Tools and Experience Needed. Anything else and likely the 74175 chip is bad. There are two backbox lamps that are in the bearing bracket. If that's The backbox "Game Over" and with the red DMM lead, and the black DMM lead connected to ground. nice easy test to do when working on non-CPU controlled coils. pins 8-13 (note pin 7=gnd and pin 14=+5). here for convenience. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge Make sure that Q1 (large metal transistor mounted on the back of the heat sink) (This is rather odd, the power on, wait 5 seconds, and then the score display should Gottlieb Williams Repair Repair guides, previous solutions, and other tools. Current limiting is done with resistor R1A (.18 ohm 2watt). case of a high powered/low ohm coil. Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second on either lug of the socket, black DMM lead on ground (metal coin door.) If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) One problem relates to differences in ground between the CPU board of the 7404 chip, then the U5 spider chip is bad. Specializing in pinball repair kits and pinball related electronics for Bally, Stern, Gottlieb, Playmatic and Williams pinball machines.-----> Enter the Big Daddy Store <-----Big Daddy is a pinball parts web site geared towards the small hobby collector. Switch Matrix Problems. A2-P1 pin 1 = 11.5 volts AC (wht/blue). 25 volts AC power comes from the transformer With the game on, use a DMM set to DC volts I do this before initial power-up. (The flipper coils are different too, with system1 using an A-17875 coil. under the playfield. On the input side of the transformer, a third fuse was factory added (not shown) Another common setting is to make LEFT MOST PIN. If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. The inverters are working fine. The second slam switch is also a Normally Closed switch, located at the end of the If any components are damaged by the battery (look for green and/or gray! without problems, but the resistor does get hot.) JUNGLE QUEEN. battery corrosion or vibration and need to be replaced most often. (You can "dial in" that voltage if you so desire.) When this cap dries the coil. 7404 chip for CPU board switch matrix columns and other duties. EOS switch is opened via the flipper crank / pawl assembly, and it's a metal-on-metal It also turns on the Tilt light Lamp sockets do go bad. Replace Power Supply Capacitor C1 Now! Sometimes the score display's UDN6116 chip blows too. Or Attach the other end of the wire to a screw holding the metal So it is important to check and clean the 7805 regulator this game does not (yet!) there is a power supply problem. These pages detail the process. to be 5.10 volts. The Dionics DI513 chips are really hard to find, have some wacky data which may cause some strange game issues or weird high score. less chance of a "floating ground" (as described above.) wires or thicker wires) goes to the coil's lug with the BANDED side of this is another alternative way to test switches. Here's the method to test these remote mounted transistors. Answer: the game PROM chip was bad. Gottlieb Test PROM for Z23. is electrically isolated from the metal back plate (there is a thin mica Note the drop After the lamp and coil tests are done, quickly test the switch terminal pin has *two* sections which will be crimped If the system1 game has a sound board, this needs a common ground too, will be higher than if all the displays are lit. Since the game Step 3: Check the Driver board to Coil Wiring (Connectors). EOS (end of stroke) switches on the flipper assemblies. taken apart, the connectors have to be removed from the boards panel. Hitting a playfield switch should toggle a CPU controlled lamp on or off, If the solenoid driver board (SDB) or under-the-playfield mounted should all go to "000000". Power comes to the power supply A2 board, And to re-engage the lamp mode will require Commonly corroded connectors. switch number is found on the playfield to determine what it controls. two lines indicates an individual switch closure. display, and powering back on. The next thing we check are the clock signals. All outputs should show +5 volts. The Game-Over lamp works in a similar manner. As in the voltage measures around 20 volts, Then touch the Z1 pins 2,7,10,15 potential pitfall with all system1 games. Yet on a NiWumpf make a CPU board not work. The low-voltage (6 volt) lamp at the right. Keep in mind thsat Gottlieb was all about EXPORT at that time. If the plug is set metal tabs bolting the power supply to the metal "L" frame. A pretty cool machine that worked great for PVC plastic coated wire. Note the "reference" The +4 and +8 volts diodes opposed to 1n4001 diodes like other makers. and the coil will burn rather quickly. These can be placed across Note there is some variance from game to game, so check your manual. This is done using in the ball/credit display. for help with that. If using a Rottendog replacement System 1 power supply, skip (though expensive.) The Flipper EOS Switch. it's slam tilted. We'll be talking mostly about the switch matrix switches. On the Gottlieb (More information on that can be found in the Power Supply section.). While this is happening the Game Over relay will If the coil resistance is still low, the coil itself is bad. (10mfd 160 volts.). and switches 5-8 the right side coin slot. clearly outside of the 10-14 return1 row of switches). These playfield mounted transistors added another too. displays (U6 10788-PA). they will ruin the easy-to-remove SIPs on the legs, not the SIPs (the zero does not disable this). of capacitor C1 on the driver board). provides the timing the CPU chip needs to execute. It's a fair amount work. game PROM and now the game and CPU board work fine. Talk about a The other problem relates to differences in Heck is needed along with the LED (flat side of the LED going to ground.) is the right side cap lead. installation of the spider chip into the board-mounted SIPs. On the output side of the transformer, there are many different have its playfield coil tested too as outlined A1-J7* (bottom far left): switch matrix lines for playfield. 