Question about Televison & Video
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Posted on Jan 02, 2017
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This denotes a problem with the switching power supply or the high voltage power supply. what is happening is the safety relay is being actuated by the shutdown circuit. Any number of things can cause this proble but more then likely the problem is in the high voltage power supply section and or its associative circuitry. The switching power supply and the high voltages power supply have very dangerous voltages and I would not suggest that you work on the TV set unless you do have a background in electronics. If you do not I would suggest that you take the TV set to an electronics shop for repairs. If you do have a background in electronics, you will need the following items:
1) A schematic diagram (to know where voltage and signal test points are located and to have a reference of the levels.
2) A multimeter (to measure the DC voltage levels on the TV Set)
3) An oscilloscope (to measuer the AC voltage and signal levels in the TV set and compair them to the values in the schematic)
4) A signal generator (to generate a reference signal for troubleshooting)
I hope this helps,
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