Canon IMAGERUNNER 7095 PRINTER, Service Manual

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Chapter 5
5-14
5.3.4.3 Overview of Operation <iR7105/7095>
0010-7900
1. In a Wait State
No. 1 mirror base: at shading position
scanning lamp: off
original sensor
F-5-26
2. ADF Being Opened
No.1 mirror base: moves to a specific point of original detection
scanning lamp: off
original sensor: off
F-5-27
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 (main body) 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-5-28
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)
25