Canon iR7086, Service Manual

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Chapter 5
5-15
scanning lamp: off
original sensor: off
F-5-31
F-5-32
5.3.4.4 Overview of Operation
0010-7901
iR7086
1. In a Wait State
No. 1 mirror base: at shading position
scanning lamp: off
original sensor
F-5-33
2. ADF Being Opened
No.1 mirror base: moves to a specific point of original detection
scanning lamp: off
original sensor: off
F-5-34
3. ADF Being Closed
No. 1 mirror base: at point of original detection
scanning lamp: off -> on
original sensor: original detection operation
- When the ADF is at 25 deg or lower, the external light within the width of any original is kept out of external light, thus causing the machine to assume the
absence of an original at points of external light detection (external light search operation).
The ADF open/closed sensor 2 identifies the state as being "closed," and the machine starts original size detection.
Here, B5, B4, A4, and A3 are eliminated from the list of possible sizes.
- When the external light search is over, the machine turns on the xenon lamp for the main scanning lamp, and checks the CCD (4 points) for external light. For
sub scanning direction, the machine starts to operate the original sensor.
F-5-35
1
A B
2
A B
3
A B
4
A B
1
A B
2
A B
3
A B
Original
size
A3
B4
A4R
A4
B5
B5R
A5
B6
absent
Original
sensor 1
Point of CCD
detection
AB-Configuration
Original
size
11"x17"
LGL
LTRR
LTR
STMTR
STMT
absent
Point of CCD
detection
Inch-configuration
:changed
Original
sensor 3
:unchanged
CCD point of original detection
Scanning lamp
Original sensor
Reader unit
ADF
Point of detection 1
Point of detection 2
Point of detection 3
Point of detection 4
Platen
glass
(external
light)
(external
light)