Canon NP2120 Service Manual page 71

b. Controlling the DC Bias Voltage Level
Controlling the DC Bias Voltage Level
D C controller
C T unit is used.
Figure 3-28
C A N O N NPZWl/2MO KV.0 M A Y 1990 PNINTEO I N J A P A N IIMPAIME AU JAPONI
O P E R A T I O N S A N D T I M I N G B
The above condition supplies the developing
cylinder with DC biases.
DCBC varies between 6 and 16 Vas adiusted
by the copy density key.
DCBC
Development bias
DC component
(black developing
assembly)
Developing bias
DC component 480 to-110 V
(CT unit)