Description Of Block Diagram - LG M2343A Service Manual

1. Format Converter (MST9883C)(U603)
This IC contain A/D converter, Pre-amp and PLL circuit that converting
Analog video signal(0.7p-p RGB) to digital signal.(656 Format)
2. Power Supply Block DC-DC Converter (U313)
This is TC DC Voltage (24V->5V) Main Control system from AC Adator
3. DC/DC Converter block
DC/DC Converter convert the input 5V,15V to proper 3.3V,5V,12V for
Main control system.
For shooting heat trouble, we use the DC/DC converting IC
4. Audio Amplifier (MPS7720)(U201,U202)
This block is composed of MPS7720 and peripheral device
The function of the audio amplifier is that to amplify audio L / R signal transmitted from audio decoder. The audio signal is amplified
according to pre-defined DC volume control curve. Also, headphone amplifier (TPA6110) is controlled through line-out
5. Audio / Video / IF Decoder(U501)
This block is composed of UOC III and peripheral devices.
Micom controls this IC through IIC Line.
1) Video Decoder
This Block Selects input Video signals (like CVBS, Y/C, SCART RGB) and output RGB signal.
On decoding, We can control signal like Contrast, Brightness, Sharpness, Color, tint signals including Adaptive Comb Filter
2) Audio Decoder
This block analyzes audio input signal through A/V Jack and PC audio and Tuner IF.
The analyzed signals transmitted to audio amplifier (MPS7720)
On decoding, We can control signal like Bass, treble.
3) IF Decoder
This block can change IF signal to audio and video signal that transmitted to Video/audio decoder.
6. Video Signal Processor
It is composed of MST5151A(U401)
MST5151A includes A/D Converter and LVDS Transmitter
MST5151A is directly Inputted Analog and Digital Signal or Video Signal from Video Decoder
This Signal is converted into compatible Signal by MICOM's control and then MST5151A transmit it to LCD Module.
7. TUNER(TU701)
Micom controls this IC through IIC Line.
TUNER makes IF and transmits IF signal to UOC III

DESCRIPTION OF BLOCK DIAGRAM

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