JRWR

Hi all

I recently bought a faulty QPS Captain Cash fruit machine - MUX ROW ERR 31. I have the manual and the circuit diagrams of the Scorpion 4 board but was't able to fault find to component level so another £15 (on top of the £15 for the machine) for a new MPU meant I was able to clear that fault.

My problem now is that I can't get the machine to accept any coins - everything I put in comes straight out. I am a complete newbie with fruit machine so do I need to do something with the refill key? The hopper key? Reset something 'cos I've put a new MPU in? Tinker with wires?

I've no idea if this machine took coins before I bought it and some of the connections to the coin input mechanism did seem dodgy but even after checking them the machine isn't for playing. There is a sort of plug with purple wires one side and yellow the other - does anyone know what that does? (Picture attached.)

Thanks in advance for any help people might be able to give.

Cheers,
JRWR