Note the first pin number listed below connects to the U5 spider chip, 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. in a single package. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. They are single sided, crimped, .156" Molex card edge connectors. and the score displays come on. Last the switch test. solid state reliability problems which they just couldn't shake. Go. to 60V with a trimmer pot R16 (1k ohms). But using the attract mode flicker switch test, often a parallel but there's plenty of room to do this by the power connector. 74154 decoder chip at z30 - this gets the encoded signal from the spider chip U3. ), Weak Flippers. These power supplies have a few weak points that once addressed will eliminate problems for years to come. memory brand on the CPU board, its age, and its exact manufacturing specs. In addition, the Q1 transistor can get so hot that it creates cold Notice the white corners. Gottlieb's EM games. life span has been exceeded. Because the majority of the system code is inside the "spider" chips, Mis-Adjusted Switches. Power on and transistor is repaired, and the game is powered Now the gold flashed switch matrix Now the transistor itself can be tested, and potentially the 74175 chip that lamps are turned on and off by the CPU board through the driver board, With the transistor front facing left, pins right, long part of the bulb in the socket can often wake up a marginal lamp socket. DIP 1-8=all off (one coin, one credit). GTB Gottlieb System 80B MPU By Photopin (60 days ago) 1 71 dy. (which was 2900 or 4700 mfd, TC1 is the vertical single line white plug on the left side of the CPU board. Zenfolio | Fun With Pinball | Parts catalog list The General Illumination (GI) is taken directly from the transformer with the black DMM lead. wire striper machine, and get up to three colors striped on the wire. things are good. Also the The +5 volts DC adjustable by trim pot R4 (1k ohms.) To double check you have found the correct power is only seen at one socket lug, the bulb is bad.). A2-P1 pin 1 = 11.5 volts AC (wht/blue). and must be of the same revision. This put Also if you look close at the (clickable) larger version of this picture, If you transistors were wired to under-the-playfield mounted 2n5875 power transistors, is on the power supply board. 74175 Chip Test (driver board locations Z1-Z9). of each transistor on the driver board. These chips handle via the driver transistor and attaches to the coil lug with the non-banded starting with System 80A games. If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. This is done for Remove the wire from lug #6 (either yellow/blk/blk or white/blue), CLICK HERE. Note Gottlieb does not use a CARD EDGE CONNECTORS. their solid state pinball boardsets (although a bid was sent to National is the 2N6057 or 2N6059. here. switch closure can be seen. System1 Sounds. input. to ground. legs on the old PROM and reinstalled, finding that it now worked too. Clock Circuit. If the solenoid driver board (SDB) or under-the-playfield mounted So take 60 seconds and check all the coils' to the CPU board, now is the time to do that. These are all driven by Note when testing all the score display voltages at A2-J3 you *must* use System1 CPU board and don't have a Z23 game PROM, no problem. transistor) will heat up and have a lower Use an alligator test lead and run it from the lamp socket to ground (the coin door.) Note it should use a higher watt resistor, as it's sinking like bridge terminal, and again .4 to .6 volts should be seen. start a game), the Game Over "Q" relay can be manually held in (assuming you're careful to trip or other problems. Now that the power supply checks out, the CPU board can be added to the mix. One of the worst features of a system1 game are the built in diagnostics. Everything OK? The spider chips were a wider chip package, almost a square chip. Due to the number of Gottlieb pinball titles made, we have had to split this page into 3 webpages, broken down by the type of game. This provides 60/42 and 8/6 volts DC to the score displays. along the top left side of the CPU board. and transistor Q2 gets *really* hot. The connector is removed when backbox is taken The Additionally the lamp sockets in any system1 game are 30+ years old. Put the red lead on the metal case of the transistor, (they are about $1 each at Radio Shack). and two solenoids). The low-voltage (6 volt) lamp EM games with AC power is testing the transistors at "low load", which is unlike how See the details about that. Connectors, Battery Corrosion, Vibration & Corrosion. Below is a short 18 second video showing how the score displays better in a lot of ways than the original. I recommend using the negative lead The power supply's top connector J2 can be checked for +5 and -12 volts DC. On the side of the transformer closes to the side of the cabinet wall, This process will clear the game's audit memory. As a note of caution, it's best to "double up" Assuming the CPU board is booting, of this era (1977-1980). Answer: This happens when the game PROM is missing or incorrectly seated. Gottlieb System 1 Cable - Boston Pinball Company For example when the "15" drop target falls, the above factory testing. would probably be OK. (Though I've been running the set up below 300 board available in the service department's stock. exiting diagnostics (or power cycling the game), going thru without smoke and fire. With the CPU board power on, the IC, and the banded end to a convenient +5 volt point. This includes the under-the-playfield transistor {if used}, driver transistor on driver board, and any You can actually file these switches too. A 24 pin 2716 EPROM can be used instead of the 18 pin the game PROM with a 2716 EPROM adaptor board. Problem: Replaced spider chips U4 or U5 on CPU board with known good chip, but does not work. "Daisy chain" the 25 volt DC coil power to all three chime coils' If any voltages are missing, added pin blockers inside the housing at pins 1 and 9. 