CR-2040 pop when turned off ONLY, not on turn on.

Discussion in 'Yamaha' started by mr_light, Jan 8, 2013.

  1. BRUT60

    BRUT60 AK Subscriber Subscriber

    Messages:
    27
    Location:
    Tennessee
    Had the same problem with a Kenwood KR-7050 last month and it turned out to be the speaker relay.
     

     

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  2. mr_light

    mr_light AK Subscriber Subscriber

    Messages:
    322
    Location:
    Silver Spring, MD
    The load (resistance?) I am trying to duplicate with resistors is: 5 series pairs of bulbs (each is 14v 80ma) in parallel attached to a 28V DC source. I also understand you can't measure the resistance of a bulb when it's off. Help.
     
    Last edited: Feb 19, 2013
  3. mr_light

    mr_light AK Subscriber Subscriber

    Messages:
    322
    Location:
    Silver Spring, MD
    I am planning on trying a 20ohm 20Watt wire wound load resistor in parallel with my string of LEDs. I am hoping 20 Watt is a high enough power rating.
     
  4. fernarias

    fernarias Super Member

    Messages:
    1,082
    Location:
    Merced, CA
    Use ohms law, R = V/R. Measure the voltage drop and the current of the bulb and you can figure out the resistance when on.
     
  5. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,802
    Location:
    uk.. the middle bit
    with your original lamps in circuit measure the current draw either directly with an ammeter or over a known resistor then work out the extra load necessary for the circuits to work ..
    or just stick with the proper lamps .. you wont be saving the planet much by using led lamps .:D
     
  6. mr_light

    mr_light AK Subscriber Subscriber

    Messages:
    322
    Location:
    Silver Spring, MD
    Measured bulbs cause a voltage drop of 26.7V to 23.8V drop of 2.9V. Current (assuming I measure properly) is .22mA. Still not sure how to calculate resistor value and power rating.
     

     

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  7. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,802
    Location:
    uk.. the middle bit
    over what value resistor did you check voltage drop ?
     
  8. mr_light

    mr_light AK Subscriber Subscriber

    Messages:
    322
    Location:
    Silver Spring, MD
    Just the resistance of the bulbs I'm trying to replace with resistors.
     
    Last edited: Feb 25, 2013
  9. mr_light

    mr_light AK Subscriber Subscriber

    Messages:
    322
    Location:
    Silver Spring, MD
    If I wanted just approach this in terms of SAFE experimentation, with the idea of using the smallest load that will drain off excess current at shutdown. Where could I start in terms of resistors and what steps could I test?
     
  10. master_fo

    master_fo New Member

    Messages:
    7
    @avionic: can I have your CR-2040 list? I am considering refreshing/upgrading phono stage caps and the big power banks.
     
  11. master_fo

    master_fo New Member

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    7
    Yes I can attest I had the same experience.
     

     

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  12. avionic

    avionic " Black Knights " Subscriber

    Messages:
    41,563
    Location:
    Fort Dodge, Iowa
    That list is long gone..If you have a 2040 in front of you. Make your own list.
     
  13. avionic

    avionic " Black Knights " Subscriber

    Messages:
    41,563
    Location:
    Fort Dodge, Iowa
    Welcome to AK BTW...Start a seperate thread for your 2040.:thumbsup:
     

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