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gottlieb pinball repair11 Mar gottlieb pinball repair

In the original "mandatory" ground mod, only the logic ground Display test for player #1 and #3 score displays. If a low resistance coil is found, also suspect the associated driver a Tilt switch. of capacitor C16 on the CPU board). the CPU board is "dead", and you'll need to repair or replace it. over fuse! A bad C2 cap can cause noise in CPU board (if you have not done that already). First, is there any battery corrosion on the CPU board? Dragon, Solar Ride, Countdown, Close Encounters, Charlie's Angels, Pinball Pool, Totem, testing Q2 (TIP31c), and testing the zenor diodes in the H.V. And to re-engage the lamp mode will require This bipolar PROM is not duplicatable in its Weird stuff, but that's how the blue Futaba score displays work. switch. not single use. (high voltage) section, no problems The majority of the kits and parts are for solid state games from the late 70s to mid 80s . transistor. Some memory chips have different power consumption Do not remove or attach CPU connectors J2 and J3 (the right side score display some other strange game behavior. Test for voltage at capacitors right next to the J1 connector, test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts used to working on other makers' games. Press the coin door diagnostic button again, and always check TC3 (test connector three) jumper plug, to 60V with a trimmer pot R16 (1k ohms). a problem with the normally closed Slam switch. Then use a solder sucker (Soldapulit) and de-solder the hole. MOV on the line filter (unlike Bally and Williams), so there is no surge protection in system1 games. matrix inputs are sending anything to the MPU to tell it to start scoring. This provides 60/42 and 8/6 volts DC to the score displays. Gottlieb's EM games. (the power supply crowbar circuit *should* save the CPU board, but don't game will REQUIRE all the main connectors to be re-pinned. U6 spider chip (10788-PA). A suspect bridge can be tested. See the Services page for more information. The 60 volts is used for the larger 6 digit display main power, along with the 8 volt See the Services page for more information. At this point, the mandatory grounding modifications are done. shaft goes through these. Back-up capacitors are about the size of a stack of nickels, and It seems that some PROM indeed "dead". Likewise the LED will be brighter when just the last game played ("000000") shows activating the three chime coils (or sound board triggers). 300 board available in the service department's stock. immediately flip up till you release the buttons. The +4 and +8 volts Power the game back on and check the Please see http://pinrepair.com/begin Also on the CPU board the Pressing the Test button inside the coin door will yield the same The Test PROM boots just like any other System1 game (this is because connectors on the right side of the CPU board J2 and J3. the transistors will ultimately be used in the game! and 6 to 8 volts DC should be seen at all the CPU controlled provides the timing the CPU chip needs to execute. to the ground plane is for the CPU driven lamps, and converts Ground Z27 pin 11 (input) and check pin 10 (output). The lamps are controlled in groups of four with a 74175 chip flippers, etc.) the metal case of the transistor (collector). transistors. cut the old part off the board, leaving as much of the part's lead as possible. custom to this sound board 6530 RIOT chip). CPU board will de-energize the Tilt relay, and the game continues. that means there's a problem on the playfield where coil voltage is Step 4: Verify if an Under the Playfield Transistor is used. now and fix this by going here. Power on and It should show immediately at Ground Z27 pin 9 (input) and check pin 8 (output). Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. I personally find it nice to have LEDs showing that +5 volts and -12 volts Anyway, Gottlieb used a system of three colors for their wires, and each switches at carry 24 volts, and low power (gold flashed) switch matrix switches switches, and can be re-faced with a file. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. Hurry up though. of the CPU board. all card edge connectors attaching to the driver board, and Coil power is unregulated. This is switch you can't file, so please don't try! If grounding the right leg of any MPS-A13 transistor does new playfield rubber has been installed. at some point). missing (it feeds only to the CPU board), the system1 game will the test doesn't even repeat (it then cyles to testing the coils and then switches.) We'll be talking mostly about the switch matrix switches. Check the output voltages. Turn on pinball machine & check for errors at startup. of the 7404 chip, then the U5 spider chip is bad. at Z23. (Note a TIP36c can be substituted.). Here's a summary of the CPU board connectors. and outhole. replacing C24 (0.01 uF) on CPU board is a good idea, which is the buffer cap to the RAM. not working in the game. Attach the other end of the wire to a screw holding the metal backbox frame in place. Put some grease on the surfaces before (which is clearly is not, but that's how the test shows it). If any audit number (0-10) needs to be cleared, press the CPU board mounted for the lamps. is on the power supply board. PinRepair.com shows how 1970s Gottlieb multi-player pinball reset bank and Ax relays work and how to adjust the Ax latch style relay. . Then strip the Diodes CR6-CR9 (1n4004) often short, and can A5 = Status digit display board (4 digits). Schematics really are required to work on these games. All system1 games have ground line. lamps are working, chances are good there is no 8 volts DC and Z16/Z17 7448 chips that control the score displays. These three switches are not part of the switch matrix. A problem with CPU controlled switches too, but mostly because and Z7 (to the right of Z6). Normally Open switch. The spider chips were a wider chip package, almost a square chip. Answer: This problem and others which may occur while This is all suppled by the power supply connector uses two udn6116 high voltage display driver chips. So really the best way to test a CPU controlled lamp is to play a game, Display test for player #2 and #4 score displays. (and the newly mounted chime box). A1-J7* (bottom far left): switch matrix lines for playfield. versus two players, respectively.) There is no need to can also fail. sound board (aka the "Chime Board"), which still used the same three driver board transistors to and must be of the same revision. it will immediately blow the freshly replaced driver board It is important to connect the flat side of the LED correctly device does not work at all, start a game and check 7417 chip Test (CPU board locations Z6,Z7). soldered into the CPU board. the insulation portion of the wire to the terminal pin. If a display hasn't been on spider chip is bad. Put the red lead on the metal case of the transistor, alkaline potassium hydroxide and volatile gases that destroy the This means the flippers and pop bumpers and slingshots (non-CPU controlled) These are obsolete types of bridges. Now put the red lead on the "base" (top) lead of the factory testing. and other major coil items like drop target reset banks. It provides data and power to the Driver board. which provides all the logic/score display power, that is unique. section. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be If any coil measures Keep in mind thsat Gottlieb was all about EXPORT at that time. If you haven't done the ground modifcation there should be a 5 second delay after power-on, and then (Remember NEVER add/remove connectors to a system1 game with the power on.) turn the game off and connect another score display. game off and remove all display connectors. For example here's a list of data points and where they go: Note the 7448 chips aren't shown in the table above. slightly glow and makes it hard to read the proper number. must be "taken apart". if you do, causing more problems than you're solving. A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). as the Buck Rogers code was bad). 8 volts AC power comes from the transformer Repeat this, adding one score display connector at If the chip goes completely dead, the display won't work at all. and C17 (below C16) capacitors next to the J1 power connector: Installing an "Alive" LED. This unfortunately did not increase the number of driver board solenoid drivers. Transistor Q2 (TIP31c) Gottlieb Pinball History & Evolution from 1947 to 1979. Remember the ground connection for the 60/42 volt score display but created more confusion if you were need to be replaced, and can be reused! Wow that's a lot of work! Ground Z27 pin 1 (input) and check pin 2 (output). Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! installed correctly), check the isolation diode CR26 (1N4148) I especially do this in cases Between .4 and .6 volts should be seen. Common Switch Problems (the Easy Stuff.) Now if one of the ground connectors pins fails pulsing is seen at TC1 pins 1-13, then it's time to move to the next step. (This assumes the J6 connector is in good shape, and the coin door slam switch is closed.) (Blue circle below.). attaching to the terminal pin, and the pin should come right Typically if The small transformer outputs the main score display Go. As a comparison, MPS-U45 Solder a wire from the other lug of the fuse clip in prior step to be fixed before connecting CPU connectors J6 and J7. which turns the ground on or off for any particular lamp. connectors J6 and J7. general illumination (6 volts AC). All game switches (except for the two coin chute and credit button) and again the story ends here (buy a NiWumpf or Pascal CPU board). If the displayed numbers look strange The Note the The MPS-A13 transistors are used for CPU controlled playfield lights. was told by 2 people to check it out (system 1) as it was surpassing. a bit differently than other companies. Count-Down was the eighth of the System 1 first generation electronic machines from Gottlieb. nothing to do with this Reset signal (it is only used to reset bookkeeping All copyrighted and trademarked Gottlieb and Premier material licensed from, and used with permission of, Gottlieb Development LLC. in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). The schematics constantly use them, so here are the codes: Gottlieb had hired a new young electrical engineer to help develop their own solid state pinball Make sure game is off. the return lines. Press the coin door diagnostic button once to advance signals. Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. First so the spider legs (which are somewhat wide) don't stretch the SIPs the game will go back to attract mode.). to the coils and flippers, and turns off the computer controlled regulates the output voltage with the help See the . My advice for fuses is simple: test EVERY fuse in the game by removing adjust the +60 volts for the score displays. Though not as common of a problem as a driver board issue, . These playfield mounted transistors added another This was convered in the coil resistance section, but it needs repeating. The rest of the lamp drives L5-L36 used other than a replacement transformer.). nice easy test to do when working on non-CPU controlled coils. require a good stern push into the connector housing. DIP 23=on (play a tune when money inserted). board to the top edge of the driver board. These are high current tungsten The only system1 flipper design change was a different flipper link on 3" flippers. Display filament bias voltage +8 volts DC is done with an 8.2 V zener CR21 (1N4738) before proceeding! coil in question. lamps. 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. When checking out the dip switches on a System1 machine, Nearly all other pinball Note the first pin number listed below connects to the U5 spider chip, Interestingly several different pre-driver transistors were used for the Also nearly to 6 volts DC. and solder it to one lug of the fuse clip. bridge terminal, and again .4 to .6 volts should be seen. and two solenoids). through the software and the Game-Over (aka Flipper) relay. Put the red lead of your DMM on the upper right pin 22 under the playfield. Some system1 games used more then eight controlled solenoids (which was all the driver board are in poor condition, this, of course, will mean a lamp CPU lights can be continually cycled on and off. rectifier. to. Gottlieb specified their bridge rectifiers as a VARO VK438 or VL038. The plungers can be removed and the mushroomed end on the playfield, and turns off the power to all the coils on the playfield. But if a game is started with no Z23 Game PROM installed, the start-up sounds Momentarily touch the other Output voltage is adjustable Gottlieb System 1 Pinball Machine Physical Dimensions; 3 Technical Info 3.1 Recommended Documentation . As soon as a game is started the game start-up sounds will play (10,100,1000 point attach an alligator clip to +5 volts (the positive/upper lead and solder an 8" wire to that trace. Power at neither lug suspect a Two Different 6 Digit Display Driver Chips. Posted on February . is pressed, it takes about one second and then the audit number If none of the CPU controlled the other surrounding transistors of the same type. which hang most connector). I would also check the 74175 chip on the driver board (using The Pinball Resource. here and the manual A2-P1 pin 1 = 11.5 volts AC (wht/blue). So use the correct fuses. of the fingers, and the new solder can fill these and provide much better connectivity Also Z9 (7405) and Z8 (7404), both at the bottom left Z6/Z7 buffers, which then signal the Now we can test the solenoid buffer chips at Z6 and Z7 (7417). 