Hi all , Missing sound fix .
My Gangbusters was missing one sound , which was the robber sound , i though it was one of the MFC 80-40's on the pre amp board, that had blown .
I tested for voltage on the pre amp connector , and the 'Robber' voltage was not their.
Turns out it was a blown 555 timer chip on the Amp board , I installed 2 sockets and 2 new 555 chips, , thought i would just replace both. game sounds are now fully working . Yes!!
I recommend putting new sockets in for the LM 354's also on the Amp board , because the original type are not great , This worked on mine. getting the Machine gun sound going again , as it was intermittent..