Sharp MX-6500N / MX-7500N (serv.man11) Service Manual ▷ View online
MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 11
DEDC_R
DRUM encoder sensor (C_R)
Light transmission
Detects the drum rotation speed.
DEDK_L
DRUM encoder sensor (K_L)
Light transmission
Detects the drum rotation speed.
DEDK_R
DRUM encoder sensor (K_R)
Light transmission
Detects the drum rotation speed.
DEDM_L
DRUM encoder sensor (M_L)
Light transmission
Detects the drum rotation speed.
DEDM_R
DRUM encoder sensor (M_R)
Light transmission
Detects the drum rotation speed.
DEDY_L
DRUM encoder sensor (Y_L)
Light transmission
Detects the drum rotation speed.
DEDY_R
DRUM encoder sensor (Y_R)
Light transmission
Detects the drum rotation speed.
DHPD_C
Drum phase sensor (C)
Light transmission
Detects rotation and the phase of the OPC drum (C).
DHPD_K
Drum phase sensor (K)
Light transmission
Detects rotation and the phase of the OPC drum (K).
DHPD_M
Drum phase sensor (M)
Light transmission
Detects rotation and the phase of the OPC drum (M).
DHPD_Y
Drum phase sensor (Y)
Light transmission
Detects rotation and the phase of the OPC drum (Y).
DSW_ADU
ADU open/close detector
Light transmission
Detects open/close of the ADU section.
DSW_CS
Transport cover open/close detector
Light transmission
Detects open/close of the transport cover.
DSW_FU
Front door upper open/close detector
Light transmission
Detects open/close of the front door upper.
DSW_RL
Right lower door open/close detector
Light transmission
Detects open/close of the right lower door.
FPFD
Fusing front paper pass detector
Light reflection
Detects paper pass in front of the fusing section.
HLPCD
Fusing pressure detector
Light transmission
Detects the fusing pressure state.
HUD_M/TH_M
Temperature/humidity sensor
Temperature/humidity
sensor
sensor
Detects the temperature and the humidity. (For the process control)
LPPD
LCC transport detector
Light reflection
Detects paper transport from the LCC.
MHPS
Scanner home position sensor
Light transmission
Detects the scanner home position.
MPED
Paper empty detector
(Manual paper feed tray)
(Manual paper feed tray)
Light transmission
Detects paper.
MPFD
Paper feed detector (Manual paper feed)
Light transmission
Detects paper pass in the manual paper feed section.
MPLD1
Paper length detector
(Manual paper feed tray)
(Manual paper feed tray)
Light transmission
Detects the paper length.
MPWD
Paper width sensor
(Manual paper feed tray)
(Manual paper feed tray)
Resistance volume
Detects the paper width.
OCSW
Document size detection trigger sensor
Light transmission
Generates the document size detection trigger signal.
PDFS-R
Double feed sensor (receiving)
Supersonic sensor
Detects paper double feed.
PDFS-T
Double feed sensor (transmitting)
Supersonic sensor
Detects paper double feed.
POD1
Fusing paper exit detector
Light transmission
Detects paper pass in the fusing section.
POD2
Left paper exit detector
Light transmission
Detects paper exit to the left direction.
POD3
Right paper exit detector
Light transmission
Detects paper exit to the left direction.
PPD1
Registration pre-detection
Light reflection
Detects the paper timing before registration.
PPD2
Registration sensor
Light reflection
Detects the paper registration timing.
PRTPD
Paper exit tray paper detector
(Right paper exit tray)
(Right paper exit tray)
Light transmission
Detects paper in the paper exit tray.
PTCCHPD
PTC cleaner home position sensor
Light transmission
Detects the PTC cleaner home position. (PTCHP)
PTD
Paper Lead Edge detector
Light transmission
Detects paper lead edge after PS roller.
REGS_C/
PCS_C
PCS_C
Image registration/Density sensor (C)
Light reflection
Detects image color shift. Detects the toner patch density.
REGS_F/
PCS_F
PCS_F
Image registration/Density sensor (F)
Light reflection
Detects image color shift. Detects the toner patch density.
REGS_R/
PCS R
PCS R
Image registration/Density sensor (R)
Light reflection
Detects image color shift. Detects the toner patch density.
