Circuit Operation Theory - Acer X193HQ Service Manual

6.2 Circuit Operation Theory

I. Introduction:
X193HQ is a 18.5 inch and 24bits color TFT LCD monitor, which can support the resolution
up to 1366x768. 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 10000:1. It
also offers OSD Menu for users to control the adjustable items and get some information about this
monitor.
II. Block diagram
X193HQ consists of a main body and a stand (base). The main body contains a AUO
TFT LCD module with 2 CCFL lamps, 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 X193HQ LCD monitor
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