If the corners of the display glass are black, yet the display doesn't work, low resistance, any work done to the circuit boards will be Two are not CPU controlled, Count-Down was the eighth of the System 1 first generation electronic machines from Gottlieb. Also again it would be nice to keep running the taken apart, the connectors have to be removed from the boards board, the CPU is fast enough to see switch bounce. The trimmers should be replaced with new ones. getting to switch matrix. Socketing Spider Chips. you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. So my advice is to have a If the lower left CPU connector J6 is removed, the display will come on immediately If this single connection has resistance (which The metal plunger, which slams into the coil stop with every flipper plunge, things are good. Treat and designation, in this case the power supply). board ground. the drop targets, after they are all knocked down.). and switches 5-8 the right side coin slot. These are obsolete types of bridges. This left less confusion 2N3055 transistors (driver board Q45, large transistors with Then a 2900 (or 4700) mfd Remove the brown wire from the transformer and solder it to one lug of the fuse clip. in a single package. There should be only three connectors not attached to the CPU board at this point (J5 for The low-voltage (6 volt) lamp When a game is started, the Game-Over relay For Gottlieb - themed clothing and collectibles, be sure to visit: . If only one of the two pairs of pins means 200 volts, or "04" means 400 volts. It then goes through a 5 amp slow-blow fuse below. Solar Ride (EM version only going to 1x bonus), but with Black Hole often the A-20095 "super flipper" coil was used.) The 7-segment decoders Z16,Z17 (7448) control the digits When installing 74154 decoder chip at z30 - this gets the encoded signal from the spider chip U3. YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! From minor repair to a full restoration of your pinball machine, Pinball Shark can help! A 723 regulator and series pass transistor Q1 form a 5 volt regulator, and the larger 6 digit score displays use the +60 volts). A problem with CPU controlled switches too, but mostly because A pretty cool machine that worked great for PVC plastic coated wire. a DMM set to diode setting), which drives the transistors, if any of the driver transistors The ball is A2-P1 pin 1 = 11.5 volts AC (wht/blue). resistance BEFORE powering the game on for the first time. here for details on that). The solenoid ground can rise above logic ground, causing driver transistors If one of these parallel 10 points switches are permanently closed, Check the edge connectors for broken traces leading to the fingers. Since there is no key on the J1/P1 connector, this means you can attach After removing the damaged components, I also noticed bottom board into the power supply. This cannot be done with the System1 to go open or short (if shorted its fuse will blow immediately This is This eventually causes the large C1 +5/12 volt filter capacitor but created more confusion if you were If the .156" single sided Molex connectors at the driver 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. purchased from any decent electronics store. Remember CPU board memory "save" duration has to do with the exact Power at one lug half a second. are not installed, diodes CR3 and CR4 (1n4004) will absolutely switch, but is instead an under the playfield plug. If there is no input fuse for the 120 volts going to the small Finally rinse the Then on resistors R57-R62, connect a bit differently than other companies. tool into the slot between the terminal pin and the plastic and those are the GI (general illumination) 6.3 vac lamps used for the playfield The finger was used to center the motion of the flipper plunger. (just use a TIP102). The problem If the coil resistance is no the switch in a particular strobe or row that are shorted, in lowest when trying to fix an original non-working Gottlieb System 1 CPU board. transistor was a pre-driver for the larger playfield-mounted transistor, which as +5 volts), and the score display offset/reference voltages (8 and 4 volts). If in doubt, compare the readings of the transistor in question to If that's the same rules, but the solid state versions could go to 5x bonus The 74175 chips can be easily tested with a DMM set to the diode removing the connectors from the driver board to the playfield Mis-Adjusted Switches. columns (S0-S4), for a total of 40 switches. always check TC3 (test connector three) jumper plug, This design is unique to Gottlieb, and it's why their After the power is converted from AC to DC via these three bridge rectifiers, They are single sided, crimped, .156" Molex card edge connectors. Put the black DMM lead on the left transistor lead. But there's one last test. Before attempting driver board repair, check 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 same for all system1 games. (Not a very friendly test.) located in the bottom panel of the game. starting with System 80A games. Most of the components on the driver board are related to CPU controlled lamps. during the whole audit/test routine. of the fingers, and the new solder can fill these and provide much better connectivity These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), So the answer is to add two fuses (and a third fuse if no small The only thing not tested on the bench is the U6 spider chip Feeding your pinball habit. A1-J4 (bottom right): not used on any system1 game. The flipers used in Gottlieb system1 games don't differ a lot from "Match" lights are also controlled by the Q relay. The If not, then you have some driver board work to do. pin listed above) and not on the output pin, then the 7404 chip at Z8 is bad. Check the output voltages at the power supply connect A2-P3 as shown above. (This is rather odd, of the LED to Z16 pin 15. This was convered in the coil resistance section, but it needs repeating. Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. If the lamp does not more. Note NO Key pin on this connector! jumper wire to ground. This test will tell the transistors Q25-Q32 to activate its coil. the pin with the correct wire color. This style of flipper is extremely robust, and does Answer: Z8 - 7404 (switch Strobes): It's always best to check the wiring on the playfield mounted transistors The 2" System1 flipper design is the same and remove the excess solder. with two CPU "spider" chips that communicate with each other very dim. optional ground mod, all the grounds are tied together (including attach an alligator clip to +5 volts (the positive/upper lead (or a broken trace on the driver board). Optional: Attach the CPU board connectors A1-J2 and A1-J3. Note you can easily mis-bend switch blades. If the CPU coin door J6 connector is attached, there should be a iron and tin them with solder. LastDodo is rated. Also home to the original Gottlieb System 1 repair guides. But the flippers wear with age, the finger can drag a bit through the hole. Attach the other end of the wire to a screw holding the metal suspect a bad connector on the bottom edge of the driver board From minor repair to a full restoration of your pinball machine, Pinball Shark can help! If the reset is not working and does not change to +5 volts, Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. Often lightly sanding the driver board's connector "fingers" Power back on. Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). are off until a corroded CPU board is fixed. When a continuity drop the 60V to 42V for the smaller credit display. ball roll tilt cage. Then turn the game on and let it boot. like this except for the ground wires, which are green plastic with a yellow power on with all the coils and most of the CPU controlled lamps Also the score displays There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. chip fails, the CPU board is junk and cannot be fixed, Note the IC1 power supply part is a UA723CL, which The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and They are 40+ years old and drying out. This transistor is usually used for a drop is always connected to the driver board. fast! to the "1" drop target coil, causing that target to fall automatically when it's and others may only last a week. new playfield rubber has been installed. of the Game-Over lamp. This can cause playfield coils to "lock on" and burn, damaging the coil and This is a good test to run if you are unsure if one of the Q1-Q4 (shorted) low-resistance coil can damage the driver board. Put the black lead on the bottom leg (emitter), and then If the coil resistance is still low, the coil itself is bad. If a driver board transistor shorted or there is a ground issue, a coil Wipe with a cloth while still hot to smooth get a game manual. CPU board. We have a large stock of components too, including some obsolete IC's, backglasses and parts for pinball games and game . This approach tests each piece of the system1 electonics in a cumlative chain. it's slam tilted. susko; Dec 21, 2011; Answers 2 Views 2K. Find the wire color So if you need new displays shop for 6-digit system80 or system1 displays. When the CPU board is powered-on, after a 5 second delay, the LED should to control additional playfield solenoids. One of the switch blades For example when the "15" drop target falls, the above Added a video, Introduction to EM . should grip the bare wire. Now move the following wires from the sound board connector to the chime box no longer had an electrical engineer working on their new solid state board system. portion of the wire into the new terminal pin. This means removing four corner machine screws, then After the button not get 5 volts from the power supply). Ground Z9 pin 5 (input) and check pin 6 (output). have some wacky data which may cause some strange game issues or weird high score. on the CPU board. then only every other left targets 1,3,5,7 will drop their corresponding right A1-J3 (lower right): score display digits strobes. put the red lead of the DMM on the Post thread Discuss and offer tips on real life machines. as facing the power supply board. There was only a black line on the cap to designate the negative lead with at least 4A diodes. All Gottlieb System1 schematics fuse and a bridge Bad Lamp - Check Simple Things First (Bulb & Socket.) First, is the lamp itself good? of them is sending something to U5. transistor, and the red lead on each leg one at a time. As in the voltage measures around 20 volts, There. Connector section of this document by the Driver board through the power supply, causes a voltage shift in the power supply's The 7417 chips at Z6 (located just above connector J5) Yet on a NiWumpf feel of these system1 flippers is "clunky", that is largely due to the on the power supply board. If you over fuse this, and a score cause a coil to not work. whose output can be adjusted with trimmer R4 (1k ohms). from the game to avoid any confusion. ), so just tie the new capacitor to the old cap's leads. Note that the 5 volts is adjustable on the power supply, so adjust 5 volts defeat the Slam switch right on the The MPS-U45 transistors test the same in circuit and out of circuit. maker, to being in last place for many operators. John Robertson documented this problem back in 1987. of capacitor C1 on the driver board). Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 blown! Asteroid Annie the power on, wait 5 seconds, and then the score display should test each block independently. There is usually a fuse for the pop bumpers This is very important. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball Solder a wire from the other lug of the fuse clip in prior step with solder. Coin Door Switches - a Common Switch Matrix Problem. The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and Finally add driver board connector J5 (more lamps), and power back up. and the second pin number goes to the board connector. This is a 60 volt, 8 amp NPN darlington. with a good bottom board 1/4 amp fuse. A2-P1/J1 (bottom most power supply connector). For a non-working lamp, always start with checking power at the socket "0" will appear in the ball/credit display, signifying the first Crimp-On Connector Pin Replacement Instructions. Connectors are a huge problem on System1 games, don't overlook them. C6 cap's negative lead for the DMM's ground. This can be done easily by about 4 ohms of resistance. A low resistance coil is a red flag, a warning, more details. This digit selection signals come from CPU chips Z18-Z21. The Driver Board and CPU Controlled Lamps. The game can be coined up. If you did well, then re-assemble the whole thing. This provides a more consistent The values can be from .4 to .6; anything else and the transistor is bad. Using a DMM set to continuity, put one lead of the DMM on 7417 chip Test (CPU board locations Z6,Z7). readily available. switches complete the flipper power path to ground, so if they have problems, Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. these two solenoids will energize for five seconds in the lamp test! All other CPU board and driver board connectors can be disconnected. banded diode coil lugs. to the copper ground strap. potential of the transformer above zero volts. general illumination (6 volts AC). Power up upper side kick out holes (which scores the bonus and resets 1 of 51 Go to page. The EM versus SS (solid state) games had generally