Development - Brother MFC-9320CW Service Manual

3.6.3

Development

Toner is attracted to the latent-image area on the exposure drum where surface potential is
lowered due to exposure.
By controlling the developing bias voltage supplied to the develop roller, the amount of toner
taken to the exposure drum is adjusted to keep printing density constant.
Toner
<Flow up of toner to the development process>
(1) Toner adheres to the charged develop roller.
(2) The thickness of the adhered toner is evened out by the blade.
(3) The toner adhered to the develop roller is attracted to the exposed areas of the exposure
drum.
Develop roller
400 V
(Changes depending on use condition)
LED beam
700 V
150 V
Exposure drum
Fig. 2-24
Blade
Develop roller
Fig. 2-25
2-26
Charging
Exposure drum
Confidential