Sharp AL-1551 (serv.man4) Service Manual ▷ View online
AL-1551 OPERATIONAL DESCRIPTIONS 7-10
C. Back copy
Document transport:
By switchback operation, the document is sent through the PS roller to
the exposure section, where the back of the document is exposed.
• It is sent to the document exit section by the transport roller and the
paper exit roller.
• R-SPF gate solenoid ON. The document is sent to the intermediate tray,
(but not discharged completely.)
• It is stopped once and switchback operation is performed.
• It is sent through the PS roller and the exposure section (without
exposure operation) to the document exit section.
• R-SPF gate solenoid OFF
• The document is discharged to the document exit tray.
Paper transport:
Switchback operation is performed.
• The paper is sent through the upper side of the gate section and the
duplex transport section, and the PS roller, and the images on the back
are transferred.
• It is sent through the fusing section and discharged to the paper exit
tray.
Switchback operation is made after back copying in order to discharge
documents according to the setting.
Set document Documents after discharge,
There are following job modes as well as D-D mode.
S - S (Simplex to Simplex)
S - S (Simplex to Simplex)
S - D (Simplex to Duplex),
Rotation copy mode (The back images are rotated 180°C.)
S - D (Simplex to Duplex), Copy mode without rotation
D - S (Duplex to Simplex)
Rotation copy mode:
The front and the back are in upside down each other.
Copy mode without rotation:
The front and the back are not in upside down.
Gate ON
Upper Side of Gate
Gate ON
Gate OFF
1
with empty feed
4
without empty feed
3
2
3
4
3
2
1
4
1
2
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AL-1551 DISASSEMBLY AND ASSEMBLY 8-1
[8] DISASSEMBLY AND ASSEMBLY
Before disassembly, be sure to disconnect the power cord for safety.
The disassembly and assembly procedures are described for the
following sections:
following sections:
1. High voltage section
2. Operation panel section
3. Optical section
3. Optical section
4. Fusing section
5. Tray paper feed/transport section
6. Manual paper feed section
6. Manual paper feed section
7. Rear frame section
8. Power section
9. SPF section
9. SPF section
10. 2nd cassette section
11. Duplex motor section
12. Reverse roller section
12. Reverse roller section
13. RSPF section
1. High voltage section
A. List
B. Disassembly procedure
1) Press the side cover open/close button and open the side cover.
2) Push up the lock pawls (2 positions) of the side cover, and remove
the transfer charger.
C. Assembly procedure
For assembly, reverse the disassembly procedure.
D. Charger wire cleaning
1) Remove the charger cleaner from the manual paper feed unit.
No.
Part name Ref.
1
Transfer charger unit
2
Charger wire
1)
2)
2)
1)
1)
Transfer
charger
charger
Lock pawl rear
Lock pawl front
1)
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AL-1551 DISASSEMBLY AND ASSEMBLY 8-2
2) Set the charger cleaner to the transfer unit, and move it reciprocally a
few times in the direction of the arrow shown in the figure below.
E. Charger wire replacement
1) Remove the TC cover and remove the screw.
2) Remove the spring and remove the charger wire.
2) Remove the spring and remove the charger wire.
3) Install a new charger wire by reversing the procedures (1) and (2).
At that time, be careful of the following items.
•The rest of the charger wire must be within 1.5mm. Refer to Fig.1
•The spring hook section (charger wire winding section) must be in the
range of the projection section.
•Be careful not to twist the charger wire.
2. Operation panel section
A. List
B. Disassembly procedure
1) Remove the screws (4 pcs.), the harness, and the operation panel
unit.
2) Remove the screws (3 pcs.) and the PWB holder.
3) Remove the screws (3 pcs.) and the operation PWB.
C. Assembly procedure
For assembly, reverse the disassembly procedure
1)
2)
3)
4)
1mm
1.5mm
Fig.1
1)
1)
2)
3)
Charger wire
Protrusion
No.
Part name Ref.
1
Operation panel unit
2
Operation PWB
1)
2)
3)
1)
1)
4)
3)
1)
2)
3)
3)
Note that there are 13 pawls
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AL-1551 DISASSEMBLY AND ASSEMBLY 8-3
3. Optical section
A. List
B. Disassembly procedure
1) Remove the parts as shown below.
2) Remove the screws (2pcs.), and remove the copy lamp unit from the
mirror base drive wire.
3) Pull the copy lamp unit toward you to remove the harness.
NO.
Part name Ref.
1
Copy lamp unit
2
Copy lamp
3
Lens unit
2)
1)
9)
1)
3)
4)
6)
8)
10)
7)
5)
Hook
1)
2)
2)
3)
3)
4)
4)
1)
2)
3)
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