UP-3300 (serv.man16). Service Manual - Sharp EPOS Service Manual (repair manual). Page 16

5) Correction points are displayed

The correction points are displayed.

All of the nine correcting points are displayed as follows using the
mark "+". The "+" mark is 18 by 18 dots with 2 dots thick.

6) Correction points are input

Arbitrary correction points are input. Coordinate data correspond-
ing to its input are output from the touch controller. Note the data
are those of the initial coordinates. (Refer to the table below.)

The point from where the finger leaves the touch panel is defined
as the correction point input position (OFF position).

The data on the nearest correction point is checked, and if almost
appropriate, (regarding data of the initial coordinates, within +/-
100 dots and +/-5mm in size) the command "correction data set"
is issued to the controller. When the panel is released and it is
possible to correct with the panel touched, the mark "+" turns
green.

If the input coordinates are very far from the correction point, it will
be neglected. If the command "correction data set" is terminated
normally, the mark "+" at the correction point turns black.

The input coordinate data are those of the initial coordinates, and
the relation to the correction points is as follows:

The data of the initial coordinates of correction points

393, 402

2080, 402

3767, 402

393, 2048

2080, 2048

3767, 2048

393, 3697

2080, 3697

3767, 3697

7) Step 6) is repeated for the nine correction points.

Correction is performed in an arbitrary order. At first all of the nine
points are displayed in white and they turn black as corrected.

8) After all of the points are corrected, the command "correction

mode end" is issued to the controller.

The maximum coordinates are (4096, 4096).

9) The display mode is returned to the text mode.

*

If the power supply is turned off during correction, the following
messages are displayed and all the steps are started over again.

Calibration failed.

Touch the panel to try again

Calibration flow

4. Touch panel/VGA coordinates
•

Touch panel configuration (unit: mm)

•

Touch panel coordinates

(16,14)

(320,14)

(624,14)

(16,240)

(320,240)

(624,240)

(16,465)

(320,465)

(624,465)

18 dots

18 dots

VGA Display

N

Y

Y

N

N

Y

N

Y

N

Y

Nine correction points are
displayed on VGA screen

Correction mode

Panel pressed?

Panel pressed?

Not-yet corrected

point +/-100?

Correction error?

Correction point is thined

All of nine points

finished?

Coordinates are obtained
from touch panel controller

Coordinates are obtained
from touch panel controller

Correction data set

Correcting point>corrected

Correction mode end

172.9(y2)

14.5(y1)

187.4(y)

18.2(x1)

229.4(x2)

243.8(x)

(640,480)

(4096,4096)

(4096,4096)

(0,0) Initial coordinates

(0,0) Touch panel coordinates (4096x4096)

(0,0) VGA coordinates

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