Question about Sony KV-27V22 TV

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Sony kv27v22 TV

Set seems fine but shuts off at random intervals (can be minutes or hours) with a bright blue flash. Can be reset by turning power off and on again whereupon it returns to it's random behavior.

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  • Rd_4 Apr 01, 2008

    Thanks, I have the schematic and I'll check it out.

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Check horizontal drive tramformer for intermitance is common problem some time blows horiz transistor to or vertical IC intermintence to

Posted on Apr 01, 2008

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I'm about 90% sure it is the blue picture tube developing an intermittent heater to cathode short. I'm surprised the set isn't shutting down shortly after this happens. A service call will tell you for sure as it could also be a bad solder connection causing a similar symptom. My own procedure to check it out would be to GENTLY tap the neck of the suspected picture tube with a screwdriver handle to see if I could get it to come and go (Or get out my CRT tester and measure it with the power off). Obviously by holding the screwdriver blade you don't want to accidently short anything out as there is about 33,000 volts a few inches away from where I would be tapping. Nuff Said.

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