Need help with a 1050 Marantz

[kikook]

Hello from France.
I have a little 1050 marantz with a problem.

There is a crackling sound on the right channel :
It's not dependant of the volume
It's not dependant of any source selector
Same thing on the B speaker connector.
The crackling sound is here even if there is no source connected
When the speaker selector is on 0 (no speakers) there is no crackling sound.
The sound on the right channel is not saturated or deformed. There is only crackling sound on the music.
When I push the low filter button the crackling sound change, it's more important and the frequency change.
All pots and buttons are clean, and when I use them, no change. (exept the low filter button).


If someone have an idea...

Thanks.

[Kasra]

sounds like a job for deoxit.
need to clean the mechanism inside the receiver that allows the spekar b button to move in and out.

[kikook]

Already clean all mechanisms : no result.
Thanks for your interest.

[EchoWars]

Doesn't this have jumpers from preamp to amp? Pull them out and see what happens...that will at least tell you if the noise comes from the preamp or the amp.

[kikook]

No jumpers, little amp from marantz...

[marty-alex]

Hello kikook, hello from Czech Republic! :)

I have a bad news for you - this is propably more serious than some dirty cinch or whatever. I had a similar problem with my Pioneer SA-606 and the only reason why I kept it and repaired it was I'd already bought a matching tuner and I couldn't live without those nice VU meters... :smoke:

In my case, whole ampilifier circuit was dead - crackling sound all the time, no matter what was or wasn't connected, exactly as you say. Only for one channel, too. This meant I had to find new resistors (hope it's in English the right word) which were as similar to those used as possible (you can't get same model nowadays). Then, because these resistors were not "paired" and each one made has naturally a little different characteristics, I had to buy like ten of them or more and choose two most similar ones (take one, measure everything, test it, take another one...boring...).

Then I had to replace the original resistors, drill into the heatsink a little...nothing easy and sure pretty much risky, now I know it wasn't propably worth the time I spent doing it. But yeah, I enjoy good sound now, mint look of the amp and it was fun too. :music: Fun in it's kinda way...

So if you have a lot of time, you are not afraid of poking and maybe even destroying your Marantz friend (now non-working), go ahead... I remember it looks easy-to-replace inside 1050 with no huge heatsinks - a lot of space in the box which is not very usual for such Marantzes.

I had a good looking and fully working Marantz 1050 (sold just two months ago) and I really liked this particular amp. Far better than 1072 and IMHO even than the 1090 (yet Model 1090 has a mid-range EQ...). The sound is less distorted and warmer than when listening to the more-powered units mentioned above. It's good amp, but might not be worth repairing, sorry... :tears:

BUT THERE IS ALWAYS A HOPE it's not the same case. I hope I'm wrong, man...

I guess headphone output does have the same problem, doesn't it? Well, if it's cleaned as you say and there is no dirt inside, no rust (was it in some wet place before?) and nothing is visibly damaged or burned inside, I'm sorry but I can't see any help here.

There are many guys out there who do understand solidstate much more than I do, so maybe they could help you...

[jeffn]

you could try replacing all the fuses with heavy gauge copper wire.........


Noooo....don't do that :screwy:

[kikook]

Yes, same thing on the headphone outpout.
I stop here, I will sell it on epay for the parts.

Thnaks for the support :tresbon:

[marty-alex]

Hmm, try to sell it as a "defekt", someone might fix it, it doesn't need to be used "for parts" only. As I say, it's not really expensive to repair it. It might be just very, very time- and skill-demanding.

And you're welcome!! :smoke: