Hello: My guess is that you have to replace with a new type of transistor. Try to order one from Sony. Even though the transistor have a same number,their characteristics is a little different.(don't ask me why).This problem happened to me so many times and I finally got to order the transistor from Sony. Also if the TV is larger than 32", I always install extra piece of Alluminium heat sink. Hope this help. Frank --- Bruce Tiedeman <btied@xxxxxxxxxxxx> wrote: > > I can not find the previous post on this problem. I > put in the original > Output transistor , I soldered the driver > transformer and connections in the > Horiz. section. I did change the .47\50 cap at the > driver transformer. > > Is there some thing else that has to be changed on > this chassis. The > transistor gets very hot. The waveform looks very > clean at the base of the > H.O.T . it starts to get hot after a few minutes. > > The original problem was a blown HOT transistor and > the special damper diode > . The R523 (.68 ohm resistor ) was over heated but > not blown. I replaced > this also. > > If I remember correctly these do run hot, just > didn't wanted to send this > out and have it come back... > > thanks for your input, > > Bruce > B&T Electronics. > > > > Help make your TechAssist online repair tips > database better! Submit your fixes here: > http://www.circuitwork.com/techassist/tip/#tips > To unsubscribe write to: > techassist-request@xxxxxxxxxxxxx > with unsubscribe in the subject line. __________________________________________________ Do You Yahoo!? Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger http://im.yahoo.com Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.