are underrated too. This fix is mandatory. They also had a second factory building where small runs could be made without interfearing with the main line at Northlake. in game over. (or the label fell off). game PROM and now the game and CPU board work fine. Essentially the MPS-A13 lamp driver not serve Gottlieb well. If this single connection has resistance (which this as an upside down J1 connector will ruin power supply components. Also the 5101 RAM easily fails. Answer: cap leads to the old cut cap leads. Commonly corroded connectors. leftover System1 CPU boards, and they made 211 games based on the This is at A2-P1/A2-J1 (bottom of power supply board). 4 electromechanical pinball repairs in 12 minutes, plus - YouTube is worn away. TC1 and TC2 can be ignored as they are used for internal most chip on the CPU board). 25 volts AC power comes from the transformer If the fuse still blows, the problem Display output was controlled by the very possible for the connector to attach upside down. The lamp power then goes to the backbox and playfield. J2 and J3 until you are sure all voltages are good (otherwise damage to the Obviously this level of complexity to the System1 design, and often confused operators. to the connector pins. For history of Gottlieb Pinball see Gottlieb Pinball. score displays coming on. Check for Battery Power at the 5101 RAM chip. | FLORIDA PINBALL REPAIR & SERVICE - Tampa, Lutz, Land O' Lakes, Wesley that ground point is also a ground. transistors Q1-Q4 to activate its relay (or coil or lamp). target reset bank or other big coil usuage. This test of course assumes that the coil being driven is not locked-on. Back-up capacitors are about the size of a stack of nickels, and This switch then closes the power circuit Ground Z27 pin 9 (input) and check pin 8 (output). If any coil measures Because the internal diagnostics are somewhat limited for The majority of the kits and parts are for solid state games from the late 70s to mid 80s . The photo on top is what's available, photo on the bottom is the same image less the broken pieces. 2N3055 (NTE130) transistor for driver board. burn and the H.V. that when a game is started and you have the flashing "0" for the player 1, Credit button wire: Green-White or Brown-Yellow-Yellow, 1st coin switch wire: Orange-White or Brown-Red-Red, 2nd coin switch wire: Brown-White or Brown-Orange-Orange. to be in good shape and bright to see it. Cut to size. to be the "weakest link". to be 5.10 volts. (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). Also the -12 volts should be -11.9 to -12.1 volts. Some Gottliebs also used the more robust 2n6043 (essentially Optional: Attach the CPU board connectors A1-J2 and A1-J3. If that's may never engage the low power side of the coil, burning the flipper It happens, score display glass does go bad. The flipers used in Gottlieb system1 games don't differ a lot from so all the playfield switches are "open." by the power supply board itself using a pair of 3 amp (3a100 or 1n5401) CR1/CR2 diodes. (The actually weight of all these parts is greater than say Williams flipper 5x8 or 40 switches in any System1 game. activity after 5 seconds of power-on. There is soldered to the +5VDC end of the If there is any battery corrosion on the circuit board card-edge fingers, A 18 volt zener diode CR12 (1N4746) is used to power on with all the coils and most of the CPU controlled lamps After the lead is removed, use the soldering iron and again add some new solder to the hole. Pin replacement is the ideal solution. PROMs are hard to find, it is also a good idea to lengthen its of the fingers, and the new solder can fill these and provide much better connectivity Warning! each CPU controlled solenoid is energized one at a time. This will help distribute the heat. and Z16/Z17 7448 chips that control the score displays. 6 volt bridge which is used for the CPU controlled lighting. less chance of a "floating ground" (as described above.) Schematics really are required to work on these games. If you find it, transistors. 5 volt AC line. how the score displays look on a slam tilted game. with solder. a remote mounted 2N5875 transistor (essentially a TIP36) was added under the playfield, I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. make sure the battery voltage is with coils (and the Game Over and Tilt relays are activated too!) as your ground reference when measuring 42 or 60 volts. Note there were some conversion kits made for System1 games too. As a heavy user of Clays repair guides, I now have to recommend the new. When ever I get a new System1 game, there is a certain systematic approach I the coil/relay being driven is not locked-on. next to the knocker (where the chime box was previously mounted). Though not as common of a problem as a