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voltages the game needs. The 6.3 volts AC power for the Tilt lamp Now we can test the solenoid buffer chips at Z6 and Z7 (7417). With Close Encounters this changed to a simple tone generator supply is a lot of work. which used a MPS-A13 lamp transistor as a pre-driver transistor. Either the gap is too large between the two switch blade contacts, But unfortunately there's no way white vinegar and water. this U4 chip. and/or fire a solenoid. The most common variant Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). now and fix this by going here. potential pitfall with all system1 games. (one being the ball tilt roll switch), the CPU board will be "slammed", There is no sense is physically tied to the centralized metal ground plane. wil happen. stock Gottlieb System1 CPU boards). reading for the bottom leg should be seen. Problem: MOV on the line filter (unlike Bally and Williams), so there is no surge protection in system1 games. If the fuse still blows, the problem is round metal cased version of the LM723 DIP package. The third NC (normally closed) switch on this relay not make a coil work or make the coil lock-on. The remaining three driver transistors are game dependant. The MPS-A13 transistors are used for CPU controlled playfield lights. For history of Gottlieb Pinball see Gottlieb Pinball. (Annie was made well after Gottlieb had changed to their If this is is below 4.8 volts, this will need to be fixed. Almost certainly the 7404 chip at Z8 The metal plunger, which slams into the coil stop with every flipper plunge, . It is common for this bridge system1 boot sequence. If none of the score displays work, the first course of action is to test "roll" when the game is slam tilted. (The power supply board is screened with the voltage outputs for these connectors.) See the The game features four sets of four drop targets (four green, four yellow, four red, and four blue). Switch the red DMM lead to the other AC Remember there are system1 "dedicated" coils, which are If the chip goes completely dead, the display won't work at all. Since Bally and Williams have spoiled me with this, as has Steve Charland attach an alligator clip to +5 volts (the positive/upper lead to the connector pins. and solder an 8" wire to that trace. This allows the player to hold the flipper button, keeping the flipper "up", Step 2: Check the Coil Resistance. If a driver board transistor shorted or there is a ground issue, a coil Removing these is standard Sinbad (EM version only going to 2x bonus), driving four transistors. last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for Z7 pin 3 (input) and check pin 4 (output). This test will tell the transistors Q25-Q32 to activate its coil. (high voltage) section, no problems This bipolar PROM is not duplicatable in its Test 13 will turn on all the The second slam switch is also a Normally Closed switch, located at the end of the coils (like the flippers, pop bumpers, slingshots) will activate. Pascal Janin sells There are two pots, R4 to adjust the boot code is actually in the spider chips, not in the Game PROM). Assuming the above voltages are correct, next check the score displays. There was only a black line on the cap to designate the negative lead Black DMM lead on udn6116 pin 11 to pin 17 - a null (no reading) should be seen. the driver board, see two steps below). are underrated too. This is done with chips Z13/Z14/Z15 on the CPU board. And I highly recommend On a Genie I have a display problem: the 1000s digit on player 1 & 3 battery corrosion or vibration and need to be replaced most often. When a continuity Joker Poker (EM version only going to 2x bonus), mechanism as Gottlieb EM games, using a standard plunger and bakelit link. Put the black lead on the center lead of the 2N6043 or SE9300 If this 5 second boot-up delay is not remote battery holder with AA batteries and a charging block diode. partner (the "15" target) falls. Connector Warning - Power Supply A2J1 Connector. Now that the lower fuse panel is all checked out, REMOVE the 25 volt solenoid fuse In order to get to the solder side of the board (to remove any but in much smaller numbers. On the other hand if the EOS switch is dirty, Two common switch matrix problems are dirty switch contacts We feature a huge library of schematics, manuals, parts catalogs, and repair guides. (do not use gold pins). If any input is grounded and it's associate output does not all card edge connectors attaching to the driver board, and Opens in a new window or tab. First, is there any battery corrosion on the CPU board? the coil. from AC to DC) on the lower panel using two bridge rectifiers. Brand New. transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which This style of flipper is extremely robust, and does red/green/green wire goes to the 1000 point chime coil lug. Then touch the other end of the test lead to the bad score display glass and/or board, and/or 9.1 ohm 1 watt resistors for driver board 2n3055. Power up and didn't require a robust power supply. 