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power supply issues

  1. R

    Thorens TD 318 AC adapter problem

    Hi everybody. I got myself beautiful Thorens TD 318 turntable about a month ago. My power supply was making some noise while plugged in and I realised that it was not match with my turntable. My turntable needed 16v and 150mAh while supply I got supplied 10v and 300mAh. Now i got myself new AC...
    • RetroManHR
    • Thread
    • power adapter power supply issues thorens thorens 318
    • Replies: 0
    • Forum: Turntables
  2. mstap42

    Marantz SR-48mk2 Receiver - Power cycles off and on

    Greetings, Someone gave me a Marantz SR-48mk2 receiver. A protection relay or something had begun cycling the power off and back on in shorter and shorter intervals until it finally stayed off. Idk whether it is the power protection or speakers protection. A respected local electronics repair...
    • mstap42
    • Thread
    • marantz power supply issues protection relay
    • Replies: 2
    • Forum: Solid State
  3. Usedtoyman

    dbx 3BX-DS will not power on?

    I have a cosmetically new looking dbx 3BX-DS both in and out, I'm new to electronics repair so I know very little, that won't power on. Can someone walk me through determining why it won't power on? Where do I put my meter's probes to determine if power is coming in or not? Like I said, know...
  4. tutor_turtle

    MA6600 blows fuse

    I have a customer I repaired this amplifier for twice. Both times it went into protection and the heatsink got very hot. In 2016, I replaced the left channel amplifier board as an assembly. At that time the whole assembly was only $220 16 months ago, the same symptoms appeared on the right...
  5. A

    Marantz 1150 Power Supply Issue

    Working on restoring a very nice condition 1150 but am running into a couple issues, and really struggling to identify the source. Started by recapping P800 power supply with mostly Nichicon PW/PJ as well as a couple of Rubycon ZLJ caps of originals equivalent value. Also fully cleaned the...
  6. M

    2252B power/amp brd issues

    I've run into a problem with this 2252B. I've been working on it for quite a number of hours. When I first got it, I inspected it inside, and figured it safe to energize. When I did, the protection relay closed in and everything seemed normal. I then recapped all of the boards, including the...
  7. S

    Fisher 400 both channels distortion

    My Fisher 400 seemed to hit some trouble today. I went to listen to dizzy gillespie for xmas eve and what I heard didn't sound like the dizzy I know. The music is there but choppy and distorted almost like poorly received FM stations crossing bands. This is happening on both FM and Aux, I...
    • streetwise
    • Thread
    • fisher 400 power supply issues troubleshooting
    • Replies: 76
    • Forum: Fisher
  8. Dr.Turner

    JVC QL-A2 DD that plays: Hooouuuuuteeiiiiiiiillll Caliiifooouuuuuurniiiaaaaah

    Hello everybody, last week a friend gave me his JVC QL-A2 turntable with speed issues: wobbling sound and no strobe light. Inspecting the board showed a couple of leaking capacitor and two broken diodes (probably from the leak-glue hotmix) in the PS: "piece of cake" I thought “replace the...
    • Dr.Turner
    • Thread
    • jvc ql-a2 power supply issues speed problem
    • Replies: 27
    • Forum: Turntables
  9. simplyvolkol

    Kenwood 6050 I am going crazy

    So, I just found out that the transformer in this thing is outputting 70V instead of 34V and I do not know what would be the cause of this nor how this would happen. I do know that transformers output a but more than their ratings when not under load but I doubt that margin would be over 10V...
  10. toymanmsp

    SONY STR-7055 - NO OUTPUT - DC OFFSET & BIAS Values WAAAY out of spec.

    Greetings all, I'm rebuilding my 7055 but am in need of some HELP!! I am a novice/newbie to rebuilding vintage gear. That said, I have successfully rebuilt several Pioneers and Sansui's but this is my first go with a piece of SONY gear. I love the looks and particularily the sound from this...
    • toymanmsp
    • Thread
    • bias adjustment dc offset no output power supply issues sony str-7055
    • Replies: 13
    • Forum: Solid State
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