Read Sharp AL-1622 (serv.man7) Service Manual online
AL-1611/AL-1622
EXTERNAL VIEWS AND INTERNAL STRUCTURE
4 – 6
7. SPF UNIT <AL-1622 ONLY>
[Sensors and detectors]
8. PAPER FEED SECTION <AL-1622 ONLY>
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No.
Code
Name
Type
Function, operation
1
W0
Document set sensor
Photo transmission
Document presence detection
2
COVER
Open/close sensor
Photo transmission
Paper feed unit open/close detection
3
W1
Document sensor (A4R, LTR, A5)
Photo transmission
Tray document width detection
4
W2
Document width sensor (B4R, B5)
Photo transmission
Tray document width detection
5
W3
Document width sensor (WLTR, A5R, A4, LT)
Photo transmission
Tray document width detection
6
PSOL
Pickup solenoid
—
—
7
PAPER
Paper entry sensor
Photo transmission
Document presence detection
9
CLH
Transport clutch
—
—
10
MOT
SPF motor
Stepping motor
Tray paper feed, transport, paper exit roller drive
12
—
Interface PWB
—
SPF control and communication with the copier body
13
L1
Document length detection SW (Short)
Photo transmission
Tray document length detection
14
L2
Document length detection SW (Long)
Photo transmission
Tray document length detection
15
COVER OPEN
Book sensor
Photo transmission
Detects SPF floating.
No.
Name
Operation
1
Document length sensor (L2)
Detects the document length on the tray.
2
Document length sensor (L1)
Detects the document length on the tray.
3
Document length sensor (W0)
Detects the presence of document.
4
Document width sensor (W1, W2, W3)
Detects the document width.
5
Pickup roller
Picks up the document.
6
Paper feed roller
Feed and transport the document.
7
Paper entry sensor (PAPER)
Detects the document transport.
8
PS roller
Makes synchronization between 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.
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.
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2
3,4
5
6
7
8
9
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