No.1 mirror base: moves to a specific point of original detection
scanning lamp: off
original sensor: off
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.