Playfield from switch matrix problems that are on the CPU. This can help isolate switch matrix problems that are on the Alternately, if you pull CN10 / CN11 youĬan use a jumper wire between pins on Cn10 and Cn11 to "close" each
ZACCARIA PINBALL MACHINE PARTS MANUAL
Test 2 : Switch Matrix : Use the the manual "Contact Arrangement" pageĪnd verify that each switch, when closed, reports the correct number,Īnd _only_ the correct number. Use the Advance switch on the coin door to get When the matrix is disconnected, that points us toward a switch matrix Playfield, then we can reasonably guess that it's not because there isĪ problem with the switch matrix. With the switch matrix disconnected, if it's still doing anything on the What happens if you disconnect CN10 / CN11 from the CPU? These are the You're still having trouble with this game? Wow. > Game starts and seems to be working fine except for random coils and mechanisms flickering on and off during gameplay and attract mode. > Does anyone out there have any idea what could be causing this: Once I stick it back in the game all hell breaks loose.ĭoes anyone have any idea what's up with this damn thing? I'm too stupid to get out a logic probe and oscilloscope- wouldn't have the first clue what to do or look for. David Gersic has tested the CPU board now three times and everything seems to check out fine. Then the fuse blows and pop bumpers and other cpu controlled coils stop working.Ĭertain switches and coils (left slingshot, right upper playfield ball gate and right & left outlane flippers & switches don't respond) Drop target release coils erratically energize at any time like it's having a seizure. Motorcyclist starts running erratically on and off for no reason. Game starts and seems to be working fine except for random coils and mechanisms flickering on and off during gameplay and attract mode.īall trough will randomly shoot a ball out to the shooter lane during attract mode. Does anyone out there have any idea what could be causing this:
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