Controlling The Developing Bias - Canon CLC1000 Service Manual

2. Controlling the Developing Bias

The developing bias applied to the developing cylinder is a combination of an AC bias and a DC bias.
A DC bias is generated by the transformer on the HVT3A, and an AC bias is generated by the high-volt-
age transformer 3A based on fl kV generated by the transformer on the high-voltage transformer 38. (The
AC bias is generated so that it assumes the wave forms shown in Figure 3-528.) Both DC and AC biases
are controlled by control signals from the DC controller for application.
The DC bias to the stray toner collecting electrode is generated by the high-voltage transformer 3B and
sent in response to control signals.
Control signal 4
DC controller PCB
V
Transformer for +l kV
+ l k V
Transformer for -1 kV
Transformer or
stray toner
collecting electrode
Figure 3-527
AC bias
Figure 3-528
CANON CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU
+ l k V
q