Primary Charging Cleaning Control - Canon imageRUNNER ADVANCE C5045 Series Service Manual

2
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: Current monitor value error other than initial detection (current monitor value is
lower limit or less, or drum unit is absent)
E061-0XE0: Current monitor value error at initial detection (current monitor value is upper limit
or more)
E061-0XF0: Current monitor value error at initial detection (current monitor value is lower limit
or less)
E061-0XF1: Change amount error of current monitor value (change amount is abnormal after
time elapsed)
x indicates the corresponding color. (1=Y, 2=M, 3=C, 4=Bk)
2
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-2-73 F-2-73
Photosensitive Drum
drum cleaner
Cleaning brush Primary charging
roller roller
F-2-74 F-2-74
2-46
2-46