Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old February 20th 21, 03:49 PM posted to sci.electronics.repair
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On Saturday, February 20, 2021 at 7:38:54 AM UTC-5, wrote:
On Friday, February 19, 2021 at 10:18:37 PM UTC-5, wrote:

If the voltages still stay down after disconnecting the LEDs and the main, replace the supply.
yep, voltages remained the same. still erratic.. replacing the PS.. Thanks for your help..
I think I have a KU power supply in stock. Let me free run it and check those voltages before you buy a board. Samsung does some weird things on certain models. I'll post later today when I get to work.
OK,..
The KU board I have puts over 300 V on the electros near the LED connector with the main and LEDs disconnected (just AC on the bench). If you're not getting voltage near the LED connector the power supply is most likely bad. I say most likely because certain versions have slightly different power up protocols, but I'd be fairly confident it's your problem from my chair.

is the ps board you have compatible with my tv.???

Not sure, there are several screen sizes and LED arrangements that differ between models for the KU series. Some of the KUs have a plug in wire harness for the LEDs and others plug directly into the display with an edge connector. There is a "version" number on the model number label, usually four characters. Get that version number and I'll check.

OK, the version number is.. : FAO1...

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Old February 21st 21, 06:38 AM posted to sci.electronics.repair
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Default Curved Samsung no pic

On Saturday, February 20, 2021 at 9:49:24 AM UTC-5, Hilda Winkler wrote:
On Saturday, February 20, 2021 at 7:38:54 AM UTC-5, wrote:
On Friday, February 19, 2021 at 10:18:37 PM UTC-5, wrote:

If the voltages still stay down after disconnecting the LEDs and the main, replace the supply.
yep, voltages remained the same. still erratic.. replacing the PS.. Thanks for your help..
I think I have a KU power supply in stock. Let me free run it and check those voltages before you buy a board. Samsung does some weird things on certain models. I'll post later today when I get to work.
OK,..
The KU board I have puts over 300 V on the electros near the LED connector with the main and LEDs disconnected (just AC on the bench). If you're not getting voltage near the LED connector the power supply is most likely bad. I say most likely because certain versions have slightly different power up protocols, but I'd be fairly confident it's your problem from my chair.
is the ps board you have compatible with my tv.???

Not sure, there are several screen sizes and LED arrangements that differ between models for the KU series. Some of the KUs have a plug in wire harness for the LEDs and others plug directly into the display with an edge connector. There is a "version" number on the model number label, usually four characters. Get that version number and I'll check.

OK, the version number is.. : FAO1...

Samsung un55ku650dfxza
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Old February 22nd 21, 07:28 PM posted to sci.electronics.repair
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Default Curved Samsung no pic

On Sunday, February 21, 2021 at 12:38:54 AM UTC-5, wrote:
On Saturday, February 20, 2021 at 9:49:24 AM UTC-5, Hilda Winkler wrote:
On Saturday, February 20, 2021 at 7:38:54 AM UTC-5, wrote:
On Friday, February 19, 2021 at 10:18:37 PM UTC-5, wrote:

If the voltages still stay down after disconnecting the LEDs and the main, replace the supply.
yep, voltages remained the same. still erratic.. replacing the PS.. Thanks for your help..
I think I have a KU power supply in stock. Let me free run it and check those voltages before you buy a board. Samsung does some weird things on certain models. I'll post later today when I get to work.
OK,..
The KU board I have puts over 300 V on the electros near the LED connector with the main and LEDs disconnected (just AC on the bench). If you're not getting voltage near the LED connector the power supply is most likely bad. I say most likely because certain versions have slightly different power up protocols, but I'd be fairly confident it's your problem from my chair.
is the ps board you have compatible with my tv.???
Not sure, there are several screen sizes and LED arrangements that differ between models for the KU series. Some of the KUs have a plug in wire harness for the LEDs and others plug directly into the display with an edge connector. There is a "version" number on the model number label, usually four characters. Get that version number and I'll check.

OK, the version number is.. : FAO1...

Samsung un55ku650dfxza


Sorry for the delay. I have the supply for a UN65KU7000. It's drives a different LED array and would have to be rewired to work. This place has them.. They also have both boards for a few bucks more. https://www.shopjimmy.com/search.php...un55ku650dfxza They are also good about taking returns.


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