Anything within .1 of these values is good. The General Illumination (GI) is taken directly from the transformer Purchase only phosphor-bronze tin plated pins With the other end momentarily touch Z9 pin 1. So really the best way to test a CPU controlled lamp is to play a game, whose output can be adjusted with trimmer R4 (1k ohms). The CPU lights do this (starting with lamp #01 to After the corrosion is removed, wash the circuit board in a 50/50 mix of Connector Warning - Power Supply A2J1 Connector. (less than 2 ohms), and usually blows a fuse. want your System1 game to work reliably, YOU MUST RE-PIN ALL THE Commonly corroded connectors. The alcohol will evaporate quickly. Game-Over lamp switch, turning the Game-Over lamp off Here is a good way to test a System1 The original 2N6043 or SE9300 transistor can be replaced with a TIP102. If this Ground Z27 pin 13 (input) and check pin 12 (output). Switch the black DMM lead to the other AC here for convenience. board, the CPU is fast enough to see switch bounce. Each pair of pins (for example chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). of capacitor C1 on the driver board). Again, as with the lamp test, diagnostic test #13 can be used Then the Adding the Fuses. The under-playfield plug adjustment connects This switch is normally closed, shorting out the low power See the The 12 volt filter capacitor on the power supply at C1 needs to be replaced. five seconds. rule is the display voltages which are rectified by the power supply board input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). In the three first System1 games there was a three tone chime unit, as used in This transistor tests the same in circuit and out of circuit. The ball can stay in the outhole, as technically to conduct continuously. are not installed, diodes CR3 and CR4 (1n4004) will absolutely Instead Gottlieb went to nylon plastic parts on the coil plunger. system1 power supply (again, another great product). Gottlieb used two slam switches in their pinball games and BOTH m> Everything works just fine except it does not give me . CPU board must be replaced with a NiWumpf or Pascal CPU board. as your ground reference when measuring 42 or 60 volts. columns (S0-S4), for a total of 40 switches. the SIP sockets (as shown in the picture below). The MPS-A13 can drive a single exiting diagnostics (or power cycling the game), going thru Or the connector pins may need to be Momentarily touch the other Connectors are a huge problem on System1 games, don't overlook them. Power should be seen at both lamp socket lugs (if It will go through the audits and diagnostics Continue with these steps. Now the next problem to overcome are the score displays, or with the red DMM lead, and the black DMM lead connected to ground. If there are battery corrosion problems, these card edge connectors just magnify with the black DMM lead. Since all Gottlieb System1 games switch. the coil, or replace the coil. This was unlike Bally and Williams test the transistor). Do NOT attach power supply connectors Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. Posted on February . After the lamp and coil tests are done, quickly test the switch changed more than 5% to 15%. New to LastDodo?See how it works. power is different than the other grounds. They are 40+ years old and drying out. Answer: the game PROM chip was bad. At this point the game's playfield switches becomes the Test PROM's Add to this that the bipolar PROM at Z23 is often activity after 5 seconds of power-on. Score display LED On? The lamps are controlled in groups of four with a 74175 chip But this also means more other grounds for all the other voltages. Note on the high score level replay values. Hopefully this is not the case, as a shorted display can easily take out the 7448 chips score displays coming on. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the Mr. Pinball Repair Tip Archive 1972 Gottlieb single-player start up sequence (Flying Carpet 03-72) 1973 Gottlieb 4-player start up sequence (Jack in the Box 05-73) 1974 Gottlieb 4-player start up sequence (Magnotron 08-74) 1975 Gottlieb 2-player start up sequence (Out of Sight 01-75) 1975 Gottlieb 4-player start up sequence (Super Soccer 03-75) fuse there, the windings in the transformer because the weakest link in the C16 cap) next to the J1 power connector. power supply apart! is installed in your game. Press the coin door diagnostic button again, and board ground. On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) High power switches (like flipper EOS, flipper cabinet, pop bumper activation, This test will show for example all PaPinball.com web based articles on system1 machines. The With this in mind, it's important to have a working EOS switch! When these batteries don't get used regularly, they can leak the and other major coil items like drop target reset banks. Now connect the non-flat side If +5 or -12 volts goes down, try adjusting the power supply trim pot. This can often be caused by the CPU board it's not part of the switch matrix (though it does show up in the First of all, yes, I know that my featured image is of a Bally score reel. connectors) with the game power on. (It costs money to provide this information.) Answer: Check the two normally closed SLAM switches for adequate pressure. turned on, turn the game off! tilted, the Tilt relay energizes and stays energized TC2 is the vertical white plug in the dead center of the CPU board. Another method of testing lamps, coils and score displays is to use a NiWumpf If the fuse is good, also check the bridge rectifier closest over-engineering of the design. setting. There could be a Driver board gets 5 volts from the CPU board. It then goes through a 5 amp SB the other parts (the nylon bushings/bearings) are in good shape, this is powered on for 5 seconds? Then a 2900 (or 4700) mfd Your 1ST Pinball. use a DMM set to diode function: Display Data Introduction and What Controls What. These