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Old 11-14-2020, 08:29 AM   #1
pansatdishman
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Default pn64e550d1fxzc power issue

hello i have a pn64e550d1fxzc powers off and on power supply issue ? thanks
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Old 11-14-2020, 09:07 AM   #2
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Default Re: pn64e550d1fxzc power issue

It could be almost anything unfortunaely without some voltage readings being taken.
Are Vs and Va trying to reach the voltage given on the label on the back of the panel?
Have you checked to see if there is a short circuit from Va to chassis, Vs to chassis?
Do you have photo's of your boards.
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File Type: pdf Samsung_PN64E550D1FXZA_fast_track_guide_[SM].pdf (1.64 MB, 2 views)
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Last edited by dick_barton; 11-14-2020 at 09:10 AM..
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Old 11-14-2020, 12:28 PM   #3
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Default Re: pn64e550d1fxzc power issue

To add onto Dick_barton's comment, it would also be nice to know more detail about the powers off issue you described. Does it turn on and work for an hour before it powers off or does it power off before picture can even appear on screen?
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Old 11-15-2020, 12:31 PM   #4
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Default Re: pn64e550d1fxzc power issue

tvs powered on now but sometimes it shuts of when warm? when it turns off again ill take it apart and look. any known cap issues or cold solder joints i should look for thanks
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Old 11-15-2020, 03:21 PM   #5
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Default Re: pn64e550d1fxzc power issue

tvs still working
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Old 11-15-2020, 06:41 PM   #6
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Default Re: pn64e550d1fxzc power issue

update turned tv off for 45 mins unplugged plugged it back in. within 5 mins it powered off then powered back on then i couldnt power it back on it did sit in my car last night and it was very cold.
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Old 11-16-2020, 03:52 AM   #7
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Default Re: pn64e550d1fxzc power issue

Touch up all the solder joints on the power supply board.
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Old 11-16-2020, 10:56 AM   #8
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Default Re: pn64e550d1fxzc power issue

can putting it in the oven fix the solder joints?
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Old 11-16-2020, 02:52 PM   #9
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Default Re: pn64e550d1fxzc power issue

I would use a soldering iron, not an oven. You will melt all the plastic and blow up the capacitors!
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Old 11-16-2020, 04:19 PM   #10
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Default Re: pn64e550d1fxzc power issue

Okay thanks all the solder joints? I haven't tooken it apart yet it won't turn on now.
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Old 11-16-2020, 04:53 PM   #11
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Default Re: pn64e550d1fxzc power issue

At least do everything mounted to a heatsink and under a transformer. Use 60/40 leaded solder.
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Old 11-17-2020, 02:18 PM   #12
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Default Re: pn64e550d1fxzc power issue

Thanks ill have to pick that up take it lead free won't work? And does diameter matter?
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Old 11-17-2020, 02:40 PM   #13
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Default Re: pn64e550d1fxzc power issue

I use .6 to 1 mm diameter.
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Old 11-18-2020, 09:40 AM   #14
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Default Re: pn64e550d1fxzc power issue

thanks never had chance to grab the solder yet. so my tv wont power on this can still be the cause
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Old 11-18-2020, 02:55 PM   #15
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Default Re: pn64e550d1fxzc power issue

These 3 blue capacitors marked as 106 need to be replaced also. They are 10uf 50volt.
See pictures below. They will prevent the tv from turning on. They are on the y-main board.
Attached Images
File Type: jpg Screenshot_20201118-144853_Chrome.jpg (343.4 KB, 9 views)
File Type: jpg sketch-1605732587975.jpg (102.0 KB, 15 views)

Last edited by tvtimmy; 11-18-2020 at 02:56 PM.. Reason: More info
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Old 11-18-2020, 04:17 PM   #16
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Default Re: pn64e550d1fxzc power issue

Thanks what type of capacitors are they I'm use to changing electrolytic capacitors, and what rating do you recommend? Thanks
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Old 11-18-2020, 06:23 PM   #17
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Default Re: pn64e550d1fxzc power issue

I have used electrolytic caps in this repair. You have to figure out what side is the negative and the positive. I can't remember, but it was easy to figure out.
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Old 11-21-2020, 07:59 PM   #18
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Default Re: pn64e550d1fxzc power issue

thanks can you post a pic to make sure i get the right kind thsnks
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Old 11-22-2020, 04:19 AM   #19
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Default Re: pn64e550d1fxzc power issue

First picture is the recommended replacement caps. Second one is correct polarity of electrolytic capacitors. The stripe side with shorter leg is negative.
Attached Images
File Type: jpg Screenshot_20201122-041419_Chrome.jpg (169.8 KB, 3 views)
File Type: jpg sketch-1606039939740.jpg (123.6 KB, 7 views)
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