Sharp MX-1800N (serv.man19) Service Manual ▷ View online
MX-1800N ELECTRICAL SECTION 11 – 29
3. Signal list
Signal
name
Name
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB
name
Note
“L”
“H”
1TNFD
Waste toner full detection
switch [Mechanical switch]
switch [Mechanical switch]
Detects the waste toner full.
Empty
Full
CN9
1
CPU
1TUD_CL
Transfer belt separation CL
detection
detection
Detects the transfer belt
separation CL.
separation CL.
Separation
Contact
CN9
11
PCU
1TUD_K
Transfer belt separation BK
detection
detection
Detects the transfer belt
separation BK.
separation BK.
Separation
Contact
CN9
12
PCU
1TURC
Primary transfer separation
clutch
[Electromagnetic clutch]
clutch
[Electromagnetic clutch]
Controls the primary transfer
separation mode.
separation mode.
Separation
Contact
CN12
14
PCU
ADUM_L
ADU motor lower
[Stepping motor]
[Stepping motor]
Drives the right door section.
—
—
CN23
21, 22,
23, 24
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
APPD1
ADU transport path
detection 1
[Transmission type]
detection 1
[Transmission type]
Detects the duplex (ADU)
upstream paper pass.
upstream paper pass.
Pass
—
CN26
1
PCU
APPD2
ADU transport path
detection 2
[Transmission type]
detection 2
[Transmission type]
Detects the duplex (ADU)
midstream paper pass.
midstream paper pass.
Pass
—
CN26
2
PCU
CCFT1
LCD backlight
[CCFT cool cathode ray tube]
[CCFT cool cathode ray tube]
Backlight for the CCD
ON
OFF
CN125
7
SCU
CLI
Scanner lamp [Xenon lamp]
Radiates lights onto a document
for the CCD to scan document
images.
for the CCD to scan document
images.
ON
OFF
CN130
3
SCU
CLUD1
Tray 1 upper limit detection
(Lift HP detection)
[Transmission type]
(Lift HP detection)
[Transmission type]
Detects tray 1 upper limit .
—
Upper
Limit
CN6
3
PCU
CLUD2
Tray 2 upper limit detection
(Lift HP detection)
[Transmission type]
(Lift HP detection)
[Transmission type]
Detects tray 2 upper limit.
—
Upper
Limit
CN6
4
PCU
CLUM1
Paper tray lift-up motor
(Paper feed tray 1)
[DC brush-less motor]
(Paper feed tray 1)
[DC brush-less motor]
Drives the lift plate of the paper
feed tray.
feed tray.
Motor Stop
Motor
Drive
CN17
6
PCU
CLUM2
Paper tray lift-up motor
(Paper feed tray 2)
[DC brush-less motor]
(Paper feed tray 2)
[DC brush-less motor]
Drives the lift plate of the paper
feed tray.
feed tray.
Motor Stop
Motor
Drive
CN17
8
PCU
CPED1
Tray 1 paper empty detection
[Transmission type]
[Transmission type]
Detects tray 1 paper empty.
Exist
Empty
CN6
5
PCU
CPED2
Tray 2 paper empty detection
[Transmission type]
[Transmission type]
Detects tray 2 paper empty.
Exist
Empty
CN6
6
PCU
CPFC
Tray vertical transport clutch
[Electromagnetic clutch]
[Electromagnetic clutch]
Controls ON/OFF of the paper
transport roller in the paper feed
tray section.
transport roller in the paper feed
tray section.
ON
OFF
C17
11
PCU
CPFD1
Tray 1 transport detection
(Paper entry detection)
[Transmission type]
(Paper entry detection)
[Transmission type]
Detects tray 1 paper pass.
Pass
—
CN6
1
PCU
CPFD2
Tray 2 transport detection
(Paper entry detection)
[Transmission type]
(Paper entry detection)
[Transmission type]
Detects tray 2 paper pass.
Pass
—
CN6
2
PCU
CPFM
Paper feed motor
[Brush-less motor]
[Brush-less motor]
Drives the paper feed section.
Motor
Drive
Motor
Stop
CN17
1
PCU
CPFM LD
CPFM Lock detect
CPFM Lock detect
—
Motor
Lock
CN17
2
PCU
CPUC1
Paper feed clutch
(Paper feed tray 1)
[Electromagnetic clutch]
(Paper feed tray 1)
[Electromagnetic clutch]
Controls ON/OFF of the roller in
the paper feed tray 1 section.
the paper feed tray 1 section.
