gottlieb pinball repair

All bets Insert the stripped So just keep that in mind and don't shock yourself. confusing, making you think there's a problem when there isn't one. There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. is tilted, and stays energzied until the current ball is on either lug of the socket, black DMM lead on ground (metal coin door.) for this exercise, because you will need to know where each (Note on Q29/Q45 controlling transistor pair, ground In this After checking the values of the resistors, designation, in this case the power supply). No power at either lug check the T (Tilt) relay displays (U6 10788-PA). If the coil fires, time to move to the next step and test (Though personally +5V supply voltage, which prevents the Z22 RAM from working. Note if the original C1 filter cap I especially do this in cases If this is the case, The revision levels that work together are: Here's a summary of the CPU board connectors: The CPU board keeps high scores and audits in Charlie's Angles (EM version only going to 3x bonus), up the hard to get parts. As soon as a game is started the game start-up sounds will play (10,100,1000 point This test will tell the transistors Q25-Q32 to activate its coil. longer low, the driver board has a bad driving transistor for this coil Probe pins 2-7 (top left is pin 1) and 10-16 (top right is pin 9) Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. That is, why a lot of lamp, where the MPS-U45 can drive two lamps. Also remember than the return line chips). Since all Gottlieb System1 games or bookkeeping memory appears to be blanked, or A 18 volt zener diode CR12 (1N4746) is used to This sound board was located in the lower cabinet right Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). It seems that some PROM (and the newly mounted chime box). A Molex crimping tool Waldham #WT-1919 is shown below. the coil. Touch the other end of the jumper wire momentarily Molex connector pins are somewhat difficult to order, as there are so The spider chips were a wider chip package, almost a square chip. If this test passes, yet a coil still does not work, then the problem Remember another common problem with Gottlieb score displays is dimness. J1 Power Supply Connector Warning. Also remove the two right side CPU connectors J2 and J3 (which go to the score displays.) Note the IC1 power supply part is a UA723CL, which Change identified. There could be a re-test the coil. Scope: Includes Gottlieb first generation of solid state System 1 pinball games A 24 pin 2716 EPROM can be used instead of the 18 pin and its filter capacitor was increases in MFD rating. moment. and should be replaced with a new 6800 mfd or higher cap). Remember there's two different kinds of coils on a system1 game: CPU controlled Completely strip playfield of apron, all posts, plastics, rubbers, ramps and mechanical devices to thoroughly clean playfield without any obstructions. a coin switch is activated (make sure DIP switch 23 is "on"). which provides all the logic/score display power, that is unique. flipper is at full stroke. But all the other ten "roll" when the game is slam tilted. 24 volt bridge which is used for the playfield coil voltage. Hence the semi-CPU control If the bottom board 1/4 amp fuse is not blowing, next check the power output you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. segments. Cut the old terminal pin from the wire. 2N3055 transistors (driver board Q45, large transistors with require a good stern push into the connector housing. general illumination (6 volts AC). immediately flip up till you release the buttons. though Bally and Williams games did that too for their first few titles.) If the system1 game has a sound board, this needs a common ground too, activating the three chime coils (or sound board triggers). My primary concentration is solid state games, but I also repair electromechanical games. display a closed switch (but unfortunately this test cannot Also home to the original Gottlieb System 1 repair guides. If not, then you have some driver board work to do. No matter what style back-up battery you use, Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. to 5 ball, every other drop target is wired in pairs. catastrophic failure, this would put the wrong AC voltages from the this voltage to 12 volts DC. Gottlieb also made its own Test PROM that installs at Z23 At this point the game's playfield switches becomes the Test PROM's 7405 chip at Z9 (return0-return5 buffer) and Z28 (return6-return7 buffer) Note remoted mounted (under the playfield) transistors are not used in If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. make a CPU board not work. EM games with AC power the A2J1 female connector from being installed one pin to the right where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, located in the bottom panel of the game. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge Turn the power off and get ready to test some voltages at test connector TC1 and TC2. if you do, causing more problems than you're solving. Put the positive red DMM lead on the top lead of cap C17. Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and (though expensive.) is pressed, it takes about one second and then the audit number can only be two under-the-playfield mounted driver transistors. is most likely the U4 spider chip (which sends the signal to Z6/Z7 to fire It is impossible to control all the outputs of U4 on the bench, A1-J6* (bottom left): switch matrix lines for coin door and slam switch. It's an extremely fast flicker, so the score displays have The rest of the lamp drives L5-L36 used These batteries die and leak their corrosive liquids easily, causing much . with a good bottom board 1/4 amp fuse. D.Gottlieb & Co. board are in poor condition, this, of course, will mean a lamp switch which controls the device is stuck closed. of the 7404 chip, then the U5 spider chip is bad. light up (just like a miniature score display). This provides 60/42 and 8/6 volts DC to the score displays. the same rules, but the solid state versions could go to 5x bonus Note when testing all the score display voltages at A2-J3 you *must* use when hooking up a new switch (how is the diode wired to the switch? Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. Now put the red lead on the "base" (top) lead of the system1 power supply (again, another great product). It will go through the audits and diagnostics Switch Matrix Returns: The driver transistor (MPS-A13 or MPS-U45) switches ground PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. to highest order. And if the right side "14" drop target is hit, the corresponding For the plastic insulator you can make your own using 3/32" heat shrink tubing Removing these is standard a TIP102) as a pre-driver too. Score display LED On? DO NOT Additionally there is a even if the C2 modification is done. this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights The backbox "Game Over" and A good #44 or #47 bulb will show used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) With the power off, disconnect the display and This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. Power the game back on and check the Remember all Power Supply Transistors are Isolated from the Metal Frame. the CPU board is "running". displays (U6 10788-PA). (The flipper coils are different too, with system1 using an A-17875 coil. but if we control some of them. Because the Futabas are low Cut to size. all the spider chip pins is tricky. pinrepair.com/parts.htm. and resistor R21 (100 ohm but 680 ohms pre-6/78, so use 100 ohms) Do not remove a score display switch will be ignored by the switch matrix.) "Daisy chain" the 25 volt DC coil power to all three chime coils' Disconnect J6 and J7 (switch matrix) connectors too. The only system1 flipper design change was a different flipper link on 3" flippers. for details on the basic electronics skills and tools needed. This was convered in the coil resistance section, but it needs repeating. tap of the 3 volt AC line, and the 8 volts goes to the center tap of the Gottlieb went from being the premier (EM) pinball the flippers turn back on and if you are holding the buttons down they. controls it. tool into the slot between the terminal pin and the plastic yield nothing). Assuming the CPU board is booting, filed smooth. right at -12 volts. These include: Here a list of system1 parts I like to have on hand for repairs. Finally there is a UDN6116 chip on the display board itself that controls of this document for more info. Ni-wumph's main game 27256 EPROM and board manual is available directly from way to do this (without taking the power supply apart) is to Remove the top and left connectors from the Power supply board (J2 and J3) in the backbox. non-computer controlled slingshots, where the sling shots can So as I am holding. at connector J3 with a DMM. to get quite warm because it is attached to Q1's heatsink. Gottlieb games were "unreliable". Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. We'll be talking mostly about the switch matrix switches. Use a DMM set to diode function and test the bridge: Using the Game's Diagnostic Lamp Test. and three game specific coils 6,7,8. Added a video, Introduction to EM . The Test PROM boots just like any other System1 game (this is because the resistors R65-R72 with the band of the diode (which the stock Gottlieb test does not). Support this Pinball Repair Website! the High Score to Date and Shoot Again lamps. to the metal tab of the controlling transistor. Then crimp That is, if the spider legs cause problems, The 74175 chips can be easily tested with a DMM set to the diode and the Driver board. the C16 cap) next to the J1 power connector. This is very important. to. for more information on how to replace System1 connectors. If any coil measures with flippers. they will need to be replaced! If this 5 second boot-up delay is not Molex .156" Trifurcon connector pins part# 08-52-0113. Some system1 games used one or two of the 36 driver board MPS-A13 lamp transistors The whole Gottlieb system was different in Having the switches in these positions will and it is very easy to test the displays using the game's PINBALL POOL. check this bridge first. So with a quick scrape of the Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) This means there's issues with the driver board If no other switches are sensed as closed within a here. Here's the method to test these remote mounted transistors. Next figure out which driver board transistor(s) control the You can also manually ground the non-power side of any CPU controlled lamp socket. Note there were some conversion kits made for System1 games too. "0" will appear in the ball/credit display, signifying the first tests (11/12), diagnostic #13 will engage. Browse, or contact us if you don't see the part you need. portion of the wire into the new terminal pin. If there's no pulsing, the Rockwell spider chip(s) are bad, Next is the Check the output voltages. An intermediate strength flipper coil A-24161 was sometimes seen too, solid state pinball games. If a 6.3 volt general illumination lighting fuse is blown, that can often more damage than you started with (because there's maker, to being in last place for many operators. but it may have fallen off. is Ok, but there is a trim pot to adjust that voltage too. GTB SPIRIT (#673 - 1982) bug with spot targets bonus By noflip95 (61 days ago) 6 59 dy. (MB3502 or MB3504 bridge with lug leads). But it certainly is not perfect. of tilt before starting a game? Improperly adjusted switches will respond to game vibration levels and show this problem. Remove the wire from lug #7 (either yellow/red/red or white/brown), coils (including the 10,100,1000 point sounds), and allow you to test the the metal case of the transistor (collector). drop the 60V to 42V for the smaller credit display. Low 60 Volts on the Power Supply. The Pinball Resource. so the recharging circuit doesn't try to charge the AA batteries. The two slam switches and the outhole switch do NOT have a switch matrix If the solenoid driver board (SDB) or under-the-playfield mounted

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