Canon imageRUNNER ADVANCE C5051 Series Service Manual page 85

2
Technology■>■Image■Formation■System■>■Controls■>■Developing/drum
■ Developing/drum ■
● Developing■overview ■
Toner feeding screw B
Developing motor
M5 M8
ATR sensor
(TS5 TS8)
Waste toner delivery
discharge outlet
Parts■name
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■ To■apply■DC■bias■to■the■electrode■plate■to■increase■retention■strength■of■
plate toner■on■the■developing■cylinder
● Drive■configuration ■
Parts■name
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
2 Technology■>■Image■Formation■System■>■Controls■>■Developing/drum
Toner-blocking
Developing
electrode plate
cylinder
Toner feeding screw A
Function
Function
● 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
F-2-71
T-2-30
T-2-31
DC controller(UN1)
HVT1/2(UN16/17)
AC+DC
Developing
cylinder
2-49
F-2-72
2-49