AVANT Power Supply circuit

Posted on Feb 4, 2014

The AVANT uses a Switched Mode Power Supply which means the heart of it is a 32khz ramp oscillator which is stopped if the overload protection circuit detects an overload. Without the oscillator running the 8 volt Standby voltage is not generated and is why your red standby light is not on.

AVANT Power Supply circuit
Click here to download the full size of the above Circuit.

We first need to establish if the situation is because of an actual power supply failure or an overload somewhere in the TV which is shutting down the power supply through the overload protection. This is best done at the connectors on the power supply board and below is a block diagram showing the connectors involved. Check the power at P46 between pins 1 & 2, be very careful

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