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ATI
E331.E2501.061.21.02.02
System SIRECUST 1280/1281
Bedside Monitor - Service Manual
Table 6-5.
TouchScreen Test Values
TEST POINT
PRESSED
NOT PRESSED
pin 1-5
6-140
6-140
(typical)
(typical)
pin2 > 3
20-500
20-500
(typical)
(typical)
pint
>2
resistance
pin 1
一 3
corresponding
no
pin 2 — 5
to pressure
continuity
pin 3 > 5
point
NOTE:
The
pin numbers
in Table 6-5
refer to the connector on the TouchScreen
wiring harness. See Figure 6-2.
e.
Are
TouchScreen
resistances
within specifications?
* Yes:
Reinstall the Front Panel.
If
problem
is
corrected,
proceed
to
Functional
Verification, Chapter 5.
If problem is not corrected,
replace
EEPROM
J79 on
Display Processor Board.
If
problem
is
corrected,
proceed
to
Functional
Verification, Chapter 5.
If problem is not corrected,
proceed to Step 7.
a.
Turn
power
OFF
and
allow
monitor to cool down for 2 hrs.
b.
Turn power ON. Enter the touch
values test mode
by pressing
DISPLAY TOUCH
VALUES
key
in the FIELD SERVICE menu.
NOTE:
In the touch values test mode, the
coordinate
values
of TouchScreen
key-
presses are displayed on the screen. This
test is used to determine if the values are
within specified limits.
c.
Press each corner of the screen
three
times.
If the
displayed
horizontal
or
vertical
coor-
dinates deviate from the limits
specified in Figure 6-5 by more
than 3 counts, replace Touch-
Screen, and proceed to Func-
tional Verification, Chapter 5.
Repeat
this
procedure
after
monitor
has warmed
up for 2
hours:
NOTE:
The
touch
coordinate
display
shows
the
horizontal
coordinates
(XX)
followed by the vertical coordinates(YY).
e.g. TXX YY
The
letter
"T"
(touch)
precedes
the
coordinates
when
the
TouchScreen
is
being operated.
The letter "R" (release)
precedes
the
coordinates
when
the
TouchScreen is not being operated.
* No:
Replace
TouchScreen,
and
proceed
to
Functional
Verification, Chapter 5.
4.
Do key coordinates appear to drift
over time?
* Yes:
Continue.
ㆍ No:
Go to Step 6.
5.
TouchScreen Accuracy Test:
If the ambient
light level changes,
the
touch coordinate display will be replaced
by the ambient light level preceded by the
letter "L". This display will be replaced by
the touch coordinate values of the press
of the TouchScreen.
6.
Do the LEDs on Operator Interface
Board
toggle
(change
state) for
each key press?
* Yes:
Continue.
Page 6 - 17
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