Hello: I have 2 questions, Are Lionel Radio boards 691- R2LC-2 All the same?
I have a Lionel Postwar Celebration series Berkshire #631757 does not run I was told the radio board smokes. when I looked at the engine I noticed the heat sink holding the motor driver did not have any insulators separating the board from the heat sink. I worked on a scale Hudson earlier this year and it had insulators separating the 2 when I checked the schematics for the Berkshire 610 1130001 It didn't show insulators. Is there a reason for no insulators or did someone take the engine apart and overlooked the insulators on reassembly? I would appreciate some feedback on this issue before I install a new radio board.