ON
OFF
CN17
13
PCU
CPUC2
Paper feed clutch
(Paper feed tray 2)
[Electromagnetic clutch]
(Paper feed tray 2)
[Electromagnetic clutch]
Controls ON/OFF of the roller in
the paper feed tray 2 section.
the paper feed tray 2 section.
ON
OFF
CN17
15
PCU
CPUFM
Controller cooling fan motor
Cools the controller PWB.
CSPD1
Tray 1 paper remaining
quantity detection
quantity detection
Detects tray 1 paper remaining
quantity.
quantity.
Remaining
—
CN6
9
PCU
During LiftUp
CSPD2
Tray 2 paper remaining
quantity detection
quantity detection
Detects tray 2 paper remaining
quantity.
quantity.
Remaining
—
CN6
8
PCU
During LiftUp
CSS1
Tray 1 installation detection
Detects the tray 1.
Exist
None
CN6
11
PCU
CSS2
Tray 2 installation detection
Detects the tray 2.
Exist
None
CN6
10
PCU
DHPD_CL
CL phase detection
Detects the CL phase.
—
Standard
CN12
31
PCU
DHPD_K
BK phase detection
Detects the BK phase.
—
Standard
CN12
32
PCU
DL_C
Discharge lamp C [LED]
Discharges electric charges on
the OPC drum.
the OPC drum.
OFF
ON
CN15
21
PCU
DL_K
Discharge lamp K [LED]
Discharges electric charges on
the OPC drum.
the OPC drum.
OFF
ON
CN15
1
PCU
MX-1800N ELECTRICAL SECTION 11 – 30
DL_M
Discharge lamp M [LED]
Discharges electric charges on
the OPC drum.
the OPC drum.
OFF
ON
CN15
2
PCU
DL_Y
Discharge lamp Y [LED]
Discharges electric charges on
the OPC drum.
the OPC drum.
OFF
ON
CN15
22
PCU
DL_K
Discharge lamp K [LED]
Discharges electric charges on
the OPC drum.
the OPC drum.
OFF
ON
CN15
1
PCU
DM_CL
Drum motor (CL)
[Stepping motor]
[Stepping motor]
Drives the color OPC drum unit.
—
—
CN34
17, 18,
19, 20
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
DM_K
Drum motor (K)
[Stepping motor]
[Stepping motor]
Drives the black OPC drum unit.
—
—
CN34
23, 24,
25, 26
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
DSW_ADU
ADU transport open/close
detection [Transmission type]
detection [Transmission type]
Detects the duplex (ADU) cover
open/close.
open/close.
Open
Close
CN2
7
RD I/F
DSW_C
Tray 1 and 2 transport cover
open/close detection
open/close detection
Detects the tray 1 and 2 transport
cover open/close.
cover open/close.
Open
Close
CN6
5
PCU
DSW-F
Front door open/close switch
[Micro switch]
[Micro switch]
Detects open/close of the front
door, and turns ON/OFF the
power line of the fusing motor and
the LSU laser.
door, and turns ON/OFF the
power line of the fusing motor and
the LSU laser.
Open
Close
CN4
4
PCU
DSW-R
Right door open/close switch
[Micro switch]
[Micro switch]
Detects open/close of the right
door, and turns ON/OFF the
power line of the fusing motor and
the LSU laser.
door, and turns ON/OFF the
power line of the fusing motor and
the LSU laser.
Open
Close
CN4
3
PCU
DVM_CL
Developing drive motor (CL)
[Brush-less motor]
[Brush-less motor]
Drives the developing section
(CL).
(CL).
Motor
Drive
Motor
Stop
CN12
11
PCU
DVM_CL
LD
LD
Detect motor lock
Detect motor lock
—
Motor
Lock
CN12
1
PCU
DVM_K
Developing drive motor (K)
[Brush-less motor]
[Brush-less motor]
Drives the developing section/
transfer section (K).
transfer section (K).
