I have a samsung hl67a750 led dlp tv, i have had it over a year now
and of course it is out of warranty. Picture went out, i looked in back,
main power supply and a sub power supply. Checked the main- ok
the sub power supply cap, was enlarged a little, on sub power supply
that sends power to the led lights marked on board is says 16v,
with meter, turn on, voltage to led driver board starts out at 15.78
and of course tv wants to restart so voltage drops and unit restarts.
Taking a chance i ordered a cap from digikey,(same value)
and have the same results.
At one point i unpluged the connections that go to the led's
r,g,b, turned unit on and one by one pluged them back in to place
wow a picture,,,or so i thought, sounds like the transformer on sub power board is buzzing.
I have been looking all over internet for some info about this model and can't
find much,i did how ever find a video on you tube about sub board replacment
the poster from saudi arabia emailed me a repair manual but no real voltage numbers that i can work with.I don't know what the main board is designed to send to the sub board. Has anyone worked with this model?
and of course it is out of warranty. Picture went out, i looked in back,
main power supply and a sub power supply. Checked the main- ok
the sub power supply cap, was enlarged a little, on sub power supply
that sends power to the led lights marked on board is says 16v,
with meter, turn on, voltage to led driver board starts out at 15.78
and of course tv wants to restart so voltage drops and unit restarts.
Taking a chance i ordered a cap from digikey,(same value)
and have the same results.
At one point i unpluged the connections that go to the led's
r,g,b, turned unit on and one by one pluged them back in to place
wow a picture,,,or so i thought, sounds like the transformer on sub power board is buzzing.
I have been looking all over internet for some info about this model and can't
find much,i did how ever find a video on you tube about sub board replacment
the poster from saudi arabia emailed me a repair manual but no real voltage numbers that i can work with.I don't know what the main board is designed to send to the sub board. Has anyone worked with this model?
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