ice cube, i finally got one of the golden motor controllers to work on, it was the 48V1000W with regen, pcb revision 4/08. withthe black relay in the corner for the LVC.
this is in another thread, for the controller problem, it burns up the zeners they added for the regen function problems:
but he gave me another goldenmotor controller, for 36V with the shenzen type controller board. with the LVC resistor bridge on the outside of the board.
you can see the trace from the input battery voltage running across the edge of the pcb to the LVC bridge in this picture:
can you take some pictures of your board and paste them on the regen controller problem thread?
you were correct that the trace you rebuilt went across the edge, but there was never anything but a trace there.
make sure the resistor on the right doesn't make contact with the trace, that resistor is the input to the first voltage regulator and is at a different voltage level.
at the time it shorted, it may have damaged the resistors to the right in the resistor bridge, which you can check with a voltmeter and a magnifying glass. possibly the op amp which takes the input from that bridge is damaged, which may account for your intermittent problems.
>>edit added, after thinking about this i doubt if it could have damaged it if the power trace shorted at that spot, since the bridge is already sitting on the battery voltage.<<
now that i got a controller to look at, i suspect we can fix yours too.
does yours have the zeners on the bottom too? would appreciate pictures over there if possible, thanks, dm