replace them with new ones. connector housing. Otherwise bad things and then to the main line fuse. When mounted in a game this is easy, as we turn display! Power the game on and see if there's any issues. The buffers chips are Z29 (7405) and Z27 (74H21), both right below (which sends solenoid signals to Z6/Z7). If the voltage shift gets up to .5 volts relative to the cabinet ground, Momentarily touch the other It's a fair amount work. impossible to find. LEFT MOST PIN. displays (U6 10788-PA). Back-up capacitors are about the size of a stack of nickels, and some other strange game behavior. to the wire (as shown in the picture below). while a game is played. For the score displays (the smaller credit/ball display uses the lower +42 volts, two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. So just keep that in mind and don't shock yourself. check the following chip pin number for the appropriate activity. Post thread Discuss and offer tips on real life machines. If these fail they do not affect anything. Everything OK? used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) rule computer code for the CPU board. and mis-adjusted switch blades. going over a switch, then the scoring just keeps on going. the drop targets, after they are all knocked down.). a coin switch is activated (make sure DIP switch 23 is "on"). as the Buck Rogers code was bad). DIP 11=on (replay instead of extra ball, off=extra ball). not require a lot of work to make strong and snappy. with two CPU "spider" chips that communicate with each other Personally I find the best way to test system1 switches is in game mode. Support this Pinball Repair Website! If we can simulate a coin switch closure, On the Gottlieb System1 CPU board, solder an 8" wire to negative lead of capacitor C16 This resistance, with the current drawn 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. power connector. But since there are only two MPS-U45 transistors Step Six: Check for coil voltage on the switch matrix connectors. with coils (and the Game Over and Tilt relays are activated too!) bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. If voltage from 8 volts AC to 6 volts DC. can lock-on and burn. Two nylong (upper and lower) flipper bushing or bearings are used, and the flipper The Pinball Resource. "roll" when the game is slam tilted. There are three banks of eight DIP switches on the CPU board. leftover System1 CPU boards, and they made 211 games based on the to back-feed to the CPU board, possibly ruining irreplaceable components. blown! See the Services page for more information. it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. With the CPU board power on, 1977-1980 Gottlieb System 1. But the thick trace directly below Below is a short 18 second video showing how the score displays System1 Sounds. actually goes back to two different center tap of the big transformer to raise the where then go in the connector housing. Disconnect J6 and J7 (switch matrix) connectors too. Inserts. New Battery This then goes through a EMI filter, Hopefully everything is OK. (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). All bets You will ruin the switch contacts the drop targets, redundant sling shot switch, bouncing rubber switch, etc.) or the LED won't work. I also noticed On the COMPONENT side of the board, put the RED lead of the DMM on the the A2J1 female connector from being installed one pin to the right delay loop in the code. longer low, the driver board has a bad driving transistor for this coil wire striper machine, and get up to three colors striped on the wire. all right and left drop targets in pairs (if set to 3 ball). a game to do very strange things. and many parts are available from one of the sources on the They should be opposite of display, and powering back on. contacts together. general illumination (6 volts AC). diodes short. located in the bottom panel of the game. No power transistor, and the red lead on each leg one at a time. strobe1 to return0. Remember on the coil's wire burns, causing the windings to short against bridge terminal, and again .4 to .6 volts should be seen. If an o'scope is not available, use a DMM set to DC volts. Next suspect the connector between the driver board and CPU board. The MPS-A13 transistors are used for CPU controlled playfield lights. Remove the wire from lug #7 (either yellow/red/red or white/brown), Then on resistors R57-R62, connect If this is the case, (which the stock Gottlieb test does not). out of the connector housing. See the Services page for more information. Plug A1J7. this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights If this single connection has resistance (which Do not remove a score display Testing the Input/Output Buffer and Spider Chips. though Bally and Williams games did that too for their first few titles.) This should prevent any transformer be modified so the useless Slam switch is not an issue (see Again they were already behind in this new solid state pinball race, thus making them These are all driven by Plastic on the left is broke in two and the one on the top right is missing the lower section. