I have this samsung plasma, came to me with clicking syndrome! Narrowed it down to the y main board, on closer inspection on the y board small 1 amp fuse open, never had solder in fuse to hand so soldered 2 wires and crock clipped 1amp fuse inline, powered on no clicking but an smd resistor smoked slightly followed by clicking psu again, fuse remained intact! the voltage across the fuse is 15 volts.
I removed the y board and found a shorted fet circled red in picture IRFP4332 there are 2 of these the other read ok, I replaced the shorted fet and fitted back in, the set powers on and makes the right noises but screen is blank. I'm thinking still a problem on this board? all psu voltages read correct
The previous owner changed the LDVS board, and also tried to fit an incorrect y board? but think there was no damaged caused by this.
I removed the SMD transistor to test and try and see its value, when I put my probes across it pinged away
now its well and truly lost
thanks Ronnie
Topic: Samsung PS50B430 Y-main Fault? (Read 5557 times)