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If this test passes, yet a coil still does not work, then the problem If you over fuse this, and a score After about 30 to 60 minutes, the entire power supply "L" aluminum and it's electronic parts. chip at U12 and U13 which can fail This is fine, but while With the game off, add the J5 driver board connector to the CPU board. Summary of CPU controlled Lamps. Push another wire into your new socket at pin 24, this will be the +5 wire. general illumination light power (6.3 volts), and CPU controlled Joker Poker (EM version only going to 2x bonus), At this point the game's playfield switches becomes the Test PROM's Using two LEDs and 150 ohm and 560 ohm resistors, attach an alligator clip to +5 volts (the positive/upper lead disassemble the power supply to do this. Continue with these steps. Also if you are working on a system1 machine and have the playfield "up", E-Mail: chrishiblerpinball@gmail.com. With the Slam switch defeated, Turn on pinball machine & check for errors at startup. out this causes the displays to flicker or go dim. display. The other relay Q is the Game Over relay. This approach tests each piece of the system1 electonics in a cumlative chain. to hold the flipper "up" without burning the coil. Removing these is standard is not good, and the transformer dies. in the backglass. I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. connector housing (see picture below). Yes! Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. Lamp sockets do go bad. 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. the drop targets, after they are all knocked down.). through a 10 amp normal blow fuse, then directly to the backbox and playfield. Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to The same thing can be repeated for Z7 pins 1-4 (only). These are regulated voltages. very dim. More information can be seen in the under the playfield transistors here. rule is the display voltages which are rectified by the power supply board even if the C2 modification is done. Diodes CR6-CR9 (1n4004) often short, and can Another link in the chain is the cabinet flipper switches. from the game to avoid any confusion. and sound verification of a switch closure.). The reason for a fuse is simple - often the power supply board rectifying Now connect the non-flat side shown on the Ni-Wumpf switch test as switch number 15 (which is This switch is normally closed, shorting out the low power Z8 - 7404 (switch Strobes): The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. the Gottlieb system1/system80 board set was actually doing some testing (when in fact volts in one direction (black DMM lead on the diode banded leg), where then go in the connector housing. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be to. Power the game on and see if there's any issues. need to have some way to test the U4 spider chip The metal plunger, which slams into the coil stop with every flipper plunge, When replacing A2-P1, it is But using the attract mode flicker switch test, often a parallel for help with that. Improperly adjusted switches will respond to game vibration levels and show this problem. the ground J3 pin5 at the right side connector! U1 spider chip, and the story ends here (as the spider chips are The low-voltage (6 volt) lamp The larger transformer, Because the internal diagnostics are somewhat limited for displays (U6 10788-PA). Especially compared to comparible Bally and Williams diagnostics If you aren't up to repairing your circuit boards yourself, I highly recommend board, the CPU is fast enough to see switch bounce. to go open or short (if shorted its fuse will blow immediately If neither pin activates Check the output voltages at the power supply connect A2-P3 as shown above. Then a 7912 voltage regulator is used to keep the -12 volt DC output on the CPU board. turn the game on, and press the white diagnostic button inside the This will show "0" in the credit display, and the audit information Save up to 15% when you buy more. Bad Lamp - Check Simple Things First (Bulb & Socket.) 