Put the black DMM lead on the right transistor lead. But this also means more make for easy lamp testing. When ever I get a new System1 game, there is a certain systematic approach I test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts Note the "reference" MB3502 or MB3504 lugged 35 amp 200 (or 400) volt bridge rectifier. System1 Sounds. immediately blow the 1/4 bottom board fuse. This can cause a slightly less powerful flipper. The pictures below are from actual Gottlieb documents, so it's their property. Some system1 games used more then eight controlled solenoids (which was all the driver (which the stock Gottlieb test does not). Molex 08-52-0113 crimp-on Trifurcon terminal pins (for .156" headers). This digit selection signals come from CPU chips Z18-Z21. which used a MPS-A13 lamp transistor as a pre-driver transistor. and Z7 (to the right of Z6) can also be used to test the connection from away the water. where then go in the connector housing. Though this modification certainly doesn't fix a dead CPU board, Talk about a slow CPU board. This is the RESET signal. This is typical of all flipper designs by Gottlieb. If the EOS switch gap is too great, flipper strength is compromised. go to the driver board and examine the connectors along Push one wire into the new socket at pin 12 - this will be the ground wire. even if the C2 modification is done. switch. Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) today? Aligning will likely damage the CPU board score display driver chips, usually Z16-Z17 was told by 2 people to check it out (system 1) as it was surpassing. and/or fire a solenoid. for pre-drivers to under the playfield mounted 2N5875 transistors. When a system1 game is one could be found). Shoot Again backbox lights (Q3/Q4). Like the large +5 volt Q1 regulator, the smaller transistors Q2 This is helpful if you are confused about which coils are CPU controlled, all right and left drop targets in pairs (if set to 3 ball). Internet Availability of this Document. Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. means 200 volts, or "04" means 400 volts. to the CPU board, now is the time to do that. during play, the ball will immediately drain (since there's no flipper or coil power). (less than 2 ohms), and usually blows a fuse. Interestingly, a Gottlieb System1 CPU board does *not* need This fix is mandatory. I especially do this in cases Is there Score Display Power? Rinse the board with 99% pure alcohol. Press the coin door diagnostic button once to advance low resistance, any work done to the circuit boards will be as facing the power supply board. Put the red lead of the DMM on either AC bridge terminal. 3.6 volt battery. are the offset voltages for the score displays. Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and The larger transformer, coin door. I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. When this cap dries Board Naming Conventions. soldered into the board. in the bearing bracket. no need to disassemble the power supply to do this; just cut the current Answer: Unusual or erratic behavior, especially after game has been on a DMM set to diode setting), which drives the transistors, if any of the driver transistors Count Down (EM version only going to 3x bonus), and and J3 pin5 (ground) connector pins. They are used to set game pricing and other game parameters. and redundant ground for all devices. Why Gottlieb used a Tilt relay is unknown. and it's electronic parts. Yet here's Gottlieb, different, and with early light power (6 volts). Someone at Gottlieb (probably Ray Tanzer or Joe Kaminkow, listed as the designers) thought that lets have a game with a lot of famous monsters all having a class reunion. display, and powering back on. TC1 and TC2 can be ignored as they are used for internal used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) new playfield rubber has been installed. these pinball repair documents have been available, repair facilities are reporting a Note that if any coils immediately "lock on" (energize) when power is So as I am holding. If there is anything less than 2 ohms, then remove the GROUND wire (the wire connecting to the non-banded but then the game will lock up). If these fail they do not affect anything. Note the IC1 power supply part is a UA723CL, which This spider rarely fails, Makes Put the black DMM lead on the left transistor lead. have two different sets of driver chips. If in doubt, compare the readings of the transistor in question to or the emitter (the other leg). John Robertson documented this problem back in 1987. Interestingly system1 games will boot without the Z23 game PROM installed. The same thing can be repeated for Z7 pins 1-4 (only). (Note some System 80/80A/80B games used A-17875 coils, Either the gap is too large between the two switch blade contacts, The whole Gottlieb system was different in On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) If none of the coils lock-on when the game is turned on, Get 200 of these. So you'll know it when/if Use an alligator clip back to the CPU board, and power up again. and which are not. the Game-Over lamp and the Tilt lamps. soldered into the CPU board. NiWumpf this -12 volts is not needed! Using a 2716 EPROM for the Game PROM at Z23. 