Checking The Sensor Output - Canon DADF-R1 Service Manual

5.3.3.5 Checking the Sensor Output

The DADF uses a 7-segment LED (DSP1) on its ADF controller PCB to allow a check on the presence/absence
of paper or the state (open/closed) of the upper cover of the following sensors:
DIS1
(1)
(2)
(3)
(4)
(5)
(6)
Sensor in question
(notation)
Original sensor (S6)
Original trailing edge
sensor (S7)
Separation sensor (S4)
Skew sensor (S5)
Pre-registration roller
paper sensor (S2)
Pre-registration roller
paper sensor (S2)
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DSP1
Chapter 5
Sensor in question
(notation)
Manual feed
registration roller
paper sensor (S9)
(8)
Pre-reversal paper
sensor (PI 4)
(A)
Original delivery
sensor (PI 13)
(b)
Manual feed set
sensor (PI 12)
(C)
ADF open/closed
sensor
(PI 10)
(d)
Upper cover sensor
(front; PI 6, rear;PI
3)
(E)
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