Canon IMAGERUNNER ADVANCE C5030, Service Manual, Page: 91 / 1455

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Technology■>■Image■Formation■System■>■Controls■>■Transfer/separation
Technology■>■Image■Formation■System■>■Controls■>■Transfer/separation
■ ● Drum■rotation■speed■control
This■control■is■performed■to■keep■a■uniform■drum■rotation■speed■in■order■to■increase■accuracy■
of■the■image■position■(color■displacement).
Execution■timing
1)■The■drum■rotates,■driven■by■the■drum■motors■(M1■to■M4).■
2)■There■is■an■encoder■on■the■drum■shaft,■of■which■rotation■is■monitored■by■the■two■sensors■(Y:■
UN31/32,■M:■UN33/34,■C:■UN35/36,■Bk:■UN37/38,).■
3)■This■sensor■counts■the■drum■count■based■on■a■pulse,■and■feeds■back■the■drum■rotation■
speed■to■the■drum■DC■controller■to■perform■speed■control.
Drum motor
(M1~M4)
Photosensitive drum
DC controller (UN1)
Drum rotation sensor1
(UN31 / 33 / 35 / 37)
Drum rotation sensor2
(UN32 / 34 / 36 / 38)
F-2-81
■
■
Transfer/separation
■ ● Overview
Secondary transfer
outer roller
Primary transfer
roller
(Bk)
Primary transfer
roller
(C)
Primary transfer
roller
(M)
Primary transfer
roller
(Y)
Tension roller
ITB Cleaning
blade
Waste toner
feeding screw
Drive roller
(steering roller)
ITB scraper
Post-secondary transfer
static eliminator
Primary transfer
auxiliary roller
Toner■on■the■photosensitive■drum■is■transferred■on■paper
Parts■name Function
ITB■unit To■transfer■toner■on■the■photosensitive■drum■to■the■paper
■■■■■ ITB■(Intermediate■Transfer■Belt) To■transfer■toner■on■the■photosensitive■drum
Primary■transfer■roller To■attract■toner■on■the■photosensitive■drum■to■the■ITB
Primary■Transfer■Auxiliary■Roller To■make■the■contact■surface■of■Primary■Transfer■Roller■(Y)■with■
the■ITB■horizontal.
Static■eliminator To■drive■ITB.■To■correct■the■displacement■of■ITB.
ITB■scraper To■scrape■toner■inside■the■ITB
Tension■roller To■keep■appropriate■tension■of■the■ITB
Cleaning■blade To■scrape■toner■on■the■ITB
Waste■toner■feeding■screw To■feed■residual■toner■inside■the■ITB■cleaner■unit
Secondary■transfer■unit To■transfer■toner■on■the■ITB■to■the■paper
■■■■■ Secondary■transfer■outer■roller To■attract■toner■on■the■ITB■to■the■paper■and■feed■the■paper
Static■eliminator To■eliminate■electric■charge■on■the■paper■after■secondary■
transfer
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