While servicing any SMPS please be sure that always you have to
discharge the power of main filter capacitor before starting any cold test to
any component with multimeter.
nevertheless the TV is switched off,many times the main filter will be storing the high
voltage nearly 400v DC.
(1)In many cases if SMPS is using STR,if you short ine pin to another,STR
may get spoiled due to high voltage stored in main filter.
(2)You also may get a "Electric-Kiss" from main filter.
(3)It may also spoil other components.
so always before doing any "cold test" in SMPS please,please,please discharge
the main capacitor.
Then the question arises how to discharge the main capacitor.?
It is very simple, you need a bulb. just touch two point of
of bulb to two points of main cpacitor. If there is a voltage storage
bulb will glow for 1 or 2 seconds.By this it makes main capacitor
discharged.
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