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Technology > Image Formation System > Controls > Developing/drum
Technology > Image Formation System > Controls > Developing/drum
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Developing/drum
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Developing overview
ATR sensor
(TS5 TS8)
Toner feeding screw A
Toner feeding screw B
Waste toner delivery
discharge outlet
Toner-blocking
electrode plate
Developing
cylinder
Developing motor
M5 M8
Parts name
Function
Developing assembly
To develop toner fed from the hopper unit on the photosensitive drum
Developing cylinder
To develop toner in the developing assembly on the photosensitive drum
Toner feeding screw A/B To stir developer (toner and carrier) in the toner container to supply to
the developing cylinder
Toner-blocking electrode
plate
To apply DC bias to the electrode plate to increase retention strength of
toner on the developing cylinder
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Drive configuration
Parts name
Function
M5 to M8
Developing motor To rotate the developing cylinder and the toner feeding screw
TS5 to TS8 ATR sensor
To detect the ratio of developer (toner + carrier) in the developing
assembly
F-2-71
T-2-30
T-2-31
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Developing bias control
To create toner image on the photosensitive drum after the toner has been attached on the
photosensitive drum
Control description
The developing bias (AC, DC negative) generated by HVT1/2 (UN16/17) is applied to the
developing cylinder
• Developing DC bias: bias for generating potential difference from the photosensitive drum
Bias value is determined based on detection result of the drum film thickness
• Developing AC bias: bias for improving image quality
HVT1/2(UN16/17)
DC controller(UN1)
AC+DC
Developing
cylinder
F-2-72