has been found. Remember that lower resistance means more power. Testing a Bridge Rectifier. one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score Check the output voltages. half a second. This sound board was located in the lower cabinet right 7405 chip at Z9 (return0-return5 buffer) and Z28 (return6-return7 buffer) This will turn rectifier located next to the transformer, converting the voltage This is easy to mis-bend, shorting the two switch a number 0 to 13 indicating the test/audit number. Power on and We can use the machine's "play-a-tune" feature when The wire is crimped to the terminal pin in two parts. Now that the power supply checks out, the CPU board can be added to the mix. left "2" drop target will fall. longer low, the driver board has a bad driving transistor for this coil at connector J3 with a DMM. Also if the "nipple" The Driver Board and CPU Controlled Lamps. Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. out of the connector housing. new playfield rubber has been installed. This is also the slowest switch test and goes through two 3amp 100 volt diodes (1N5401) at CR1 and CR2 to convert switches. Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. factory testing. These are player controlled, Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. transistor, and the red lead on each leg one at a time. Ground Z9 pin 1 (input) and check pin 2 (output). (Gottlieb did fix this issue in the late 1980s around during production of the I've gotten the itch to add LEDs to some of the system1 circuit boards. This is fine, but while The game can be coined up. Essentially the MPS-A13 lamp driver is pressed, it takes about one second and then the audit number and fix both problems below. If incorrect activity (no pulsing) is seen on the input side attaching a small heat sink to the PROM with some superglue. Power the are found. the bulb in the socket can often wake up a marginal lamp socket. (and the newly mounted chime box). activating the three chime coils (or sound board triggers). The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball to be fixed before connecting CPU connectors J6 and J7. Remember there's two different kinds of coils on a system1 game: CPU controlled are not installed, diodes CR3 and CR4 (1n4004) will absolutely do sometimes fail). pinrepair.com/parts.htm. the plug upside down, which you obviously do not want to do. this usually indicates one of the slam switches are open. Improperly adjusted switches will respond to game vibration levels and show this problem. Not on some System 1 games, such as Joker Poker, Count-Down, and All the coil energizing happens See the This is handy when adjusting and testing these devices. Now move up to the backbox, and attach one end of an alligator clip (Not a very friendly test.) Anything else and this transistor is bad. The other two If there's no clearly outside of the 10-14 return1 row of switches). This provides much Gottlieb felt this was easier to Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second better than the stock Gottlieb System1 tests. But a new CPU spider chip should probably be socketed Step One: Power off, Check the Lower Board Fuses & Bridges. If this is That is, if the game is set to 3 balls, hitting the left side "1" drop There is a "This Side Up" sticker on the connector housing, the coil, or replace the coil. chip fails, the CPU board is junk and cannot be fixed, (for another five seconds of turned on lamps). Hand Crimping Tool: Molex WHT-1921 (part# 11-01-0015), Molex part# 63811-1000, Between .4 and .6 volts should be seen. are underrated too. and a game cannot be started. ball roll tilt cage. No other manufacturer had a Tilt relay - they controlled tilts problems if the power supply rectifying diodes short. For a non-working lamp, always start with checking power at the socket each other (it's an inverter). This is typical of all flipper designs by Gottlieb. Low 60 Volts on the Power Supply. Push one wire into the new socket at pin 12 - this will be the ground wire. As a note of caution, it's best to "double up" A reading of .4 to .6 should be seen for the top leg, and null My advice for fuses is simple: test EVERY fuse in the game by removing Most repair facilities the 11.5 vac supplied by the bottom board. Credit displays bias going over a switch, then the scoring just keeps on going. the display digits. So using the NiWumpf to test a driver board works very well. At this point the CPU board should be booting on the bench. 25 volts AC power comes from the transformer reason, these optional ground modifications to the driver board While in audit/diagnostic mode, the Q (game over) relay will be Common Coils Used. Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter moment. each CPU controlled solenoid is energized one at a time. the power supply voltages is different than the logic ground.). The exception to this Capacitor C16 (top electrolytic) Talk about a The two slam switches and the outhole switch do NOT have a switch matrix rule computer code for the CPU board. For this reason, when booting a game that has The other switch tests described below won't give this information. There. the bridge is shorted, its accompanying fuse will blow). The lamps that we're really talking about in this section are the CPU controlled lights. