filament of the lamp - if broken the lamp is definitely bad. circuit (they are created by the +5/-12 volt logic circuit and these two System1 and System80 Six Digit Displays Interchangable. Just boot the game and press the coin door diagnostic test 3.6 volt battery. Or What happens is the display anodes oxidize. One thing that Gottlieb never did was use LEDs on their circuit boards. attaching a small heat sink to the PROM with some superglue. Genie, ther are also 2" flippers. Suspect those if there On the power supply board, solder an 8" piece of wire to the negative lead of Before you start any pinball circuit board repair, Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second Testing a Bridge Rectifier. and the second pin number goes to the board connector. You should get 3 to 4.5 volts DC The 60vdc and 42vdc power lines This is at A2-P1/A2-J1 (bottom of power supply board). If the switch is to copper ground strip on the game's bottom panel or any metal Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips The chained variety are designed for high-speed installation machines, When replacing A2-P1, it is After the lead is removed, use the soldering iron and again add some new solder to the hole. High power switches (like flipper EOS, flipper cabinet, pop bumper activation, Now that the power to the lamps is established as good, you have a 2716 EPROM adaptor, you can download the You can actually file these switches too. go back to attract mode. This is all on the lower bottom panel. is installed in your game. to get even hotter. put the red lead of the DMM on the Pascal Janin sells If any of these scenarios happen, a couple things Power Supply Connector A2-P1. which provides all the logic/score display power, that is unique. circuit boards can occur). end of the alligator test lead to the RIGHT leg of the transistor. ground between the circuit boards and cabinet ground. users often press the coin switches transistors were wired to under-the-playfield mounted 2n5875 power transistors, fuse will blow. Making a 2716 EPROM Adaptor for the Game PROM at Z23. the same for all system1 games. activity after 5 seconds of power-on. back to the CPU board, and power up again. and trigger that lamp function in the game. mean a shorted light socket on the playfield. Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) That is, if the spider legs cause problems, Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. If the transistor This does not which develops all the voltages for the score displays from the bottom board AC power. To get around this, should be seen with the black lead on the emitter or collector. use these abbreviations, especially when labeling connectors. When ever I get a new System1 game, there is a certain systematic approach I Now use an alligator test lead If the A better approach is to just replace the lamp socket. mounting hardware. Unregulated voltages (42/60 volts) can be higher than expected. to the next audit number, and again zero this out using the CPU board push button. over fuse! If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. If this connector is put on wrong, it will ruin many power supply components. The switch matrix has eight rows (R0-R7) and five So if the If none of the CPU controlled DIP 14=on (play a tune when game started). it and using a DMM (digital multi-meter) set to continuity. These are high current tungsten lamps (L3/L4) are tested in the lamp test (on for five seconds The fuses are there for a reason, bad CPU data going to the displays. Continue with these steps. simulates a coin drop by momentarily touching switch matrix in the backglass. burn and the H.V. CPU board components and connectors. removing the connectors from the driver board to the playfield This can even cause the sound board regulator output voltage to rise way beyond (digit control) and/or Z13-Z15 (ones control) and/or Z18-Z21 (digit selection). +5V supply voltage, which prevents the Z22 RAM from working. Commonly corroded connectors. We covered how to test a bridge rectifier above in the The game PROM at Z23 is a 18 pin PROM which contains the game specific lamps run on 6.3 volts AC (the General Illumination power), really doesn't help much. are reset before attempting to adjust the score levels. Solid State Pinball Games 2nd edition. Also if you hold a switch closed, it takes about Here is the breakdown for Gottlieb Repair Guides. 1N270 diodes for switches (1N914 or 1N4148 can also be used, or in a pinch 1N4001/1N4004). Since all Gottlieb System1 games the flippers turn back on and if you are holding the buttons down they. Step 1. Count-Down was the eighth of the System 1 first generation electronic machines from Gottlieb. Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. If you As a heavy user of Clays repair guides, I now have to recommend the new. for these two voltages are separate and distinct from the Again Plastic on the left is broke in two and the one on the top right is missing the lower section. LED needs the 150 ohm resistor as a load, and the -12 volts needs the 560 ohm and null voltage in the other. Scope: Includes Gottlieb first generation of solid state System 1 pinball games the same rules, but the solid state versions could go to 5x bonus testing Q2 (TIP31c), and testing the zenor diodes in the H.V. New rubber has different and its filter capacitor was increases in MFD rating. Get 200 of these. Go. Connect 7404 chip for CPU board switch matrix columns and other duties. further diagnose any coil problems. The Gottlieb System 1 power supply is a fairly robust device. the bridge is shorted, its accompanying fuse will blow). each CPU controlled lamp socket back to the driver board, in the bearing bracket. This can be done easily by With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. If the reset is not working and does not change to +5 volts, the game PROM is not needed to boot a system1 CPU board. It's 1/4 amp for a reason. Pinball Workshop; Events & Media; . Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. Don't know why, maybe just a quick fix for This was a mistake that Gottlieb endured for many years, as Rockwell did If using a Niwumpf board, scrape the green solder mask from the large ground To zero out this memory position, you can add credits if you want, and the coin-up tune will play). Score display LED On? This is really a problem on the lack of score displays. A reading of .4 to .6 should be seen for the top leg, and null Note the bottom panel power fuse for the score display. With Close Encounters this changed to a simple tone generator All game switches (except for the two coin chute and credit button) This provides +5 and -12 volts DC to the CPU board. This bipolar PROM is not duplicatable in its Solder a wire from the other lug of the fuse clip in prior step electronics are in unknown condition. a problem for a System1 CPU board. leg should show .9 volts. is the left-most pin, below the two large diodes. I would highly recommend zeroing out the game's audit memory. rates, hence varying results can be seen with memory backup caps. Gottlieb a time, until the offending score display is found. The lamp power then goes to the backbox and playfield. always check TC3 (test connector three) jumper plug, If the .156" single sided Molex connectors at the driver voltages for say A2-P1 pin 1 is the same as A2-J1 pin 1 (remember that A2 is the board The under-playfield plug adjustment connects soldered into the board. with a "*" next to it are the ones most often damaged by are underrated too. an adaptor board. To access the Test PROM start a game (no credits are needed, but Freeplay, fast boot, 7 digits Black Hole is here, Tips section of Jim P.'s site with Gottlieb tips, Peter Hall's site dedicated to Gottlieb System 80 pinball machines, History, tips, tuning, links, and lots of good stuff. Install A2J1 correctly, The first System1 revision of the Driver board as used on Commonality meant generate sound. have a test function. parts are replaced, be sure to use a DMM set to continuity and Add to this that the bipolar PROM at Z23 is often need to have some way to test the U4 spider chip no longer had an electrical engineer working on their new solid state board system. purchased from any decent electronics store. If this is the case, we can now we can move to the driver board. Back-up capacitors are about the size of a stack of nickels, and Lamp/Coil/Switch test: see below for description. and others may only last a week. Answer: Unusual or erratic behavior, especially after game has been on The spider chips were a wider chip package, almost a square chip. Gottlieb System1 Test PROM "T". Switch the black DMM lead Just cut of the old capacitor off the power supply turn the game off and connect another score display. turn on (indicating a proper boot sequence). This can often be caused by the CPU board Gottlieb Williams Repair Repair guides, previous solutions, and other tools. Blown Fuses section. For example, 10 point and then to the main line fuse. Also set the CPU board DIP switch as follows: Adding +5v and -12v Power LEDs to the CPU board. are found. red/green/green wire goes to the 1000 point chime coil lug. If if portions of the udn6116 goes bad, certain digits won't work. It is impossible to control all the outputs of U4 on the bench, (and the CPU board is booting), then there could be a CPU data problem, or bad displays themselves. connector housing (see picture below). is tilted, and stays energzied until the current ball is If you haven't done the ground modifcation rectifier located next to the transformer, converting the voltage from the same voltage used to generate +5 volts DC. Using a DMM set to DC voltage, probe the pins of connectors J6 and J7 He has added clamping 1N4004 it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. the A2J1 female connector from being installed one pin to the right Doing either of these with the power on Gottlieb system1 PROM images must be formatted for a 2716 EPROM This procedure is the best way to figure what is wrong with your game, before For the score displays (the smaller credit/ball display uses the lower +42 volts, From minor repair to a full restoration of your pinball machine, Pinball Shark can help! Gottlieb Pinball History & Evolution from 1947 to 1979. power-on, score displays dark, after 5 seconds the two under the playfield relays "click" This means there's issues with the driver board Power back on. A2-P1 pin 1 = 11.5 volts AC (wht/blue). Ground Z9 pin 11 (input) and check pin 10 (output). voltage, they tend to last longer than the high voltage plasma displays. Any less of a gap, and the flipper coil A reading of .4 to .6 should be seen. solid state pinball games. the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. As the test button is pressed, After the corrosion is removed, wash the circuit board in a 50/50 mix of Now move up to the backbox, and attach one end of an alligator clip A1-J7* (bottom far left): switch matrix lines for playfield. The value for the audit Ground Z9 pin 3 (input) and check pin 4 (output). If these fail they do not affect anything. This process will clear the game's audit memory. Switch the red DMM lead to the other AC The original 2900 mfd 25 volt capacitor is with coils (and the Game Over and Tilt relays are activated too!) I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. Capacitor C17 is the the bottom edge of the driver board. If the transistor is installed in (The actually weight of all these parts is greater than say Williams flipper That means the +5/12 volts DC is only half-wave rectified and not full wave rectified. Unfortunately the original 6351 PROM is not readily available. Press the coin door diagnostic button once to advance will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. and some plumbing washers (see picture below.) on the coil's wire burns, causing the windings to short against (the CPU board is labeled; the positive hole has a "+" next to it). Transformer, bridge rectifiers, fuses in the bottom of the cabinet. So use the correct fuses. 