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OPERATION PANEL
10.3 OP-PORT
Operation
Control
Board
+5 V
+12 V
–12 V
LED DATA
S P E A K E R
DRI VER
KEY DATA
MACHINE ID
C O N T R A S T
V F F
C F L
A D R F F
S W I T C H
C O N T R O L 1
S W I T C H
C O N T R O L 2
INT2
X DATA
Y DATA
The OP-PORT 1 & 2 control the following:
1. Switches and LED Buzzer
2. Touch detection and Touch Point detection
3. Power Supply to the LCD
4. Contrast Adjustment
5. CFL (Cold Fluorescent Lamp) Power Supply inverter function
OP-PORT 2
B U Z Z E R
LED MATRIX
D E C O D E R
SW MATRIX
DIODE MATRIX
+12 V
INVERTER
+12 V
R E F V O L T A G E
GENERATION CIRCUIT
A N A L O G
S W
C O M P A R A T O R
AMPLIFIER: X
AMPLIFIER: Y
OP-PORT 1
C O N V E R T E R
X BIAS
Y BIAS
Y ANALOG
X ANALOG
LCD I/F
2-38
10 May 1996
L C D
LED MATRIX
SW MATRIX
+5 V
D C / D C
V R
H V
T O U C H
P A N E L
A172D538.wmf
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