Samsung ln22b360c5d Dead

[CraigR]

I have a Samsung ln22b360c5d that came in dead and I found the fuse blown and also a bad mosfet (arrow in the pic) so after replacing both I still have nothing. It does not blow the fuse now and I have 175v at the big cap but NO voltage on any wire coming out of the connector that goes to the main. I checked all the diodes and the caps "look" ok. Not sure where to go next.

[dick_barton]

Re: Samsung ln22b360c5d Dead

Do you have a picture of the underside of the board. It looks like you have no boost voltage on the cap.

[CraigR]

Re: Samsung ln22b360c5d Dead

No. No power over to main board.

[budm]

Re: Samsung ln22b360c5d Dead

Samsung BN44-00232A (IP-54135T) Power Supply for LN22B360C5DXZA

http://www.shopjimmy.com/samsung-bn4...er-supply.htm#

No PFC Voltage booster on this power supply-inverter board.
Pictures provided by shopjimmy.
SMD SMPS IC1018 (or 'B'?) that drive the blown MOSFET is probably damaged when the MOSFET went out.
Resistor R103 for the SOURCE pin of the MOSFET may have blown open circuit also when the MOSFET shorted out.

[CraigR]

Re: Samsung ln22b360c5d Dead

R103 checked good. Don't know how to check IC1008

[budm]

Re: Samsung ln22b360c5d Dead

Just replace it.

[CraigR]

Re: Samsung ln22b360c5d Dead

Can't read the numbers on it. worn all off.

[vinceroger69]

Re: Samsung ln22b360c5d Dead

there is a repair kit pity it dosnt say what parts are in it
http://www.ebay.com/itm/SAMSUNG-LCD-...-/130975295607

[CraigR]

Re: Samsung ln22b360c5d Dead

Yep, seen that before. might be stuck ordering it.

[CraigR]

Re: Samsung ln22b360c5d Dead

Could not order kit from the guy. He has me blocked.

[CraigR]

Re: Samsung ln22b360c5d Dead

Replaced the board and that repaired the problem.

[dick_barton]

Re: Samsung ln22b360c5d Dead

Replaced the board and that repaired the problem.

Perhaps you could say what the part was that you could not identify earlier which could be useful to others who may end up with the same problem.

[CraigR]

Re: Samsung ln22b360c5d Dead

There was no description on what came in that kit so I have no idea.

[dick_barton]

Re: Samsung ln22b360c5d Dead

There was no description on what came in that kit so I have no idea.

That's a pity.

[vinceroger69]

Re: Samsung ln22b360c5d Dead

if the tv back was still of could you look on your repalacement psu and tell us the details from IC1008 (part you could not read on old psu) thanks as this may help others too with the same issue.

[dick_barton]

Re: Samsung ln22b360c5d Dead

if the tv back was still of could you look on your repalacement psu and tell us the details from IC1008 (part you could not read on old psu) thanks as this may help others too with the same issue.

+1, Yes. that's what I was thinking.