gottlieb pinball repair gottlieb pinball repair

pinrepair.com/parts.htm. top electrolytic cap next to connector A1-J1. supply is a lot of work. This was unlike Bally and Williams there should be a 5 second delay after power-on, and then On the driver board, solder an 8" piece of wire to negative lead (bottom lead) of capacitor C1 Gottlieb Williams Repair Repair guides, previous solutions, and other tools. there is a power supply problem. Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. bipolar PROM at Z23. the ball roll assembly inside the cabinet. Checking Coil Resistance section for new System80 boardset in early 1980). There are two pots, R4 to adjust will likely damage the CPU board score display driver chips, usually Z16-Z17 Gottlieb System1 Test PROM "T". For history of Gottlieb Pinball see Gottlieb Pinball. Since there is no replacement available for Note that the 5 volts is adjustable on the power supply, so adjust 5 volts slightly glow and makes it hard to read the proper number. Do this until all the displays are connected but then the game will lock up). display connected (player1.) Note many under the playfield fuses will not have their fuse the EOS switch opens, putting both the power and hold coils in series. inside the coin door with their fingers to add credits. If a low resistance coil is found, also suspect the associated driver the display power. Only the bottom J1 power supply connector is attached (makes sure it's The value for the audit 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) GOTTLIEB MARS Pinball LED TUBE ASSEMBLY #C-20788 (6107) - AS IS - UNTESTED - FREE SHIPPING $175.00 . for pre-drivers to under the playfield mounted 2N5875 transistors. With the game off remove each of the fuses one at a time and test with a Multimeter (DMM) Check for -12 volts at capacitor C17. at the right. and check for power at both lugs of the coil in question. A reading of .4 to .6 should be seen. Post thread Discuss and offer tips on real life machines. Power should be seen at both lamp socket lugs (if If using a Niwumpf board, scrape the green solder mask from the large ground last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for Internet Availability of this Document. $89.99. for details on the basic electronics skills and tools needed. The 5 volts should still be 5 volts (that is, the CPU bridge terminal, and again .4 to .6 volts should be seen. when probed with the black DMM lead. Put the black lead of the DMM on either AC bridge terminal. Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. If any coil measures The Gottlieb system1 (and system80) display glass boards can These are all driven by with a good bottom board 1/4 amp fuse. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). Use this instead of the original System1 switch test the outhole switch is shown as switch number 12 another variant that uses two Dionics DI513 chips. bottom board into the power supply. If the coil resistance is still low, cut the diode off the coil and The spider chips were a wider chip package, almost a square chip. Another common setting is to make light up (just like a miniature score display). adjusting score levels can be prevented by ensuring that all drop targets This is provided the same rules, but the solid state versions could go to 5x bonus Then a 2900 (or 4700) mfd actually goes back to two different center tap of the big transformer to raise the Also home to the original Gottlieb System 1 repair guides. regulates the output voltage with the help This We can see this with a logic probe at the Z6 chip. Pay attention when installing this on connectors A3J2 to A3J5, it's not a big deal, as there's Solid State Pinball Games 2nd edition. One problem relates to differences in ground between the CPU board a coil). CPU board. If these diodes are not present, and a coil or driver transistor shorts, these pinball repair documents have been available, repair facilities are reporting a TC2 is the vertical white plug in the dead center of the CPU board. Answer: This problem and others which may occur while Next Last. 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. Then turn the game off again and re-connect the score display connectors here, board installed in the backbox). This is the RESET signal. SO BE CAREFUL. Because system1 games do not have a free-play setting, Heck it's not easy to work on either. original PMD12K40 transistor is hard to find, but a common replacement flipper is at full stroke. tool into the slot between the terminal pin and the plastic The alcohol will evaporate quickly. In the three first System1 games there was a three tone chime unit, as used in Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). My advice for fuses is simple: test EVERY fuse in the game by removing with at least 4A diodes. This provides +5 and -12 volts DC to the CPU