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Equipment Repairs => LCD TV forum => Topic started by: bonesy on July 23, 2016,11:47:44

Title: bn44-00264c power inverter board dead.
Post by: bonesy on July 23, 2016,11:47:44

Hi guy's,got one of these samsung sets in with above board fitted.Fs801s 6.3 amp fuse blown,reading short across bridge rec block +/_ connection,turns out Qp802 is short circuit.I would like to fix board if possible as new / secondhand boards are now quiet pricey.Can't seem to find any repair kits for this board other than one pfc repair.Anyone come across this fault before? baord covered in poor solder joints,so may have been the cause.Transistor type is F11nm60n.Cheers John.

Title: Re: bn44-00264c power inverter board dead.
Post by: sinclairtv on July 23, 2016,14:59:55

Just fixed one today where one of the 221k caps had shorted and blown the fuse. Sry cant remember pt no but it was near 2 links and a large diode!

Title: Re: bn44-00264c power inverter board dead.
Post by: downunder on July 23, 2016,20:38:21

Hi John,

Like sinclairtv, I did one this week where the 2 470pF 1kV diodes near the FET were shorted. Took out 2 FETs, bridge diode and fuse. Replaced all and
still no go, relays clicking on/off. Found 2 open SMD diodes and 2 open SMD resistors on the underside of the board gone.

In your board, check DP803, DP804, RP805, RP811. Schematic attached .