Description Of Block Diagram - IBM T541 Service Manual

1. Input signal switching part.
There are two inputs which are analog and digital input.
They come from each 15 pin D-Sub and 24 pin DVI-D connector.
2. 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 80MHz.
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.
3. Display Data Transmitter Part.
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the one 5V, two 3.3V and one 2.5 regulators to convert power which is provided 12V, 5V
in Power Board.
3.3V is provided for LCD panel and inverter, 5V is provided for Micom.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.
5. MICOM Part.
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.
6. Inverter
The inverter converts from DC12V to AC 700V and operate back-light lamp of module.

DESCRIPTION OF BLOCK DIAGRAM

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