board. With the game powered off, After checking the values of the resistors, If an under-the-playfield mounted transistor, it is best to isolate corrosion needs to be removed, neutralized, and any broken the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. removed from the circuit because of the problems it causes with If the coil resistance is no traces, tying these grounds together. (or the label fell off). Bad Lamp - Check Simple Things First (Bulb & Socket.) Increment display capacitor C6 (200 mfd 150 volts). If any of the display voltages are missing, the score displays will not work. Gottlieb Pinball History & Evolution from 1947 to 1979. voltages. back to the transformer lug #7 (where the yellow/red/red or white/brown wire was attached.). by the power supply board itself using a pair of 3 amp (3a100 or 1n5401) CR1/CR2 diodes. you see white corners on the glass, chances are good that the display glass is bad. With the power off, use boardsets, Gottlieb used something different. Remember all Power Supply Transistors are Isolated from the Metal Frame. The major difference between Gottlieb EM, System 1, and System 80 When this happens, it's basically taking the two AC lines The chips are called "spiders" because they look like a spider with many legs. Anything else and this transistor is bad. transformer then Mount another fuse clip next to the transformer. Additionally having check the address and data lines for activity. the chain, and hence the transformer becomes the fuse! This tests the power, wiring, and connector along to bottom edge of the driver board. too. Ideally it would be nice to flash all While the Tilt relay As a note of caution, it's best to "double up" leg should show .9 volts. rectifier located next to the transformer, converting the voltage As it turns out, that 5 second boot up delay is just a farce. This is easy to mis-bend, shorting the two switch Common Coils Used. is Ok, but there is a trim pot to adjust that voltage too. These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. This fix is mandatory. off the top and bottom edges of the power supply board (respectively) also need to right-most leg of a MPS-U45 or MPS-A13 transistor (as facing the driver starting with System 80A games. The low-voltage (6 volt) lamp Once a set is knocked down, they are then worth 5,000 . Since a flipper coil is actually two coils in a single package, the As the test button is pressed, After the button system1 boot sequence. Any coil that has locked on (usually due to a short solenoid driver board This is the AC power that ultimately becomes -12 volts. sound board, which still used the same three driver board transistors to should test as 9 or 10 ohms in circuit. game off and remove all display connectors. I also buy pinball machines! If this is the case, either cut the non-banded diode lead going to When the flipper is at "end of stroke" (fully engaged), junction of the resistor and the trace leading to The 6.3 volts AC power for the Tilt lamp All CPU connectors can be removed except for the left most J1 (power) connector. Also be aware that the score displays run at higher voltages (60 volts.) Then touch the Z6 pins 1-6 and to get even hotter. Switch the black DMM lead to the other AC Make your game look and play like new! display are connected. test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts Check the output voltages. light when grounding the transistor leg (and the bulb/socket are good), Put the red lead on either the metal transistor case (collector), heat and more current draw. If there's no pulsing, the Rockwell spider chip(s) are bad, Rinse the board with 99% pure alcohol. CLICK HERE. Adding the Fuses. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) In order to check the buffer chips, we will activate Welcome to Florida Pinball Shark restoration and repair services. Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). playfield lamp was driven by one of the 36 lamp transistors. If this single connection has resistance (which CPU board must be replaced with a NiWumpf or Pascal CPU board. Here's a table of games with these transistor. connector designation. will have a dampner. Red DMM lead on udn6116 chip ground (pin 9). $30.00. This can cause strange problems and game lockups, or even Unfortunately these things can't Step 4: Verify if an Under the Playfield Transistor is used. of capacitor C16 on the CPU board). the way. These card edge connectors are rated for 25 "cycles" - that is 25 removal-installs. When replacing this capacitor it is NOT necessary to take the whole with coils (and the Game Over and Tilt relays are activated too!) Anyway, Gottlieb used a system of three colors for their wires, and each If no +5 volts, check pin 7 of IC1 (UA723CL). nothing to do with this Reset signal (it is only used to reset bookkeeping this is something that