Dropped on hard floor and now just 1/2 second LED illumination. No sophisticated chippery inside, an LM324 and 2x TL494, no SMD unless under something. No obviously failed solder joints of big lumps or elsewhere , no cracked pcb.
4 IRF740 and 4x RFPN06 and a 7812 complete the main active stuff, what would be most likely mechanical failure inside? DIP IC, transistor, diode, other?
Look wherever something heavy is attached to something light, and at some angle other than aligned to the drop force. Anywhere there is heat at such a connection, irrespective of the angle-of-force.
This will be something that bright light and a magnifying glass will reveal along with the usual 'wiggle-it-a-little". And, as you are not getting _any_ symptoms, I suspect more towards the input side of things.
Peter Wieck Melrose Park, PA
error in title, renamed model. First one of these things I've looked at, no SMD but lots of on-end "6 transitor radio" fashion minor comps. First thing to try is cleaning and refitting the 2 TL494 as they're in sprung sockets for some odd reason
cracked ferrite core causing over current fault?
those things usually both sides of the output outlet differential relative to chassis ground and they have a kind of ground fault sensor to shut the inverter off if there is any significant flow to the ground pin.
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Cracked ferrite of the inverter transformer or AC output RFI filer torroid with live and neutral turns both around it?
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