Q7T3(AUO Panel) LCD Monitor Service Guide
Circuit Operation Theory
1
I. Introduction:
The Q7T3-FP767 is a 17” SXGA (1280x1024) , 262 K colors(R, G, B 6-bit data) TFT LCD
monitor with multi-media function. It’s an analog interface LCD monitor with a 15 pins D-sub signal
cable and it’s compliant with VESA specification to offer a smart power management and power saving
function. It also offers OSD menu for users to control the adjustable items and get some information
about this monitor, and the best function is to offer users an easy method to set all adjustable items
well just by pressing one key, we called it “Auto key” which can auto adjusting all
controlled items. Q7T3-FP767 also offer DDC2 function to meet VESA standard.
II.
Block diagram
The Q7T3-FP767S consists of a head and a stand (base). The head consists of a LCD module
with 4 lamps, a power board (include AC/DC, DC/DC and inverter board), a control board and interface
BD. The block diagram is shown as below.
AC-DC
board
TFT-LCD module with 4 CCFL(backlight)
AC input
To
backlight
Analog RGB signals
AC
socket
Control board
DDC IC
EEPROM
MCU
gm2120
LVDS Xmtr x 2
Interface board
LVDS
D-sub
connector
Flash ROM
Power sequence
circuit
Inverter
board
III. Circuit operation theory:
A.) HEAD:
A-1.) Interface board diagram:
PW BD
AC Socket
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