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repair

  1. Observatory1

    Stephens FR150 Reconing needed or kit for Stephens 15" FR 150 16 ohms Can anyone help?

    We recently built a new system, and we had a pair of Stephenes FR 150 16 ohms speakers that we used and loved them, but recently we noticed that one of the speakers started to have a little distortion. Does anyone know of someone who repairs them? We are in the Los Angeles area. Thanks Observatory1
  2. A

    NAD 326BEE amp problem

    Hello, I have a 326BEE with a problem that's proving pretty difficult to pin down. The first thing I noticed a little pop from the unit and the left channel went out. The only damaged component I could find was R250, which looked like it had blown, but was maybe just scortched and was still...
  3. P

    Philips GA-247 idler wheel arm misaligned – speeds incorrect

    Hello everyone, I recently bought a Philips GA-247 turntable and I’m having an issue with the idler wheel arm alignment. When I select the speeds, the idler wheel does not touch the correct part of the motor pulley: At 16 RPM, instead of touching the thinnest step of the pulley, the idler wheel...
    • PabloGa247
    • Thread
    • phillips repair speed change problem turntable turntable adjustment
    • Replies: 3
    • Forum: Turntables
  4. M

    Yamaha RX-V683

    Hello My Yamaha RX_V683 has the protection circuitry activated. To search the failure I need a service-manual with the entire schemnatics. Doe's somebody knows where I can find it? Kindly Martin
  5. G

    Technics Direct Drive troublehooting - shaky stability/faint knocking sound(audio clip)

    Hi everyone! Long time lurker, looking for help from anyone who has repaired Technics DDs and might have come across these symptoms: I have a Technics SL-01 , its an early rare 70s Japan-market DD quartz lock table , a bit similar to the SL-1500 MkII and SP-20 internally I'm told. I got one...
  6. R

    Trying to repair Pioneer SA-1490

    Hello all, I’m exploring a possible repair on a Pioneer SA-1490 receiver I got from a friend who insists it was working for him before giving to me. I’d like to save it from the recycle pile but it’s not working now. Two sentences about me. Although trained as a EE, I’ve leaned on more of the...
    • Rocky_714
    • Thread
    • capacitor diagnosis pioneer receiver repair transformer troubleshoot
    • Replies: 13
    • Forum: Pioneer Audio
  7. D

    Repair help on my F-2624 on my Sansui 9090DB

    I'm currently having an issue on my 9090DB where the protection light does not come on and it does not click. From digging around forums, I believe that the F-2624 board is the problem. Attached are the resistor values that I obtained, photos of the board, and a fusible resistors that looks and...
    • degdug
    • Thread
    • #f2624 9090db protection r-2624 f-2624 rebuild kits relay not clicking repair resistor question
    • Replies: 13
    • Forum: Exclusively Sansui
  8. wmac

    Luxman L-560

    Hi, I am restoring a Luxman L560, and I need to find a power switch. Please get in touch with me if you know where to find it. Also, I need to find a service manual
  9. DG_lite

    Where to start on my Lafayette LR-221

    Hi all, as the title says, I have a couple small but annoying problems with this rare quadraphonic receiver. I think I know what the issues are but this is my first time trying to track down and rectify such problems. I'd like some guidance on where to look for my problems and what to replace...
    • DG_lite
    • Thread
    • buzzing hum hum issue lafayette lafayette recievers repair repair advice repair advice help needed
    • Replies: 27
    • Forum: General Audio Discussion
  10. Schmurpy

    Manual for Project One Mark 1500, or Telefunken TR-1500 DC.

    Hello, does anyone have the manual for either the Project One Mark 1500, or Telefunken TR-1500 DC?
    • Schmurpy
    • Thread
    • bias documentation information offset pacific stereo rare receiver repair restore service
    • Replies: 0
    • Forum: General Audio Discussion
  11. K

    Klipsch Chorus ii binding post replacement

    Hi guys, I recently acquired a pair of Klipsch Chorus ii speakers, but one of the speaker has both of the speaker connecting post broken. Klipsch didn't have a replacement part, given these are older speakers. Does anyone have any replacement part suggestions? I saw some parts on ebay, amazon...
    • kb0311
    • Thread
    • chorus chorus ii repair
    • Replies: 6
    • Forum: Speakers
  12. bonesbiggis

    Classe audio ca-150 power amp swap output transistors to MJL21194G from 2SC4029 good or bad ide ?

