14
Working principle analysis of the unit
The analog and digital RF signal received by antenna will be sent to integrative tuner
TUNER1(TD1636AF, contains HF and IF amplifier circuits), which selects appropriate channel and
sends the selected IF signal to the next level by the control of SDA, SCL.
The analog RF signal sent to tuner, via high amplify and mixed frequency to get IF signal VIF.
Then it will be divided into two ways, one way will be sent to acoustic surface-wave ZJ1 to IF filter
and get better IF characteristics, then it will be sent to NJ2(M61111FP) through pin20, 21 to do
intermediate amplification, phase-locked loop VCO and synchronous wave detection and output
VIDEO-TV(ATV) from pin1; another way will be sent to acoustic surface-wave JZ4 to IF filter and
gent better IF characteristics, then it will be sent to NJ2(M61111FP) to do intermediate amplification
and wave detection and output SIF from pin10.
The digital RF via high amplify and mixed frequency in the tuner, output deferential digital IF
signal from pin10, 11, the signal will be sent to NJ02(MSD809) to do intermediate amplification and
demodulation, then demodulate the transform stream TS which contains video/audio and other
information.
ATV, SIF, TS, audio/video signal of AV1, AV2, S-VIDEO and VGA; YPbPr video signal selected
by switch NB5(PI5V330) from YPbPr1 and YPbPr2; YPbPr audio signal selected by switch NB09
(HEF4052) from YPbPr1 and YPbPr2; HDMI audio/video signal selected by switch NA4 (PS321)
from HDMI1, HDMI2, HDMI3; all of the signals will be sent to the main IC NC1(MSD119CL) switch
select, video decode and process.
In MSD119CL, TS of DTV via TS demultiplex, distinguish the different programs and pick-up
the corresponding audio /video stream and data stream, after MPEG-2 uncompress, video coder
and audio D/A transform, recover the analog video signal YCbCr and audio signal L/R.
AV, S-Video and ATV output from M61111FP will be sent to MSD119CL video switch, A/D
convert and digital decode. The video selected by switch embed in MSD119CL will be sent out in
two ways: one is sent to decode and process; the other is AV OUT.
All of the video data (include DTV video) via switch select, video decode and process will be
sent to MSD119CL to do D/A transition, image scale, OSD superposition, then LVDS conversion to
signal acceptable for LCD panel, namely four pairs of low differential signal and one pair of clock
signal, then it will be sent to LCD panel for picture display.
All of the audio signals will be sent to MSD119CL to do audio switch selection and sound
effect processing, then output L/R to sound amplifier NV10 (R2S15112FP) amplifying to speaker.
The audio L/R also sends to AV OUT.
The unit is control by the MCU built in MSD119CL, it connects tuner,MSD809 and E2PROM through
IIC bus line and controls the whole unit working.
Содержание NS-LCD37HD-09
Страница 1: ...NS LCD37HD 09 LCD TV SERVICE MANUAL LC 37HV41 No 9237HV4111 Ver 1 0 ...
Страница 12: ...10 Click the follow Icon of Read to Select the update software for Dynex ...
Страница 13: ...11 Select Open Icon Then will appear the follow picture 9 Click the Icon of Auto Open ...
Страница 20: ...18 ...
Страница 22: ...20 ...
Страница 23: ...21 ...
Страница 24: ...22 4 PS321 ...
Страница 26: ...24 ...
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Страница 41: ...APPENDIX B Exploded view LC 37X41 ...
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