Canon NP-1015 Service Manual page 31

.-
,-
III. IMAGE FORMATION SYSTEM
*
A. OUTLINE
t
I)
The basic structure of the image forma-
*
tion system is as shown below.
l
l
Scanning lamp control system
Primary/transfer corona current and
grid bias voltage control system
Controlling developing bias
Document density measurement system
Developing unit/Drum cleaner
Blanking
r
GRID BIAS DRIVE command
(GRDoN)
Developing bias AC component
DCcontroller B 7 :',
Developing bias DC component
,we, control signal (analog)
~
G$I;":LTAGE DRIV:GRBC)
Figure 3-14
When shorted.
signal sent fo
indicate black
developing unit
COPYRI6HT 0 1988 CANON INC.
CkNON NP401511215S AN.0 OCT. 1988 PAINTEO IN JAPAN (IMPFUME IIU JAPONI
3-13