Toshiba e-STUDIO556 Service Manual page 110

[ 2 ] e-STUDIO557/657/757/857
[A] Original size detection procedure
Original sizes are detected with the combination of a CCD and the automatic original detection sensors.
A size in the primary scanning direction is detected by the CCD while that in the secondary one is
detected by the sensors. 2 platen sensors (S53 and S54) serve to detect the RADF position.
A
A: RADF fully opened
When the platen cover is fully opened, an original size is not detected.
B: RADF opened by 20 degrees - Detected by platen sensor-1 (S53)
When this status is detected, the exposure lamp of the scanner emits light. This emitted light
is reflected by the original and read to the CCD as original size data. A size in the primary
scanning direction can be detected by the intensity of the reflected light.
C: RADF closed - Detected by platen sensors-1 and -2 (S53 and S54)
When the RADF is fully closed, this situation is detected by platen sensor-2.Then automatic
original detection sensors-1 and 2 detect a size in the secondary scanning direction (and the
presence/absence of an original by their positions).
As for the LT series, two automatic original detection sensors detect a size in the secondary
scanning direction due to the original size.
e-STUDIO556/656/756/856/557/657/757/857
OUTLINE OF THE MACHINE
A4 Series: S1
LT Series: S2
B
S54
S53
Fig. 3-44
3 - 64
LT Series: S1
C
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