Read Sharp MX-6500N / MX-7500N (serv.man28) Service Manual 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
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