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 Post subject: National DP-350 revisiting
PostPosted: 20 Nov 2021, 02:14 
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so I have looked at this before am now trying to figure out competely what's wrong with it. the buttons don't work, doesn't take a disc and the stylus is stationary. I wonder if now there might be a transit screw that I don't know about preventing some things or maybe a dead motor or so gears not greased.
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 Post subject: Re: National DP-350 revisiting
PostPosted: 20 Nov 2021, 18:23 
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I suppose I need some lubricant for the gears but the belts are tight so I don't think that would be an issue . there is a noise so maybe the motor works. Wish there were some english sites or somebody could help to get this repaired. I hate to get rid of it since I wasted shipping on the thing and it powers on.
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 Post subject: Re: National DP-350 revisiting
PostPosted: 20 Nov 2021, 19:30 
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Wish I could help, I would just try to start with simple stuff and look at the LD repair guides, belts aren't an issue to me at this point if you can't get any other functions to work yet.

I would look at ribbon cables or even stuck motors where the gears are.

Also was this working when you got it or was it one of those listed as junk players from Japan?
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 Post subject: Re: National DP-350 revisiting
PostPosted: 20 Nov 2021, 20:41 
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I think junk but did work some when i first got it.
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 Post subject: Re: National DP-350 revisiting
PostPosted: 20 Nov 2021, 21:54 
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Ah so then if it was working I would look for capacitors or loose ribbon cables or even any wire connectors that may be loose or need to be taken off cleaned
with contact cleaner then put back on.

That's where I would start.
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 Post subject: Re: National DP-350 revisiting
PostPosted: 20 Nov 2021, 23:35 
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got as far as this so
it must have been the transit screw which was never tighthent but now once I undid that I get the noise but the door doesn't open nor does eject work.

At least my DP-330 works even though that was listed as junk.

Image
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 Post subject: Re: National DP-350 revisiting
PostPosted: 21 Nov 2021, 01:17 
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thinking and tinker some more I do believe it might work if I can ever get some lubricant /contact cleaner though I do not know which to get.
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 Post subject: Re: National DP-350 revisiting
PostPosted: 21 Nov 2021, 02:41 
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Deoxit for contact cleaner, I know some have said the white lithium grease you can get that at hardware and I think I've seen it at wallyworld.

Some have also said to use other but I can't remember.
Make sure you get that old grease off if you think that's the issue.
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