Samsung UN65EH6000F power supply IC801

[bkeith]

I picked up a Samsung UN65EH6000F locally because the seller said it "just died" one day.

Power supply board is PSLF131C04E aka BN44-00560A.

On visual inspection, it appears that ICM801 is blown out. Most of the surface is cratered out so I can't even read a part number.

Another post about this same model refers to it as the SMPS driver. That makes sense as there is no power activity.

I'd like to find a schematic or at least identify the part number and order a replacement if possible.

Thank for any assistance.

[R_J]

Re: Samsung UN65EH6000F power supply IC801

It believe it is a FSFR1700XSL. I would also check the diodes DM851 ~ DM854, on the secondary of TM801s, and check the solder connections on TM801s

[bkeith]

Re: Samsung UN65EH6000F power supply IC801

Thanks. It looks pretty similar, but the installed IC has 9 legs and the datasheet for the FSFR line shows 10 legs with one missing.

And I scraped of the silastic and the last two letters of the part number are "AC".

I'll pull the board and start following traces to see if it is compatible.

I've found schematics for other BN44 power supply boards, but not this exact one, BN44-00560A.

If anyone else has links or notes, please speak up.

[R_J]

Re: Samsung UN65EH6000F power supply IC801

The two letters "AC" are likely the top line which is part of the date code

[bkeith]

Re: Samsung UN65EH6000F power supply IC801

On closer look, yup, you nailed it.

Looking at the datasheet https://cdn.badcaps-static.com/pdfs/...1be5f4a446.pdf

Is there any disadvantage in using the higher rated 2100 part over the 1700 part?

They are pennies difference from mouser/digikey.

[R_J]

Re: Samsung UN65EH6000F power supply IC801

most of the specs are the same, the only difference I see is the RdsON resistance is a lot lower which might be an issue (1700= 1.25Ω) (2100= 0.51Ω)