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Model
MX-6500N MX-7500N (serv.man27)
Pages
53
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8.03 MB
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PDF
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Service Manual
Brand
Device
Copying Equipment / Section 13 Operational Descriptions
File
mx-6500n-mx-7500n-sm27.pdf
Date

Sharp MX-6500N / MX-7500N (serv.man27) Service Manual ▷ View online

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
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
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
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
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
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.
When, however, documents of different sizes are mixed and set on
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.
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
SPOM
DSPF document exit motor
SPUM
DSPF document feed motor
SPFC
DSPF document feed clutch
DSPF No.1 registration roller 
clutch
STRRC
STRC
DSPF transport roller clutch
SRRC
DSPF No.2 registration roller 
clutch
SPRDMD
DSPF document random sensor
SPOD
DSPF document exit sensor
SPPD4
DSPF document pass sensor 4
SPPD5
DSPF document pass sensor 5
SPPD1
DSPF document pass sensor 1
DSPF document pass sensor 2
SPPD2
SPPD3
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
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)
ON simultaneously with SPPD2_ON
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
1
0
1
1
MX-7500N  OPERATIONAL DESCRIPTIONS  13 – 9
3. Scanner section
A. Electrical and mechanical relation diagram
Signal name
Name
Function/Operation
CLFM
Scanner cooling fan
Cools the scanner unit.
CLI
Scanner lamp
Radiates light onto a document for the CCD to scan the document image.
MHPS
Scanner home position sensor
Detects the home position of the copy lamp unit.
MIM
Scanner motor
Drives the copy lamp unit and the mirror base unit.
 No.
Name
Function/Operation
1
CCD PWB
Scans document images and performs A/D conversion of the scanning signal.
2
SCU PWB
Controls the scanner and the operation section.
3
Scanner lamp drive PWB
Drives the scanner lamp.
4
Lens
Shrinking the image (light) of the document, and project it on CCD.
5
No. 1 mirror
Reflects the document image into the lens.
6
No. 2 mirror
7
No. 3 mirror
8
Reflector
Converges scanner lamp lights to radiate onto the document.
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