Sharp MX-M904 / MX-M1204 (serv.man10) Service Manual ▷ View online
MX-M1204 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 6
E. Sensors
Signal name
Name
Type
Function / Operation
Active condition
Note
APFD1
ADU paper entry detection 1
Reflection type
Detects the ADU paper pass.
APFD2
ADU paper entry detection 2
Reflection type
Detects the ADU paper pass.
APPD1
ADU transport detection 1
Reflection type
Detects the ADU paper transport.
APPD2
ADU transport detection 2
Reflection type
Detects the ADU paper transport.
APPD3
ADU transport detection 3
Reflection type
Detects the ADU paper transport.
DSBD3
DSBD3
SPLS3
SPLS3
SPLS1
SPLS1
SPWS
SPWS
SPED
SPED
STUD
STUD
SPRDMD1
SPRDMD1
SPPD1
SPPD1
SPPD2
SPPD2
SPPD3
SPPD3
SPPD4
SPPD4
SPPD5
SPPD5
SPPD6
SPPD6 SOCD
SOCD
MHPS
MHPS
OCSW
OCSW
SEL_ANIN_2
SEL_ANIN_2
SEL_ANIN_4
SEL_ANIN_4
T1LUD
T1LUD
T1PED
T1PED
T1SPD
T1SPD
T2LUD
T2LUD
T2PED
T2PED
TANSET
TANSET
T2SPD
T2SPD
C3SS1
C3SS1
C3SS3
C3SS3
C3SS2
C3SS2
C3SS4
C3SS4
C3SS4
C3SPD
C3SPD
C3LUD
C3LUD
C3PFD
C3PFD
VPPD
VPPD
PPD1
PPD1
PPD2
PPD2
C4PWS
C4PWS
TNBOX
TNBOX
HUS-RA/TH-RA
HUS-RA/TH-RA
HUS-CL/TH-CL
HUS-CL/TH-CL
PCS
PCS
PPD3
PPD3
PPD4
PPD4
BOTSW
BOTSW
TFSD
TFSD
BOTD
BOTD
MCHPS1
MCHPS1
DESS
DESS
POIND
POIND
POD
POD
DSBD1
DSBD1
DSBD2
DSBD2
FDSBD
FDSBD
APPD1
APPD1
APPD2
APPD2
APPD3
APPD3
APFD1
APFD1
WEBEND1
WEBEND1
WEBSPD
WEBSPD
TCS
TCS
T1PPD1
T1PPD1
T1PPD2
T1PPD2
APFD2
APFD2
PDFS-T
PDFS-T
PDFS-R
PDFS-R
T2PFD
T2PFD
DSW-CS
DSW-CS
T1PFD
T1PFD
C4PFD
C4PFD
TNF
TNF
C3PED
C3PED
C4LUD
C4LUD
C4PED
C4PED
C4SS1
C4SS1
C4SS3
C4SS3
C4SS2
C4SS2
C4SS4
C4SS4
C4SS4
C4SPD
C4SPD
SEL_IN_8
SEL_IN_8
SEL_IN_7
SEL_IN_7
SEL_IN_5
SEL_IN_5
SEL_IN_6
SEL_IN_6
SEL_ANIN_1
SEL_ANIN_1
SLCOV
SLCOV
SPPD7
SPPD7
SPOD
SPOD
SDFS1
SDFS1
SDFS2
SDFS2
SDFS2
SCOV
SCOV
STLD
STLD
PTD
PTD
CIS
CIS
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MX-M1204 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 7
BOTD
Toner cartridge rotation detection
Transmission
type
type
Detects toner cartridge rotation
BOTSW
Toner tray detection
Transmission
type
type
Detects the toner tray.
C3LUD
Cassette 3 upper limit detection
Transmission
type
type
Detects lift up of the cassette 3.
C3PED
Cassette 3 paper presence detection
Reflection type
Detects the cassette 3 paper presence.
C3PFD
Cassette 3 paper entry detection
Reflection type
Detects the cassette 3 paper pass.
C3SPD
Cassette 3 remaining quantity detection
Transmission
type
type
Detects the cassette 3 remaining
quantity.
quantity.
C3SS1
Cassette 3 size detection 1
Tact switch
Detects the cassette 3 paper size.
Detects insertion of the cassette 3 by
detecting one of cassette 3 size
detection 1 to 4.
Detects insertion of the cassette 3 by
detecting one of cassette 3 size
detection 1 to 4.
PWB
unit
unit
C3SS2
Cassette 3 size detection 2
Tact switch
C3SS3
Cassette 3 size detection 3
Tact switch
C3SS4
Cassette 3 size detection 4
Tact switch
C4LUD
Cassette 4 upper limit detection
Transmission
type
type
Detects lift up of the cassette 4.
