Original Size Detection; Outline; Original Tray Width Sensor; Original Width Detection Sensors-1,-2,-3/Original Registration Sensor - Toshiba e-STUDIO 5540C Service Manual

[ 2 ] Original size detection

The original tray width sensor, original registration sensor, and original width detection sensors-1, -2
and -3 work in combination to detect the size of originals.
[ 2-1 ]

Outline

When an original is placed on the original tray, the width of the original is detected by the positions of
the original width guides. Then the original width sensors -1 and -2 and the original length detection
sensor detect the size of the original being transported. Based on the detection result of these sensors,
the size of the original is finally determined.
[ 2-2 ]

Original tray width sensor

The original tray width sensor detects the width of an original placed on the original tray.
It is detected by the brush attached to the rack moving on the original tray width sensor, which is a
board with the different length of the patterns written.
This brush is moved as the original width guide is moved. Signals (TWID0S, TWID1S, TWID2S) are
opened and shorted to SG by this movement.
The combination of these short (= low level) and open (= high level) can determine the width of the
original.
Sizes detectable in combination of these open and short of the signals are as follows:
TWID2S TWID1S
H H
H L
H L
L H
L L
H (= high level): Open
[ 2-3 ] Original width detection sensors-1, -2 and -3 / Original registration sensor
The size of the original is determined by the detection performed in combination of the original width
detection sensors-1, -2 and -3 and the original registration sensor, as well as the detection performed
by the original tray width sensor.
Sizes detectable in combination of these sensors are as follows:
A4series: (08-9000: 0 or 2)
Original tray Original tray
width sensor sensor
- -
- -
B5/B4 -
-A4-R/FOLIO ON
OFF
- -
- -
- -
- -
- -
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
OUTLINE OF THE MACHINE
Original width size
TWID0S
(LT series)
L
H
L LD / LT
L 8.5x8.5 / LT-R / LG / 13"LG
L COMPUTER
L (= low level): Short
Original
Original
width
registration
detection
sensor
sensor-1
ON
ON
ON
ON
OFF
ON
ON
OFF
ON
OFF
3 - 116
-
ST-R
Original Original
width
detection detection
sensor-2 sensor-3
ON
ON
OFF
OFF
ON
ON
OFF
OFF
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Original width size
(A4 series)
B5-R
A5-R
A3 / A4
A4-R / FOLIO
B4 / B5
width Size
determined
ON A3
OFF LD
B4
OFF FOLIO
A4-R
OFF B5-R
ON A4
OFF LT
OFF B5
OFF A5-R