I have a board that was acting up and I’ll check to see if it was updated with 2n3906 transistors.
Someone had replaced Q7 which is bad. I’m not sure if they used the correct part there. Can someone confirm what Q7 should be?
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I did find this schematic for the board:
https://archive.org/details/RottendogAmusementsFLP023Schematics
It shows different transistors than the ones that apparently should be on the board. At least it confirms that all three of the larger transistors should be the same.
Has anyone found another schematic?
3 months later
Quoted from Md2020:Hi all- want to report that I also have a RD FLP023 with q1 q2 q3 being 2n5401's. My board has a build date of Feb 2021.
I'm already out of commission due to my right flipper locking on when a game is started (Q7 is about to melt down). about to send an email out to have them ship me all new parts. Although, now I'm starting to wonder if I should just rebuild my OE board and get my money back for this RD. Starting to wish I'd found this thread first..
I think the new owners are aware of the issue on some of these and making sure they are are fixed going forward. They are also doing some updates to their website and posting schematics for their boards
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