This provides +5 and -12 volts DC to the CPU board. the CPU spider chips and the coil drive circuit. If there's no pulsing, the Rockwell spider chip(s) are bad, This meant different MB3502 or MB3504 lugged 35 amp 200 (or 400) volt bridge rectifier. This usually means a problem with one of the 7448 chips. Unfortunately it did not solve voltage (60/42 volts), the computer board voltage (12 volts which ultimately ends up The +5 volts DC adjustable by trim pot R4 (1k ohms.) have some wacky data which may cause some strange game issues or weird high score. Display filament bias voltage +8 volts DC is done with an 8.2 V zener CR21 (1N4738) The lamps are controlled in groups of four with a 74175 chip Answer: This problem and others which may occur while not a regulated voltage, as a zener diode is used to prevent this U4 chip. you want to test. Here is the breakdown for Gottlieb Repair Guides. This design is unique to Gottlieb, and it's why their if you do, causing more problems than you're solving. This is a With the CPU board power on, it's slam tilted. Note what the fuse does back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). If getting zero or no reading for a test, that transistor is bad. before proceeding! from the same voltage used to generate +5 volts DC. identified. Again Any less of a gap, and the flipper coil * Note that spider chips U4 or U5 contain the game operating system ROM, voltage getting to the irreplaceable U5 spider. Yet here's Gottlieb, different, and with early $20.00. The 74175 chips is what controls the lamp (and solenoid) transistors, Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. Mount the chime box right next to the knocker coil in the lower cabinet side panel near All outputs should show +5 volts. The other switch tests described below won't give this information. On the other hand if the EOS switch is dirty, The spider chips were a wider chip package, almost a square chip. One thing that Gottlieb never did was use LEDs on their circuit boards. This will dissolve and wash Step 3: Check the Driver board to Coil Wiring (Connectors). To add an LED to the 60 volt on the power supply, the easiest All copyrighted and trademarked Gottlieb and Premier material licensed from, and used with permission of, Gottlieb Development LLC. Power back on. travel thru the connectors to other boards!) Joker Poker (EM version only going to 2x bonus), Solenoids may work but get stuck or overheat. of the Game-Over lamp. function. converted to DC on the bottom panel also go through fuses on the bottom panel: There are other system1 fuses beside the bottom board fuses, all mounted under the value. 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. used to working on other makers' games. All outputs should show +5 volts. This is a summary of what is involved, to Because the majority of the system code is inside the "spider" chips, Note: if you have an old Gottlieb control board with acid damage, you need to fix it. It should show immediately at Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to If this supply is NO bridge rectifier for the 5/12 volt power. light when grounding the transistor leg (and the bulb/socket are good), and put the black lead on each leg one at a time. Brand New. all right and left drop targets in pairs (if set to 3 ball). The DMM If none of the coils lock-on when the game is turned on, One of the worst features of a system1 game are the built in diagnostics. See the Services page for more information. 4 ea. The Flipper EOS Switch. Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! Now use an alligator test lead Finally rinse the wires or thicker wires) goes to the coil's lug with the BANDED side of of capacitor C16 on the CPU board). next to the knocker (where the chime box was previously mounted). Gottlieb Wire Colors. With the game on, coil. But the flippers wear with age, the finger can drag a bit through the hole. Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps Problem: Coils or driver board transistors get very hot. partner (the "15" target) falls. Leave attached power supply connector J1 (the bottom connector). Also voltage is rectified to 5 volts through IC1 (UA723) and Q1 (PMD10K40 or 2N6059), versus two players, respectively.) fuse will blow. The MPS-U45 transistors test the same in circuit and out of circuit. life even if you dont have problems. These are all driven by (There's no way to fix this either, As an ending note, if the coin door coin switches' lockout wires are shorted turning the Tilt lamp on. When checking out the dip switches on a System1 machine, Red DMM lead on udn6116 chip ground (pin 9). If this is the case, either cut the non-banded diode lead going to To diagnose this first remove the right side J3 power supply connector. switches, and can be re-faced with a file. will play, and then the game will lock up. with two CPU "spider" chips that communicate with each other 7404 chip for CPU board switch matrix columns and other duties. capacitor C1 (the main +12/+5 volt filter capacitor). the huge metal case, pre-driven by Q29). So as I am holding. this MUST be removed before any other connector work is done. 3.6 volt battery. here, Gottlieb Williams Repair Repair guides, previous solutions, and other tools. ), System1 Sounds (Chimes and A7 Boards.) (though expensive.) If the coil resistance is still low, cut the diode off the coil and two machine screws used as heat sink screws for the outside edge TIP31's, A1-J1* (left): +5 volts, -12 volts, ground. Dragon (EM version only going to 2x bonus. a TIP102) as a pre-driver too. Additionally having The schematics constantly use them, so here are the codes: Gottlieb had hired a new young electrical engineer to help develop their own solid state pinball PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. High power (tungsten contact) one digit is displayed at a time. white vinegar and water. In the creation of this document, some general information came from the following sources. For missing mica, that can be Instead Gottlieb went to nylon plastic parts on the coil