Sharp MX-6500N / MX-7500N (serv.man28) Service Manual ▷ View online
MX-7500N ELECTRICAL SECTION 14 – 33
C4SPD
Cassette 4 paper
remaining quantity
detection
remaining quantity
detection
Cassette 4 paper
remaining quantity
detection
remaining quantity
detection
–
–
CN3
B-14
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)
C4SS1
Cassette 4 paper size
detection 1
detection 1
Cassette 4 paper size
detection 1
detection 1
Size
detection
SW ON
–
CN3
A-2
PCU PWB
C4SS2
Cassette 4 paper size
detection 2
detection 2
Cassette 4 paper size
detection 2
detection 2
Size
detection
SW ON
–
CN3
A-3
PCU PWB
C4SS3
Cassette 4 paper size
detection 3
detection 3
Cassette 4 paper size
detection 3
detection 3
Size
detection
SW ON
–
CN3
A-4
PCU PWB
C4SS4
Cassette 4 paper size
detection 4
detection 4
Cassette 4 paper size
detection 4
detection 4
Size
detection
SW ON
–
CN3
A-5
PCU PWB
CCFT
LCD backlight [CCFT
cool cathode ray tube]
cool cathode ray tube]
LCD backlight
ON
OFF
CN9
21
SCN-
MotherCNT
MotherCNT
CCHPD_C
Charger cleaner home
position (C)
position (C)
Charger cleaner home
position (C) detection
position (C) detection
–
Home
position
detection
CN18
30
PCU PWB
CCHP_C
CCHPD_K
Charger cleaner home
position (K)
position (K)
Charger cleaner home
position (K) detection
position (K) detection
–
Home
position
detection
CN18
20
PCU PWB
CCHP_K
CCHPD_M
Charger cleaner home
position (M)
position (M)
Charger cleaner home
position (M) detection
position (M) detection
–
Home
position
detection
CN20
30
PCU PWB
CCHP_M
CCHPD_Y
Charger cleaner home
position (Y)
position (Y)
Charger cleaner home
position (Y) detection
position (Y) detection
Home
position
detection
CN20
20
PCU PWB
CCHP_Y
CCM_C_A
Charger cleaner motor
phase A (C)
phase A (C)
Charger cleaner motor
phase A (C) control
phase A (C) control
–
–
CN18
25
PCU PWB
CCM_C_B
Charger cleaner motor
phase B (C)
phase B (C)
Charger cleaner motor
phase B (C) control
phase B (C) control
–
–
CN18
26
PCU PWB
CCM_K_A
Charger cleaner motor
phase A (K)
phase A (K)
Charger cleaner motor
phase A (K) control
phase A (K) control
–
–
CN18
15
PCU PWB
CCM_K_B
Charger cleaner motor
phase B (K)
phase B (K)
Charger cleaner motor
phase B (K) control
phase B (K) control
–
–
CN18
16
PCU PWB
CCM_M_A
Charger cleaner motor
phase A (M)
phase A (M)
Charger cleaner motor
phase A (M) control
phase A (M) control
–
–
CN20
25
PCU PWB
CCM_M_B
Charger cleaner motor
phase B (M)
phase B (M)
Charger cleaner motor
phase B (M) control
phase B (M) control
–
–
CN20
26
PCU PWB
CCM_Y_A
Charger cleaner motor
phase A (Y)
phase A (Y)
Charger cleaner motor
phase A (Y) control
phase A (Y) control
–
–
CN20
15
PCU PWB
CCM_Y_B
Charger cleaner motor
phase B (Y)
phase B (Y)
Charger cleaner motor
phase B (Y) control
phase B (Y) control
–
–
CN20
16
PCU PWB
CCMD_C
Charger cleaner shift
detection (C)
detection (C)
Charger cleaner shift
detection (C)
detection (C)
–
–
CN18
22
PCU PWB
Detecting one
rotation by
4 sets of H to L.
rotation by
4 sets of H to L.
CCMD_K
Charger cleaner shift
detection (K)
detection (K)
Charger cleaner shift
detection (K) control
detection (K) control
–
–
CN18
12
PCU PWB
Detecting one
rotation by
4 sets of H to L.
rotation by
4 sets of H to L.
CCMD_M
Charger cleaner shift
detection (M)
detection (M)
Charger cleaner shift
detection (M)
detection (M)
–
–
CN20
22
PCU PWB
Detecting one
rotation by
4 sets of H to L.
rotation by
4 sets of H to L.