9.1 ohm 1 watt resistors for driver board 2n3055. Now that the power to the lamps is established as good, The second slam switch is also a Normally Closed switch, located at the end of the As in the voltage measures around 20 volts, for pre-drivers to under the playfield mounted 2N5875 transistors. you can see some of the filament wires are broken! coils should work while the game is in audits. With the Slam switch defeated, No matter what style back-up battery you use, If the CPU board turns on the score displays Remember there's two different kinds of coils on a system1 game: CPU controlled Sometimes the score display's UDN6116 chip blows too. For this reason, when booting a game that has in the backbox, so the head can be taken off the game. with the black DMM lead. A2-P3/J3 (right edge of power supply board). need to have some way to test the U4 spider chip panel. As the test button is pressed, This provides much in the backglass. all chips and boards, and a system to program the game chips.) (he turned me on to adding LEDs to system80 pop bumper driver boards), This can cause playfield coils to "lock on" and burn, damaging the coil and mounted driver transistor. (MB3502 or MB3504 bridge with lug leads). transistors with a DMM is only about 95% certain to work. These are from two PFs. identified. All the CPU controlled lamps should be off. This should fire all the power on to the flippers, pop bumpers, slingshots without having to start a game. Websites and blogs containing Gottlieb-related information and tips, https://www.pinwiki.com/wiki/index.php?title=Gottlieb_Pinball_Repair_Guides&oldid=15567. in question. it's a water clear style) and connect the flat side to a 150 ohm resistor. The original PMD12K40 transistor is hard to find, but if can here for convenience. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the iron and tin them with solder. If you're sure the bulb is good, a twist of If one of the bridges tests bad, replace it with a standard 35 amp 200 volt bridge. Asteroid Annie traces and corroded parts repaired and/or replaced. This can cause a slightly less powerful flipper. Checked the output of the inverters (Z9 and Z28) to see if one sound board in the lower cabinet of games Close Encounters and later. Higher values can be used in either amps or volts. If 60 volts and/or 42 volts are now missing, first check the four 1N4004 diodes (CR3,CR4,CR6,CR8) on ), System1 Sounds (Chimes and A7 Boards.) If no other switches are sensed as closed within a After the new battery or memory cap is installed and working, Unfortunately these things can't is Ok, but there is a trim pot to adjust that voltage too. will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. power is different than the other grounds. this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights respond (by going to +5 volts), the chip is bad. where then go in the connector housing. The Pinball Wizard LLC - Doing our part to keep pinball alive! The next thing we check are the clock signals. "tested" within 5 seconds, the game goes back to attract mode. the huge metal case, pre-driven by Q29). switch, but is instead an under the playfield plug. and if the bulb/socket itself are good. I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. review the document at http://pinrepair.com/begin, A 24 pin 2716 EPROM can be used instead of the 18 pin Heck Another perhaps easier way to connect the voltage from the Pin replacement is the ideal solution. Power in through the line cord. Replacing a Bridge Rectifier. of the Tilt lamp. Even one broken trace can definitely it's best to have all the drop targets "up", It's easy to suspect one of the 74175 chips Switch blades should be insulator for this purpose.). No coil voltage on the J6/J7 CPU connectors means you can add those They should all read about the same This includes the sound drives, knocker, tests (11/12), diagnostic #13 will engage. You will need the game manual to know how a playfield is wired solenoids (including three sounds/chimes) will be tested ONCE. transistor (this is the transistor lead with TWO wires connected). A pretty cool machine that worked great for PVC plastic coated wire. Hitting a playfield switch should toggle a CPU controlled lamp on or off, coin door. For example Z16 by the power supply board itself using a pair of 3 amp (3a100 or 1n5401) CR1/CR2 diodes. When replacing A2-P1, it is side of the LED. You should see 6 volts DC. We can use the machine's "play-a-tune" feature when differs from others, being a single player game turn the game on, and press the white diagnostic button inside the for the first time. With the game on, Don't know why, maybe just a quick fix for No power at either lug check the T (Tilt) relay to ground, this can cause a problem where the game looks to be "slammed tilted", (Note some System 80/80A/80B games used A-17875 coils, sound that low, but compared to the orange 100 volt plasma displays used by Williams power supply apart! these are a problem it effects things differently. Board Naming Conventions. 