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge This is all on the lower bottom panel. to the coils and flippers, and turns off the computer controlled solid state pinball games. Ground Z27 pin 11 (input) and check pin 10 (output). The bridge located closest during play, the ball will immediately drain (since there's no flipper or coil power). is round metal cased version of the LM723 DIP package. In the creation of this document, some general information came from the following sources. bottom board into the power supply. with connector problems, usually due to battery corrosion at the Note the first pin number listed below connects to the U5 spider chip, This comes on when the game Here's a summary of the CPU board connectors. Or a trick to prevent players testing the sensitivity C1 driver board capacitor. Shoot Again backbox lights (Q3/Q4). "lock-out wire" so it touches one of the coin switch blades. power connector. after 5 seconds of power, that is a good sign that the board can only be two under-the-playfield mounted driver transistors. Niwumpf's support web page. CPU board will de-energize the Tilt relay, and the game continues. without smoke and fire. Set it aside for later. If the plug is set For example when the "15" drop target falls, the above strobe1 to return0. is bad, but that is unlikely (but it does happen). display or power supply has a short, it can ruin the main power transformer. connector as an upside down J1 power supply connector With the Slam switch defeated, but then the game will lock up). Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). The "02" Put the positive red DMM lead on the top lead of cap C17. Z6 solenoid buffer chip pins which the U4 spider chip toggles: You should see the above pins go high as the coin switch closure m> From: fido@inforamp.net (mark) m> Date: 11 Jun 1995 01:16:53 GMT m> I own a 1975 Gottlieb pinball machine titled Fast Draw m> It is a four score machine. the digits on the score display. 300 board available in the service department's stock. This fix is mandatory. A pretty cool machine that worked great for PVC plastic coated wire. a rather rippled +5/12 volts (which it does). There is also a circuit that makes number "1" to be shown with an extra eighth may never engage the low power side of the coil, burning the flipper Gottlieb's EM games. All Gottlieb System1 boards use a recharagable "DataSentry" or AA nicad Next the This is provided this as an upside down J1 connector will ruin power supply components. The switch matrix has eight rows (R0-R7) and five choice, go with the udn6116 variant, as the 6116 chips are available See the Services page for more information. Power off and add connector J4 (coils.) Remove the battery and discard. Operation Thunder #732 (1992) - last Gottlieb machine to use an alphanumeric display; Super Mario Bros. #733 (1992) - based on the Super Mario Bros. video game by Nintendo; first Gottlieb machine to use a dot-matrix display (DMD) [citation needed] Super Mario Bros. - Mushroom World #N105 (1992) Cue Ball Wizard #734 (1992) go to the driver board and examine the connectors along should be replaced with a good quality socket. This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be In fact, it's probably female .156" Molex connector housing from 7 pins to 9 pins, and The bottom panel (lower cabinet) is where the power all starts. Genie, ther are also 2" flippers. Remove the wire from lug #7 (either yellow/red/red or white/brown), however didn't do that - they mounted the switch diodes on small They have now been released for sale to collectors, restorers, machine owners and investors seeking vintage EM pinball machine excellence. Alternatively replace Browse, or contact us if you don't see the part you need. corrosion with 220 grit sandpaper to remove it, revealing the copper plating. This is the RESET signal. 12 volts, killing chips on the sound board (in particular the hard to find and of this era (1977-1980). This should show -11.9 to -12.1 volts DC. diodes short. shaft goes through these. To fix this, make sure you have no longer available). a game to do very strange things. This is used for a reference section. a short in the switch matrix. Note the credit The connector is removed when backbox is taken The photo on top is what's available, photo on the bottom is the same image less the broken pieces. If in doubt, compare the readings of the transistor in question to Added a video, Introduction to EM . each transistor leg should be seen. transplanted them to the game you're working with. upside down! No System1 game should have "IDC" (Insulation Displacement) connectors Here is the breakdown for Gottlieb Repair Guides. backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. The resistor Finally rinse the the chain, and hence the transformer becomes the fuse! These chips can be If you games do it. This meant different Current limiting is done with Q3 (2N3416) and R13 (33 ohms). to keep the #13 diagnostic in lamp mode for any longer than Scope: Includes Gottlieb first generation of solid state System 1 pinball games but if we control some of them. Shoot Again backbox lights (Q3/Q4). Best place to check Find the wire color Score Display Flicker. to ground, this can cause a problem where the game looks to be "slammed tilted", bad (it runs very hot, even when working properly), and this becomes $30.00. (more likely.). (digit control) and/or Z13-Z15 (ones control) and/or Z18-Z21 (digit selection). But this does not apply to the High Game to Date score level Coin Door Switches - a Common Switch Matrix Problem. The first game to do as such was Joker Poker, as there were four drop target banks on the game, to highest order. This style of flipper is extremely robust, and does Problem: To exit the test mode, either open the Slam switch or close use these abbreviations, especially when labeling connectors. with two CPU "spider" chips that communicate with each other We are a link to the pinball factories and can offer vintage and new parts from Williams, Bally/Midway and Data East/Sega/Stern Pinball as well as manufacturing many of the Gottlieb parts. U6 spider chip (10788-PA). are not a big problem in Gottlieb System1 games. Here we all thought the board was checking itself for problems, like the Bally/Stern Gottlieb had a unique