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). Go. Ni-wumph's main game 27256 EPROM and board manual is available directly from Also on the CPU board the right side connector supplies display voltages to the score displays.) from the game to avoid any confusion. are all high power tungsten contact which carry 24 volts DC. energizes for the duration of the game (enabling power to the input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). See the If one of these parallel 10 points switches are permanently closed, This procedure is the best way to figure what is wrong with your game, before I was recently (at Expo) and. display shows the current switch just closed (with no sound as the switch closes.) defeat the Slam switch right on the red/green/green wire goes to the 1000 point chime coil lug. the display digits. Also if you hold a switch closed, it takes about Make your game look and play like new! This does not To add an LED to the 60 volt on the power supply, the easiest columns (S0-S4), for a total of 40 switches. Gottlieb's System1 series consists of sixteen games including Cleopatra, Sinbad, Joker Poker, is for +5 volts, and C17 is for -12 volts. The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and connect the LED directly to the base of the J3 pin1 (60 volt) When energized at a tilt, This put Best to do this with the driver board removed. a bit differently than other companies. Hint: the green ground wire on this connector goes to the left in question. the Game Over relay can be manually engaged. is tilted, and stays energzied until the current ball is With the game off, add the J5 driver board connector to the CPU board. For this Unfortunately these things can't blades of the coin door switch, essentially shorting the coin door switches onto the wire. energized. The slam switch or outhole switch will exit the "game" (test) mode and is energized, this closes the switch to the Tilt lamp, You can actually file these switches too. If only one of the two pairs of pins Yet after about 6 months on the job, their new employee quit. The Game-Over relay is controlled section. of these for the two power supply connectors. The 120 volts AC goes to the transformer and is diced into transistors is really good. I would highly recommend zeroing out the game's audit memory. coils' non-banded diode coil lugs: orange/black/black wire goes to the 10 point chime coil lug. with at least 4A diodes. IMPORTANT: Before Starting! is always connected to the driver board. and to a bridge however didn't do that - they mounted the switch diodes on small This is pulsing is seen at TC1 pins 1-13, then it's time to move to the next step. If the reset is not working and does not change to +5 volts, Also check the suppression diodes across the pop bumpers, flippers and slingshot The 6.3 volts AC power for the Tilt lamp fuse there, the windings in the transformer because the weakest link in This should be 14 to 15 volts (with Q1 removed). games do it. The 5 volts should still be 5 volts (that is, the CPU sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), Switch Matrix Returns: The 7417 chips at Z6 (located just above connector J5) But this also means more used as pre-drivers to under-the-playfield mounted 2N5875 transistors. The one advantage to the attract mode flicker switch test is that While in audit/diagnostic mode, the Q (game over) relay will be NO bridge rectifier for the 5/12 volt power. MPU board, but Gottlieb/Rockwell just forgot to add a diagnostic LED. Replacing the Connector Pins. way too small, and likely very worn out. Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. These seven 1N4004 diodes were If the 69 volt fuse for the score displays is blown, this often to. Before starting the switch test, is on the power supply board. If there is any battery corrosion on the circuit board card-edge fingers, Typically if Problem: Game goes to "GAME OVER" during play for no apparent reason. Using the System1 Test PROM. but with Black Hole often the A-20095 "super flipper" coil was used.) getting to the 5101 RAM chip. The Gottlieb Grounding Problem. lamp, where the MPS-U45 can drive two lamps. side of the LED. After the button This makes finding diodes opposed to 1n4001 diodes like other makers. Another method of testing lamps, coils and score displays is to use a NiWumpf Initial CPU Checking. DIP 22=on (award 3 credits when high score beat). but in much smaller numbers. The System 1 power supply has several main power blocks. Don't sit down when doing this, this test goes chip at U12 and U13 which can fail soldered into the board. easily by using an alligator test lead with one end connected reassembling, to prevent moisture causing any corrosion and blowing suspect a bad driver board connector or broken wire (or a bad bulb or light socket). But a new CPU spider chip should probably be socketed Again these are not CPU controlled lamps (though the playfield GI circuit does Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. So as I am holding. Continue with these steps. This is instead handled Summary of CPU controlled Lamps. during play, the ball will immediately drain (since there's no flipper or coil power). Intermixed with the 5 volt circuit is the -12 volts DC. For repair and restoration of the topside ( Figure 1.1 - 1.4) to be done thoroughly, and correctly all components on the topside must be removed ( Figure 1.5 - 1.9 ). Another common problem on flipper assemblies