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troubleshooting

  1. K

    Need help troubleshooting SONY CD changer

    I need some assistance troubleshooting a Denon CD changer DCM-444 (not SONY, my mistake). It's a changer which uses standard 6-disk cartridges. I am waiting for a service manual and schematic to arrive. The problem is that when a cartridge is inserted and it tries to inventory the six CD trays...
  2. M

    AKAI 1015 Receiver loud crack(le/pop) on power on

    Ls, My mom's Receiver makes a loud bang when turning power knob from off to speakers A. It scares her so much (she's 88) that she doesn't turn it on anymore which saddens me deeply. Type: AKAI 1050 Receiver I've got an old scope and multimeter trying to teach myself electronics and at the...
    • MacShrike
    • Thread
    • akai 1015 receiver repair troubleshooting
    • Replies: 47
    • Forum: Solid State
  3. E

    Is my vintage Shure cartridge toast?

    Hello, pretty new to turntables and home audio in general. I’m an electrician by trade and a tinkerer by nature, so I’m familiar with tech troubleshooting and have some experience with electronics. I’m still learning to dial in my turntable actually (got me one of them fancy mirror...
    • eh eh ron
    • Thread
    • cartridge shure cartridge troubleshooting v15 type iv
    • Replies: 11
    • Forum: Turntables
  4. Doug Robert

    Grundig KS 732 U Console, no sound

    Hi all, i recently picked up a Grundig KS 732U solid state console with Turntable at the thrift store, it was powered up by another guy so i did some poking around and discovered no sound at all, light in the cab would come on but TT wouldn't power and couldn't even get static from the radio...
    • Doug Robert
    • Thread
    • cabinet console grundig radio repair service solid state stereo troubleshooting turntable
    • Replies: 4
    • Forum: Solid State
  5. JayGee3

    Troubleshooting a DAT D-07

    Hi all. Looking for a bit of help or advice. I run vintage Pioneer gear and recently came into possession of an amazing DAT collection of live performaces and rehersal sessions. So I picked up Pioneer D-07 DAT deck. It was built for the Japan market so I'm using a step down transformer. I...
  6. M

    TEAC A6010 Troubleshooting

    Hello AK, Recently acquired the TEAC A6010 and have a few issues with the physical reel it seems. I posted a short video of the issue and if you turn the audio up you can hear a "grind" or "tick" where it seems the tape is trying to twist or it gets caught on something. I have attempted to...
    • MPB
    • Thread
    • help reel to reel tapehead teac teac a6010 troubleshooting
    • Replies: 3
    • Forum: Tape
  7. Anonky

    Pioneer QX-949 left channel noise

    Hi all, I have a qx-949 that plays music on both channels on all inputs; however, the left channel has persistent static noise. This occurs on all inputs. For what it may be worth, dc offset in right channel is rock solid at 2.5mV. Left channel was like 60mV. Considering this problem and...
    • Anonky
    • Thread
    • pioneer qx949 repair troubleshooting
    • Replies: 5
    • Forum: Pioneer Audio
  8. Mikhail

    Denon AVP-8000 no output from RCA to power amp

    Hi all, I recently picked up an AVP-8000 preamp from Denon and am flummoxed as to why the RCA outputs to the amplifier are not working. None of the outputs work except headphone which sounds amazing. No distortion, both channels work great. Yes it was a great deal and I figured since there...
    • Mikhail
    • Thread
    • avp-8000 denon preamp troubleshooting
    • Replies: 9
    • Forum: Solid State
  9. Mike1767

    Cr-2020 Troubleshooting

    I have recently brought home a 2020 from my parent's basement that I am hoping to bring back to life. Growing up, it was my Dad's pride and joy, but it has now been sitting unused for too long. I am half decent with a soldering iron and multimeter and can read a circuit diagram, but I can't...
    • Mike1767
    • Thread
    • cr-2020 protection circuit issues relay solved troubleshooting yamaha
    • Replies: 18
    • Forum: Yamaha
  10. ajmich

    NAD 2140 drops right channel under moderate load

    Moderately loud volume, fed from an Audioquest Dragonfly Red off my iMac Pro... my old NAD 2140 amp cuts out on the right channel after a couple minutes. Happens with or without the soft clipping engaged. Output is very good, clean, not overly loud. Via ELAC Debut 6.0 DB62 speakers, rated 6...
    • ajmich
    • Thread
    • amplifier nad troubleshooting vintage
    • Replies: 12
    • Forum: Solid State
  11. T

    Troubleshooting popping noise through speakers

    Hi all, So i keep hearing this popping sound coming from my speakers when watching tv. It happens A TON when airplaying to my sony tv from my macbook. It happens frequently but less when watching apps on my sony tv and I think it even happens when listening to my bluesound node (but much MUCH...
    • Tdaut
    • Thread
    • chromecast netflix popping noise popping sound schiit sony tv static noise troubleshooting
    • Replies: 7
    • Forum: Home Theater & Video
  12. DatGtrPlaR

    Troubleshooting the Sansui AU-555A

    I started a thread earlier on restoring the 555A, https://audiokarma.org/forums/index.php?threads/my-first-restore-attempt-sansui-au-555a.977082/ which was turning into a troubleshooting thing. So, from the advice of others here, I’m doing this particular troubleshooting here. The affected...
  13. ADClosson

    ST-70 low bias after blown fuse

    I recently noticed a hum in the left channel of my completely refurbished ST-70. I read a thread suggesting to swap the pairs of EL34s to see if the hum moved channels. I did this without re-biasing (perhaps foolishly?) and upon powering up the fuse blew. When I replaced the fuse, I could not...
  14. I

