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repair

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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...
  9. 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...
  10. 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
  11. 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
  12. 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
  13. 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...
  14. 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!
  15. 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
  16. 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
  17. tlann

    HH Scott Stereomaster 340b — Service Advice

    I got a little carried away yesterday morning and accidentally won an auction for a Scott 340b with a nice wood case. I got it for a decent price but will have to pay for shipping — and I have no idea what shape the receiver is in, other than that it's cosmetically pretty good. Even if it starts...
    • tlann
    • Thread
    • hh scott repair repair advice scott scott 340b stereomaster stereomaster 340b tube tube amp
    • Replies: 14
    • Forum: Tube Audio
  18. 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
  19. sean sweeney

    Looking for Altec 604b kit. And possibly cap.

    Oops I think I forgot to edit my title. But it's not entirely out of the question regardless. I was working at a church last night and installing a new Leslie for them that I rebuilt and I saw this rather generic looking speaker box over in the corner but it had a shape kind of familiar so I...
    • sean sweeney
    • Thread
    • 604b altec altec lansing 1940s coaxial duplex repair salvage
    • Replies: 6
    • Forum: Speakers
  20. Fisher_KS-1_Speaker_1963 (rep3 A231).jpg

    Fisher_KS-1_Speaker_1963 (rep3 A231).jpg

    KS-1 sealed sides and corners
    • OTH
    • Media item
    • enclosure repair
    • Comments: 0
    • Album: Vintage Speakers
  21. mrehorst

    Quad ESL-63 rehab

    I recently bought a pair of ESL-63s via CL for $300. One speaker plays fine, the other makes lots of noise. I have started the repair process on the noisy speaker. I'll go through the other one after I get the bad one working properly. Right now I'm looking for suitable replacements for all the...
    • mrehorst
    • Thread
    • electrostatic speaker esl-63 repair
    • Replies: 82
    • Forum: Speakers
  22. D

    Kenwood KR-710 No Audio Output Speakers A

    I have a Kenwood KR-710 that has audio output from both left and right on Speakers B setting but no audio from left and right on Speaker A setting. I would like to ask for anyone's suggestion/expertise in rectifying this issue. I have a basic knowledge of electronics repair but, as an amateur...
    • DyingFast
    • Thread
    • audio issues fix kenwood kr-710 no audio repair
    • Replies: 3
    • Forum: DIY
  23. G

    Need help fixing my first cd player

    Hello, I got an old (2002) RCA RP3755A CD player at Goodwill today and it does not work. I'm not quite sure why, I suspect the gears in the CD spinner or the playhead control need lubricating or something. No matter what the problem is, I need to disassemble it somehow. So far I've managed to...
  24. M

    Fisher 200-T has no audio on left channel on main speakers or headphones

    Hello, I was given an old Fisher 200-T receiver/amplifier from my grandparents. I set it up last night, and am having some issues with the left audio channel. The audio level is extremely low, barely discernible but it is there. The right channel works (mostly) as expected...
    • maples
    • Thread
    • repair
    • Replies: 8
    • Forum: Fisher
  25. Roman68

    Discman Welltech. NO MORE NOISE! My story.

    Good day to everyone! I encountered an issue with the drive of a CD Discman, and I think this story might be useful to many fans of these players. I’d like to share the repair process of a CD Discman from the 2000s by Welltech. I bought it for a few euros as a non-working unit and brought it...
    • Roman68
    • Thread
    • cd player discman laser mp3 noise portable player repair restauration walkman welltech
    • Replies: 6
    • Forum: Digital Sources
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