LG Flatron M1510A (M1510A-BZB.AN**LF), Service Manual

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DESCRIPTION OF BLOCK DIAGRAM
1. Power Supply Block (LIPS)
1) M1710A / 1910A
This Block Generates DC Voltage (5V,15V) to Main Control system from AC Power (100-240 V, 50/60 Hz, 1.0A)
Also it has the inverter function that converts input voltage to AC Rms value for the LCD lamp.
2) M1510A
This Block Generates DC Voltage (5V,12V) to Main Control system from AC Power (100-240 V, 50/60 Hz, 1.0A)
Also it has the inverter function that converts input voltage to AC Rms value for the LCD lamp.
2. DC/DC Converter block
1) M1710A / 1910A
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.
2) M1510A
DC/DC Converter convert the input 5V,12V to proper 3.3V,5V,12V for Main control system.
For shooting heat trouble, we use the DC/DC converting IC.
3. Audio Amplifier
1) M1710A / 1910A
This block is composed of TPA3005D2 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.
2) M1510A
This block is composed of TPA2000D2 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.
4. Audio / Video / IF Decoder (VCT49xy)
This block is composed of VCT49xy and peripheral devices.
1) Video Decoder
This Block Selects input Video signals (like CVBS, Y/C, SCART RGB) and output RGB signal.
A 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.
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.
4) Micom
This block controls each IC through IIC communication line.
5. Video signal processor (Scaler IC)
It is composed of gm2221.
This IC includes A/D Converter and LVDS Transmitter.
This IC is directly Inputted Analog Signal and transmits it to LCD Module.
6. Switch IC (BA7657)
It is composed of BA7657.
This IC selects between D-sub RGB signal and VCTi RGB signal, and it transmits the selected signal to video signal
processor(gm2221).
7. TUNER
Micom controls this through IIC Line.
TUNER makes IF and transmits IF signal to VCT49xy.