Hi. Just found this forum. I'm trying to repair a Chinese 2500 watt pure sinewave inverter, 12 vdc to 120 vac, model DPP 25. Can I post the brand name ? I have not been able to get specific diagram from manufacturer. Here's the history. There was a mishap , it fell about 3 feet & now there is no ac output. The unit does turn on & displays correct input voltage. I am not an engineer, just a hobbist with adequate soldering skills. I have metered the input & output mosfets & have not found any 0 ohms faults. There are 2 IR2110S drivers mounted to the PSW module but I don't know how to test them. The large capacitor rated at 250V DC, 820 mfds is not getting voltage. Tech support stated it should have 180 VDC, I'm only getting .5V. I don't see any signs of physical damage, cracks, broken components, burns. I did detect a possible fault, short at C3 capacitor, removed but 0 ohms short not cleared. Also removed the PSW module, no change. There are no repair shops in my area, interested in working on this, not feasable. I am not detecting any other faults. What is the opinion of the community of components sensitive to trauma which may be causing the issue ? Advice and tips on troubleshooting and opinions on what to remove or replace will be appreciated.
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