TOTAN switch matrix issues

[newdos]

Hi Guys,

Typical - day before blackpool my TOTAN decided it's gonna lose a row of switches. Can someone confirm if I have lost a whole row ie row 8 (pin 9 on J208) that it must be down to the LM339 in U16 (assuming there are no wiring issues to that row)

Even worse snapped a bloody pin off when re-seated a connector and the pin got stuck up my finger nail Aargh!!!

Cheers

kev

 

[chris b]

Make sure you disconnect all the switch conectors from the cpu then you can isolate it and you know the fault is on the cpu and not on the playfield