[SOLVED] ASTEC Power Supply model#: AA20040 (blown).

[RHeTTRoNiCS]

Hello Guys...need your advice...I got astec power supply model AA20040. It was accidentally plug-in to 220Vac (setting is 115Vac). Fuse blown and a power mosfet. However, after i replaced those blown parts and pump-in 115Vac, the fuse keep blowing. So decided to switch input to 220Vac and ofcourse pump-in 220. Result was the fuse not blown but the power supply still no output and cooling fan not spipping...Need your help....thanks a lot.

 

[pradeep.g.belchada]

check the auxilary power supply in smps. it is a mini smps generates power to the pwm controller.

 

[dsctech]

When you pumped 220V into it, was the 5VSB working properly but it just wasn't powering on?

You said a power MOSFET blew, so I'm assuming the PSU is a single forward topology, if it's double forward, check both FETs.

It also doesn't hurt to check the bridge rectifier and the input filtering capacitors.