Developing Bias - Konica Minolta BizHub C360 Service Manual

Theory of Operation Ver. 1.0 Jul. 2009
11.3.4

Developing bias

• The developing bias voltage (Vdc) is applied to the developing roller so that an adequate
amount of toner is attracted onto the surface of the photo conductor.
• 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. At any other timing, only the DC (-) Vdc
is applied.
• The developing bias (Vdc) is supplied from high voltage unit.
• The developing bias voltage supplied from the high voltage unit is applied to the develop-
ing roller of each color of toner via the metal shaft of the developing drive gear.
• For the application timing of bias voltage, see "Image forming control".
Photo conductor
Developing bias application
terminal
Color developing drive gear shaft
Developing bias voltage
application terminal/Y
Black developing drive gear shaft
Developing bias voltage application
terminal/K
Developing bias voltage application
terminal/C
Developing bias voltage application
terminal/M
Developing roller/Y
11. DEVELOPING SECTION
Developing roller
A0EDT2C045DA
Developing roller/K
Developing roller/C
Developing roller/M
A0EDT2C046DA
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