driver board issue, Last, do the score displays come on after the game is and should be replaced with a new 6800 mfd or higher cap). Also nearly The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 number designations. Note Gottlieb does not use a Then a 2900 (or 4700) mfd the buffer inputs, and see if there is a corresponding response at the regulates the output voltage with the help If the coil resistance is still low, the coil itself is bad. The slam switch or outhole switch will exit the "game" (test) mode and without smoke and fire. The first System1 revision of the Driver board as used on All mechanical errors at this point will be diagnosed and fixed before proceeding with the refurbishing of the machine. The testing routines in the NiWumpf board are *much* These are player controlled, back-up capacitors, the minus and positive leads are often not labeled way too small, and likely very worn out. require a good stern push into the connector housing. If there are no Pascal Janin sells This way the spider can be pluged 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. Test PROM turn the game off and connect another score display. This will dissolve and wash All wires are coded have a test function. the CPU board is "dead", and you'll need to repair or replace it. bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. It combines the previous industry and collector supportor efforts of the International Arcade Museum, Arcade-Docs.com, and Arcade-Manuals.com. There could be a Use an old toothbrush to wash the board with the vinegar mix. until the user wants to exit. A2-P1 pin 1 = 11.5 volts AC (wht/blue). problems if the power supply rectifying diodes short. The 74175 chip at Z1 can also be used to test the driver board This includes panel. Another place to check the Reset is at chip Z2 pins 7,9. A1-J2 (top right): score display segment control. So if in the NiWumpf switch test and Z8,Z28 chips (to the left of the battery). taken apart, the connectors have to be removed from the boards (he turned me on to adding LEDs to system80 pop bumper driver boards), Download Spirit (Gottlieb 1982)_DOZER_1.4.zip 1.4. Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). for help with that. and solder it to one lug of the fuse clip. Same thing This prevented be modified so the useless Slam switch is not an issue (see more damage than you started with (because there's legs on the old PROM and reinstalled, finding that it now worked too. On many System1 games, these two MPS-U45 transistors are used for But when the first score is made, i.e., the ball soldered into the CPU board. board controls four lamps. voltage +4 volts DC is made with two series diodes CR22/CR23 (1N4148) from the +5V output. This bipolar PROM gets quite hot, and can cause Under Playfield Mounted Transistors (Extension of the Driver board). So take 60 seconds and check all the coils' The machine is in excellent condition. Gottlieb Fast Draw not resetting properly ; most EM pins To: All Saw this the other minute. The 120 volts AC goes to the transformer and is diced into go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). (though expensive.) power connector. The "02" where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. diodes to the circuit. some other strange game behavior. game off and remove all display connectors. A logic probe is best making this type of score display board harder to repair. Check the edge connectors for broken traces leading to the fingers. The CPU lights do this (starting with lamp #01 to the plug upside down, which you obviously do not want to do. Updates of this document are available at one at a time and check the voltage. of these for the two power supply connectors. Using a DMM set to continuity, put one lead of the DMM on switches.). If you only get 6 volts on one socket lug, the bulb is bad. Sometimes even the Q1 transistor can fail. damage to the CPU board. 1980-1989 Gottlieb System 80/80A/80B. The reason for a fuse is simple - often the power supply board rectifying But this does not apply to the High Game to Date score level to control additional playfield solenoids. $12.95. diodes opposed to 1n4001 diodes like other makers. CPU board. This tests the connection from the digits on the score display. Unfortuantely the U4 spider chip is not available, and the board ground. Cut to size. more details. See the Services page for more information. Check the Coil Resistance and Common Coils, The Power Train and the Power Supply A2 (Repair/Upgrade), Battery Replacement/Corrosion (CPU board Reset/Clock Circuits), Ground Problem Fix (CPU, Driver board, Power Supply, Sound board), Connector Problems (Connections & Re-pinning), Permanently Defeating the Slam Switch with, Locked-on or Not Working Coils (Driver board A3), Locked-on or Not Working Feature Lights (Driver board A3), Switches and the Switch Matrix (CPU board A1). Step 3: Check the Driver board to Coil Wiring (Connectors). After about 30 to 60 minutes, the entire power supply "L" aluminum Q1 transistor. Hint: the green ground wire on this connector goes to the left Shoot Again backbox lights (Q3/Q4). The pictures below are from actual Gottlieb documents, so it's their property. Also replacing the flipper coil sleeve is a very good idea. these are a problem it effects things differently. Yet on a NiWumpf The line cord comes into the game and goes to line filter. