P.S., the heatsink on the QX3201 stays cool.

the other 3 in the chopper circuit get regularly warm, thats the only one
that stays cold.

could that be something? it junction tests good.




"Mike" wrote in message
...
ok, I finally got to it.


All volteges are presant and none of the fuses are blown.

now, there was a pin problem.

Now, I set my scope up, and did some more testing on the tv,

the scan gen IS working. there is a square wave pulse on the pin 8. there
is
a square wave pulse on the base of the horizontal driver transistor. BUT,
there is NO DRIVE PULSE on the collector of the driver transistor. so, i
guess its a bad transistor. I did some voltege measurements, and there is
about 41VDC on the collector.

There is 158VDC B+ on the HOT.

I did a BtoC, and BtoE check in circuit on the transistor, and it checks
OK,
but i never pulled it out of circuit.

Any Ideas?








"Q.E.D." wrote in message
...
Looking for input into whether this June 1996 build TV is worth having
repaired.

TV has worked great since purchase in 1996. Never got a great deal of
use...maybe 10 hours a week on weekends to watch mainly movies on DVD
or HBO. I figure less than 4000 hours total use. Set had been on for
about 4 hours one day and the picture just went blank...like someone
turned it off. No warning of trouble before that...no picture fade or
blooming, it just went dark. Sound still works OK.

The TV is long out of warranty but due to it's light use I was
thinking it might be worth repairing. Can anyone give me an idea how
much would be a fair rate for a repairman to come out and diagnose (I
live in Philadelphia, PA)? What's an average repair cost on a 35"
set? I realize the repair costs would be on top of the initial
estimate depending on what is wrong. On that note, are my TV's
symptoms indicative of a common problem? Based on my novice research
I think it could be a high voltage problem.

The neighborhood repair guy went out of business about three years
ago. Choosing a repair service, I'm finding, is almost impossible to
decide on blindly.

Any advice would be appreciated.

Thanks