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servo

  1. P

    Velodyne ULD-15 Subwoofer - Thumping/Refoam/Shim

    Hi All - I'm new to the group and just got (for free) a Velodyne ULD-15 Subwoofer Series II that has no foam. It was posted (from the daughter of the original owner) a properly working when put into storage 4 years ago and other than the foam looks in mint condition (beautiful cabinet and amp...
    • Pete.Schmidt
    • Thread
    • problem refoam repair series ii servo shim thumping velodyne uld-15 subwoofer
    • Replies: 10
    • Forum: Speakers
  2. M50'sMike

    Velodyne HGS-18 Servo help

    Hey guys, have been on a long road trying to get my HGS-18 to work properly. Got it used 4-5 years ago, got a new driver and servo which helped, but long story short. I want to make sure the driver is hooked up to the servo properly there's a lot of pins on that side and the sub still cannot...
    • M50'sMike
    • Thread
    • hgs 18 servo subwoofer velodyne
    • Replies: 8
    • Forum: Speakers
  3. M50'sMike

    Velodyne HGS-18 Servo Hookup?

    Hey guys, have been on a long road trying to get my HGS-18 to work properly. Got it used 4-5 years ago, got a new driver and servo which helped, but long story short. I want to make sure the driver is hooked up to the servo properly there's a lot of pins on that side and the sub still cannot...
  4. T

    Yamaha p520 direct drive turntable not spinning.

    I am working on a yamaha p520 and it doesn't spin at all. Any clue what it could be ? I tried to measure the output of power transformer but I couldn't get any voltage reading. One other thing I noticed is that the strobe light doesn't turn off if the arm is in the off position but it does start...
  5. T

    Denon dp-40f service manual help needed.

    So I just did a full recap om this denon turntable I had laying around but I have no clue what how I am supposed to re calibrate it. I am trying to figure out what the service manual wants me to measure but the point I think it is talking about doesn't react to adjusting the potentiometer at...
  6. T

    Direct drive servo recordplayer issues.

    For reference the record player is a yamaha yp d4 I have this record player that works but has a few issues. The two main ones being that it spins at the correct speeds but it slowly speeds up over time. And also that unless I turn the internal potentio meter all the way up for 33 rpm it just...
    • TrevorBarten
    • Thread
    • direct drive recordplayer repair servo yamaha
    • Replies: 14
    • Forum: Turntables
  7. M50'sMike

    Velodyne HGS 18 Repair

    Hello everyone, I have a rather specific inquiry regarding the Velodyne HGS 18. I bought the subwoofer a few months ago, but there are certain frequencies that make the sub bottom out, (even with gain at less than one) which should essentially not be happening. Because there are lower...
    • M50'sMike
    • Thread
    • repair replacement servo servo control sub woofer subwoofer subwoofer amp subwoofer repair velodyne
    • Replies: 0
    • Forum: Home Theater & Video
  8. Are Gjerde

    Genesis servo 12 to Infinity Renaissance 90

    Hi I am the proud owner of a pair Infinity Renaissance 90 which i love. But I used to pen IRS Epsilon. I regret the downgrade especially due to the difference in bass. To compliment my rens, I’ve just bought a subwoofer called Genesis servo 12 and I’m waiting for it to arrive in the post. I’ve...
  9. VonDrake

    Velodyne ULD subwoofer Servo Cable Question

    I am currently using a vintage Velodyne ULD-15 subwoofer from 1986 in my home theater setup. More or less happy with it, although I suspect the 5-pin servo cable has a short in it somewhere. The cable works well, but If it's moved, it sometimes causes the driver to pop, or worse - so I don't...
    • VonDrake
    • Thread
    • servo subwoofer velodyne xlr
    • Replies: 34
    • Forum: Speakers
  10. M50'sMike

    Dayton ultimax Driver Swap for Velodyne hgs18 advice

    Hello fellow AKer's! I have a Velodyne Hgs 18 that has some unique behavior. It seems to bottom out at specific low frequencies, even at low volume. But can handle much lower notes even at much higher volume. Me and AudioFreak71 seem to think it may possibly be the servo. Regardless, there's an...
    • M50'sMike
    • Thread
    • diy repair servo servo bypass subwoofer velodyne
    • Replies: 0
    • Forum: DIY
  11. duncan

    Denon POA 2200 repair/recap - some notes

    Nothing earth-shaking here but thought I'd post some pictures and notes for anyone who runs into a similar situation. I acquired a POA2200 power amp last year. The previous owner gave full disclosure that it seemed to have intermittent problems, but I couldn't make it misbehave. Actually the...
    • duncan
    • Thread
    • bias denon protection recap relay servo zener diode
    • Replies: 19
    • Forum: DIY
  12. david winter

    Teac A-3440 with capstan servo fault (found where but not why)

    Hi, I'm stuck trying to find out why the capstan motor on a Teac A-3440 doesn't spin when the safety lever is pulled (as if a tape was loaded). I restored the power supply board (recaped, all silicon diodes replaced). All fuses are good. Capstan motor has 30V going to it. A quick test by...
    • david winter
    • Thread
    • a-3440 a3440 capstan deck motor recorder servo tape teac
    • Replies: 9
    • Forum: Tape
  13. sean sweeney

    Sony TC-k4A Servo Motor Fix...

    We sell a lot of vintage cassette decks here and I'm in charge of restoring them and keeping them on the shelves and not in the back room. I've done many since I started here and for some reason there's been a craze amongst old timers and hipsters all coming in for some classic analog decks...
    • sean sweeney
    • Thread
    • cassette fix issues motor problem servo sony spinning stopped tc-k4a
    • Replies: 0
    • Forum: Tape
  14. BilboBaggins

    Philips ga-202, motor stopped turning.

    im looking for some help troubleshooting this little gem. It started with an intermittent problem that went away whenever I tried to test it out. Now it is solid. Lights up, but no motor movement in any of the 3 speed settings. I homed the motor, and as far as I can tell, the windings seem to...
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