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repair

  1. whbuddin

    Marantz MA 500U service conundrum

    OK, here’s my problem: I have six Marantz MA 500u monoblocks. I won these on eBay a few weeks ago, and were attested by a reputable seller to all be perfectly functional. In any case, they showed up in less-than-functional shape, likely due to poor packaging (he packed all six into a single, old...
  2. T

    Dual hs 36 Ceramic cartridge pre amp for MM carts?

    Not too sure if this is the correct board to ask this but I was servicing a hs 36 and I wanted to replace the original ceramic cartridge with a MM cartridge until I realised that the pre amplifier is only built for ceramic cartridges. Is there any easy way to modify the internal circuit of the...
    • TrevorBarten
    • Thread
    • dual modification phono pre amplifier repair service
    • Replies: 3
    • Forum: Solid State
  3. G

    Denon AVR-X1200W repair help

    Hello all, I am trying to repair my said AVR after it started going into protection blinky red. Have some knowledge of electronics (college courses in the 90s :)) and do solder here and there. Service manual for this AVR is here. So far, successfully replaced 7912 voltage regulator in the...
    • Gl-dunk-27
    • Thread
    • demon question relay repair troubleshoot
    • Replies: 24
    • Forum: DIY
  4. T

    Denon dp-40f service manual help needed.

    So I just did a full recap om this denon turntable I had laying around but I have no clue what how I am supposed to re calibrate it. I am trying to figure out what the service manual wants me to measure but the point I think it is talking about doesn't react to adjusting the potentiometer at...
  5. dannysan

    Local repair Seattle

    Hello, I’ve been lurking around here for a couple years. Since I have no expertise I haven’t posted much but I am always blown away by the knowledge and the open handed advice and encouragement here. I have a Pioneer SX 1250 I bought a couple years ago. It makes my ads 1090’s and 810’s sing! Now...
  6. T

    Kenwood kd -990 solenoid defective?

    I recently bought a kd 990 second hand for a pretty good deal however the arm cueing isn't working. I did some testing and I am pretty sure that the solanoid is defective. It measures 0.6 M ohms and doesn't do anything at all. Is there any chance of finding a fitting replacement? Also the auto...
  7. VanishCave

    Finally got my hands on a 4 track cart player! (It has some issues)

    Today I was excited to pick up my first 4 track cart player: a Muntz H5500 “12 track” player. I can hardly find any reference to this model online at all. It appears to be the guts of a regular automobile 4 track player along with a 12v power supply and speakers housed in a handsome...
    • VanishCave
    • Thread
    • 4 track cartridge question repair
    • Replies: 29
    • Forum: Tape
  8. C

    Teac A-3440 Repair - No Record or Pause

    Hi folks, hoping I might be able to find some advice. Received today what should be my ideal tape machine, a teac a-3440. I got a very good deal on it thanks to it only being partly tested. Unfortunately it received a couple of solid bashes on it's way to me, as well as possibly having one or...
    • Cont3mplate
    • Thread
    • damage damaged record reel repair teac teac 3440
    • Replies: 0
    • Forum: Tape
  9. A

    Electronics Repair Liabilities

    Hi all. Have a technical & etiquette situation I could use the forum's perspective on. What happened: Wharfedale Linton 85's right tweeter was blown by my recently repaired power amp (Nakamichi PA-7A II for the curious). The amp was repaired for the exact problem that blew up my tweeter: Two...
  10. Anonky

    sx-650 relay not clicking

    Hello friends. I just obtained a pioneer sx650 as a repair unit. Was told a "resistor fuse blew." As soon as I got it home, I powered it on (no DBT--shame shame, I might make one soon). All lamps work. Relay clicked. The sound was sizzling a bit but cleared up quickly. Played fine for ~5 mins...
  11. 201bk

    Yamaha NS-670 woofer repair help needed

    Hi, Long story short I got scamed by seller. And now he won't admit that he has hidden this issue. He says that I have damaged the woofer. I was doing 10wpc tops and it's first time I've heard that you can damage woofer by decentralising it with proper usage. Everything looks fine with this...
    • 201bk
    • Thread
    • help issue ns-670 repair woofer yamaha
    • Replies: 34
    • Forum: Yamaha
  12. razpones

