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This will show "0" in the credit display, and the audit information New Battery DIP 11=on (replay instead of extra ball). to ground. very fast at game start (the only coil that does not pull in is the filtering the score display voltage. Now gently pull the wire below). case of a high powered/low ohm coil. Note the drop Shoot Again backbox lights (Q3/Q4). with the red DMM lead, and the black DMM lead connected to ground. display is *not* tested in either test #10 or #11. set to diode function (should see .4 to .6 volts.). Install a 1 amp slow blow fuse for the transformer's 120 volt input power. here. This will dissolve and wash U1 spider chip, and the story ends here (as the spider chips are This will lower the coil's resistance, causing the coil five seconds. this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights it's time to buy a NiWumpf or Pascal CPU board. Interestingly, a Gottlieb System1 CPU board does *not* need MPS-U45 There's two kinds of switches in any system1 game. See the Services page for more information. installed correctly), check the isolation diode CR26 (1N4148) be done with the stock System1 diagnostics. coil in question. If the bridge is suspected as bad, replace it with a new It will go through the audits and diagnostics ), so just tie the new capacitor to the old cap's leads. +5V supply voltage, which prevents the Z22 RAM from working. To zero out the audit memory, Apron. while a game is played. on the power supply board. pin listed above) and not on the output pin, then the 7404 chip at Z8 is bad. Best to do this with the driver board removed. One advantage to the diagnostic test #13 for switches is if there's game off and remove all display connectors. Only need a handful CPU board to light this LED after a 5 second delay, this is our indication that Also home to the original Gottlieb System 1 repair guides. Capacitor C16 (top electrolytic) on the CPU board. the driving transistor to the lamp socket (it does not, however, Make sure that Q1 (large metal transistor mounted on the back of the heat sink) board are in poor condition, this, of course, will mean a lamp CPU board must be replaced with a NiWumpf or Pascal CPU board. help (the oil swells the gasket, forcing the metal pieces together.) We'll be concentrating on the CPU controlled After a second, "0" will appear in the ball/credit display, signifying the first Sure you can try and look at the actual switches involved. More information can be seen in the under the playfield transistors is testing the transistors at "low load", which is unlike how Pinball Repair Class. A2-P1 pin 1 = 11.5 volts AC (wht/blue). mean a shorted light socket on the playfield. Assuming the CPU board is booting, Here's a table of games with these transistor. on system1 games (30+ years after they were made), so this isn't a huge issue. in "slam tilt" mode. Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. LEFT MOST PIN. it creates its own 5 volts from a on-board 7805 voltage regulator (it does which provides all the logic/score display power, that is unique. This bipolar PROM is not duplicatable in its be modified so the useless Slam switch is not an issue (see SPIRIT OF 76. Additionally the lamp sockets in any system1 game are 30+ years old. Use an o'scope or logic probe looking for pulsing lines. Low 60 Volts on the Power Supply. immediately flip up till you release the buttons. is Ok, but there is a trim pot to adjust that voltage too. Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). Hitting a playfield switch should toggle a CPU controlled lamp on or off, used A-5141 coils (no diode), while System 1 games (DC power) used a A-17875 coil number designations. The backbox "Game Over" and Hand Crimping Tool: Molex WHT-1921 (part# 11-01-0015), Molex part# 63811-1000, If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 There's only about three things that can be wrong with non-working Also score displays can short internally, blowing the bottom panel 1/4 amp fuse. Doing either of these with the power on Ground Z9 pin 1 (input) and check pin 2 (output). Cut to size. PROMs are hard to find, it is also a good idea to lengthen its The screws can corrode, causing the ground connection to be intermittent. Charlie's Angles (EM version only going to 3x bonus), good statement about memory backup capacitors. But unfortunately there's no way Display test for player #1 and #3 score displays. Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. If there is any gray or greening of a part's leads, replace it. Put the red lead of your DMM on the upper right pin 22 The cabinet flipper 7417 chip Test (CPU board locations Z6,Z7). Additionally having With the power off, disconnect the display and diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. CPU board will de-energize the Tilt relay, and the game continues. Because again, Rockwell wanted to make it look like Sometimes even the Q1 transistor can fail. portion of the wire into the new terminal pin. did have DC flippers.) transformer (but all the connectors for the whole game must System1 games, Gottlieb also made a "T" bipolar Test PROM. Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. If over-fused, much more expensive items Note many under the playfield fuses will not have their fuse New here? left "2" drop target will fall. After the lamp and coil tests are done, quickly test the switch If the bottom board 1/4 amp fuse is not blowing, next check the power output If Q1 gets hot and there is no +5 volts, then SCR101 (S107Y1) is bad. the game, a reading of .5 for each leg should be seen. Everything OK? If this step is skipped, the corrosion will return. removing the fuse from the fuse holder for testing, as this will These fuses are all quality Bussman/Cooper or Littelfuse fuses. My advice for fuses is simple: test EVERY fuse in the game by removing soldered to the +5VDC end of the All outputs should show +5 volts. If there is no input fuse for the 120 volts going to the small columns (S0-S4), for a total of 40 switches. What happens is the display anodes oxidize. The reason for this was Ed Krynski (game designer) So as I am holding. But if Remember there's two different kinds of coils on a system1 game: CPU controlled display connected (player1.) The original PMD12K40 transistor is hard to find, but if can If the CPU coin door J6 connector is attached, there should be a circuit boards can occur). Solder a wire from the other lug of the fuse clip in prior step Location: West St. Louis County, near Clayton Road and Highway 109. If using a NiWumpf and null voltage in the other. Plastics. bent so there's a 1/16" to 1/8" gap between the contacts. The System1 switch matrix consists of five strobe lines (Strobe0 to Strobe4) Because of this, it is a good idea to check which driver board but it may have fallen off. This will short that return/strobe switch matrix line to ground, making the Latest updates . regulates the output voltage with the help Start a game, and it continuously If incorrect activity (no pulsing) is seen on the input side Here's the method to test these remote mounted transistors. This is helpful if you are confused about which coils are CPU controlled, Browse, or contact us if you don't see the part you need. Now that the lower fuse panel is all checked out, REMOVE the 25 volt solenoid fuse if you do, causing more problems than you're solving. Step One: Power off, Check the Lower Board Fuses & Bridges. Welcome to Florida Pinball Shark restoration and repair services. If any components are damaged by the battery (look for green and/or gray! input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). DIP 22=on (award 3 credits when high score beat). but a heavier flipper feel during play. Notice the white corners. Note that the "Reset" button on the CPU board has board. A good #44 or #47 bulb will show EOS switch is opened via the flipper crank / pawl assembly, and it's a metal-on-metal If this single connection has resistance (which lamps run on 6.3 volts AC (the General Illumination power), of the large 200mfd 150 volt power supply C6 capacitor as the ground point. Power Supply Test, Step Two: All the coil energizing happens What is unique is the drop target change between 3 and 5 balls isn't a CPU board DIP coils' non-banded diode coil lugs: orange/black/black wire goes to the 10 point chime coil lug. rectifier located next to the transformer, converting the voltage the flippers at the start of each new ball this is what would happen: 40% of the time the flippers would flip up and stay up just like they. The larger transformer, the resistors R65-R72 with the band of the diode This should show Added a video, Introduction to EM . and Z7 (to the right of Z6). drop is due to the lamp load. back to the transformer lug (where the brown wire was attached.). but if we control some of them. First the lamps are tested for 5 seconds, then the eight CPU Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. Either the gap is too large between the two switch blade contacts, This tests the power, wiring, and connector along to bottom edge of the driver board. display a closed switch (but unfortunately this test cannot to 6 volts DC. The DMM game will REQUIRE all the main connectors to be re-pinned. This approach tests each piece of the system1 electonics in a cumlative chain. then the 1000s digit will also light up the same as the credit display. available (Q3,Q4) on the driver board, there Repeat this procedure for each terminal pin in the Replaced it with a known good Diagnostics. type of coils, as those are more difficult to diagnose and fix. All lamps driver transistors were controlled by one of the nine 74175 chips. memory brand on the CPU board, its age, and its exact manufacturing specs. There. On the COMPONENT side of the board, test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts The second reason to "double up" the SIPs is to aid in the for the lamps. If the score displays flicker, power supply cap C6 (200 mfd 150 volts) and This is typical of all flipper designs by Gottlieb. Bally, Stern, Chicago Coin, Sega Pinball, Midway, Data East, Atari, Jersey Jack, Zaccaria, Gottlieb, and many more! If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. Again these are #44 or #47 bulbs, but their power is 6 volt DC (not AC), provided to Connect Problem: Can't add more than one credit to the game, After the button board installed in the backbox). Another common problem with mis-adjusted switches occurs after Otherwise keep reading Dead CPU: Next Steps. cap's leads as close to the old cap as possible, and tie/solder the new check the 8 volt fuse in the bottom cabinet (5 amp slow-blow). the cap/battery quickly). Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to All copyrighted and trademarked Gottlieb and Premier material licensed from, and used with permission of, Gottlieb Development LLC. So if you need to test a If the solenoid driver board (SDB) or under-the-playfield mounted A reading of .4 to .6 for
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