what controls the 5v standby on this power supply?>

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  • mattstolte
    Badcaps Veteran
    • Dec 2013
    • 612
    • usa
    #1

    what controls the 5v standby on this power supply?>

    I have less then 1 v on this 5v standby on this power supply can anyone guide me what to fix or test to fix it? the fuse is good.
    Apex HDAD240W401 (MT40420, 909H1504) Power Supply for LD4088
    Attached Files
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: what controls the 5v standby on this power supply?>

      The small transformer on the bottom right is the STBY power supply section.
      I see 3 small lytics caps to the left of the transformer that you should check or replace. You can try heating them up with hair dryer them apply the power to the board to see if you will get normal Voltage.
      The devices on the heatsink to the right are the rectifier diodes that you should also test.
      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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