Sharp MX-5500N / MX-6200N / MX-7000N (serv.man55) Service Manual ▷ View online
MX-7000N DSPF SECTION C – 7
2. Operational descriptions
A. Document size detection
Size detection on the document tray
The document width is detected by the DSPF document width sensor (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 width is detected by the DSPF document width sensor (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.
B. 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. An electromagnetic brake is provided for
each transport roller in order to reduce loads to the motor in comparison with a mechanical brake.
smaller sizes. Therefore, a clutch is provided for each transport roller to perform individual control. An electromagnetic brake is provided for
each transport roller in order to reduce loads to the motor in comparison with a mechanical brake.
Document size
Document length sensor
SPLS1
SPLS2
AB series
A5
OFF
OFF
B5
OFF
OFF
11" ✕ 8.5"
OFF
OFF
A4
OFF
OFF
B5R
ON
OFF
A4R
ON
OFF
8.5" ✕ 13"
ON
ON
B4
ON
ON
A3
ON
ON
11" ✕ 17"
ON
ON
Inch series
8.5" ✕ 5.5"
OFF
OFF
11" ✕ 8.5"
OFF
OFF
A4
OFF
OFF
11" ✕ 8.5"R
ON
OFF
8.5" ✕ 13"
ON
ON
8.5" ✕ 14"
ON
ON
A3
ON
ON
11" ✕ 17"
ON
ON
SPWS
SPLS1
SPLS2
ON simultaneously with print start of each motor
OFF at 500ms after SPCD of the last paper
SPFC
DSPF paper feed clutch
DSPF paper feed clutch
SPFC
DSPF paper feed clutch
DSPF paper feed clutch
SPUM
DSPF paper feed motor
DSPF paper feed motor
SPFM
Timer from ON
Timer from ON
DSPF transport motor
SPFFAN
DSPF cooling fan motor
DSPF cooling fan motor
SPPD4
STRC
DSPF transport roller clutch
DSPF transport roller clutch
SRRC
DSPF No.2 resist roller clutch
DSPF No.2 resist roller clutch
SPOD
DSPF paper exit sensor
DSPF paper exit sensor
SPOM
DSPF paper exit motor
DSPF paper exit motor
OC scanner scanning
Built-in scanner scanning
DSPF paper pass sensor 4
SPPD5
DSPF paper pass sensor 5
DSPF paper pass sensor 5
DSPF No.2 resist roller brake clutch
SRRBC
STRRBC
SPRDMD
SPPD1
DSPF paper pass sensor 1
DSPF paper pass sensor 1
DSPF paper pass sensor 2
SPPD2
SPPD3
DSPF paper pass sensor
DSPF paper pass sensor
DSPF random sensor 1
DSPF No.1 resist roller brake clutch
DSPF No.1 resist roller cluch
STRRC
39.3mm
37.6mm
12.3mm
11.8mm
Reduces the speed simultaneously with SPOD OFF,
reduces the speed up to 1855PPS in 15.7mm.
Scanning start at 39.3mm (125ms) from
SPPD5 ON (SIM adjustment)
SPPD5 ON (SIM adjustment)
Scanning start at 37.6mm (120ms) from
SPPD4 ON (SIM adjustment)
SPPD4 ON (SIM adjustment)
ON simultaneously with SPPD3 ON
OFF at 10ms before SRRC ON
OFF at 10ms before SRRC ON
ON at 12.3mm - 10ms (29ms) after SPPD3 ON
(SIM adjustment)
OFF at 11.8mm (38ms) after SPPD3 OFF
(SIM adjustment)
OFF at 11.8mm (38ms) after SPPD3 OFF
ON simultaneously with SPPD2_ON
OFF at 69.4ms after SPPD2_OFF
OFF at 69.4ms after SPPD2_OFF
(Common to each paper size)
Transport speed 314mm/s Letter single-surface transport
Copy key ON
MX-7000N DSPF SECTION C – 8
3. Disassembly and assembly
A. Exterior section
(1) DSPF unit
1)
Remove the upper cabinet rear cover. (Refer to the "[A]
EXTERNAL OUTFIT".)
EXTERNAL OUTFIT".)
2)
Remove the screw (A), and remove the earth wire (B). Discon-
nect the connector (C), and remove the snap band (D).
Remove the screw (E). Disengage the pawl (F), and pass the
cover (G) under the harness (H), and remove it.
nect the connector (C), and remove the snap band (D).
Remove the screw (E). Disengage the pawl (F), and pass the
cover (G) under the harness (H), and remove it.
3)
Loosen the screws (I), and lower the angle adjustment plate
(J).
(J).
4)
Open the DSPF unit (K) to put it straight up, and remove the
screws (L).
screws (L).
Section
Page
A
Exterior section
C - 8
B
Paper feed section
C -11
C
Upper transport section
C -17
D
Lower transport section
C -19
E
Optical section
C -25
F
Paper exit section
C -31
G
Drive section
C -32
H
Others
C -35
Unit
Parts
Page
1
DSPF unit
a
Front cabinet
C - 9
b
Rear cabinet
C - 9
c
Paper feed cover
C -10
d
Upper door
C -10
Unit
1
DSPF unit
1
1-a
1-d
1-c
1-b
1
A
D
C
B
G E
E
F
H
I
I
J
K
L
L
MX-7000N DSPF SECTION C – 9
5)
Slide the DSPF unit (K) to the rear side, and fit the step screw
(M) with the key hole (N) of the hinge, and lift it up to remove.
(M) with the key hole (N) of the hinge, and lift it up to remove.
a. Front cabinet
1)
Open the upper door (A), and remove the screw (B).
2)
Disengage the pawls (C, D, E, F), and remove the front cabinet
(G).
(G).
b. Rear cabinet
1)
Open the upper door (A).
Unit
Parts
1
DSPF unit
a
Front cabinet
K
M
N
1
1-a
A
B
Unit
Parts
1
DSPF unit
b
Rear cabinet
C
D
E
F
G
1-a
1-b
A
MX-7000N DSPF SECTION C – 10
2)
Remove the screws (B). Disengage the pawls (C, D), and
remove the rear cabinet (E).
remove the rear cabinet (E).
c. Paper feed cover
1)
Open the upper door (A).
2)
Remove the screw (B), and remove the paper feed cover (C).
d. Upper door
1)
Remove the front cabinet. (Refer to the "a. Front cabinet".)
2)
Remove the spring (A). Disengage the pawl (B), and remove
the pressure release axis holder (C). Remove the screw (D),
and remove the pressure release link lever (E).
the pressure release axis holder (C). Remove the screw (D),
and remove the pressure release link lever (E).
Unit
Parts
1
DSPF unit
c
Paper feed cover
B
B
B
C
D
E
1-b
1-c
A
Unit
Parts
1
DSPF unit
d
Upper door
B
C
1-c
1-d
A
B
C
D
E
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