Acer H233H Product Service Manual page 58

III. Circuit Implementations:
A.) THE MAIN BODY:
A-1.) Interface board block diagram :
(a) Circuit operations:
The scaling IC has OSD and auto detecting input timing functions. OSD offers adjustable
functions to the end-users. Auto detecting timing function can detect change modes. It
outputs the digital R-G-B data, pixel clock and control signal to TCON of the LCD module. A
MCU, build in scaling IC (Realtek2482D), is responsible for the system processing. There is
one external storing unit, 24C16 is used to store the OSD function data and user preset
timings.
(b) IC introduction:
1.) Realtek2482D SCALER IC:
Realtek2482D series products are all-in-one LCD monitor controller with analog (RGB),
DVI and video inputs, supporting UXGA/ WXSGA+WXGA+/SXGA(optional),and integrate
Realtek high performance ADC, scaling engine, LVDS Tx, and so on. Moreover, all
products are pin compatible in LQFP 128-pin package to save cost and make the design
easier. The RTD also includes an ITU656 video format input port with color space
converter that makes it an attractive solution for low cost MFM and TV applications. The
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