Filter
Top Products
G. Controlling Blank Exposure
1. Outline
The copier uses the reflecting plate to direct the light of the pre-exposure lamp to the
photosensitive drum by way of executing blank exposure, thereby blanking (whiting) out
the non-image areas and areas between copies.
The area of blank exposure is controlled by the two slide shutters and one open/close
shutter.
Figure 4-115
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
4-18
Lens motor
M
Change solenoid (SL1)
Slide shutter (rear)
Reflectiong plate
for size blanking
Gear A
Gear B
Reflectiong plate
for full blanking
Blank shutter
solenoid
(SL3)
Pre-exposure lamp
Open/close shutter
Blanking shutter home
position sensor (PS3)
Slide shutter
(front)
DC controller PCB
Blank shutter solenoid drive signal
(BSSLD*)
Blank shutter home position
detection signal (BSHP)
Change solenoid drive signal (CHSLD*)