AFM switch issue

[Dave Bishop]

I have an issue with AFM switches..

when ‘T’ in Martian (switch 33) is pressed, it triggers switch 43 -trough opto 2.. all others are fine..

common wire is White/Orange.. but cannot see where I’ve gone wrong, can see anything immediately wrong. Put a meter on the diode on the target and it reads 5.6.. reverse the probes and it reads 1 (display reads one anyway) so I take that as being 0 and OK.

 

[Dave Bishop]

I’ve done a lot of cleaning parts, taken stuff off and polished it.. ( cleaned trough boards and then used IPA to get rid of water.. that stuff was working fine...

 

[Pick Holder]

Backwards diode?
Wires crossed ?
Something shorting
It could be on another switch on the same row/column

 

[Dave Bishop]

Hey Pick..

So, looked at all the switches on same line.Bottom jet was stuck closed - sorted that..

Ball trough 3 wasn’t registering- I pushed the LED and It aligned and came back- but still it persists.

looked at Marvin's guide looked at the 4 switches in a “Square“ 2 are unused..

Turned game off and looked tested diode on switch that’s all good

 

[Dave Bishop]

Problem resolved

Both green targets on the ‘T’ and “I” had wires soldiered to the banded end of the diode..

The “T”made the Trough Opto 2 activate and the “I” made the bottom jet activate..