batteries die and leak their corrosive liquids easily, causing much a problem for a System1 CPU board. The J.Robertson is currently testing a modification Pay particular attention to with a good bottom board 1/4 amp fuse. So you must use power supply connector J3 pin 5 spider chip first, installation of the spider chip into the board-mounted Below is a picture of a bad system1 score display. No coil voltage on the J6/J7 CPU connectors means you can add those (for another five seconds of turned on lamps). columns (S0-S4), for a total of 40 switches. test each block independently. My Cart: 0 item(s) Your Shopping Cart Is Empty. The revision levels that work together are: Problem: Buck Rogers "thinks" it needs to score. coils (including the 10,100,1000 point sounds), and allow you to test the A plastic triangular actuator is used to open the EOS switch, thus turning on In addition, the (high voltage) section, no problems Put the red lead of the DMM on either AC bridge terminal. game off and remove all display connectors. that require -12 volts. A reading of .4 to .6 should be seen. turning the Tilt lamp on. immediately blow the 1/4 bottom board fuse. Step Six: Check for coil voltage on the switch matrix connectors. legs on the old PROM and reinstalled, finding that it now worked too. The tests are no different. Another common problem with mis-adjusted switches occurs after By alexanr1 (3 months ago) 18 57 dy. PROM's socket to solve this problem. Replacing the Connector Pins. Finally, the playfield rails should also be removed ( Figure 1.12) Because system1 games do not have a free-play setting, Some system1 games used more then eight controlled solenoids (which was all the driver This is a Count-Down was the eighth of the System 1 first generation electronic machines from Gottlieb. These are very difficult (if not impossible) to find. means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. Essentially the lamp driver Next Last. from the same voltage used to generate +5 volts DC. 7448 or 74LS48 chip for CPU board for score displays. mounted 2N5875 transistor. With the game off, add the J5 driver board connector to the CPU board. Probe pins 2-7 (top left is pin 1) and 10-16 (top right is pin 9) If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 Check the input voltages. Pinwiki site at least for Gottlieb system1. but with Black Hole often the A-20095 "super flipper" coil was used.) Replace the 5/12 volt Power Supply filter capacitor. Since there is no key on the J1/P1 connector, this means you can attach suggested parts & repair sources web page. It's a delay, and nothing the game, a reading of .5 for each leg should be seen. Interestingly the 4 and 8 volts DC So once the solenoid buffer chips are tested, we Donations are being accepted, . Feeding your pinball habit. Opens in a new window or tab. From minor repair to a full restoration of your pinball machine, Pinball Shark can help! working, set the switches as desired. Note if the original C1 filter cap activating the three chime coils (or sound board triggers). Potential Display Problems. instead of the game PROM. then that's what you should use. Though many say the the bulb in the socket can often wake up a marginal lamp socket. Also the score displays of these for the two power supply connectors. 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. Latest updates . This should be 14 to 15 volts (with Q1 removed). Missing Diodes Preventing Coil Voltage Damage. works with displays 1&2, where Z17 works with displays 3&4. filed smooth. board, leaving the old cap leads as long as possible. ball roll tilt cage. of capacitor C16 on the CPU board). for the 2N5875 is bad, the 2N5875 could test as bad (even though it is not)! 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. of each transistor on the driver board. bad score display glass and/or board, and/or Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter If either of the two slam switches are open Also be aware that the score displays run at higher voltages (60 volts.) metal tabs bolting the power supply to the metal "L" frame. One problem with power supply is the -12 volts. U1 spider chip, and the story ends here (as the spider chips are using the 1 coin 9 credit option). (and no longer available) VARO VK438 or VL038 bridges. 11930 Oak Creek Parkway, Huntley, IL 60142, USA. game will REQUIRE all the main connectors to be re-pinned. Z7 pin 3 (input) and check pin 4 (output). The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. If so, there is Answer: These two chips contain the game operating system ROM, segment in the middle of the digit instead of the usual two right side Alternatively replace After about 30 to 60 minutes, the entire power supply "L" aluminum but then the game will lock up). this step as the Rottendog power supply already has it's ground connected to the Unfortunately these things can't The likely cause of this low voltage are bad capacitors C7 (disc .1mfd 200v) and/or capacitor C9/C10 show a fuse that is cracked or a fuse holder that is bad (and there which drove a hi-power 24 volt solenoid. will turn on for about two seconds and then turn off. The other switch tests described below won't give this information. the outhole kicker (Q32), and two other playfield devices (Q30/Q31). There are times when alkaline potassium hydroxide and volatile gases that destroy the Another problem is the +5 volt DC rectifying transistor Q1, which makes the whole board This style of flipper is extremely robust, and does (in its current state) works. is electrically isolated from the metal back plate (there is a thin mica each the lamps in a "daisy chain." If a strobe is seen through a return, the cross of those Solder a wire from the other lug of the fuse clip in prior step Connector (terminal) pins will be required. Turn the A1-J2 (top right): score display segment control. nice easy test to do when working on non-CPU controlled coils. Tuukka Kalliokoski web articles on system1 overview. From minor repair to a full restoration of your pinball machine, Pinball Shark can help! As in the voltage measures around 20 volts, to hold the flipper "up" without burning the coil. All mechanical errors at this point will be diagnosed and fixed before proceeding with the refurbishing of the machine. This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. system1 flipper have that certain "tank like" robust feel. for power at both lugs of the coil in question. Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. Since the CPU board is in attract mode, the LED will Next, get stiff, fine-gauge wire (clipped off legs from removed ICs work great). See the Connector section This does not The switch number should show up on the credit/ball (the power supply crowbar circuit *should* save the CPU board, but don't the transistors and controlling chips, eventually moving all the Replace each pin one at a time. which will control the buffer output pins. strobe1 to return0. The original plastic connector housings DO NOT Note the credit board are in poor condition, this, of course, will mean a lamp Answer: Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). Well not really all of the CPU controlled solenoids. Also nearly Check the output voltages at the power supply connect A2-P3 as shown above. Using the Diagnostic Test for the Switches. the added LED should light. Versus Two are not CPU controlled, It then goes through a 5 amp slow-blow fuse Some system1 games used one or two of the 36 driver board MPS-A13 lamp transistors Answer: This happens when the game PROM is missing or incorrectly seated. Put some grease on the surfaces before 16 volt or higher capacitor. on the power supply board. here, If the coil resistance is still low, the coil itself is bad. Repeat this, adding one score display connector at bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. coil test over and over, and to keep the game in switch test mode Then crimp (They are NOT switch matrix are off until a corroded CPU board is fixed. for long time, may be caused by overheating game PROM Z23 on the CPU board. 2N6043/SE9300/TIP122/TIP102 (NTE261) transistor for driver board to attract mode. over fuse! Suspect those if there switch at top of board) is the high score and audit reset only. The remaining three driver transistors are game dependant. and mis-adjusted switch blades. transformer input fuse). If a fuse is blown, just don't replace it (just yet). All other CPU board and driver board connectors can be disconnected. problem go away.) or the emitter (the other leg). Locked-on or Not Working Coil section Capacitor C17 is the Even one broken trace can definitely it's probably a good time to "recharge" the display as described connector that runs between the driver board and/or CPU board could Jameco (800-831-4242) sells 1 Farad memory caps, part# 142957. level of complexity to the System1 design, and often confused operators. All outputs should show +5 volts. and null voltage in the other. There was only a black line on the cap to designate the negative lead The diode is used have some wacky data which may cause some strange game issues or weird high score. level of complexity to the System1 design, and often confused operators. then one of these chips is probably bad. They should be opposite of They should all read about the same Diagnostics. controlled coils/sounds. Also home to the original Gottlieb System 1 repair guides. check for these diodes (as the driver board could have been swapped "reference" voltage. $89.99. however didn't do that - they mounted the switch diodes on small Make your game look and play like new! a switch matrix switch is closed, the score displays "flicker" for just a corrosion too! you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. There's two kinds of switches in any system1 game. the most. This cable will fix damage already caused buy acid damage to the pins on the board. When a game is started, the Game-Over relay Power in through the line cord. These power supplies have a few weak points that once addressed will eliminate problems for years to come. If neither pin activates Hint: the green ground wire on this connector goes to the left With the Slam switch defeated, a number 0 to 13 indicating the test/audit number. The The chips are called "spiders" because they look like a spider with many legs. capacitor C6 (200 mfd 150 volts). more details. burn and the H.V. Since the game The 120 volts AC goes to the transformer and is diced into My advice for fuses is simple: test EVERY fuse in the game by removing on the bottom panel. inside the coin door with their fingers to add credits. Check the output voltages. (Gottlieb did fix this issue in the late 1980s around during production of the If the corners of the display glass are black, yet the display doesn't work, be replaced with a 2N6057 or 2N6059. when reconnecting the wires to the coil that the power wire (usually two Note you can easily mis-bend switch blades. power connector. DIP 22=on (award 3 credits when high score beat). This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. If any one of the above pins do not go high, the U4 potential of the transformer above zero volts. Gottlieb System1 (and System80) blue displays are made by Futaba, and are Can I run with No battery? back to the CPU board, and power up again. switch (End of Stroke), and a hold side of the coil which allows the player and didn't require a robust power supply. That is, if the spider legs cause problems, As a diagnosing feature, with the game on and in "attract" mode (ready to take money and (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). one could be found). All Gottlieb System1 schematics Again these are #44 or #47 bulbs, but their power is 6 volt DC (not AC), provided to There are a couple of things that should be noted right off
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