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bad caps

  1. Z

    Yamaha RX-890 Static coming from preamp only

    Hi All I Need Help have a Yamaha RX-V90 That lost sound on right channel started a service on it I found swollen main filter caps and scratchy controls I replaced all the caps on the main and standby power board with Cemi con from Digikey USA, also cleaned all controls with deoxit when I was...
    • zx12ra1
    • Thread
    • bad caps linear voltage regulator preamp static rx-v rx-v890 yamaha
    • Replies: 4
    • Forum: Yamaha
  2. D

    Yamaha CR-220 Noise and popping after unplugged

    I could use a bit of help on this as I work on repairing this CR-220 I have have since about 1980. A year ago, I heard a pop from the right speaker in the middle of the night that woke me up. The unit was turned off when this happened. I noticed on follow up that it would pop occasionally when I...
    • DoctorDoug
    • Thread
    • bad caps bad transistor cr-220 distortion low volume noise
    • Replies: 43
    • Forum: Yamaha
  3. AJMatthew

    Yamaha C-70 Circuit Qustions

    Got a C-70 with the infamous right channel dropout. When I got it I cleaned it with deoxit but paid attention mostly to the green side since I am just getting into vintage gear and not sure exactly what to look for. So I have several pics with questions if anyone can answer them I'd love to hear...
    • AJMatthew
    • Thread
    • bad caps yamaha c-70
    • Replies: 19
    • Forum: DIY
  4. bikingbuddha

    What could be the Filter capacitors of this circuit?

    I have no idea how to figure out. What could be the filter capacitors of this amplifier circuit? it is an tube hybrid called Qinpu Q2. I hope to fix the hum / buz it has by replacing the filter caps.
  5. Cody AOC

    Is it safe to upgrade the UF on a CAPACITOR?

    So I have been looking and looking I can't find any 50v 1.5uf capacitor and it has to be an Audio cap because it is in my vintage sansui 5050 receiver would it be safe to up the uf to 2.2uf 50v since any of the voltage there is no 1.5uf in any voltage and the cap of that one is in leaky bad...
    • Cody AOC
    • Thread
    • 50v bad caps capacitor leaky restoration sansui sansui 5050
    • Replies: 3
    • Forum: DIY
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