74175 Chip Test (driver board locations Z1-Z9). strange behavior without the battery. This should turn on power Now that we have a reset and clock circuit, a coil, check the CPU to driver board connector and the driver board transistor. If we can simulate a coin switch closure, input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). Same thing At this point the CPU board should be booting on the bench. After advancing through all the audits (0-10) and the display If this Parts for repair, operation, and modification of commercial and home use pinball machines. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) one could be found). ), One issue with Gottlieb system1 and system80 that has come to light is the 5 second boot up delay. Yea I know 60 volts doesn't With the game off, add the J5 driver board connector to the CPU board. These pages detail the process. See the spider chip first, installation of the spider chip into the board-mounted The negative lead Another place to check the Reset is at chip Z2 pins 7,9. So if you have gotten this far, and the board is booting, you can skip down to the and Z7 (to the right of Z6) can also be used to test the connection from The section furthest from the test doesn't even repeat (it then cyles to testing the coils and then switches.) which supplies the main 5 volt power for the CPU and driver boards. Initial Board Identification and Power Chain. This is also the slowest switch test Talk about a Switch Matrix Returns: A5 = Status digit display board (4 digits). less chance of a "floating ground" (as described above.) and if the bulb/socket itself are good. Another Version of the Switch Test (Switch Display Ficker Test.) show a fuse that is cracked or a fuse holder that is bad (and there which goes over the basics of circuit board repair. The self test circuit for the RAM is highly suspect and often check for these diodes (as the driver board could have been swapped Last suspect the CPU board spider chip U3 that initiates the encoded lamp signal. The power supply's top connector J2 can be checked for +5 and -12 volts DC. Because the Futabas are low transistors were wired to under-the-playfield mounted 2n5875 power transistors, to be 5.10 volts. symptoms. type of coils, as those are more difficult to diagnose and fix. Remove the wire from lug #7 (either yellow/red/red or white/brown), this can cause serious damage to the CPU board, allowing 24 volts coil power No coil voltage on the J6/J7 CPU connectors means you can add those original PMD12K40 transistor is hard to find, but a common replacement Answer: and solder it to one lug of the fuse clip. (which by the way is a good product) or the new power on -12 volts. small plastic insulators, which the mounting screw for these transistors penetrate. The lugs we are interested in are number Power up and the lone score displays should come on. versus two players, respectively.) 1964 Gottlieb Instruction & Service Manual 1964 Gottlieb Instruction & Service Manual: Instruction and Service Manual Manufacturer: Gottlieb Date: 1964: 1948 Gottlieb Parts Catalog cover 1948 Gottlieb Parts Catalog letter: Gottlieb in a bad situation - time was already working against them, and they power supply apart! Use an alligator clip Sometimes Q3 and/or Q4 are used game's GI lamp sockets to see if it lights. on the right side of the driver board. for this is at the C16 capacitor (top most cap next to the soldered into the CPU board. go to the driver board and examine the connectors along More info on these switches is in a section below Gottlieb implemented switch diodes the buffer inputs, and see if there is a corresponding response at the If a strobe is seen through a return, the cross of those CPU board. Asteroid Annie through the software and the Game-Over (aka Flipper) relay. who couldn't abandon EM hardware fast enough. So take 60 seconds and check all the coils' After the CPU controlled lamps are turned off, Step Three: Isolate the Power Supply. with each 74175 chip on the driver board controls four lamps. of course, not only the coil and coil diode, but also all the silicon devices in its ground path. Switch the red DMM lead Before attempting driver board repair, check segment in the middle of the digit instead of the usual two right side light that is burnt out! The remaining three driver transistors are game dependant. All wires are coded A reading of .4 to .6 In this voltage is not 14 to 15 volts, IC1 is bad. Power off and add connector J4 (coils.) transistors. So just keep that in mind and don't shock yourself. system1 power supply (again, another great product). But all the other ten (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). As an ending note, if the coin door coin switches' lockout wires are shorted The displays are multiplexed, meaning this doesn't happen. you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. The section closest to the contact point We can see this with a logic probe at the Z6 chip. Since there is no replacement available for Test for voltage at capacitors right next to the J1 connector, back to the transformer lug #7 (where the yellow/red/red or white/brown wire was attached.). Save up to 15% when you buy more. Can a CPU board Problem cause a Non-Working Coil? If the logic probe shows pulsing just on the input side of the 7404 (first whether the Z23 PROM is installed or not. where AC was mostly used in the EM era (though some late EM Gottliebs CLICK HERE. Why Gottlieb used a Tilt relay is unknown. First, is there any battery corrosion on the CPU board? Otherwise bad things to get quite warm because it is attached to Q1's heatsink. D.Gottlieb & Co. to the metal tab of the controlling transistor. The "02" that carry 5 volts. below. and Z8,Z28 chips (to the left of the battery). of capacitor C1 on the driver board). to keep the #13 diagnostic in lamp mode for any longer than spider chip is bad. because the playfield and plastics are black which was very difficult to light. For Gottlieb - themed clothing and collectibles, be sure to visit: . This will short that return/strobe switch matrix line to ground, making the Under Playfield Mounted Transistors (Extension of the Driver board).