Sharp MX-6500N / MX-7500N (serv.man28) Service Manual ▷ View online
MX-7500N ELECTRICAL SECTION 14 – 41
SC_ACK
SCU communication
(Receive)
(Receive)
SCU communication
(Receive)
(Receive)
–
–
CN22
3
PCU PWB
SCK_LSU
LSUASIC
communication
communication
LSUASIC
communication (Clock)
communication (Clock)
–
–
CN25
4
PCU PWB
SELIN1
Right door PWB
multiplex select signal 1
multiplex select signal 1
Right door PWB
multiplex select signal 1
multiplex select signal 1
–
–
CN12
13
PCU PWB
SELIN2
Right door PWB
multiplex select signal 2
multiplex select signal 2
Right door PWB
multiplex select signal 2
multiplex select signal 2
–
–
CN12
15
PCU PWB
SELIN3
Right door PWB
multiplex select signal 3
multiplex select signal 3
Right door PWB
multiplex select signal 3
multiplex select signal 3
–
–
CN12
17
PCU PWB
SOCD
DSPF open/close
detection signal
detection signal
Detects open/close of
the DSPF unit.
the DSPF unit.
Close
Open
CN1
13
DSPFcnt
SPPD2
DSPF document pass
detection 2
detection 2
Detects paper pass.
Detects
paper pass.
–
CN1
9
DSPFcnt
SPPD3
DSPF document pass
detection 3
detection 3
Detects paper pass.
Detects
paper pass.
–
CN1
11
DSPFcnt
SPPD4
DSPF document pass
detection 4
detection 4
Detects paper pass.
Detects
paper pass.
–
CN1
10
DSPFcnt
SPPD5
DSPF document pass
detection 5
detection 5
Detects paper pass.
Detects
paper pass.
–
CN1
12
DSPFcnt
T1LUD
Casette 1 upper limit
detection
detection
Casette 1 upper limit
detection
detection
Upper limit
–
CN2
9
PCU PWB
T1LUM
Tandem tray 1 lift motor
Tandem tray 1 lift motor
control
control
–
Lift
CN2
3
PCU PWB
T1PED
Tandem tray 1 paper
empty detection
empty detection
Tandem tray 1 paper
empty detection
empty detection
Paper empty
Paper
presence
CN2
11
PCU PWB
T1PPD1
Tandem tray 1 paper
entry detection 1
entry detection 1
Tandem tray 1 paper
entry detection 1
entry detection 1
Paper
presence
Paper empty
CN2
16
PCU PWB
T1PPD2
Tandem tray 1 paper
entry detection 2
entry detection 2
Tandem tray 1 paper
entry detection 2
entry detection 2
Paper
presence
–
CN2
22
PCU PWB
T1PUC
Tandem tray 1 paper
feed clutch
feed clutch
Tandem tray 1 paper
feed clutch control
feed clutch control
Clutch ON
–
CN15
1
PCU PWB
T1PUS
Tandem tray 2 paper
feed pickup solenoid
feed pickup solenoid
Tandem tray 2 paper
feed pickup solenoid
control
feed pickup solenoid
control
Solenoid ON
–
CN2
4
PCU PWB
T1SPD
Tandem tray 1 paper
remaining quantity
detection
remaining quantity
detection
Tandem tray 1 paper
remaining quantity
detection
remaining quantity
detection
–
–
CN2
15
PCU PWB
3-step
remaining
quantity
detection
according to
cassette lifting
(L to H to L)
remaining
quantity
detection
according to
cassette lifting
(L to H to L)
T2LUD
Casette 2 upper limit
detection
detection
Casette 2 upper limit
detection
detection
Upper limit
CN2
10
PCU PWB
T2LUM
Casette 2 lift motor
Casette 2 lift motor
control
control
Motor ON
CN15
23
PCU PWB
T2PED
Tandem tray 2 paper
empty detection
empty detection
Tandem tray 2 paper
empty detection
empty detection
Paper empty
Paper
presence
CN2
12
PCU PWB
T2PPD1
Tandem tray 2 transport
detection
detection
Tandem tray 2 transport
detection
detection
Paper
presence
–
CN6
11
PCU PWB
T2PUC
Tandem tray 2 paper
feed clutch
feed clutch
Tandem tray 2 paper
feed clutch control
feed clutch control
Clutch ON
–
CN15
5
PCU PWB
T2PUS
Casette 2 pickup
solenoid
solenoid
Casette 2 pickup
solenoid control
solenoid control
Solenoid ON
–
CN15
19
PCU PWB
T2SPD
Tandem tray 2 paper
remaining quantity
detection
remaining quantity
detection
Tandem tray 2 paper
remaining quantity
detection
remaining quantity
detection
–
–
CN2
21
PCU PWB
3-step
remaining
quantity
detection
according to
cassette lifting
(L to H to L)
remaining
quantity
detection
according to
cassette lifting
(L to H to L)
TBFM_LD
Toner bottle fan lock
detection
detection
Toner bottle fan motor
lock detection
lock detection
Normal
rotation
state
–
CN12
4
PCU PWB
TBFM_V
Toner bottle fan ON/OFF
Toner bottle fan motor
ON/OFF control
ON/OFF control
–
Fan motor
ON
CN12
2
PCU PWB
/TC1_CLK
