Sharp AR-810 (serv.man20) Service Manual ▷ View online
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 73
16. 13. Disassembly and Replacement
[A] RADF unit
(1) Remove the rear cover and disconnect 1
connector.
(2) Remove 2 screws, open and move the RADF
unit toward the rear side and take it off
upward.
[B] Covers
(B-1) ADF front cover
(1) Open the jam access cover, remove 3 screws
and take off the ADF front cover.
(B-2) ADF rear cover
(1) Open the jam access cover, remove 4 screws
and take off the ADF rear cover.
ADF front cover
ADF rear cover
Connector
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 74
(B-3) ADF left cover
(1) Remove 2 screws and take off the ADF left
cover while moving it downward.
(3) Remove the clips at the pickup unit, displace
the bushings and take off the pickup unit.
Lock support
(4)
ADF left cover
(4)
(3)
ADF board
Upper guide cover
Bushing
Clip
[C] ADF board
(1) Remove 4 screws and take off the rear cover.
(2) Disconnect all 15 connectors from the board.
(3) Remove 1 screw and 2 lock supports and take
off the ADF board.
(4) Remove 2 screws, release the harness from
the clamp and take off the bracket.
Note: By disconnecting 15 connectors and removing
3 screws mentioned at the above (2), (3) and
(4), ADF board can be taken off with the bracket.
[D] Rollers
(D-1) Pickup roller/Feed roller
(1) Open the jam access cover.
(2) Remove 2 screws and take off the upper
guide cover.
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 75
(D-2) Separation roller
(1) Open the jam access cover.
(2) Remove the pickup unit.
(3) Remove 2 screws and take off the upper
guide unit.
(4) Remove 3 clips and pull out the feed roller
shaft, pickup roller belt and pickup
intermediate shaft. Then take off the pickup
belt and feed roller.
(4) Remove 2 screws and take off the separation
unit.
(5) Remove the clip at the rear side, displace the
bushing and take off the separation roller from
the holder.
Feed roller
Clip
Pickup belt
Separation unit
Clip, Bushing
Separation roller
Upper guide unit
AR-651/810 RADF (DOCUMENT FEEDER) 16 - 76
(6) Remove the clip and pull out the pulley, parallel
pin and separation roller from the shaft.
Pulley, Parallel pin
Clip
Separation roller
[E] Motors
(E-1) Feed motor
(1) Open the jam access cover.
(2) Remove the ADF rear cover.
(3) Remove 2 screws of the harness cover and
slack off the harness.
(4) Disconnect 1 connector, take off the tension
spring, remove 2 screws and take off the feed
motor with the tension bracket.
(5) Remove 2 screws and release the feed motor
from the tension bracket.
<Installing procedure>
(6) After installing the feed motor to the tension
bracket, move it toward the direction of the
white arrow and tack it temporarily to the feed
motor bracket with 2 screws.
(7) Hang the timing belt around the pulley of the
feed motor.
(8) Loosen 2 belt tension screws temporarily and
hook the motor tension spring on the tension
bracket and frame. Then tighten up the screws
while stretching the timing belt.
Note: Make sure that the timing belt is not moved to
the edges.
Connector
(4)
(4)
(6)
(3)
(3)
Feed motor
Tension spring
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