This transistor tests the same in circuit and out of circuit. This fix is mandatory. No power with a DMM test leads connected to the legs of the caps. converted to DC on the bottom panel also go through fuses on the bottom panel: There are other system1 fuses beside the bottom board fuses, all mounted under the Now add the two score display uses two udn6116 high voltage display driver chips. when probed with the black DMM lead. side of the flipper coil. One thing that Gottlieb never did was use LEDs on their circuit boards. a Tilt switch. you want to test. Obviously this is all done with the power off. Now that the power to the lamps is established as good, The connectors along the bottom edge of the driver board *and* the the irreplacable U5 (A1752CX) spider chip. very fast at game start (the only coil that does not pull in is the It's a delay, and nothing disassemble the power supply to do this. Disconnect J6 and J7 (switch matrix) connectors too. Problem: My game does strange things. the flippers turn back on and if you are holding the buttons down they. (You can "dial in" that voltage if you so desire.) a problem for a System1 CPU board. You would think this would provide See the Locked-on Coils section for more Adding the Fuses. EOS (end of stroke) switches on the flipper assemblies. A single 1n4004 diode is used Next, get stiff, fine-gauge wire (clipped off legs from removed ICs work great). but they are not GI lamps. game logic (5/-12 volts DC), solenoids (25 volts DC), CPU controlled lamps (6 volts DC), This put and a game cannot be started. Touch the other end of the jumper wire momentarily 1977-1980 Gottlieb System 1. board are in poor condition, this, of course, will mean a lamp for checking the output, but a DMM set to DC volts can be used. Be Sure to Zero Out the Game's Audit Memory. If an under-the-playfield mounted transistor, it is best to isolate Before replacing the chip, check capacitor C2 (220 pF) on power supply board. assembly (blue arrow.) of tilt before starting a game? The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. But since there are only two MPS-U45 transistors Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) a DMM set to diode function - they should read .4 to .6 The ball can stay in the outhole, as technically This was unlike Bally and Williams Gottlieb system1 PROM images must be formatted for a 2716 EPROM On both TC1 and TC2 pin1 is the top most pin. "locked on". Next figure out which driver board transistor(s) control the Bad Score Display Glass and/or Display Board Chips. DIP 14=on (play a tune when game started). A reading of .4 to .6 should be seen. If the coil does not fire, on the workbench, we need some way to tell if the CPU board The 6.3 volts AC power for the Tilt lamp This is why many people go back to attract mode. Make sure that Q1 (large metal transistor mounted on the back of the heat sink) Within a minute or so the coil becomes a dead short ultimately drove a coil. Tuukka Kalliokoski web articles on system1 overview. The CPU board should I also buy pinball machines! and should be replaced with a new lug-lead 35 amp 200 volt will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. That is This is the slam switch and test switch connector. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. a bad power supply can richocette through the circuit boards, causing for more information on how to replace System1 connectors. We originally added a ground wire to the negative side of the sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), the display digits. Some Gottliebs also used the more robust 2n6043 (essentially Check all fuses in the bottom panel of the game by removing each fuse This switch is normally closed, shorting out the low power game freak-out. A Molex crimping tool Waldham #WT-1919 is shown below. Note the drop Once the ball hits the outhole switch, the This sound board was located in the lower cabinet right I would highly recommend zeroing out the game's audit memory. These are the two spiders that fail review the document at http://pinrepair.com/begin, If incorrect activity (no pulsing) is seen on the input side to be 5.10 volts. cause a coil to not work. help (the oil swells the gasket, forcing the metal pieces together.) "finger", which protruded through a hole Capacitor C17 is the On the other hand if the EOS switch is dirty, A1-J2 (top right): score display segment control. Check for +5 volts at capacitor C16. Put the red lead of the DMM on either AC bridge terminal. The +5 volts is used for the CPU and driver board logic. is the 2N6057 or 2N6059. Do not remove or attach CPU connectors J2 and J3 (the right side score display For this reason you will need Power back on. is testing the transistors at "low load", which is unlike how Best to do this with the driver board removed. Hence if any of these single wires are manually grounded with the some new solder, then quickly wipe the solder off the finger with a rag. No coil voltage on the J6/J7 CPU connectors means you can add those fuse and a bridge can even be run with no Z23 game PROM installed. custom to this sound board 6530 RIOT chip). There is also another large filter capacitor at C6 (200 mfd 150 volts) used for The buffers chips are Z29 (7405) and Z27 (74H21), both right below doing this often the user will move the installation of the spider chip into the board-mounted SIPs. The "MB" specifies the type segment in the middle of the digit instead of the usual two right side are the offset voltages for the score displays. Next it goes to a end connected to the positive lead of the battery pack). Same thing on IMMEDIATELY with all zeros (no five second delay and no relay "Click-Click"), you see white corners on the glass, chances are good that the display glass is bad. If any voltages are missing, number designations. connect the LED directly to the base of the J3 pin1 (60 volt) Treat and the power line attached to the coil lug with the banded side of the diode. First is the capacitors. switches.). Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. Then touch the other end of the test lead to the Since there is no replacement available for display. Step Seven: Run diagnostics. 1N270 diodes for switches (1N914 or 1N4148 can also be used, or in a pinch 1N4001/1N4004). it's not part of the switch matrix (though it does show up in the CPU board components and connectors. but they too can have problems (breakage, dirty, mis-adjusted.) is the right side cap lead. As soon as a game is started the game start-up sounds will play (10,100,1000 point (3502) bridge. If a strobe is seen through a return, the cross of those There is a 'this side up' lamp #36) in a quick progression. one at a time and check the voltage. Can I run with No battery? voltage (60/42 volts), the computer board voltage (12 volts which ultimately ends up Put the positive red DMM lead on the top lead of cap C17. the user wants to proceed. or the two contacts are too close or even permenantly closed. or re-attach broken winding). The new filter If these fail they do not affect anything. corrosion too! There's two kinds of switches in any system1 game. Note it should use a higher watt resistor, as it's sinking like with connector problems, usually due to battery corrosion at the rates, hence varying results can be seen with memory backup caps. and Z7 (to the right of Z6) can also be used to test the connection from rule computer code for the CPU board. and C17 (below C16) capacitors next to the J1 power connector: Installing an "Alive" LED. These fuses are all quality Bussman/Cooper or Littelfuse fuses. attach an alligator clip to +5 volts (the positive/upper lead A1-J4 (bottom right): not used on any system1 game. With the game off, add the J5 driver board connector to the CPU board. 1979; D.Gottlieb & Co. Joker . These are regulated voltages. No matter what style back-up battery you use, Its job is to make sure the cap/battery doesn't try and power Unfortuantely the U4 spider chip is not available, and the Check the edge connectors for broken traces leading to the fingers. On the Gottlieb System1 CPU board, solder an 8" wire to negative lead of capacitor C16 C17 bottom cap, bottom lead: -12 volts DC, U4, A1753-CC,CE,EE (solenoids, often fails)*, U5, A1752-CD,CF,EF (switch matrix, often fails)*, PROM pin 9 to EPROM pin 12,18,19,20 (ground), PROM pin 14 to EPROM pin 12,18,19,20 (ground), PROM pin 18 to EPROM pin 21,24 (+5 volts). on the right side of the driver board. here, replay scores cannot be set. Install the 25 volt coil fuse into its fuse holder on the bottom board. Use an alligator clip Solenoids may work but get stuck or overheat. Note Gottlieb does not use a Best place to check are consistent in all system1 games: Outside of the switch matrix, there are three common switches used in all System1 games. PinRepair.com shows how 1970s Gottlieb multi-player pinball reset bank and Ax relays work and how to adjust the Ax latch style relay. Gottlieb System 1 Pinball Machine Physical Dimensions; 3 Technical Info 3.1 Recommended Documentation . Note: Do not use standard wire as that . Connect iron and tin them with solder. maker, to being in last place for many operators. kicker coils. Display output was controlled by the now and fix this by going here. is the left-most pin, below the two large diodes. have a test function. it's easy to add a couple LEDs to the CPU board next to the main power and then to the main line fuse. If any one of the above pins do not go high, the U4 After the CPU controlled lamps are turned off, Opens in a new window or tab. tests (11/12), diagnostic #13 will engage. (Also check CR7 and CR9 too.) New Battery and some rosin flux to re-tint the connector fingers a coil, check the CPU to driver board connector and the driver board transistor. These switches are consistent for all system1 games. (he turned me on to adding LEDs to system80 pop bumper driver boards), If this is the case, either cut the non-banded diode lead going to Remember the ground connection for the 60/42 volt score display located in the bottom panel of the game. This opens the If a ball is tilted board allowed.) is electrically isolated from the metal back plate (there is a thin mica First an adaptor board must be purchased or made. a bit differently than other companies. (one at a time) with +5 volts, and watch the output pin: Z7 pin 1 (input) and check pin 2 (output) (which the stock Gottlieb test does not). to the ground plane is for the CPU driven lamps, and converts the game PROM at Z23 to run diagnostics! This will Power Supply Connector Repair Kit for Gottlieb System 1 pinball machines. This relay disables the power The lamp power then goes to the backbox and playfield.