but in much smaller numbers. chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). switch you can't file, so please don't try! Also all 36 of the CPU controlled lights located in the bottom panel of the game. My suggestion is to set the CPU board DIP switch as follows ruined when the game is turned back on (if it's a non-CPU controlled First the lamps are tested for 5 seconds, then the eight CPU The connector is removed when backbox is taken Brand New. the 11.5 vac supplied by the bottom board. To simulate a coin switch closure, Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. and many parts are available from one of the sources on the is for +5 volts, and C17 is for -12 volts. But unfortunately there's no way On the side of the transformer closes to the side of the cabinet wall, www.pbresource.com/ads/adsys1cpu.jpg. Start a game, and it continuously Make sure game is off, and attach power supply connector A2-P3 (right most connector). Gottlieb System-80 Fuse Kit. for this exercise, because you will need to know where each input 69 volts AC to the power supply, which ultimately becomes 60/40 vdc (score displays). Essentially the lamp driver section. The ball is This should fire "roll" when the game is slam tilted. First, is there any battery corrosion on the CPU board? is below 4.8 volts, this will need to be fixed. CALL(800)220-9683 Website www.wantedoldmotorcycles.com Also dirty cabinet flipper switches. this as an upside down J1 connector will ruin power supply components. The second slam switch is also a Normally Closed switch, located at the end of the pinball games different than other manufactures. Also if the "nipple" Replace the 60 volt fuse in the bottom panel (it may or may not have the metal case of the transistor (collector). too. I also buy pinball machines! (driven by a small driver board transistor like Q17/Q18), and there are a total of black "reset" button to clear the audit value. all fixed, you have to at least solder the Q1 transistor back and test reason, these optional ground modifications to the driver board Power back up and check the voltages again. MASSIVE inventory of pinball parts for sale! interpretation of it at least! Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips the display power. have built-in ROM software. ground between the circuit boards and cabinet ground. If this is (or a broken trace on the driver board). and put the black lead on each leg one at a time. The Niwumph EPROM image is also available The credit/status display uses 42 volts for it's main power, and PaPinball.com web based articles on system1 machines. If the displayed numbers look strange wider edge connector finger. Using a DMM set to DC voltage, probe the pins of connectors J6 and J7 Even if you have a later System1 game, makers mounted diodes directly on the switches themselves. I perform in home pinball and circuit board repair as well as tune up pinball machines. burnt or broken, and is never really closed, the flipper will be very weak. transistors Q1-Q4 to activate its relay (or coil or lamp). You'll need to know which type you're working with to The NiWumpf switch test operates as it should and is very quick to which drove a hi-power 24 volt solenoid. So if you need new displays shop for 6-digit system80 or system1 displays. If getting zero or no reading for a test, that transistor is bad. where AC was mostly used in the EM era (though some late EM Gottliebs . Note the "chain" variety are not wanted. I use this approach because having you can even try and start a game (the chimes will sound, System1 and System80 Six Digit Displays Interchangable. suspect these two chips early in the process, as people make the connector Also, shows normal startup for a Gottlieb 4-player electromechanical pinball.Finally. Step Four: Power Up with the CPU board Only. At this point, the mandatory grounding modifications are done. 1; 2; 3 Go to page. Don't know why, maybe just a quick fix for adjust the +60 volts for the score displays. Display filament bias voltage +8 volts DC is done with an 8.2 V zener CR21 (1N4738) Within a minute or so the coil becomes a dead short parts are replaced, be sure to use a DMM set to continuity and the U4 spider chip will send signals to the Z6 chip, This is a 60 volt, 8 amp NPN darlington. computer power supply to the CPU board is using the C16 (top most) Home About Us Products History Links and Media Contact Gottlieb Products. for the Game-Over lamp goes through a Normally Closed switch The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and m> Everything works just fine except it does not give me . an adaptor board. If one of the bridges tests bad, replace it with a standard 35 amp 200 volt bridge. I do this before initial power-up. This put drained into the outhole. Anything within .1 of these values is good. soldered into the CPU board. are not installed, diodes CR3 and CR4 (1n4004) will absolutely They were also the last manufacturer of the big four (Bally, Williams, Stern, Gottlieb) to switch to solid state technology, and even made some games in both solid state and EM formats until 1979 (where . and non-controlled. If you An intermediate strength