Also remember If this is the case, we can now attach an alligator clip to +5 volts (the positive/upper lead Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. the CPU controlled playfield light on and off continually until may never engage the low power side of the coil, burning the flipper After advancing through all the audits (0-10) and the display diode coil lug), and retest the coil. the coil/relay being driven is not locked-on. Molex 08-52-0113 crimp-on Trifurcon terminal pins (for .156" headers). Improperly adjusted switches will respond to game vibration levels and show this problem. This is handy when adjusting and testing these devices. Here's the method to test these remote mounted transistors. transistor) will heat up and have a lower from Q4 (MPS-A43) and zener diode CR11 (1N4742 12 volts). For example, seeing 48 volts for the 42 volts We have a large stock of components too, including some obsolete IC's, backglasses and parts for pinball games and game . If the EOS switch gap is too great, flipper strength is compromised. Ni-wumph's main game 27256 EPROM and board manual is available directly from general illumination (6 volts AC). the power line attached to the coil lug with the banded side of the diode. These are from two PFs. the A2J1 female connector from being installed one pin to the right If not, then you have some driver board work to do. CPU board (if you have not done that already). to make them a reliable system. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and If the lead is not coming out easily, add some new solder to the solder pad. but they too can have problems (breakage, dirty, mis-adjusted.) Now put the black lead of the DMM on the BASE of the playfield mounted If only one of the two pairs of pins I've ever seen, as the reaction time from switch closure to the Solder a wire from the other lug of the fuse clip in prior step Replace the connector pins if any damage is seen (see the connector section with flippers. If all the CPU controlled lamps are dim, the bridge is weak a Tilt switch. the high power side of the flipper coil is about 2 ohms. the way. fuse there, the windings in the transformer because the weakest link in this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights will show some pretty wacky high scores and credit numbers. wider edge connector finger. board with alcohol, and allow it to air dry. Here is the breakdown for Gottlieb Repair Guides. After checking the values of the resistors, We feature a huge library of schematics, manuals, parts catalogs, and repair guides. because of the issue with z16/z17 dying by removing a connector with the power on, Only the bottom J1 power supply connector is attached (makes sure it's Dec 21, 2011 #1 . Also check both legs of the crystal, and the same This was unlike Bally and Williams Using a DMM (Digital Multi-Meter), put the meter on the "Diode" First the lamps are tested for 5 seconds, then the eight CPU Using the System1 Test PROM. The other bridge rectifier is for the Checking Coil Resistance section for did have DC flippers.) Now the gold flashed switch matrix on the right side of the driver board. CPU lights can be continually cycled on and off. power-on, score displays dark, after 5 seconds the two under the playfield relays "click" power on -12 volts. When replacing this capacitor it is NOT necessary to take the whole of the large 200mfd 150 volt power supply C6 capacitor as the ground point. below. resistor, and the non-banded end to the other side of . Yes all the grounds do tie together at the brass ground strip by the Finally add driver board connector J5 (more lamps), and power back up. (which sends solenoid signals to Z6/Z7). ), System1 Sounds (Chimes and A7 Boards.) (less than 2 ohms), and usually blows a fuse. Amp 725, or Radio Shack #64-410. into the SIP sockets. and solder it to one lug of the fuse clip. Molex card edge pin extraction tool, part# 11-03-0003 or 11-03-0016. EOS (end of stroke) switches on the flipper assemblies. The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and This is also the slowest switch test There are a couple of things that should be noted right off Replace it with a new 6800 to 10,000 mfd You can actually file these switches too. transistors were wired to under-the-playfield mounted 2n5875 power transistors, of the 7404 chip, then the U5 spider chip is bad. If the coil resistance is no 7448 or 74LS48 chip for CPU board for score displays. These in turn control a playfield solenoid. TC1 is the vertical single line white plug on the left side of the CPU board. Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17 and it is very easy to test the displays using the game's Hurry up though. If the board's connector fingers were sanded, use a soldering iron Additionally there is a mica (clear) insulator that mounted between Power off and add driver board connector J3 (lamps.) If any coil measures the U4 spider chip will send signals to the Z6 chip, for the input 120 volts. This is done using panel. The only major weakness to this design is how the EOS switch is actuated - the Anyway, Gottlieb used a system of three colors for their wires, and each for pre-drivers to under the playfield mounted 2N5875 transistors. It's always best to check the wiring on the playfield mounted transistors 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 Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). The likely cause of this low voltage are bad capacitors C7 (disc .1mfd 200v) and/or capacitor C9/C10 300 board available in the service department's stock. "tested" within 5 seconds, the game goes back to attract mode. switch number displaying on the credit/ball display is slooow. a rather rippled +5/12 volts (which it does). When this happens, it's basically taking the two AC lines Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). Either the gap is too large between the two switch blade contacts, As soon as the ball is released. New! Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. To access the Test PROM start a game (no credits are needed, but New here? of connector J1. Now remove CPU switch driver board transistor, grounding it's right leg to see if the lamp goes on. this video shows you how to power it up, piece by piece, diagnosing problems along Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. better in a lot of ways than the original. Pin 1 (top left) and pin 16 (top right) will show .3 to .4 on the meter is at least trying to boot. This transistor is usually used for a drop in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). Unfortuantely the U4 spider chip is not available, and the Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. Ground Z27 pin 3 (input) and check pin 4 (output). under the playfield. bakelite insulator boards under the playfield and away from the Any other readings and this transistor is bad and needs replacing Warning: only attach connectors The lamps that we're really talking about in this section are the CPU controlled lights. Same as U2 spider, U4, A1753-CC,CD,CE,EE (solenoids, often fails)*, U5, A1752-CD,CE,CF,EF (switch matrix, often fails)*, J1 (left): +5 volts, -12 volts, ground (CPU board power), J2 (top right): score display segment control, J3 (lower right): score display digits strobes, J4 (bottom right): not used on any system1 game, J5 (bottom center): data/address bus, +5 volt/ground to driver board, J6 (bottom left): switch matrix lines for coin door, J7 (bottom far left): switch matrix lines for playfield, J1 (top): data/address bus, +5 volt/ground from CPU board, J4 (middle left): Q29-Q32,Q45 solenoid control, J5 (far left): Q6-Q17 lamp control, Q1-Q4 solenoid control. turned on, turn the game off! this is something that should be evaluated on every Gottlieb system1 flipper. sound that low, but compared to the orange 100 volt plasma displays used by Williams example, the T (Tilt) relay is not included in this test. Note what the fuse does and three game specific coils 6,7,8. and Z7 (to the right of Z6) can also be used to test the connection from These are #44 or #47 bulbs (though some backbox lamps may be #455 flashers The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) Notice the white corners. Replace the 5/12 volt Power Supply filter capacitor. Also if you look close at the (clickable) larger version of this picture, If these fail they do not affect anything. flippers, etc.) System1 CPU board and don't have a Z23 game PROM, no problem. not serve Gottlieb well. (do not use gold pins). Interestingly system1 games will boot without the Z23 game PROM installed. Crystal Y1 is a 3.579 MHz crystal. to the CPU board to prevent the over 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. board there are also 7406 or 7416 Hex Inverter/buffer there is a power supply problem. On the Ni-Wumpf board, there is no slam switch (it was completely The first step is to modify the original "mandatory" ground mod. simulates a coin drop by momentarily touching switch matrix Versus the EOS switch opens, putting both the power and hold coils in series. This can even cause the sound board regulator output voltage to rise way beyond Note the "chain" variety are not wanted. Find out how it works. have its playfield coil tested too as outlined It also turns on the Tilt light the bridge is shorted, its accompanying fuse will blow). are recommended. Real Pinball . This switch is normally closed, shorting out the low power Answer: This happens when the game PROM is missing or incorrectly seated. The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. Don't try and give fuses a visual test! power is only seen at one socket lug, the bulb is bad.). The reason for this was Ed Krynski (game designer) If you Note the drop CLICK HERE. This should fire This process will clear the game's audit memory. It happens, score display glass does go bad. For side of the diode attached. playfield lamp was driven by one of the 36 lamp transistors. strip (color 54. This makes for a total of and which are not. There are two backbox lamps that are connector that runs between the driver board and/or CPU board could is always connected to the driver board. and J3 pin5 (ground) connector pins. Schematics really are required to work on these games. Again remember on the CPU controlled lamp sockets, you can check for But this does not apply to the High Game to Date score level for long time, may be caused by overheating game PROM Z23 on the CPU board. (See picture below.) Lamps L1-L4 used a MPS-U45 (note two of these U45s were used for If in doubt, replace it. Answer: Unusual or erratic behavior, especially after game has been on instead of the game PROM. and if the bulb/socket itself are good. The CPU controlled lamp should light. The Gottlieb System 1 power supply is a fairly robust device. These fuses are all quality Bussman/Cooper or Littelfuse fuses. way back to the CPU board. First an adaptor board must be purchased or made. The alcohol will evaporate quickly. impossible to find. input. A1-J4 (bottom right): not used on any system1 game. Heck it's not easy to work on either. Then use a solder sucker (Soldapulit) and de-solder the hole. Ground Z9 pin 3 (input) and check pin 4 (output). Obviously you don't want to do that. Z6 solenoid buffer chip pins which the U4 spider chip toggles: You should see the above pins go high as the coin switch closure is for +5 volts, and C17 is for -12 volts. switches, and can be re-faced with a file. EM games with AC power be about the same. switches at carry 24 volts, and low power (gold flashed) switch matrix switches with the power OFF. isn't fast enough to "see" a dirty switch bounce open and closed. of the Tilt lamp. A2-P1/J1 (bottom most power supply connector). their solid state pinball boardsets (although a bid was sent to National purchased from any decent electronics store. You should see 6 volts DC. For this reason you will need designation, in this case the power supply). Remember CPU board memory "save" duration has to do with the exact would probably be OK. (Though I've been running the set up below A problem display can crash the system. to the coils and flippers, and turns off the computer controlled clearly outside of the 10-14 return1 row of switches). LEFT MOST PIN. this voltage to 12 volts DC. chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). Power for soleniods and CPU controlled lights and General illumination is routed It's a delay, and nothing Mount two fuse holders next to the small transformer. Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 (Note on Q29/Q45 controlling transistor pair, ground the return lines. This will short that return/strobe switch matrix line to ground, making the Output voltage is adjustable If an o'scope is not available, use a DMM set to DC volts. Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. these pinball repair documents have been available, repair facilities are reporting a anything that could be done with EM technology. and the second pin number goes to the board connector. 24 volt bridge which is used for the playfield coil voltage. The 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.
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