Motor
Drive
Motor
Stop
CN12
12
PCU
DVM_K LD
Detect motor lock
Detect motor lock
—
Motor
Lock
CN12
2
PCU
F1
Fuse (20A 125V)
AC power
PWB
PWB
F1
Fuse (200mA 250V)
LCD INV
PWB
PWB
F1
Fuse (1.25A250V)
CL invertor
PWB
PWB
F2
Fuse (20A 125V)
AC power
PWB
PWB
F3
Fuse (T2AH250V)
AC power
PWB
PWB
F4
Fuse (T2AH250V)
AC power
PWB
PWB
F101
Fuse (125V 12A)
DC power
PWB
PWB
F102
Fuse (T1AH250V)
DC power
PWB
PWB
F103
Fuse (T8AH250V)
DC power
PWB
PWB
F201
Fuse (T6.3AH250V)
DC power
PWB
PWB
F202
Fuse (T6.3AH250V)
DC power
PWB
PWB
F203
Fuse (T6.3AH250V)
DC power
PWB
PWB
F204
Fuse (T6.3AH250V)
DC power
PWB
PWB
F205
Fuse (T6.3AH250V)
DC power
PWB
PWB
F301
Fuse (T5AH250V)
DC power
PWB
PWB
FUM
Fusing drive motor
[Stepping motor]
[Stepping motor]
Drives the fusing unit.
—
—
CN23
7, 8, 9,
10
PCU
* Driven by
pulse
function of
4-phase
function of
4-phase
HDDFM
HDD cooling fan motor
Cools the HDD.
HL_LM
Heater lamp lower main
Heats the lower heat roller. (Main)
OFF
ON
CN34
11
PCU
HL_UM
Heater lamp upper main
Heats the upper heat roller.
(Main)
(Main)
OFF
ON
CN34
7
PCU
HL_US
Heater lamp upper sub
Heats the upper heat roller. (Sub)
OFF
ON
CN34
9
PCU
HLTS1
Thermostat (Fusing unit)
Prevents against overheating of
the fusing roller.
the fusing roller.
Signal
name
Name
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB
name
Note
“L”
“H”
MX-1800N ELECTRICAL SECTION 11 – 31
HLTS2
Thermostat (Fusing unit)
Prevents against overheating of
the fusing roller.
the fusing roller.
HLTS3
Thermostat (Fusing unit)
Prevents against overheating of
the fusing roller.
the fusing roller.
HOPS
Shifter home position
detection
detection
Detects the shifter home position.
—
Home
position
CN13
16
PCU
LSUSS1
LSU shutter solenoid
[Electromagnetic solenoid]
[Electromagnetic solenoid]
Opens/closes the LSU shutter.
Open
Close
CN10
4
PCU
MHPS
Scanner home position
sensor [Transmission type]
sensor [Transmission type]
Detects the scanner home
position.
position.
—
Home
position
CN134
1
SCU
MIM
Scanner motor [Stepping
motor]
motor]
Drives the scanner (reading)
section.
section.
—
—
CN137
1, 2, 3,
4
SCU
MPED
Manual feed paper empty
detection [Transmission type]
detection [Transmission type]
Detects the manual feed paper
empty.
empty.
Exist
Empty
CN3
7
RD I/F
MPFD
Manual feed paper entry
detection [Transmission type]
detection [Transmission type]
Detects the manual feed paper
entry.
entry.
Pass
—
CN26
11
PCU
MPFS
Paper pickup solenoid
(Manual paper feed)
[Electromagnetic solenoid]
(Manual paper feed)
[Electromagnetic solenoid]
Paper pickup solenoid (Manual
paper feed)
paper feed)
Paper
pick-up
—
CN26
4
PCU
MPGS
Manual paper feed gate
solenoid
[Electromagnetic solenoid]
solenoid
[Electromagnetic solenoid]
Controls open/close of the
manual paper feed gate solenoid.
manual paper feed gate solenoid.
ON
OFF
CN26
5
PCU
MPLD
Manual feed paper length
detector
detector
Detects the manual paper feed
tray paper length.
tray paper length.
Detect
—
CN3
16
RD I/F
Manual paper
feed unit
feed unit
MPUC
Manual paper feed clutch
[Electromagnetic clutch]
[Electromagnetic clutch]
Controls ON/OFF of the manual
paper feed roller in the manual
paper feed section.
paper feed roller in the manual
paper feed section.