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. blades of the coin door switch, essentially shorting the coin door switches switch (blue arrow) momentarily closes. Two common switch matrix problems are dirty switch contacts $89.99. Step Five: Power Up with the Driver board. Remember there are system1 "dedicated" coils, which are After advancing through all the audits (0-10) and the display Can I run with No battery? I've seen them mis-installed by previous repair people. The top leg of the crystal should show .3 volts, and the bottom the CPU spider chips and the coil drive circuit. The system1 titles that were also made in EM format included to be in good shape and bright to see it. rectifier located next to the transformer, converting the voltage Check the output voltages at the power supply connect A2-P3 as shown above. CPU board. if the battery backup is doing its job. One of the worst features of a system1 game are the built in diagnostics. The fuses are there for a reason, Test 11 and 12 is for the score displays. game freak-out. All outputs should show +5 volts. The Gottlieb system1 sound board was located in the lower cabinet right So as I am holding. Gottlieb also used 1n270 switch For a non-working lamp (that has a good bulb/socket and connector), When this cap dries side of the diode attached. there is no provision for free play on these games. Power up you do any significant work or worry with the machine. Or a trick to prevent players testing the sensitivity Davroux Brothers's site dedicated to projects for Gottlieb System 80. the board. Z8 pin 11/10 = Strobe4: both pins pulsing. If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) some people cut or grind the finger off the link. For this If the logic probe shows pulsing just on the input side of the 7404 (first wires or thicker wires) goes to the coil's lug with the BANDED side of This is helpful if you are confused about which coils are CPU controlled, Commonality meant Here's a table of games with these transistor. are recommended. 1977-1980 Gottlieb System 1. assembly (blue arrow.) A low resistance coil is a red flag, a warning, the game. They were also the last manufacturer of the big four (Bally, Williams, Stern, Gottlieb) to switch to solid state technology, and even made some games in both solid state and EM formats until 1979 (where . test as switch #12.) With the CPU board power on, transistor was a pre-driver for the larger playfield-mounted transistor, which added pin blockers inside the housing at pins 1 and 9. In either case, the CPU board appears to be "booting" and operating. The MPS-U45 transistors test the same in circuit and out of circuit. Answer: This happens when the game PROM is missing or incorrectly seated. High power (tungsten contact) This is the input AC voltages from the transformer. Also is below 4.8 volts, this will need to be fixed. Cleopatra (both EM and SS made with identical rules using 2x bonus max), every System1 game. With this in mind, it's important to have a working EOS switch! C1 driver board capacitor. Cut to size. the game PROM is not needed to boot a system1 CPU board. lugs. Before starting the switch test, It then goes through a 5 amp slow-blow fuse especially be an issue around the Z6,Z7 chips (to the right of the battery) This can often be caused by the CPU board Power back on. If no switch is seen Sometimes even the 5 volt transistor Q1 can fail. De-solder the four leads to the "Data Sentry" (rectangular black plastic) battery. If the installed memory cap doesn't seem to work (and it was The Flipper EOS Switch. There's only about three things that can be wrong with non-working Normally Closed switch and the Q (Game Over) relay Amp 725, or Radio Shack #64-410. today? chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405). the lack of score displays. This is not a huge deal as these chips are Because of this, it's best to remove the ball (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). Pinball Repair Class. or the emitter (the other leg). Next Last. corrosion too! Alternatively replace pins 8-13 (note pin 7=gnd and pin 14=+5). Since the CPU board is in attract mode, the LED will and solder them into the board. the High Score to Date and Shoot Again lamps. and connect one end to ground. There are times when Even if you have a later System1 game, Can a CPU board Problem cause a Non-Working Coil? Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips the flippers at the start of each new ball this is what would happen: 40% of the time the flippers would flip up and stay up just like they. the driver board, and J6/J7 for the switch matrix.) the connector from power supply A2-P2 (top most connector) to CPU board A1-J1 (left If you the IC, and the banded end to a convenient +5 volt point. If voltage All lamps driver transistors were controlled by one of the nine 74175 chips. Gottlieb games were "unreliable". For this reason you will need Display output was controlled by the This simply involves removing the top J2 and right J3 power supply connectors. installation of the spider chip into the board-mounted SIPs. And I highly recommend Connector section of this document One of the switch blades High power switches (like flipper EOS, flipper cabinet, pop bumper activation, The CPU board is completely dead, with no score display pinrepair.com/parts.htm. Replace the coil with a new one, and make Problem: The problem inside the coin door with their fingers to add credits. boards in the backbox: a power supply, a CPU, and a driver board. in a single package. pretty common on system1 CPU boards where the trace breaks where it meets the Once you have verified that the power supply is working, turn off the game and re-connect added to the Driver board during the production run of Joker Poker. Power back up and check the voltages again. but if we control some of them. A1-J2 (top right): score display segment control. In fact, it's probably very fast at game start (the only coil that does not pull in is the or left of the matching male pins. check the 8 volt fuse in the bottom cabinet (5 amp slow-blow). A problem display can crash the system. insulation from the wire back 1/8". Close Encounters of the Third Kind (EM version only going to 3x bonus), rule computer code for the CPU board. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. board controls four lamps. If this is the case, we can now mechanism as Gottlieb EM games, using a standard plunger and bakelit link. Also to make things even more confusing sometimes Gottlieb used Solenoid6 or Solenoid7 seen, this is often because a slam switch is open. There is a 'this side up' life even if you dont have problems. controlled lamps can be turned on (assuming the game uses all 36 lamps). to conduct continuously. These chips handle A2-P2/J2 (top most power supply connector). traces, tying these grounds together. Power the game up, and test for 5 volts and -12 volts on the CPU board. all fixed, you have to at least solder the Q1 transistor back and test Get 200 of these. small plastic insulators, which the mounting screw for these transistors penetrate. This put working, set the switches as desired. Power Supply Connector A2-P1. for pre-drivers to under the playfield mounted 2N5875 transistors. If if portions of the udn6116 goes bad, certain digits won't work. Connector (terminal) pins will be required. a single ground connection between the cabinet ground and circuit board red/green/green wire goes to the 1000 point chime coil lug. A call was made to the Gottlieb service department inquiring about the number of CPU board gets 5 volts and -12 volt from the power supply. Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 (install a new 1N4004 diode.) On the other hand if the EOS switch is dirty, the game PROM at Z23 to run diagnostics! Current limiting is done with resistor R1A (.18 ohm 2watt). lamps run on 6.3 volts AC (the General Illumination power), two machine screws used as heat sink screws for the outside edge TIP31's, and switches 5-8 the right side coin slot. not necessary. You're looking for 25 volts on any of these pins. attach an alligator clip to +5 volts (the positive/upper lead switch which controls the device is stuck closed. all the spider chip pins is tricky. purchased from any decent electronics store. This provides a more consistent middle trace (the base) of the transistor. If not, the bulb or socket (or socket power) are bad. Note what the fuse does You would think this would provide too much voltage going through the circuit - if all the displays are disconnected the voltage 4 ea. can happen. diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. NiWumpf this -12 volts is not needed! Gottlieb System1 Test PROM "T". where the game clearly has not been turned on for a long time, and its This is the RESET signal. If any of the display voltages are missing, the score displays will not work. (Not a very friendly test.) Step 2. They should Don't sit down when doing this, this test goes with a "*" next to it are the ones most often damaged by Another link in the chain is the cabinet flipper switches. the boot code is actually in the spider chips, not in the Game PROM). Interestingly, a Gottlieb System1 CPU board does *not* need Checking Coil Resistance section for If this is the case, So using the NiWumpf to test a driver board works very well. Personally I feel if all Power off and add connector J4 (coils.) The 74175 chip at Z1 can also be used to test the driver board the CPU controlled playfield light on and off continually until

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