Hi all,
I have a small auto-pilot on my trolling motor and it stopped working last week. It would do everything except turn to port (left). I looked at the circuit board and Q9 transistor was totally fried (I wish I had taken a picture of it). I guessed that the transistor was an N-channel and ordered an IRFZ40 to replace it (decided on this based on the MOSFET driver that was near it on the circuit board MIC5016WM).
I started to replace the transistor this morning and realized that the pad for the Source leg, was completely missing (blown away!!!), so I took some pictures and need a hail Mary pass in the endzone for me to fix this circuit and figure out where I need to connect this leg.
Here are some pics of the board. I tried to re-attach the leg to a very small patch of copper that was attached to the pad (I found the missing pad) that can be seen near the crater that was missing in the board.
The transistors are isolated with small plastic bushings, except the transistor that melted, also melted the bushings on it's mounting bolt, so I mounted it using silicone. The plugs just to the left of the MOSFETS (labelled ORANGE and BLACK), drive the small hydraulic pump that turns the motor.
Thanks for any and all help, I now it's a long shot, but there has been no support for this board for several years and I haven't been able to find a replacement.
Don "AJ" Peacock
I have a small auto-pilot on my trolling motor and it stopped working last week. It would do everything except turn to port (left). I looked at the circuit board and Q9 transistor was totally fried (I wish I had taken a picture of it). I guessed that the transistor was an N-channel and ordered an IRFZ40 to replace it (decided on this based on the MOSFET driver that was near it on the circuit board MIC5016WM).
I started to replace the transistor this morning and realized that the pad for the Source leg, was completely missing (blown away!!!), so I took some pictures and need a hail Mary pass in the endzone for me to fix this circuit and figure out where I need to connect this leg.
Here are some pics of the board. I tried to re-attach the leg to a very small patch of copper that was attached to the pad (I found the missing pad) that can be seen near the crater that was missing in the board.
The transistors are isolated with small plastic bushings, except the transistor that melted, also melted the bushings on it's mounting bolt, so I mounted it using silicone. The plugs just to the left of the MOSFETS (labelled ORANGE and BLACK), drive the small hydraulic pump that turns the motor.
Thanks for any and all help, I now it's a long shot, but there has been no support for this board for several years and I haven't been able to find a replacement.
Don "AJ" Peacock