22
RRout
O
Right rear speaker output
23
LRout
O
Left rear speaker output
24
RFout
O
Right front speaker output
25
LFout
O
Left front speaker output
26 Dgnd - Digital
ground
27 Date I IIC
Date
28 Clk I IIC
Clk
ICA1 control & regulate the voltage (12Vto9V) to the ICA2.
Volume signal through ICA2 pin24 (right) pin25 (left) into audio amplifier ICA3.
2. Audio amplifier:
ICA3 (TDA1517) is an integrated class-B dual output amplifier, it contains two identical
amplifier differential input stages. The gain of each amplifier is fixed at 20 dB.
Pins 1 and 9 are right and left channel inputs respectively. Pins 4 and 6 are right and left
channel outputs which connect to two 4 OHM speakers.
Pin 8 is the mute/stand-by.
Pin 7 is the voltage input for ICA1.
C. Touch Sensor Board
1. Touch Sensor IC:
ICT1 (EM03) is an 8-Channel Capacitive Sensor. It designed specifically for touch controls.
It's provide stable sensing under a wide variety of changing conditions
.
It will project a sense field
through almost any dielectric. It is designed specifically for human interfaces, like control panels,
application lighting controls or anywhere a mechanical switch or button may be found. The device
is designed to detect touch on up to 8 point independently.
ViewSonic Corporation
Confidential
– Do Not Co
py
VX500+-1
3
5
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