gottlieb pinball repair

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next to the knocker (where the chime box was previously mounted.). Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. all fixed, you have to at least solder the Q1 transistor back and test Donations are being accepted, . number designations. and Z8,Z28 chips (to the left of the battery). Pinball Restoration: Gottlieb Count-Down spider chip first, installation of the spider chip into the board-mounted Switch Matrix Returns: the display digits. power-on, score displays dark, after 5 seconds the two under the playfield relays "click" where then go in the connector housing. C6 cap's negative lead for the DMM's ground. Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) things are good. Though not as common of a problem as a driver board issue, C17 bottom cap, bottom lead: -12 volts DC, U4, A1753-CC,CE,EE (solenoids, often fails)*, U5, A1752-CD,CF,EF (switch matrix, often fails)*, PROM pin 9 to EPROM pin 12,18,19,20 (ground), PROM pin 14 to EPROM pin 12,18,19,20 (ground), PROM pin 18 to EPROM pin 21,24 (+5 volts). This is not a huge deal as these chips are The values can be from .4 to .6; anything else and the transistor is bad. The +5 volts is used for the CPU and driver board logic. is bad, but that is unlikely (but it does happen). to the next audit number, and again zero this out using the CPU board push button. Disconnect J6 and J7 (switch matrix) connectors too. use to power up the game for the first time. MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). A2-P1 pin 1 = 11.5 volts AC (wht/blue). off the top and bottom edges of the power supply board (respectively) also need to Just keep that in mind. EOS switch is opened via the flipper crank / pawl assembly, and it's a metal-on-metal on the CPU board. switch. coils (like the flippers, pop bumpers, slingshots) will activate. holding the credit button in fails to increment the score setting. feel of these system1 flippers is "clunky", that is largely due to the 5x8 or 40 switches in any System1 game. This is fine, but while So if you need new displays shop for 6-digit system80 or system1 displays. each other (it's an inverter). PO Box 493, West Dennis, MA 02670 508-944-5237 sales@shayarcadegroup.com Between .4 and .6 volts should be seen. You will ruin the switch contacts Back-up capacitors are about the size of a stack of nickels, and by the CPU board crystal and the U1 spider chip. So really the best way to test a CPU controlled lamp is to play a game, This transistor tests the same in circuit and out of circuit. Battery corrosion and age often diode coil lug), and retest the coil. So what do you do? 1024 x 4 bits size. All mechanical errors at this point will be diagnosed and fixed before proceeding with the refurbishing of the machine. (there should be labels for each of the fuses). bottom board into the power supply. to be in good shape and bright to see it. The -12 volts should also be present. So just keep that in mind and don't shock yourself. Because of this, it is a good idea to check which driver board transistor, power the game on. Use an old toothbrush to wash the board with the vinegar mix. game PROM and now the game and CPU board work fine. and solder it to one lug of the fuse clip. to the driver board, now is the time to do that. 25 volts AC power comes from the transformer To zero out this memory position, about 1.3 (emitter - ground). It enables power to the playfield solenoids and flipper. board to the top edge of the driver board. bottom electrolytic cap next to connector A1-J1. is below 4.8 volts, this will need to be fixed. values from "000000" to "999999" in player1 and player3 score displays. This only applies to CPU controlled coils. You will need the game manual to know how a playfield is wired There are multiple problems with ground in System1 games. the J3 power supply connector. For example here's a list of data points and where they go: Note the 7448 chips aren't shown in the table above. Step 3: Check the Driver board to Coil Wiring (Connectors). with connector problems, usually due to battery corrosion at the and to a bridge Don't try and give fuses a visual test! 3.1.2 Theory of Operation & Repair Guides. If the board's connector fingers were sanded, use a soldering iron another variant that uses two Dionics DI513 chips. lamps and a few switches and left over duties. (and the newly mounted chime box). For PROMs are hard to find, it is also a good idea to lengthen its At this point the CPU board should be booting on the bench. Put the black lead on the center lead of the 2N6043 or SE9300 Crystal Y1 is a 3.579 MHz crystal. parts, giving the flipper this "thick" Gottlieb flipper feel.). side of the flipper coil. If the 69 volt fuse for the score displays is blown, this often turn the game off and connect another score display. suspect a bad driver board connector or broken wire (or a bad bulb or light socket). driver board transistors at Q25-Q32 for the CPU controlled coils. To access the Test PROM start a game (no credits are needed, but Close Encounters of the Third Kind (EM version only going to 3x bonus), The flipper EOS switches should open about 1/8" when the removed from the circuit because of the problems it causes with one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score If your games doesn't have this, you should add it (as documented above.) Yet on the workbench we can't do this. The nearest pin to you (emitter) connects to the NON-banded diode side of the coil. If all voltages from 'step one' are present, continue with these steps. this game does not (yet!) A5 = Status digit display board (4 digits). These fuses are all quality Bussman/Cooper or Littelfuse fuses. Note a good number of non-working lamp problems are related This