Developing Bias; Hmt (High Grade Micro Toning) Development; Developer Scattering Prevention Mechanism - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
8.3.3

Developing bias

• The developing bias voltage (Vb) is applied to the Developing Roller so that an adequate
amount of toner is attracted onto the surface of the PC Drum.
• In addition to the negative DC component, AC voltage is applied during development to
help toner to be attracted more easily to the surface of the PC Drum. This AC component
is applied only while development is taking place.
• The developing bias (Vb) is supplied from High Voltage Unit/2.
8.3.4

HMT (High grade Micro Toning) development

• The machine employs the two-component non-contact development system.
• With the HMT method, the magnetic developer brush does not rub against the surface of
the PC Drum (the images). Accordingly, sharper line images can be reproduced, involv-
ing no uneven image density at the trailing edge or thin lines and achieving even finer
reproduction of the solid image areas.
Developing Roller
8.3.5

Developer scattering prevention mechanism

• To prevent the image and machine interior from being dirtied, a filter installed in the rear
of the IU and the Toner Suction Fan Motor work to trap toner particles rising up during
development.
Developing Roller
IU
Holder
2-23
Developing section
Developing Bias
PC Drum
4036ma2013c1
Filter
Holder
4036ma2247c0
4036ma2507c0