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Right channel won't play on stereo amplifier

I am currently sporting an old Hitachi HA-1800 Stereo Amplifier connected up to a radio tuner, turntable, and headphone jack for ipod/laptop playback that I bought at a car boot sale over the summer. It played fine up until a few weeks ago, now I'm only getting sound through the left channel, I swapped around the speakers and tried some speakers on the B speaker system and speakers will only play through the left channel. I currently have one speaker connected to left channel A and one connected to B to give me a mock version of stereo. I'm handy with a soldering iron, but don't really know what to look for if I open it up.
If the problem is too great I'll just dump it and pick up another, I only spent £3 on it, but the great bargain almost makes me want it to work more.
Cheers Jesse

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  • count_jessul Dec 28, 2008

    Yeah, I tried to open it up to check all the joints and everything, but there was one screw I couldn't get to in order to lift out the circuit board as far as I could see everything looked fine just very dusty, but unfortunately couldn't properly get in there to see it.


    I was recently informed by a friend as well that I can have his old amplifier that he was going to get rid of.


    So thank you very much for your help but it is now not needed.


    Thanks again.

  • Rob Duron
    Rob Duron May 11, 2010

    It sounds to me like you have run out the usual suspects so I would encourage you to open the top and look for any burnt components. electronics usual work until the smoke gets out. It also may be A loose wire. if you can post a phot of any suspect parts I would be happy to give a look.

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In old stereos the first things I look at are output transistors, solder joints and electrolytic capacitors. If you know how to solder, bad solder joints are pretty obvious. If you need a tutorial on how to spot bad solder joints, look here.

http://www.kingbass.com/soldering101.html

As for bad caps, look here. The info is aimed at computer motherboards but still helpful.

http://www.badcaps.net/pages.php?vid=5

Posted on Dec 28, 2008

  • weirdal Dec 28, 2008

    More solder info here
    http://www.elecraft.com/TechNotes/N0SS_S...


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