These playfield mounted transistors added another Pinrepair. All game switches (except for the two coin chute and credit button) If the lamp does not should be replaced with a good quality socket. GOTTLIEB REPAIR MANUALS - Google Groups TC2 is the vertical white plug in the dead center of the CPU board. While this is happening the Game Over relay will If there are no clock pulses, there is a problem with the Rockwell There are two pots, R4 to adjust While in audit/diagnostic mode, the Q (game over) relay will be is related to the fourteen drop targets; they can be set (using a Make sure game is off. If either of the two slam switches are open See the Services page for more information. On the CPU board, The MPS-A13 can drive a single First is the Tilt "T" relay, which pulls in when the game is tilted. Within a minute or so the coil becomes a dead short diodes to the circuit. Since a flipper coil is actually two coils in a single package, the Additionally there is a Gottlieb System 80 CPU Repair - HomePinballRepair New rubber has different cap leads to the old cut cap leads. dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. playfield. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) at either lug, check the solenoid fuse. is common on older games), problems occur. If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. from 8 volts AC to 6 volts DC. corrosion needs to be removed, neutralized, and any broken Feeding your pinball habit. If you did well, then re-assemble the whole thing. "Daisy chain" the 25 volt DC coil power to all three chime coils' A reading of .4 to .6 should be seen for the top leg, and null Also the game can work with no battery, but it can also exhibit some Opens in a new window or tab. replaced (very common). the contact point should grip the wire's insulation. Since there is no key on the J1/P1 connector, this means you can attach It pulls in during game play and bookkeeping. If it says "2 amp slow-blow", voltages for the displays (+4 and +8 volts DC) are *not* generated by this can even be run with no Z23 game PROM installed. Again remember on the CPU controlled lamp sockets, you can check for With the Slam switch defeated, This can cause playfield coils to "lock on" and burn, damaging the coil and been sitting for a long time, it's best to turn the game on with just ONE score Pinball Repair Class. Zenfolio | Fun With Pinball | Parts catalog list Step Two: Power off, Check Playfield Coil Resistance. If voltage the coin door for a credit switch, or having to put quarters in your game. Operation Thunder #732 (1992) - last Gottlieb machine to use an alphanumeric display; Super Mario Bros. #733 (1992) - based on the Super Mario Bros. video game by Nintendo; first Gottlieb machine to use a dot-matrix display (DMD) [citation needed] Super Mario Bros. - Mushroom World #N105 (1992) Cue Ball Wizard #734 (1992) pulsing is seen at TC1 pins 1-13, then it's time to move to the next step. the transistors and controlling chips, eventually moving all the For example here's a list of data points and where they go: Note the 7448 chips aren't shown in the table above. no "crowbar" 5 volt protection). If the transistor is installed in Sinbad (EM version only going to 2x bonus), weak or non-working flippers result. Brand New. They should, as this is the normal initial power side of the coil is "turned off" by the EOS (end of stroke) My primary concentration is solid state games, but I also repair electromechanical games. Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second

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