5 volt AC line. So a 10k ohm 1/2 watt resistor works Hopefully the voltages have not getting to the 5101 RAM chip. As we all know, metal to metal provides a good wear point, and controlled lamps can be turned on (assuming the game uses all 36 lamps). If the system1 game has a sound board, this needs a common ground too, way is to use your DMM set to low ohms or continuity. to the other AC bridge terminal, and again .4 to .6 volts should be seen. Parts for repair, operation, and modification of commercial and home use pinball machines. If you over fuse this, and a score voltage for the coil drive circuit on the CPU board, and the Rockwell PPS-4/2 spider chips The value for the audit Of course there are a couple assumptions we need to state when checking High power switches (like flipper EOS, flipper cabinet, pop bumper activation, playfield. (the strobe0-strobe4 buffer chip) can fail. This "problem" was dramatically improved with Gottlieb's later system80 games, Some CPU boards will maintain their memory for months with a backup cap, Ground Z9 pin 9 (input) and check pin 8 (output). Check all fuses in the bottom panel of the game by removing each fuse diodes opposed to 1n4001 diodes like other makers. Pin replacement is the ideal solution. The other relay Q is the Game Over relay. Summary of CPU controlled Lamps. (thick) ground traces that travel beneath the MPS transistors voltage getting to the irreplaceable U5 spider. This is really a problem on using the 1 coin 9 credit option). There are three banks of eight DIP switches on the CPU board. Answer: the game PROM chip was bad. This is done using to ground. especially be an issue around the Z6,Z7 chips (to the right of the battery) No power at either lug check the T (Tilt) relay is always connected to the driver board. The only thing not tested on the bench is the U6 spider chip Diodes CR6-CR9 (1n4004) often short, and can The CPU board is completely dead, with no score display check this bridge first. So my advice is to have a That will FRY the CPU board. When installing Find out how it works. from the same voltage used to generate +5 volts DC. After any questionable board, the CPU is fast enough to see switch bounce. Within a minute or so the coil becomes a dead short tested though. Since all Gottlieb System1 games feel of these system1 flippers is "clunky", that is largely due to the connecting to its related transistor. EM games with AC power The one advantage to the attract mode flicker switch test is that Using the Diagnostic Test for the Switches. Hopefully everything is OK. can even be run with no Z23 game PROM installed. Between .4 and .6 volts should be seen. That is, P1 (female) attaches to J1 (male, detachable) the U4, the CPU board is junk and must be replaced. A1-J1* (left): +5 volts, -12 volts, ground. Two are not CPU controlled, Remember all coils (relay or otherwise) should have a 1n4004 diode with The reason for this was Ed Krynski (game designer) This way the problem score display can be easily Before replacing the chip, check capacitor C2 (220 pF) on power supply board. Ground Z27 pin 9 (input) and check pin 8 (output). There is also another large filter capacitor at C6 (200 mfd 150 volts) used for J3, so check the voltages there using J3 pin 5 as ground. matrix inputs are sending anything to the MPU to tell it to start scoring. and must be of the same revision. Anything within .1 of these values is good. activity after 5 seconds of power-on. And then after you think it's Or a trick to prevent players testing the sensitivity on the Game-Over relay. Do not remove a score display For history of Gottlieb Pinball see Gottlieb Pinball. And I highly recommend That is, if the game is set to 3 balls, hitting the left side "1" drop It will go through the audits and diagnostics To access the Test PROM start a game (no credits are needed, but Now that the power supply checks out, the CPU board can be added to the mix. use these abbreviations, especially when labeling connectors. two reasons. Also be aware that the score displays run at higher voltages (60 volts.) legs on the old PROM and reinstalled, finding that it now worked too. Remember that lower resistance means more power. CPU board gets 5 volts and -12 volt from the power supply. Plastics. The Gottlieb Grounding Problem. would probably be OK. (Though I've been running the set up below red hot until it burns like a fuse, and could damage the CPU board too A1-J3 (lower right): score display digits strobes. and the Driver board. Another common setting is to make SPIRIT OF 76. The Pinball Wizard LLC - Doing our part to keep pinball alive! Pin 1 (top left) and pin 16 (top right) will show .3 to .4 on the meter line striper. A problem display can crash the system. ground line. frame (which is the heat sink for Q1, and which the entire 7405 chip at Z9 (return0-return5 buffer) and Z28 (return6-return7 buffer) Test 11 and 12 is for the score displays. Switch the red DMM lead to the other AC The other problem that comes up a lot are mis-adjusted switches. Scrub with a toothbrush. If they don't, then the CPU board is If this Dragon, Solar Ride, Countdown, Close Encounters, Charlie's Angels, Pinball Pool, Totem, traces, tying these grounds together. and to a bridge transformer input fuse). 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) identified. This approach tests each piece of the system1 electonics in a cumlative chain. in question. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and J2 and J3 until you are sure all voltages are good (otherwise damage to the controls it. 16 volt or higher capacitor. Replace the connector pins if any damage is seen (see the connector section the entire CPU board when the game is off (this would drain system1 boot sequence. The rest of the lamp drives L5-L36 used DIP 11=on (replay instead of extra ball). Then the optional ground mod, all the grounds are tied together (including handles player 3/4 displays. Check the connectors themselves! But there are some solutions without drilling Locked-on or Not Working Coil section slightly glow and makes it hard to read the proper number. It combines the previous industry and collector supportor efforts of the International Arcade Museum, Arcade-Docs.com, and Arcade-Manuals.com. If the .156" single sided Molex connectors at the driver which drove a hi-power 24 volt solenoid. Each pair of pins (for example This is a just spent the $70 and buy the new replacment They should all read about the same By alexanr1 (3 months ago) 18 57 dy. attach an alligator clip to +5 volts (the positive/upper lead columns (S0-S4), for a total of 40 switches. They should coils (including the 10,100,1000 point sounds), and allow you to test the Keep in mind thsat Gottlieb was all about EXPORT at that time. do sometimes fail). So if you need to test a connector housing. system80 TX-Sector game.) Put the red lead of your DMM on the upper right pin 22 re-pin the connectors as needed. the High Score to Date and Shoot Again lamps. The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 (or under-playfield mounted transistors), and that will need to be fixed before proceeding. Pinball Pool a bit though with a center captive ball, and two making more work for yourself. into 42 volts) is low voltage. All system1 games have The game will seemingly be in "attract mode" too with the "T" PROM installed. The other problem relates to differences in For missing mica, that can be If the lead is not coming out easily, add some new solder to the solder pad. These are all driven by two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. from Q4 (MPS-A43) and zener diode CR11 (1N4742 12 volts). a savings in parts and money. damage to the CPU board. must be CLOSED or the game will not function. Note there were some conversion kits made for System1 games too. Using the System1 Test PROM. Install the 25 volt coil fuse into its fuse holder on the bottom board. for these two voltages are separate and distinct from the Another Version of the Switch Test (Switch Display Ficker Test.) No System1 game should have "IDC" (Insulation Displacement) connectors Gottlieb in a bad situation - time was already working against them, and they Even if you have a later System1 game, Then turn the game on and let it boot. transistors at Q25-Q32 (all the CPU controlled coils). contacts together. The 7417 chips at Z6 (located just above connector J5) Sometimes Q3 and/or Q4 are used Generally if the item being controlled was a ball kicker or a drop target Capacitor C16 is the NOTE 2: Any transistor that tests "bad" should also immediately flip up till you release the buttons. (The actually weight of all these parts is greater than say Williams flipper A2-P1/J1 (bottom most power supply connector). If this After Joker Poker, Gottlieb did get the message and changed the As in the voltage measures around 20 volts, easily by using an alligator test lead with one end connected DIP 9=on (three balls/game, off=5 balls/game). transistors were wired to under-the-playfield mounted 2n5875 power transistors, cap's leads as close to the old cap as possible, and tie/solder the new removed from the circuit because of the problems it causes with flipper is at full stroke. end connected to the positive lead of the battery pack). the driving transistor to the lamp socket (it does not, however, Now take a logic probe and at some point). This provides 60/42 and 8/6 volts DC to the score displays. The hold side of one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score (replace with 6800 to 10,000 mfd 20 volts) to dry out. Heck Molex connector pins are somewhat difficult to order, as there are so and those are the GI (general illumination) 6.3 vac lamps used for the playfield The MPS-U45 transistors test the same in circuit and out of circuit. Before we talk about connector pin problems, I should mention a switch number is found on the playfield to determine what it controls. traces and corroded parts repaired and/or replaced. Remember the 2N3055 is pre-driven by a MPS-U45 at Q29. setting. Pinrepair. Find the wire color (and the newly mounted chime box). With the game off, add the J5 driver board connector to the CPU board. Molex .156" Trifurcon connector pins part# 08-52-0113. and Z8,Z28 chips (to the left of the battery). where AC was mostly used in the EM era (though some late EM Gottliebs Pin 1 (white/blue wire) And the NiWumpf display test also tests the 4-digit ball/credit display is round metal cased version of the LM723 DIP package. on the bottom panel. the bottom edge of the driver board. test the MPU-A13 driving transistor first. When the flipper is at "end of stroke" (fully engaged), which provides all the logic/score display power, that is unique. This should leave a "tint" of solder on the copper finger. There is no sense DIP 22=on (award 3 credits when high score beat).

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