Printing; Printing Processes Around The Drum - Ricoh Bizworks 106 Service Manual

PRINTING

2.2 PRINTING

2.2.1 PRINTING PROCESSES AROUND THE DRUM

[J]
[G]
[H]
This machine uses a "write to black" system, using negative toner.
Charge: The charge brush roller [A] gives the OPC drum [B] surface a negative
charge of -750 volts.
Exposure: A laser [C] writes a latent image on the drum. The area exposed by the
laser beam drops to about -100 volts.
Development: The development roller [D] carries toner to the drum and develops
the latent image on the drum surface.
Development bias (during printing):
Switching bias (At the start and the end of any print process):
Image Transfer: The transfer roller [F] pulls the toner from the drum onto the
Paper Separation: The antistatic brush [H] removes the charge on the underside
Drum Cleaning: The cleaning blade [J] removes any toner remaining on the drum
The high voltages are supplied from Mechanical Control Board.
Toner application roller [E]: -650 volts
Development roller [D]: -400 volts
Toner application roller [E]: 0 volts
Development roller [D]: +250 volts
paper [G]. A constant current of 4.3 µA (6.0 µA for envelopes) is
applied.
of the paper to help the paper separate from the drum.
after the image is transferred to paper.
[A]
[B]
[C]
[F]
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18 May, 1999
[D]
[E]