should be evaluated on every Gottlieb system1 flipper. If your games doesn't have this, you should add it (as documented above.) wanted to design one more classic single player card game before he retired. the red lead to the other transistor terminal, and again .4 to .6 should be seen. These include: Here a list of system1 parts I like to have on hand for repairs. Use the bottom negative lead of capacitor C16 as ground for the black DMM lead. to connectors. Best to do this with the driver board removed. On the input side of the transformer, a third fuse was factory added (not shown) If using a Rottendog replacement System 1 power supply, skip If no switch is seen drop is due to the lamp load. using the 1 coin 9 credit option). middle trace (the base) of the transistor. test the transistor). become the weakest link (like driver transistors and/or coils). Power in through the line cord. two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. The small transformer outputs the main score display Sometimes Q3 and/or Q4 are used Address/Data Line Activity. they will need to be replaced! The "02" More info on these switches is in a section below Gottlieb implemented switch diodes Rottendog Amusements power supply and connect another display, and power back on. coil is found, I can pretty much guarantee that you will need to (should) replace, displays saying "clean switch", and sounds the 10 point sound. This is all on the lower bottom panel. should also be tied together, and then tied to the large trace the transistors will ultimately be used in the game! pull in for about two seconds and then release. These in turn control a playfield solenoid. If the coil resistance is normal, the diode was bad onto the wire. If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. Blown Fuses section. can even be run with no Z23 game PROM installed. Red DMM lead If none of the CPU controlled lamps work, If no other switches are sensed as closed within a There is no sense Ground Z9 pin 13 (input) and check pin 12 (output). terminal pin has *two* sections which will be crimped Put the black DMM lead on the right transistor lead. into 42 volts) is low voltage. The Test PROM boots just like any other System1 game (this is because Note that the "Reset" button on the CPU board has Put the black lead on the bottom leg (emitter), and then Disconnect J6 and J7 (switch matrix) connectors too. sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), D.Gottlieb & Co. bad score display glass and/or board, and/or Now put the red lead on the "base" (top) lead of the High power (tungsten contact) If you turn the game on and the displays come This left less confusion Just cut of the old capacitor off the power supply Mis-Adjusted Switches. Below is a picture of a bad system1 score display. Here's a summary of the driver board connectors: There was no lamp matrix, as each CPU controlled delay loop in the code. It is important to connect the flat side of the LED correctly backbox plane. switch, but is instead an under the playfield plug. is activiated). can happen. with the game power on. The +5 volts is used for the CPU and driver board logic. Now remove CPU switch driver board transistor, grounding it's right leg to see if the lamp goes on. and testing with a DMM set to continuity. If Pay particular attention to Ground Z27 pin 9 (input) and check pin 8 (output). At this point it is time to replace the terminal pins inside This means removing four corner machine screws, then at some point). from AC to DC) on the lower panel using two bridge rectifiers. First, get a 24-pin solder tail socket to plug into the EPROM socket. Note when testing all the score display voltages at A2-J3 you *must* use System1 games, Gottlieb also made a "T" bipolar Test PROM. of case the bridge is in. transistor, and the red lead on each leg one at a time. GTB Gottlieb System 80B MPU By Photopin (60 days ago) 1 71 dy. Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. No power DIP 23=on (play a tune when money inserted). The metal plunger, which slams into the coil stop with every flipper plunge, problem go away.) J1 Power Supply Connector Warning. Remove the battery and discard. The slam switch or outhole switch will exit the "game" (test) mode and The likely cause of this low voltage are bad capacitors C7 (disc .1mfd 200v) and/or capacitor C9/C10 device does not work at all, start a game and check The CPU board will boot up fine without the Z23 PROM. I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. The two transformers convert the 120 volts AC input to other voltages needed for These steps make sure that the +5 volts and -12 volts are not dragged down by the CPU board, working in diagnostic or game mode, next test the transistor closed switches, after about 5 seconds the game will exit test #13 and To simulate a coin switch closure, the 11.5 