Hi All -

I am having a blow out the control fuse of a WP2300 walkie by Crown. At the same time the controller got damage I have changed two of them.
I opened a controller and I found melted the pcb trace between terminal A-2 and anode of the diode is connected at this terminal.

There are three ways after cathode one is coming to another cathode diode which I belive it is not flowing current becuase it has inverse polarization, the second one is goinf to +BV which is battery positive side thru main contactor and it is a deviation to the BRS in,. the third one is going to C-1 connector and is looped to the C-2.

Can anyone tell me where I can start in order to find out this problem?