CCMD_Y
Charger cleaner shift
detection (Y)
detection (Y)
Charger cleaner shift
detection (Y)
detection (Y)
–
–
CN20
12
PCU PWB
Detecting one
rotation by
4 sets of H to L.
rotation by
4 sets of H to L.
CISFM_LD
CIS Fan lock detection
CIS Fan lock detection
–
–
CN14
23
PCU PWB
CISFM_V
CIS Fan ON/OFF
CIS Fan ON/OFF
–
–
CN14
22
PCU PWB
CL_ON
Scanner lamp
Radiates lights to the
document for the CCD
to scan the document
images.
document for the CCD
to scan the document
images.
ON
OFF
CN7
3
SCN-
MotherCNT
MotherCNT
CN_OCFAN_
LOCK
LOCK
CLFM (OC_FAN) lock CLFM
lock
Normal
operation
Stop
CN1
2
SCN-
MotherCNT
MotherCNT
CNCT_RSVFAN/
FAN_CNCT_HDD
FAN_CNCT_HDD
MFP_FAN/HDD_FAN
lock
lock
Detects the MFP_FAN/
HDD_FAN lock.
HDD_FAN lock.
Normal
operation
Stop
CN1002/
CN1013
CN1013
4/4
SCN-
MotherCNT
MotherCNT
CNCT_SPSFAN
Sub power supply fan
lock
lock
Detects the sub power
supply fan lock.
supply fan lock.
Normal
operation
Stop
CN1015
4
SCN-
MotherCNT
MotherCNT
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H
MX-7500N ELECTRICAL SECTION 14 – 34
CLK_OCACIS
CIS unit communication
CIS unit communication
(Clock)
–
–
CN14
4
PCU PWB
CPFM_CK
Paper feed motor CLK
Paper feed motor CLK
signal
signal
–
–
CN15
12
PCU PWB
CPFM_D
Paper feed motor ON/
OFF
OFF
Paper feed motor ON/
OFF control
OFF control
Motor ON
–
CN15
10
PCU PWB
CPFM_GAIN
Paper feed motor gain
select
select
Paper feed motor gain
select control
select control
–
–
CN15
16
PCU PWB
CPFM_LD
Paper feed motor lock
detection
detection
Paper feed motor lock
detection
detection
Normal
rotation
state
–
CN15
14
PCU PWB
CRM_C_CK
CRUM communication
clock (C)
clock (C)
CRUM communication
clock (C) signal
clock (C) signal
–
–
CN21
7
PCU PWB
CRM_C_DT
CRUM communication
data (C)
data (C)
CRUM communication
data (C) signal
data (C) signal
–
–
CN21
6
PCU PWB
CRM_K_CK
CRUM communication
clock (K)
clock (K)
CRUM communication
clock (K) signal
clock (K) signal
–
–
CN21
3
PCU PWB
CRM_K_DT
CRUM communication
data (K)
data (K)
CRUM communication
data (K) signal
data (K) signal
–
–
CN21
2
PCU PWB
CRM_M_CK
CRUM communication
data (M)
data (M)
CRUM communication
data (M) signal
data (M) signal
–
–
CN21
12
PCU PWB
CRM_M_DT
CRUM communication
clock (M)
clock (M)
CRUM communication
clock (M) signal
clock (M) signal
–
–
CN21
13
PCU PWB
CRM_Y_CK
CRUM communication
data (Y)
data (Y)
CRUM communication
data (Y) signal
data (Y) signal
–
–
CN21
16
PCU PWB
CRM_Y_DT
CRUM communication
clock (Y)
clock (Y)
CRUM communication
clock (Y) signal
clock (Y) signal
–
–
CN21
17
PCU PWB
CTS_PCU
ICU communication
ICU communication
(Send enable)
(Send enable)
–
–
CN22
9
PCU PWB
DEDC_L
Drum encoder
Drum encoder C left
–
–
CN27
11
PCU PWB
DEDC_R
Drum encoder
Drum encoder C right
–
–
CN27
8
PCU PWB
DEDK_L
Drum encoder
Drum encoder K left
–
–
CN27
5
PCU PWB
DEDK_R
Drum encoder
Drum encoder K right
–
–
CN27
2
PCU PWB
DEDM_L
Drum encoder
Drum encoder M left
–
–
CN27
17
PCU PWB
DEDM_R
Drum encoder
Drum encoder M right
–
–
CN27
14
PCU PWB
DEDY_L
Drum encoder
Drum encoder Y left
–
–
CN27
23
PCU PWB
DEDY_R
Drum encoder
Drum encoder Y right
–
–
CN27
20
PCU PWB
DHPD_C
Drum home position (C)
Drum home position (C)
detection
detection
–
Drum
reference
position
CN19
20
PCU PWB
DHPD_K
Drum home position (K)
Drum home position (K)
detection
detection
–
Drum
reference
position
CN18
9
PCU PWB
DHPD_M
Drum home position (M)
Drum home position (M)
detection
detection
–
Drum
reference
position
CN25
9
PCU PWB
DHPD_Y
Drum home position (Y)
Drum home position (Y)
detection
detection
–
Drum
reference