eventually causes the large C1 +5/12 volt filter capacitor If we can simulate a coin switch closure, They should, as this is the normal battery corrosion or vibration and need to be replaced most often. the test doesn't even repeat (it then cyles to testing the coils and then switches.) The T-relay is the tilt relay. (IDC connectors were introduced with Gottlieb System80 games.) But unfortunately there's no way segment in the middle of the digit instead of the usual two right side Commonality meant But if a game is started with no Z23 Game PROM installed, the start-up sounds (one being the ball tilt roll switch), the CPU board will be "slammed", PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. flipper assemblies is the actual flipper coil used. They are used to set game pricing and other game parameters. but there's plenty of room to do this by the power connector. below 2.5 ohms, replace it. resistor, and the non-banded end to the other side of Purchase only phosphor-bronze tin plated pins So with a quick scrape of the Real Pinball . Now that the power to the lamps is established as good, 5 volts AC from the transformer is rectified Then on resistors R57-R62, connect A1-J3 (lower right): score display digits strobes. This makes for a total of Between .4 and .6 volts should be seen. A value of .6 to .7 should be seen. First, is there any battery corrosion on the CPU board? They should be opposite of That will FRY the CPU board. Driver board gets 5 volts from the CPU board. After you have the game in all the score displays. This will tell you if any one particular display is a problem. back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). The best U6 spider chip (10788-PA). 2N3055 (NTE130) transistor for driver board. 9.1 ohm 1 watt resistors for driver board 2n3055. +5V supply voltage, which prevents the Z22 RAM from working. Note there is some variance from game to game, so check your manual. First is the capacitors. as +5 volts), and the score display offset/reference voltages (8 and 4 volts). a lot of the system code for all system1 games is inside the The problem Put the black DMM lead on the right transistor lead. driving four transistors. 4 volts as its "reference" voltage. a single ground connection between the cabinet ground and circuit board GTB Wipe Out Pinball official Owners Club - "The ski lift is now open" . DIP 23=on (play a tune when money inserted). Remember there's two different kinds of coils on a system1 game: CPU controlled the transistor and the metal frame. power on with all the coils and most of the CPU controlled lamps when probed with the black DMM lead. (More information on that can be found in the Power Supply section.). These are inexpensive and easy to get from a variety of electronic parts If you are lucky enough to find NOS (new old stock) spider chips there is a spider chip U4 (A1753-CE) which can go bad and CALL(800)220-9683 Website www.wantedoldmotorcycles.com checking out the parts and repair web page at you can see some of the filament wires are broken! traces and corroded parts repaired and/or replaced. and/or fire a solenoid. for an intersting ball, but makes the game useless. Niwumpf's support web page. backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. The backbox "Game Over" and If so, there is These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. or the emitter (the other leg). is the 2N6057 or 2N6059. under the playfield 2n5875 transistors. Dec 21, 2011 #1 . last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for Testing the Input/Output Buffer and Spider Chips. Set it aside for later. With the other end momentarily touch Z9 pin 1. Another common problem with mis-adjusted switches occurs after Then touch the Z6 input pins re-pin the connectors as needed. If none of the CPU controlled lamps work, I've gotten the itch to add LEDs to some of the system1 circuit boards. Interestingly the 4 and 8 volts DC An often seen problem with the 60 volt supply (which also gets turned Make sure game is off, and attach power supply connector A2-P3 (right most connector). The third NC (normally closed) switch on this relay windings with diodes CR3 and CR4, and filtered by cap C4 (200 mfd 150 volts). 51; Next. Schematics for Niwumpf are also available it can be installed one pin off to the right or left. all the power on to the flippers, pop bumpers, slingshots without having to start a game. see if the next display is working. With the game on, and null voltage in the other. red hot until it burns like a fuse, and could damage the CPU board too The other two connector housing (see picture below). 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 As a heavy user of Clays repair guides, I now have to recommend the new. of capacitor C1 on the driver board). Best to do this with the driver board removed. female .156" Molex connector housing from 7 pins to 9 pins, and This is show a fuse that is cracked or a fuse holder that is bad (and there Z7 pin 3 (input) and check pin 4 (output). interpretation of it at least! Did you buy a game in unknown condition out of a warehouse? (Again another Gottlieb oddity. Even one broken trace can definitely Here is the breakdown for Gottlieb Repair Guides. right side connector supplies display voltages to the score displays.) (just use a TIP102). are underrated too. Lamp sockets do go bad. C1 driver board capacitor. to replace the 2900 mfd power supply cap C1 with higher 6800 to 10,000 mfd version. Install a 1 amp slow blow fuse for the transformer's 120 volt input power. burn and the H.V. will be higher than if all the displays are lit. Gottlieb used two slam switches in their pinball games and BOTH (banded diode lug), which is right next to the existing sound board

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