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restoration help

  1. oldschools

    Looking for a vintage tube stereo restoration shop in the San Jose area

    Hey everyone, I've been a member for years but not very active on posting…mainly reading. I was fortunate a few years back to pick up this handsome mid-century JBL system at an estate sale. Includes a pair of JBL C50 Olympus S7 speaker systems, a JBL C58 Delphi cabinet, housing a Scott Kit...
  2. S

    Marantz 3250b left channel cutting out

    I have a rack consisting of a marantz 3250b and 300dc, and the left channel cuts out. It goes silent while the right continues to play music, until I turn off the speakers, max out the volume until the vu meter starts showing something, lower it again, and turn the speakers back on. Doing this...
    • sarris28
    • Thread
    • marantz marantz 3250b recapping relay repair advice repair advice help needed restoration help restoration novice restoration or repair? restoration project
    • Replies: 14
    • Forum: Solid State
  3. R

    M-90a power protect problem

    I have an M-90a imported from Japan that looks like it's spent time in a river with how corroded it is, I got it for cheap so it is what it is, but I'd like to see if I can't fix it. The unit powers on but immediately enters protection mode. I have a step down transformer I'm using to power it...
    • Rotary
    • Thread
    • pioneer pioneer 100v repair repair advice repair advice help needed repair amplifier repair help restoration restoration help urushi
    • Replies: 2
    • Forum: Pioneer Audio
  4. R

    Pioneer PL-70LII Damaged in shipping

    Any advice on how to fix this damage or am I just screwed? I've got photos from before it was shipped and it was mint. I'm genuinely gutted. I imagine it's a veneer, but I also imagine finding a replacement veneer would be borderline impossible. Not to mention the fact I'd probably need to use...
    • Rotary
    • Thread
    • damaged pioneer pioneer pl-70lii pioneer pl70lii repair advice repair advice help needed restoration restoration help
    • Replies: 72
    • Forum: Turntables
  5. R

    Champagne Face Plate Restoration

    I've got a couple CT-970s showing up from overseas next week, basically the CT-9R but without the complexity of the reverse function. However the CT-970s I picked up are in pretty rough shape with some surface corrosion on the body and tons of grime on the faceplate. I've got no idea what...
    • Rotary
    • Thread
    • champagne clean cleaning cleaning advice pioneer pioneer champagne pioneer communication pioneer ct-970 restoration restoration help
    • Replies: 18
    • Forum: Pioneer Audio
  6. kennycrippen

    NAD 214 Troubleshooting

    I’ve been restoring a NAD 214 power amp with my 9 yo son for a fun learning project. He’s been doing great with soldering and staying interested. Initial symptoms were: unit powers on, soft clipping light stays on, no relay click. Front lights stayed on even after unplugging the unit suggesting...
    • kennycrippen
    • Thread
    • nad nad 214 power amp power supply power supply board relay restoration restoration help
    • Replies: 31
    • Forum: Solid State
  7. UnaiG

    restore b&w dm602 s3 tweeter

    Hello everybody, good afternoon. I start this thread, because I have bought a B&W dm602 s3 but the dome of the tweeter coil is broken, I have already seen tutorials on how to change it is not very difficult, but I have doubts in the specifications of the replacement that I have to buy, I know...
    • UnaiG
    • Thread
    • b&w dm602 dm602 s3 restoration help speaker
    • Replies: 0
    • Forum: Speakers
  8. H

    (RCA VPT70E) Radio and Amp not powering on - my first restoration of a solid state radio, looking for help.

    Hi! I recently picked up a RCA VPT70E (circa 1970) from FB marketplace and was looking for some guidance on where to start with restoring a solid state radio. From my understanding they didn't make many of them, so it's hard to find documentation for them. It's a stereo console with a turntable...
    • hennery
    • Thread
    • amplifier capacitors rca restoration help solid state
    • Replies: 2
    • Forum: Solid State
  9. H

    Sony PS-LX7 general /restoration/ problems

    Hello all, i have many issues with Sony PS-LX7. It turns, locks speed, buttons are responsive. But tonearm is not moving because belt is stretched. Size light is not on also. Does it stay on always, or its shut down when its not needed? Main problem is that cant lower arm to touch record. Does...
  10. TangoMango

    JBL Studio Master L200s off the curb!

    I haven't been around AudioKarma for a while since I finished the restoration of these Marantz Imperial 1s (which I listen to daily and LOVE). I wasn't in the market for new speakers, nor was I necessarily "looking" for a new project, but last night, my wife and I were walking the dog when we...
    • TangoMango
    • Thread
    • jbl l200 restoration help restoration novice
    • Replies: 7
    • Forum: Speakers
  11. C

    Recieved a free pair of Sansui’s LM-330 speakers. How should I go about restoring them?

    Received a pair of old Sansui LM-330’s for free from my father recently. So far, I am liking the sound from them; I heard good things about this line of Sansui products. I would like to know the basics of restoring them. I mainly want to replace or restore the plastic wood finish, recap the...
    • CNRetro
    • Thread
    • 2 channel restoration help sansui lm sansui lm-330 vintage vintage 70's sansui
    • Replies: 15
    • Forum: Speakers
  12. S

    Hacked up Pioneer SA-9100 restoration

    A friend decided to buy a SA-9100 unseen and having no amp restoration experience, and me having a few sucesses under my belt, he passed it to me to fix for him. Now of all the amps that have sat upon my work bench in its various forms, I have never seen an amplifier with this degree of...
    • SansuiSushi
    • Thread
    • advice needed bad repairs repair restoration help restoration project sa-9100 repair
    • Replies: 30
    • Forum: Pioneer Audio
  13. Isaiah Hood

    Marantz model 140 voltage problem

    Well well well. After several years of owning my Model 140 it has kicked the bucket. I'm currently trying to repair it, and I hope those better with schematics can help me. A little back story. . . I was sleeping in my dorm room enjoying the best sleep that one can get in the military when I...
  14. WPD

    L100a Restoration - Sand or Howard Restor a Finish?