position
CN20
9
PCU PWB
DL2_C
Transfer after-
discharging lamp C
PWM
discharging lamp C
PWM
Transfer after-
discharging lamp C
PWM control
discharging lamp C
PWM control
–
–
CN18
29
PCU PWB
DL2_K
Transfer after-
discharging lamp K
PWM
discharging lamp K
PWM
Transfer after-
discharging lamp K
PWM control
discharging lamp K
PWM control
–
–
CN18
19
PCU PWB
DL2_M
Transfer after-
discharging lamp M
PWM
discharging lamp M
PWM
Transfer after-
discharging lamp M
PWM control
discharging lamp M
PWM control
–
–
CN20
29
PCU PWB
DL2_Y
Transfer after-
discharging lamp Y
PWM
discharging lamp Y
PWM
Transfer after-
discharging lamp Y
PWM control
discharging lamp Y
PWM control
–
–
CN20
19
PCU PWB
DL_C
Discharge lamp C PWM
Discharge lamp C PWM
control
control
–
–
CN18
28
PCU PWB
DL_K
Discharge lamp K PWM
Discharge lamp K PWM
control
control
–
–
CN18
18
PCU PWB
DL_M
Discharge lamp M PWM
Discharge lamp M PWM
control
control
–
–
CN20
28
PCU PWB
DL_Y
Discharge lamp Y PWM
Discharge lamp Y PWM
control
control
–
–
CN20
18
PCU PWB
DM_C_CK
Drum motor CLK (C)
Drum motor CLK (C)
signal
signal
–
–
CN24
14
PCU PWB
DM_C_D
Drum motor ON/OFF
(C)
(C)
Drum motor ON/OFF
(C) control
(C) control
Motor ON
–
CN23
15
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 – 35
DM_C_LD
Drum motor lock
detection (C)
detection (C)
Drum motor lock
detection (C)
detection (C)
Normal
rotation
state
–
CN21
17
PCU PWB
DM_CW/CCW
Drum motor CW/CCW
(K)
(K)
Drum motor CW/CCW
(K) control
(K) control
CCW
CW
CN18
5
PCU PWB
DM_CW/CCW
Drum motor CW/CCW
(C)
(C)
Drum motor CW/CCW
(C) control
(C) control
CCW
CW
CN22
16
PCU PWB
DM_CW/CCW
Drum motor CW/CCW
(M)
(M)
Drum motor CW/CCW
(M) control
(M) control
CCW
CW
CN28
5
PCU PWB
DM_CW/CCW
Drum motor CW/CCW
(Y)
(Y)
Drum motor CW/CCW
(Y) control
(Y) control
CCW
CW
CN20
5
PCU PWB
DM_K_CK
Drum motor CLK (K)
Drum motor CLK (K)
signal
signal
–
–
CN18
3
PCU PWB
DM_K_D
Drum motor ON/OFF (K)
Drum motor ON/OFF
(K) control
(K) control
Motor ON
–
CN18
4
PCU PWB
DM_K_LD
Drum motor lock
detection (K)
detection (K)
Drum motor lock
detection (K)
detection (K)
Normal
rotation
state
–
CN18
6
PCU PWB
DM_M_CK
Drum motor CLK (M)
Drum motor CLK (M)
signal
signal
–
–
CN30
3
PCU PWB
DM_M_D
Drum motor ON/OFF
(M)
(M)
Drum motor ON/OFF
(M) control
(M) control
Motor ON
–
CN29
4
PCU PWB
DM_M_LD
Drum motor lock
detection (M)
detection (M)
Drum motor lock
detection (M)
detection (M)
Normal
rotation
state
–
CN27
6
PCU PWB
DM_Y_CK
Drum motor CLK (Y)
Drum motor CLK (Y)
signal
signal
–
–
CN20
3
PCU PWB
DM_Y_D
Drum motor ON/OFF (Y)
Drum motor ON/OFF
(Y) control
(Y) control
Motor ON
–
CN20
4
PCU PWB
DM_Y_LD
Drum motor lock
detection (Y)
detection (Y)
Drum motor lock
detection (Y)
detection (Y)
Normal
rotation
state
–
CN20
6
PCU PWB
DPF
Double feed detection
Double feed detection
–
Double feed
CN14
15
DPFAin
PDFS analog output
PDFS analog output
–
–
CN14
20
DPFCK
PDFS unit setting
PDFS unit setting
–
–
CN14
17
DSR_FIN
Finisher communication
Finisher communication
(Receive enable)
(Receive enable)
–
–
CN4
13
PCU PWB
/DSR_LCC
LCC communication
LCC communication
(Receive enable)
(Receive enable)
–
–
CN4
16
PCU PWB
DSW_CS
Transport cover open/
close detection
close detection
Transport cover open/
close detection
close detection
Door open
Door close
CN6
20
PCU PWB
DSW_F
Front door open/close
detection
detection
Front door open/close
detection
detection
Door open
Door close
CN11
1
PCU PWB
DSW_FU
Door switch detection
(Front upper door)
(Front upper door)
Door switch detection
(Front upper door)
(Front upper door)
Door open
