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repair

  1. Anonky

    Rigging a high filter switch on Project/one Mark II help?

    Hello all. This is a long shot I feel but I have come into possession of this project one receiver that is in immaculate condition. The only problem is the high tone switch was broken at some point. I’m now trying to open it up and repair it. I have added two pictures below but I’m unsure how...
    • Anonky
    • Thread
    • help project /one repair switch
    • Replies: 3
    • Forum: Solid State
  2. jFF_Bulbo

    Marantz 4430 help.

    Hello AK'ers. I'm working on a beautiful 4430 unit. Promblems: When playing in MONO, left and right speakers sound (and sound amazing IMO) BUT when playing STEREO no sound... Well a Lot of noise and a very very low music volumen. I think someone tried to repair it before, but left a mess with...
  3. zombiemodern

    SL-1200 MK1 Woes (Negative Voltage at TR-14 collector)

    Hi AK, Was wondering if anyone here could help with an SL-1200mk1 that's seeing speed irregularity, particularly on power cycles. This is now a DIY project — a third turntable I don't really need but due to the rarity I'd love for it to operate properly. I've taken this to a local tech figuring...
    • zombiemodern
    • Thread
    • direct drive help mk1 recap repair sl-1200 sl-1200 mk1 technics transistor
    • Replies: 17
    • Forum: Turntables
  4. T

    Best way to polish turntable dustcovers?

    Whenever I polish dustcovers I always end up with a dustcover that is slightly clearer than before but still has a ton of surface level scratches. I was wondering of there is a way to get it as close to perfect as possible. I currently use 500-800-1000-1200-1500-2000-3000 sandpaper in that order...
  5. C

    MCS 6700 with missing spindle. Easy to repair?

    Looking at an MCS for my first TT and i found the super high end 6700 for about 150. Needs a new cart and is missing the spindle to hold the record. Is that an easy repair? I can get the new cartridge no problem but can the spindle be repaired easily? I read these are actually technics...
    • celtyton
    • Thread
    • mcs 6700 repair spindle turntable
    • Replies: 2
    • Forum: Turntables
  6. Doug Robert

    Grundig KS 732 U Console, no sound

    Hi all, i recently picked up a Grundig KS 732U solid state console with Turntable at the thrift store, it was powered up by another guy so i did some poking around and discovered no sound at all, light in the cab would come on but TT wouldn't power and couldn't even get static from the radio...
    • Doug Robert
    • Thread
    • cabinet console grundig radio repair service solid state stereo troubleshooting turntable
    • Replies: 4
    • Forum: Solid State
  7. T

    Technics sl 1200 mk 2 one channel louder?

    I have a sl 1200 mk 2 that's slightly louder on the left channel. I checked the resistance on both and they are pretty much identical. I also already replaced the phono cable and arm circuit board. I would rather not rewire the tonearm but considering the resistances being the same I doubt it...
  8. R

    B&K EX-442 Disaster

    Hi I own an older version of the B&K EX-442 with the golden handles, no blue front panel lines and Toshiba outputs. Recently I put it back into service after it having sat for 10 years. Fired right up with no issues. I carefully readjusted the DCOffset and Bias though it was difficult with the...
    • Ramatam
    • Thread
    • 2sj-115 2sk-405 b&k ex-442 matched pairs repair
    • Replies: 6
    • Forum: Solid State
  9. S

    Yamaha Speaker Connection

    Hi all, I've really enjoyed looking at this forum in recent months while shopping around for a 70s stereo receiver as an upgrade from the 90s Kenwood I've been using for years. For background, I am totally inexperienced with electrical repair. Last week I bought a Yamaha CR-450 for 70$ from...
    • sebby
    • Thread
    • cr-450 repair speaker wire connections yamaha
    • Replies: 10
    • Forum: Solid State
  10. buckeye56

    NYC Repair

    Hey, Don’t know which forum this question belongs in, so apologies in advance for any mistakes. Looking for a highly reputable person who isn’t going to charge a fortune to fix my vintage Technics dd automatic turntable. Cueing mech not working properly. Must be in NYC area. I know there are...
    • buckeye56
    • Thread
    • nyc repair technics turntable adjustment
    • Replies: 0
    • Forum: Turntables
  11. Normal Steg

    Should I repair my Sansui Au-7900 myself? Fuzzy left channel

    Hey there Audiophiles and Tech Wizards. I am reaching out to this community for some advice. I am a novice at repairing electronics. I can disassemble a device, deox pots, and I think I can even spot bad caps. I have repaired some really basic things, (recapped a pair of JBL L-100s, changed...
  12. J

    Turbine oil: products and vendors?

    While researching which oil to use for rehabing a reel to reel, I see a lot of people recommend to use turbine oil. Sometimes, there are specific recommendations for 'Zoom Spout turbine oil', and that it can be purchased from Ace Hardware. The closest product I've found is this...
    • jimjam
    • Thread
    • grease lubrication oil reel to reel repair tape
    • Replies: 9
    • Forum: Tape
  13. T

    Ps x800 owners, how close is your tracking force scale adjustment to the actual tracking force ?

