Question about NEC FORTRON/SOURCE 145W POWERSUPPLY (FSP14561GN) Power Supply
Check for short circuit on flyback transformer 44v rail and 14.5v rail
if ok also replace C821 and R826
Posted on Jun 11, 2009
What techman is saying is replace Q802 (2sa940), check the surounding components and replace fault components if nessacery. she'll be right mate
Posted on Mar 13, 2007
NEC is famous for under rating it seems there sets. Not sayying that the sets are not good but I've seen hundreds of NEC with what looks like over heating. I too hace seen several power supply problems and it comes to mind that a small choke that looks like a small resistor with wire wrapped around it has been the problem several times as you must also take out the parts that looks burnt and clean the area and take off all the overheated solder and clean up the pcb and reinstall and resolder with new solder if you want to not have intermittant connctions again. Oh almost forgot that these coils are on the output of the power supplys and make sure you check all the caps as well in the output of the power supplys as well as in the sweep supply as this can cause your sort of problem as well.. Good Luck PS if a resistor looks burnt they are so cheap you should replace it as resistors that look or have been overheated can and will breakdown under power or a load.
Posted on Apr 11, 2006
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