On monday I dug out of my garage this Tron I've been holding onto. During the year or so that I've had the machine I managed to end up with 4 power supply boards. Since I only needed one I sold three of the others. They were all sold to me working with Bob Robert kits and Lithium batteries installed.
Now that I'm down to one supply I cant for the life of me get the +5 to come up correctly. With or without a load I only get +3.5 or so. The VR makes no difference in voltage and the board already had a Bob Roberts rebuild kit installed. I've gone over the traces in the +5 section numerous times and cant see anything wrong. I've swapped transistors with the +12 section and the problem stayed in the +5 section.
This very same machine worked fine with the other three supplies so I know that my problem is within the power supply board.
Anyone have any experience with this sort of thing? I really dont want to have to install a switcher so I have a friend sending me another board. That said I hate to be stumped by a stupid power supply board.
Thanks guys!
Matt
Now that I'm down to one supply I cant for the life of me get the +5 to come up correctly. With or without a load I only get +3.5 or so. The VR makes no difference in voltage and the board already had a Bob Roberts rebuild kit installed. I've gone over the traces in the +5 section numerous times and cant see anything wrong. I've swapped transistors with the +12 section and the problem stayed in the +5 section.
This very same machine worked fine with the other three supplies so I know that my problem is within the power supply board.
Anyone have any experience with this sort of thing? I really dont want to have to install a switcher so I have a friend sending me another board. That said I hate to be stumped by a stupid power supply board.
Thanks guys!
Matt
