Canon DADF-Q1, Service Manual

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Chapter 2
2-9
2.3 Document Detection
2.3.1 Outline
0011-2238
The DADF is equipped with the following five types of mechanisms of detection:
T-2-2
F-2-13
2.3.2 Detecting the Presence/Absence of an Original
0011-2240
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.
Item Description Sensor used (notation)
Presence/absence of an original Identifies the presence/absence of an original on the original tray. Original sensor (S6)
Original size 1 Identifies the size of the original placed in the original tray (as to being
large-size or small-size). Original trailing edge sensor (S7)
Original size 2 Identifies the size of an original on the move (default size). Registration roller clock sensor (PI5)
Original in manual feeder Detects the presence/absence of an original in the manual feeder. Manual feeder set sensor (PI12)
S7
PI5
SW301
PI12
S6
(light-emitting side)
S6
(light-receiving side)