LG FlatronL204WT, Руководство по обслуживанию

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DESCRIPTION OF BLOCK DIAGRAM
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 136MHz in L194WT/WTM/WTQ case(146MHz In L204WT/WTM/WTQ
CASE).
This part consists of the Scaler, ADC convertor, TMDS receiver and LVDS transmitter.
The Scaler gets the video signal converted analog to digital, interpolates input to 1440 X
900(L194WT/WTM/WTQ),1680X1050(L204WT/WTM/WTQ) resolution signal and outputs 8-bit R, G, B signal to
transmitter.
2. Power Part.
This part consists of the one 3.3V, and one 1.8V regulators to convert power which is provided 5V in Power board.
12V is provided for inverter, 5V is provided for LCD panel and micom in L194WT/WTM/WTQ case
15V is provided for inverter in L204WT/WTM/WTQ case
Also, 5V is converted 3.3V and 1.8V by regulator. Converted power is provided for IC in the main board.
The inverter converts from DC12V to AC 700Vrms and operates back-light lamps of module in L194WT/WTM/WTQ
case.
The inverter converts from DC15V to AC 700Vrms and operates back-light lamps of module in L204WT/WTM/WTQ
case.
3. MICOM Part.
This part is include video controller part. And this part consists of EEPROM IC which stores control data, Reset IC and
the Micom.
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.