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Genz Benz Streamliner LED fails again

Discussion in 'Amps and Cabs [BG]' started by vb_vb, Aug 20, 2012.


  1. vb_vb

    vb_vb

    Sep 27, 2011
    Hi,

    after repair of my Genz Benz Streamliner 900 (Blue LED failed) in april this year, the LEDs failed again 2 days ago, came back yesterday for about 1 hour, then failed again.

    Is there a connector inside which I can check?

    I dont want to give it to the repair service again for two weeks
    since we have gigs coming.

    Thanks

    Volker
     
  2. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa, Product Support-Genz Benz
    Sorry to hear about this. PM me and I will take care of it for you personally. Turn around is only a day or so. There are no connectors involved.
     
  3. vb_vb

    vb_vb

    Sep 27, 2011
    Hi,

    since in germany there is no quick repair possibility, I decided to keep the Genz Benz without LED light, until i can afford to give it away for 2 weeks.

    Now,
    what happens is that after playing for 2 hours or more the LED light comes back, and stays lit for the rest of the gig as long as I do not turn off the amp.

    After turning off and turning on again it is dark inside... until I have played again for some hours.

    This I have seen now for two times.

    I do not really believe it is a bad LED.
    A LED is working or dead, nothing between, as I was told.
    Could it be that the PCB has a defect, and when the amp is warm inside,
    a broken line on the PCB (dont know the word for Leiterbahn) is expanding and then the
    LEDs have connection to power again?

    Best regards,

    Volker
     
  4. JimmyM

    JimmyM

    Apr 11, 2005
    Apopka, FL
    Endorsing: Ampeg Amps, EMG Pickups
    In English, a line on the PCB is called a "trace."
     
  5. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa, Product Support-Genz Benz
    It's a bad LED. Silicon carbide based LEDs (specifically blue and white which are blue with a yellow phospher) occasionally have intermittent pad bonds inside the package. What you may be experiencing is metalization migration at the bond. Did you ever get a replacement LED? I forget where this ended up.
     
  6. vb_vb

    vb_vb

    Sep 27, 2011
    i got the amp repaired after the first blackout.
    Repaired by Fender Germany, Düsseldorf. No Problems for 2 Month.
    They did not write what they did..
    Maybe another LED (I Think Three are in there)
    Maybe they changed only one..

    Volker
     
  7. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa, Product Support-Genz Benz
    Ok, I forgot you were in Germany. They can take care of it for you again, sorry for the problem.
     

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