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Model
AR-D12
Pages
10
Size
880.11 KB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / ARD11 and ARD12 (Cassette Option) Service Manual (part 1)
File
ar-d12.pdf
Date
PREV: Sharp AR-D11 (serv.man14) Service Manual / Technical Bulletin

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For copier models with one paper tray
Turn off the main switch of the copier and then remove the power plug
of the copier from the outlet.
1. Remove the right rear cover from the copier.
Remove the four screws and then remove the right rear cover from
the copier.
2. Remove the rear cover from the optional paper feed
unit.
Remove the two screws and then remove the rear cover from the
optional paper feed unit.
3. Attach the copier
Place the copier on the optional paper feed unit and remove the first
and second paper trays.
Connect the copier to the paper feed unit using four fixing plates and
two screws (M4 x 12) for each plate.
4. Connect the harness.
<1> Connect the cassette relay harness contained in the paper feed
unit to the MCU PWB of the copier.
<2> Remove the relay harness for dehumidifying heater connected to
the paper tray in the main unit.
<3> Connect the relay harness for dehumidification heater contained
in the optional paper tray to the optional paper tray.
<4> Store the harness in the harness holder.
·
For one tray type
·
For two tray type
5. Attach the right rear cabinet of the copier and the rear
cover(s) of the optional paper feed unit.
Attach the right rear cabinet of the copier using four screws, and
attach the rear cover(s) of the optional paper feed unit using two
screws respectively.
Screws
Screws
Right rear cover
Screw
Screw
Rear cover
Detailed view
Fixing plates
Fixing plates
Screws (M4 x 12)
Screws (M4 x 12)
Left of rear side
Right of rear side
Fixing plates
Fixing plates
Screws (M4 x 12)
Screws (M4 x 12)
Cassette relay harness
Harness holder
Relay harness for
 dehumidification heater
Cassette relay harness
 Harness holder
Relay harness for
 dehumidification heater
6. Remove the securing fixture for packing the paper
feed unit and remove the packing material.
Remove the securing fixture for packing that fixes the paper pressure
plate of the tray by rotating it in the direction of the arrow and remove
the packing material.
7. Change the paper size in the tray.
Hold the grip and slide the cassette side plate to adjust it to the paper
to be used.
Then, fit the rear end plate to the specified size position.
Insert the power plug of the copier to the outlet and turn on the main
switch of the copier. Then, carry out the following procedure.
8. Load paper into the paper tray.
Do not exceed the maximum height line.
9. Check for center displacement.
·
Set an original on the document glass and copy it using the paper
tray in the copier.
Then, copy an original using the attached optional paper feed unit.
·
If the center of the copy image from the tray in the copier is differ-
ent from that of the copy image from the optional paper feed unit,
carry out adjustment referring to the service manual.
Installation of Paper feed unit is now complete.
Right rear cabinet
Screw
Screw
Screw
Screw
Rear cover
Securing fixture for packing
[Caution]
Be sure to remove the 
securing fixture before 
turning on the power.
Packing material
Side plate
Rear end plate
[4] EXTERNAL VIEW AND INTERNAL STRUCTURE
1. External view
No.
Name
No. Name
1
Paper feed tray
2
Paper feed right cover
2. Internal structure
Motors, sensors, solenoids, etc.
No.
Code
Name
Type
Function/Operation
Remark
1
PWB
Interface PWB
–
2
Drive motor
Hybrid
Drives gears.
3
LUM1AD
Lift-up motor (No. 1 tray)
4
/PCLIA
Paper feed clutch
Electromagnetic clutch
Rotates the paper feed roller. 
5
TRCLA
Transport clutch
Electromagnetic clutch
Rotates the transport roller. 
6
CSS1
Cassette detection SW
Contact
Detects cassette empty.
7
CSS2
Cassette detection SW
Contact
Detects cassette empty.
AR-D12 only
8
LUM2B
Lift-up motor (No. 2 tray)
9
/PCS1B
Paper feed solenoid
DC solenoid
Feeds paper.
10
DRS1
Door open/close detection SW
Contact
Detects door open/close.
11
DRS2
Door open/close detection SW
Contact
Detects door open/close.
AR-D12 only
12
PAP1
Paper empty sensor
Photo transmission
Detects paper empty in the cassette.
13
LUD1
Upper limit sensor
Photo transmission
Detects the upper limit for paper pickup.
14
PPD1
Paper entry sensor
Photo transmission
Detects paper transport.
15
PAP2
Paper empty sensor
Photo transmission
Detects paper empty in the cassette.
AR-D12 only
16
LUD2
Upper limit sensor
Photo transmission
Detects the upper limit for paper pickup.
AR-D12 only
17
PPD2
Paper empty sensor
Photo transmission
Detects paper transport.
AR-D12 only
18
/PCS2
Paper feed solenoid
DC solenoid
Feeds paper.
AR-D12 only
AR-D12
AR-D11
1
2
2
1
1
2
3
4
5
6
9
18
12
7
8
14
13
15
16
17
10
11
4
[5] OPERATIONAL DESCRIPTIONS
1. Paper transport path
2. Operational descriptions
The operations of this unit is controlled by the copier, and the pickup
roller, the paper feed roller, etc. are driven by the drive motor. 
Paper picked up by the pickup roller is transported by the paper feed
roller, detected by the paper entry sensor, and fed to the resist roller. 
No.
Part name
Operation
1
Pickup roller
Picks up paper.
2
Paper feed roller
Transports paper.
3
Separation sheet
Press paper to the paper feed
roller.
4
Paper entry detection ACT
Detects transport of paper. 
5
Paper entry sensor
Detects transport of paper. 
6
Resist roller
Synchronizes the paper lead
edge and the image  lead edge.
[6] DISASSEMBLY AND ASSENBLY
For disassembly, follow instructions of illustrations 1, 2, 3, ... in this
sequence. For assembly, reverse the disassembly procedures. 
For replacement of parts described in this manual, refer to the Parts
Guide. 
1. Paper feed solenoid
1-1
1-2
1-3
2
1
3
5
4
6
2
3
5
4
1
1)
2)
1)
2)
3)
1)
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