Development - Ricoh FAX2000L Service Manual

PRINTING 30 November, 1999

2.2.6 DEVELOPMENT

[D] [C]
[A]
[B]
[E]
H545D519.WMF
Overview
The toner supply bar [A] stirs and carries toner to the toner application roller [B].
The toner application roller is a sponge-like structure which carries toner to the
development roller [D]. As the development roller [D] turns past the toner metering
blade [C], only a thin coating of negatively charged toner particles stays adhered.
(Refer to section 4-4-2 of the Group 3 Facsimile manual.)
During printing, the power pack applies a bias voltage of -650V to the toner
application roller and another bias voltage of -400V to the development roller. The
potential difference between these two rollers carries the toner from the toner
application roller to the development roller.
The exposed area on the drum [E] is at -200V. The development roller applies
toner to the latent image areas as they turn past the drum.
The development roller is made of soft rubber so it does not damage the surface of
the drum.
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