    Just picked up these JBL L100's from a local guy, all in all the cabinets and frames are in great shape but the finish isn't perfect and there are some scratches. I was thinking of sanding and refinishing with the Watco Danish oil but saw some people using Howards Restor a Finish as well...
    • WPD
    • Thread
    • jbl l100 refinishing restoration restoration help
    • Replies: 12
    • Forum: Speakers
  15. M

    Yamaha YP-D6 Service

    Hey AK, Is there anyone with a VinylEngine.com account who would be willing to share with me the service manual for this beautiful Yamaha YP-D6 that I picked up from craiglist? would like to clean it up and recap https://www.vinylengine.com/library/yamaha/yp-d6.shtml I’ve had a hifi engine...
    • mmettej
    • Thread
    • restoration restoration help service manual yamaha yp-d6
    • Replies: 8
    • Forum: Turntables
  16. akadrhouse

    Marantz 2226 Restoration - Shorting under load

    I've rebuilt a dozen or so units at this point, but I am still very much a noob when it comes to troubleshooting issues. I do have a scope, but my ability to use it is horrible other than testing clipping and setting bias with it. It is my 2226 and I decided to give it an overhaul. Unit worked...
  17. D

    Marantz 8B Restoration

    Hello everyone, I recently picked up a Marantz 8B. It was sitting in a storage area in a church that had been shut down. The local diocese was trying to sell or get rid of whatever they could that was in the building, so I went to get some office furniture on the cheap. I didn't even know...
    • Derek Miller
    • Thread
    • marantz 8b restoration help restoration novice restoration project tube amp amplifier
    • Replies: 30
    • Forum: Tube Audio
  18. angelaudio

    My Sansui 1000A Restoration

    A few weeks ago I started a thread asking for advice on ordering parts for my first ever audio amplifier restoration and some great members of AK heeded my cry for help. Here we are now a few days into the new year and I have before me the parts necessary to begin the work. I have the single...
    • angelaudio
    • Thread
    • restoration help restoration novice sansui 1000a
    • Replies: 86
    • Forum: Tube Audio
  19. J

    Resistor Fail Modes in Vintage Receiver (Marantz)

    Hi All, Do you know what might be the most probable failure mode for a resistor within a vintage receiver? The context: I recently opened up my Marantz 2220B for a cleaning and I realized a resistor within the power supply assembly board (R805; 330 ohms, 2W, 5%) looked very discolored with dark...
    • jorgealk
    • Thread
    • capacitors marantz recap and restoration resistor burned resistors restoration help
    • Replies: 19
    • Forum: DIY
  20. churchill127

    Kyocera A-710 restoration project

    Hello Akers, I recently bought a Kyocera A-710 integrated amplifier. This is a wonderful amplifier, but it needs a little love, I think there is a slight volume imbalance between channels. I want to restore the power supply and power amplifier boards beyond just a standard recap of all the...
    • churchill127
    • Thread
    • capacitor coupled integrated amplifier kyocera restoration help restoration project transistor equivalent
    • Replies: 2
    • Forum: Solid State
  21. DanielMac

    Suggestions for Foster Loudspeaker restoration project?

    I scored these Foster loudspeakers at an estate sale a few years back. I thought they were end tables. Surprise, they’re speakers. They sound decent enough as is, but I’d like to try improving them. This will be my first time working on a speaker, so I appreciate any conversation, tips or...
    • DanielMac
    • Thread
    • foster loudspeakers restoration help restoration project speakers - suggestion
    • Replies: 11
    • Forum: Speakers
  22. jFF_Bulbo

    Sansui 9090 help!

    Hello AKers I am working on a 9090 unit, previosly not-so-good repaired. After recap and resolder al the bad joints, i still having the problem before i treated the unit: Sound come and go with some volume, more that 25% volumen and the unit behave as in the video...
  23. mhz

    Marantz 2238 Transistor Replacement

    Hello! I am new to AK but have been around quite a bit and have to thank everyone for all the great information here which has helped me a ton. I recently picked up a Marantz 2238 (non-B) in need of some care from a local record store. Don't think it has ever been serviced before; lamps were...
    • mhz
    • Thread
    • 2238 marantz restoration help transistor transistor replacement
    • Replies: 5
    • Forum: Marantz Audio
  24. K

    Polk SDA-1C Restoration?

    I came across a cheap pair of Polk SDA-1Cs and decided to pick them up as a project. Not sure what all has been stuffed in these, but at a glance: two original tweeters, two missing tweeters 3 mystery midrange drivers 5 original midrange drivers Several of the midrange drivers are bad and...
    • Keswiik
    • Thread
    • polk restoration help sda 1c
    • Replies: 28
    • Forum: Speakers
  25. jFF_Bulbo

    SANSUI AU 7900, HELP!

    Hello AK'ers. I´m working on a AU-7900. before the recep: No short on DBT, no relay click After recap: No short on DBT, no relay click I recaped F2596 board, all 'litycs are new. All output transistors are new's, On Semi 93g/94g installed. Transistors TR601, 602, 603, 605 & 605 are new. Relay...
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