Theory of Operation
V
er. 1.1 Apr. 2010
13. IMAGI
N
G U
N
IT SECTIO
N
(developing)
31
bizhub 164
COMPOSITION/
OPERA
TION
13.3.2
Developing Bias
•
V
b (-DC, AC) is applied to the developing roller.
•
V
b (-DC) is applied to prevent toner from sticking to the background of the image.
•
V
b (AC) is applied to enhance good separation of toner from carrier.
• The amount of toner sticking to the surface of the drum is varied according to the differ-
ence in potential between the voltage (
V
i) on the surface of the drum and
V
b (-DC).
• Large difference = A greater amount of toner sticks.
• Small difference = A smaller amount of toner sticks.
13.3.3
TCR Sensor Automatic Adjustment
• The developer in the developer mixing chamber is forcibly agitated and the output volt-
age of the TCR sensor is adjusted.
• The output voltage serves as data for calculating the T/C ratio. This adjustment must be
made whenever the developers are changed.
That is, make the TCR sensor automatic adjustment only when the developers are
changed.
A0XXT2C551AA
Developing Bias Terminal