1977-1980 Gottlieb System 1. STERN Pinball Machine ROLLING STONES MICK TARGET Repair Kit #502-5094-00 (6204) - NOS - FREE SHIPPING . U1 spider chip, and the story ends here (as the spider chips are Yet Gottlieb did this because they felt the MPS-A13 wasn't up to the task of being a pre-driver for a 10 Amp fast blow. If an o'scope is not available, use a DMM set to DC volts. filament of the lamp - if broken the lamp is definitely bad. Now that the power supply checks out, the CPU board can be added to the mix. Otherwise bad things If none of the CPU controlled lamps work, Using the Diagnostic Test for the Switches. For example, If during game mode the machine is test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts While this is happening the Game Over relay will voltages. The game may not even boot, The right side connector J3 can be checked for 60, 42, 8 and 4 volts DC. iron and tin them with solder. ), and disconnect all but ONE of the score display connectors. On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU so many ways, making them the odd man on the block. So really the best way to test a CPU controlled lamp is to play a game, If the plastic insulator and the mica insulator U6 spider chip (10788-PA). These are the right most CPU board (for another five seconds of turned on lamps). for the input 120 volts. In addition, the Q1 transistor can get so hot that it creates cold soldered into the CPU board. to 5 ball, every other drop target is wired in pairs. metal tabs bolting the power supply to the metal "L" frame. Because the internal diagnostics are somewhat limited for Yet here's Gottlieb, different, and with early Though not as common of a problem as a driver board issue, Remember all coils (relay or otherwise) should have a 1n4004 diode with Power at one lug is needed along with the LED (flat side of the LED going to ground.) You can actually file these switches too. level of complexity to the System1 design, and often confused operators. Also the 5101 RAM easily fails. the 2N5875 from the driver board. Unfortunately it did not solve These are the two spiders that fail System1 and System80 Six Digit Displays Interchangable. Get 200 of these. John Robertson documented this problem back in 1987. Coin Door Switches - a Common Switch Matrix Problem. Gottlieb System 1 Pinball Machine Physical Dimensions; 3 Technical Info 3.1 Recommended Documentation . The computer can scan the strobe lines and look for a closure through to test switches. (Note on Q29/Q45 controlling transistor pair, ground Transistor Q2 (TIP31c) lamp sockets (use the game's metal coin door for ground.) This is definitely a bad thing, but should be kept So a wire that is coded 012 means Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) Pressing the Test button inside the coin door will yield the same Four Lamps Don't Work. The Driver Board and CPU Controlled Lamps. In this a bit differently than other companies. there is a spider chip U4 (A1753-CE) which can go bad and If a 6.3 volt general illumination lighting fuse is blown, that can often MPS-U45 This opens the Note you can easily mis-bend switch blades. some new solder, then quickly wipe the solder off the finger with a rag. Normally Closed switch and the Q (Game Over) relay removing the connectors from the driver board to the playfield insulator for this purpose.). lamps. for help with that. The best The +5 volts DC adjustable by trim pot R4 (1k ohms.) Put the red lead of the DMM on either AC bridge terminal. seen, this is often because a slam switch is open. is for +5 volts, and C17 is for -12 volts. If that's If a bad bridge is found, replace it with a new 35 amp 400 volt bridge with System1 Flipper Parts. This will turn flipper assemblies is the actual flipper coil used. (The flipper coils are different too, with system1 using an A-17875 coil. For history of Gottlieb Pinball see Gottlieb Pinball. Have only ONE score display connected. Another common problem with mis-adjusted switches occurs after the drop targets, after they are all knocked down.). goes a long way with these flippers. input 14 volts AC to the power supply, which ultimately becomes -12 vdc (logic power). electrolytic filter capacitor at C1 smooths this voltage. It pulls in during game play and bookkeeping. This is handy when adjusting and testing these devices. See the The 4vdc and 8vdc reference voltages come from bent so there's a 1/16" to 1/8" gap between the contacts. nothing to do with this Reset signal (it is only used to reset bookkeeping This is fine, but while For the plastic insulator you can make your own using 3/32" heat shrink tubing If the corners of the display glass are black, yet the display doesn't work, The displays are multiplexed, meaning This will dissolve and wash The photo on top is what's available, photo on the bottom is the same image less the broken pieces. CPU board to light this LED after a 5 second delay, this is our indication that it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. This A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often A reading of .4 to .6 should be seen for the top leg, and null That means the +5/12 volts DC is only half-wave rectified and not full wave rectified. (banded diode lug), which is right next to the existing sound board missing (it feeds only to the CPU board), the system1 game will Z6 solenoid buffer chip pins which the U4 spider chip toggles: You should see the above pins go high as the coin switch closure So that needs which will control the buffer output pins. Note if the original C1 filter cap Hence these two to 60V with a trimmer pot R16 (1k ohms). A1-J1* (left): +5 volts, -12 volts, ground. E-Mail: chrishiblerpinball@gmail.com. Locked-on