Sharp AR-810 (serv.man15) Service Manual ▷ View online
AR-651/810 DRUM/CLEANER UNIT 11 - 5
11. 4. 4. Construction
•
Image quality sensor
: Emitting of the light which corresponds to the light control
voltage to output the voltage which corresponds to the
reflective light amount for the toner image on the drum
•
D/A converter
: Outputting of the light source light control voltage
•
Laser optical unit
: Carrying out the test pattern exposure to form the toner image
•
A/D converter
: Converting of the sensor output voltage into the digital value
•
Image formation process system
: Charging/Laser exposuring/Developing
•
CPU
: Carrying out of the procedure [1]~[7] described in the previous
page
Image formation process system
Main charger
Image quality sensor
Drum
Laser exposure
Developing
Test pattern
Main CPU
Reflected light
amount signal
Light source
amount signal
Various image
formation conditions
A/D
D/A
AR-651/810 DRUM/CLEANER UNIT 11 - 6
Main charger
Cleaner unit
11. 5. Disassembly and Replacement
[A] Cleaner unit
(1) Open the front cover and take off the front
side right inner cover, toner cartridge drive
unit, toner recycle unit, developer unit and
main charger.
(2) Remove 2 screws and pull out the cleaner
unit.
Drum thermistor
Connector
[B] Drum thermistor/Drum
(1) Disconnect 1 connector and remove 1 screw.
Then take off the drum thermistor with the
bracket.
(2) Turn the cam to release the pressure of the
cleaning blade.
(3) Remove 1 screw and take off the drum shaft.
(4) Pull out the drum upward.
Drum shaft
Cam
AR-651/810 DRUM/CLEANER UNIT 11 - 7
Cleaner top cover
Foot of screw
(5) Remove 3 screws and take off the front side
flange.
(6) Pull out the drum upward.
[C] Cleaning blade
(1) Pull out the drum.
(2) Remove 4 screws and take off the cleaner top
cover.
(3) Turn over the cleaning blade with holding the
bracket.
(4) Remove 1 screw.
(5) Pull out the cleaning blade with holding each
foot of 2 screws.
AR-651/810 DRUM/CLEANER UNIT 11 - 8
Recovery blade
A
Recovery blade
Cleaner flame
Drum surface
Cleaning brush
Holding shaft
Plate
[D] Recovery blade
(1) Remove the recovery blade.
Notes: 1. The recovery blade is attached with a
double-faced tape, so remove the tape
completely before attaching a new blade.
2. Attach the recovery blade fitting its
bottom edge into the notch of the cleaner
frame.
[E] Cleaning brush
(1) Pull out the rear side holding shaft and take
off the cleaning brush.
[F] Drum separation finger
(1) Remove 2 screws and take off the plate at the
rear side.
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