I have seen quite a few that do not blow the output. Just changed one in a
KV36FV16 that would shut down on trying to start. Rings bad out of circuit,
had ringing on the collector pulse in circuit, and drive tests bad. I have
seen some Sony FBTs that ring good have a clean pulse and only test bad on
the drive tests.

Leonard


"Andy Cuffe" wrote in message
...
On Wed, 05 Oct 2005 23:03:52 -0700, Max wrote:

Hi I trying to fix Sony KV-27FS12 27' TV.Front LED blinking 4 times.I
found short horizontal output transistor D2578.After replaced and try to
turn on TV the transistor blow out again after it start working for few
seconds.There is no bad solder connections on the board.I suspect bad
flyback.Any suggestions?Thanks

Replace any electrolytics in the horizontal drive circuit. Did the
HOT get hot before it failed? If it did, I would suspect a horizontal
drive problem.

It could be a bad flyback, but the bad Sony flybacks I've seen always
caused instant HOT failure.
Andy Cuffe

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