21 May, 1999
PRINTING
2-15
Detailed
Descriptions
Bias Control Circuit
The CPU controls the voltages to the toner application and development rollers
through the I/O Driver, using the BIASCTL and BIASPWM signals as shown in the
following table.
In
BIASCTL
Low
High
Low
High
BIASPWM
On
On
Off
Off
Out
Toner Application Roller
- 650 V
0 V
Off
Off
Development Roller
- 400 V
+ 250 V
Off
Off
FCIP05
I/O
Controller
1 1 - 8
Power
Pack
1 1 - 9
B I A S P W M
F C U
1 1 - 7
1 1 - 1 0
B I A S C T L
Transfer H
Transfer L
Toner Application
Roller
D e v e l o p m e n t
Roller
Transfer Roller
H547D509.WMF
