Sharp AR-651 (serv.man4) Service Manual ▷ View online
3 - 39
AR-651/810 ADJUSTMENT
3. 11. Adjustment of Reversing Automatic Document Feeder
3. 11. 1. Installing of the RADF unit
When replacing an RADF unit to another one, install it with 2 RADF positioning pins according to the
following procedure.
(1) Attach the positioning pins to the copier.
(2) Put the RADF quietly on the copier and slide it
to the front side.
(3) While closing it slowly, adjust the RADF unit
to the position where the positioning pins fit
smoothly into the holes at the unit.
(4) Loosen 2 screws fixing a hinge at the exit side
and move the plate to the position where its
center hole and one at the copier side are met
together.
(5) Fix hinges at the feed and exit sides with 2
shouldered screws (shown by white arrows).
(6) Tighten 2 screws loosened at the step (4).
Positioning pin
[Exit side]
[Feed side]
Plate
AR-651/810 ADJUSTMENT
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3. 11. 2. Skew adjustment
When an image skew occurs, carry out copying at the manually placed original mode and check it is not
occuring. When it occurs at this mode, adjust the scanning section (
Chap.3.3.4).
(1) Check if the RADF unit is installed properly (
Chap.3.11.1).
(2) Adjust the image according to the following steps while checking the conditon of the image skew.
쩺
쩻
Step 2
Loosen the screws fixing the hinges at the rear
side (1 screw each for the feed and exit sies) and
perform the adjustment by turning the adjustment
screw from the front side.
In case of : Turn the adjustment screw to CCW
direction.
In case of : Turn the adjustment screw to CW
direction.
Step 1
Open the jam access cover and adjust the position of the plate at the registration roller side.
In case of : Move a screw to the long hole and shift the plate to the direction of B.
In case of : Move a screw to the long hole and shift the plate to the direction of A.
쩸
쩹
쩹
Step 3
Open the jam access cover and adjust the position of the plate at the read roller side.
In case of : Move a screw to the long hole and shift the plate to the direction of B.
In case of : Move a screw to the long hole and shift the plate to the direction of A.
쩼
쩽
쩽
Step 1
Step 3
A
A
B
B
[Feed side]
Adjustment screw
Step 1
Step 2
Step 3
쩸
쩹
쩺
쩻
쩼
쩽
Paper
Paper
Paper
Image
Image
Image
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AR-651/810 ADJUSTMENT
A
B
C
3. 11. 3. Adjustment of solenoid
(1) Disengagement solenoid
To install the solenoid, put the end faces of the
bracket and solenoid together and fix the solenoid
with two screws at the position (A) and (B). When
the large original exit roller is not disengaged
completely, move the screw from the position (A)
to (C) and shift the solenoid downward to adjust
the level of the disengagement.
(2) Small original exit solenoid
To install this solenoid, put the end faces of the
bracket and solenoid together. When the small
original reverse flapper is not pulled at completely,
loosen two screws and shift the solenoid upward
to adjust the level of the flapper movement.
(3) Large original exit solenoid
To install this solenoid, put the end faces of the
bracket and solenoid together. When the large
original reverse flapper is not pulled at completely,
loosen the screws and shift the solenoid upward to
adjust the level of the flapper movement.
Ends faced-up
Ends faced-up
Ends faced-up
AR-651/810 ADJUSTMENT
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When opening the RADF, adjust the bracket
position so that the switch is turned on when the
front side height becomes 40~45mm (within the
empty weight falling limit).
40 ~ 45mm
3. 11. 4. Adjustment of RADF open/close switch
3. 11. 5. Adjustment of RADF height
The height is adjusted with 2 adjustment screws at
hinges.
Adjust the height so that the platen guide holders
(front, rear) touch the ADF original glass.
Adjustment screw
Platen guide holder
Platen sheet
ADF original glass
Original glass
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