Re: Samsung UN55D7000 clicks but does not turn on
Alright, so I ordered a replacement power supply after my failed attempt to bring the original back to life. The replacement power supply now powers the backlights when the main board is disconnected, but upon re-connecting the main board the relay again starts clicking. Is there some kind of reset I can do on the main board?
Uzrnaim
Member
Last Activity: 02-24-2016, 07:21 PM
Joined: 12-30-2014
Location: Morgantown WV
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Re: Samsung UN55D7000 clicks but does not turn on
Nope, not even a flash....Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
1 Od_ Level 5.3
2 P_DIM4 0
3 OD_ON/OFF 5.09
4 P_DIM3 0
5 GND 0
6 P_DIM2 0
7 B13v 12.82
8 P_DIM1 0
9 B13v 12.82
10 B13v 12.8
11 Vamp 17.16
12 BLU ON/OFF 4.8
13 Vamp 17.16
14 GND 0
15 GND 0
16 GND 0
17 B5v 5.39
18 A5v 5.4
19 B5v 5.3
20 Power ON/OFF 3.38
21 N. C
22 N. CLeave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
When I measured them I actually measured off of the power board not the main board, I didn't realize the numbers weren't the same between the two. Doh.
The names in the image you linked line up with the order I took the measurements, if that helps. So Pin1 is the OD_Level, 2 is P_DIM4, 3 is OD_On/Off, etc. etc....Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
The names of the pins are in a PDF which you had linked earlier in this thread, an image of which I'll share below.
I took those measurements without any boards connected to the power supply board. According to that pdf, the backlights should definitely be on if the main board isn't connected to the power supply.
...Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
So that means that the backlight is most likely the culprit then?
...
Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
By board P/N is BN44-00428A
"The power relay is turned on by the ps-on signal from the Main board, so is the PS-on dcv steady or it is going up and down.
Read my post 8.
What dcv do you have between the two legs of the main filter cap when you run the power supply-LED driver board by itself?"
My pins measure as follows:
1 5.3
2 0
3 5.09
4 0
5 0
6 0
7 12.82
8 0
9 12.82
10 12.8
11 17.16...Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
So you're saying the relay itself may be at fault?
How would I go about this, is it repairable internally or only replaceable?
Can it be temporarily bypassed or am I going to blow something up in bypassing it?...Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
Let me clarify what I've done.
TV came to me, clicking relay no life other than that.
I measured voltages on outputs, everything was close to the spec
I disconnected the line to the main board, no clicking any more, but no backlight
Disconnect panel connections and connect main board, I get clicking
I re-capped all of the electrolytics, same exact symptoms as before.
Relay connects for ~2 seconds, then remains disconnected for ~7 seconds, and repeats indefinitely....Leave a comment:
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Re: Samsung UN55D7000 clicks but does not turn on
Sorry to dig this up, but I've got a very similar situation and felt this is a good place to start.
I've got the same unit right now, and I'm getting the relays clicking on and off every few seconds. I unplug the connector which leads to the main board from the power supply, and the clicking stops. From what I read above my LED backlight should light at this point, but I'm getting no light at all. I already replaced all of the electrolytic capacitors, but I'm still getting no backlight when the main board isn't connected...Leave a comment:
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