Read Sharp MX-6500N / MX-7500N (serv.man27) Service Manual online
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 5
(3)
Lower transport section
Signal name
Name
Function/Operation
SPFM
DSPF transport motor
Drives the transport roller.
SPPD3
DSPF document pass sensor 3
Detects pass of the document.
SPPD4
DSPF document pass sensor 4
Detects pass of the document.
SPPD5
DSPF document pass sensor 5
Detects pass of the document.
SRRC
DSPF No.2 registration roller clutch
Controls ON/OFF of No. 2 registration roller.
No.
Name
Function/ Operation
1
No. 2 registration roller (Drive)
Make synchronization between the lead edge of a document and the scan start position.
2
Platen roller
A pressure is applied to document to prevent fluctuations of document.
3
Transport roller 2 (Drive)
Transports document from the platen roller to the transport roller 3.
4
Transport roller 3 (Drive)
Transports document from the transport roller 2 to the document exit roller.
SPFM
SRRC
SPPD5
SPPD4
SPPD3
24V_TR
D_SPFM
B
D_SPF
M/B
/D_STMP
24V_TR
/D_STRRBC
24V_TR
/D_STRRC
1
SGND
D_STSET
24V_TR
PGND
F
AN_LOCK
NC(
F
A
N
_PWM)
_PWM)
/D_SRRC
/D_SRRC
24V_TR
24V_TR
D_SPF
M/A
D_SPF
MA
24V_SPF
M
6
7
8
/D_SRRBC
24V_TR
CN
9
24V_SPF
M
3
4
5
2
SM
P-0
6
V
-N
C
C
SMR-0
6
V
-N
13
14
15
16
9
10
11
12
19
20
NC
24V_TR
NC
NC
/D_STRC
23
24
17
18
25
26
27
28
NC
21
22
B
2
8
B-PHDSS-B
1
D_
SPFM
SPFM
B
1
2
D_
SPF
SPF
M/B
2
3
D_
SPF
SPF
M/A
3
4
D_
SPF
SPF
MA
4
5
24V_
SPF
M
5
6
24V_
SPF
M
6
P
H
NR-03-H+B
U03P-TR-P-H
P
H
NR-03-H
21
22
23
24
25
26
B
2
6
B-PHDSS-B
P
GND
20
21
22
23
16
17
18
19
12
13
14
15
5
6
7
6
10
12
8
9
10
11
24
25
26
12
13
14
15
16
17
18
19
4
5
6
7
8
9
10
D_
SPO
SPO
M_
DIR
11
4
SGND
1
2
3
C
N2
DSPF CNT PWB
2
B
2
6
B
-PHDSS-B
20
24V
PG
N
D
24V
PG
N
D
24V
P
GND
5V
3
3
2
1
D_
SPU
SPU
M_IN/B
D_SLUMA
D_
SPO
SPO
M_ENA
D_
SPO
SPO
M_
STEP
D_
SPO
SPO
M_
MODE
2
D_SPPD5
D_SULM/A
D_SLUMB
D_SLUM/B
D_SPOD
D_
SPU
SPU
M_INA
D_
SPU
SPU
M_IN/A
D_
SPU
SPU
M_INB
D_
SPU
M_INA
SGND
D_SPPD1
D_
SPU
M_IN/A
D_SOCV
D_SPOD
D_
SPU
M_INB
D_
SPU
M_IN/B
D_SLUMA
D_SULM/A
D_SLUMB
D_SLUM/B
D_
SPO
M_ENA
D_
SPO
M_
STEP
STEP
D_
SPO
SPO
M_
MODE
P
GND
24V
D_
SPO
M_
DIR
24V
P
GND
24V
5V
SGND
D_SPFF
AN
SGND
D_SPPD1
D_RANDOM
D_SOCV
D_SPPD3
SGND
D_SOCD
GND
5V
5V
5V
5V(sensor)
D_SPPD4
D_SPPD5
GND
D_SPPD2
D_SPPD3
GND
5V
DRIVER PWB
D_RANDOM
1
2
3
4
CN
8
SGND
D_SPFF
AN
5V
GND
D_R
OCD
5
7
9
11
17
5V(sensor)
GND
GND
1
14
16
18
15
1
2
3
8
CN
1
B
1
8
B
-PHDSS-B
1
13
3
5V
B3B-PH-K-S
1
SGND
2
3
5V
D_SPPD4
2
3
5V
D_SPPD5
B3B-PH-K-S
B3B-PH-K-S
1
SGND
2
1
2
1
PHNR-02-H
PHNR-02-H+B
U02P-TR-P-H
7
2
3
4
5
6
1
19
18
17
16
15
14
13
12
11
10
9
8
20
26
25
24
23
22
21
27
28
CN-3
B28B-PHDSS-B
D_SPUM_VREF
D_SPFM_VREF
D_SPOM_VREF1
D_SPOM_VREF2
D_SELA
D_SELB
D_SELC
D_SELOUT
3.3V
D_SPWS
A
GND
D_SPFC
D_SRRC
D_SRRBC
D_SPFM_M1
D_SPFM_M2
D_SPFM_CLK
D_SPFM_DIREC
D_STRRC
D_STRRBC
D_STMPS
/D_STRC
5V
SGND
5VPWM
SPED
5V0
SGND
(NC)
(NC)
7
2
3
4
5
6
1
19
18
17
16
15
14
13
12
11
10
9
8
20
26
25
24
23
22
21
25
28
D_SPUM_VREF
D_SPFM_VREF
D_SPOM_VREF1
D_SPOM_VREF2
D_SELA
D_SELB
D_SELC
D_SELOUT
3.3V
D_SPWS
A
GND
D_SPFC
D_SRRC
D_SRRBC
D_SPFM_M1
D_SPFM_M2
D_SPFM_CLK
D_SPFM_DIREC
D_STRRC
D_STRRBC
D_STMPS
/D_STRC
SGND
5VPWM
SPED
5V0
SGND
5V
27
(NC)
(NC)
B28B-PHDSS-B
CN-3
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