T1LUD
Paper upper limit detector (Paper feed
tray 1)
tray 1)
Light transmission
Detects the upper limit lift position of paper in the paper feed tray.
T1PED
Paper empty detector (Paper feed tray 1)
Light transmission
Detects paper.
T1PPD1
Paper pass sensor (Paper feed tray 1)
Light reflection
Detects paper pass in the paper transport section of the paper feed tray
1.
1.
T1PPD2
Paper pass sensor (Paper feed tray 1)
Light reflection
Detects paper pass in the paper transport section of the paper feed tray
1.
1.
T1SPD
Paper remaining quantity detector
(Paper feed tray 1)
(Paper feed tray 1)
Light transmission
Detects the paper remaining quantity.
T2LUD
Paper upper limit detector (Paper feed
tray 2)
tray 2)
Light transmission
Detects the upper limit lift position of paper in the paper feed tray.
T2PED
Paper empty detector (Paper feed tray 2)
Light transmission
Detects paper.
T2PPD1
Paper pass sensor (Paper feed tray 2)
Light reflection
Detects paper pass in the paper transport section of the paper feed tray
2.
2.
T2SPD
Paper remaining quantity detector
(Paper feed tray 2)
(Paper feed tray 2)
Light transmission
Detects the paper remaining quantity.
TCS_C
Toner density sensor (C)
Magnetic sensor
Detects toner supply from the toner cartridge. Detects the toner density
(C).
(C).
TCS_K
Toner density sensor (K)
Magnetic sensor
Detects toner supply from the toner cartridge. Detects the toner density
(K).
(K).
TCS_M
Toner density sensor (M)
Magnetic sensor
Detects toner supply from the toner cartridge. Detects the toner density
(M).
(M).
TCS_Y
Toner density sensor (Y)
Magnetic sensor
Detects toner supply from the toner cartridge. Detects the toner density
(Y).
(Y).
TFD2
Paper exit full detector (Center paper exit
tray)
tray)
Light transmission
Detects paper full in the center paper exit tray.
Signal name
Name
Type
Function/Operation
1
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MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 12
TFD3
Paper exit full detector (Right paper exit
tray)
tray)
Light transmission
Detects paper full in the right paper exit tray.
TFSD_C
Toner remaining quantity sensor (C)
Piezoelectric sensor
Detects the remaining quantity of toner in the toner hopper.
TFSD_K
Toner remaining quantity sensor (K)
Piezoelectric sensor
Detects the remaining quantity of toner in the toner hopper.
TFSD_M
Toner remaining quantity sensor (M)
Piezoelectric sensor
Detects the remaining quantity of toner in the toner hopper.
TFSD_Y
Toner remaining quantity sensor (Y)
Piezoelectric sensor
Detects the remaining quantity of toner in the toner hopper.
TH_LM1
Fusing temperature sensor 1
(Fusing roller B)
(Fusing roller B)
Non-contact thermistor
Detects the center surface temperature of the fusing roller B.
TH_LM2
Fusing temperature sensor 2
(Fusing roller B)
(Fusing roller B)
Contact-type thermistor
Detects the edge surface temperature of the fusing roller B.
TH_PS
Transfer temperature thermistor
Thermistor
Detects the around temperature of the 1st transfer drive roller.(Used for
correction of color registration)
correction of color registration)
TH_UM
Main fusing temperature sensor
(Fusing belt)
(Fusing belt)
Non-contact thermistor
Detects the center surface temperature of the fusing belt.
TH_US1
Sub fusing temperature sensor
(Fusing belt)
(Fusing belt)
Non-contact thermistor
Detects the edge surface temperature of the fusing belt.
TH_US2
Fusing temperature sensor (Fusing belt)
Contact-type thermistor
Detects the edge surface temperature of the fusing belt.
TH1_LSU
LSU thermistor 1
Thermistor
Detects the temperature in the LSU. (Used for correction of distortion.)
TH2_LSU
LSU thermistor 2
(Contained in the DB PWB)
(Contained in the DB PWB)
Thermistor
Detects the temperature in the LSU. (Used for correction of distortion.)
TNDSET
Open/close detector
(Paper feed tray 1, 2)
(Paper feed tray 1, 2)
Light transmission
Detects open/close of the paper feed trays 1 and 2.
WEBEND2
Web end detector 2
Light transmission
Detects web end.
