
E. Controlling the Separation Static Eliminator Bias
1. Turning ON and OFF the Separation Static Eliminator Bias
The separation static eliminator ON signal (SEBON) causes the CPU (Q605) on the composite power
supply PCB to drive the separation static eliminator bias drive circuit to apply a bias on the separation sta-
tic eliminator.
2. Controlling the Voltage to a Specific Level
The separation static eliminator bias output is returned to the bias drive circuit to control the voltage to
a specific value.
3. Switching the Separation Static Eliminator Bias Voltage
The separation bias differs physically for copying on the first and second side of a two-sided or an over-
lay copy.
To suit differences, the separation static eliminator drive signal 1/2 is used to switch the bias voltage,
ensuring stable separation.
COPYRIGHT © 1996 CANON INC. CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3–68
3. OPERATIONS AND TIMING
Figure 3-507
Composite power supply PCB
Transformer
(increase)
circuit
Separation static
eliminator bias
drive circuit
T101
drive circuit
DC controller PCB
Photosensitive
drum
Separation
static eliminator
T101 drive signal
Serial communication
Separation static
eliminator
ON/OFF signal
Separation static eliminator
drive siganl 1
Separation static eliminator
drive siganl 2
T101
Q605
CPU
IC101
CPU
J209-A4~A9
J102-A1~A7
J209-B7
J102-B4