Question about Sony FD Trinitron WEGA KV-36FS120 36" TV

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On and off

Sony kv-32 tw25 the picture keeps flashing on and off

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  • mick 11 Nov 18, 2008

    same problem picture flashes on and off.

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Hello pincantalupo and mick_11,

This might be a problem with the High Voltage, CRT, or the video circuitry. I would first suggest that you have a qualified TV repair technician troubleshoot and repair your televisions. Because these section contain dangerous voltages and can kill you if you make a mistake. So that being said here are some suggestions that you can pass on to the technician:

Check the voltage and signal level from the Video processor to the CRT socket board (this should determine if the video signal is good and that the biasing voltages on the video section components is good)

Check the voltage and signal levels of the Horizontal and High Voltage power supply section (This should determine if the High Voltage supply to the CRT is good and that the circuits of the horizontal section are functioning as specifications mandate)

Check the anode voltage on the CRT with a HV probe and do a diagnostic of the CRT with a CRT Test set (Something like the B&K 490B CRT Analyzer). (The test with the probe will determine if there is sufficient voltage at the anode of the CRT, and the CRT analyzer test will determine if the CRT is defective).

I hope this helps,

Thank you,

Shuttle83

Posted on Nov 22, 2008

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