• Re: lost one channel on an old Onkyo amplifier

    From Ronald@21:1/5 to Shaun on Fri Aug 18 19:41:49 2023
    On Saturday, August 8, 2015 at 11:15:10 PM UTC-4, Shaun wrote:
    "Tim R" wrote in message
    news:425fdc8f-20ed-40b2...@googlegroups.com...
    I have an old and extremely heavy Onkyo stereo amplifier that I use in the basement in my workroom. I bought it years ago at a thrift shop and it's worked well for years.

    Now only one channel works. I've tried it on A and B speakers and mono, doesn't matter. Sound comes out of only one side.

    Is there anything simple this is likely to be, or is it time to set it out by the curb? (in my neighborhood nothing makes it to garbage day)

    There was a thunderstorm and power outage this week, but I'm not sure if it failed before or after.
    I've fixed my 5 channel Onkyo amplifier years ago; It was just cracked solder joints between the RCA connectors and the circuit board. I would suspect in your case that you may have a failed transistor or two. You have the other channel to compare the reading too. Remove the power transistors (mounted on heat sinks) and check them with an DMM on diode check, then compare them to the pair from the working side. It is probably worth the effort since Onkyo has a good name for mid quality Hi-Fi equipment. Then look on the internet for replacements or Substitutes and get a matched pair.

    Shaun
    Only a m5160 other than what I've wrote to the military why would a amp play on both yet not just one both channels work just not at the same time simultaneously.. bull shit

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  • From root@21:1/5 to Ronald on Sat Aug 19 16:10:14 2023
    Ronald <ronaldbellis85@gmail.com> wrote:
    On Saturday, August 8, 2015 at 11:15:10???PM UTC-4, Shaun wrote:
    "Tim R" wrote in message
    news:425fdc8f-20ed-40b2...@googlegroups.com...
    I have an old and extremely heavy Onkyo stereo amplifier that I use in the >> basement in my workroom. I bought it years ago at a thrift shop and it's
    worked well for years.

    Now only one channel works. I've tried it on A and B speakers and mono,
    doesn't matter. Sound comes out of only one side.

    Is there anything simple this is likely to be, or is it time to set it out >> by the curb? (in my neighborhood nothing makes it to garbage day)

    There was a thunderstorm and power outage this week, but I'm not sure if it >> failed before or after.
    I've fixed my 5 channel Onkyo amplifier years ago; It was just cracked
    solder joints between the RCA connectors and the circuit board. I would
    suspect in your case that you may have a failed transistor or two. You have >> the other channel to compare the reading too. Remove the power transistors >> (mounted on heat sinks) and check them with an DMM on diode check, then
    compare them to the pair from the working side. It is probably worth the
    effort since Onkyo has a good name for mid quality Hi-Fi equipment. Then
    look on the internet for replacements or Substitutes and get a matched pair. >>
    Shaun
    Only a m5160 other than what I've wrote to the military why would a amp play on both yet not just one both channels work just not at the same time simultaneously.. bull shit


    I've had two Onkyo receivers in the past. Strange things happened with them such
    as FM not working, one or the other channel would go out. In each case
    I put the receiver on a shelf and bought another. The first time it happened
    I had replaced the Onkyo with a newer Onkyo. After a while the new Onkyo
    flaked out and I bought a Denon. Then for some reason I connected the
    original Onkyo up and everything worked. After a while I tried the same
    thing with the second Onkyo and it also worked. My conclusion is that
    if you unplug the Onkyo and leave to so for several days it heals
    itself.

    YMMV

    --- SoupGate-Win32 v1.05
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  • From Allodoxaphobia@21:1/5 to root on Sat Aug 19 17:32:59 2023
    On Sat, 19 Aug 2023 16:10:14 -0000 (UTC), root wrote:
    Ronald <ronaldbellis85@gmail.com> wrote:
    On Saturday, August 8, 2015 at 11:15:10???PM UTC-4, Shaun wrote:
    "Tim R" wrote in message
    news:425fdc8f-20ed-40b2...@googlegroups.com...
    I have an old and extremely heavy Onkyo stereo amplifier that I use in the >>> basement in my workroom. I bought it years ago at a thrift shop and it's >>> worked well for years.

    Now only one channel works. I've tried it on A and B speakers and mono,
    doesn't matter. Sound comes out of only one side.

    Is there anything simple this is likely to be, or is it time to set it out >>> by the curb? (in my neighborhood nothing makes it to garbage day)

    There was a thunderstorm and power outage this week, but I'm not sure if it >>> failed before or after.
    I've fixed my 5 channel Onkyo amplifier years ago; It was just cracked
    solder joints between the RCA connectors and the circuit board. I would
    suspect in your case that you may have a failed transistor or two. You have >>> the other channel to compare the reading too. Remove the power transistors >>> (mounted on heat sinks) and check them with an DMM on diode check, then
    compare them to the pair from the working side. It is probably worth the >>> effort since Onkyo has a good name for mid quality Hi-Fi equipment. Then >>> look on the internet for replacements or Substitutes and get a matched pair.

    Shaun
    Only a m5160 other than what I've wrote to the military why would a
    amp play on both yet not just one both channels work just not at the
    same time simultaneously.. bull shit

    I've had two Onkyo receivers in the past. Strange things happened with them such
    as FM not working, one or the other channel would go out. In each case
    I put the receiver on a shelf and bought another. The first time it happened I had replaced the Onkyo with a newer Onkyo. After a while the new Onkyo flaked out and I bought a Denon. Then for some reason I connected the original Onkyo up and everything worked. After a while I tried the same
    thing with the second Onkyo and it also worked. My conclusion is that
    if you unplug the Onkyo and leave to so for several days it heals
    itself.

    Since you're replying to a NINE-YEAR-OLD posting,
    I'd bet the OP's problem is now solved.

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  • From root@21:1/5 to All on Sat Aug 19 22:21:38 2023

    Since you're replying to a NINE-YEAR-OLD posting,
    I'd bet the OP's problem is now solved.


    I'm here to help.

    --- SoupGate-Win32 v1.05
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