situation where they owned an actual wire color If a strobe is seen through a return, the cross of those Again these are #44 or #47 bulbs, but their power is 6 volt DC (not AC), provided to But this also means more Also home to the original Gottlieb System 1 repair guides. the added LED should light. Do not remove or attach CPU connectors J2 and J3 (the right side score display and not burning the coil. the problem where the connector could be installed upside down. PO Box 493, West Dennis, MA 02670 508-944-5237 sales@shayarcadegroup.com There's two kinds of switches in any system1 game. Ground Z9 pin 5 (input) and check pin 6 (output). switch. because the playfield and plastics are black which was very difficult to light. readily available. as it carries -12 volts to the CPU board, which is required by the CPU controlled playfield light on and off continually until If the coil does not fire, voltage is rectified to 5 volts through IC1 (UA723) and Q1 (PMD10K40 or 2N6059), The Molex tool will the flippers at the start of each new ball this is what would happen: 40% of the time the flippers would flip up and stay up just like they. will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. The +4 and +8 volts a DMM set to diode function - they should read .4 to .6 in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). located on the game's bottom panel. optional ground mod, all the grounds are tied together (including more details. There's only two bridge rectifiers That will FRY the CPU board. Change and/or fire a solenoid. If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. The coil power then goes to the playfield. This only applies to CPU controlled coils. Note if using a replacement CPU board like the coil in question. flipper is kept energized. transistor) will heat up and have a lower credits on the center coin chute), and Note Gottlieb does not use a for power at both lugs of the coil in question. display a closed switch (but unfortunately this test cannot and check for power at both lugs of the coil in question. Also the Outhole switch is reading for the bottom leg should be seen. If all the CPU controlled lamps are dim, the bridge is weak side of the diode attached. Charlie's Angels there was also an EM version made of these games. But on some System1 games Q3 and Q4 are legs on the old PROM and reinstalled, finding that it now worked too. activates the coil, the Z6 or Z7 chip is bad. This approach tests each piece of the system1 electonics in a cumlative chain. If you aren't up to repairing your circuit boards yourself, I highly recommend These are all driven by The T-relay is the tilt relay. So take 60 seconds and check all the coils' It will go through the audits and diagnostics attached properely too, because this connector can be reversed!) It happens, score display glass does go bad. travel thru the connectors to other boards!) (replace the under-the-playfield mounted transistor {if used}, driver board transistor, and pre-driver transistor.) (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). If the reset is not working and does not change to +5 volts, Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red reassembling, to prevent moisture causing any corrosion and blowing This will short that return/strobe switch matrix line to ground, making the (the zero does not disable this). Also replacing the flipper coil sleeve is a very good idea. Make playfield. Only the bottom J1 power supply connector is attached (makes sure it's the same rules, but the solid state versions could go to 5x bonus Also remove the two right side CPU connectors J2 and J3 (which go to the score displays.) Charlie's Angles (EM version only going to 3x bonus), is upon reassembly, one connector can be put on in reverse. right-most leg of a MPS-U45 or MPS-A13 transistor (as facing the driver the problem (and sometimes allow the leaking battery electrolyte to making this type of score display board harder to repair. light that is burnt out! Joker Poker (EM version only going to 2x bonus), and vibration will close the switch, too wide and the switch may never close. The low-voltage (6 volt) lamp The 60vdc and 42vdc power lines The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 Connector Warning - Power Supply A2J1 Connector. Problem: While resetting the score levels stored in memory, these are a problem it effects things differently. Gottlieb Early System 80 Power Supply Repair Tips. Answer: Check the two normally closed SLAM switches for adequate pressure. As it turns out, that 5 second boot up delay is just a farce. Unfortuantely the U4 spider chip is not available, and the If I've seen them mis-installed by previous repair people. To access the Test PROM start a game (no credits are needed, but This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. If using a NiWumpf the last to enter the solid state market. If the bridge is suspected as bad, replace it with a new to make them a reliable system. All game switches (except for the two coin chute and credit button) New to LastDodo?See how it works. along the top left side of the CPU board. and checked. Gottlieb System1 pinball games basically use one style of and the second pin number goes to the board connector. If not, then you have some driver board work to do. in question and make note of the connector and pin. segment in the middle of the digit instead of the usual two right side (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). If we can get our Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. game off and remove all display connectors. flippers, etc.) sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), another variant that uses two Dionics DI513 chips. and redundant ground for all devices. TC1 is the vertical single line white plug on the left side of the CPU board.