WTBSET
Waste toner bottle detector
Light transmission
Detects installation of the waste toner bottle.
WTFD
Waste toner full detector
Light transmission
Detects full of waste toner.
Signal name
Name
Type
Function/Operation
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MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 13
7. Switches
*: Option
Signal name
Name
Type
Function/Operation
DSW_F
Front door open/close switch
Micro switch
Detects open/close of the front door. Opens/closes the power lines of the
fusing section, the motor, and the LSU laser. (DSW_FL)
fusing section, the motor, and the LSU laser. (DSW_FL)
DSW_R
Right door open/close switch
Micro switch
Detects open/close of the right door. Opens/closes the power lines of the
fusing section, the motor, and the LSU laser.
fusing section, the motor, and the LSU laser.
MSW
Main power switch
Seesaw switch
Turns ON/OFF the main power.
POW_SW
Operation panel power switch
Push switch
Turns ON/OFF the power on the secondary side.
WH_SW *
Dehumidifier heater switch
Seesaw switch
Turns ON/OFF the power line of the dehumidifier heater.
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MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 14
8. Clutches and solenoids
Signal name
Name
Type
Function/Operation
1TURC
Transfer mode select clutch (Forward rotation)
Electromagnetic clutch
Turns ON/OFF of the transfer mode select cam forward rotation.
1TURRC
Transfer mode select clutch (Reverse rotation)
Electromagnetic clutch
Turns ON/OFF of the transfer mode select cam reverse rotation.
ADUGS
ADU gate solenoid
Electromagnetic solenoid
Selects the paper exit gate (ADU gate).
C3PUC
Paper feed clutch (Paper feed tray 3)
Electromagnetic clutch
Turns ON/OFF the paper feed section roller.
C3PUS
Paper feed solenoid (Paper feed tray 3)
Electromagnetic solenoid
Lifts the paper pickup roller.
C4PUC
Paper feed clutch (Paper feed tray 4)
Electromagnetic clutch
Turns ON/OFF the paper feed section roller.
C4PUS
Paper feed solenoid (Paper feed tray 4)
Electromagnetic solenoid
Lifts the paper pickup roller.
DVC_C
DV clutch (C)
Electromagnetic clutch
Turns ON/OFF the DV unit drive.
DVC_K
DV clutch (K)
Electromagnetic clutch
Turns ON/OFF the DV unit drive.
DVC_M
DV clutch (M)
Electromagnetic clutch
Turns ON/OFF the DV unit drive.
DVC_Y
DV clutch (Y)
Electromagnetic clutch
Turns ON/OFF the DV unit drive.
LSUSS_CL
LSU shutter solenoid
Electromagnetic solenoid
Opens/closes the LSU shutter.
MPFS
Paper pickup solenoid (Manual paper feed)
Electromagnetic solenoid
Lifts the paper pickup roller.
MPGS
Paper feed gate solenoid (Manual paper feed)
Electromagnetic solenoid
Opens/closes the manual paper feed gate.
MPUC
Paper feed clutch (Manual paper feed)
Electromagnetic clutch
Turns ON/OFF the paper feed section roller.
PCSS
Image density sensor shutter solenoid
Electromagnetic solenoid
Opens/closes the shutter for the image density sensor.
PTRC1
Paper vertical transport clutch (Lower)
Electromagnetic clutch
Turns ON/OFF the transport roller in the lower section of the
vertical paper transport section.
vertical paper transport section.
PTRC2
Paper vertical transport clutch (Upper)
Electromagnetic clutch
Turns ON/OFF the transport roller in the upper section of the
vertical paper transport section.
vertical paper transport section.
T1PUC
Paper feed clutch (Paper feed tray 1)
Electromagnetic clutch
Turns ON/OFF the paper feed section roller.
T1PUS
Paper feed solenoid (Paper feed tray 1)
Electromagnetic solenoid
Lifts the paper pickup roller.
T2PUC
Paper feed clutch (Paper feed tray 2)
Electromagnetic clutch
Turns ON/OFF the paper feed section roller.
T2PUS
Paper feed solenoid (Paper feed tray 2)
Electromagnetic solenoid
Lifts the paper pickup roller.
TTRC
Transport clutch (Paper feed tray 1, 2)
Electromagnetic clutch
Turns ON/OFF the transport roller of the paper feed tray 1.
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