Technical information

4. Turning the Grid Bias ON and OFF
@) When the image is exposed, the DC controller
9=“,““,=,.
@ When the image is not exposed, the DC control-
ler generates GRDON=l.
ka7 goes OFF; output from the comparator
circuit.
bQ6 goes ON.
%7goesON; nooutputfromthecompara- L*current does not flow into the trans-
tor circuit.
former (T4).
bQ6 goes OFF.
bgrid bias is not applied.
bcurrent flows into the transformer
(14); 05 goes OFF.
“~í;;“B”,ha,;“.
The above condition does not charge the drum
and, as such, toner is not attracted to the photo-
sensilive drum (blank control).
The voltage applied to the grid is returned to the
comparator circuit. thereby providing a constant
voltage.
COPYAIGHT G 1992 CANON INC.
CANON NPZi20/2MO RN.0 MAY 1990 PAINTEO IN JAPAN [IMPRIME AU JAPONI
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