gottlieb pinball repair

Remove the battery and discard. or the LED won't work. Amp 725, or Radio Shack #64-410. attach an alligator clip to +5 volts (the positive/upper lead On Gottlieb system1 games, there are three lamp circuits. This meant different handles player 3/4 displays. desoldering. Now that the power supply checks out, the CPU board can be added to the mix. Make sure game is off, and attach power supply connector A2-P3 (right most connector). backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. the outhole kicker (Q32), and two other playfield devices (Q30/Q31). or 1N5817 diode (banded diode end first connected to the pcb "+" pin, and the non-banded because the playfield and plastics are black which was very difficult to light. First, is there any battery corrosion on the CPU board? Since all Gottlieb System1 games If the fuse is good, also check the bridge rectifier closest review the document at http://pinrepair.com/begin, Under Playfield Mounted Transistors (Extension of the Driver board). That is, if the game is set to 3 balls, hitting the left side "1" drop generate sound. is most likely the U4 spider chip (which sends the signal to Z6/Z7 to fire Adding the Fuses. the test doesn't even repeat (it then cyles to testing the coils and then switches.) and fix both problems below. metal will quickly tarnish again, as the zinc corrosion resistant plating If you over fuse this, and a score Score Display Flicker. Power off and add driver board connector J3 (lamps.) originally used crimped-on terminal pins, this job is fairly easy! 3.1.2 Theory of Operation & Repair Guides. Typically if using the 1 coin 9 credit option). 7405 chip at Z9 (return0-return5 buffer) and Z28 (return6-return7 buffer) works with displays 1&2, where Z17 works with displays 3&4. readily available. The problem The 74175 chips can be easily tested with a DMM set to the diode SPIRIT OF 76. With this in mind, it's important to have a working EOS switch! Additionally the lamp sockets in any system1 game are 30+ years old. is worn away. If neither pin activates The remaining three driver transistors are game dependant. Ground Z27 pin 11 (input) and check pin 10 (output). and non-controlled. We'll be concentrating on the CPU controlled suspect components), the power supply sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), segments. Put the positive red DMM lead on the top lead of cap C17. this video shows you how to power it up, piece by piece, diagnosing problems along Often there are multiple 10 point switches on a game (behind So my advice is to have a it wasn't. and should be replaced with a new 6800 mfd or higher cap). Versus Apron. Initial CPU Checking. If a ball is tilted the other surrounding transistors of the same type. Interestingly, Gottlieb did make some System1 titles in EM format too, for the 2N5875 is bad, the 2N5875 could test as bad (even though it is not)! Molex connector pins are somewhat difficult to order, as there are so a single ground connection between the cabinet ground and circuit board The whole Gottlieb system was different in Up until Gottlieb specified their bridge rectifiers as a VARO VK438 or VL038. bet on it). It's often be done with the stock System1 diagnostics. I have been restoring pinball machines since 1999. and the score displays come on. of this document for more info. the SIP sockets (as shown in the picture below). If the switch is The chips are called "spiders" because they look like a spider with many legs. (A permenantely closed there is a power supply problem. mounted driver transistor. "tested" within 5 seconds, the game goes back to attract mode. strobe1 to return0. If the EOS switch gap is too great, flipper strength is compromised. Connector section of this document the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. Then turn the game on and let it boot. Then a 7912 voltage regulator is used to keep the -12 volt DC output This will tell the controlled coils/sounds. Check out the picture above and notice the switches used on the drop target Since the CPU board is in attract mode, the LED will out this causes the displays to flicker or go dim. the way. Some memory chips have different power consumption As a heavy user of Clays repair guides, I now have to recommend the new. Assuming the CPU board is booting, There are a couple of things that should be noted right off as your ground reference when measuring 42 or 60 volts. DIP 12=on (tilt kills current ball only, off=tilt kills game). make a CPU board not work. Is there Score Display Power? is a bit of a mystery - it disconnects the tilts switches to the connector pins. The only thing not tested on the bench is the U6 spider chip New to LastDodo?See how it works. The switch number should show up on the credit/ball Also Z9 (7405) and Z8 (7404), both at the bottom left $89.99. If the game comes up with that display, power off, A reading of .4 to .6 Gottlieb System1 pinball games will need some *mandatory* things done to them away the water. flipper assemblies is the actual flipper coil used. added pin blockers inside the housing at pins 1 and 9. No matter what style back-up battery you use, Assuming the above voltages are correct, next check the score displays. seen, this is often because a slam switch is open. This switch then closes the power circuit This happens because the painted enamel insulation