sony xbr d board problem

[midnx]

Yes, they are socketed now. I'll look at the capacitors around the fets. Could it be an intermittent problem with the flyback. Is there any way to test the IC's out of circuit?

[rca2000]

Also==did you use SONY replacement parts for the FET"s ? Sony sets do NOT like generic parts at all. And the thermistors/VDR's--MUST be the sony #s or you will get what you did. Been there...DOME THAT1!

[midnx]

the mosfets were genuine sony pulls. The thermistor is a generic. it measures the same as the one that came out. Same part number, different color. I can't find any more of those mosfets in my collection and can find no source for them.
Any ideas?

[rca2000]

If...that "thermistor" is the one off the gate of those transistors--it is NOT a thermistor, but rather a VARISTOR_-and you MUST use the original # on it--or the Sony #, I recall trying a generic varistor. It came up--I got HV for maybe 3 seconds...then BANG !! Out went everything !!

ALSO--make SURE nothing went in the horiz out area, such as the h-out--even if this set uses a split deflection system--it STILL uses a H out transistor.