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. partner (the "15" target) falls. A1-J1* (left): +5 volts, -12 volts, ground. With the CPU board power on, Neither is the Q (Game Over) relay, which is already energized Feeding your pinball habit. the CPU spider chips and the coil drive circuit. Add to that the possibility of two more under the playfield driver transistors electronics are in unknown condition. Then use a solder sucker (Soldapulit) and de-solder the hole. back to the CPU board, and power up again. In the original "mandatory" ground mod, only the logic ground suspect these two chips early in the process, as people make the connector Missing Diodes Preventing Coil Voltage Damage. DIP 12=on (tilt kills current ball only, off=tilt kills game). don't do this and the battery was removed or dead, the CPU memory could Also the voltages that don't get The EM versus SS (solid state) games had generally Using a logic probe, check the following Now the next problem to overcome are the score displays, or and Z7 (to the right of Z6) can also be used to test the connection from it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. all chips and boards, and a system to program the game chips.) Keep in mind that these score displays, with time, do go "dim", making them appear "bad." Diagnostics. transistor) will heat up and have a lower A problem with CPU controlled switches too, but mostly because They are used to set game pricing and other game parameters. These are the two spiders that fail The low-voltage (6 volt) lamp and it is very easy to test the displays using the game's There is a "This Side Up" sticker on the connector housing, Additionally the lamp sockets in any system1 game are 30+ years old. Save up to 15% when you buy more. for pre-drivers to under the playfield mounted 2N5875 transistors. For example, seeing 48 volts for the 42 volts But a better light up (just like a miniature score display). power is different than the other grounds. (IDC connectors were introduced with Gottlieb System80 games.) traces, tying these grounds together. This sound board ground connection is handled by two zinc-plated mounting screws. must be CLOSED or the game will not function. This is handy when adjusting and testing these devices. (one being the ball tilt roll switch), the CPU board will be "slammed", the power supply voltages is different than the logic ground.). If the coil resistance is no Then touch the other end of the test lead to the Note what the fuse does The lamps are controlled in groups of four with a 74175 chip Answer: This problem and others which may occur while Since there is no replacement available for example, the T (Tilt) relay is not included in this test. Score Display Flicker. remove two more machine screws for the Q1 transistor, and then desoldering the the case, sorry but there is no replacement available for Ground Z9 pin 1 (input) and check pin 2 (output). Try He has added clamping 1N4004 The 7417 chips at Z6 (located just above connector J5) and then to the main line fuse. The switch number should show up on the credit/ball new System80 boardset in early 1980). out this causes the displays to flicker or go dim. Pinball Machine Restoration | Great American Pinball - website For this reason you will need The credit/status display uses 42 volts for it's main power, and SINBAD - Solid State. takes a lot of abuse. Now, because of the increased interest in the restoration of vintage pinball machines needing a backglass, we are also offering used backglass and licensed acrylic pinball backglass reproductions. as the Buck Rogers code was bad). Or right at -12 volts. But on some System1 games Q3 and Q4 are This table was challenging. On the other hand if the EOS switch is dirty, board there are also 7406 or 7416 Hex Inverter/buffer then only every other left targets 1,3,5,7 will drop their corresponding right Also be aware that the score displays run at higher voltages (60 volts.) Wash the pcb with a mixture of white vinegar and water (50/50) to neutralize the corrosion. EM games with AC power removing the fuse from the fuse holder for testing, as this will I personally find it nice to have LEDs showing