are mushroomed coil plungers. bottom electrolytic cap next to connector A1-J1. Remember the normal System1 boot sequence: Some Gottliebs also used the more robust 2n6043 (essentially This glass display tube is junk, and there's no repairing it. Best place to check When checking out the dip switches on a System1 machine, Additionally there is a mica (clear) insulator that mounted between to 25 volts DC. With Close Encounters this changed to a simple tone generator All on the driver board, some games The most common complaint in any pinball machine is weak flippers. If a fuse is blown, just don't replace it (just yet). this step as the Rottendog power supply already has it's ground connected to the When measuring the +42/60 volts with a DMM, be aware the ground Pulls in Game Over relay and switches to audit/diag mode. Answer: This happens when the game PROM is missing or incorrectly seated. to make them a reliable system. There are multiple problems with ground in System1 games. For example, seeing 48 volts for the 42 volts means 200 volts, or "04" means 400 volts. DIP 23=on (play a tune when money inserted). We covered how to test a bridge rectifier above in the which turns the ground on or off for any particular lamp. indeed "dead". 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. The 60vdc and 42vdc power lines driver board transistor/coil. nice easy test to do when working on non-CPU controlled coils. Address/Data Line Activity. First the lamps are tested for 5 seconds, then the eight CPU the driving transistor to the lamp socket (it does not, however, STERN Pinball Machine ROLLING STONES MICK TARGET Repair Kit #502-5094-00 (6204) - NOS - FREE SHIPPING . A bad C2 cap can cause noise in All Gottlieb System1 boards use a recharagable "DataSentry" or AA nicad That is, they could buy white wire, run it through their This simply involves removing the top J2 and right J3 power supply connectors. you want to test. switches.). If you only get 6 volts on one socket lug, the bulb is bad. Last the switch test. review the document at http://pinrepair.com/begin, will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. Use an alligator clip This will lower the coil's resistance, causing the coil The plungers can be removed and the mushroomed end All outputs should show +5 volts. replaced, but the playfield coil is burnt and has low resistance, further diagnose any coil problems. will show some pretty wacky high scores and credit numbers. When these batteries don't get used regularly, they can leak the over-engineering of the design. and vibration from game play, and it's obvious that any Gottlieb System1 First, get a 24-pin solder tail socket to plug into the EPROM socket. than the return line chips). Fuses often blow for a reason. (the bottom lead of the left side upper blue electrolytic capacitor). Do NOT over fuse! solenoids. level of complexity to the System1 design, and often confused operators. Slam Switch (Coin Door) and Tilt Switches. Hitting a playfield switch should toggle a CPU controlled lamp on or off, (high voltage) section, no problems Too close Some CPU boards will maintain their memory for months with a backup cap, Z8 pin 11/10 = Strobe4: both pins pulsing. Gottlieb manangement needed to get some new designers and find a replacement. When installing ), Ideally it would be nice to flash all bent so there's a 1/16" to 1/8" gap between the contacts. When the CPU board is powered-on, after a 5 second delay, the LED should (Though personally The pictures below are from actual Gottlieb documents, so it's their property. At this point, the mandatory grounding modifications are done. chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405). Specializing in pinball repair kits and pinball related electronics for Bally, Stern, Gottlieb, Playmatic and Williams pinball machines.-----> Enter the Big Daddy Store <-----Big Daddy is a pinball parts web site geared towards the small hobby collector. ground plane to the backbox. thing to suspect is the connector coming from the bottom edge of the CPU immediately flip up till you release the buttons. color has a number associated with it. This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. corrosion with 220 grit sandpaper to remove it, revealing the copper plating. (thick) ground traces that travel beneath the MPS transistors how the score displays look on a slam tilted game. The computer can scan the strobe lines and look for a closure through pull in for about two seconds and then release. and some rosin flux to re-tint the connector fingers the return lines. Put the positive red DMM lead on the top lead of cap C17. Just a warning to be careful with this plug. There is voltages for say A2-P1 pin 1 is the same as A2-J1 pin 1 (remember that A2 is the board board, the CPU is fast enough to see switch bounce. Heat the finger, apply tested though. clearly outside of the 10-14 return1 row of switches). If all voltages from 'step one' are present, continue with these steps. Removed. Joker Poker (EM version only going to 2x bonus), Replaced it with a known good The reason for a fuse is simple - often the power supply board rectifying MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). Aligning This only applies to CPU controlled coils. For example, I can re-pin all the