repair

  1. Roman68

    The motor of the Philips AG 2230 turntable does not start. Help me please

    I ask for advice, dear inhabitants of the forum. I bought this turntable today, it looks great, but the motor won’t start. The power cord is not broken, voltage is supplied to the motor terminals. The lower bearing is lubricated, but the motor does not work.
  2. MartyGee666

    Marantz 2250 bias fluctuation

    Hey! I'm getting a wondering bias voltage across pins J708 & J710 (bias voltage). Its causing some annoying static and I'm not sure where I should look first. The unit has been re-capped and sounds great for the first hour, but eventually the bias fluctuates on the left channel and it throws the...
  3. R

    SAE MARK XXXIB distorted channel, then loud buzzing.

    Hey what's going on? so when I play music through the amp the left channel is distorted the right channel is clear. when I moved the amp, both channels went completely distorted and I had to unplug it, loud buzzing through the speakers and buzzing around the bad darlington area. I pulled the...
  4. M

    Technics RS-TR311 Tape Deck not functioning properly

    This is my first time posting to the forums ever! I am kind of newer to this stuff, came into possession of a couple components and speakers a bit ago and just bought more stuff today. I bought a Technics tape deck today, it plays tapes really well but it doesn't properly rewind or fast...
  5. analogwisdom

    Yamaha newbie A-700 resto thread

    Hey all. I'm usually a Kenwood addict, but I am pretty new to the repair/resto hobby (this will be the 2nd amplifier I've worked on...) and have been looking for a new project to tinker around with. With the graciousness of @eiraved, earlier this week I received an A-700 in need of some love...
  6. toads

    Pioneer VSX-501 Repair Recap Advice

    Hello. I posted this in two incorrect spots first so hopefully I found the right board lol I own a Pioneer VSX-501 that was given to me by my uncle years ago. I use it in my living room for television audio and as a general purpose multimedia player and it's worked...
  7. A

    Nikko QSR-4040 Distortion Questions

    Hello AK users, I'm still working through my Nikko QSR-4040 quadraphonic receiver. I have gone through it; replaced caps, bulbs, cleaned controls twice, etc. However, when I got the unit it had bad bass distortion on both front channels, the rear mimics front in 2CH. I'll do more thorough...
  8. Mat86

    Replacing a headphone jack? (C-4)

    So long story short, last summer I tripped over a headphone cable, destroying both the headphone plug, cable, and the amp's jack. I was able to repair everything involved in the crash, using some krazy glue and baking soda to get the plastic housing back together. As you can see in the pics, the...
  9. W

    Attempting to fix my dads RFT k13ProfiL

    Trying to fix this speaker. Both drivers are working (tested them by holding the audio cable from my receiver directly to the contacts on the drivers) so i think there is a short on the pcb board. I know very little about electronics so it's hard for me to follow the path of current. I tried...
  10. W

    Attempting to fix my dads RFT k13ProfiL

    Trying to fix this speaker. Both drivers are working (tested them by holding the audio cable from my receiver directly to the contacts on the drivers) so i think there is a short on the pcb board. I know very little about electronics so it's hard for me to follow the path of current. I tried...
  11. IgniFerroque

    SL-1700 mk2 shipping damage :(

    Good News: I got a free Technics SL-1700 mk2 Bad News: because the ebay seller shipped it loose in a box without a scrap of packaging and without the tonearm secured Good News: The platter didn't come loose and still spins quietly at the right speed. Bad News: The tonearm makes a creaking noise...
  12. F

    Need Audio Repair Nashville Tennessee

    Anyone know of any audio repair technicians near Nashville? I used Hi-Tech Service a few times but they closed a couple years ago. I have an SX-1250 that I'd like to get restored. Thanks, Chad
  13. razpones

    Boston G2 subwoofer

    Hi everyone While I was walking my dogs I came across a Boston G2 subwoofer speaker for car audio at the park. Someone most have taken it off from their car and dumped it. So I took it home not just to keep the parks clean (I find all kinds of stuff when I walk my dogs, it is amazing, some at...
  14. Szalbierz

