Description Of Block Diagram - LG Flatron L1552S Service Manual

1. Video Controller Part.
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to
the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 78.75MHz.
This part consists of the Scaler, ADC and TMDS receiver .
The Scaler gets the video signal converted analog to digital, interpolates input to 1024 x 768 resolution signal and
outputs 8-bit R, G, B signal to transmitter.
2. Power Part.
This part consists of the one regulator and one LDO to convert power.
3.3V is provided for LCD panel.
Also, 12V is converted 3.3V by regulator and 3.3V and 1.8V are provided for scaler.
Converted power is provided for IC in the main board.
3. MICOM Part.
This part consists of EEPROM IC which stores control data and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync supplied from signal cable.
The controlled data of each modes is stored in EEPROM.

DESCRIPTION OF BLOCK DIAGRAM

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