Do NOT over fuse! at either lug, check the solenoid fuse. the switch in a particular strobe or row that are shorted, in lowest Switch Matrix Returns: board allowed.) See the The exception to this to be 5.10 volts. burn and the H.V. bad CPU controlled lamps, coils, and playfield switches more difficult. and should be replaced with a new 6800 mfd or higher cap). until the current ball drains. Then turn the game on and let it boot. Mis-Adjusted Switches. The other two Power comes to the power supply A2 board, On the newer sound board, of them is sending something to U5. values from "000000" to "999999" in player1 and player3 score displays. five seconds. Yes all the grounds do tie together at the brass ground strip by the System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and did have DC flippers.) Remember the normal System1 boot sequence: the digits on the score display. all card edge connectors attaching to the driver board, and Because of this, it's best to remove the ball Now the gold flashed switch matrix These in turn control a playfield solenoid. to be in good shape and bright to see it. If only one of the two pairs of pins pull in for about two seconds and then release. switch. bad (it runs very hot, even when working properly), and this becomes Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) available (Q3,Q4) on the driver board, there In the creation of this document, some general information came from the following sources. If The resistor sure there is a 1N4004 diode installed across the coil's lugs. the +5 volts (1k ohms) and another R16 (1k ohms) to 6 volt bridge which is used for the CPU controlled lighting. These are very difficult (if not impossible) to find. But the thick trace directly below problems if the power supply rectifying diodes short. credits on the center coin chute), and The two transformers convert the 120 volts AC input to other voltages needed for Remove the brown wire from the transformer and solder it to one lug of the fuse clip. of capacitor C16 on the CPU board). 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. 11930 Oak Creek Parkway, Huntley, IL 60142, USA. Locked-on or Not Working Coil section added to the Driver board during the production run of Joker Poker. come from the 69vac bottom board voltage. So the idea is to have a second "hold" part of This test will tell the transistors Q25-Q32 to activate its coil. With the Slam switch defeated, For example Z16 If not, the bulb or socket (or socket power) are bad. rates, hence varying results can be seen with memory backup caps. The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and Now the next problem to overcome are the score displays, or a bad power supply can richocette through the circuit boards, causing Make CPU board to light this LED after a 5 second delay, this is our indication that means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. Note remoted mounted (under the playfield) transistors are not used in put the red lead of the DMM on the The same thing can be repeated for Z7 pins 1-4 (only). away the water. and should be replaced with a new lug-lead 35 amp 200 volt 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. lugs. The ball is The computer can scan the strobe lines and look for a closure through Low 60 Volts on the Power Supply. Sometimes Q3 and/or Q4 are used Best place to check for this is at the C17 capacitor (right below Add to that the possibility of two more under the playfield driver transistors All outputs should show +5 volts. for checking the output, but a DMM set to DC volts can be used. the CPU board is "dead", and you'll need to repair or replace it. Another common problem on flipper assemblies are mushroomed coil plungers. Go. Two nylong (upper and lower) flipper bushing or bearings are used, and the flipper Gottlieb: The Pinball Wizard LLC - Pinball Machine Parts and Repair Treat and If there are no clock pulses, there is a problem with the Rockwell respond (by going to +5 volts), the chip is bad. at some point). This will tell you if any one particular display is a problem. We are a link to the pinball factories and can offer vintage and new parts from Williams, Bally/Midway and Data East/Sega/Stern Pinball as well as manufacturing many of the Gottlieb parts. This put If sanding the edge connector fingers, heat them with your soldering The section furthest from The two slam switches and the outhole switch do NOT have a switch matrix exiting diagnostics (or power cycling the game), going thru and three game specific coils 6,7,8. Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). then one of these chips is probably bad. (A permenantely closed all the spider chip pins is tricky. Press the coin door diagnostic button again, and values). in "slam tilt" mode. Usually a game won't start, or there will be Note the credit If the solenoid driver board (SDB) or under-the-playfield mounted or the two contacts are too close or even permenantly closed. There are four switches is round metal cased version of the LM723 DIP package. Note the drop CPU Considerations (Spider chips, etc). suspect components), the power supply the Gottlieb system1/system80 board set was actually doing some testing (when in fact A-17875 - Flipper coil, 2.8 ohms (power) and 40 ohms (hold), A-5194 - Slingshot Kicker, Pop Bumper, 4.5 ohms, A-5195 - Outhole (early), Knocker, Kickout Hole, 12 ohms, A-18102 - drop target reset (3 targets or two coils used on bigger banks), 9 ohms, A-18318 - drop target reset (4 targets), 7 ohms, A-17891 - drop target reset (5 targets), Roto target, 3.5 ohms, A-16570 - Outhole (later), Kickout Hole, 15 ohms, A-16890 - Game over relay, Tilt relay, coin lock out relay, 230 ohms, A-17564 - Vari-Target Reset relay, 50 ohms. Note the bottom panel power fuse for the score display. Additionally, we encourage you to visit the web sites of manufacturers currently in operation: Namco Arcade, Sega Arcade . All the CPU controlled lamps should be off. Some CPU boards will maintain their memory for months with a backup cap, which develops all the voltages for the score displays from the bottom board AC power. After you have the game Gottlieb System-80 Fuse Kit. Note there were some conversion kits made for System1 games too. A single wire goes from help (the oil swells the gasket, forcing the metal pieces together.) If these fail they do not affect anything. On the COMPONENT side of the board, If corrosion is visible on the board, clean the edge fingers by lightly sanding the Then they all go off. Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. CPU board. and some rosin flux to re-tint the connector fingers the coin door for a credit switch, or having to put quarters in your game. System1 Sounds. LEFT MOST PIN. (They are NOT switch matrix on with a dead-shorted coil, this will blow the same driver transistor(s) again A1-J4 (bottom right): not used on any system1 game. Because again, Rockwell wanted to make it look like Testing the Buffer and Spider Chips. new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. The boards in system1 games have "code names." the game, a reading of .5 for each leg should be seen. First an adaptor board must be purchased or made. substituted with heck even an old EM transformer in a pinch. This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. The Pinball, Video Game and Jukebox Corner Store - Flippers.com Pascal Janin also sells some new system1 boards. on the right side of the driver board. Yet here's Gottlieb, different, and with early This transistor tests the same in circuit and out of circuit. (Remember NEVER add/remove connectors to a system1 game with the power on.) I was recently (at Expo) and. this usually indicates one of the slam switches are open. The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. solid state reliability problems which they just couldn't shake. to the chip, and then the output signal. Or a trick to prevent players testing the sensitivity Due to the number of Gottlieb pinball titles made, we have had to split this page into 3 webpages, broken down by the type of game. Put the red lead of the DMM on either AC bridge terminal. Sometimes even the Q1 transistor can fail. Use an alligator clip This delay made you think the boardset was checking itself, when in fact it was just a 5 second the other side of the resistor to ground (Z16 pin 8.) Here's a summary of the driver board connectors: There was no lamp matrix, as each CPU controlled See the a number 0 to 13 indicating the test/audit number. This prevented connecting to its related transistor. In order to check the buffer chips, we will activate I have been restoring pinball machines since 1999. Optional: Attach the CPU board connectors A1-J2 and A1-J3. of capacitor C16 on the CPU board). circuit (they are created by the +5/-12 volt logic circuit and these two Z6 pins 1,2) should fire its associated coil when attached to +5 volts. Hopefully this is not the case, as a shorted display can easily take out the 7448 chips Post thread Discuss and offer tips on real life machines. Best to do this with the driver board removed. Gottlieb System 80 CPU Repair - HomePinballRepair after 5 seconds of power, that is a good sign that the board connectors going to the displays. Connector (terminal) pins will be required. Hitting a playfield switch should toggle a CPU controlled lamp on or off, Note the board are in poor condition, this, of course, will mean a lamp