Sky HD box DRX780

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  • John843883
    Senior Member
    • Nov 2012
    • 71
    • UK
    #1

    Sky HD box DRX780

    Anyone repaired the PSU in one of these and if so is there anything I should be checking before powering it back up again?

    I've replaced all of the failed capacitors including the Rubycon ZLH's and I came across some odd schottky diodes with very high reverse leakage current Sanken "RA13" which had me stumped for a bit.

    Nearly all the capacitors on the PSU tested bad but not all had visible signs, one day it just failed to even enter standby. Is replacing the capacitors all there is to getting these back up and running again or are there other things that fail once the multiple voltage rails have been messed around by bad caps? The Sky viewing card slot went a bit finicky in the weeks leading up to it failing too.

    Thanks.
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Sky HD box DRX780

      1) Lets see the pictures of what we are dealing with.
      2) Did you test 'RA13' off the board or still connected to the circuit?
      3) How high is the leakage current?
      4) What is the applied Voltage to the RA13 to obtain the leakage current reading?
      Last edited by budm; 11-05-2019, 09:45 PM.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

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