Read Sharp AL-840 (serv.man5) Service Manual online
<2> Developing section
No.
Parts
Note
Name
Type
Function/operation
1
Developing roller
Attaches toner to the latent electrostatic
images on the OPC drum to convert it into a
visible image.
images on the OPC drum to convert it into a
visible image.
2
Developing doctor
Controls toner quantity on the developing
roller and charges toner.
roller and charges toner.
3
Developing bias
electrode
electrode
Connects the developing roller and the bias
voltage output (high voltage PWB).
voltage output (high voltage PWB).
4
Potential control
electrode
electrode
Connects the developing roller and the bias
voltage output (high voltage PWB).
voltage output (high voltage PWB).
5
Toner stirring roller
Lead toner to the developing roller and
charges toner.
charges toner.
6
Zenor diode
Maintains the potential between the
developing roller and the toner stirring roller
at a constant level.
developing roller and the toner stirring roller
at a constant level.
7
Toner seal
Shields toner from leaking outside the
developing unit.
developing unit.
8
Potential control sheet
Maintains the developing roller potential at
a constant level.
a constant level.
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