C4PED
Cassette 4 paper presence detection
Reflection type
Detects the cassette 4 paper presence.
C4PFD
Cassette 4 paper entry detection
Reflection type
Detects the cassette 4 paper pass.
C4PWS
Cassette 4 width detection
Volume resistor
Detects the cassette 4 width.
C4SPD
Cassette 4 remaining quantity detection
Transmission
type
type
Detects the cassette 4 remaining
quantity.
quantity.
C4SS1
Cassette 4 size detection 1
Tact switch
Detects the cassette 4 paper size.
Detects insertion of the cassette 4 by
detecting one of cassette 4 size
detection 1 to 4.
Detects insertion of the cassette 4 by
detecting one of cassette 4 size
detection 1 to 4.
PWB
unit
unit
C4SS2
Cassette 4 size detection 2
Tact switch
C4SS3
Cassette 4 size detection 3
Tact switch
C4SS4
Cassette 4 size detection 4
Tact switch
CIS
Image position sensor
Contact image
sensor
sensor
Detects the paper edge position in the
off-center direction in the PS section.
off-center direction in the PS section.
DESS
Surface potential sensor
Surface
potential
sensor
potential
sensor
Detects the surface potential of the
photoconductor.
photoconductor.
DSBD1
Duplex reverse detection 1
Reflection type
Detects the duplex reverse paper pass.
DSBD2
Duplex reverse detection 2
Reflection type
Detects the duplex reverse paper pass.
DSW-CS
Cassette right door open/close
detection
detection
Transmission
type
type
Detects the cassette right door open/
close.
close.
FDSBD
Face down reverse detection
Reflection type
Detects face down reverse paper pass.
HUS-CL/
TH-CL
TH-CL
Temperature humidity sensor 2
Temperature
humidity sensor
humidity sensor
Detects temperature and humidity in
the machine.
the machine.
HUS-RA/
TH-RA
TH-RA
Temperature humidity sensor 1
Temperature
humidity sensor
humidity sensor
Detects the temperature and humidity
under the installation environment.
under the installation environment.
MCHPS1
MC cleaner home position detection
Transmission
type
type
Detects the MC cleaner home position.
MHPS
Scanner home position sensor
Photo
interrupter
interrupter
Scanner home position detection.
OCSW
Original cover SW
Photo
interrupter
interrupter
Document size detection trigger.
L when the DSPF unit is open.
PCS
Procon sensor
Reflection type
Detects the ID density.
PDFS-R
Double feed sensor (receiving)
Supersonic
sensor
sensor
Detects paper double feed.
105/120cpm machine only
PDFS-T
Double feed sensor (transmitting)
Supersonic
sensor
sensor
105/120cpm machine only
POD
Paper exit detection
Reflection type
Detects paper exit.
POIND
Paper exit paper entry detection
Reflection type
Detects the paper pass at the paper
exit port.
exit port.
PPD1
Transport detection 1
Reflection type
Detects paper transport in the transport
path.
path.
PPD2
Transport detection 2
Reflection type
Detects paper transport in the transport
path.
path.
PPD3
Transport detection 3
Reflection type
Detects paper transport in the transport
path.
path.
PPD4
Transport detection 4
Reflection type
Detects paper transport in the transport
path.
path.
PTD
PS section paper lead edge detection
sensor
sensor
Reflection type
Detects a shift at the paper lead edge in
the PS section.
the PS section.
105/120cpm machine only
SCOD
DSPF open/close sensor
Transmission
type
type
Detects open/close of the DSPF unit.
H when the DSPF unit is open.
SDFS1
DSPF double feed sensor (transmitting)
Supersonic
sensor
sensor
Detects double feed.
SDFS2
DSPF double feed sensor (receiving)
Supersonic
sensor
sensor
Detects double feed.
SEL_ANIN_1
Main scanning document size sensor 1
Reflection type
Detects the main scanning document
size.
size.
SEL_ANIN_2
Main scanning document size sensor 2
Reflection type
Detects the main scanning document
size.
size.
Signal name
Name
Type
Function / Operation
Active condition
Note
MX-M1204 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 8
SEL_ANIN_4
Main scanning document size sensor 4
Reflection type
Detects the main scanning document
size.
size.
SEL_IN_5
Sub scanning document size sensor 5
Reflection type
Detects the sub scanning document
size.
size.
SEL_IN_6
Sub scanning document size sensor 6
Reflection type
Detects the sub scanning document
size.
size.
SEL_IN_7
Sub scanning document size sensor 7
Reflection type
Detects the sub scanning document
size.
size.
SEL_IN_8
Sub scanning document size sensor 8
Reflection type
Detects the sub scanning document
size.
size.
