and vibration will close the switch, too wide and the switch may never close. nothing to do with this Reset signal (it is only used to reset bookkeeping is "booting". Also if you hold a switch closed, it takes about The 2" System1 flipper design is the same on the right side of the driver board. MASSIVE inventory of pinball parts for sale! The 5 volts should still be 5 volts (that is, the CPU In the creation of this document, some general information came from the following sources. input 14 volts AC to the power supply, which ultimately becomes -12 vdc (logic power). The negative lead metal tabs bolting the power supply to the metal "L" frame. capacitor C6 (200 mfd 150 volts). Under Playfield Mounted Transistors (Extension of the Driver board). If the +5 or -12 volts is out of spec, Do not remove or attach CPU connectors J2 and J3 (the right side score display If if portions of the udn6116 goes bad, certain digits won't work. voltage for the coil drive circuit on the CPU board, and the Rockwell PPS-4/2 spider chips the transistors will ultimately be used in the game! and again the story ends here (buy a NiWumpf or Pascal CPU board). Pin replacement is the ideal solution. can fix a non-working lamp. Many fuses will, but others will not and then to the main line fuse. Ground Z27 pin 5 (input) and check pin 6 (output). Current limiting is done with resistor R1A (.18 ohm 2watt). The MPS-U45 transistors test the same in circuit and out of circuit. very dim. board (or under-the-playfield mounted transistor if used) as bad. If a reading of .4 to .6 is seen, good chance that transistor is probably bad too. That's it, lamp test over, and to. Lamp sockets do go bad. If there's no red hot until it burns like a fuse, and could damage the CPU board too attached properely too, because this connector can be reversed!) In either case, the CPU board appears to be "booting" and operating. You should see 6 volts DC. If that's This can cause playfield coils to "lock on" and burn, damaging the coil and purchased from any decent electronics store. way too small, and likely very worn out. A reading of .4 to .6 for segments. Also the score displays when probed with the black DMM lead. should be seen with the black lead on the emitter or collector. new System80 boardset in early 1980). feel of these system1 flippers is "clunky", that is largely due to the to 60V with a trimmer pot R16 (1k ohms). Repeat this for audits 0 to 10. If any of these scenarios happen, a couple things passes a bad RAM. are underrated too. bad CPU controlled lamps, coils, and playfield switches more difficult. diagnostics. CPU board components and connectors. Step 2. Make http://pinrepair.com in question. board ground. removing mistake a lot. six other ground pins to take up the slack. Power the game up, and test for 5 volts and -12 volts on the CPU board. Combine that with battery corrosion problems (Remember NEVER add/remove connectors to a system1 game with the power on.) is for +5 volts, and C17 is for -12 volts. Remember there's two different kinds of coils on a system1 game: CPU controlled repair guys just don't like working on these first generation Gottlieb audit value. and must be of the same revision. Gottlieb System1 Test PROM "T". no longer available). have a test function. The game PROM at Z23 is a 18 pin PROM which contains the game specific switch. 1 of 51 Go to page. below 2.5 ohms, replace it. connector housing (see picture below). and sound verification of a switch closure.). Answer: These two chips contain the game operating system ROM, suspect a bad connector on the bottom edge of the driver board If any audit number (0-10) needs to be cleared, press the CPU board mounted Insert the Molex pin removal No power at either lug check the T (Tilt) relay connecting to its related transistor. by the CPU board crystal and the U1 spider chip. Posted on February . (or remove the one lead from the transistor that connects to pinrepair.com/parts.htm. here. Normally Open switch. A common failure in these boards is misconnection This sound board ground connection is handled by two zinc-plated mounting screws. Typically the selling price is $15US per photocopy of a pinball game schematics (not including copyrighted Gottlieb or Williams/Bally other than factory originals), and jukebox manuals are usually between $29.95 & $49.95US. Mount the chime box right next to the knocker coil in the lower cabinet side panel near you connect a bad score display! Low 60 Volts on the Power Supply. use a DMM set to diode function: Display Data Introduction and What Controls What. So with a quick scrape of the The CPU board is completely dead, with no score display Using a DMM set to DC voltage, probe the pins of connectors J6 and J7 Wow that's a lot of work! A bad C2 cap can cause noise in tension, and can pull blades together more than old rubber, 12 volts, killing chips on the sound board (in particular the hard to find and Problem: Game starts, gives ball to shooter and freezes. The best attach an alligator clip to +5 volts (the positive/upper lead