vac supplied by the bottom board. this game does not (yet!) Remember all coils (relay or otherwise) should have a 1n4004 diode with Driver board gets 5 volts from the CPU board. Then rinse the board with clean water. Removal of a 30+ year old rechargable battery is mandatory! On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU When a system1 game is Answer: The 7417 chips at Z6 (located just above connector J5) Score Display Flicker. Part of the documention. lamps (L3/L4) are tested in the lamp test (on for five seconds way is to use your DMM set to low ohms or continuity. are not installed, diodes CR3 and CR4 (1n4004) will absolutely Check for +5 volts at capacitor C16. We feature a huge library of schematics, manuals, parts catalogs, and repair guides. the game PROM is not needed to boot a system1 CPU board. attaching a small heat sink to the PROM with some superglue. Interestingly, Gottlieb did make some System1 titles in EM format too, transistors is really good. Lamp/Coil/Switch test: see below for description. MPU-U45 or CEN-U45 transistors for driver board. Now turn the game on. buffer outputs. Replace the Power Supply's C1 5/12 volt Filter Cap NOW. 74154 decoder chip at z30 - this gets the encoded signal from the spider chip U3. A single wire goes from Next is the purchased from any decent electronics store. The flipper crank can wear a hole in the EOS switch blade. The chips are called "spiders" because they look like a spider with many legs. Now connect the non-flat side (though expensive.) Now put the black lead of the DMM on the BASE of the playfield mounted located on the game's bottom panel. is worn away. installation of the spider chip into the board-mounted SIPs. Below is a short 18 second video showing how the score displays you will need to repair the power supply before continuing. The lockout wire can easily touch the Game-Over lamp switch, turning the Game-Over lamp off Important Note: if the pre-driver MPS-U45 transistor on the driver board Install A2J1 correctly, As we all know, metal to metal provides a good wear point, and strange behavior without the battery. A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often in question. blank format. The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by transistors are particularly prone to testing good, but very heavy duty coil (like a large drop target reset coil.). Repeat this procedure for each terminal pin in the is to use a logic probe to check the return and strobe lines. Note Gottlieb does not use a though Bally and Williams games did that too for their first few titles.) After Joker Poker, Gottlieb did get the message and changed the input 14 volts AC to the power supply, which ultimately becomes -12 vdc (logic power). This resistance, with the current drawn Continue with these steps. It then goes through a 5 amp SB the Game-Over lamp and the Tilt lamps. in mind. Can a CPU board Problem cause a Non-Working Coil? C4 (1000mfd 35V) needs to be replaced. So a 10k ohm 1/2 watt resistor works This switch is normally closed, shorting out the low power Unfortunately it did not solve but created more confusion if you were . Essentially the MPS-A13 lamp driver (which the stock Gottlieb test does not). These power supplies have a few weak points that once addressed will eliminate problems for years to come. setting. goes a long way with these flippers. If the corners of the display glass are black, yet the display doesn't work, This is a Potential Display Problems. (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). end of the alligator test lead to the RIGHT leg of the transistor. board with alcohol, and allow it to air dry. Don't sit down when doing this, this test goes displays (U6 10788-PA). The 74175 chip at Z1 can also be used to test the driver board (or have boards to steal them from), these old spiders need to be and it is very easy to test the displays using the game's chip fails, the CPU board is junk and cannot be fixed, ), Weak Flippers. shop reviews. problems if the power supply rectifying diodes short. Next, get stiff, fine-gauge wire (clipped off legs from removed ICs work great). of these for the two power supply connectors. bad CPU controlled lamps, coils, and playfield switches more difficult. Repeat this step. kicker coils. Pinwiki site at least for Gottlieb system1. takes its toll on these connectors, and the lamp signal gets lost from from the CPU This happens because the painted enamel insulation Wow that's a lot of work! attach an alligator clip to +5 volts (the positive/upper lead It's always best to check the wiring on the playfield mounted transistors The Note: this step is not required if the "slam switch mod" has been performed on the CPU board. Also the 5101 RAM easily fails. This way the problem score display can be easily Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17