    Faint white noise comes from speakers with amplifier off

    Wondering if anyone else has run into this and knows why/how sound could be coming from the speakers with the amplifier and preamplifier off. Gear is: Emotiva BasX PT-100 preamp Hafler 9505 amp Klipsch RP-600M speakers
  15. ikonw8

    Pioneer SX-828 Power Supply Heat Question

    Thank you all! I am restoring a Pioneer SX-828. While it's not my first time restoring a receiver, it is my first Pioneer. At this point, all the boards have been re-capped, new semi-conductors on the Main, AF, Head, Protect and Power Supply. The unit operates normally, protect relay...
    • ikonw8
    • Thread
    • heat pioneer pioneer sx-828 power supply troubleshooting
    • Replies: 5
    • Forum: Solid State
  16. F

    Rotel RD-870 not playing tape?

    It doesn't play, the buttons and lights are a bit finicky, yet there is nothing visibly wrong internally as far as I can tell. Fast forward and reverse sometimes work, but most of the time they doesn't. What's going on? Has anyone had any experience with this? Rotel RD-870 issues - YouTube by...
    • faketuxedo
    • Thread
    • audiophile cassette rotel rotel rd-870 tape troubleshooting
    • Replies: 1
    • Forum: Tape
  17. N

    Grace F9 with Bliss Stylus

    Hello, I am still pretty new to turntable ownership. I have finally beaten the hum on my Phillips 212 and I am on to dialing things in. I have fitted my Grace F9 with an aftermarket Bliss 703 stylus, which is conical, but fits. I had high sibilance when tracking at 1g, at 2g sibilance is much...
    • Nafin
    • Thread
    • cart alignment grace f-9 repair phillips 212 troubleshooting
    • Replies: 6
    • Forum: Turntables
  18. PoPSiCLe

    Pioneer PL 117d problems

    So. I have a newly found PL 117D, that someone left at a recycling center - it looks pristine, other than a problem with the lid, but other than that, as I said, pristine. Unfortunately, it does not work, and I'm kinda at a miss what is the real problem. I'm fairly technically inclined, but I...
    • PoPSiCLe
    • Thread
    • pioneer pl 117d troubleshooting
    • Replies: 23
    • Forum: Turntables
  19. J

    Nakamichi MR-1 Motor Doesn't Spin...

    I recently acquired a Nakamichi MR-1 that needed a new belt. Once I replaced the belt, the motor stopped turning entirely. I noticed when I first got it before installation of the belt, the motor was indeed functional. I can spin everything with my finger, so I don't think the belt is too tight...
    • Justin Hogan
    • Thread
    • help nakamiachi trouble troubleshooting
    • Replies: 2
    • Forum: Tape
  20. T

    Help Troubleshooting TC-520

    Hey there! First time posting here, I was hoping someone could give me advice on troubleshooting an issue with my Yamaha TC-520. Here's a link to the video of what's going on: https://imgur.com/a/owkPYpv So basically, no sound, just a fluttering popping sound. Just got this, cleaned the...
    • Travis Kaupp
    • Thread
    • cassettes tc520 troubleshooting yamaha
    • Replies: 5
    • Forum: Tape
  21. B

    Onkyo TX-2500, weird feedback noises

    I have an Onkyo Tx-2500 (mk1 version). Last summer it started making a bunch of loud crackling noises (like the sound you'd get if you dragged your fingernails across a live microphone) accompanied by a deep bass noise (sort of a pulsing womp womp womp womp... sound). This happens even when the...
    • bambino
    • Thread
    • feedback onkyo onkyo tx-2500 receiver troubleshooting
    • Replies: 1
    • Forum: Solid State
  22. M

    Help with my "new" Sherwood S-7100

    Long time lurker here and first poster... so nice to meet y'all. I just picked up a Sherwood S-7100 in beautiful condition from craigslist in my area. It's honestly a beautiful receiver listing right now with headphones and it sounds stellar. And no power issues with the volume knob! *crosses...
    • Mikey$5
    • Thread
    • question s-7100 sherwood troubleshooting
    • Replies: 3
    • Forum: Solid State
  23. E

    Sherwood s-7200 weak Right Channel FM/AM/Phono

    Hey Everyone, I picked up a Sherwood S-7200 for a nice $20. The AUX 1 and AUX 2 work just fine with output of both speaker channels and all AFTER replacing a speaker fuse. However, the Right channel is extremely weak and humming on FM / AM / Phono inputs. Loving the sound of this on the AUX...
    • Eyebolt
    • Thread
    • 7200 channel right sherwood troubleshooting
    • Replies: 0
    • Forum: Solid State
  24. Beavs

    Yamaha CR-2040 Shorted During DC/Bias/Voltage Adjustment

    Well, I'm pretty new to this and probably have no business digging into the likes of a CR-2040, but this is what I've found to pass the time and I'm enjoying every second of it. I picked this CR-2040 up for $200 knowing it was cosmetically great aside from being dirty and there was no sound out...
    • Beavs
    • Thread
    • capacitor electrolytic output transistor recap restoration transistor troubleshooting yamaha cr-2040 zener diode
    • Replies: 143
    • Forum: Yamaha
  25. potoooooooo

    500B No Power

    So i picked up this 100% original 500B, and it was working. I performed a brief basic function test before I reworked it with the metalbone kit. Now it no longer has power. The rear AC outlets work, so the power switch and fuse are fine, but the rest of it I'm not so sure about. I quadruple...
    • potoooooooo
    • Thread
    • 500b fisher troubleshooting
    • Replies: 18
    • Forum: Fisher
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