Working Principle Analysis
The analog and digital RF signal received by antenna will be sent to
integrative tuner TUNER2(TD1136/FV, 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 ZF3 to IF filter and get better IF characteristics, then it will
be sent to NF1(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 ZF4 to IF
filter and gent better IF characteristics, then it will be sent to NF1(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 pin16, 17, the signal will be sent to
NJ01(MSB1501L) 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 AV, S-VIDEO , VGA and
HDMI;.Component video signal selected by switch NB09(PI5V330W) from
Component 1 and Component 2, Then one of video signal selected by switch
NB10(PI5V330W) from Component and VGA . AV, S-VIDEO ,Component audio
signal selected by switch NB11 (HEF4052BT), HDMI audio/video signal selected
by internal switch from HDMI1, HDMI2, HDMI3; all of the signals will be sent to
the main IC NS01(MSD229EL) switch select, video decode and process.
In MSD229EL, 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.
ATV output from M61111FP will be sent to MSD229EL video switch, A/D
convert and digital decode. The video selected by switch embed in MSD229EL
will be sent out in two ways: one is sent to decode and process; the other is
Video OUT.
All of the video data (include DTV video) via switch select, video decode
and process will be sent to MSD229EL 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 MSD229EL to do audio switch
selection and sound effect processing, then output L/R to sound amplifier NV03
(R2S15112FP) amplifying to speaker. The audio L/R also sends to Audio OUT.
The unit is control by the MCU built in MSD229EL, it connects MSB1501L
and E2PROM through IIC bus line and controls the whole unit working.
20
Summary of Contents for DX-L37-10A
Page 24: ...23 Main Board 1 4 ...
Page 25: ...Amplifier Main Board 2 4 ...
Page 26: ...Main Board 3 4 ...
Page 27: ...Main Board 4 4 ...
Page 28: ...Power Board LC 26KT46 1 2 ...
Page 29: ...Power Board LC 26KT46 2 2 ...
Page 30: ...Power Board LC 32KT46 ...
Page 31: ...Power Board LC 37KT46 ...
Page 32: ...Power Board LC 42KT46 ...
Page 33: ...IR KEY Board ...
Page 34: ...Exploded View 33 ...
Page 36: ...35 Exploded View ...
Page 38: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 19 17 18 20 21 22 LC 37KT46 Exploded View 37 ...
Page 40: ...39 Exploded View ...
