Circuit Descriptions
7.
7.
Circuit Descriptions
Index of this chapter:
7.1 General Description
7.2 Main Supply
7.3 MST9B885GL
Notes:
•
Only
new
circuits (circuits that are not published recently)
are described.
•
Figures can deviate slightly from the actual situation, due
to different set executions.
•
For a good understanding of the following circuit
descriptions, please use the wiring, block and circuit
diagrams. Where necessary, you will find a separate
drawing for clarification.
7.1
General Description
This chassis supports PC digital input (via HDMI connector) up
to 1920 × 1080 60Hz mode for Full HD panel. It supports
ATV(RF) PAL and SECAM. Besides that it supports CVBS and
also YPbPr signal input from SDTV to HDTV (480i/p, 576i/p,
720p, 1080i/p) and also HDMI signal input from SDTV to HDTV
(480i/p, 576i/p, 720p, 1080i/p).
This chassis uses M-STAR MST9B885GL-1 which has
embedded ADC for HD(YPbPr)/VGA input, digital port for
HDMI/DVI decoder digital data input, SD ADC for CVBS/YC
input, video decoder, audio demodulator, audio decoder, TT
decoder, microcontroller, OSD engine and up/down scaler.
M-STAR MST9B885GL-1 is a high performance and fully
integrated IC for multi-function chassis with resolutions up to
Full HD. It is a multi-standard TV video and audio decoder.
MST9B885GL-1 supports all NTSC/PAL/SECAM standards
video decoder, Nicam/A2/FM stereo & SAP demodulation
audio decoder, LVDS transmitter, and TV decoder.
The MST9B885GL-1 embeds the 3D motion de-interlace to
generate very smooth picture quality for motion video. The 3D
comb filter also renders rich details for still image. The special
color processing engine provides favorite and natural color for
TV. To enrich the features of ATV, MST9B885GL-1 has an
built-in HDMI receiver to support digital signal in HDMI/DVI with
HDCP function, integrated with high bandwidth VGA ADC, high
resolution Video/Audio ADC, 90 dB Audio DAC and 10-bit
Video DAC.
