Sharp JX-8200 Service Manual page 37

SHARP SERVICE MANUAL JX8200SM [6] EXTERNAL VIEW AND INTERNAL STRUCTURE
E. Black developing unit
1
9
8
No. Part name
1 Developing roller drive coupler
2 Developing roller
3 Toner density sensor
4 Developing shutter
5 Connector
6 Developer stirring screw A
7 Developer stirring screw B
8 Developer stirring screw C
9 Developing shutter arm
10 Doctor
11 Developing stirring screw D
F. Toner hopper section
No. Part name
1 Toner hopper lock lever
2 Toner supply screw
3 Toner motor
4 Toner shutter
5
4
3
2
6
7
Transmits developing motor power to the developing drive system.
Developer and toner are attached to the roller surface by magnetic force and static electricity to make
charged toner adhere to the electrostatic latent images on the OPC drum. This operation is called
"Developing."
Detects the toner density.
There is a fuse inside this sensor to detect whether the DV unit is a virgin one or not. When a virgin DV unit
is installed, the fuse is blown to reset the DV counter.
Makes contact with the developing roller and separates from it to make developer adhere to the developing
roller and remove developer from it.
Connects the developing unit with the PCU PWB and the high voltage PWB.
Stirs developer and toner to provide uniform toner density and charge toner at the same time.
Transmits power to the developing shutter for opening and closing.
Controls the amount of developer on the developing roller to be proper level. This maintains the developing
density at proper level.
Stirs developer and toner to provide uniform toner density and charge toner at the same time.
Also transmits developer and toner to the developing roller.
2
1
4
Locks and releases the toner hopper unit.
Transports toner from the toner hopper to the developing unit.
Drives the toner transport screw.
Closes toner supply port to prevent against toner leakage when the toner hopper unit is released.
11
3
5
Function, operation
3
Function, operation
6 – 10
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4
10
6
7
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