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cr-420

  1. C

    Yamaha cr-420 intermittent distortion and bias drop. Output level triggered.

    Hello guys, I need your assistance once again. I bought a yamaha cr-420 for dirt cheap. Symptoms - distortion in left channel. I was surprised it worked flawlessly for like half an hour. Then it started to act up. Well, this was't the only problem. Right channel bias couldn't be adjusted. I...
    • Cichoslav
    • Thread
    • bias cr-420 distortion receiver yamaha
    • Replies: 14
    • Forum: Yamaha
  2. JB8

    Yamaha CR-420 Dead Tuner

    Picked up a CR-420 that initially tested fine across the board - tuner, phono, Aux, etc. But then the tuner stopped working all together - no led's, no signal meter movement, no sound on AM or FM. Now, it didn't just die, it kicked and screamed a bit, I thought it was dead, then it came back to...
    • JB8
    • Thread
    • 12v cr-420 tuner yamaha
    • Replies: 11
    • Forum: Yamaha
  3. JB8

    YAMAHA CR-420 Headphones Great! Speaker outs? Not so much...

    Keep it pithy! I'll try! Recently found unit in decent, yet very dirty shape. Pretty sure I'm the first person to poke around under the hood, started with cleaning, including DeoxIT, tightening chassis ground screws, exercising knobs, push buttons, polished the bright work as well - all of this...
    • JB8
    • Thread
    • cr-420 distortion speaker output yamaha
    • Replies: 31
    • Forum: Yamaha
  4. J

    CR-420 single channel distortion

    Hey folks, This is my first thread in here and just kind of dipping my toes in to the hi-fi problem-solving world. My CR-420 is giving me intermittent distortion from the right channel. It goes away for a time if I toggle the A/B on/off switch a few times. Would that indicate a problem with...
  5. Y

    Yamaha cr-420, B&W speakers, 4ohm/8ohm

    Hey guys- I don’t know much about electrical engineering, so I’m curious if my receiver can handle the speaker set up I have. I am currently running a cr-420 in my small city apartment living room, and I have it paired with B&W DM 601 s1 (8ohm) as main speakers, and my remote speakers are B&W...
    • YamaHaHaHa
    • Thread
    • 4 ohms 8 ohm speakers b&w 202i b&w dm-601 cr-420
    • Replies: 5
    • Forum: Yamaha
  6. S

    CR-420 with left channel distortion

    So I've cleaned this guy and replaced all the capacitors in the power supply section. I thought I finally had it working and it sounded great on headphones. I hooked up some speakers and it initially sounded good, but I've started to get an intermittent distortion only in the left channel. It's...
    • skidmarks70
    • Thread
    • cr-420 distortion in one channel
    • Replies: 53
    • Forum: Yamaha
  7. S

    Incorrect cap in a CR-420?

    Hey folks, I started working on my CR-420 again. I actually pulled a couple capacitors in the power supply to try and test them and then realized that my meter wouldn't work on the big ones. Duh. Anyways, I put them back in (with the correct polarity) and did some more cleaning. Powered up and...
  8. A

    CR-420 Transistor Replacemnts

    Hi this is a call for help for all good hearted geniuses out there. I got a non-working CR 420 a couple of years ago and I have got it to work a couple of times but for very short time. I decided to replace the transistors and it is being hell. I was wondering if anyone out there has a list of...
    • adolfo
    • Thread
    • cr-420 transistor replacement transistor substitution
    • Replies: 5
    • Forum: Yamaha
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