ViewSonic VX500 Service Manual - Page 30

System, Circuitry, Description, BLOCK

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System Circuitry Description BLOCK A. In reference of the block diagram of the monitor's circuitry shown on the previous page, the analog RGB inputs are amplified and sent through an analog-to-digital converter (ADC) to a digital signal processor (DSP) that generates digital RGB signals for controlling LCA panel. BLOCK B. A second power supply converts a single 12V supply to the various voltages needed to run the LCD panel and the inverter driving the display's backlights. BLOCK C. SYNC SIGNAL PROCESSOR. This processor determines the polarity of the horizontal and vertical sync signals, generates a fixed-polarity synchronized clock signal and provides data for use by the microprocessor in selecting circuit control parameters from EEPROM tables. ViewSonic Corporation 27 Confidential - Do Not Copy VX500-1

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System
Circuitry
Description
BLOCK
A.
In
reference
of
the
block
diagram
of
the
monitor's
circuitry
shown
on
the
previous
page,
the
analog
RGB
inputs
are
amplified
and
sent through
an
analog
-to
-digital
converter
(ADC)
to
a
digital
signal
processor
(DSP)
that
generates
digital
RGB
signals
for
controlling
LCA
panel.
BLOCK
B.
A
second
power
supply
converts
a
single
12V
supply
to
the
various
voltages
needed
to
run
the
LCD
panel
and
the
inverter
driving
the
display's
backlights.
BLOCK
C.
SYNC
SIGNAL
PROCESSOR.
This
processor
determines
the
polarity
of
the
horizontal
and
vertical
sync
signals,
generates
a
fixed
-polarity
synchronized
clock
signal
and
provides
data
for
use
by
the
microprocessor
in
selecting
circuit
control
parameters
from
EEPROM
tables.
ViewSonic
Corporation
27
Confidential
—
Do
Not
Copy
VX500-1