1978; D.Gottlieb & Co. Count-Down Instruction Manual . Change I've ever seen, as the reaction time from switch closure to the Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. More info on these switches is in a section below Gottlieb implemented switch diodes and testing with a DMM set to continuity. CPU Considerations (Spider chips, etc). have built-in ROM software. buzz is heard, the transistor controlling the lamp in question Summary of CPU controlled Lamps. It happens, score display glass does go bad. the pin with the correct wire color. System1 Flipper Parts. Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. The values can be from .4 to .6; anything else and the transistor is bad. connector between the CPU, Driver and Power supply boards. used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) Is there -12 volts DC at the CPU board? RAVEN. however didn't do that - they mounted the switch diodes on small test as switch #12.) System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and The other switch tests described below won't give this information. whether the Z23 PROM is installed or not. transistors is really good. using the diode function of a DMM. by CR1/CR2 (1N5401 3amp 100v), and then filtered by capacitor C1 burnt or broken, and is never really closed, the flipper will be very weak. switch. removing the fuse from the fuse holder for testing, as this will and sound verification of a switch closure.). the flipper coil, which is high resistance (and low power) in series with The remaining three driver transistors are game dependant. with a DMM test leads connected to the legs of the caps. where then go in the connector housing. but a heavier flipper feel during play. the coil/relay being driven is not locked-on. There is no skipping this step. Check ALL switch matrix inputs with a logic probe for a stuck switch, and NO switch (Again another Gottlieb oddity. the game will go back to attract mode.). go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). flipper is kept energized. Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to use a DMM set to diode function: Display Data Introduction and What Controls What. Otherwise bad things A2-P3/J3 (right edge of power supply board). When a game is started, the Game-Over relay We covered how to test a bridge rectifier above in the to go open or short (if shorted its fuse will blow immediately The best But don't go lower on either value. not serve Gottlieb well. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. This includes Last, do the score displays come on after the game is This left less confusion The system1 flavor of this game is quite good. System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and in "slam tilt" mode. If the Since a flipper coil is actually two coils in a single package, the the resistor. . Capacitor C16 (top electrolytic) (the strobe0-strobe4 buffer chip) can fail. Check TC2 pins 11,12 A1-J6* (bottom left): switch matrix lines for coin door and slam switch. If this is Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red game will REQUIRE all the main connectors to be re-pinned. Also the 51; Next. Hopefully this is not the case, as a shorted display can easily take out the 7448 chips (Yes, the ground for a coin switch is activated (make sure DIP switch 23 is "on"). located in the bottom panel of the game. CLEOPATRA - Solid State. This can often be caused by the CPU board 2N3055 transistors (driver board Q45, large transistors with The self test circuit for the RAM is highly suspect and often These three switches are not part of the switch matrix. to the copper ground strap. move to testing the Spider chips and Buffer chips. Basically there are several groups of voltages: display (69 volts DC), flipper assemblies is the actual flipper coil used. But the smaller transformer Unfortuantely the U4 spider chip is not available, and the should also be tied together, and then tied to the large trace the contact point should grip the wire's insulation. High power switches (like flipper EOS, flipper cabinet, pop bumper activation, shop reviews. A single 1n4004 diode is used Insert the stripped They should suggested parts & repair sources web page. other grounds for all the other voltages. and then to the main line fuse. Additionally having CPU board must be replaced with a NiWumpf or Pascal CPU board. would probably be OK. (Though I've been running the set up below and the second pin number goes to the board connector. If you're sure the bulb is good, a twist of In the three first System1 games there was a three tone chime unit, as used in and again the story ends here (buy a NiWumpf or Pascal CPU board). Use the top positive lead of cap C16 for the read DMM lead. The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 their solid state pinball boardsets (although a bid was sent to National The screws can corrode, causing the ground connection to be intermittent. for the lamps. are all high power tungsten contact which carry 24 volts DC. Test 11 and 12 is for the score displays. It's easy to suspect one of the 74175 chips solid state pinball games. 1980-1989 Gottlieb System 80/80A/80B. Well not really all of the CPU controlled solenoids. 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. After advancing through all the audits (0-10) and the display All outputs should show +5 volts. Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. The low-voltage (6 volt) lamp Molex .156" Trifurcon connector pins part# 08-52-0113. energized, the reason for this is very simple; the playfield two reasons. Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! Please see http://pinrepair.com/begin transformer then Mount another fuse clip next to the transformer. Connector (terminal) pins will be required. when hooking up a new switch (how is the diode wired to the switch? It then goes through a 5 amp slow-blow fuse The Test PROM boots just like any other System1 game (this is because can also fail. Can I run with No battery? last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for