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The Service Manual received was helpful. Good copy of original document.. I recomend all of my friends about this technical page.
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Perfect, complete manual, exactly what I needed. Recommended to everyone.
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Very usefull manual. From my point of view there are needs more clearables images.
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Once again owner-manual.com has saved the day for me, and come through with the manual I need. I looked other places too, and couldn't find it anywhere. Thank You owner-manual.com!!! You're the BEST!
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very good quality that can be magnified several times, and it remains readable.
For sure I will return next time the need for a service manual arise.
DAC (LSI6: UPD6379GR)
The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog waveforms and output them to each channel separately.
Synch signal SINC L OUT DAC IC6 UPD6379GR R OUT SI Word clock LRCK WCKO Bit clock CLK
2.2K 0.01 µF
SCK1 Data SO CPU LSI1 UPD913GF-3BA
Data SO DSP LSI2 HG51B277FB SI
Word clock WCKI LRCK Bit clock BCKI BCK
FILTER BLOCK
Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms.
AVDD Q107 2SC1740SQ.R
AVDD
22 �
Q110 2SC1740SQ.R 10K 150PF 270PF 10K
+
10 V22 µ 22K 1K 6.3V 1000 µ
10K 560PF
From DAC
AG
To main volume
AG AG
AG 18K 10K AG
AG
�9�
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