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So, by now i've got the machine close to 100% working, and the gameplay is flawless
Resoldered the connections on the credit unit to my best knowledge and most things are functioning like they should.
Left Flipperbutton switches game on,Gi works,middle and right coinchuteswitches produce credits on the wheel,credit light comes on.(i did not yet tinker with freeplay on the two creditunitswitches),Game over lite is on,ball in play lites are off,number of players is still on at last gamemode.
After having credits on the wheel, pushing startbutton starts 1 player game,3 or5 ball depending on setting,game works perfectly, cycles throug all player up and ballnr count lites.
Now the problem; i can not get the machine to start 2-4 player games in the normal way by pressing or holding startbutton!
This i can only acieve by repeatedly briefly connecting two loose wires which should be attached to the left coinchuteswitch,these wires where previously jumpwired to the startbutton.
By this manner it is possible to make the machine react in normal multiplayer way,that is, number of player lites shift from 1 to 4 and game proceeds normal.No credits visiblecredits are added in this way but maybe are instantly deducted.
The strange thing is, after i had the "adjust 25ct plug" in 6 position,this was no longer applicable,briefly connecting the wires then caused rapid giant leaps on the creditwheelcount so that in 3 steps the maximum of 17 credits was acieved but no multiplayergame was able. So i put the jumper back to its original position.
The final minor thing is what bothers me is, althoug there is a switch on the creditunit which activates knocker when pressed manually, it does not knock when "add credit solenoid" is activated by coinswitch,does this have anything to do with the speed the switch is operated?
And though Matchswitch is set on, i've never ever heard knocker ingame.