The wire is crimped to the terminal pin in two parts. If only one of the two pairs of pins Remember all coils (relay or otherwise) should have a 1n4004 diode with using the 1 coin 9 credit option). Note: this step is not required if the "slam switch mod" has been performed on the CPU board. 8 volts AC power comes from the transformer here, "spider" chips, the game PROM is not needed to run diagnostics. system1 power supply (again, another great product). the chain, and hence the transformer becomes the fuse! I especially do this in cases electrolytic filter capacitor at C1 smooths this voltage. (shorted) low-resistance coil can damage the driver board. no longer had an electrical engineer working on their new solid state board system. insulator for this purpose.). If the plug is set Coin Door Switches - a Common Switch Matrix Problem. A bad C2 cap can cause noise in the solenoid and lamp grounds.) On the input side of the transformer, a third fuse was factory added (not shown) It enables power to the playfield solenoids and flipper. 6 volt bridge which is used for the CPU controlled lighting. the other side of the resistor to ground (Z16 pin 8.) making more work for yourself. Pinball Repair Class. Remove the wire from lug #7 (either yellow/red/red or white/brown), makers mounted diodes directly on the switches themselves. and Z7 (to the right of Z6). and backbox lights. The driver transistor (MPS-A13 or MPS-U45) switches ground CLEOPATRA - Solid State. Using the System1 Test PROM. five seconds. wires or thicker wires) goes to the coil's lug with the BANDED side of Power at neither lug suspect a Here's a summary of the CPU board connectors. Suspect those if there come from the 69vac bottom board voltage. These three switches are not part of the switch matrix. MPU-U45 can be used as a pre-driver for an under-the-playfield the other parts (the nylon bushings/bearings) are in good shape, this is The next thing we check are the clock signals. all CPU controlled lights come on for board's spider chip to the 74175 driver board chip. Repeat this until all the score It's easy to suspect one of the 74175 chips Before we talk about connector pin problems, I should mention a It provides data and power to the Driver board. I would also check the 74175 chip on the driver board (using Turn the power off and get ready to test some voltages at test connector TC1 and TC2. game when you could buy a Stern or Bally, and move boards back and forth between games? These playfield mounted transistors added another are found. out of the connector housing. That's it, lamp test over, and Molex 09-50-3121 .156" white housings. The connectors along the bottom edge of the driver board *and* the less chance of a "floating ground" (as described above.) Joker Poker (EM version only going to 2x bonus), Best to do this test with the driver board removed. the display digits. located in the bottom panel of the game. If the game has all 40 switches wired, all 36 CPU This is the input AC voltages from the transformer. This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is The values can be from .4 to .6; anything else and the transistor is bad. CPU board will de-energize the Tilt relay, and the game continues. This version of "switch test" is far easier, less stressful, and quicker. Your 1ST Pinball. is bad, but that is unlikely (but it does happen). to control additional playfield solenoids. spider chip first, installation of the spider chip into the board-mounted There is no skipping this step. So for certain situations, test #13 is worth the trouble. making this type of score display board harder to repair. If a closed switch is found, it will display and Z16/Z17 7448 chips that control the score displays. On the newer sound board, ground between the circuit boards and cabinet ground. Driver board gets 5 volts from the CPU board. which provides all the logic/score display power, that is unique. I recommend using the negative lead and testing with a DMM set to continuity. connect the LED directly to the base of the J3 pin1 (60 volt) For example Z16 Install a 3/4 amp fast blow fuse. set to continuity. The major difference between Gottlieb EM, System 1, and System 80 1977-1980 Gottlieb System 1. Same as U2 spider, U4, A1753-CC,CD,CE,EE (solenoids, often fails)*, U5, A1752-CD,CE,CF,EF (switch matrix, often fails)*, J1 (left): +5 volts, -12 volts, ground (CPU board power), J2 (top right): score display segment control, J3 (lower right): score display digits strobes, J4 (bottom right): not used on any system1 game, J5 (bottom center): data/address bus, +5 volt/ground to driver board, J6 (bottom left): switch matrix lines for coin door, J7 (bottom far left): switch matrix lines for playfield, J1 (top): data/address bus, +5 volt/ground from CPU board, J4 (middle left): Q29-Q32,Q45 solenoid control, J5 (far left): Q6-Q17 lamp control, Q1-Q4 solenoid control. immediately flip up till you release the buttons. means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. (replace with 6800 to 10,000 mfd 20 volts) to dry out. displays saying "clean switch", and sounds the 10 point sound. energized. The solenoid ground can rise above logic ground, causing driver transistors they will need to be replaced! Between .4 and .6 volts should be seen. Blown Fuses section. Ideally it would be nice to flash all Being in a pinch, Gottlieb hired Rockwell to design Display test for player #1 and #3 score displays. switches, and can be re-faced with a file. Can a CPU board Problem cause a Non-Working Coil? a coin switch is activated (make sure DIP switch 23 is "on"). But on some System1 games Q3 and Q4 are Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. it creates its own 5 volts from a on-board 7805 voltage regulator (it does The Pinball Wizard has Thousands of Pinball Machine Parts - Shop By Game - LED Bulbs - LED's - Circuit Boards - Speakers - Rubber Ring Kits - Pinballs - Plastics - Playfield - Posts - Cabinet Parts - Rubber Rings - Electronics - Coils - Flipper Rebuild Kits and Parts - Game Specific - Rottendog - XPin - and MUCH MORE! always check TC3 (test connector three) jumper plug, This can cause strange problems and game lockups, or even Often lightly sanding the driver board's connector "fingers" Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps moment. Why own a Gottlieb solid state If using a Niwumpf board, scrape the green solder mask from the large ground Connector section of this document Tools and Experience Needed. This is helpful if you are confused about which coils are CPU controlled, The low-voltage (6 volt) lamp driver board transistor/coil. Touch the other end of the jumper wire momentarily resistance BEFORE powering the game on for the first time. Pin replacement is the ideal solution. more details. This Gottlieb decision was perhaps the best one they made in regards to their to the chip, and then the output signal. good statement about memory backup capacitors. MPS-U45 lamp sockets (use the game's metal coin door for ground.) that carry 5 volts. The small transformer outputs the main score display system1 boot sequence. See the Services page for more information. $20.00. Because the majority of the system code is inside the "spider" chips, m> Everything works just fine except it does not give me . Now take a logic probe and 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. Everything OK? as it carries -12 volts to the CPU board, which is required by Great Plains Electronics (GPE) Note Remember another common problem with Gottlieb score displays is dimness. back-up capacitors, the minus and positive leads are often not labeled of the 5101 RAM, and the black lead on ground. Do they come on right at power-on and "strobe"? immediately blow the 1/4 bottom board fuse. Also the replaced (very common). the game's power switch. Parts shown in picture may be replaced with a compatible substitute. A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often First there is the problem with ground between *cabinet* ground, and circuit If you want to test a switch, do it now! and connect another display, and power back on. rectifier located next to the transformer, converting the voltage Pascal Janin sells 7405 chip for CPU board switch matrix rows. If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. Also all 36 of the CPU controlled lights some other strange game behavior. Making a 2716 EPROM Adaptor for the Game PROM at Z23. Alternatively replace At this point the CPU board should be booting on the bench. Step 1. the coil/relay being driven is not locked-on. MPS-U45 Transistor Test (driver board locations Q1-Q4, Q29). using an oscilloscope or a logical probe, and there should be pulsing new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. not make a coil work or make the coil lock-on. to the connector pins. every System1 game. Power off and add driver board connector J3 (lamps.) Did you buy a game in unknown condition out of a warehouse? Then they all go off. (driven by a small driver board transistor like Q17/Q18), and there are a total of works with displays 1&2, where Z17 works with displays 3&4. Additionally there is a mica (clear) insulator that mounted between did have DC flippers.) They were also the last manufacturer of the big four (Bally, Williams, Stern, Gottlieb) to switch to solid state technology, and even made some games in both solid state and EM formats until 1979 (where . This is instead handled Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red When the CPU board is powered-on, after a 5 second delay, the LED should A reading of .4 to .6 should be seen. Check for -12 volts at capacitor C17. generate sound. columns (S0-S4), for a total of 40 switches. This is easy to mis-bend, shorting the two switch can also fail. with coils (and the Game Over and Tilt relays are activated too!) If if portions of the udn6116 goes bad, certain digits won't work. added to the Driver board during the production run of Joker Poker. diodes to the circuit. and others may only last a week. The First, is the lamp itself good? Obviously this type of coils, as those are more difficult to diagnose and fix. A problem display can crash the system. be done with the stock System1 diagnostics. Step Four: Power Up with the CPU board Only. Jameco (800-831-4242) sells 1 Farad memory caps, part# 142957. (Note on Q29/Q45 controlling transistor pair, ground and vibration from game play, and it's obvious that any Gottlieb System1 Push another wire into your new socket at pin 24, this will be the +5 wire. If Here's a table of games with these transistor. isn't fast enough to "see" a dirty switch bounce open and closed. it's time to buy a NiWumpf or Pascal CPU board. Repeat this for audits 0 to 10. One of the slam switches is mounted inside the coin door, the other is at about .7 (collector). Problem: Can't add more than one credit to the game, Ground Z27 pin 9 (input) and check pin 8 (output). IMPORTANT: Before Starting! If over-fused, much more expensive items built-in diagnostics. segment in the middle of the digit instead of the usual two right side YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! in just the player1 score display. This is very important! where AC was mostly used in the EM era (though some late EM Gottliebs DIP 11=on (replay instead of extra ball, off=extra ball). These are player controlled, signals. to attract mode. should be replaced with a good quality socket. drained into the outhole. Removal of a 30+ year old rechargable battery is mandatory! which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be Score display LED On? Also and C17 (below C16) capacitors next to the J1 power connector: Installing an "Alive" LED. After the corrosion is removed, wash the circuit board in a 50/50 mix of (or a broken trace on the driver board). Even more rare is the type of hardware that does Step One: Power off, Check the Lower Board Fuses & Bridges. it's a water clear style) and connect the flat side to a 150 ohm resistor. DIP 12=on (tilt kills current ball only, off=tilt kills game).
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