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Marantz SD 8020 - mission impossible?

Today I finished this beautiful restoration. I use NE645B instead LM1011N and the music plays again
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paul_ral said:
Hi, I' m new on this forum and I' m a big fan of vintage Marantz from '80.
I found a SD 8020 2 speed compudeck, but isn't in a good condition. The owner told me that the cover has been lost, he sold some parts like transformer, tapehead, mic&line record level potentiometers, three switches from front panel and some knobs. He promised me new pictures of it, and ask arround 25$. I know it is a rare deck, it would be hard to find the missing parts, but i try. In the worst case i'll keep as a museum piece.
I'm waiting for your opinions and excuse for my English
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I just picked up a complete sd 8020 deck which i had professionally restored. The problem now is i am only missing one small board. Should i continue to try to find part or part out? I can post the missing part once i get home.
 
Thank you for your reply Paul. I have had difficulty figuring out how to load the picture to this thread. I loaded the picture of the needed boards to my media but don't know if you are able to view it. Kind of complicated for me the first time I guess. Thanks, Duane
 

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Looks like an opto-isolator, or LED - photo transistor pair. The board looks simple enough you can just get a prototyping board and wire one up. LED signals in, transistor leads out.
 
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