Finding the right field effect transistor
If you repair switch mode
power supply, the most frustrated thing that you encountered is no original
spare parts especially the fet field effect transistor. Some equipments are
so new and the parts have not arrive to your country. You have searched from
the internet and couldn't find one. In most electronic courses, you are
taught to only use original numbers when comes to replace the power supply
components especially the field effect transistor. Do you know that actually
you can find a replacement that can not only replace the fet original
number, the replacement will even work longer and sometimes better than the
original! I will just take monitor power supply repair as an example.
Many times, i came across
hundreds of different field effect transistor part number used in a monitor
power supply. If i keep each different fet part number in a component's
rack. I might need dozen of them and is a waste of money!