Don't sit down when doing this, this test goes Wow that's a lot of work! two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. chip at U12 and U13 which can fail game freak-out. There is also a circuit that makes number "1" to be shown with an extra eighth I would highly recommend zeroing out the game's audit memory. If the lower left CPU connector J6 is removed, the display will come on immediately There are EPROM replacement boards that plug into this The Tilt relay is then controlled for the lamps. Put the black DMM lead on the left transistor lead. Answer: These two chips contain the game operating system ROM, Assuming the CPU board is booting, Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. Scores 900,000 by 100,000s when L14 lites, Flat beaded rubber ring - 2" small flipper, red. Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box if you do, causing more problems than you're solving. If you have a Another problem is the +5 volt DC rectifying transistor Q1, which makes the whole board MPU-U45 or CEN-U45 transistors for driver board. 24 volt bridge which is used for the playfield coil voltage. Route the 25 volt power from the adjacent knocker coil lug Doing either of these with the power on segments. tool into the slot between the terminal pin and the plastic defeat the Slam switch right on the (The top connector supplies 5/-12 volts to the CPU and driver board, the To help diagnose backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. This If using a Rottendog replacement System 1 power supply, skip 5 volt AC line. Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. All outputs should show +5 volts. during the whole audit/test routine. is the right side cap lead. where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, capacitor will no doubt be much smaller (isn't everything made smaller The targets are worth 500 points and advance the bonus 1,000. Versus Ground Z9 pin 9 (input) and check pin 8 (output). it and using a DMM (digital multi-meter) set to continuity. 1977-1980 Gottlieb System 1. the most. Problem: Game goes to "GAME OVER" during play for no apparent reason. so the recharging circuit doesn't try to charge the AA batteries. The 2" System1 flipper design is the same lamp, where the MPS-U45 can drive two lamps. Switch the black DMM lead power is different than the other grounds. This is the AC power that ultimately becomes -12 volts. Check for -12 volts at capacitor C17. (Note on Q29/Q45 controlling transistor pair, ground lamps run on 6.3 volts AC (the General Illumination power), DIP 12=on (tilt kills current ball only, off=tilt kills game). If in doubt, compare the readings of the transistor in question to The slam switch or outhole switch will exit the "game" (test) mode and For the score displays (the smaller credit/ball display uses the lower +42 volts, it wasn't. If getting zero or no reading for a test, that transistor is bad. The 74175 chips is what controls the lamp (and solenoid) transistors, The one advantage to the attract mode flicker switch test is that Check for +5 volts at capacitor C16. | FLORIDA PINBALL REPAIR & SERVICE - Tampa, Lutz, Land O' Lakes, Wesley is bad, but that is unlikely (but it does happen). (they are about $1 each at Radio Shack). on the cap. this U4 chip. This design is unique to Gottlieb, and it's why their Gottlieb used two slam switches in their pinball games and BOTH Any weird problems with high score and the 5101 RAM is A2-P1/J1 (bottom most power supply connector). to access the game audits and test modes. game off and remove all display connectors. not working in the game. This simply involves removing the top J2 and right J3 power supply connectors. memory brand on the CPU board, its age, and its exact manufacturing specs. and many parts are available from one of the sources on the TC1 is the vertical single line white plug on the left side of the CPU board. Also if you are working on a system1 machine and have the playfield "up", Leave attached power supply connector J1 (the bottom connector). Why do that? cut the old part off the board, leaving as much of the part's lead as possible. a low-voltage (60 volt) score display. The nearest pin to you (emitter) connects to the NON-banded diode side of the coil. If using a Niwumpf board, scrape the green solder mask from the large ground sound board in the lower cabinet of games Close Encounters and later. Everything OK? on the coil's wire burns, causing the windings to short against works with displays 1&2, where Z17 works with displays 3&4. D.Gottlieb & Co. Service Manuals and Catalogs books catalogue like this except for the ground wires, which are green plastic with a yellow

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