Canon imageRUNNER ADVANCE C5255, Руководство по обслуживанию, Страница: 89 / 1443

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Technology > Image Formation System > Controls > Developing/drum
Technology > Image Formation System > Controls > Developing/drum
● ACR (Auto Carrier Refresh) control
This machine introduced a method to supply developer (toner + carrier) to improve life (longer
life) of the developing assembly.
This is a control to supply developer to the developing assembly and also discharge
developer to keep optimal developer amount in the developing assembly.
This control prevents deterioration of carrier, which had been occurred due to reuse of
developer in the developing assembly.
The Toner Feed Screw A & B drive when the Developing Motor (M5 to 8) drives so that the
developer will be exhausted. The developer is supplied at the right time based on the ATR
control result.
Return screw Toner feeding screw A
Toner feeding screw B
Flow of toner
Toner feeding screw C ATR sensor
Toner discharge outlet
Toner supply inlet
Toner supply inlet
Return screw
Toner feeding screw A
Toner feeding screw B
Toner feeding screw C
Toner discharge outlet
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● Toner-blocking bias control
This control prevents scattering of toner on the developing cylinder due to deterioration of the
developing assembly.
Developing AC bias which has been generated by HVT1 (UN16) is generated to be negative
DC bias on the developing sub high voltage PCB (UN43 to 46).
The generated bias is applied to the toner-blocking electrode plate. This improves retention
strength of toner on the developing cylinder.
HVT1/2 (UN16/17)
DC controller(UN1)
Developing sub high voltage PCB Y/M/C/Bk (UN43 46)
Toner feeding screw A Toner feeding screw B
Toner-blocking
electrode plate
DC
Developing
cylinder
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