Re: UE55F7000ST clicking on/off
Don’t think it’s Icon now as when 12v applied to it standalone all 3 blue Leds light up
i’m thinking maybe PS now as I don’t think it should be clicking in any combination
of connectors in or out.
Can anyone confirm that? the PS is BN44-00633B
I found a schematic for PS BN44-00633A but i have no idea of the differences.
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Last edited by shandy; 06-21-2022, 05:31 PM.
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Re: UE55F7000ST clicking on/off
Well I'm still flummoxed
PS Board still stays on if left overnight with or without Backlights attached but main board detached. Second power on it clicks on and off with backlights.
with main board attached it clicks at a slower rate and Backlight won't come on and no sound at all now. The Tcon board shows only two blue leds light up they flash on and off in sync with the relay clicking about every eight seconds the red standby led flashes twice for five times between the clicking.
I Have read in a few...
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Re: UE55F7000ST clicking on/off
I sent him a PM so hoping he will reply!
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Re: UE55F7000ST clicking on/off
Well it took a while all resistors appear in spec, I am now suspecting something with the main board. I found a youtube vid of a tech that disconnected a similar Samsung PS board from the main
board and that one clicked in sync with the BL leds going on and off also, he bridged two of the pins with a resistor and that kept the BL on, his socket was a bit different to mine so i’m a bit reluctant to try it.
I now am getting the standby led flashing on and off 2 times with 5 repetitions every time
with one of the tcon leds...Last edited by shandy; 05-20-2022, 08:27 AM.
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Re: UE55F7000ST clicking on/off
I am still looking, original problem remains
tested all electrolytic caps out of circuit, they tested ok with the ESR within
spec, the tantalum ones tested no ESR out of circuit.
tested all power gets and the 3 schottky rectifiers out of circuit
tested all smd transistors and fets they seem ok
tested all transformers
will do resistors next
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Re: UE55F7000ST clicking on/off
yes, will do that also, so far I’ve found a couple of small tantalum bead caps
with in circuit ESR of 6.8 ohm while others measure 0 I will take them out and
re measure out of circuit.
thanks again!
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Re: UE55F7000ST clicking on/off
OK, many thanks, I will take a much closer look and measure the ESR of
all the caps.
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Re: UE55F7000ST clicking on/off
here's the downside and another BL as the first one was a bit hidden by the sockets...
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Re: UE55F7000ST clicking on/off
Hears the photos as requested, thanks
oops haven't done the downside yet will do after dinner thanks...Last edited by shandy; 05-10-2022, 10:58 AM.
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Re: UE55F7000ST clicking on/off
yes that's correct it clicks every time, my guess is if i leave it overnight
the first power on would not click.
I took some voltage measurements across some caps
the main 400v caps were going on and off and went to 385v
one of the caps showed a stable 5v
and another I think was the 3.3 which was going on and off.
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Re: UE55F7000ST clicking on/off
Many thanks for your reply
I think you maybe helping me get there!
I unplugged all leads from power supply first time power on no clicking
turned off and on again it clicks a bit faster still
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Re: UE55F7000ST clicking on/off
Many thanks for your reply!
With the main board disconnected the power supply board clicks a bit faster
and the backlights go on and off at the same time.
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Re: UE55F7000ST clicking on/off
Many thanks for your reply, I did actually look at the solder joints under magnification
and touched some up, I should have mentioned that.
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UE55F7000ST clicking on/off
Samsung led tv UE55F7000ST
having problems diagnosing this TV
The common problem that i'm having is the relay in the power supply board clicks on and off, at same time backlight goes on and off and can briefly see the smart tv logo.
At the moment I'm thinking it is a faulty tcon board and if i disconnect it the tv will power on and stay on with sound coming through as it would normally but no smart tv logo.
The strange thing I found is if I leave it turned off for a long period
of time say overnight the TV will come on as normal, then...
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Re: New Members - please post your introductions here
Hi I'm Shandy
I have been an electronics hobbyist all my life buy not fixed Led tvs yet, done a few plasma's which had power supply problems, and old CRT Tvs (now thats going back a bit)
hoping to widen my knowledge with these forums.
Cheers!
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