ON
OFF
CN26
6
PCU
MPWD
Manual paper feed tray paper
width detector
[Volume resistor]
width detector
[Volume resistor]
Detects the manual paper feed
tray paper width.
tray paper width.
—
—
CN26
16
PCU
Analog detect
MSW
Main SW [Seesaw switch]
Turns ON/OFF the main DC
power source.
power source.
MTOP1
Manual paper feed tray
pull-out position detector 1
[Transmission type]
pull-out position detector 1
[Transmission type]
Detects the manual paper feed
tray paper pull-out position
(storing position).
tray paper pull-out position
(storing position).
—
Store
CN3
25
RD I/F
Manual paper
feed unit
feed unit
MTOP2
Manual paper feed tray
pull-out position detector 1
[Transmission type]
pull-out position detector 1
[Transmission type]
Detects the manual paper feed
tray paper pull-out position (pull-
out position).
tray paper pull-out position (pull-
out position).
—
Pullout
CN3
22
RD I/F
Manual paper
feed unit
feed unit
OCSW
Original cover SW
[Transmission type]
[Transmission type]
Document size detection trigger.
Close
Open
CN136
3
SCU
OSM
Shifter motor
[Stepping motor]
[Stepping motor]
Performs offset of paper.
—
—
CN13
7, 9,
11, 13
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
OZFM
Ozone fan motor
Exhausts ozone.
Motor Stop
Motor
Drive
CN26
27
PCU
OZFM_
CNT
CNT
OZFM speed control
OZFM speed control
—
—
CN26
29
PCU
Pulse (Duty)
function
function
OZFM LD
OZFM lock detect
OZFM lock detect
—
Motor
Lock
CN26
31
PCU
PCS_CL/K
Process control sensor
[Reflection type]
[Reflection type]
Detects the toner patch density.
—
—
CN17
19, 21
PCU
Analog detect
PCSS
Process control shutter
solenoid
[Electromagnetic solenoid]
solenoid
[Electromagnetic solenoid]
Opens/closes the shutter of the
process control and the
registration sensor.
process control and the
registration sensor.
Open
Close
CN17
17
PCU
PFM
PS front motor
[Stepping motor]
[Stepping motor]
Drives transport between the
resist roller and the paper feed
section, transport between the
resist roller and the right door
section.
resist roller and the paper feed
section, transport between the
resist roller and the right door
section.
—
—
CN23
11, 12,
13, 14
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
PGM
Polygon motor
[DC brushless motor]
[DC brushless motor]
Scans the laser beam.
POD1
Fusing after-detection
[Transmission type]
[Transmission type]
Detects the paper exit from
fusing.
fusing.
—
Pass
CN13
14
PCU
POD2
Paper exit detection
[Transmission type]
[Transmission type]
Detects the paper from paper
exit.
exit.
Pass
—
CN13
12
PCU
POD3
Right tray paper exit
detection
detection
Detects the paper exit to right
tray.
tray.
Pass
—
CN26
14
PCU
POFM_F
Paper exit cooling fan motor
(F side)
(F side)
Cools the fusing unit.
Motor Stop
Motor
Drive
CN13
15
PCU
POFM_R
Paper exit cooling fan motor
(R side)
(R side)
Cools the fusing unit.
Motor Stop
Motor
Drive
CN13
15
PCU
POFM_
CNT
CNT
PORM speed control
PORM speed control
—
—
CN13
17
PCU
Pulse (Duty)
function
function
Signal
name
Name
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB
name
Note
“L”
“H”
MX-1800N ELECTRICAL SECTION 11 – 32
POFM LD1
POFM F Lock detect
POFM F Lock detect
—
Motor
Lock
CN13
21
PCU
POFM LD2
POFM R Lock detect
POFM R Lock detect
—
Motor
Lock
CN13
22
PCU
POM
Paper exit drive motor
[Stepping motor]
[Stepping motor]
Drives the paper exit roller.
—
—
CN23
1, 2, 3,
4
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
PPD1
Registration pre-detection
[Transmission type]
[Transmission type]
Detects the paper in front of resist
roller.
roller.
Pass
—
CN17
31
PCU
PPD2
Registration detection
Detects the paper in rear of resist
roller.
roller.
Pass
—
CN17
32
PCU
PSFM
Power cooling fan motor
Cools the power unit.