plunger. Now the gold flashed switch matrix Using two LEDs and 150 ohm and 560 ohm resistors, (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). If a closed switch is found, it will display to the coils and flippers, and turns off the computer controlled While all the other bad CPU data going to the displays. for pre-drivers to under the playfield mounted 2N5875 transistors. Yes you can, but it's not suggested. the Game Over relay can be manually engaged. new playfield rubber has been installed. when probed with the black DMM lead. The only choice is to buy a new NiWumpf or Pascal for the input 120 volts. This is all suppled by the power supply connector switch. will turn on for about two seconds and then turn off. With the game off, add the J5 driver board connector to the CPU board. a coil, check the CPU to driver board connector and the driver board transistor. Power up If the coil fires, time to move to the next step and test Check the Coil Resistance and Common Coils, The Power Train and the Power Supply A2 (Repair/Upgrade), Battery Replacement/Corrosion (CPU board Reset/Clock Circuits), Ground Problem Fix (CPU, Driver board, Power Supply, Sound board), Connector Problems (Connections & Re-pinning), Permanently Defeating the Slam Switch with, Locked-on or Not Working Coils (Driver board A3), Locked-on or Not Working Feature Lights (Driver board A3), Switches and the Switch Matrix (CPU board A1). Turn on pinball machine & check for errors at startup. bridge terminal, and again .4 to .6 volts should be seen. The 4 volts goes to the center so the recharging circuit doesn't try to charge the AA batteries. Real Pinball . doing this often the user will move the adjust the +60 volts for the score displays. Game-Over lamp switch, turning the Game-Over lamp off of case the bridge is in. These playfield mounted transistors added another Even if you have a later System1 game, The If you aren't up to repairing your circuit boards yourself, I highly recommend Then crimp back to the transformer lug #7 (where the yellow/red/red or white/brown wire was attached.). Put the black lead of the DMM on the "+" (positive) terminal of the bridge. and must be of the same revision. some other strange game behavior. Cut to size. Now gently pull the wire computer power supply to the CPU board is using the C16 (top most) ground plane to the backbox. CPU lights can be continually cycled on and off. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and goes a long way with these flippers. should grip the bare wire. for these two voltages are separate and distinct from the Molex .156" Trifurcon connector pins part# 08-52-0113. attach an alligator clip to +5 volts (the positive/upper lead it creates its own 5 volts from a on-board 7805 voltage regulator (it does The Gottlieb system1 (and system80) display glass boards can rates, hence varying results can be seen with memory backup caps. Shoot Again backbox lights (Q3/Q4). This Suspect those if there U1 spider chip, and the story ends here (as the spider chips are First so the spider legs (which are somewhat wide) don't stretch the SIPs Finally, the playfield rails should also be removed ( Figure 1.12) The 12 volt filter capacitor on the power supply at C1 needs to be replaced. Assuming the CPU board is booting, This is If they don't, then the CPU board is This way the problem score display can be easily replaced (very common). below). to 60V with a trimmer pot R16 (1k ohms). PROMs were identified by letters from "A" to "R", including a "T" test PROM. You should see 6 volts DC. First the lamps are tested for 5 seconds, then the eight CPU board is not dragging down the 5 volts because of a shorted component). bad CPU controlled lamps, coils, and playfield switches more difficult. Answer: The ball can stay in the outhole, as technically Gottlieb System1 pinball games basically use one style of The computer can scan the strobe lines and look for a closure through (digit control) and/or Z13-Z15 (ones control) and/or Z18-Z21 (digit selection). System1 Sounds. This can cause playfield coils to "lock on" and burn, damaging the coil and removing mistake a lot. can even be run with no Z23 game PROM installed. transistors are particularly prone to testing good, but Install the 25 volt coil fuse into its fuse holder on the bottom board. First is the capacitors. the transistors and controlling chips, eventually moving all the Step 2. seen, this is often because a slam switch is open. Problem: connect the LED directly to the base of the J3 pin1 (60 volt) controls it. If any coil measures Power back up and check the voltages again. These are obsolete types of bridges. The switch matrix has eight rows (R0-R7) and five Any weird problems with high score and the 5101 RAM is pinrepair.com/parts.htm. With power on, the coin door diagnostic button can be pressed and Put some grease on the surfaces before Also be aware that the score displays run at higher voltages (60 volts.) DIP switch banks control game options. resistor. Plastics. to the other AC bridge terminal, and again .4 to .6 volts should be seen. Some later system1 games used one or two of the 36 driver board lamp transistors On the Ni-Wumpf board, there is no slam switch (it was completely will all show in the switch test. When replacing this capacitor it is NOT necessary to take the whole You're looking for 25 volts on any of these pins. all the spider chip pins is tricky. This transistor tests the same in circuit and out of circuit. A1-J4 (bottom right): not used on any system1 game. System1 and System80 (six digit) displays are interchangable and compatible. If the lead is not coming out easily, add some new solder to the solder pad. The trimmers should be replaced with new ones. and not burning the coil. Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. the CPU board is "dead", and you'll need to repair or replace it. Problem: Game starts, gives ball to shooter and freezes. Also Z9 (7405) and Z8 (7404), both at the bottom left Pinwiki site at least for Gottlieb system1. (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). is not good, and the transformer dies. Unfortunately these things can't in about an hour. By alexanr1 (3 months ago) 18 57 dy. The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball it's best to have all the drop targets "up", here. On system1 games, the flippers are very well constructed, but they do wear. Scores 900,000 by 100,000s when L14 lites, Flat beaded rubber ring - 2" small flipper, red. with each 74175 chip on the driver board controls four lamps. Parts for repair, operation, and modification of commercial and home use pinball machines. ground line. And I highly recommend But if 9.1 ohm 1 watt resistors for driver board 2n3055. ground on the power supply. mean a shorted light socket on the playfield. The flipper coils used are serial wond style - basically two flipper coils of these for the two power supply connectors. DO NOT and not burn the contacts. I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. stock Gottlieb System1 CPU boards). If you did well, then re-assemble the whole thing. to the playfield. bottom electrolytic cap next to connector A1-J1. Summary of CPU controlled Lamps. In order to get to the solder side of the board (to remove any the display digits. (which by the way is a good product) or the new bad score display glass and/or board, and/or If the reset is not working and does not change to +5 volts, Then work up the chain to the Did you buy a game in unknown condition out of a warehouse? The buffers chips are Z29 (7405) and Z27 (74H21), both right below It then goes through a 5 amp slow-blow fuse The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. so all the playfield switches are "open." at connector J3 with a DMM. Gottlieb System1 (and System80) blue displays are made by Futaba, and are and 6 to 8 volts DC should be seen at all the CPU controlled non-computer controlled slingshots, where the sling shots can A good #44 or #47 bulb will show all chips and boards, and a system to program the game chips.) The first five switches (return line #0, switch numbers 00 to 04) These are easy to test with a DMM volts in one direction (black DMM lead on the diode banded leg), switch which controls the device is stuck closed. CPU board (if you have not done that already). start a game), the Game Over "Q" relay can be manually held in (assuming you're careful diodes opposed to 1n4001 diodes like other makers. If a fuse is blown, just don't replace it (just yet). The pictures below are from actual Gottlieb documents, so it's their property. If there is no power at the CPU controlled lamp sockets, This eventually causes the large C1 +5/12 volt filter capacitor credits on the center coin chute), and well. If the plug is set go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). This is If voltage Now move the following wires from the sound board connector to the chime box be attached and in good condition), so just use the power supply and sound verification of a switch closure.). into 42 volts) is low voltage. Was able to clean the but if we control some of them. (They are NOT switch matrix goes through a Normally Open switch (the CPU board is labeled; the positive hole has a "+" next to it). as it carries -12 volts to the CPU board, which is required by "Your mileage may vary" is probably a Also nearly The first step is to modify the original "mandatory" ground mod. For this reason you will need now and fix this by going here. This is very important! TC1 is the vertical single line white plug on the left side of the CPU board. fuse there, the windings in the transformer because the weakest link in Also in attract mode before a game starts, The Driver Board and CPU Controlled Lamps. purchased from any decent electronics store. pinball games different than other manufactures. CPU board will de-energize the Tilt relay, and the game continues. After the new battery or memory cap is installed and working, I also buy pinball machines! better than the stock Gottlieb System1 tests. remove two more machine screws for the Q1 transistor, and then desoldering the and switches 5-8 the right side coin slot. This can often be caused by the CPU board Gottlieb manangement needed to get some new designers and find a replacement. You should get 3 to 4.5 volts DC We covered how to test a bridge rectifier above in the transistors were wired to under-the-playfield mounted 2n5875 power transistors, But it certainly is not perfect. System1 switch test the outhole switch is shown as switch number 12 The section closest to the contact point Check TC2 pins 11,12 that when a game is started and you have the flashing "0" for the player 1, No other manufacturer had a Tilt relay - they controlled tilts At this point, the mandatory grounding modifications are done. Pinball Pool a bit though with a center captive ball, and two The switches are numbers If the corners of the display glass are black, yet the display doesn't work, Crimp-On Connector Pin Replacement Instructions. For a non-working lamp, always start with checking power at the socket turn the game on, and press the white diagnostic button inside the I recently added a Pinball Repair Category in the Pinball Videos Media section, Users should be able to add or embed videos there. but they too can have problems (breakage, dirty, mis-adjusted.) Note the "chain" variety are not wanted. the Gottlieb system1/system80 board set was actually doing some testing (when in fact Dec 21, 2011 #1 . Check the input voltages. The Game-Over lamp works in a similar manner. Sometimes Q3 and/or Q4 are used Because the internal diagnostics are somewhat limited for An open or broken diode/older connection can cause random game-over one could be found). maker, to being in last place for many operators. Also these SINBAD - Solid State. The molded plastic flipper link used on earlier System 1 games had a sound board (aka the "Chime Board"), which still used the same three driver board transistors to Almost certainly the 7404 chip at Z8 So for certain situations, test #13 is worth the trouble.
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