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Explanation for circuit operation
5-2. Sound Processing
<MSP 3421 BLOCK diagram>
As shown above, the MSP4321 outputs the main L/R to PIN27, 28 after switching NTSC
S/F external input L/R and component 1,2 (DTV, DVD compatible) L/R signals. The main
functions of the MSP3421 are volume control, equalizing and balancing. The SIF signal
that is input to #67 goes through AGC, A/D, demodulation and demphosis block. The audio
signal detected by FM is demodulated and output.
For sound output, the main L/R that is output from IC601 PIN27, 28 is input to 1601
(FDA7265) AMP PIN7, 11 and the sound is amplified from FDA7265 and connected with
L/R speaker.
6. Convergence part
6-1. Outline
This convergence supplies a constant waveform for R, G, B SUB-DY to evenly show R, G, B
screen of 55” CRT Projection TV.
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