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amp repair

  1. Subchannel

    JVC AX-Z711 service manual/ schematics

    Have a JVC AX-Z711 integrated amp that needs fixing. The STK3082 III IC had no signal on right output, so ordered a NOS and replaced. This worked, there´s now sound on both outputs. But the amp goes into protect after a few seconds. When powered OFF for a longer time, it plays for longer...
    • Subchannel
    • Thread
    • 80s amp repair amp output defect amp repair amplifier repair japanese amp repair jvc amp not working jvc ax-z711 jvc integrated amp
    • Replies: 3
    • Forum: Solid State
  2. P

    Planet Audio amp

    Hi Guys, I just purchased a HVT754 planet audio hybrid tube amp for my car. I have started it up to test it and it was draining 2.6 amps on idle, which I thought was high even with 4 x 12ax7 tubes in it (they should use approx 600mA for the heaters) I took off the case and checked all the...
  3. J

    PSB Subsonic 6 issue

    So a few years back I had to change my PSB sub transformer as I moved from the US to Ireland. I replaced the transformer with a toroidal one and all was working perfectly for a few years. A few days ago I have very little output next to zero... When I put the volume up, a rapid noise occurs, and...
    • jvoid22
    • Thread
    • amp repair psb repair subwoofer
    • Replies: 0
    • Forum: DIY
  4. JayPare

    Transistor replacement (2SC828 and 2SC1685)

    Hi all, I'm looking for replacement for those to transistor for my project: 2SC828 2SC1685 I found the following replacement for 2SC828: KSC1815 (Digikey has KSC1815YTA, never sure what the letters at the end means) BC548BU (Digikey has it) And the following replacement for 2SC1685...
    • JayPare
    • Thread
    • amp repair japanese electronics transistor transistor equivalent
    • Replies: 2
    • Forum: Solid State
  5. JayPare

    Technics SA-160 repair advise

    Hi all, I in the process of bringing back to life a Technics SA-160 I found at the thrift store for 5$. I'm repairing it for my personnal knowledge, so I'm thinking of selling it and give the profit as a donation to the website. Right now it's not powering on. I opened it and noticed the...
    • JayPare
    • Thread
    • amp repair ampifier audio repair repair transistor
    • Replies: 24
    • Forum: Solid State
  6. K

    Need help looking for a Zener Diode

    im repairing a Luxman L-210 that i picked up at a garage sale. turns out that one of the resistors and zener diodes shorted but when i looked up the parts list in the service manual it says "HZ22-2L Zener" for diode D-112 (number on the amp board). I've tried searching up the description and the...
    • Kevin6860
    • Thread
    • amp repair diode luxman replacement part
    • Replies: 9
    • Forum: DIY
  7. Sam Hopkins

    Help with Bogen DB10 amp making clipping sound

    Hello everyone, I recently purchased a Bogen DB10 tube amp which looks like it's been taken very good care of and rebuilt at some point. According to the manual, in order to run a turntable through the high or low mag inputs, a cable must be connected from the pre-amp out to the amp input. When...
  8. Andrew Heck

    Do I Have A Phono Preamp / Power Amp Mismatch?

    The set-up is this: A series of unfortunate events this afternoon left me without a phono stage which is an unacceptable condition. As far as I can tell, there is no recourse in this town when one finds themselves in my position that does not involve waiting on shipping except Guitar Center and...
    • Andrew Heck
    • Thread
    • amp repair compatability help me please phono phono pre amp phono pre-amp phono preamp
    • Replies: 7
    • Forum: Turntables
  9. mhinsda

    Sansui AU 9500 -static loud!

    turned on my au9500 tu 9500 playing as normal. Then static starts.. then loud then very LOUD. Checked all connections turned volume all way down. Powered back on and super loud static buzz( saved my speakers and powered off right away) causes - intermittent because this happened a couple of...
  10. MadcapLaughs

    Yamaha A1 integrated amp (phono issue)

    Hello, I just purchased a Yamaha A1 integrated amp. While the line stages sound great I'm noticing some problems in the phono stage. 1. The gain levels to achieve slightly loud sound output means I am turning the knob past 12 o'clock each time. (High output MM cart used). I have efficient...
    • MadcapLaughs
    • Thread
    • amp repair help help needed integrated amp phono vintage amp yamaha yamaha a-1
    • Replies: 76
    • Forum: Yamaha
  11. 1

    Pioneer Amp Restoration

    Hello All, First time post here. I recently threw the dice and picked up a Pioneer SA8500II at the Sally Ann for $10. Turns out it isn't currently working. I have looked up the reviews on this amp, and figure it might be worth having it restored. I have no idea how much a restoration typically...
    • 10habitant
    • Thread
    • amp repair amp restoration amplifiers pioneer amps pioneer sa-8500ii vintage amps
    • Replies: 2
    • Forum: Pioneer Audio
  12. audiodogster

    Marantz SM6100SA not working

    I bought this amp in an auction for cheap and it seems to not be working. It powers on but I don't get any signal out of it although my B&K amp works with the same receiver. I'm not really too well versed in troubleshooting these sort of issues, so any ideas on what I should look for first?
  13. S

    Pioneer SX 434 No Sound

    Hi All, I hate to make a new thread about the Pioneer SX 434 as there seems to be so many, but I am stuck a moment in my repair process and I would like to be able to revitalize this unit without having to take it to a shop (and certainly without having to throw it out, particularly because I...
    • sevarre
    • Thread
    • amp repair blown fuse fuse no sound pioneer pioneer sx-434
    • Replies: 32
    • Forum: Solid State
  14. K

    Repair debarcle

    Hello, I am having issue with a particular repairer of vintage audio. I surrendered my classic 70s Amp to them for repair over 10 years ago. The first few months there was conversation on progress and then it all just stopped. Since then I have emailed tried to call to get my amp back. Now the...
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