    I have found some burned 2SC4029 and 2SA1553 output transistors. I also found some new MJL transistors laying around. Is it god idea to swap to MJL21194G and MJL21193G ?? What different dose it make to the sound and funktion off the amp ? In the manual is it MJL transistors. Why is the amp...
    • bonesbiggis
    • Thread
    • modifications of classe ca-150 output transistors rebuild repair service
    • Replies: 2
    • Forum: Solid State
  13. C

    Vintage Pioneer DT-500 Display Glitches - Seeking Repair Advice

    Hi everyone, I'm working on a vintage Pioneer DT-500 Audio Digital Timer and hitting some perplexing display issues. I believe it's an NE model (220V 50Hz, no external voltage/frequency switches). This unit was not used and not connected to electricity for over 20 years before I recently...
    • coiso231
    • Thread
    • digital timer display error dt-550 pioneer repair vintage 70's pioneer
    • Replies: 1
    • Forum: Pioneer Audio
  14. W

    Help Needed: Repairing Sony CDP-970 CD Player

    Hello All, I have recently picked up a seemingly very nice 1988 Sony CDP-970 CD Player, and appear to have hit a snag attempting to repair it. The issue is that when I insert a disc, the mechanism that lifts the motor up to spin the disk does not come up all the way. Taking off the top clamp...
    • WorldMusic
    • Thread
    • cd player repair sony cdp-970
    • Replies: 4
    • Forum: DIY
  15. N

    Requesting guidance on Systemdek IIX restoration

    I recently was able to buy a Sytemdek IIX that appears to be an early model (steel bottom, teardrop armboard). When the power switch was clicked on nothing would happen. I researched a bit and thought it would be the capacitor but ultimately turned out to be the switch that was faulty. I've...
    • Nestorpants
    • Thread
    • capacitor fuse repair resistor systemdek iix
    • Replies: 5
    • Forum: Turntables
  16. J

    High end amplifier repair and service engineer required. UK.

    Hi All, I am in need of a well regarded and trusted service engineer for some older high end amps. Based in the UK. Specifically; Mark Levinson 33h, 334 & 27.5 ECS EA-2 Currently the ECS is the only amplifier which actually needs repair - dropping out on one channel. God help me when the...
    • Josh b
    • Thread
    • repair repair advice repair advice help needed service
    • Replies: 1
    • Forum: Solid State
  17. ThisIsValid

    Yamaha KX-W900 rescued from the trash - a heads up

    I recently rescued a Yamaha KX-W900 dual cassette deck from being sent to the big landfill in the sky. What a lovely machine. The reason it was about to be destroyed was that deck "A" would not play and had a stuck tape inside it. Removing the front panel and looking at the mechanism from below...
  18. B

    Headshell repaired with glue - Effect on sound quality?

    I got a Dual 1229 which came with the headshell (not the sled) broken where it meets the tonearm. I was succesfully able to reattach it to the tonearm with super glue, and it seems to have held up. Anyways, I was wondering what effect this has on sound quality, as I never had the chance to hear...
  19. P

    Dual 601 belt getting stuck at 45 rpm

    Hi, this is my first post to this forum and I know very little about record players. I purchased a dual 601 refurbished a year ago, and the speed selector has always acted up, specifically switching it from 45 to 33. When I switch the speed back from 45 to 33 the belt gets stuck in the middle...
    • pizza2006
    • Thread
    • 45 rpm dual dual 601 dual601 help record player repair repair advice help needed turntable turntable fix
    • Replies: 1
    • Forum: Turntables
  20. R

    Marantz SA8005 No longer Open or Close

    I am working on a Marantz for a client who states it stoped opening and closing... my troubleshooting process, using a Fluke 116 only I came to the conclusion U403 on the disc driver board is bad... Linear Voltage Regulator BA25BC0-photo attached. im sure you all know manufacturer schematics...
    • Reek
    • Thread
    • repair reverse engeneer sacd super audio cd
    • Replies: 0
    • Forum: Digital Sources
  21. J

    Quad 303 repair

    I'm finally restoring my inherited Quad 303! I'm following this guide: https://www.rs-online.com/designspark/refurbishing-a-classic-quad-303-amplifier I've replaced all the capacitors and everything went good ;) Now to the problem: Adjust RV100 for 33.5 volts between tags 5 and 9 One of...
    • jr2joao
    • Thread
    • quad quad 303 repair
    • Replies: 0
    • Forum: DIY
  22. quadmatrix82

    Sansui 9090 help factory or previous repair mods?

    Hi all, I’m in the process of refurbing a Sansui 9090 I’ve had in long term storage. I’ve come across two mods which I’m not sure if I should replicate in the restoration or bring back to original design and hoping someone can help Last I used this was over a decade it worked however always had...
  23. U

    DIY Nakamichi BX/MR idler tire step by step replacement guide

    Read the article here: https://ultraferric.com/blogs/news/nakamichi-mr-bx-idler-tire-replacement-diy-cassette-deck-fix Have a great day, and TAPE IT EASY!
  24. X

    Infinity RS5001 Woofer and Crossover Question

    Hey I picked up a set of these little while ago and just got around to taking a closer look. One is in perfect working condition no problems at all. The other the woofer is not working. its part number looks different than the one in the spec sheet and am curious about that its a #902-7298N and...
    • Xactorocker
    • Thread
    • electronic electronic circuits help infinity infinity 5001 repair
    • Replies: 0
    • Forum: Speakers
  25. S

    Burmester 933 MK2 fuse blown, previously worked on, guidance needed

    Hey guys! So, i got myself quite a task. Purchased a Burmester 933 amp, stated as defect, "doesn't function since some time, LED doesn't turn on". Price was good, so why not, let's give it a try. Came home, opened it up and discovered with great horror/surprise that 2 caps were missing on one...
    • soillodge
    • Thread
    • burmester burmester 933 repair repair advice help needed
    • Replies: 0
    • Forum: DIY
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