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bad channel

  1. Y

    Pioneer SX-450 - Fix an bad channel without disassembling!

    I found a lot of useful info on this site, and wanted to post for karma. I bought a clean SX-450 with a horribly noisy right channel, and after a lot of research I tried this method of cleaning the power contacts in the black/grey box. Surprisingly this fixed my issue!! I did this without...
  2. EnzoFerenzo

    marantz 2238b power main board transistor

    I am looking for a suitable replacement for the thermally coupled transistors, in particular Q708, part number listed in the manual is:HT315672BO. I've looked online, and it seems like an old, obsolete part. Any help getting a substitute is appreciated. I've included below part of another thread...
  3. automaat

    PIONEER SX1500-TD Dead Channel still blowing after output replace

    Hi everyone, I am a tech working in Canada. My focus is organs, synths, tape gear, etc... My weakness is Power Amps. I took this one on thinking it had a good output section and trouble in the front end. Turns out the left channel was blown. Fuse open. One output device shorted. I changed the...
    • automaat
    • Thread
    • bad channel bias pot replaced output transistors pioneer sx1500td repair
    • Replies: 20
    • Forum: Solid State
  4. BigShooter

    Receiver has dead channel

    Hi all. Hope I can get some help here again... I retired recently and took up electronics (specifically vintage audio). I'm not a tech, and have minimal knowledge, but decent skills, and a love for vintage audio. So, I got hold of an old Allied model 355 receiver (I guess it's made by Pioneer)...
    • BigShooter
    • Thread
    • bad channel dead channel distortion low volume low volume one channel weak channel
    • Replies: 26
    • Forum: Solid State
  5. BigShooter

    Dead channel with a caviat

    Hi folks. This is my first post here, so forgiveness please if I miss some needed info. I have a Lafayette LR-85 receiver that has a dead channel. It's dead no matter the input, and it's dead at the speaker and/or the head phone jack. Here is the caviat... When the unit is cold the dead channel...
  6. T

    Nikko Alpha II repair help needed!

    Hi all! This spring I picked up matching set of silver faceplate Nikko gear for a reasonable price but one channel of the amp makes a loud popping noise every few 5-10 seconds. One local shop was unable to fix the issue and the other is unfamiliar with Nikko gear and won't touch it. I have...
  7. P

    Fisher 400 Right channel out

    I have a Fisher 400 amp that has a non working right channel. It DOES work though the headphone jack though. Any tips on where to start in my troubleshooting? What are the troubleshooting implications of having both channels in headphone but not speaker? The full story: Got it in working...
    • Planedoc
    • Thread
    • bad channel fisher 400 troubleshooting
    • Replies: 3
    • Forum: Fisher
  8. grey_beard

    2216 non-B Strangeness

    Background: I picked up my first Marantz receiver yesterday, a 2216 in good physical condition but with some obvious issues. I spent 6+ hours reading and troubleshooting. I could really use some help at this point. I am a novice, but I am ready to take the plunge and I feel this receiver is as...
  9. jrob

    Ready for my first restoration - Small Sansui integrated!

    After collecting Sansui gear for the past 6-8 years i have a number of systems in great working condition that i listen to quite a bit. Unfortunately, i also have a fair number of units that despite my best efforts (cleaning and resetting specs as listed in service manuals w/ oscilloscope and...
    • jrob
    • Thread
    • bad channel integrated amp recap-repair repair help sansui
    • Replies: 4
    • Forum: Exclusively Sansui
  10. Homebrook

    Kenwood KA-9100 Bad Right Channel

    This is my first post on Audiokarma. What a great help Audiokarma is! Without all of you I would be clueless. Thanks! I bought a 9100 for cheap that had the right channel not working at all. The first thing I did was to thoroughly clean the Normal/Separate switch. That got a signal through the...
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