Sharp MX-6500N / MX-7500N (serv.man27) Service Manual ▷ View 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
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 6
(4)
Optical section
Signal name
Name
Function/Operation
DSPF COPY LAMP
DSPF copy lamp
Radiates light onto a document to allow the CCD to scan document images.
No.
Name
Function/Operation
1
Reflector
Converges lights from the copy lamp.
2
Mirror
Sends the document image to the lens.
3
Lens
Reduces the document image (light) and reflects it onto the CCD.
4
DSPF CCD PWB
Scans the document image (optical signals) and converts it into electrical signals.
DSPF COPY LAMP
LED PWB
3
4
5
B7B-PH-K-S
IDR
V
5
1
2
IDR
V
1
IDR
V
4
CN5
IDR
V
2
IDR
V
3
6
7
LED_PO
WER
IDR
V
6
DSPF CNT PWB
3
4
5
B7B-PH-K-S
IDR
V5
1
2
IDR
V1
IDR
V4
CN9
IDR
V2
IDR
V3
6
7
L
ED_PO
W
ER
ER
IDR
V6
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 7
(5)
Paper exit section
Signal name
Name
Function/Operation
SPOD
DSPF document exit sensor
Detects document exit of the document.
SPOM
DSPF document exit motor
Drives the document exit roller.
STMPS
Stamp solenoid
Drives the stamp solenoid.
No.
Name
Function/ Operation
1
Document exit roller (Drive)
Discharges document.
SPOD
SPOM
10
B10B-PHDSS-B
SGND
D_SPOMA
4
B4B-PH-K-S
D_SPOMB
5V(sensor)
CN2
3
4
D_SPED2
SGND
3
8
SGND
N C( SGND )
2
5V(sensor)
5V(sensor)
9
5
D_SPOM/B
D_SPOM/A
1
2
D_STLD
1
D_SPOD
6
7
D_SPOD
SGND
5V(sensor)
1
2
CN5
175487-3
DRIVER
PWB
DSPFCNT PWB
3
21
22
23
24
25
26
B 26 B-PHDSS-B
PGND
20
21
22
23
16
17
18
19
12
13
14
15
5
6
7
8
9
10
11
24
25
26
12
13
14
15
16
17
18
19
4
5
6
7
8
9
10
D_SPO M_DIR
11
1
2
3
CN 2
B26 B-PHDSS-B
20
24V
PGND
24V
PGND
24V
PGND
D_SPU M_IN/B
D_SLUMA
D_SPO M_ENA
D_SPO M_STEP
D_SPO M_ MODE
D_SULM/A
D_SLUMB
D_SLUM/B
D_SPOD
D_SPU M_INA
D_SPU M_IN/A
D_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
D_SPO M_ MODE
PGND
24V
D_SPO M_ DIR
24V
PGND
24V
5V
SGND
D_SPFFAN
SGND
D_SPPD1
D_RANDOM
D_SOCV
D_RANDOM
1
2
3
4
CN8
SGND
D_SPFFAN
5V
STMPS
179228-4/29225-4/179228-4
2
4
24V_TR
4
3
/D_STMP
3
1
SGND
1
2
D_STSET
CN9
B28B-PHDSS-B
24V_TR
4
SGND
1
D_STSET
2
/D_STMP
3
7
2
3
4
5
6
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
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
AGND
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
D_SPFM_VREF
D_SPOM_VREF1
D_SPOM_VREF2
D_SELA
D_SELB
D_SELC
D_SELOUT
3.3V
D_SPWS
AGND
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
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
AGND
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
D_SPFM_VREF
D_SPOM_VREF1
D_SPOM_VREF2
D_SELA
D_SELB
D_SELC
D_SELOUT
3.3V
D_SPWS
AGND
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
5VPWM
SPED
5V0
SGND
5V
27
(NC)
(NC)
B28B-PHDSS-B
CN-3
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 8
B. Operational descriptions
(1)
Document size detection
Size detection on the document tray
The document size is detected by the DSPF document width sen-
sor (SPWS), and the document length is detected by the DSPF
document length sensors (SPLS1, SPLS2). The document size is
judged from the document width and the document length as
shown in the table below.
sor (SPWS), and the document length is detected by the DSPF
document length sensors (SPLS1, SPLS2). The document size is
judged from the document width and the document length as
shown in the table below.
When, however, documents of different sizes are mixed and set on
the document tray, the largest size is detected.
the document tray, the largest size is detected.
(2)
Timing chart
To increase the document replacement speed, pre-feed of the second and the later documents is performed for documents of A4/Letter or
smaller sizes. Therefore, a clutch is provided for each transport roller to perform individual control.
smaller sizes. Therefore, a clutch is provided for each transport roller to perform individual control.
Document size
Document length sensor
SPLS1
SPLS2
AB series
A5
OFF
OFF
B5
OFF
OFF
11" x 8.5"
OFF
OFF
A4
OFF
OFF
B5R
ON
OFF
A4R
ON
OFF
8.5" x 13"
ON
ON
B4
ON
ON
A3
ON
ON
11" x 17"
ON
ON
8.5" x 14"
ON
ON
8.5" x 13.4"
ON
ON
8.5" x 13.5"
ON
ON
Inch series
8.5" x 5.5"
OFF
OFF
11" x 8.5"
OFF
OFF
A4
OFF
OFF
11" x 8.5"R
ON
OFF
8.5" x 13"
ON
ON
8.5" x 14"
ON
ON
A3
ON
ON
11" x 17"
ON
ON
8.5" x 13.4"
ON
ON
SPWS
SPLS1
SPLS2
Copy key ON
SPFM
DSPF transport motor
DSPF transport motor
SPOM
DSPF document exit motor
DSPF document exit motor
SPUM
DSPF document feed motor
DSPF document feed motor
SPFC
DSPF document feed clutch
DSPF document feed clutch
DSPF No.1 registration roller
clutch
clutch
STRRC
STRC
DSPF transport roller clutch
DSPF transport roller clutch
SRRC
DSPF No.2 registration roller
clutch
DSPF No.2 registration roller
clutch
SPRDMD
DSPF document random sensor
DSPF document random sensor
SPOD
DSPF document exit sensor
DSPF document exit sensor
SPPD4
DSPF document pass sensor 4
DSPF document pass sensor 4
SPPD5
DSPF document pass sensor 5
DSPF document pass sensor 5
SPPD1
DSPF document pass sensor 1
DSPF document pass sensor 1
DSPF document pass sensor 2
SPPD2
SPPD3
DSPF document pass sensor 3
DSPF document pass sensor 3
Scan transport speed 372mm/s 400dpi letter single transport
ON simultaneously with print start of each motor
OFF at 500ms after SPOD OFF of the last paper
OFF at 500ms after SPOD OFF of the last paper
Decelerates simultaneously with turning off SPOD to
reduce to 200mm/s for 18.9mm. Drives for 15mm,
and returns to 372mm/s for 18.9mm.
(Common to all the paper sizes)
reduce to 200mm/s for 18.9mm. Drives for 15mm,
and returns to 372mm/s for 18.9mm.
(Common to all the paper sizes)
ON simultaneously with SPPD2_ON
OFF at
OFF at
25.7
ms after SPPD2_OFF
ON at 12.3mm - 10ms (29ms) after SPPD3 ON (SIM adjustment)
OFF at 10.4mm (28ms) after SPPD3 OFF
OFF at 10.4mm (28ms) after SPPD3 OFF
1
0
1
1
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