    Sansui 9900Z Repair

    Welcome guys, i am reparing my Sansui 9900Z. I bought this Reciever some years ago on Ebay. On Power Amp. Board all drivers (Q7-Q11) and power transistors (Q1-Q4) were burned. Q12 and Q13 were fine, just like "kQFT1" (JFET x2). I decided to change all of them here is the list: Q1 2SC3858 Q2...
  15. T

    Driver thudding at medium volume

    Speakers: definitive technology bp-20 with bp-30 woofers. 6ohm impedance 500w max. Amp: adcom gfa 5500 200w/ch @8ohms Hey all, I ran into an issue today after sitting down to have a listening session. About halfway through a song that's pretty heavy on the bass, two of the mid-range drivers on...
  16. analogwisdom

    From never touching a soldering iron to a repair attempt in 7 days— success! (Kenwood KA-7300)

    Just wanted to share my success story and pat myself on the back a little. (WARNING: BAD SOLDERING AHEAD :rflmao: ) About 2 weeks ago, I took a closer interest in how my equipment works, so I bought a digital multimeter and started studying various threads about schematics, how electrical...
  17. M

    Help with DBX 3BX

    Hello, I am trying to repair a DBX 3BX Series I (revision 2, the one without the daughter boards). Some things I managed to fix but I still have a problem with the MF circuit. As soon as I raise the expansion, no matter the transition level, the output goes up as you can see in this video...
  18. Alonia

    NAD Model 300 repair

    After a long time where I was no longer active here I would like to throw an interesting project into the room and maybe someone can help me. Normally I mainly deal with Yamaha devices but for once a NAD Model 300 has found its way onto my desk.;):biggrin: There was a note on the lid...
  19. L

    Repair help: Yamaha AX-540 amp

    Love my old AX but the left channel sounds slightly "dull" compared to right channel. At first I thought it was just a volume difference, but it also lacks some brilliance compared to the other channel. Sitting at ideal listening position, the right channel sounds brighter and louder. I have...
  20. Wordman

    Repair near Knoxville, TN

    Hello! Been a member for a long while, but haven't been on in a very long time. I have the full Heathkit Professional set w/AA-1800 amplifier and a DUAL turntable. Does anyone know of a place somewhere within a few hours drive of Knoxville, TN (or The Villages, FL) where I can take the various...
  21. V

    Pioneer SX 727

    Hi, I bought a Pioneer SX 727. I noticed two things. One, the bass knob doesn’t go full power, it goes only 3/4s of the way. In addition, whenever i turn from fm to phono or other, there is quite a loud static noise.
  22. angelaudio

    Help with Heat Damage on PCB of Mitsubishi DA-A30

    I opened up my Mitsubishi DA-A30 to set the idle current and center potential adjustment and immediately noticed some heat stress marks on one of the PCB boards (CTL-56). It appears that the heat stress is right underneath two 820ohm 2W resistors R313 & R314 No other part of any other board...
  23. I

    Resources request on how to repair vintage audio devices

    Hello! I want to learn to repair reel-to-reel, pick-up and amplituners. I have a minimal knowlegde about electronics. I tried to search on the web for useful materials but I am only able to find some general electronics documentation. If anyone knows some books, courses, tutorials, please...
  24. Freestone

    Pioneer SA-6700 Power on, No Sound

    Hi all, I am new to audio equipment, audio karma, and vintage electronics. I purchased my late model SA-6700 in its current condition for $90 because I love the look of it and have experienced the high quality sound from a similar Amp in the past. I have been wanting to get a nice setup for a...
  25. M

    Advice on repairing my Infinity speakers

    Hi! I have a pair of infinity RS5000 that need some love. The boxes are broken, foam is long gone, woofers are dirty and some of the plastic is broken. I also assume that the capacitors are not in the best shape. I asked about them here few months ago and was told I need to do a lot of work...
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