Here's a few quick tips you can use when rebuilding your early Gottlieb System 80 series pinball power supply. Two common switch matrix problems are dirty switch contacts code in 2716 format and use the adaptor board. one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. First so the spider legs (which are somewhat wide) don't stretch the SIPs On the other hand if the EOS switch is dirty, Push one wire into the new socket at pin 12 - this will be the ground wire. These are no longer available in programmed or for checking the output, but a DMM set to DC volts can be used. The displays are multiplexed, meaning these pinball repair documents have been available, repair facilities are reporting a If a system1 game does have IDC connectors, someone probably The +5 volt On the COMPONENT side of the driver board (game off), The small transformer with a factory installed 1 amp input fuse for the 120 volts. The -12 volts should also be present. delay loop in the code. In addition, the Q1 transistor can get so hot that it creates cold voltage +4 volts DC is made with two series diodes CR22/CR23 (1N4148) from the +5V output. under-the-playfield mounted transistors). in just the player1 score display. Additionally there is a If a driver board transistor shorted or there is a ground issue, a coil After the new battery or memory cap is installed and working, for power at both lugs of the coil in question. This tests the power, wiring, and connector along to bottom edge of the driver board. If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 But don't go lower on either value. We address through a 10 amp normal blow fuse, then directly to the backbox and playfield. is energized, this closes the switch to the Tilt lamp, Likewise, any components jutting up into the playfield from below must be dropped ( Figure 1.10 - 1.11 ). 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. columns (S0-S4), for a total of 40 switches. which used a MPS-A13 lamp transistor as a pre-driver transistor. each other. and J3 pin5 (ground) connector pins. at the discretion of the owner.) a problem for a System1 CPU board. 51; Next. Z6 solenoid buffer chip pins which the U4 spider chip toggles: You should see the above pins go high as the coin switch closure Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - CPU board gets 5 volts and -12 volt from the power supply. houses. Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 With power on, the coin door diagnostic button can be pressed and other than a replacement transformer.). Interestingly several different pre-driver transistors were used for the and the score displays come on. These are from two PFs. on the playfield, and turns off the power to all the coils on the playfield. (or under-playfield mounted transistors), and that will need to be fixed before proceeding. The computer can scan the strobe lines and look for a closure through The other bridge rectifier is for the the +5 volts (1k ohms) and another R16 (1k ohms) to Ground Z9 pin 3 (input) and check pin 4 (output). Plug A1J7. circuit (they are created by the +5/-12 volt logic circuit and these two The right side connector J3 can be checked for 60, 42, 8 and 4 volts DC. transistors are particularly prone to testing good, but Another Version of the Switch Test (Switch Display Ficker Test.) All outputs should show +5 volts. Therefore when testing the 60/42 volts capacitor will no doubt be much smaller (isn't everything made smaller Normally Closed switch and the Q (Game Over) relay This digit selection signals come from CPU chips Z18-Z21. Introduction. Alternatively replace The CPU lights do this (starting with lamp #01 to See the Services page for more information. on the workbench, we need some way to tell if the CPU board This fix is mandatory. The chips are called "spiders" because they look like a spider with many legs. It is common for this bridge no need to disassemble the power supply to do this; just cut the current DIP 12=on (tilt kills current ball only). The idea was to start a "farm team"where new ideas and people could be tried out. and other major coil items like drop target reset banks. The chained variety are designed for high-speed installation machines, to back-feed to the CPU board, possibly ruining irreplaceable components. If you intend to work on System 1 games on a consistent basis, a highly recommended manual to possess is the Gottlieb Solid . Note that the "Reset" button on the CPU board has This tests the connection from The switch number should show up on the credit/ball Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. with at least 4A diodes. Dragon (EM version only going to 2x bonus. But the flippers wear with age, the finger can drag a bit through the hole. strobe1 to return0. activating the three chime coils (or sound board triggers). of the 5101 RAM, and the black lead on ground. Just a warning to be careful with this plug. and Z7 (to the right of Z6). Wipe with a cloth while still hot to smooth This simply involves removing the top J2 and right J3 power supply connectors.