Troubleshoot SMPS board with laboratory power supply

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA
    #21
    Re: Troubleshoot SMPS board with laboratory power supply

    "because the guy said the main power supply is +/- 25v" Your power amplifier section used in you model does not use BI-POLAR (+/-) power supply like the one you have in the link. You can see that it only has one large filter cap in the secondary side. Your power supply has four set of rectifiers circuits. The Opamp sections needs BI-POLAR power supply and that is why it has +/- Voltage regulators.
    Again, I do not who 'THE GUY' is, he needs to look at the board and see how you board is setup.
    Last edited by budm; 10-01-2014, 12:04 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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