Canon imageRUNNER ADVANCE C5051 Series Service Manual page 84

2
Technology■>■Image■Formation■System■>■Controls■>■Primary■charging
Execution■time
Within■1■second
Operation■of■the■main■unit
1)■Current■monitoring■value■of■the■primary■charging■AC■bias■is■detected
2)■Optimal■primary■charging■current■value■is■determined■according■to■the■result■of■the■
environment■sensor■(UN22)■and■the■current■monitoring■value
3)■The■primary■charging■AC■bias■is■determined■to■apply■to■the■primary■charging■roller
Y M C Bk
Primary charging roller
Related■error■codes:
E061-0X01:■Abnormal■current■run■to■the■Drum■(small■current■level■or■no■drum■is■found)
E061-0XE0:■The■change■in■current■level■for■Drum■film■thickness■detection■is■too■much■
compared■to■the■previous■time.
E061-0XF0:■Abnormal■initial■current■level■at■the■time■of■initialization■of■the■Drum■film■thickness■
(large■current■level)
E061-0XF1:■Abnormal■initial■current■level■at■the■time■of■initialization■of■the■Drum■film■thickness■
(small■current■level)
x■indicates■the■corresponding■color.■(0=Y,■1=M,■2=C,■3=Bk)
2 Technology■>■Image■Formation■System■>■Controls■>■Primary■charging
Primary charging AC
HVT1
Current monitoring signal
(UN16)
Primary charging AC DC controller
(UN1)
HVT2
(UN17)
Current monitoring signal
● Primary■charging■cleaning■control ■
This■machine■may■not■be■able■to■collect■residual■toner■on■the■drum■because■this■machine■
uses■fine-grain■toner,■which■possibly■results■in■image■fault■(white■spot/missing■image)■due■to■
residual■toner■attached■on■the■primary■charging■roller.
To■prevent■this■symptom,■the■cleaning■brush■roller■is■added■to■forcibly■remove■residual■toner■
attached■on■the■primary■charging■roller.
The■drive■of■the■brush■roller■is■engaged■with■the■primary■charging■roller.
F-2-69
Photosensitive Drum
drum cleaner
Cleaning brush Primary charging
roller roller
F-2-70
2-48
2-48