I have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.
It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a noise and burn some mosfet transistor. This model has also a small second auto transformer for 10% voltage regulation. I checked it out of board and works good.
I need schematics for this model or any suggestion anyone can help me?
It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a noise and burn some mosfet transistor. This model has also a small second auto transformer for 10% voltage regulation. I checked it out of board and works good.
I need schematics for this model or any suggestion anyone can help me?
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