Circuit Description - ViewSonic N3250wb-1G Service Manual

4. Circuit Description

Video:
The MST96889LD is a high performance and full integrated IC for multi-function LCD
monitor/TV with resolution up to SXGA/WXGA. It is configured an integrated triple-ADC/PLL,
an integrated DVI/HDCP/HDMI receiver ,a multi-standard TV video and audio decoder,a video
de-interlacer,a scaling engine,the MSTARACE-3 color engine,an on-screen display controller,an
8 bit mcu and a built-in output panel interface.With external frame buffer,3-D video decoding and
processing are fulfilled for high-quality TV applications.to further reduces system costs,the
MST96889LD also integrates intelligent power management control capability for qreen-mode
requirment and spread-spectrum support for EMI management.
Audio:
This is a stereo fully digital audio amplifier with output power which can deliver up to 2 x 16 w
to 4ohm load with 12v supply voltage. Using SCL/SDA digital contral interface,AD8256A
provides sound processing functions including volume ,bass ,treble,EQ,Mixing and Dynamic
Range control.
TUNER FEATURES
Multi-standard TV Systems broadcast reception
Especially developed for LCD-TV/PDP application
New input configuration resurts in best-in-class noise
Figure : typically 5.5dB in UHF
True 5 v device
Full frequency range from 48.25MHz TO 863.25MHz
PLL controlled tuning
True synchronous vision IF demodulator
Ultra linear FM PLL demodulator
Demodulated video output,AF sound output,second IF sound output.
nd
I2C-bus control 2 IF address for pip application
Coplies with European regulations on radiation,signal handling and immunity
Coplies to CISPR13 including am end ment and amen dment
Low profilr horizontally mounted metal 70 mmhousing
Enviromentally friendly lead-free process used
Suitable for lead-free wave soldering
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ViewSonic Corporation N3250wb-1G
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