Canon Duplex Color B1 Service Manual page 9

2
Reader - Technology > Basic Configuration > Parts Configuration > Scanner Unit
Basic Configuration
Parts Configuration
■ Major Electrical Parts
Reader controller PCB
(PCB1)
DADF
open/closed
sensor 2
DADF
(SR3)
open/closed
sensor 1
(SR1)
Scanner unit
exhaust fan (FM1)
Scanner unit
home position sensor
(SR2)
Scanner unit
2 Reader - Technology > Basic Configuration > Parts Configuration > Scanner Unit
Scanner motor (M1)
Original size sensor 2
(CF2)
Original size sensor 1
(CF1)
Scanner unit
cooling fan (FM2)
Component part Symbol
2 phase pulse motor: pulse control
Scanner motor M1
Scanner unit exhaust fan FM1 Exhaustion of scanner unit
Scanner unit cooling fan FM2 Cooling of scanner unit
DADF open/closed sensor 1 SR1 DADF open detection (DADF is detected at 5 degree)
Scanner unit HP sensor SR2 Scanner unit HP detection
DADF open detection (size detection timing is detected
DADF open/closed sensor 2 SR3
when DADF is open at 25 degree)
Original size sensor 1 Size detection in vertical direction (AB type)
CF1
Original size sensor 2 Size detection in vertical direction (INCH type)
CF2
Image reading, analog image processing
Scanner unit ---
Control of entire reader, digital image processing
Reader controller PCB PCB1
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 through
the 3 folding mirrors and 4 free curvature mirrors.
Reading sensor
Black & white (B / W) line
Red (R) line
Greeen (G) line
Blue (B) line
LED lamp unit
Scanner unit PCB
2-2
Function/specification
LED (light source)
Free curved mirrors
Reading sensor Turndown mirrors
Free curved mirrors Turndown mirrors
2-2