Functional Description; Controlling The Developing Bias - Oce 3121 Technical & Service Manual

Functional description

1 Controlling the Developing Bias

Outline
The circuit for the control of the developing bias, on the power supply PBA ,
has the following functions:
Switching the AC developing bias ON and OFF.
I
Switching the DC developing bias ON and OFF.
I
Limiting the DC developing bias to a specific voltage.
I
Composite power supply PCB
J209-A4~A9
J102-A1~A7
ed.1
T101
+5V
T101
drive
circuit
Voltage
detection
circuit
Q605
CPU
J209-B3
J209-B9
J102-B8
J102-B2
IC101
CPU
DC controller PCB
Developing AC
drive circuit
Photosensitive
J209-B8
J102-B3
drum
Developing
cylinder
05 Developing 501