Major Electrical Parts; Scanner Unit - Canon imageRUNNER ADVANCE C3325 Series Service Manual

2
Technical Explanation > Document Exposure > Overview > Scanner Unit

■ Major Electrical Parts

HTR01
PS_N2
PS_N1
PS_A1
Component part Symbol
Scanner motor STM1 2 phase pulse motor: pulse control
Scanner unit HP sensor PS_A1 Scanner unit HP detection
DADF open/closed sensor PS_N1 DADF open detection (DADF is detected at 5 degree)
(Front)
DADF open/closed sensor PS_N2 DADF open detection (size detection timing is detected
(Rear) when DADF is open at 25 degree)
Original size sensor (AB type / PS_R1 Size detection in vertical direction (AB type / AK type)
AK type)
Original size sensor (INCH PS_R2 Size detection in vertical direction (INCH type)
type)

Scanner unit

--- Image reading, analog image processing
Reader Heater HTR01 To prevent condensation from forming on the reader
2 Technical Explanation > Document Exposure > Overview > Scanner Unit
STM1
PS_R2
PS_R1
F-2-4
Function/specification
T-2-2
■ Scanner Unit
Original exposure and scanning are performed by the integrated scanner unit of LED,
turndown mirror, free curved mirror, and Reading sensor.
Light emitted from LED is reflected by the original and reaches the Reading Sensor
throughthe Reflection Mirror and the newly developed Lens Unit.
Lens
LED (light source)
Mirror
No.4
Mirror
No.2
Mirror
No.5
Lens
2-4
Reflection Mirror
Mirror
No.3
Mirror
No.1
Line Sensor
[Red (R) line]
[Greeen (G) line]
[Blue (B) line]
[Black & white (B/W) line]
F-2-5
2-4