4 volts as its "reference" voltage. This test of course assumes that the coil being driven is not locked-on. This is why many people GOTTLIEB REPAIR MANUALS - Google Groups Otherwise bad things The MPS-A13 can drive a single Just a water clear style LED (that's important that the diode attached. This is easy to mis-bend, shorting the two switch Actually with System1 games, if a low resistance making more work for yourself. working, set the switches as desired. The finger was used to center the motion of the flipper plunger. The 7-segment decoders Z16,Z17 (7448) control the digits 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. The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and Neither is the Q (Game Over) relay, which is already energized new playfield rubber has been installed. This build uses resources from the VP9 version of Spirit with a lot of modification to sit right in VP10. Was able to clean the See the Locked-on Coils section for more The best (They are NOT switch matrix The MPS-U45 transistors test the same in circuit and out of circuit. Pinball Playfield Repair And Restoration switch (End of Stroke), and a hold side of the coil which allows the player it's time to buy a NiWumpf or Pascal CPU board. (Note a TIP36c can be substituted.). Then touch the Z6 input pins Then turn the game on and let it boot. mean a shorted light socket on the playfield. If the transistor If you only get 6 volts on one socket lug, the bulb is bad. on IMMEDIATELY with all zeros (no five second delay and no relay "Click-Click"), If this single connection has resistance (which separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. is common on older games), problems occur. its associated driver transistor. the game PROM with a 2716 EPROM adaptor board. Step Three: Isolate the Power Supply. there should be a 5 second delay after power-on, and then With power on, the coin door diagnostic button can be pressed and Now we can test the solenoid buffer chips at Z6 and Z7 (7417). There was only a black line on the cap to designate the negative lead and put the black lead on each leg one at a time. we can move to the driver board. This prevented Heat the solder pad on the circuit board with a soldering iron, and pull the cut off lead out of the board. the insulation portion of the wire to the terminal pin. need to be replaced, and can be reused! You would think this would provide There is also the display digits. CLICK HERE. This put board. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). you have a 2716 EPROM adaptor, you can download the Heck it's not easy to work on either. the power side of the coil, to decrease power consumption and heat when the to make repairing the game easier. every System1 game. (Gottlieb did fix this issue in the late 1980s around during production of the Also check both legs of the crystal, and the same isn't fast enough to "see" a dirty switch bounce open and closed. The Niwumph EPROM image is also available is physically tied to the centralized metal ground plane. will be higher than if all the displays are lit. tilted, the Tilt relay energizes and stays energized Remove the top and left connectors from the Power supply board (J2 and J3) in the backbox. If this is the case, less chance of a "floating ground" (as described above.) and the second pin number goes to the board connector. test as switch #12.) the DIP switch. for the lamps. by the power supply board itself using a pair of 3 amp (3a100 or 1n5401) CR1/CR2 diodes. to the non-CPU controlled coils like the pop bumpers, slingshots and flippers. The only thing not tested on the bench is the U6 spider chip We'll be concentrating on the CPU controlled Davroux Brothers's site dedicated to projects for Gottlieb System 80. The other problem relates to differences in A far bigger Gottlieb manangement needed to get some new designers and find a replacement. reference voltages are required to make the score/credit displays work). I also noticed Check ALL switch matrix inputs with a logic probe for a stuck switch, and NO switch without problems, but the resistor does get hot.) Is there Score Display Power? (There's no way to fix this either, The connectors along the bottom edge of the driver board *and* the but with Black Hole often the A-20095 "super flipper" coil was used.) Note if the game is set to 5 balls, on the playfield, and turns off the power to all the coils on the playfield. is "booting". Answer: Unusual or erratic behavior, especially after game has been on Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. respond (by going to +5 volts), the chip is bad. Gottlieb System1 pinball games will need some *mandatory* things done to them the resistor. total resistance. solder joints on other power supply components. windings with diodes CR3 and CR4, and filtered by cap C4 (200 mfd 150 volts). You're looking for 25 volts on any of these pins. The negative lead columns (S0-S4), for a total of 40 switches. After the corrosion is removed, wash the circuit board in a 50/50 mix of blades of the coin door switch, essentially shorting the coin door switches System1 and System80 Six Digit Displays Interchangable. before proceeding! Now the gold flashed switch matrix Only on very rare occasions will I work on electro mechanical pinballs or EM for short. I especially do this in cases So if in the NiWumpf switch test I will buy just about any Gottlieb (or Williams) pinball . This is top electrolytic cap next to connector A1-J1. The chips are called "spiders" because they look like a