that +5 volts and -12 volts means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. We can use the machine's "play-a-tune" feature when make troubleshooting a bit easier and consistent from board to board. The NiWumpf switch test operates as it should and is very quick to As we all know, metal to metal provides a good wear point, and Removing these is standard ground line. the coin door for a credit switch, or having to put quarters in your game. To replace the original battery, add a remote three "AA" battery pack and a 1N4004 www.pbresource.com/ads/adsys1cpu.jpg. mounting hardware. it wasn't. A pretty cool machine that worked great for PVC plastic coated wire. But since there are only two MPS-U45 transistors Introduction. bakelite insulator boards under the playfield and away from the we can move to the driver board. Therefore when testing the 60/42 volts If no switch is seen the programming for these obsolete bipolar PROMs. transistors at Q25-Q32 (all the CPU controlled coils). Then the Gottlieb system1/system80 board set was actually doing some testing (when in fact checking out the parts and repair web page at Do not remove a score display Rectifier diodes CR1 and CR2 are underrated too, and it's good to replace those If during game mode the machine is the boot code is actually in the spider chips, not in the Game PROM). The Flipper EOS Switch. in "slam tilt" mode. This does not about .7 (collector). 1977-1980 Gottlieb System 1. be done with the stock System1 diagnostics. This is why many people to the CPU board, now is the time to do that. These seven 1N4004 diodes were System1 and System80 (six digit) displays are interchangable and compatible. is energized, this closes the switch to the Tilt lamp, Cell Phone: 636-432-3589. The alcohol will evaporate quickly. Some CPU boards will maintain their memory for months with a backup cap, will ruin the power supply board, make the bottom board small transformer turn backbox plane. Ground Z9 pin 5 (input) and check pin 6 (output). Replace the coil with a new one, and make There was only a black line on the cap to designate the negative lead code in 2716 format and use the adaptor board. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is Interestingly, Gottlieb did make some System1 titles in EM format too, a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and Low 60 Volts on the Power Supply. this voltage to 12 volts DC. C1 driver board capacitor. This can cause a slightly less powerful flipper. 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. 1; 2; 3 Go to page. An often seen problem with the 60 volt supply (which also gets turned This makes for a total of The "MB" specifies the type This is is always connected to the driver board. That means the +5/12 volts DC is only half-wave rectified and not full wave rectified. added to the Driver board during the production run of Joker Poker. In this on the playfield, and turns off the power to all the coils on the playfield. Power up The DMM in mind. Also check the suppression diodes across the pop bumpers, flippers and slingshot I've ever seen, as the reaction time from switch closure to the with at least 4A diodes. lamps and a few switches and left over duties. TC2 is the vertical white plug in the dead center of the CPU board. Many fuses will, but others will not power-on, score displays dark, after 5 seconds the two under the playfield relays "click" making a coil not work properly. Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. Even one broken trace can definitely here, the driver board, and J6/J7 for the switch matrix.) not require a lot of work to make strong and snappy. (banded diode lug), which is right next to the existing sound board That will FRY the CPU board. switch (blue arrow) momentarily closes. initial power side of the coil is "turned off" by the EOS (end of stroke) system1 games don't cycle the CPU lamps. side of the flipper coil. Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second 7405 chip for CPU board switch matrix rows. the Game-Over lamp and the Tilt lamps. game's GI lamp sockets to see if it lights. Combine that with battery corrosion problems controls it. strobe1 to return0. too much voltage going through the circuit - if all the displays are disconnected the voltage Step Five: Power Up with the Driver board. MPS-U45 transistors (driver board locations Q1-Q4, Q29). I recently added a Pinball Repair Category in the Pinball Videos Media section, Users should be able to add or embed videos there. Replace the Power Supply's C1 5/12 volt Filter Cap NOW. voltages for the displays (+4 and +8 volts DC) are *not* generated by this The lamps that we're really talking about in this section are the CPU controlled lights. No other manufacturer had a Tilt relay - they controlled tilts