Quoted from rolf_martin_062:Look at Your Player-Unit - see wire-91-2-Gray-Red (for Player-1) soldered-on (?), see wire-56-2-White-Brown (for Player-2) soldered-on (?), see wire-53-2-White-Yellow (for Player-3) soldered-on (?), see wire-75-8-Orange-White (for Player-4) soldered-on (?) TRUELY soldered-on ? Look-out on the Coin-Unit for this wire-color-75-8-Orange-White soldered-on - TRUELY soldered-on ? Look out on the swiches on the Ball-Return-Relay for this wire-color-75-8-Orange-White soldered-on - TRUELY soldered-on ? See in the JPG my red question marks - in some way these three places are connected with this wire-color-75-8-Orange-White soldered-on - (TRUELY soldered-on ?)
rolf,
Thank you so much for your analysis. Between you & HowardR's links, I'm getting better at understanding using jumpers to troubleshoot. So I started looking at all the areas you suggested checking solder connections. Then started the pin and the player reset wasn't working at all, going trough all players on ball 1 then doing nothing after player 4. So I started using jumpers on the wires you suggested starting from the player up unit, then the coin unit and so on with no luck. Then finally from the blue orange wire on the shoot again relay to the orange red wire on the SCM 1G, I found the fault. Then I remembered I cleaned and adjusted that switch, but apparently made it worse. So I adjusted it again and got it back working but still had the fault after a few games. Now I adjusted it very tight, maybe switch is bad, but I played some games without a fault. I will need to play a lot games to see if this was the problem from the start or if there's something else. I have recorded up to 14 games without a fault before so I will see how this goes. Also HowardR is giving me a call tomorrow so maybe he'll give me some more help with troubleshooting. I'll update with any progress.
Thanks again for all your help