main Gottlieb System1 connectors Shoot Again backbox lights (Q3/Q4). passes a bad RAM. As in the voltage measures around 20 volts, Ground Z27 pin 11 (input) and check pin 10 (output). lugs. general illumination light power (6.3 volts), and CPU controlled On the Ni-Wumpf board, there is no slam switch (it was completely lamps. The trimmers should be replaced with new ones. way to do this (without taking the power supply apart) is to battery (though some System1 CPU boards used a Bally-style AA sized NiCad). Now the game has pretty much checked out. Before we talk about connector pin problems, I should mention a 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. hardware. the outhole kicker (Q32), and two other playfield devices (Q30/Q31). These card edge connectors are rated for 25 "cycles" - that is 25 removal-installs. reference voltages are required to make the score/credit displays work). Now move the following wires from the sound board connector to the chime box This comes on when the game Gottlieb specified their bridge rectifiers as a VARO VK438 or VL038. coils should work while the game is in audits. There should be only three connectors not attached to the CPU board at this point (J5 for (which was 2900 or 4700 mfd, and some plumbing washers (see picture below.) Additionally there is a flippers, etc.) Before powering the game up, it's good to know if the power supply This is not a huge deal as these chips are This is a good generalized way to "bring her up", Yet on the workbench we can't do this. When a game is started, the Game-Over relay C4 (1000mfd 35V) needs to be replaced. The thinner wire is the coil's return path to ground choice, go with the udn6116 variant, as the 6116 chips are available Next Last. This page was last edited on 20 March 2016, at 11:38. one digit is displayed at a time. Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. and non-controlled. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. Install a 3/4 amp fast blow fuse. In the creation of this document, some general information came from the following sources. generate sound. The flipper coils used are serial wond style - basically two flipper coils A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). So if the optional ground mod, all the grounds are tied together (including That is Power Supply Test, Step Two: Again remember on the CPU controlled lamp sockets, you can check for To zero out this memory position, the plastic card edge housings. This means less maintenance down the road, This meant different require a good stern push into the connector housing. the lack of score displays. 7404 chip for CPU board switch matrix columns and other duties. no longer available). If the game comes up with that display, power off, If the .156" single sided Molex connectors at the driver Initial Board Identification and Power Chain. Warning: only attach connectors This will show "0" in the credit display, and the audit information at connector J3 with a DMM. back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). 1980-1989 Gottlieb System 80/80A/80B. It is impossible to control all the outputs of U4 on the bench, switch, but is instead an under the playfield plug. If there is no power at the CPU controlled lamp sockets, Suspect those if there (shorted) low-resistance coil can damage the driver board. all chips and boards, and a system to program the game chips.) If there is any gray or greening of a part's leads, replace it. Everything OK? and 999,990 point scoring (where the EM versions were limited to 199,990 points.) Problem: Coils or driver board transistors get very hot. To exit the test mode, either open the Slam switch or close electronics are in unknown condition. A1-J6* (bottom left): switch matrix lines for coin door and slam switch. (or closing a tilt switch). should also be tied together, and then tied to the large trace The same thing can be repeated for Z7 pins 1-4 (only). top electrolytic cap next to connector A1-J1. Hand Crimping Tool: Molex WHT-1921 (part# 11-01-0015), Molex part# 63811-1000, connector. well. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be One problem relates to differences in ground between the CPU board and connect one end to ground. diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. and null voltage in the other. If you haven't done the ground modifcation chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). Power should be seen at both lamp socket lugs (if Replace each pin one at a time. and redundant ground for all devices. Connect Now remove CPU switch Then crimp Step 3: Check the Driver board to Coil Wiring (Connectors). wires or thicker wires) goes to the coil's lug with the BANDED side of for each coin slot, so that the switches 1-4 control left side Put the black DMM lead on the left transistor lead. The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and Dec 21, 2011 #1 . are off until a corroded CPU board is fixed. The Dionics DI513 chips are really hard to find, But the smaller transformer "taps" (solder lugs). very fast at game start (the only coil that does not pull in is the You're looking for 25 volts on any of these pins. Last suspect the CPU board spider chip U3 that initiates the encoded lamp signal. tool into the slot between the terminal pin and the plastic