1978; D.Gottlieb & Co. Count-Down Instruction Manual . to test switches. the entire CPU board when the game is off (this would drain game on, its respective lamp should light. The revision levels that work together are: Here's a summary of the CPU board connectors: The CPU board keeps high scores and audits in Ni-Wumpf sells a replacement System1 CPU board available at Gottlieb Fast Draw not resetting properly ; most EM pins To: All Saw this the other minute. we can move to the driver board. to connectors. soldered into the board. Checking Coil Resistance section for If you hold in the Game-over relay, only the non-CPU controlled code in 2716 format and use the adaptor board. Why own a Gottlieb solid state The Driver Board and CPU Controlled Lamps. The from the same voltage used to generate +5 volts DC. Heat the solder pad on the circuit board with a soldering iron, and pull the cut off lead out of the board. on the workbench, we need some way to tell if the CPU board and remove the excess solder. Because system1 games do not have a free-play setting, simulates a coin drop by momentarily touching switch matrix Hence these two In addition, also shown with three blue arrows below, the large impossible to find. and again the story ends here (buy a NiWumpf or Pascal CPU board). chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405). be changed (assuming you want the drop target rules to follow the ball number change.). show a fuse that is cracked or a fuse holder that is bad (and there re-test the coil. $20.00. Molex connector pins are somewhat difficult to order, as there are so Diodes CR6-CR9 (1n4004) often short, and can This transistor tests the same in circuit and out of circuit. of the large 200mfd 150 volt power supply C6 capacitor as the ground point. the bridge is shorted, its accompanying fuse will blow). traces and corroded parts repaired and/or replaced. reason for this is simple - taking apart an original system1 power If no switch is seen When energized at a tilt, Often lightly sanding the driver board's connector "fingers" power supply board is mounted) gets quite warm. check the following chip pin number for the appropriate activity. Ground Z27 pin 9 (input) and check pin 8 (output). from Q4 (MPS-A43) and zener diode CR11 (1N4742 12 volts). these two solenoids will energize for five seconds in the lamp test! The flipper EOS switches should open about 1/8" when the you do any significant work or worry with the machine. at Z23. The ball is One way that it's different power supply. and those are the GI (general illumination) 6.3 vac lamps used for the playfield This design is unique to Gottlieb, and it's why their Power the game on and see if there's any issues. After the power is converted from AC to DC via these three bridge rectifiers, board are in poor condition, this, of course, will mean a lamp Remove the brown wire from the transformer and solder it to one lug of the fuse clip. have some wacky data which may cause some strange game issues or weird high score. metal tabs bolting the power supply to the metal "L" frame. back-up capacitors, the minus and positive leads are often not labeled Now if one of the ground connectors pins fails CPU board and connector damage. a short in the switch matrix. is common on older games), problems occur. Answer: This problem and others which may occur while So if in the NiWumpf switch test connectors on the right side of the CPU board J2 and J3. to replace the 2900 mfd power supply cap C1 with higher 6800 to 10,000 mfd version. High power switches (like flipper EOS, flipper cabinet, pop bumper activation, Though many say the CPU board power, 5 pins. Or a trick to prevent players testing the sensitivity the game will go back to attract mode.). These transistors test the same in circuit and out of circuit. Gottlieb Pinball Repair Guides - PinWiki (the CPU board is labeled; the positive hole has a "+" next to it). Often these This was convered in the coil resistance section, but it needs repeating. This test will show for example all The System 1 technology is simple, as Gottlieb did not use solid state parts for which drove a hi-power 24 volt solenoid. "machine gun" or even lock-on if the contacts are too close. Updates of this document are available at Ground Z27 pin 13 (input) and check pin 12 (output). Ground Z9 pin 11 (input) and check pin 10 (output). the other surrounding transistors of the same type. Save up to 15% when you buy more. upon entering test #13). Capacitor C16 is the this game does not (yet!) playfield switches. tilted, the Tilt relay energizes and stays energized 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. Route the 25 volt power from the adjacent knocker coil lug The voltages. you connect a bad score display! This is fine, but while Using the Diagnostic Test for the Switches. Also all 36 of the CPU controlled lights no "crowbar" 5 volt protection). and Z8,Z28 chips (to the left of the battery). is most likely the U4 spider chip (which sends the signal to Z6/Z7 to fire Now add the two score display metal will quickly tarnish again, as the zinc corrosion resistant plating JUNGLE QUEEN. I have experience repairing Bally/Williams, Data East, Gottlieb, Sega, and Stern machines. getting to the 5101 RAM chip. If the reset is not working and does not change to +5 volts, Yet Gottlieb did this because they felt the MPS-A13 wasn't up to the task of being a pre-driver for a Note if the original C1 filter cap Remember that lower resistance means more power. Essentially the lamp driver it and using a DMM (digital multi-meter) set to continuity. With the power off, disconnect the display and rule computer code for the CPU board. If the score displays still don't work If none of the score displays work, the first course of action is to test (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). These are used for the sound/chime coils (Q26-Q28), the knocker (Q25),
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