    I am recalibrating my ps x800 and I got it pretty close (atleast I think), I have it to within around 0,10 grams error margin on every weight setting except 3 grams (which is at 0,20 error margin). I have been fiddling with it for quite a while and I am pretty much satisfied as is, but I would...
  14. goldswimmerb

    Tackling a Beast (KR-9600)

    Currently working on a KR-9600, going to the mod for saving the power switch with a triac once I get it sorted out. On arrival there was no relay click, chased down to a bad power supply transistor. Following that the relay clicked in and FM at least started to show tuning. Now what I am seeing...
  15. PROJECT 2501

    Model 32 amplifier with 100mv DC offset in the right channel

    Left channel is steady at 35mv Right channel went from 75mv to 98mv Right channel produces a disgusting buzz/humm through the right speaker that is constant no matter the amount of attenuation. Needless to say that it's in need of repair, that's a given. I'd just like to know if these...
    • PROJECT 2501
    • Thread
    • amplifer bias dc offset magic smoke marantz model 32 recap repair restoration
    • Replies: 2
    • Forum: Marantz Audio
  16. R

    Yamaha CR-400 Repair Begginner!

    Hi all, I have an old Yamaha CR-400 tuner that I picked up in university almost ten years ago at a Salvation Army, it served me well for many years, and I had it serviced once about 3-4 years ago. Last time I hooked it up, a bunch of the bulbs had burnt out, tuning wheel was giving a weird...
    • ryo_g
    • Thread
    • cr-400 diy repair yamaha
    • Replies: 5
    • Forum: Yamaha
  17. James Cox

    Citation II help!

    Alright guys so I'm pretty bummed out here. I have a citation II that I picked up about 6 months ago that had been restored to stock values and worked perfectly aside from a little more background noise than I expected. I decided since I had pretty good luck restoring a few tube amps and...
    • James Cox
    • Thread
    • citation ii dead channel power supply repair tube amp
    • Replies: 4
    • Forum: Tube Audio
  18. galactech

    Marantz Model Twenty Five?

    Hey all, A few years ago, I got a Marantz Model Twenty Five off of a friend of mine when she moved out of her house. It was owned by their grandparents, who used to sell audio gear in the 70s. Aside from my giddiness of finally being able to touch a Marantz, I was really excited to take it in...
  19. BA3000

    Cantilever not parallel with cartridge body

    Hey guys. I had my Koetsu cartridge cleaned up and re-tipped. Things looked and sounded fine when I went to pick it up from the shop that fixed it. After looking at things more closely when I got home though, I noticed that the cantilever appears to be askew from the cartridge body itself...
  20. Anonky

    Pioneer sx2500 with intermittent problems HELP!

    Hi all, Have a pioneer sx2500 on fantastic cosmetic condition that plays wonderfully when working properly. However, it has intermittent problems with both channels on all inputs. I figure that since it’s on all channels problem likely lies in the main amp unit or protection unit (AWM-004 in my...
  21. F

    Sony TA-AX22 repair

    Hi, I'm quite the beginner in DIY repairs, so I'd like some help troubleshooting. I have an old Sony TA-AX22 amplifier. The speakers don't work (no voltage at all on the outlets, but the resistance of the speakers themselves seems fine). The STK 2129chip might be at fault from what my...
    • Felixpotato
    • Thread
    • amplifier repair sony ta-ax22
    • Replies: 7
    • Forum: DIY
  22. Anonky

    Pioneer QX-949 left channel noise

    Hi all, I have a qx-949 that plays music on both channels on all inputs; however, the left channel has persistent static noise. This occurs on all inputs. For what it may be worth, dc offset in right channel is rock solid at 2.5mV. Left channel was like 60mV. Considering this problem and...
    • Anonky
    • Thread
    • pioneer qx949 repair troubleshooting
    • Replies: 5
    • Forum: Pioneer Audio
  23. C

    KT-5300 Faceplate Foam

    Hi, Folks, I recently picked up a KA-5700 along with a KT-5300. I shipped the 5700 to a tech for repair, and kept the 5300 on my bench for some cleaning. The interior of the 5300 is immaculate. It looks brand new. The outside needs some cleaning and touch-up, but nothing a little soap and...
  24. Carguy1394

    Pioneer A9 repair in 2022 appreciatte any advise help

    Hello everyone in this forum. I will be grateful for any advice and help that someone gives me because I have not repaired any amplifier so far. This is another renovation of Pioneer A9. It differs from all the repairs described so far in that most of the transistors recommended here for...
  25. Anonky

    Kenwood KR9600 dc offset... adjustment?

    Have a kenwood kr9600 in pretty good condition after a solid cleaning, working seemingly fine. Checked dc offset because why not and measurements are as follows: L channel: 5mV, R channel: 115mV. Both are stable, but the R channel is mildly concerning. I'm seeing from an old EchoWars post...
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