Description Of Block Diagram - HP LP2065 Service Manual

1. Video Controller Part & Display Data Transmitter Part.(MST9251A)
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 205MHz.
This part consists of the Scaler, DDR-RAM IC which stores program data, Reset IC.
The Scaler gets the video signal converted analog to digital, interpolates input to 1600 X 1200 resolution signal and
outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip 'MST9251A' by M-star.
This part transmit digital signal from the Scaler to the receiver of module.
2. Power Part.
This part consists of the 3.3V, 2.5V and 1.8V regulators to convert power which is provided 5V in Power board.
18V is provided for LCD panel .
Also, 5V is converted 3.3V, 2.5V and 1.8V by regulator. Converted power is provided for IC in the main board.
3. MICOM Part.
This part consists of EEPROM IC which stores control data 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.

DESCRIPTION OF BLOCK DIAGRAM

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