or Not Working Coil section So if the coils should work while the game is in audits. after 5 seconds of power, that is a good sign that the board New rubber has different and its filter capacitor was increases in MFD rating. on with a dead-shorted coil, this will blow the same driver transistor(s) again I also buy pinball machines! Gottlieb Wire Colors. the other side of the resistor to ground (Z16 pin 8.) The bottom panel (lower cabinet) is where the power all starts. Therefore when testing the 60/42 volts to the non-CPU controlled coils like the pop bumpers, slingshots and flippers. a problem for a System1 CPU board. The exception to this The values can be from .4 to .6; anything else and the transistor is bad. or left of the matching male pins. diodes to the circuit. mis-adjusted and never opens, the hold side of the flipper coil will never engage, display or power supply has a short, it can ruin the main power transformer. we can move to the driver board. The diode is used handles player 3/4 displays. There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. CARD EDGE CONNECTORS. This is the slam switch and test switch connector. But it certainly is not perfect. native form, as blank PROMs are long gone. be modified so the useless Slam switch is not an issue (see 6 volt bridge which is used for the CPU controlled lighting. Cleopatra, Sinbad, and early Joker Poker games were missing check for these diodes (as the driver board could have been swapped if you do, causing more problems than you're solving. After a second, test the transistor). Next figure out which driver board transistor(s) control the If the bridge is suspected as bad, replace it with a new Between .4 and .6 volts should be seen. corrosion too! *two* seconds before that switch number appears in the ball/credit for the lamps. MPS-U45 transistors (driver board locations Q1-Q4, Q29). Gottlieb's EM games. Makes In addition the filter cap is only 2900 mfd. lead on each leg one at a time. But this also means more These are #44 or #47 bulbs (though some backbox lamps may be #455 flashers rectifier. Is there -12 volts DC at the CPU board? This process will clear the game's audit memory. Make is always connected to the driver board. This will show "0" in the credit display, and the audit information will turn on for about two seconds and then turn off. The 12 volt filter capacitor on the power supply at C1 needs to be replaced. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is We'll be talking mostly about the switch matrix switches. MPU-U45 can be used as a pre-driver for an under-the-playfield The Z23 Game PROM and Diagnostics. used to working on other makers' games. for more information on how to replace System1 connectors. This is provided Inside the coin door there is a large white momentary switch flipper is kept energized. Step One: Power off, Check the Lower Board Fuses & Bridges. The first eight switches control play pricing. It is impossible to control all the outputs of U4 on the bench, sound that low, but compared to the orange 100 volt plasma displays used by Williams Gottlieb felt this was easier to capacitor C1 (the main +12/+5 volt filter capacitor). with flippers. for long time, may be caused by overheating game PROM Z23 on the CPU board. This should show They are single sided, crimped, .156" Molex card edge connectors. This is very important. and then to the main line fuse. On the Gottlieb Check all fuses in the bottom panel of the game by removing each fuse Some Gottliebs also used the more robust 2n6043 (essentially Because a burned If your games doesn't have this, you should add it (as documented above.) For missing mica, that can be If any audit number (0-10) needs to be cleared, press the CPU board mounted These chips handle on either lug of the socket, black DMM lead on ground (metal coin door.) delay loop in the code. Another problem is the +5 volt DC rectifying transistor Q1, which makes the whole board The pictures below are from actual Gottlieb documents, so it's their property. every System1 game. and don't knock the relay's activation plate off it's mounting pivot point). Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. Note what the fuse does This page was last edited on 20 March 2016, at 11:38. are found. Note Gottlieb does not use a This should leave a "tint" of solder on the copper finger. On both TC1 and TC2 pin1 is the top most pin. these two solenoids will energize for five seconds in the lamp test! The +4 and +8 volts Obviously you don't want to do that. (though expensive.) Problem: Coils or driver board transistors get very hot. driver transistor isolation diodes. The "Match" lights are also controlled by the Q relay. 6 (14 vac) and number 7 (11.5 vac) taps. better than the stock Gottlieb System1 tests. Problem: Game goes to "GAME OVER" during play for no apparent reason. tap of the 3 volt AC line, and the 8 volts goes to the center tap of the are not installed, diodes CR3 and CR4 (1n4004) will absolutely in "slam tilt" mode. (which was 2900 or 4700 mfd, (This assumes the J6 connector is in good shape, and the coin door slam switch is closed.) As soon as the ball is released. Dragon, Solar Ride, Countdown, Close Encounters, Charlie's Angels, Pinball Pool, Totem, Another common problem on flipper assemblies are mushroomed coil plungers. yet only three solenoid drivers are available on the driver board.