Service manual

SERVICE MANUAL LS07 chassis
6
The Constitute of the PCB is easier than LP03 chassis, all the Signal
Processing are in Main board.
1Main board Module
Main board Module is the main part of Signal Processing in LCD TV. The input
signal is Converted into uniform digital signal which can be Identified by LCM by
system control circuit. Main board Module contain two parts of signal
processing Module: Philips UOC3 process analog audio and videoo circuit
mainly, MST518 process VGA circuitsignal Format transform system control
circuit mainly. the front module can convert the video IF signal and audio IF
signal from tuner into RGB analog signal and audio signal, this part is named
analog audio and video decoding process. The RGB color from UOC is
received by MST518 and accomplish A/D convertion , output suitable digital
color signal to Drive circuit of TFT . 8051 Processor inside UOC is responsible
for co-operation the each part of works in system, and Respond to user
operation which is operated on Control panel(key-press panel Module).
2Key board Module
It is composed of 7 function keys. the user can operate the LCD TV
conveniently by using this Module.
3Remote control receiving board Module
It is composed of a work indicator light and a remote receive head. the user use
the remote control box by this module can operate the LCD TV conveniently
and know the LCD TV work condition.
4Earphone output board module
It is composed of a earphone outlet, user can Listen to by earphone
conveniently.
5Inverter board module(include inverter circuit)
The function of the inverter is supply power to light tube in TFT , and lighten
the back lamp Unit of TFT moldule, so the user can see the image on TFT.
Chapter two The function introduction LS07 chassis
LCD TV’s main IC
One The main IC of LS07 chassis
serial
number
Name model Main function
1 A1 TAF5-C2IP1RW RF tuner
2 U8U21 TDA1517AWT Audio amplifier
3 U3 MST518 AD converter and format change
4 U2 UOC(TDA15063H) Video decode and MCU control
5 Q9 Si2311DS MOS switch
6 U11U12 IRF7316 MOS switch