Door close
CN10
14
PCU PWB
DSW_F
DSW_R
Right door open/close
detection
detection
Right door open/close
detection
detection
Door open
Door close
CN11
4
PCU PWB
DSW_RL
Door switch detection
(Right lower door)
(Right lower door)
Door switch detection
(Right lower door)
(Right lower door)
Door open
Door close
CN6
17
PCU PWB
DTR_FIN
Finisher communication
Finisher communication
(Send enable)
(Send enable)
–
–
CN4
11
PCU PWB
DTR_LCC
LCC communication
LCC communication
(Send enable)
(Send enable)
–
–
CN4
14
PCU PWB
DVC_C
DV clutch (C)
DV clutch (C) control
Clutch ON
–
CN20
18
PCU PWB
DVC_K
DV clutch (K)
DV clutch (K) control
Clutch ON
–
CN18
7
PCU PWB
DVC_M
DV clutch (M)
DV clutch (M) control
Clutch ON
–
CN26
7
PCU PWB
DVC_Y
DV clutch (Y)
DV clutch (Y) control
Clutch ON
–
CN20
7
PCU PWB
DVTYP_C
Development
identification detection C
identification detection C
Development
identification detection
C
identification detection
C
–
–
CN17
11
PCU PWB
Analog
DVTYP_K
Development
identification detection
BK
identification detection
BK
Development
identification detection
BK
identification detection
BK
–
–
CN17
4
PCU PWB
Analog
DVTYP_M
Development
identification detection
M
identification detection
M
Development
identification detection
M
identification detection
M
–
–
CN17
18
PCU PWB
Analog
DVTYP_Y
Development
identification detection Y
identification detection Y
Development
identification detection Y
identification detection Y
–
–
CN17
25
PCU PWB
Analog
DVTYPSEL_C
Development
identification detection C
(digital)
identification detection C
(digital)
Development
identification detection
C (digital)
identification detection
C (digital)
–
–
CN17
9
PCU PWB
DVTYPSEL_K
Development
identification detection K
(digital)
identification detection K
(digital)
Development
identification detection K
(digital)
identification detection K
(digital)
–
–
CN17
2
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 – 36
DVTYPSEL_M
Development
identification detection
M (digital)
identification detection
M (digital)
Development
identification detection
M (digital)
identification detection
M (digital)
–
–
CN17
16
PCU PWB
DVTYPSEL_Y
Development
identification detection Y
(digital)
identification detection Y
(digital)
Development
identification detection Y
(digital)
identification detection Y
(digital)
–
–
CN17
23
PCU PWB
EFM1_CNT
Machine ventilation fan
1 (center) PWM
1 (center) PWM
Machine ventilation fan
motor (center) PWM
control
motor (center) PWM
control
–
–
CN15
22
PCU PWB
EFM1_LD
Machine ventilation fan
1 (center) lock detection
1 (center) lock detection
Machine ventilation fan
1 (center) lock detection
1 (center) lock detection
Normal
rotation
state
CN15
26
PCU PWB
EFM1_V
Machine ventilation fan
1 (center) ON/OFF
1 (center) ON/OFF
Machine ventilation fan
motor (center) ON/OFF
control
motor (center) ON/OFF
control
Fan motor
ON
CN15
20
PCU PWB
EFM2_CNT
Machine ventilation fan
2 (right) PWM
2 (right) PWM
Machine ventilation fan
motor 2 (right) PWM
control
motor 2 (right) PWM
control
–
–
CN23
36
PCU PWB
EFM2_LD
Machine ventilation fan
2 (right) lock detection
2 (right) lock detection
Machine ventilation fan
motor 2 (right) lock
detection
motor 2 (right) lock
detection
Normal
rotation
state
–
CN23
40
PCU PWB
EFM2_V
Machine ventilation fan
2 (right) ON/OFF
2 (right) ON/OFF
Machine ventilation fan
motor 2 (right) ON/OFF
control
motor 2 (right) ON/OFF
control
–
Fan motor
ON
CN23
34
PCU PWB
FAN_24V
LSU cooling fan
(LSUFM) signal
(LSUFM) signal
Drives the cooling fan of
the LSU unit.
the LSU unit.
