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Technology > Image Formation System > Controls > Primary charging
Technology > Image Formation System > Controls > Primary charging
Execution time
Approx. 4 seconds
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
HVT1
(UN16)
DC controller
(UN1)
Primary charging roller
Current monitoring signal
Primary charging AC
Y
M
C
Bk
HVT2
(UN17)
Primary charging AC
Current monitoring signal
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)
F-2-69
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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 (image soiling) 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.
Photosensitive
drum
Primary charging
roller
Cleaning brush
roller
Drum
cleaner
F-2-70