Canon iR6570 series, Service Manual

Page: 139 / 684

Chapter 5
5-1
5.1 Construction
5.1.1 Specifications, Controls, and Functions
0008-7496
The specifications, controls, and functions of the machine's original exposure system are as follows:
T-5-1
5.1.2 Major Components
0008-7497
The major components of the original exposure system are as follows:
T-5-2
Item Description
Scanning lamp xenon lamp
Original scanning book mode: by moving the scanner
ADF mode: by moving original
Original reading
resolution 600 x 600 dpi (main scanning x sub scanning)
Halftone 256 gradations
Scanning position
detection by scanner HP sensor
lens single-focal point, fixed type
Magnification [1] in platen mode: 25% to 400%
main scanning direction: image processing by controller block
sub scanning direction: scanning speed variation (No. 1 mirror
base; 100% or higher)
in combination with image processing by reader block (50% or
higher and lower than 100%)
in combination with image processing in reader block and
controller block (lower than 50%)
[2] ADF mode: 25% to 200%
main scanning direction: image processing in controller block
sub scanning direction: original movement speed variation (50% or
higher); in combination with image processing in controller block (lower
than 50%)
Scanner drive control No. 1/2 mirror base: control by pulse motor
Scanning lamp control [1]activation control by pulse motor
[2]error detection control
Original size detection [1]book mode
sub scanning direction: by reflection type sensor
main scanning direction: by CCD
[2] ADF mode
main scanning direction: by slide guide in ADF
sub scanning direction: by photosensor in ADF
Item Notation Description
Scanning lamp LA1 xenon lamp (90,000 lx)
Scanner motor M501 2-phase pulse motor (pulse control)
Reader Cooling fan FM501 cools the reader block
ADF open/closed sensor 1 PS501 detects the state (open/closed) of the ADF; at 5 deg