Sharp MX-B381 / MX-B401 (serv.man7) Service Manual ▷ View online
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 6
7. Switches
SCOV
RSPF cover open/close detector
Transmission type
Detects open/close of the RSPF cover.
RSPF unit
SOCD
RSPF open/close detector
Transmission type
Detects open/close of the RSPF unit itself.
RSPF unit
SPED
RSPF document empty detector
Transmission type
Detects that a document is in the document tray.
RSPF unit
SPPD1
RSPF transport detector 1
Transmission type
Detects a document which passes the paper path.
RSPF unit
SPPD2
RSPF transport detector 2
Transmission type
Detects a document which passes the paper path.
RSPF unit
TCS_K
Toner density sensor
Magnetic sensor
Detects the toner density in the developing cartridge.
Developing cartridge
TFD2
Paper exit tray full detector
Transmission type
Detects the full state of the paper exit tray.
Paper exit upper PG unit
TH/HUD
Temperature humidity sensor
Temperature
humidity sensor
humidity sensor
Detects the temperature and the humidity around the
machine.
machine.
Right door unit
Signal name
Name
Type
Function/Operation
1TNFD
Waste toner full detection switch
Micro switch
Detects the waste toner full.
DRCRU_K
OPC drum initial (new OPC drum) detector (BK)
Micro switch
Detects the OPC drum initial state (new OPC drum).
DSW-F
Front door open/close switch
Micro switch
Detects open/close of the front door, and turns ON/OFF the power line of
the fusing, the motor and the LSU laser.
the fusing, the motor and the LSU laser.
DSW-R
Right door open/close switch
Micro switch
Detects open/close of the right door unit, and turns ON/OFF the power
line of the fusing, the motor and the LSU laser.
line of the fusing, the motor and the LSU laser.
MSW
Main switch
Seesaw switch
Turns ON/OFF the main DC power source.
PWRSW
Operation panel power switch
Push switch
Outputs the ON/OFF control signal of the DC power source.
Signal name
Name
Type
Function/Operation
Note
DSW-F
DRCRU_K
1TNFD
DSW-R
PWRSW
MSW
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 7
8. Clutches and solenoids
Signal name
Name
Type
Function/Operation
1TURC_1
Primary transfer separation clutch 1
Electromagnetic clutch
Controls the primary transfer separation mode.
2TURC
Secondary transfer separation clutch
Electromagnetic clutch
Controls open/close of the resist sensor cover.
ADUC1
ADU transport clutch 1
Electromagnetic clutch
Controls ON/OFF of the roller in the switchback section.
CPFC
Tray vertical transport clutch
Electromagnetic clutch
Controls ON/OFF of the paper transport roller in the tray paper feed section.
CPUC1
Paper feed clutch (Tray paper feed)
Electromagnetic clutch
Controls ON/OFF of the roller in the tray paper feed section.
HLPCS
Fusing pressure release solenoid
Electromagnetic solenoid
Controls the pressure applied to the upper and the lower heat rollers in the
fusing section.
fusing section.
MPFS
Paper pickup solenoid
(Manual paper feed)
(Manual paper feed)
Electromagnetic solenoid
Controls ON/OFF of the pick-up operation of the paper feed roller in the
manual paper feed section.
manual paper feed section.
SPUS
RSPF paper feed roller solenoid
Electromagnetic solenoid
Controls ON/OFF of the paper feed roller in the RSPF paper feed section.
SPUS
1TURC_1
2TURC
HLPCC
MPFS
ADUC1
CPFC
CPUC1
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 8
9. Drive motors
Signal name
Name
Type
Function/Operation
CLUM
Paper tray lift-up motor
(Paper feed tray 1)
(Paper feed tray 1)
DC brush-less motor
Drives the lift plate of the paper feed tray.
CPFM
Paper feed motor
Stepping motor
Drives the paper feed section.
DVM_K
Developing drive motor
Brush-less motor
Drives the development cartridge, the drum cartridge, the primary transfer
unit, and the secondary transfer unit.
Also separates the primary transfer unit.
unit, and the secondary transfer unit.
Also separates the primary transfer unit.
FUM
Fusing drive motor
DC brush motor
Drives the fusing unit.
MIM
Scanner motor
Stepping motor
Drives the carriage unit.
PGM1
Polygon motor 1
DC brush-less motor
Scans the laser beam.
POM
Paper exit drive motor
Stepping motor
Drives the paper exit roller.
RRM
Registration motor
Stepping motor
Drives the resist roller and controls ON/OFF.
SPFM
RSPF transport motor
Stepping motor
Drives the RSPF unit.
TNM_K
Toner motor K
Synchronous motor
Transports toner from the toner cartridge to the developing unit.
SPFM
MIM
POM
TNM_K
FUM
PGM1
RRM
CPFM
CLUM
DVM_K
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 9
10. Lamps
Signal name
Name
Type
Function/Operation
CCFT
LCD back-light
CCFT cool cathode ray tube
Back-light for the LCD
CLI
Scanner lamp
CCFL (Cold cathode fluorescent lamp)
Radiates lights onto a document for the CCD to scan document images.
DL_K
Discharge lamp K
LED
Discharges electric charges on the OPC drum.
HL_EX
External heater lamp 1
Halogen lamp
Heats the upper heat roller through an external heat roller.
HL_EX2
External heater lamp 2
Halogen lamp
Heats the upper heat roller through an external heat roller.
HL_Main
Upper heater lamp
Halogen lamp
Heats the upper heat roller. (Main)
HL_Sub
Lower heater lamp
Halogen lamp
Heats the lower heat roller. (Main)
CCFT
CLI
DL_K
HL_Main
HL_EX1
HL_EX2
HL_Sub
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