Ricoh G031, Service Manual

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TONER CARTRIDGE
SM 2-13 G031/G032
Det
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2.3.4 DEVELOPMENT
Overview
This machine uses monocomponent toner. The G031 has two agitators [F] in the
toner cartridge(shown above). The G032 has one agitator.
The agitator(s) [F] and the mixing blade [D] mix the toner in the toner cartridge and
transport it to the development roller [C]. Friction between the transported toner
and the doctor blade [A] gives the toner a negative charge.
Internal permanent magnets in the development roller attract the toner to the
development roller sleeve. The doctor blade trims the toner to the desired
thickness on the development roller sleeve. The development roller does not
contact the drum [G]. There is a small gap between the toner on the surface of the
development roller sleeve and the drum. Toner jumps across this gap to develop
the latent image.
The development bias consists of ac and dc components. The ac component
improves the transfer of toner.
The transfer blade [B] is charged to the same voltage as the development bias.
This helps to keep the toner on the drum.
The toner near-end sensor [E] is located under the toner cartridge. The sensor
monitors the toner concentration through the plastic housing of the toner cartridge.
G031D509.WMF
[G]
[E] [D] [C]
[B]
[F] [A]