I have a probably stupid to the electronic gods n gurus pertaining to component testing I know certain components must be removed from the board for testing to get accurate readings, but I will be testing a TMS94481CT transformer and am wondering if I can test while still connected in board?
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Re: component testing
Are you talking about the Current Sensing Transformer? It more likely to have burden resistor connected in parallel.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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Re: component testing
OK, it is inverter transformer with two high voltage windings, you can do the comparison reading of the high voltage resistance first.
Here are the pinouts:
http://lcdparts.net/TransformerDetai...ProductID=4010Never 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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Re: component testing
I have a dynex DX22LD150ALL led TV that was working fine last night, watching DVD when screen went black. hear sound just fine, shine a led flashlight at it, can see pic. please wait message flashes on screen at startup, then screen goes black. All searches leaned more to the transformer having gone bad, not so much the backlight bulbs and all logical responses found came from this site
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Re: component testing
LED backlights TV does not use high voltage transformer like the one with CFFL. Common failure in LED backlights TV are due to bad LEDs.
I already gave you the link for the pinout of the inverter transformer, you can check the secondary side DC resistance to see if they are within 3% of each other, it also may not be the transformer.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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