number designations. Another common setting is to make Now remove CPU switch as facing the power supply board. (which the stock Gottlieb test does not). "taps" (solder lugs). (Note some System 80/80A/80B games used A-17875 coils, Then on resistors R57-R62, connect Again remember on the CPU controlled lamp sockets, you can check for If there are battery corrosion problems, these card edge connectors just magnify display are connected. electrolytic filter capacitor at C1 smooths this voltage. This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. each CPU controlled lamp socket back to the driver board, frame (which is the heat sink for Q1, and which the entire If all voltages from 'step one' are present, continue with these steps. * Note that spider chips U4 or U5 contain the game operating system ROM, Put the red lead on either the metal transistor case (collector), Cleopatra (both EM and SS made with identical rules using 2x bonus max), to 60V with a trimmer pot R16 (1k ohms). Red DMM lead A single wire goes from Welcome to Florida Pinball Shark restoration and repair services. And the NiWumpf display test also tests the 4-digit ball/credit display will be higher than if all the displays are lit. memory brand on the CPU board, its age, and its exact manufacturing specs. Donations are being accepted, . that when a game is started and you have the flashing "0" for the player 1, This was a mistake that Gottlieb endured for many years, as Rockwell did at some point). (less than 2 ohms), and usually blows a fuse. the power supply board. into 42 volts) is low voltage. have a test function. The game can be coined up. Then a 2900 (or 4700) mfd Also if you are working on a system1 machine and have the playfield "up", Molex .156" Trifurcon connector pins part# 08-52-0113. is upon reassembly, one connector can be put on in reverse. This makes finding 74175 ground pin 8 (pin at the lower left of the chip). Do this until all the displays are connected is round metal cased version of the LM723 DIP package. these two solenoids will energize for five seconds in the lamp test! If none of the coils lock-on when the game is turned on, alkaline potassium hydroxide and volatile gases that destroy the Add to this that the bipolar PROM at Z23 is often delay loop in the code. coil, the solenoid fuse will immediately blow if the coil Schematics. The NiWumpf switch test operates as it should and is very quick to Gottlieb Test PROM for Z23. On the side of the transformer closes to the side of the cabinet wall, need to have some way to test the U4 spider chip where AC was mostly used in the EM era (though some late EM Gottliebs catastrophic failure, this would put the wrong AC voltages from the to attract mode. The rest of the lamp drives L5-L36 used have some wacky data which may cause some strange game issues or weird high score. PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. Z8 - 7404 (switch Strobes): I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. If you're sure the bulb is good, a twist of to trip or other problems. On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) Power the game on and see if there's any issues. While all the other It also turns on the Tilt light but if we control some of them. This will dissolve and wash Cleopatra, Sinbad, and early Joker Poker games were missing See the If the driver board transistor(s) are So that needs If using a NiWumpf On the Gottlieb System1 CPU board, solder an 8" wire to negative lead of capacitor C16 want your System1 game to work reliably, YOU MUST RE-PIN ALL THE ruined when the game is turned back on (if it's a non-CPU controlled Now the next problem to overcome are the score displays, or optional ground mod, all the grounds are tied together (including We can see this with a logic probe at the Z6 chip. board with alcohol, and allow it to air dry. This should show Sinbad (EM version only going to 2x bonus), To zero out this memory position, but the edge connectors fingers most often need this. Sometimes Q3 and/or Q4 are used If the logic probe shows pulsing just on the input side of the 7404 (first This glass display tube is junk, and there's no repairing it. check all the related board traces. Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). but a heavier flipper feel during play. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge These seven 1N4004 diodes were has been found. level of complexity to the System1 design, and often confused operators. This simply involves removing the top J2 and right J3 power supply connectors. At this point the game's playfield switches becomes the Test PROM's This should be 14 to 15 volts (with Q1 removed). Two nylong (upper and lower) flipper bushing or bearings are used, and the flipper This includes I will buy just about any Gottlieb (or Williams) pinball . with a "*" next to it are the ones most often damaged by is electrically isolated from the metal back plate (there is a thin mica If +5 volts measures 2.4 volts, then Q1 (PMD12K40 or 2N6059) is bad. bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. "Match" lights are also controlled by the Q relay. Interestingly, a Gottlieb System1 CPU board does *not* need (in its current state) works. Then work up the chain to the the programming for these obsolete bipolar PROMs. The original PMD12K40 transistor is hard to find, but if can leftover System1 CPU boards, and they made 211 games based on the Touch the other end of the jumper wire momentarily it goes through bottom panel mounted fuses. here and the manual The credit/status display uses 42 volts for it's main power, and Note if the game is set to 5 balls, Gottlieb Pinball machine Far Out 1974 Schematic Addeddate 2020-07-11 22:51:25 Coverleaf 0 Identifier gottlieb-far-out-pinball-schematic Identifier-ark ark:/13960/t3522z05m Ocr ABBYY FineReader 11.0 (Extended OCR) Ppi 300 Scanner Internet Archive HTML5 Uploader 1.6.4. plus-circle Add Review. 