Ricoh G081, Service Manual

Page: 179 / 272

PRINT PROCESS
SM 6-17 G081/G092
Detailed
Des
cription
s
6.3.5 DEVELOPMENT
PCU and OPC drum
[A]: Toner supply paddle shaft
[B]: Doctor blade
[C]: Development roller
[D]: Cleaning blade [E]: Spiral paddle shaft
[F]: OPC drum
[G]: Toner supply roller
[H]: Gear-driven wire paddle
Development mechanism
The development roller [C] is activated and charged to about -250 volts (400 VAC
p-p). The toner supply roller is charged to –300 volts.
The development roller rotates at 1.33 times the speed of the OPC drum [F] to
ensure a sufficient supply of toner. Both the toner supply roller [G] and the
development roller rotate clockwise.
The toner supply roller supplies a layer of toner to the development roller.
The doctor blade [B] smoothes the toner, ensuring the toner is evenly distributed
on the development roller surface.
A gear-driven wire paddle [H] agitates the toner and keeps it moving towards the
development roller.
G081D913.WMF
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]