Question about Televison & Video
If your unit is dead I assume you checked the power from the wall circuit? Next all fuses should be checked. If this all checks out you will need an isolation transformer to proceed.
Be very careful during the following checks as lethal voltages will be present. With the isolation transformer hooked up check the voltage on the large capacitor in the primary side of the low voltage power supply. You should see 165 volts dc. If that is good and you are sure that the standby voltage is present, I would change all capacitors in the primary circuit and check or change all diodes in the primary circuit. If you have an oscilloscope it would be helpful to check waveforms in the primary circuit. Obviously if the primary circuit is not switching there will be nothing from the secondary.
If you perform the above procedures you should be able to find the problem.
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Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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