Circuit Operation Theory - Acer X193HQL Product Service Manual

6.2 Circuit Operation Theory

I. Introduction:
X193HQL is a 18.5 inch Wide and 24bits color TFT LCD monitor, which can
support the resolution up to 1366 x 768. It has VGA input and compliant with VESA
specification to offer a smart power management. The monitor has DDC/CI function to
make the monitor communicate with PC by Acer ADM DDC/CI software, and also it
has ACM function to let the monitor contrast ratio up to ?:1. It also offers OSD Menu
for users to control the adjustable items and get some information about this monitor.
II. Block diagram
X193HQL consists of a main body and a stand (base). The main body contains a AUO/
LGD/SEC TFT LCD module with LED Backlight, a power board (includes AC/DC 、
DC/DC 、 inverter and panel power source), a control board and an interface board.
The block diagram is shown as below.
Fig. Block diagram for X193HQL LCD monitor
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