Help with Marantz 2270

sda2mike
sda2mike Posts: 3,131
edited July 2006 in Electronics
my 2270 is currently on the disabled list. the right channel is all scratchy. i'm trying to see if i can run the pre outs to the input of a sonic t amp, just for testing. i've been wanting to upgrade power, if the preamp on the marantz works, i'm back in biz...then i need an adcom 545:D THANKS!
Post edited by sda2mike on
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  • Polkersince85
    Polkersince85 Posts: 2,883
    edited July 2006
    Scratchy means dirty, hum ,smoke or nothing means trouble. Sounds like you just need to clean the pots and rca's with Caig's or tuner cleaner.
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  • jcaut
    jcaut Posts: 1,849
    edited July 2006
    I'll agree with the above, but here's another possibility that I ran into with an older Pioneer integrated: I can't remember if the Marantz uses a relay that disconnects the speakers for a few seconds after power-up or not (pretty sure it does), but my Pioneer does, and the contacts in that relay were dirty. Apparently one channel was worse than the other, and it produced a scratchy, sort of intermittent kind of sound, ESPECIALLY for a few minutes after the unit was powered up. I removed the relay (soldered in), took it apart, cleaned the contacts, gave them a shot of Pro Gold for good measure, and reinstalled the relay. Since then I haven't had any trouble with it.

    Jason

    P.S. I would recommend against using just any tuner cleaner. Get good stuff, like Caig.
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  • sda2mike
    sda2mike Posts: 3,131
    edited July 2006
    that could be it! i didn't mention that it makes the scratchy noise in any volume position. the controls have always been quiet. can i clean the relay while it's still attched? THANKS!
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  • jcaut
    jcaut Posts: 1,849
    edited July 2006
    As far as I know, relays are generally meant to be replaced and not repaired, HOWEVER- Most of them seem to have a plastic cover that's held on by little tabs or ears and can be removed to expose the "guts". That's the way mine was. I had to remove it from the PCB in order to remove the cover. Once it was out I just gave the contacts a shot of Deoxit and a wipe with a lint-free cloth. And like I mentioned, a quick coat of ProGold for good measure.

    One of the ways that I discovered the problem was with the relay was to tap on it. I could make the scratchy sound worse or eliminate it entirely depending on where and how I tapped on it.

    Jason
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  • sda2mike
    sda2mike Posts: 3,131
    edited July 2006
    Thanks for your help!:D
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