Primary transfer high
voltage serial clock
voltage serial clock
Primary transfer high
voltage serial clock
signal
voltage serial clock
signal
–
–
CN23
8
PCU PWB
/TC1_DATA
Primary transfer high
voltage serial data
voltage serial data
Primary transfer high
voltage serial data
signal
voltage serial data
signal
–
–
CN23
6
PCU PWB
/TC1_LD
Primary transfer high
voltage serial latch
voltage serial latch
Primary transfer high
voltage serial latch
signal
voltage serial latch
signal
–
–
CN23
10
PCU PWB
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H
MX-7500N ELECTRICAL SECTION 14 – 42
/TC2_CLK
Secondary transfer high
voltage serial clock
voltage serial clock
Secondary transfer high
voltage serial clock
signal
voltage serial clock
signal
–
–
CN12
32
PCU PWB
/TC2_DATA
Secondary transfer high
voltage serial data
voltage serial data
Secondary transfer high
voltage serial data
signal
voltage serial data
signal
–
–
CN12
34
PCU PWB
/TC2_LD
Secondary transfer high
voltage serial latch
voltage serial latch
Secondary transfer high
voltage serial latch
signal
voltage serial latch
signal
–
–
CN12
30
PCU PWB
TCS_C
Toner concentration
sensor C
sensor C
Toner concentration
sensor C detection
sensor C detection
–
–
CN17
14
PCU PWB
Analog
TCS_K
Toner concentration
sensor BK
sensor BK
Toner concentration
sensor BK detection
sensor BK detection
–
–
CN17
7
PCU PWB
Analog
TCS_M
Toner concentration
sensor M
sensor M
Toner concentration
sensor M detection
sensor M detection
–
–
CN17
21
PCU PWB
Analog
TCS_Y
Toner concentration
sensor Y
sensor Y
Toner concentration
sensor Y detection
sensor Y detection
–
–
CN17
28
PCU PWB
Analog
TFD2
Main unit paper exit tray
full detection
full detection
Main unit paper exit tray
full detection
full detection
–
Full state
CN10
13
PCU PWB
TFSD_C
Toner remaining
quantity detection (C)
quantity detection (C)
Toner remaining
quantity detection (C)
quantity detection (C)
Toner empty
state
–
CN21
22
PCU PWB
TFSD_K
Toner remaining
quantity detection (K)
quantity detection (K)
Toner remaining
quantity detection (K)
quantity detection (K)
Toner empty
state
–
CN21
19
PCU PWB
TFSD_M
Toner remaining
quantity detection (M)
quantity detection (M)
Toner remaining
quantity detection (M)
quantity detection (M)
Toner empty
state
–
CN21
25
PCU PWB
TFSD_Y
Toner remaining
quantity detection (Y)
quantity detection (Y)
Toner remaining
quantity detection (Y)
quantity detection (Y)
Toner empty
state
–
CN21
28
PCU PWB
TH1_LSU
LSU thermistor 1
LSU thermistor 1
detection
detection
–
–
CN25
15
PCU PWB
Analog
TH2_LSU
LSU thermistor 2
LSU thermistor 2
detection
detection
–
–
CN25
17
PCU PWB
Analog
TH_LM
Fusing thermistor lower
main non-contact
detection
main non-contact
detection
Fusing thermistor lower
main non-contact
detection
main non-contact
detection
–
–
CN9
19
PCU PWB
Analog
TH_LM2
Fusing thermistor lower
main 2
main 2
Fusing thermistor lower
main 2
main 2
–
–
CN9
29
PCU PWB
Analog
TH_LM_CS
Fusing thermistor lower
main non-contact
compensation
main non-contact
compensation
Fusing thermistor lower
main non-contact
compensation
main non-contact
compensation
–
–
CN9
21
PCU PWB
Analog
TH_M
Temperature sensor
Temperature detection
–
–
CN25
27
PCU PWB
Analog
TH_UM
Fusing thermistor upper
main non-contact
detection
main non-contact
detection
Fusing thermistor upper
main non-contact
detection
main non-contact
detection
–
–
CN9
7
PCU PWB
Analog
TH_UM_CS
Fusing thermistor upper
main non-contact
compensation
main non-contact
compensation
Fusing thermistor upper
main non-contact
compensation
main non-contact
compensation
–
–
CN9
9
PCU PWB
Analog
TH_US
Fusing thermistor upper
sub non-contact
detection
sub non-contact
detection
Fusing thermistor upper
sub non-contact
detection
sub non-contact
detection
–
–
CN9
13
PCU PWB
Analog
TH_US2
Fusing thermistor upper
sub 2
sub 2
Fusing thermistor upper
sub 2
sub 2
–
–
CN9
25
PCU PWB
Analog
TH_US_CS
Fusing thermistor upper
sub non-contact
compensation
sub non-contact
compensation
Fusing thermistor upper
sub non-contact
compensation
sub non-contact
