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diagnose

  1. N

    PL-41 Motor Noise Diagnosis

    Recently purchased a PL-41 at auction for a great price. It needed to have it's belt and thrust plate replaced, as well as some cosmetic work, but apart from that, it seems like it hadn't been used much. I followed the instruction in the manual, and added two drops of sewing machine oil in the...
    • NightRaid
    • Thread
    • diagnose diagnosis motor pioneer pioneer pl 41 pioneer pl-41 pl-41 troubleshoot troubleshooting vintage turntable
    • Replies: 4
    • Forum: Turntables
  2. T

    Looking for help diagnosing buzz/hum/ground loop in my "HIFI" GUITAR rig!

    I have been experiencing a bad, loud, and variable noise in my electric guitar rig. Here is the details of the rig (I will include as many details as possible since ground loops are tricky): > Electric Guitar (active electric guitar with on-board buffer, 9V battery, and On-Board Effects Loop...
  3. asbesto

    Kenwood KA-305 is driving me mad! Can someone help me, please?

    Hello there, I think this is my first post. First of all, I saw a lot of posts here about this beauty and they were very helpful. I found this amp somewhere - can't even remember! It was forgot on a shelf in my lab since some years. And I decided eventually to take a look at it. Inside I...
    • asbesto
    • Thread
    • diagnose kenwood ka-305 repair
    • Replies: 9
    • Forum: Solid State
  4. A

    Luxman L-80V Problems! Help!

    Hello, A few months ago I retrieved my Luxman l-80v from storage. After connecting it up it started humming aggressively so I turned it off and let it rest for a bit. On the second attempt, the humming grew and the old 50v 10000uf Capacitors exploded. All 3 of the 0.3A 250v 6x30mm fuses were...
    • AmpSound
    • Thread
    • 10000uf diagnose help luxman luxman l-80v repair repair amplifier replacement
    • Replies: 14
    • Forum: Solid State
  5. Levi8000

    Yamaha A-6a / A-760II No power

    Hi everyone a couple of weeks ago I got a Yamaha A-6a (Japan version of the A-760II) and it has no power! I opened it up and replaced all the capacitors on the main board, the B supply voltage was only 1.4v all the voltage readings coming off of the power supply board are fine. Except the...
    • Levi8000
    • Thread
    • diagnose diy integrated amp yamaha
    • Replies: 42
    • Forum: Yamaha
  6. J

    Beginner ferrofluid question.

    Alright so I got some PSB image 4t towers used and noticed right off the bat that they sounded terrible contrary to all the fantastic reviews. I ended up tracing the issue to the tweeters. Seeing that stock replacements aren't available and if they are are far more than I want to pay I was...
  7. see_what_ha

    Yamaha A-25 / A-500 caps diagnostic

    Hello audio people. I'm a total newb in audio equipment. But the winter is long and I need to fiddle with something cool. I bought Yamaha A-25 / A-500 depending on the market amplifier at the garage sale for 15$. It is a solid state amp. Whatever that means))) there are no lamps. Looking for...
    • see_what_ha
    • Thread
    • capasitor diagnose fix-it source selector yamaha yamaha a-25 yamaha a-500
    • Replies: 9
    • Forum: DIY
  8. Ronito6

    Mr. Carlson works on a Sansui Sansui B-77

    Yeah....it's just a B-77 but there is good stuff here I think. (For a low level EE hobbiest like me at least.) He lavishes praise on Sansui engineers at the 9:33 mark. (And at a couple other points further along the way.)
    • Ronito6
    • Thread
    • b-77 diagnose diagnosis repair sansui restoration test eqipment
    • Replies: 3
    • Forum: Exclusively Sansui
  9. M

    Sansui AU717 protection issue

    first time poster: I’ve got a AU717 on the bench with a problem I haven’t been able to nail down. It turns on, protector light flashes, protection relay clicks, left channel comes on but no right, after 5-10 minutes right channel snaps on and everything works normally. I have set the bias...
  10. Senor Visa

    Sony PS-LX3: Repair (DIY?), Replace, or Move On?

    Hey, I've been in love with my Sony PS-LX3 for ten years. I had fond memories of the Technics (SL-10) that I grew-up with, which had a Repeat, and a Return function (and auto-cueing), and I basically just searched Craiglist for a turntable with those functions [side note: I have since bought...
    • Senor Visa
    • Thread
    • diagnose diy repair sony sony ps-lx3 used
    • Replies: 0
    • Forum: Turntables
  11. Johnny_Law

    Odd Problem H/K 330B: Left Channel VERY Weak SOLVED

    Eventual solution: Bad solder job on one replacement transistor! Problem: Weak (barely audible) left channel. Constant regardless of input source Also weak channel through headphones Work already completed: Rebuild of Control Amp and Main Amp circuit boards De-oxit of all pots and switches...
    • Johnny_Law
    • Thread
    • 330b channel diagnose harman kardon rebuild
    • Replies: 40
    • Forum: Solid State
  12. vaathi

    Eico HF-81 is blowing Fuse

    Hi all.. I picked up Eico HF-81 which has work done by NosValves decade back.. I did post about that earlier in one of the thread. I powered it up in variac at 40 volts and every 20 minutes stepped it up. I did not see the pilot light on even when i turned it on at 40. I slowly brought it...
    • vaathi
    • Thread
    • diagnose eico eico hf81 fuse tube amplifier eico acrosound
    • Replies: 20
    • Forum: Eico Place
  13. RLJohn

    RLJohns Sansui G-5700 Rebuild & Repair

    Here are a few Pictures of it not working right and what I see that has been done before.
    • RLJohn
    • Thread
    • diagnose f-2980 f2980 help rebuild reciever repair sansui sansui g-5700 sansui g5700
    • Replies: 24
    • Forum: Exclusively Sansui
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