SLCOV
DSPF lower door open/close sensor
Transmission
type
type
Detects open/close of the lower door.
L when the lower door is open.
SPED
DSPF document empty sensor
Reflection type
Detects document empty on the
document tray.
document tray.
L when paper is detected.
SPLS1
DSPF document length detection short
sensor
sensor
Transmission
type
type
Detects the length of the document on
the document tray.
the document tray.
H when paper is detected.
SPLS3
DSPF document length detection1 long
sensor
sensor
Transmission
type
type
Detects the length of the document on
the document tray.
the document tray.
H when paper is detected.
SPOD
DSPF paper exit sensor
Reflection type
Detects document pass.
L when paper is detected.
SPPD1
DSPF document pass sensor 1
Reflection type
Detects document pass.
L when paper is detected.
SPPD2
DSPF document pass sensor 2
Reflection type
Detects document pass.
L when paper is detected.
SPPD3
DSPF document pass sensor 3
Reflection type
Detects document pass.
L when paper is detected.
SPPD4
DSPF document pass sensor 4
Reflection type
Detects document pass.
L when paper is detected.
SPPD5
DSPF document pass sensor 5
Reflection type
Detects document pass.
L when paper is detected.
SPPD6
DSPF document pass sensor 6
Reflection type
Detects document pass.
L when paper is detected.
SPPD7
DSPF document pass sensor 7
Reflection type
Detects document pass.
L when paper is detected.
SPRDMD1
DSPF document random sensor
Reflection type
Detects the paper size in random paper
feed.
feed.
L when paper is detected.
SPWS
DSPF document width sensor
Volume resistor
Detects the width of the document.
SOCD
DSPF upper door open/close sensor
Transmission
type
type
Detects open/close of the upper door.
L when the upper door is open.
STLD
DSPF document tray lower limit sensor
Transmission
type
type
Detects the lower limit of the DSPF
document tray.
document tray.
H when the lower limit is
detected.
detected.
STUD
DSPF document tray upper limit sensor
Transmission
type
type
Detects the upper limit of the DSPF
document tray.
document tray.
H when the upper limit is
detected.
detected.
T1LUD
Cassette 1 upper limit detection
Photo
interrupter
interrupter
Detects lift up of the cassette 1 and
paper presence.
paper presence.
PWB
unit
unit
T1PED
Cassette 1 paper presence detection
Photo
interrupter
interrupter
T1PFD
Cassette 1 paper entry detection
Reflection type
Detects the cassette 1 paper pass.
T1PPD1
Cassette 1 transport detection 1
Reflection type
Detects the cassette 1 paper transport.
T1PPD2
Cassette 1 transport detection 2
Reflection type
Detects the cassette 1 paper transport.
T1SPD
Cassette 1 remaining quantity detection
Transmission
type
type
Detects the cassette 1 remaining
quantity.
quantity.
T2LUD
Cassette 2 upper limit detection
Photo
interrupter
interrupter
Detects lift up of the cassette 2.
PWB
unit
unit
T2PED
Cassette 2 paper presence detection
Photo
interrupter
interrupter
Detects the cassette 2 paper presence.
PWB
unit
unit
T2PFD
Cassette 2 paper entry detection
Reflection type
Detects the cassette 2 paper pass.
T2SPD
Cassette 2 remaining quantity detection
Transmission
type
type
Detects the cassette 2 remaining
quantity.
quantity.
TANSET
Tandem presence detection
Transmission
type
type
Detects insertion of the tandem tray.
TCS
Toner density sensor
Permeability
sensor
sensor
Detects the toner density.
TFSD
Toner hopper remaining quality sensor
Permeability
detection
detection
Toner remaining quantity detection
signal
signal
TNBOX
Toner collection container presence
detection
detection
Transmission
type
type
Detects presence of the toner collection
container.
container.
TNF
Toner collection container full detection
Transmission
type
type
Detects the toner collection container
full.
full.
VPPD
Vertical transport detection
Reflection type
Detects paper transport in the vertical
transport path.
transport path.
WEBEND1
Web end detection
Transmission
type
type
Detects the web end.
WEBSPD
Web near end detection
Transmission
type
type
Detects the web near end.
Signal name
Name
Type
Function / Operation
Active condition
Note
6
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6
MX-M1204 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 9
F. Switches
Signal name
Name
Type
Function / Operation
DHSW
Dehumidifying heater switch
Seesaw switch
Turns ON/OFF the power of the dehumidifying heater.
DSW-F
Front door switch
Micro switch
Detects open/close of the front door.
MSW
Main switch
Rocker switch
Turns ON/OFF the power of the machine.
MSW
DSW-F
DHSW
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