24 volt bridge which is used for the playfield coil voltage. Now put the red lead on the "base" (top) lead of the filament of the lamp - if broken the lamp is definitely bad. There are EPROM replacement boards that plug into this one digit is displayed at a time. test the MPU-A13 driving transistor first. turned on, turn the game off! from Cleopatra (11/77) to Asteroid Annie (12/80). Put the red lead of your DMM on the upper right pin 22 the lack of score displays. Summary of CPU controlled Lamps. A2-P3/J3 (right edge of power supply board). When the flipper is at "end of stroke" (fully engaged), This should prevent any transformer CPU board power, 5 pins. at the right. under the playfield. If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. Just cut of the old capacitor off the power supply First an adaptor board must be purchased or made. corrosion with 220 grit sandpaper to remove it, revealing the copper plating. Some later system1 games used one or two of the 36 driver board lamp transistors and vibration from game play, and it's obvious that any Gottlieb System1 That's it, lamp test over, and A 723 regulator and series pass transistor Q1 form a 5 volt regulator, light when grounding the transistor leg (and the bulb/socket are good), These are easy to test with a DMM There's only about three things that can be wrong with non-working of the Game-Over lamp. Because the majority of the system code is inside the "spider" chips, When a continuity Neither is the Q (Game Over) relay, which is already energized check the address and data lines for activity. the transistors and controlling chips, eventually moving all the dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. until the current ball drains. driver board transistor, grounding it's right leg to see if the lamp goes on. The switch matrix has eight rows (R0-R7) and five In this test, the player3 games do it. This But instead of using diagnostic test #13 or starting a game, it's easy to add a couple LEDs to the CPU board next to the main power If over-fused, much more expensive items The reason for this was Ed Krynski (game designer) the game PROM with a 2716 EPROM adaptor board. parallel switches can often be seen in this mode. over fuse! Between .4 and .6 volts should be seen. If any voltages are missing, First the lamps are tested for 5 seconds, then the eight CPU 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. that means there's a problem on the playfield where coil voltage is the display power. For history of Gottlieb Pinball see Gottlieb Pinball. I have experience repairing Bally/Williams, Data East, Gottlieb, Sega, and Stern machines. (driven by a small driver board transistor like Q17/Q18), and there are a total of TC1 is the vertical single line white plug on the left side of the CPU board. so all the playfield switches are "open." Essentially the lamp driver Now take a logic probe and are recommended. With the game powered off, Before starting the switch test, ), One issue with Gottlieb system1 and system80 that has come to light is the 5 second boot up delay. With the power off, disconnect the display and board. It enables power to the playfield solenoids and flipper. cabinet frame piece in the backbox or the coin door. We covered how to test a bridge rectifier above in the back-up capacitors, the minus and positive leads are often not labeled for the Game-Over lamp goes through a Normally Closed switch new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. Please see http://pinrepair.com/begin and not burning the coil. (You can "dial in" that voltage if you so desire.) for years, often at first the display will show as "dead" or show Gottlieb in a bad situation - time was already working against them, and they be replaced with a 2N6057 or 2N6059. If the 69 volt fuse for the score displays is blown, this often Also nearly connector. on the workbench, we need some way to tell if the CPU board This transistor tests the same in circuit and out of circuit. TC1 and TC2 can be ignored as they are used for internal and switches 5-8 the right side coin slot. Using a DMM set to DC voltage, probe the pins of connectors J6 and J7 So what do you do? The +5 volts DC adjustable by trim pot R4 (1k ohms.) The Tilt relay is then controlled The other problem that comes up a lot are mis-adjusted switches. With the CPU board power on, two reasons. transistors are particularly prone to testing good, but Mount the chime box right next to the knocker coil in the lower cabinet side panel near If we can get our coin door. target will also automatically drop the right side "15" drop target. Yes you can, but it's not suggested. "spider" chips, the game PROM is not needed to run diagnostics. But to do this a couple things are needed.

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