Original Exposure System; Overview - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

Original Exposure System

Overview

■ Reader Specifications
Item
Photo conductor
Scanning of original
Reading resolution
Number of gradations
Maximum document size
Magnification ratio
Reading Sensor
Original size detection
■ Basic Configuration
● Reader Parts Configuration
[4]
[3]
Key No. Name
[1] Scanner Unit
[2] Scanner Unit HP Sensor
[3] Copyboard Cover Open/Closed
Sensor (Front)
[4] Copyboard Cover Open/Closed
Sensor (Rear)
LED
At copyboard reading:
Scanning by moving Scanner Unit
600 dpi x 600 dpi
256 gradations
At copyboard reading:
297 mm x 431.8 mm
25% - 400%
B&W : Scan magnification (skipping of 2 vertical scanning lines: 25% to 50%)
Color : Digital magnification
Horizontal scanning direction:
Image processing by the Main Controller PCB
Vertical scanning direction:
Image processing by the Main Controller PCB
4 lines (R, G, B, B/W)
Horizontal scanning direction:
Detection by the Reading Sensor (Scanner Unit)
Vertical scanning direction:
Detection by the reflection sensor (Original Size Sensor (AB) or Original Size Sensor (Inch))
[6]
[5]
[2]
Symbol
-
PS_A1
PS_N1
PS_N2
Specification/Function
[8]
[7]
[9]
[1]
Function/Specification
Image reading, analog image processing
Scanner Unit home position detection
ADF open/close detection (closing of the ADF is detected at 5 de-
grees)
ADF open/close detection (detection of timing for size detection at 15
degrees of ADF opening/closing)
38
2. Technology
[10]