Stop
Drive
CN500
17
LSU-CNT
FAN_nREADY
LSU cooling fan
(LSUFM) lock signal
(LSUFM) lock signal
Detects lock of the
cooling fan of the LSU
unit.
cooling fan of the LSU
unit.
–
Lock
detection
CN500
18
LSU-CNT
FPFD
Fusing paper entry
detection
detection
Fusing paper entry
detection
detection
Paper
presence
–
CN9
22
PCU PWB
FPRFM1_V
Fusing pressure roller
cooling fan 1 ON/OFF
cooling fan 1 ON/OFF
Fusing pressure roller
cooling fan motor 1 ON/
OFF control
cooling fan motor 1 ON/
OFF control
Fan motor
ON
CN12
14
PCU PWB
FPRFM2_LD
Fusing pressure roller
cooling fan 2 lock
detection
cooling fan 2 lock
detection
Fusing pressure roller
cooling fan motor 2 lock
detection
cooling fan motor 2 lock
detection
Normal
rotation
state
–
CN12
25
PCU PWB
FPRFM2_V
Fusing pressure roller
cooling fan 2 ON/OFF
cooling fan 2 ON/OFF
Fusing pressure roller
cooling fan motor 2 ON/
OFF control
cooling fan motor 2 ON/
OFF control
–
Fan motor
ON
CN12
16
PCU PWB
FRM_OCACIS
CIS unit communication
CIS unit communication
–
–
CN14
3
PCU PWB
FRS
Fusing lower pawl
separation solenoid
separation solenoid
Fusing lower pawl
separation solenoid
control
separation solenoid
control
Solenoid ON
–
CN9
32
PCU PWB
FUFM_CNT
Fusing fan cooling PWM
Fusing fan cooling
motor PWM control
motor PWM control
–
–
CN10
22
PCU PWB
FUFM_LD
Fusing fan cooling lock
detection
detection
Fusing fan cooling
motor lock detection
motor lock detection
Normal
rotation
state
–
CN10
24
PCU PWB
FUFM_V
Fusing fan cooling ON/
OFF
OFF
Fusing fan cooling
motor ON/OFF control
motor ON/OFF control
–
Fan motor
ON
CN10
18
PCU PWB
FUM_CK
Fusing motor CLK
Fusing motor CLK
signal
signal
–
–
CN10
30
PCU PWB
FUM_D
Fusing motor ON/OFF
Fusing motor ON/OFF
control
control
Motor ON
–
CN10
32
PCU PWB
FUM_GAIN
Fusing motor gain
Fusing motor gain
setting
setting
–
–
CN10
26
PCU PWB
FUM_LD
Fusing motor lock
detection
detection
Fusing motor lock
detection
detection
Motor
normal
rotation
state
–
CN10
28
PCU PWB
FW
Zero cross input signal 1
Zero cross input signal 1
–
–
CN4
27
PCU PWB
FW2
Zero cross input signal 2
Zero cross input signal 2
–
–
CN4
32
PCU PWB
GUnD
PDFS unit setting
PDFS unit setting
–
–
CN14
13
PCU PWB
HL_LM
Heater lamp lower main
Heater lamp lower main
control
control
–
Heater lamp
ON
CN23
33
PCU PWB
HL_POW_CNT
Heater AC relay control
Heater AC relay control
–
Relay ON
CN4
24
PCU PWB
/HL_PR
Heater lamp power relay
ON/OFF
ON/OFF
Heater lamp power
relay ON/OFF control
relay ON/OFF control
–
Relay ON
CN23
27
PCU PWB
HL_UM
Heater lamp upper main
Heater lamp upper main
control
control
–
Heater lamp
ON
CN23
29
PCU PWB
HL_US
Heater lamp upper sub
Heater lamp upper sub
control
control
–
Heater lamp
ON
CN23
31
PCU PWB
Signal name
Name [Type]
Function/Operation
Connector level
Connector
No.
Pin
No.
No.
PWB name
NOTE
L
H
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