Controlling The Bias For The Static Eliminator During Separation - Oce 3121 Technical & Service Manual

4 Controlling the bias for the Static Eliminator during separation

Switching ON and OFF the bias for the static eliminator
The CPU (Q605) on the power supply PBA, receives the separation static elim-
inator ON signal (SEBON). This causes the separation static eliminator bias
drive circuit to apply a bias to the static eliminator.
Controlling the voltage
The output for the eliminator bias is returned to the bias drive circuit. This is
used to control the voltage to a specific value.
Switching the bias voltage for the static eliminator
The separation bias differs physically for copying on the first and second side
of a two-sided copy or for an overlay copy.
To suit differences, the separation static eliminator drive signal 1/2 is used to
switch the bias voltage. This ensures efficient separation.
Composite power supply PCB
drive circuit
J209-B7
J102-B4
ed.1
T101 Transformer
(increase)
circuit
Separation static
eliminator bias
drive circuit
T101
Q605
CPU
J209-A4~A9
J102-A1~A7
IC101
CPU
DC controller PCB
Photosensitive
drum
Separation
static eliminator
06 Transfer 505