compensation
–
–
CN9
15
PCU PWB
Analog
TNDSET
Tandem tray close
detection
detection
Tandem tray close
detection
detection
Tray open
Tray close
CN6
8
PCU PWB
TRANS_DAT
LSUASIC
communication
communication
LSUASIC
communication (Send)
communication (Send)
–
–
CN25
5
PCU PWB
TRANS_RST
LSUASIC
communication
communication
LSUASIC
communication (Send)
communication (Send)
–
–
CN25
9
PCU PWB
TRC_LCC
LCC communication
LCC communication
–
–
CN4
22
PCU PWB
TSG_C#
Toner density sensor
(ATC) gain
(ATC) gain
Toner density sensor
(ATC) gain control
(ATC) gain control
–
–
CN17
12
PCU PWB
Analog
TSG_K#
Toner density sensor
(ATC) gain
(ATC) gain
Toner density sensor
(ATC) gain control
(ATC) gain control
–
–
CN17
5
PCU PWB
Analog
TSG_M#
Toner density sensor
(ATC) gain
(ATC) gain
Toner density sensor
(ATC) gain control
(ATC) gain control
–
–
CN17
19
PCU PWB
Analog
TSG_Y#
Toner density sensor
(ATC) gain
(ATC) gain
Toner density sensor
(ATC) gain control
(ATC) gain control
–
–
CN17
26
PCU PWB
Analog
TTRC
Tandem transport clutch
Tandem transport clutch
control
control
Clutch ON
–
CN15
9
PCU PWB
/TxD_FIN
Finisher communication
(Send)
(Send)
Finisher communication
(Send)
(Send)
–
–
CN4
7
PCU PWB
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H
MX-7500N ELECTRICAL SECTION 14 – 43
/TxD_LCC
LCC communication
(Send)
(Send)
LCC communication
(Send)
(Send)
–
–
CN4
10
PCU PWB
TXD_OCACIS
CIS unit communication
CIS unit communication
(Send)
(Send)
–
–
CN14
7
PCU PWB
TxD_PCU
ICU communication
ICU communication
(Receive)
(Receive)
–
–
CN22
13
PCU PWB
WEBEND1
Fusing wed end
detection 1
detection 1
Fusing wed end
detection 1
detection 1
–
Wed end
detection
detection
CN9
10
PCU PWB
WEBEND2
Fusing wed end
detection 2
detection 2
Fusing wed end
detection 2
detection 2
–
Wed end
detection
detection
CN9
16
PCU PWB
WH_CNT
Dehumidifier heater
control signal
control signal
Dehumidifier heater
control signal
control signal
Dehumidifier
heater OFF
Dehumidifier
heater ON
CN4
23
PCU PWB
WTBSET
Waste toner box
installation detection
installation detection
Waste toner box
installation detection
installation detection
Waste toner
box installed
–
CN6
3
PCU PWB
WTFD
Waste toner full
detection
detection
Waste toner full
detection
detection
Waste toner
full
–
CN6
5
PCU PWB
WTM_CK
Waste toner motor CLK
Waste toner motor CLK
–
–
CN6
24
PCU PWB
WTM_D
Waste toner motor ON/
OFF
OFF
Waste toner motor ON/
OFF control
OFF control
Motor ON
–
CN6
25
PCU PWB
WTM_LD
Waste toner motor lock
detection
detection
Waste toner motor lock
detection
detection
Motor
normal
rotation
state
–
CN6
22
PCU PWB
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H
MX-7500N ELECTRICAL SECTION 14 – 43
/TxD_LCC
LCC communication
(Send)
(Send)
LCC communication
(Send)
(Send)
–
–
CN4
10
PCU PWB
TXD_OCACIS
CIS unit communication
CIS unit communication
(Send)
(Send)
–
–
CN14
7
PCU PWB
TxD_PCU
ICU communication
ICU communication
(Receive)
(Receive)
–
–
CN22
13
PCU PWB
WEBEND1
Fusing wed end
detection 1
detection 1
Fusing wed end
detection 1
detection 1
–
Wed end
detection
detection
CN9
10
PCU PWB
WEBEND2
Fusing wed end
detection 2
detection 2
Fusing wed end
detection 2
detection 2
–
Wed end
detection
detection
CN9
16
PCU PWB
WH_CNT
Dehumidifier heater
control signal
control signal
Dehumidifier heater
control signal
control signal
Dehumidifier
heater OFF
Dehumidifier
heater ON
CN4
23
PCU PWB
WTBSET
Waste toner box
installation detection
installation detection
Waste toner box
installation detection
installation detection
Waste toner
box installed
–
CN6
3
PCU PWB
WTFD
Waste toner full
detection
detection
Waste toner full
detection
detection
Waste toner
full
–
CN6
5
PCU PWB
WTM_CK
Waste toner motor CLK
Waste toner motor CLK
–
–
CN6
24
PCU PWB
WTM_D
Waste toner motor ON/
OFF
OFF
Waste toner motor ON/
OFF control
OFF control
Motor ON
–
CN6
25
PCU PWB
WTM_LD
Waste toner motor lock
detection
detection
Waste toner motor lock
detection
detection
Motor
normal
rotation
state
–
CN6
22
PCU PWB
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H