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Hello to all,
I am trying to repair an inverter with a blown trace in the swith (on/off) circuit (visible in the picture where it is black).
When i opened it i found :
1- an exploded mystery SMD black component (the one in blue on the top) i think it is a diode... not sure
2- a shorted mosfet (in blue in the picture)
3- a diode that leaks both ways (in blue)
In the picture, you can see :
1- in red the windings of a transformer which has been removed from the PCB to view the traces.
2- in blue the shorted components.
3- in yellow the ground paths.
When i changed the burnt components and try to turn it on, it outputs some AC voltage but stops because of a main short. The thermal camera shows the mystery component, the mosfet and transformer getting real hot. I believe the mosfet switches the Ground straight to the positive, passing by the mystery component...
The ON/OFF switch basically passes ground to some smd transistors (see my hand drawn diagram).
Thanks for any input.
I am trying to repair an inverter with a blown trace in the swith (on/off) circuit (visible in the picture where it is black).
When i opened it i found :
1- an exploded mystery SMD black component (the one in blue on the top) i think it is a diode... not sure
2- a shorted mosfet (in blue in the picture)
3- a diode that leaks both ways (in blue)
In the picture, you can see :
1- in red the windings of a transformer which has been removed from the PCB to view the traces.
2- in blue the shorted components.
3- in yellow the ground paths.
When i changed the burnt components and try to turn it on, it outputs some AC voltage but stops because of a main short. The thermal camera shows the mystery component, the mosfet and transformer getting real hot. I believe the mosfet switches the Ground straight to the positive, passing by the mystery component...
The ON/OFF switch basically passes ground to some smd transistors (see my hand drawn diagram).
Thanks for any input.
