Canon multipass c3000 Service Manual (en)

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Chapter 2: Technical Reference
2-7
LED 
cell
Control sensor 
logic board
LED 
cell
Incident 
light
Lens
Sensor glass
Incident 
light
Lens
Amorphous silicon 
photo sensor
Control sensor logic board
Optical guide
Document
Incident 
light
Document
Amorphous silicon 
photo sensor
(1728 chips)
LED chip
(12 chips)
Incident light
Illumination 
window
Optical 
guide
Incident     light
Incident light
Incident light
Figure 2-5 Contact Sensor