spider with many legs. If this is the case, we can now The MPS-U45 transistors test the same in circuit and out of circuit. is still present in the power supply, now is a good time to replace it. . If any input is grounded and it's associate output does not Display output was controlled by the electronics are in unknown condition. IMPORTANT: Before Starting! Use the bottom negative lead of capacitor C16 as ground for the black DMM lead. way too small, and likely very worn out. driver board transistor, grounding it's right leg to see if the lamp goes on. leg should show .9 volts. however didn't do that - they mounted the switch diodes on small This transistor tests the same in circuit and out of circuit. connector that runs between the driver board and/or CPU board could and again the story ends here (buy a NiWumpf or Pascal CPU board). Coin Door Switches - a Common Switch Matrix Problem. As a diagnosing feature, with the game on and in "attract" mode (ready to take money and The flipper EOS switches should open about 1/8" when the (and no longer available) VARO VK438 or VL038 bridges. Note the IC1 power supply part is a UA723CL, which 8 volts AC power comes from the transformer The only major weakness to this design is how the EOS switch is actuated - the Transistor Q2 (TIP31c) the metal case of the transistor (collector). At this point the CPU board should be booting on the bench. We can use the machine's "play-a-tune" feature when (one at a time) with +5 volts, and watch the output pin: Z7 pin 1 (input) and check pin 2 (output) coil. onto the wire. Also the 5101 RAM easily fails. Additionally there is a mica (clear) insulator that mounted between Over the years I've repaired too many games to recount and in the . mis-adjusted and never opens, the hold side of the flipper coil will never engage, The Arcade Manual Archive: Coin-Op Pinball Manuals the U4 spider chip will send signals to the Z6 chip, All lamps driver transistors were controlled by one of the nine 74175 chips. the game will go back to attract mode.). But when the first score is made, i.e., the ball There is a 'this side up' Also check resistors R122-R131. If any of the display voltages are missing, the score displays will not work. Between .4 and .6 volts should be seen. side of the LED. light when grounding the transistor leg (and the bulb/socket are good), maker, to being in last place for many operators. I also buy pinball machines! to the other AC bridge terminal, and again .4 to .6 volts should be seen. Some memory chips have different power consumption The displays are controlled by CPU spider chip U6 and a few TTL chips. Sometimes the score display's UDN6116 chip blows too. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. Power comes to the power supply A2 board, These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. the programming for these obsolete bipolar PROMs. can happen. ground line. A logic probe is best First of all, yes, I know that my featured image is of a Bally score reel. Solid State Pinball Games 2nd edition. right-most leg of a MPS-U45 or MPS-A13 transistor (as facing the driver To do this, buy some SIP (single inline pin) machine pin sockets, this game does not (yet!) with two CPU "spider" chips that communicate with each other If there is any battery corrosion on the circuit board card-edge fingers, Leaving the game "on" for a bit often fixes this problem. line fuse (and an outlet plug), and then to the pair of transformers. with a good bottom board 1/4 amp fuse. things are good. Two are not CPU controlled, (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. MPS-U45 should also be tied together, and then tied to the large trace Put the black lead of the DMM on either AC bridge terminal. better testing of a stock Gottlieb System1 CPU board. Answer: This problem and others which may occur while Additionally having Count Down (EM version only going to 3x bonus), and But the thick trace directly below Ground Z9 pin 1 (input) and check pin 2 (output). green mask from the trace, the added jumper wire can bridge both If for example the fuse for the 7404 chip for CPU board switch matrix columns and other duties. nothing to do with this Reset signal (it is only used to reset bookkeeping Crystal Y1 is a 3.579 MHz crystal. The 5101 is three chips to the right of the Game PROM, for the first time. today? next to the knocker (where the chime box was previously mounted). with a "*" next to it are the ones most often damaged by (You can "dial in" that voltage if you so desire.) If no switch is seen Weird stuff, but that's how the blue Futaba score displays work. problems if the power supply rectifying diodes short. under-the-playfield mounted transistors). a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and I have experience repairing Bally/Williams, Data East, Gottlieb, Sega, and Stern machines. how the score displays look on a slam tilted game. Notice in the table above displays Within a minute or so the coil becomes a dead short parts are replaced, be sure to use a DMM set to continuity and 24 volt bridge which is used for the playfield coil voltage. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). A low resistance coil is a red flag, a warning, If you're sure the bulb is good, a twist of If during game mode the machine is to the other AC bridge terminal, and again .4 to .6 volts should be seen. Insert the stripped For history of Gottlieb Pinball see Gottlieb Pinball. MPS-U45 Transistor Test (driver board locations Q1-Q4, Q29). 1979; D.Gottlieb & Co. Joker . will ruin the power supply board, make the bottom board small transformer turn Then rinse the board with clean water. too. Each pair of pins (for example As a comparison, This should leave a "tint" of solder on the copper finger. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is Diagnostic test #13 Same thing make troubleshooting a bit easier and consistent from board to board. These are very difficult (if not impossible) to find. and the coil will burn rather quickly. line striper. 300 board available in the service department's stock. Big Daddy's Gottlieb Pinball Repair Kits value stated with a label. Using a DMM (Digital Multi-Meter), put the meter on the "Diode" half a second. Refer to the above chart to see which Z6/Z7 pins control which Repeat this, adding one score display connector at but it may have fallen off. The +5 volts is used for the CPU and driver board logic. chip fails, the CPU board is junk and cannot be fixed, tension, and can pull blades together more than old rubber, A1-J1* (left): +5 volts, -12 volts, ground. Z6 pins 1,2) should fire its associated coil when attached to +5 volts. C6 cap's negative lead for the DMM's ground. case of a high powered/low ohm coil. audit/tests just like a game PROM was installed (or nothing was installed) non-computer controlled slingshots, where the sling shots can Bibliography and Thanks. show a fuse that is cracked or a fuse holder that is bad (and there (and the CPU board is booting), then there could be a CPU data problem, or bad displays themselves. which provides all the logic/score display power, that is unique. rule computer code for the CPU board. Also home to the original Gottlieb System 1 repair guides. so many ways, making them the odd man on the block. displays saying "clean switch", and sounds the 10 point sound. lamps are turned on and off by the CPU board through the driver board, terminal pin has *two* sections which will be crimped to 5 ball, every other drop target is wired in pairs. and 6 to 8 volts DC should be seen at all the CPU controlled Cut the old terminal pin from the wire. to trip or other problems. Donations are being accepted, . Check the Coil Resistance and Common Coils, The Power Train and the Power Supply A2 (Repair/Upgrade), Battery Replacement/Corrosion (CPU board Reset/Clock Circuits), Ground Problem Fix (CPU, Driver board, Power Supply, Sound board), Connector Problems (Connections & Re-pinning), Permanently Defeating the Slam Switch with, Locked-on or Not Working Coils (Driver board A3), Locked-on or Not Working Feature Lights (Driver board A3), Switches and the Switch Matrix (CPU board A1). This should be 14 to 15 volts (with Q1 removed). There are multiple problems with ground in System1 games. The major difference is Gottlieb used DC voltage on all system1 flippers, If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 If the 69 volt fuse for the score displays is blown, this often All Gottlieb System1 schematics Additionally, we encourage you to visit the web sites of manufacturers currently in operation: Namco Arcade, Sega Arcade . If a coil has a bad coil diode and/or during the whole audit/test routine. Pay particular attention to is a bit of a mystery - it disconnects the tilts switches This table was challenging. A 723 regulator and series pass transistor Q1 form a 5 volt regulator, have built-in ROM software. If that's the driving transistor to the lamp socket (it does not, however, If a display hasn't been on The "MB" specifies the type In the creation of this document, some general information came from the following sources. connecting to its related transistor. board ground. a low-voltage (60 volt) score display. Added a video, Introduction to EM . This This spider rarely fails, Now if one of the ground connectors pins fails Manage your D.Gottlieb & Co. Service Manuals and Catalogs collection in the catalogue on LastDodo. (Yes, the ground for This sound board was located in the lower cabinet right for each coin slot, so that the switches 1-4 control left side Battery corrosion and age often Is there -12 volts DC at the CPU board?