Specifications

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001
CHAPTER 2 OPERATIONS AND TIMING
2-17
2.3.2 Detecting the Presence/Absence of an Original
The presence/absence of an original in the original tray is detected by the original sensor
(S6).
When an original is placed on the original tray, the light from the light-emitting side of
the original sensor is blocked, causing the light-receiving side of the original sensor to send
the original detection signal (DTS) to the ADF controller PCB, which in response turns on
the Original Set indicator.
F02-203-02
ADF controller PCB
S6 (light-receiving side)
S6
(light-emitting side)
S6
(light-receiving side)
ADF controller PCB
When an original is detected When no original is detected
S6
(light-emitting side)
S6
(light-receiving side)
ADF controller PCB
DTS signal
DTS signal
Original
Light is blocked.
S6 (light-emitting side)