polygon motor
DC brush-less motor
Drives the scanner (writing) (LSU) unit mirror.
POM1
Paper exit motor 1
Stepping motor
Drives the paper transport roller 16.
Selection of Normal speed/High
speed
speed
POM2
Paper exit motor 2
Stepping motor
Drives the paper exit roller 1.
Selection of Normal speed/High
speed
speed
RRM
Resist roller motor
Stepping motor
Drives the resist roller.
T1LUM
Paper feed tray lift-up motor
(Paper feed tray 1)
(Paper feed tray 1)
DC brush motor
Drives the lift plate of the paper feed tray.
Selection of Rotation mode/
Brake mode
Brake mode
T2LUM
Paper feed tray lift-up motor
(Paper feed tray 2)
(Paper feed tray 2)
DC brush motor
Drives the lift plate of the paper feed tray.
Selection of Rotation mode/
Brake mode
Brake mode
TM1
Toner motor 1
Stepping motor
Transports toner in the toner hopper to the
developing unit./ Transports waste toner to the
waste toner section.
developing unit./ Transports waste toner to the
waste toner section.
TM2
Toner motor 2
Synchronous motor
Transports toner in the toner bottle to the toner
hopper.
hopper.
TRM
Resist roller front drive motor
Stepping motor
Drives the paper transport roller 15.
Normal speed mode/ Resist roller
front paper transport timing
control (Warp amount control)
front paper transport timing
control (Warp amount control)
TURM
Transfer separation motor
DC brush motor
Drives and separates the transfer belt.
When executing the process
correction and detecting a jam,
the transfer belt is separated
from the OPC drum.
correction and detecting a jam,
the transfer belt is separated
from the OPC drum.
VPM
Vertical paper transport motor
Stepping motor
Drives the paper transport rollers 4 and 13.
Normal speed mode
WEBM1
Web motor
Synchronous motor
Drives the upper web roller
WEBM2
Web motor
Synchronous motor
Drives the lower web roller
VPM
TRM
ADM1
ADM2
TURM
MM
M1LUM
M2LUM
T1LUM
T2LUM
DM
FUM
PGM
MIM
TM2
TM1
POM1
POM2
POM2
DVM
WEBM1
RRM
WEBM2
MX-M753N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 14
K. Lamp/heater/gate
Signal name
Name
Type
Function/Operation
NOTE
CCFT
LCD backlight
Cold Cathode
Fluorescent Tube
Fluorescent Tube
Backlight for LCD
CL1
Scanner lamp
Xenon lamp
Radiates lights onto a document for the CCD to scan the
document image.
document image.
DL
Discharge lamp
Lamp
Discharges electric charges on the OPC drum.
HL
Heater lamp
Halogen lamp
Heats the upper fusing roller.
WH1 DESK
Dry heater
(Paper feed tray 1, 2)
(Paper feed tray 1, 2)
Nichrome wire (18W)
Dehumidifies paper on the paper feed tray 1 and 2.
Service parts
WH2 DESK
Dry heater
(Paper feed tray 3, 4)
(Paper feed tray 3, 4)
Nichrome wire (10W)
Dehumidifies paper on the paper feed tray 3 and 4.
No.
Name
Function/Operation
NOTE
1
Switchback gate
Selects the paper route when discharging paper to the inner
tray and when switching back to the exit or finisher.
tray and when switching back to the exit or finisher.
Switched not by the
solenoid drive but by the
automatic procedure.
solenoid drive but by the
automatic procedure.
2
Paper exit gate
Selects the paper route to transport paper to the duplex (ADU)
section or to discharge paper.
section or to discharge paper.
Driven by the solenoid
(DGS).
(DGS).
3
Manual feed gate
Specifies the lead edge position of paper when setting paper.
(Prevention against double feed and multifeed of paper into the
paper feed roller)
(Prevention against double feed and multifeed of paper into the
paper feed roller)
CL1
CCFT
3
2
1
1
WH1 DESK
WH2 DESK
DL
HL
MX-M753N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 15
L. Fan motor
Signal name
Name
Type
Function/Operation
NOTE
CFM-DC1
Power cooling fan motor
DC brush-less motor
Cools the DC power unit.
PWM control
CFM-DC2
Power cooling fan motor
DC brush-less motor
Cools the DC power unit.
PWM control
CFM-DV
Developing section cooling fan motor
DC brush-less motor
Cools the developing section.
PWM control
CFM-R1
Process cooling fan motor 1 (LSU/process section)
DC brush-less motor
Cools the LSU/ process section.
PWM control
CFM-R2
Process cooling fan motor 2 (LSU/process section)
DC brush-less motor
Cools the LSU/ process section.
PWM control
CFM-R3
Process cooling fan motor 3 (LSU/process section)
DC brush-less motor
Cools the LSU/ process section.
PWM control
CFM-U1
Fusing section cooling fan motor 1
(Paper exit/duplex (ADU) section) (Top surface)
(Paper exit/duplex (ADU) section) (Top surface)
DC brush-less motor
Exhaust heat from the fusing section.
PWM control
CFM-U2
Fusing section cooling fan motor 2
(Paper exit/duplex (ADU) section) (Paper exit rear side)
(Paper exit/duplex (ADU) section) (Paper exit rear side)
DC brush-less motor
Exhaust heat from the fusing section.
PWM control
CFM-U3
Fusing section cooling fan motor 3
(Paper exit/duplex (ADU) section) (Top surface)
(Paper exit/duplex (ADU) section) (Top surface)
DC brush-less motor
Exhaust heat from the fusing section.
PWM control
CFM-U4
Fusing section cooling fan motor 4
(Paper exit/duplex (ADU) section) (Paper cooling fan motor)
(Paper exit/duplex (ADU) section) (Paper cooling fan motor)
DC brush-less motor
Cools paper which is discharged to the
inner tray.
inner tray.
PWM control
MFPCFAN
Controller cooling fan motor
DC brush-less motor
Cools the controller.
PWM control
VFM-BKL
Process exhaust fan motor 4
DC brush-less motor
Exhaust ozone and heat from the process
section.
section.
PWM control
VFM-BKR
Fusing exhaust fan motor
DC brush-less motor
Exhaust heat from the fusing section.
PWM control
VFM-BKU
Paper cooling fan motor
DC brush-less motor
Cools the paper and the paper exit
section.
section.
PWM control
VFM-EX1
Process exhaust fan motor 1 (Front side)
DC brush-less motor
Exhaust ozone and heat from the process
section.
section.
PWM control
VFM-EX2
Process exhaust fan motor 2 (Center)
DC brush-less motor
Exhaust ozone and heat from the process
section.
section.
PWM control
VFM-EX3
Process exhaust fan motor 3 (Rear side)
DC brush-less motor
Exhaust ozone and heat from the process
section.
section.
PWM control
CFM-DV
VFM-BKU
CFM-U2
CFM-U4
VFM-BKR
MFPCFAN
CFM-DC1
CFM-DC2
VFM-BKL
CFM-R1
CFM-R2
CFM-R3
CFM-U3
VFM-EX1
VFM-EX2
VFM-EX3
VFM-EX2
VFM-EX3
CFM-U1
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