Today my mobile charger got faulty.
I tried to check and repair. I found a transistor 13001 does not show any activity while checking with multimeter. I thought it is open (Break) and i purchase 2 new one from local shop.
but when i check that new one with multimeter it also doing same.
My checking method is as FOLLOWING:
I set multimeter on (Alarm / connectivity / diode) testing.
then connect red and black probe on emitter and collector. then reverse. and at last connect base.
but nothing appears in meter display.
Now my question is that is there any other method to check or i have bought 2 more faulty transistors.
The circuit diagram is similar with attached pic.
SORRY FOR BAD ENGLISH