Read Sharp AR-SP2 (serv.man2) Service Manual online
[5] OPERATIONAL DESCRIPTION
1. Paper feed section major parts
No.
Part name
Operation
1
Document length
sensor (L2)
sensor (L2)
Detects the document length on
the tray.
the tray.
2
Document length
sensor (L1)
sensor (L1)
Detects the document length on
the tray.
the tray.
3
Document length
sensor (W0)
sensor (W0)
Detects the presence of
document.
document.
4
Document width sensor
(W1, W2, W3)
(W1, W2, W3)
Detects the document width.
5
Pickup roller
Picks up the document.
6
Paper feed roller
Feed and transport the
document.
document.
7
Paper entry sensor
(PAPER)
(PAPER)
Detects the document transport.
8
PS roller
Makes synchronization between
the document lead edge and the
image lead edge.
the document lead edge and the
image lead edge.
9
PS follower roller
Makes synchronization between
the document lead edge and the
image lead edge.
the document lead edge and the
image lead edge.
10
Transport roller
Transports the document.
11
Transport follower roller
Transports the document.
12
Paper exit follower roller
Discharges the document.
13
Paper exit roller
Discharges the document.
2. Brief descriptions of operations
3. Document size detection
Document size detection by document set tray
When a document is set on the document set tray in the auto mode
of paper/copy magnification ratio selection, the document size is
detected to perform the auto selection function of paper and the copy
magnification ratio according to the detected document size.
of paper/copy magnification ratio selection, the document size is
detected to perform the auto selection function of paper and the copy
magnification ratio according to the detected document size.
When documents of different sizes are mixed and set on the tray, the
max. size is detected. The document width is detected by the docu-
ment width sensors (W1, W2, W3), and the document length is
detected by the document length sensors (L1, L2) to determine the
document size.
max. size is detected. The document width is detected by the docu-
ment width sensors (W1, W2, W3), and the document length is
detected by the document length sensors (L1, L2) to determine the
document size.
The document size judgment is made after a certain time from when
the document set sensor (W0) detects the document.
the document set sensor (W0) detects the document.
Document size
and set direction
Document width
sensor
Document
length sensor
W1
W2
W3
L1
L2
AB
series
A5
F
D
D
D
D
B5
F
F
D
D
D
A5R
D
D
D
D
D
A4
F
F
F
D
D
B5R
D
D
D
F
D
A4R
F
D
D
F
D
8.5"
×
13"
F
D
D
F
F
B4
F
D
D
F
F
A3
F
F
F
F
F
Inch
series
8.5"
×
5.5"
F
D
D
D
D
8.5"
×
5.5"R
D
D
D
D
D
11"
×
8.5"
F
F
F
D
D
11"
×
8.5"R
F
D
D
F
D
8.5"
×
13"
F
D
D
F
F
8.5"
×
14"
F
D
D
F
F
11"
×
17"
F
F
F
F
F
[Note] Sensor ON:
F
OFF:
D
1
2
3,4 5
6
8
9
10
11
12
13
7
1) Document set (Document set sensor ON)
3) Copy start (Machine)
4) SPF motor ON
5) Pickup solenoid ON
6) Pickup roller rotation
7) Paper feed roller rotation
8) Paper entry sensor detects paper presence.
9) PS roller rotation
10) Copy operation (Machine)
11) Transport roller rotation
12) Paper exit roller rotation
13) Document exit
YES
14) Next document
NO
2) Document size detection (The document width is detected
with document width sensors W1, W2, and W3, and the
document length is detected with document length sensors
L1 and L2.)
with document width sensors W1, W2, and W3, and the
document length is detected with document length sensors
L1 and L2.)
15) SPF motor OFF
L2
L1
W1
W0
W2
W3
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