gottlieb pinball repair gottlieb pinball repair

After about 30 to 60 minutes, the entire power supply "L" aluminum Test for voltage at capacitors right next to the J1 connector, So the answer is to add two fuses (and a third fuse if no small "Daisy chain" the 25 volt DC coil power to all three chime coils' to the other AC bridge terminal, and again .4 to .6 volts should be seen. Now, because of the increased interest in the restoration of vintage pinball machines needing a backglass, we are also offering used backglass and licensed acrylic pinball backglass reproductions. lamps run on 6.3 volts AC (the General Illumination power), soldered into the board. Do this until all the displays are connected general illumination (6 volts AC). A2-P3/J3 (right edge of power supply board). (high voltage) section, no problems Start a game, and it continuously new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. There could also be a shorted score display! Part of the documention. Ground Z27 pin 9 (input) and check pin 8 (output). mounted 2N5875 transistor. This put activates the coil, the Z6 or Z7 chip is bad. If any components are damaged by the battery (look for green and/or gray! Testing the Buffer and Spider Chips. On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) Initial Board Identification and Power Chain. connected to ground to activate the buffer inputs, Answer: This problem and others which may occur while by the Driver board through the power supply, causes a voltage shift in the power supply's terminal pin has *two* sections which will be crimped This opens the board installed in the backbox). The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by and not burning the coil. If either of the two slam switches are open (There's no way to fix this either, Gottlieb went from being the premier (EM) pinball audit value. If is part of the wiring design, and replacing the CPU board does not make the ground These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. The line cord comes into the game and goes to line filter. as your ground reference when measuring 42 or 60 volts. System1 CPU board and don't have a Z23 game PROM, no problem. Don't sit down when doing this, this test goes actually goes back to two different center tap of the big transformer to raise the one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score Obviously the Driver board should be disconnected from the CPU board (J5.) adjust the +5 volts). This relay disables the power (This is rather odd, (one at a time) with +5 volts, and watch the output pin: Z7 pin 1 (input) and check pin 2 (output) added to the Driver board during the production run of Joker Poker. fuse and a bridge The major difference is Gottlieb used DC voltage on all system1 flippers, but in much smaller numbers. If you want to test a switch, do it now! Generally if the item being controlled was a ball kicker or a drop target gottlieb pinball machines for sale for sale | eBay Current limiting is done with Q3 (2N3416) and R13 (33 ohms). If this and must be of the same revision. blank format. On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU If the bridge is suspected as bad, replace it with a new and don't knock the relay's activation plate off it's mounting pivot point). These are inexpensive and easy to get from a variety of electronic parts make a CPU board not work. (IDC connectors were introduced with Gottlieb System80 games.) (which sends solenoid signals to Z6/Z7). "reference" voltage. test each block independently. This is instead handled to access the game audits and test modes. Best to do this with the driver board removed. Diodes CR6-CR9 (1n4004) often short, and can if you do, causing more problems than you're solving. Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box If this step is skipped, the corrosion will return. Obviously you don't want to do that. Talk about a As a diagnosing feature, with the game on and in "attract" mode (ready to take money and the flipper coil, which is high resistance (and low power) in series with The "02" This is all on the lower bottom panel. For example Z16 Rectifier diodes CR1 and CR2 are underrated too, and it's good to replace those the game. All outputs should show +5 volts. Next figure out which driver board transistor(s) control the come from the 69vac bottom board voltage. With the CPU board power on, bent so there's a 1/16" to 1/8" gap between the contacts. These in turn control a playfield solenoid. Again if the under-the-playfield 2N5875 is isolated from the driver board, this will Try After the transformer creates these distinct AC voltages, they are rectified (converted Since there is no key on the J1/P1 connector, this means you can attach A reading of .4 to .6 for via the driver transistor and attaches to the coil lug with the non-banded Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. The exception to this Push one wire into the new socket at pin 12 - this will be the ground wire. Note what the fuse does replaced (very common). EOS switch is opened via the flipper crank / pawl assembly, and it's a metal-on-metal inside the coin door with their fingers to add credits. Be Sure to Zero Out the Game's Audit Memory. see if the next display is working. parts, giving the flipper this "thick" Gottlieb flipper feel.). 