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phono board

  1. pup.biz

    Sansui AU-7500 Phono Woes – sounds like a wool blanket over the speakers!

    [EDIT: It is a Sansui AU-7500, not -6500 ... d'oh!] Hello everyone, I'm hitting my head against the wall here with my AU-6500. Would love some help or advice. I bought the amp a few years ago and had it given a once-over (bias, recapped out-of-spec caps, cleaned) by a friend who did a good...
  2. vwong688

    SX-850 Phono A Left Channel Weak

    The Phono A on my SX-850 produces a weak left signal. It is most apparent when you switch the balance left and right. This issue isn't present on other inputs, AUX, FM, etc. I've replaced my Pioneer PL-A25 cartridge/needle and rebalanced the tone arm, didn't make a difference. I switched it's...
  3. Nuel

    Pioneer SX 1010 - Issue with Phono (Equalizer) board

    Good day. I've been working on a Pioneer SX-1010 that has issues with its Phono board. It gives out constant cracking noise, sometimes very loud, getting the amplifier into Protection Mode. This issue is only in the Phono stage. All other inputs work fine. With some investigation I found the...
    • Nuel
    • Thread
    • phono board pioneer sx1010
    • Replies: 13
    • Forum: Pioneer Audio
  4. C

    Opamp for Phono Preamp

    Hello, I'm a new member in this forum. I have an pcb from fosi audio tube phono. The sound is ok, but i wonder if i can improve the sound by replace the opamp ? The current opamp is JRC2068 and i have an unused OPA2134, can this be used here ? I don't have a schematic, but just a photo. Thank...
    • cayman711
    • Thread
    • opamp phono board
    • Replies: 11
    • Forum: DIY
  5. H

    Yamaha A1 - quality assesment of the pre amp - comments please

    I have the opportunity to purchase a Yamaha A1 integrated amp at a low price and am happy to service it myself. I intend to use only it’s pre section teamed up with a my recapped Yamaha P2200. Please could anyone comment on the quality of the A1’s pre amp? I hear that the phono section is very...
    • Hifibythekg
    • Thread
    • phono board pre amp yamaha yamaha a1
    • Replies: 5
    • Forum: Yamaha
  6. toymanmsp

    Being challenged by my 7070

    Hi all, this is my first technical post, and am in need of some help and direction. I don't have an electronics background, I'm just learning as I go along. I've run into several issues with my 7070, some of which I've worked out some I haven't. So here goes... 1. I've redone the driver board...
  7. CDinMB

    C28 intermittently loses right phono signal

    When playing records in channel 1 or 2 my C28 occasionally loses the right channel sound. I unscrew the lid and lift it and the sound returns. I lower the lid and it will play for a 3-7 minutes and go out again. I lift the lid, lower it and sound returns. Adjusting the cables does not affect...
  8. S

    Sansui 4000, Distortion in Phono Channels

    Hey everyone, I’m brand new to the vintage world, and I picked up a Sansui 4000 receiver yesterday and have come to find that there’s some pretty nasty distortion in both the phono channels. The signal seems much louder than it ought to be. Additionally, I can hear signal from Phono 1 while the...
    • Sam Kingston
    • Thread
    • distortion distortion in phono phono board sansui sansui 4000 solid state 4000 solid state receiver
    • Replies: 2
    • Forum: Exclusively Sansui
  9. QSilver

    SA-8800 Phono stage problems

    When I connect the SA-8800 up to my turntable it plays just fine, until you want to crank up the volume. If the volume gets past the 1W mark, sometimes the 10W mark, I suddenly get a massive resonant hum. I haven't checked but it sounds like it would be around the 100-200Hz area. Reducing the...
  10. AZstone

    Problems with SX 950 phono input

    Hello - I've been lurking for quite some time, and I've enjoyed reading through all of the posts specifically in the Pioneer forum. I've been waiting for my chance to get my hands on one of these beauties and I finally did. SX 950 in impeccable condition, all original parts and cosmetically...
  11. Ronito6

    Installing a new 2772 into an X1

    This posting is for the benefit of several AKers who recently acquired my F-2772 for their respective AU-X1's. I thought a single reference point would be the easiest way to answer questions and to share ideas. Instructions for installing the new 2772 board into your X1. PARTS LIST Needed to...
  12. TellMeWhy

    Marantz 2270 uneven phono sound....

    Dear All, I have a recently required 2270 that has been "almost entirely recapped" by it's previous owner, who claimed to be an electronic tech. Certainly the main power caps are indeed new, I didn't take it apart in detail to find out more.... On line and tape inputs (incl digital sources) it...
    • TellMeWhy
    • Thread
    • marantz 2270 nagaoka mp110 phono board recapping thorens td160
    • Replies: 2
    • Forum: Marantz Audio
  13. need2boat

    2220B phono issue

    2020B phono issue I was hoping to get some help diagnosing a problem when I use the phone selection. I've tried 2 different record players and I'm getting intermittent noise and slight pops of varying loudness. What I've tried so far: changed speakers Cleaned all RCA plugs and connections...
  14. need2boat

    2020B phono issue

    2020B phono issue I was hoping to get some help diagnosing a problem when I use the phone selection. I've tried 2 different record players and I'm getting intermittent noise and slight pops of varying loudness. What I've tried so far: changed speakers Cleaned all RCA plugs and connections...
  15. NazcaRecords

    Marantz 2270 P700 Phono Board Parts List

    Hello everyone, I'm trying to do an overhaul on my 2270 phono board P700. Does anybody have the part list from Mouser.com. I don't need every single component just the main basic ones. Thank you
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