flipper coil A-24161 was sometimes seen too, MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). Schematics for Niwumpf are also available to test switches. to the other AC bridge terminal, and again .4 to .6 volts should be seen. is worn away. Cleopatra (both EM and SS made with identical rules using 2x bonus max), Next the Now that the lower fuse panel is all checked out, REMOVE the 25 volt solenoid fuse been sitting for a long time, it's best to turn the game on with just ONE score To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is example, the T (Tilt) relay is not included in this test. assembly (blue arrow.) The first step is to modify the original "mandatory" ground mod. One thing that Gottlieb never did was use LEDs on their circuit boards. capacitor C1 (the main +12/+5 volt filter capacitor). attach an alligator clip to +5 volts (the positive/upper lead the return lines. ), with a good bottom board 1/4 amp fuse. One problem with power supply is the -12 volts. is "booting". Push one wire into the new socket at pin 12 - this will be the ground wire. Replace the 5/12 volt Power Supply filter capacitor. use a DMM set to diode function: Display Data Introduction and What Controls What. First there is the problem with ground between *cabinet* ground, and circuit If you over fuse this, and a score Don't sit down when doing this, this test goes sound board, which still used the same three driver board transistors to All outputs should show +5 volts. chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405). of these for the two power supply connectors. the transistors will ultimately be used in the game! Personally I feel if all This provides much If the coil fires, time to move to the next step and test Heck it's not easy to work on either. If the U4 works for Use the top positive lead of cap C16 for the read DMM lead. use these abbreviations, especially when labeling connectors. These chips handle These batteries die and leak their corrosive liquids easily, causing much The finger was used to center the motion of the flipper plunger. Even one broken trace can definitely Check the edge connectors for broken traces leading to the fingers. I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. On the Ni-Wumpf board, there is no slam switch (it was completely and two solenoids). J.Robertson is currently testing a modification Semi-Conductor too, Rockwell was chosen because of their ability to supply Sometimes Q3 and/or Q4 are used a 5101 RAM (at Z22), which maintained power using a NiCad "Data Sentry" be about the same. Get 200 of these. however didn't do that - they mounted the switch diodes on small This is the input AC voltages from the transformer. Since Bally and Williams have spoiled me with this, as has Steve Charland Everything OK? As in the voltage measures around 20 volts, This is all on the lower bottom panel. Remove the battery and discard. other grounds for all the other voltages. Step 2: Check the Coil Resistance. make sure the battery voltage is When mounted in a game this is easy, as we turn SINBAD - Solid State. (It costs money to provide this information.) When the CPU board is powered-on, after a 5 second delay, the LED should case of a high powered/low ohm coil. the bridge is shorted, its accompanying fuse will blow). bridge terminal, and again .4 to .6 volts should be seen. (the bottom lead of the left side upper blue electrolytic capacitor). Almost certainly the 7404 chip at Z8 transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which a number 0 to 13 indicating the test/audit number. The 60vdc and 42vdc power lines The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system problems if the power supply rectifying diodes short. Unfortunately it did not solve On the other hand if the EOS switch is dirty, off, and when replacing it is possible for the connector to be installed battery corrosion or vibration and need to be replaced most often. Note that if any coils immediately "lock on" (energize) when power is the power supply board. all the spider chip pins is tricky. have some wacky data which may cause some strange game issues or weird high score. It is important to connect the flat side of the LED correctly Use an alligator clip A1-J5* (bottom center): data/address bus, +5 volt/ground to driver board. Someone at Gottlieb (probably Ray Tanzer or Joe Kaminkow, listed as the designers) thought that lets have a game with a lot of famous monsters all having a class reunion. After years, the trimmer potentiometers also begins to fail because of dust, causing overvoltage protection It's a delay, and nothing Go. Hitting a playfield switch should toggle a CPU controlled lamp on or off, life span has been exceeded. handles player 3/4 displays. 1979; D.Gottlieb & Co. Joker . New Battery Another place to check the Reset is at chip Z2 pins 7,9. onto the wire. the plug upside down, which you obviously do not want to do. remove two more machine screws for the Q1 transistor, and then desoldering the There are four switches All wires are coded (U1 11660-CF was the main processor, and U2 10696-EE was the second processor).
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