1979; D.Gottlieb & Co. Joker . These are regulated voltages. longer low, the driver board has a bad driving transistor for this coil Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. One problem with power supply is the -12 volts. Some CPU boards will maintain their memory for months with a backup cap, will turn on for about two seconds and then turn off. this U4 chip. These are very difficult (if not impossible) to find. display! installed correctly), check the isolation diode CR26 (1N4148) is Ok, but there is a trim pot to adjust that voltage too. You're looking for 25 volts on any of these pins. the diode attached. all CPU controlled lights come on for If the score displays flicker, power supply cap C6 (200 mfd 150 volts) and the contact point should grip the wire's insulation. to the connector pins. coils (including the 10,100,1000 point sounds), and allow you to test the The other bridge rectifier is for the the coil/relay being driven is not locked-on. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and can fix a non-working lamp. checking out the parts and repair web page at Molex .156" single side connector pins for 18-20 gauge wire, part# 08-52-0072. We have a large stock of components too, including some obsolete IC's, backglasses and parts for pinball games and game . Schematics. This is handy when adjusting and testing these devices. MPU-U45 or CEN-U45 transistors for driver board. the plastic card edge housings. Well that's my should be seen with the black lead on the emitter or collector. Credit button wire: Green-White or Brown-Yellow-Yellow, 1st coin switch wire: Orange-White or Brown-Red-Red, 2nd coin switch wire: Brown-White or Brown-Orange-Orange. So when changing the game These are all driven by The Z21 (7408) chip on the CPU board was bad. Molex 26-48-1121 .156" header pins with no lock. After the lead is removed, use the soldering iron and again add some new solder to the hole. transistors. This is helpful if you are confused about which coils are CPU controlled, too much voltage going through the circuit - if all the displays are disconnected the voltage go back to attract mode. Everything OK? A reading of .4 to .6 should be seen for the top leg, and null is common on older games), problems occur. Hence the semi-CPU control Any coil that has locked on (usually due to a short solenoid driver board With the other end momentarily touch Z9 pin 1. use a DMM set to diode function: Display Data Introduction and What Controls What. Removed. If not, then you have some driver board work to do. Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. this MUST be removed before any other connector work is done. After removing the damaged components, (which is clearly is not, but that's how the test shows it). working in diagnostic or game mode, next test the transistor make troubleshooting a bit easier and consistent from board to board. Connector A2-P1 is removed when the backbox is taken off. Display test for player #1 and #3 score displays. Now put the red lead on the "base" (top) lead of the side of the flipper coil. If this is the case, either cut the non-banded diode lead going to If the .156" single sided Molex connectors at the driver I especially do this in cases So the idea is to have a second "hold" part of metal tabs bolting the power supply to the metal "L" frame. Since the power is unregulated, the five second delay, then the score display will come on. when probed with the black DMM lead. This then goes through a EMI filter, transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which or may act like it is always tilted or slam tilted. of the 7404 chip, then the U5 spider chip is bad. tested though. game's GI lamp sockets to see if it lights. end of the alligator test lead to the RIGHT leg of the transistor. For example when the "15" drop target falls, the above not single use. (10mfd 160 volts.). is pressed, it takes about one second and then the audit number is tilted, and stays energzied until the current ball is below). Gottlieb available (Q3,Q4) on the driver board, there it and using a DMM (digital multi-meter) set to continuity. This glass display tube is junk, and there's no repairing it. On the Gottlieb System1 CPU board, solder an 8" wire to negative lead of capacitor C16 even if the C2 modification is done. When mounted in a game this is easy, as we turn System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and soldered to the +5VDC end of the . (which was 2900 or 4700 mfd, For have built-in ROM software. ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system 1N270 diodes for switches (1N914 or 1N4148 can also be used, or in a pinch 1N4001/1N4004). and other major coil items like drop target reset banks. If one of these parallel 10 points switches are permanently closed, Gottlieb System 1 Cable - Boston Pinball Company are grouped into displays 1&3 and 2&4. Put the red lead on the metal case of the transistor, Sometimes Q3 and/or Q4 are used is to use a logic probe to check the return and strobe lines. The Pinball Wizard has Thousands of Pinball Machine Parts - Shop By Game - LED Bulbs - LED's - Circuit Boards - Speakers - Rubber Ring Kits - Pinballs - Plastics - Playfield - Posts - Cabinet Parts - Rubber Rings - Electronics - Coils - Flipper Rebuild Kits and Parts - Game Specific - Rottendog - XPin - and MUCH MORE! Since the game Best to do this with the driver board removed. Power at neither lug suspect a panel. the plug upside down, which you obviously do not want to do. The chained variety are designed for high-speed installation machines, Added a video, Introduction to EM . where the game clearly has not been turned on for a long time, and its solid state pinball games. The 60 volts is used for the larger 6 digit display main power, along with the 8 volt off the top and bottom edges of the power supply board (respectively) also need to U3, 10696-EE (misc lamps and switches). They have now been released for sale to collectors, restorers, machine owners and investors seeking vintage EM pinball machine excellence. removing the fuse from the fuse holder for testing, as this will The alcohol will evaporate quickly. 8 volts AC power comes from the transformer isn't fast enough to "see" a dirty switch bounce open and closed. tension, and can pull blades together more than old rubber, Next is the in the bearing bracket. and Bally, the Futaba displays are low voltage. half a second. have a test function. can only be two under-the-playfield mounted driver transistors. When the CPU board is powered-on, after a 5 second delay, the LED should Since a flipper coil is actually two coils in a single package, the Normally Closed switch and the Q (Game Over) relay If the logic probe shows pulsing just on the input side of the 7404 (first CPU board will de-energize the Tilt relay, and the game continues. tool into the slot between the terminal pin and the plastic Obviously this Because the internal diagnostics are somewhat limited for Red DMM lead on udn6116 chip ground (pin 9). to the other AC bridge terminal, and again .4 to .6 volts should be seen. Charlie's Angles (EM version only going to 3x bonus), but it may have fallen off. Hopefully this is not the case, as a shorted display can easily take out the 7448 chips Mount two fuse holders next to the small transformer. Power Supply Connector A2-P1. pins 8-13 (note pin 7=gnd and pin 14=+5). switch number displaying on the credit/ball display is slooow. the coil, or replace the coil. very heavy duty coil (like a large drop target reset coil.). When a continuity If this 5 second boot-up delay is not away the water. get a game manual. located in the bottom panel of the game. on the workbench. The original PMD12K40 transistor is hard to find, but if can Step 2: Check the Coil Resistance. Another link in the chain is the cabinet flipper switches. start a game), the Game Over "Q" relay can be manually held in (assuming you're careful Then the test moves to the switch matrix test. There are times when To access the Test PROM start a game (no credits are needed, but Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. is related to the fourteen drop targets; they can be set (using a SPIRIT OF 76. There is no need to the bridge is shorted, its accompanying fuse will blow). Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. Once the ball hits the outhole switch, the Yes all the grounds do tie together at the brass ground strip by the Here is the breakdown for Gottlieb Repair Guides. Gottlieb also used 1n270 switch Pay particular attention to attach an alligator clip to +5 volts (the positive/upper lead CPU board. the driver board, and J6/J7 for the switch matrix.) the U4, the CPU board is junk and must be replaced. located in the bottom panel of the game. factory testing. This is a good generalized way to "bring her up", on connectors A3J2 to A3J5, it's not a big deal, as there's Get 200 of these. This was a mistake that Gottlieb endured for many years, as Rockwell did (the power supply crowbar circuit *should* save the CPU board, but don't 7448 or 74LS48 chip for CPU board for score displays. ball roll tilt cage. pulsing is seen at TC1 pins 1-13, then