amplifier repair

  1. Ray122

    Help with Marantz 2325 Amp Rebuild

    Hey everyone. Been grappling with the amplifier section of amplifier section of Marantz Model 2325. When I received it, the left channel amplifier was keeping the unit in protection mode. When I disconnected that section and just ran it with the right channel amp, the unit comes out of...
  2. Ray122

    Help with Marantz 2325 Amp Rebuild

    Hey everyone. Been grappling with the amplifier section of amplifier section of Marantz Model 2325. When I received it, the left channel amplifier was keeping the unit in protection mode. When I disconnected that section and just ran it with the right channel amp, the unit comes out of...
  3. tlite

    Is this what a bad transformer looks like? (QSC CX12 amplifier content)

    Hi All, This was a free find - a QSC CX12 2 channel amp I got from an old theater. I took the hood off and saw this- never seen a bad transformer before, but guessing I'm looking at one now...? If I'm right... send to the junk heap? (FYI, I think I can probably get another one of these...
  4. Ray122

    Yamaha CR-1020

    Hey everyone! Hope you're all enjoying the holidays! I once again found myself in a repair pickle and asking for the sage wisdom of members much more experienced than myself. Recently re-capped a Yamaha CR-1020 for a friend and first I ran into the issue with the misprinted polarity sign on...
  5. T

    Help repairing Akai AM-M939

    Hi there, Recently picked up a nice matching akai system from a garage sale, the amp being the AM-M939 Unfortunately upon firing it up the right channel appeared to be barely working, crackling some music at times. I took the cover off and did some diagnostic, no outstanding dry joints, all...
  6. N

    NAD 7130, with low cirka 200 hz noice in all channels. Newbie thinks of a rebuild with cherrypicking

    Sorry about my English, Im totally fluent speaking and reading it, but Im not that used to writing in English. Im Swedish by the way. Living in Norway. Okey. So I got this NAD 7130 for free when I bought a NAD6100 cassette <3 and a NAD5320 CD for 500 NOK (about 60$) For you it may sound...
  7. phatterplatter

    Pioneer SX-770....no output balance

    Hi... I'm restoring one for the original owner. One side flamed out the emitter resistors so, I replaced all the output finals, all the emitter resistors, drivers and , electrolytics. The service manual and/or schematic mentions ZERO info on setting the four pots on the power amp. They look...
  8. Mørbeck

    Luxman LV-113 left channel problem

    Hey guys A Luxman LV-113 amplifier has a problem with the left channel, both A/B speaker output. We troubleshooted speakers and cables, all work on the right side of A and B but not on the left. Interestingly, there is stereo sound coming out of the headphone port. Furthermore, when the amp is...
  9. audio friend

    Recommendations for amp repair?

    Hello folks, I use an old integrated amp (Marantz 1060). While it still sounds pretty good to me, I think it might be time to get the capacitors replaced. I often hear dust or scratchiness when I turn the volume knob; and there's a sustained hum that I hear when there's no music. I'm not handy...
  10. J

    Denon receiver powers off and on randomly

    I have a Denon DRA-325R receiver (from the late 80s or early 90s) which I have used off and on for many years, and which is currently hooked up to our Blu-ray player for better sound during movies and shows. It still works fine, except that it will sometimes "reset" itself, powering off and then...
  11. jblmar

    Wanted Marantz 2270 Amplifier Board. Part Number YD2819009-0

    Greetings, Anyone know where I can source the complete amplifier board from the Marantz 2270? Thank you.
  12. sanjib

    KA-7300 relay driver transistor

    Hi I recently acquired a Kenwood KA-7300 integrated amplifer. Initilly it has some static but I cleaned the switch and pots to eliminate that. Initially for 2.5 weeks the relay was working fine and clicking within 1-2 secs.. First time yesterday when I turned it on it took about 4-5 mins or so...
  13. goldswimmerb

    Sony Amplifier wont output audio

    Hello, I was wondering if any of you guys could help me. I have a sony STR-AV970x that will not output any sound. It will show the input on the on-screen EQ however the audio never seems to leave the system. Im willing to do pretty much whatever it takes to get this thing working again, and Im...
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