Page 79 - Testing Electronic Components

Switch “ON” the equipment and measure the input and output voltage of
the transformer with either an analogue or digital meter. If there are no
voltage or lower voltage then it suppose to be, the transformer need
replacement. I personally liked this method because you are testing
the transformer under full operating voltage which is very accurate.
The disadvantage is that you must be very careful when checking it
especially when the power is ‘on’. Make sure you have someone to guide
you or else you can try the second method.

79