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bigdoug2005
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Joined: May 15 2007 - 6:14pm
Killed my Marantz

So I got my "new" Marantz 2270 serial no 11754 and decided it would be
a good idea to check the DC offset. One channel was at 70mV and the
other was at 30mV. Not bad, but enough to bug me since it seemed like
a simple enough fix. I found the manual online and was first going to
check the voltage on J802 like it says. Well I managed to short out
J802 to the ground (puff of smoke came from somewhere around the
middle cap). I turned it off and back on and everything seemed to work
fine so I proceeded to get the offset to 0 for both channels. Now one
channel (either one) will randomly get fuzzy and eventually die until
I crank up the volume and bring it back down. All the voltages on P800
still seem okay. Any chance it's the offset resistors that are the
problem? Could I have killed something on the filter board? It happens
on both AUX and FM, I dont have a turntable yet so I can't test the
phono input.

Monty
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Re: Killed my Marantz

The inmates at Audio Asylum would probably be able to help you out.

Elk
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Joined: Dec 26 2006 - 6:32am
Re: Killed my Marantz

Wow, that's tough.

The suggestion of checking with the inmates is a good one - there is a lot of helpful people with useful info there.

Good luck!

bigdoug2005
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Re: Killed my Marantz

Yeah, I should have left it alone, but thats just not as fun. On the Vintage Asylum forum I was told to check the "relay contact on the speaker protection circuit" so hopefully thats the problem. Ill take a look at it tomorrow.

Elk
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Re: Killed my Marantz


Quote:
Yeah, I should have left it alone, but thats just not as fun.

Of course it isn't!

Let us know what you find out when you further check it out.

Lamont Sanford
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Re: Killed my Marantz

This is beyond stupidity. You took the cover off a warranty item and started dicking around with it? Now it is just a lump of shit. Nice job, Mr. Audiophile. Go over to the Asylum and stop making stupid confessions over here. There is nothing further to check out. The Audiophile burned up his own system. Here, hold this spark plug lead while I crank the engine.

CECE
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Re: Killed my Marantz

Will you be recomending that killer tweak for all Marantzs or just that model!!! Finally someone has an AUDIBLE TWEAK!!! I say this guy is on to something! Your new name is Puffy the Tweaker!!!!!

jkalman
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Re: Killed my Marantz

This is a good lesson kids... Don't bathe in gasoline and then play with matches.

Only you can prevent forest fires.

Elk
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Re: Killed my Marantz

Guys...guys....

Tough weekend for you three?

The Marantz 2270 is definitely not in warranty. It was made in the early 1970's. It wasn't unreasonable to try and adjust it back to spec. The poor guy made a mistake. It happens.

I don't have the technical knowledge for this unit to help him. Anyone here able to provide him with useful information that will help him fix his receiver?

jkalman
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Re: Killed my Marantz


Quote:
Guys...guys....

Tough weekend for you three?

Why would you say that? I had a decent enough weekend. I just have a sense of humor about these kinds of things. Perhaps it doesn't come across as humor when it is taken in the context of the previous two posts, and not as its own statement...

Elk
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Re: Killed my Marantz

Fair enough, Jeff. On it's own your comment would have been fun. And a sense of humor when things go wrong is a good trait.

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