    Sony RCD-W1, repairing the A disc drive (no play)

    Hi all, I have posted here a few times always to ask about some issue on a repair I am working on. But this time am writing to help someone that might run into the same issue. As am certain that this is a problem that happens to all this units. The Sony RCD-W1 has two trays, one is a CD player...
  13. M

    AKAI 1015 Receiver loud crack(le/pop) on power on

    Ls, My mom's Receiver makes a loud bang when turning power knob from off to speakers A. It scares her so much (she's 88) that she doesn't turn it on anymore which saddens me deeply. Type: AKAI 1050 Receiver I've got an old scope and multimeter trying to teach myself electronics and at the...
    • MacShrike
    • Thread
    • akai 1015 receiver repair troubleshooting
    • Replies: 47
    • Forum: Solid State
  14. PioneerPoet

    [Help] LXI Series All-in-One

    My friend recently dropped off this unit from his basement that’s been collecting dust. I got it cleaned and spinning well, but I have two problems. I don’t know how to operate this counter balance I don’t know what stylus I need to replace the one in the pictures
    • PioneerPoet
    • Thread
    • counter weight help lxi repair sears stylus turntable turntable advice
    • Replies: 2
    • Forum: Turntables
  15. SingleReel

    Luxman L-100 woes

    I have owned this Luxman L-100U for about two years now and it seems this unit has been nothing but constant trouble. I know it was serviced before I purchased it and it immediately had problems. I decided to have it serviced by a long time professional and he claimed the last Tech did him no...
  16. OskarBas1

    broken woofer spider, wharfedale E70

    I receny bought a pair of wharfedale E70 speakers. And they really sound great. But today when o had a listen one of the woofers started to make a weird noice. I stopped playing soon after and unscrewed the woofer to find that the spider had come completely lose from the basket. If i hold the...
    • OskarBas1
    • Thread
    • repair speaker wharfedale wharfedale e70
    • Replies: 3
    • Forum: Speakers
  17. twoAcestwo8s

    Onkyo M-5030 keeps blowing

    I have an Onkyo M5030 that I recently acquired from a friend. I recapped it but when I went to turn it on it was at first stuck in protection mode and then the main fuses blew. I replaced the fuses but again they blew. I'm not sure where to begin, I'm still fairly new at diagnosing and repairing...
    • twoAcestwo8s
    • Thread
    • fuse blow onkyo onkyo m-5030 protect mode repair repair help
    • Replies: 23
    • Forum: Solid State
  18. Barkley1969

    Raleigh NC vintage turntable repair

    Looking for someone to service a 1967 Magnavox Console in the Raleigh/Clayton NC area
  19. A

    Need help restoring console

    Hey my name is Aaron looking for somebody who can help me restore my Motorola sk52w bought it from a couple that took out the middle speaker and the chassis I out it all back in speakers aren’t hooked to which idk where to attach them but I’m also looking for somebody that I can mail out these...
  20. C

    Looking for a part

    I have a JVC QL-Y55F turntable, I saved it from being tossed in the dump, but it is missing the Tonearm and the dust cover other than that everything seems to function.. My question is two part where can I get the tonearm? I saw a couple on eBay for crazy prices. Are their other models that can...
  21. H

    JBL L100a's

    Greetings there everyone! So I came across one of the best deals I've gotten from a thrift store, or anywhere for that matter, some JBL L100a's for $25!! I didn't even spend any time looking for anything else, and purchased them and went straight home with them. That being said, they do need...
  22. C

    Replacement Parts

    Where do you find is a good online resource for replacement parts? I have a ‘77 JVC receiver that is missing the correct knob for the on/off switch. I have checked eBay and googled the part by part number, etc. What is my best option for getting replacements for model specific parts?
    • CS Borger
    • Thread
    • knobs parts repair replacement part restoration
    • Replies: 6
    • Forum: DIY
  23. 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
  24. 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...
  25. 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
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