Motor Stop
Motor
Drive
CN26
28
PCU
PSCF LD
PSFM Lock detect
PSFM Lock detect
—
Motor
Drive
CN26
30
PCU
PWM
Controller cooling fan motor
HDD cooling fan motor
HDD cooling fan motor
Cools the controller PWB.
Cools the HDD.
Cools the HDD.
OFF
ON
(PWM)
CN21
78
MFPC
PWRSW
Operation panel power switch
[Push switch]
[Push switch]
Outputs the ON/OF control signal
of the DC power source.
of the DC power source.
ON
OFF
CN3
10
MOTHER
REGS_F/R
Resist sensor
[Reflection type]
[Reflection type]
Detects the resist shift.
—
—
CN17
20, 26
PCU
Analog detect
RRM
Registration motor
[Stepping motor]
[Stepping motor]
Drives the resist roller and
controls ON/OFF.
controls ON/OFF.
—
—
CN23
17, 18,
19, 20
PCU
Driven by
pulse function
of 4-phase
pulse function
of 4-phase
TCS_C
Toner density sensor
[Magnetic sensor]
[Magnetic sensor]
Detects the toner density (C).
—
—
CN15
27
PCU
Analog detect
TCS_K
Toner density sensor
[Magnetic sensor]
[Magnetic sensor]
Detects the toner density (K).
—
—
CN15
7
PCU
Analog detect
TCS_M
Toner density sensor
[Magnetic sensor]
[Magnetic sensor]
Detects the toner density (M).
—
—
CN15
8
PCU
Analog detect
TCS_Y
Toner density sensor
[Magnetic sensor]
[Magnetic sensor]
Detects the toner density (Y).
—
—
CN15
28
PCU
Analog detect
TFD2
Paper exit full detection
[Transmission type]
[Transmission type]
Detects the face down paper exit
tray full
tray full
Full
—
CN13
10
PCU
TFD3
Right tray paper exit full
detection
detection
Detects the right tray paper exit
full.
full.
Full
—
CN2
1
RD I/F
TH_M/
HUD_M
HUD_M
Temperature/humidity
detection
detection
Detects the temperature/humidity.
—
—
CN26
17, 19
PCU
Analog detect
TH_UM IN
Thermistor upper main
—
—
CN9
25
PCU
Analog detect
TH_US IN
Thermistor upper sub
—
—
CN9
27
PCU
Analog detect
TH_LM IN
Thermistor lower main
—
—
CN9
29
PCU
Analog detect
TH_UMCS
IN
IN
Thermistor upper main
—
—
CN9
30
PCU
Analog detect
TNM_C
Toner motor C
[Synchronous motor]
[Synchronous motor]
Transports toner from the toner
cartridge to the developing unit.
cartridge to the developing unit.
—
—
CN12
19, 21
PCU
Driven by
pulse function
of two port
pulse function
of two port
TNM_K
Toner motor K
[Synchronous motor]
[Synchronous motor]
Transports toner from the toner
cartridge to the developing unit.
cartridge to the developing unit.
—
—
CN12
15, 17
PCU
Driven by
pulse function
of two port
pulse function
of two port
TNM_M
Toner motor M
[Synchronous motor]
[Synchronous motor]
Transports toner from the toner
cartridge to the developing unit.
cartridge to the developing unit.
—
—
CN12
22, 24
PCU
Driven by
pulse function
of two port
pulse function
of two port
TNM_Y
Toner motor Y
[Synchronous motor]
[Synchronous motor]
Transports toner from the toner
cartridge to the developing unit.
cartridge to the developing unit.
—
—
CN12
18, 20
PCU
Driven by
pulse function
of two port
pulse function
of two port
VR201
Volume
+12V output adjustment
DC power
PWB
PWB
VR203
Volume
+24V output adjustment
DC power
PWB
PWB
VR204
Volume
+5VN output adjustment
DC power
PWB
PWB
VR205
Volume
+3.3V output adjustment
DC power
PWB
PWB
VR402
Volume
+5VO, +5VL output adjustment
DC power
PWB
PWB
WTNM
Waste toner drive motor
[Synchronous motor]
[Synchronous motor]
Stirs waste toner.
—
—
CN9
17, 18
PCU
Driven by
pulse function
of two port
pulse function
of two port
Signal
name
Name
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB
name
Note
“L”
“H”
