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There are currently no product reviews.
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very helpfull
circuit diagram and sparepart list available
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Very good reproduction (copy) of original manual. Didn't have a parts list, but schematic was completely labeled with parts. Complete instructions on how to adjust mechanical functions of the 8-track deck. Well worth having and at a very reasonable cost.
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It's a full manual. All the parts are in there. I haven't found the problem yett, but I am working on it; hope I can rebuild the part myself. To make it more secure and unbreakable this time. Because the part has failed several times before and costs a lot to let it be repaired.
Thanks so much for this rich illustrated and parted manual.
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I downloaded the document. The manual was complete, well scanned and everything was legible. I could zoom in see what I needed to know. There's not much more that you can ask.
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It was complete service manual with all needed service informations. Thanks.
Pin No. 50 58 60 61 62, 66, 70, 74, 78 63, 67, 71, 75, 79 64, 65, 68, 69, 72, 73, 76, 77
Terminal VSS3 EA13 EWEB EA14 VSS2 VDD2 PA0 ~ PA7
In/Out In Out Out Out In In Out Ground (0 V) source
Function Not used Write enable signal output for the effect RAM Not used Ground source +5 V source LED segment signal output
DAC (IC102: 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 IC102 UPD6379GR R OUT SI Word clock LRCK WCKO Bit clock CLK Data SO DSP LSI101 HG51B227FB Data 1K SI Word clock WCKI LRCK Bit clock BCKI 47K 22K BCK SO SCK1 CPU LSI105 UPD912GF-3BA
FILTER BLOCK
Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms.
AVDD AVDD 2SC1740SQ 2SC1740SQ 1K 1K 1K 50V0.22µ
C332(H)
From the DAC
To main volume
10V22µ 470 C333(H) AG AG AG
AG
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