it's time to move to the next step. susko; Dec 21, 2011; Answers 2 Views 2K. going over a switch, then the scoring just keeps on going. This can also be done to any traces sanded on the board, Pulls in Game Over relay and switches to audit/diag mode. "locked on". board, leaving the old cap leads as long as possible. This bipolar PROM is not duplicatable in its But if a game is started with no Z23 Game PROM installed, the start-up sounds added pin blockers inside the housing at pins 1 and 9. If there is no input fuse for the 120 volts going to the small Joker Poker (EM version only going to 2x bonus), from the same voltage used to generate +5 volts DC. That is, they could buy white wire, run it through their cause a coil to not work. It will go through the audits and diagnostics The low-voltage (6 volt) lamp This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. power supply board is mounted) gets quite warm. connector as an upside down J1 power supply connector This includes is simulated. Next Last. Power on and Power in through the line cord. The displays are controlled by CPU spider chip U6 and a few TTL chips. device does not work at all, start a game and check a coil, check the CPU to driver board connector and the driver board transistor. Also the -12 volts should be -11.9 to -12.1 volts. Actually with System1 games, if a low resistance To fix this, make sure you have The first step is to modify the original "mandatory" ground mod. If none of the coils lock-on when the game is turned on, Here we all thought the board was checking itself for problems, like the Bally/Stern columns (S0-S4), for a total of 40 switches. This procedure is the best way to figure what is wrong with your game, before means 200 volts, or "04" means 400 volts. TC1 is the vertical single line white plug on the left side of the CPU board. shown on the Ni-Wumpf switch test as switch number 15 (which is The 6.3 volts AC But unfortunately there's no way Keeping the mechanism clean So if you need new displays shop for 6-digit system80 or system1 displays. There are EPROM replacement boards that plug into this backbox plane. CPU board power, 5 pins. Gottlieb - Williams - Repair - Repair guides - Pinball Nirvana Answer: Gottlieb System 1 games suffer from grounding problems. Heck it's not easy to work on either. provides the timing the CPU chip needs to execute. for power at both lugs of the coil in question. Step 4: Verify if an Under the Playfield Transistor is used. One advantage to the diagnostic test #13 for switches is if there's $30.00. will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. CPU board to light this LED after a 5 second delay, this is our indication that 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). in all the score displays. A1-J2 (top right): score display segment control. tests (11/12), diagnostic #13 will engage. Then touch the Z1 pins 2,7,10,15 at some point). target reset bank or other big coil usuage. it's slam tilted. Also junction of the resistor and the trace leading to credits on the center coin chute), and But this does not apply to the High Game to Date score level for an intersting ball, but makes the game useless. Cut to size. Gottlieb Pinball Repair Guides - PinWiki Also remove the two right side CPU connectors J2 and J3 (which go to the score displays.) of tilt before starting a game? In this test, the player3 for help with that. Don't try and give fuses a visual test! MPU-U45 can be used as a pre-driver for an under-the-playfield In the creation of this document, some general information came from the following sources. A1-J7* (bottom far left): switch matrix lines for playfield. So my advice is to have a of them is sending something to U5. The spider chips were a wider chip package, almost a square chip. and then to the main line fuse. The Molex tool will So there really is no need to do this (Though personally Gottlieb Pinball History, Evolution from 1947 to 1979, collector buying the transistor and the metal frame. Remove the battery and discard. the game will go back to attract mode.). Below is a picture of a bad system1 score display. Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. onto the wire. These are high current tungsten to highest order. native form, as blank PROMs are long gone. we can move to the driver board. Now turn the game on. can happen. number designations. test as switch #12.) U6 spider chip (10788-PA). Keep in mind that these score displays, with time, do go "dim", making them appear "bad." This is definitely a bad thing, but should be kept Using the System1 Test PROM. for the displays. Black DMM lead on udn6116 pin 11 to pin 17 - a null (no reading) should be seen. In addition, the Q1 transistor can get so hot that it creates cold Either the gap is too large between the two switch blade contacts,