Toshiba e-STUDIO520 Service Manual page 137

4) Original size is determined by the combination of the signals output from each detection point. Com-
bination charts for size determination of A4 series and LT series are as followed.
[A4 Series]
Size
APS-1
judgement
A3 0
A4 0
B4 0
B5 0
A4-R 1
A5 1
B5-R 1
A5-R 1
[LT Series]
Size
APS-2
judgement
LD 0
LT 0
LG 1
LT-R 1
ST 1
ST-R 1
Code Output signal
1 H
0 L
* When the APS operation sensor is OFF;
• The following points are determined by the output signals from APS sensors
- Size (The combination of the signals satisfy the above chart)
: Size is displayed on the control panel and an appropriate paper and reproduction ratio are
selected.
- Size retention (The combination of the signals do not satisfy the above chart)
: Retains the latest original size recognized (or no original state) until a new paper size is rec-
ognized.
- No original (output from all the sensors are "1".)
: Reproduction ratio and paper size are not selected.
• Size change is always observed and detected.
• Carriage-1 stays at the standby position even if the reproduction ratio changes corresponding to
the change of the original size.
* When the APS operation sensor is ON;
Retains the latest original size (or no original state) recognized right before the APS operation sen-
sor is turned ON regardless of the state of the APS sensor output signals.
March 2005 © TOSHIBA TEC
APS-2 APS-3
0 0
0 0
1 0
1 0
1 0
1 0
1 1
1 1
APS-3 APS-C
0 0
0 0
0 0
0 0
0 1
1 0
Original
Not available
Available
6 - 13
APS-C APS-R
0 0
0 1
0 0
0 1
0 0
0 1
0 0
0 1
APS-R
0
1
0
1
1
1
e-STUDIO520/600/720/850 SCANNING SECTION
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