Sharp AL-2021 Service Manual ▷ View online
AL-2041 OPERATIONAL DESCRIPTIONS 7 - 9
D. SPF open/close detection
(book document detection)
SPF open/close detection (book document) detection is performed
by detecting the interval between the reference lines on the white
Mylar attached to the paper exit guide (document scanning section)
by the scanner (CCD) and detecting the varied quantity.
by detecting the interval between the reference lines on the white
Mylar attached to the paper exit guide (document scanning section)
by the scanner (CCD) and detecting the varied quantity.
Note: When replacing the carriage unit, be sure to execute SIM41-
06.
If SIM41-06 is not executed, the carriage unit may not read
the reference line on the white Mylar, preventing the docu-
ment from being fed.
If SIM41-06 is not executed, the carriage unit may not read
the reference line on the white Mylar, preventing the docu-
ment from being fed.
B
A
B
A
A - B = Varied quantity of pixels
(pixel)
(Floating)
(White Mylar)
(CCD)
Reference line
Reference line
AL-2041 DISASSEMBLY AND ASSEMBLY 8 - 1
[8] DISASSEMBLY AND ASSEMBLY
The disassembly and assembly procedures are described for the
following sections:
following sections:
1. High voltage section
2. Operation panel section
3. Optical section
4. Fusing section
5. Tray paper feed/transport section
6. Manual paper feed section
7. Rear frame section
8
Power section
9. Duplex motor section (AL-2041)
10. Reverse roller section
11. SPF section (AL-2031/2041)
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.
Before disassembly, be sure to disconnect the power cord
for safety.
for safety.
1. Do not disconnect or connect the connector and the
harness while the machine is powered. Especially be
careful not to disconnect or connect the harness between
the MCU PWB and the LSU (MCU PWB: CN5) during the
machine is powered. (If it is disconnected or connected
during the machine is powered, the IC inside the LSU will
be destroyed.)
careful not to disconnect or connect the harness between
the MCU PWB and the LSU (MCU PWB: CN5) during the
machine is powered. (If it is disconnected or connected
during the machine is powered, the IC inside the LSU will
be destroyed.)
2. To disconnect the harness after turning on the power, be
sure to turn off the power and wait for at least 10 sec
before disconnection. (Note that a voltage still remains
immediately after turning off the power.)
before disconnection. (Note that a voltage still remains
immediately after turning off the power.)
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)
AL-2041 DISASSEMBLY AND ASSEMBLY 8 - 2
2) Clean the TC front guide and the TC holder with alcohol.
3) Set the charger cleaner to the transfer unit, and move it recipro-
cally a few times in the direction of the arrow shown in the figure
below.
below.
E. Charger wire replacement
1) Remove the TC cover and remove the screw.
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.
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) Open the side door, and Open the front cover.
1)
2)
3)
4)
No.
Part name Ref.
1
Operation panel unit
2
Operation PWB
1mm
1.5mm
Fig.1
1)
1)
2)
3)
Charger wire
Protrusion
1)
2)
AL-2041 DISASSEMBLY AND ASSEMBLY 8 - 3
2) Remove the screws (4 pcs.), the harness, and the operation
panel unit.
3) Remove four screws, and remove the operation cabinet.
4) Remove nine screws, and remove the operation PWB.
C. Assembly procedure
For assembly, reverse the disassembly procedure
3. Optical section
A. List
B. Disassembly procedure
1) Remove four screws, and remove the rear cabinet and the rear
cabinet cover.
2) Remove two screws, and remove the earth wire.
3) Disconnect the connector.
4) Remove the SPF unit.
1)
1)
1)
2)
1)
1)
1)
1)
1)
2)
3)
3)
3)
3)
3)
3)
3) 3)
4)
NO.
Part name Ref.
1
Copy lamp unit
2
Copy lamp
3
Lens unit
1)
1)
2)
2)
1)
1)
2)
3)
1)
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