CT-36HX40CB dead, horizontal output shorted, nothing else bad, replaced it, now it starts up, but only momentarily, but shuts right down. All B+ voltages come up, but go right back down. I got the service manual from the Panasonic site, but there's no schematic. Has anyone repaired one of these for this fault? Thanks, Dani.
36" Panasonic dead.
Dec 23, 2006
2 Replies
I'm not familiar with this chassis, but it is probably a bad B+ regulator. Usually in the neighborhood of 120-160vdc. May be an STK series IC. This is a common failure mode. B+ voltages look good at startup, but rises above regulated level and unit shuts down. You don't have time to see the overvoltage before shutdown. I never figured out if the output transistor shorting overloads the regulator or the regulator failing destroys the output transistor, but it happens a lot.
Comon problem with this chaxic...replace the fly back
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required