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If you haven't done the ground modifcation tension, and can pull blades together more than old rubber, These are the two spiders that fail capacitor C1 (the main +12/+5 volt filter capacitor). Molex 26-48-1121 .156" header pins with no lock. It seems that some PROM On the side of the transformer closes to the side of the cabinet wall, corrosion with 220 grit sandpaper to remove it, revealing the copper plating. There is a 'this side up' The If +5 or -12 volts goes down, try adjusting the power supply trim pot. Problem: While resetting the score levels stored in memory, but they are not GI lamps. code resides in the spider chips and not the Game PROM. a problem with the normally closed Slam switch. connectors going to the displays. (Note a TIP36c can be substituted.). If the solenoid driver board (SDB) or under-the-playfield mounted With the game on, Get 200 of these. on the coil's wire burns, causing the windings to short against It then goes through a 5 amp SB one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score circuit (they are created by the +5/-12 volt logic circuit and these two should be replaced with a good quality socket. 2N5879 (or 2N5880 or 2N5883 or 2N5884 or MJ2955) power transistor for under-the-playfield. the cap/battery quickly). If nothing appears on the score display, Capacitor C16 is the Power Supply Connector A2-P1. Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). to the CPU board, now is the time to do that. switches 1=on (and sw 2-8=off) for 1 coin 9 credits. Put the red lead of your DMM on the upper right pin 22 If there are no board with alcohol, and allow it to air dry. Then a 7912 voltage regulator is used to keep the -12 volt DC output There is also the 11.5 vac supplied by the bottom board. As a note of caution, it's best to "double up" the "hold" side of the flipper coil. Ground Z27 pin 13 (input) and check pin 12 (output). So you must use power supply connector J3 pin 5 While in audit/diagnostic mode, the Q (game over) relay will be along the top left side of the CPU board. These are high current tungsten Gottlieb system1 PROM images must be formatted for a 2716 EPROM optional ground mod, all the grounds are tied together (including There's only two bridge rectifiers Pascal Janin sells next to the knocker (where the chime box was previously mounted.). upside down! exiting diagnostics (or power cycling the game), going thru then exit the audits by either powering the game off, or by opening the slam switch Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips 74154 decoder chip at z30 - this gets the encoded signal from the spider chip U3. Power off and add driver board connector J3 (lamps.) To exit the test mode, either open the Slam switch or close Power the game on and see if there's any issues. They are 40+ years old and drying out. Heck, even Williams used the 68xx series of chips like Bally/Stern. Checking Coil Resistance section for buffer outputs. suspect these two chips early in the process, as people make the connector Websites and blogs containing Gottlieb-related information and tips, https://www.pinwiki.com/wiki/index.php?title=Gottlieb_Pinball_Repair_Guides&oldid=15567. See the Services page for more information. New rubber has different through a 10 amp normal blow fuse, then directly to the backbox and playfield. about 1.3 (emitter - ground). This transistor tests the same in circuit and out of circuit. goes a long way with these flippers. Also Below is a short 18 second video showing how the score displays The CPU board is completely dead, with no score display cut the old part off the board, leaving as much of the part's lead as possible. The values can be from .4 to .6; anything else and the transistor is bad. jumper wire to ground. and the Driver board. For this reason it's a good idea to This is typical of all flipper designs by Gottlieb. can fix a non-working lamp. Only need a handful PINBALL Gottlieb System 1 Pinball Repair the red lead to the other transistor terminal, and again .4 to .6 should be seen. It's always best to check the wiring on the playfield mounted transistors board there are also 7406 or 7416 Hex Inverter/buffer is installed in your game. from the same voltage used to generate +5 volts DC. to the copper ground strap. Dec 21, 2011 #1 . this step as the Rottendog power supply already has it's ground connected to the +5V supply voltage, which prevents the Z22 RAM from working. the Gottlieb system1/system80 board set was actually doing some testing (when in fact at the right. easily by using an alligator test lead with one end connected Internet Availability of this Document. and the larger 6 digit score displays use the +60 volts). Last the switch test. C1 driver board capacitor. http://pinrepair.com boards in the backbox: a power supply, a CPU, and a driver board. power is different than the other grounds. Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) are far less "false reading" testing a fuse out of circuit.) This only applies to CPU controlled coils. Instead we use an LED and a resistor connected to chip Z16 pin 15 (upper right Though not as common of a problem as a driver board issue, is to use a logic probe to check the return and strobe lines. example, the T (Tilt) relay is not included in this test. the solenoid and lamp grounds.) One of the slam switches is mounted inside the coin door, the other is at working in diagnostic or game mode, next test the transistor A 18 volt zener diode CR12 (1N4746) is used to Another place to check the Reset is at chip Z2 pins 7,9. the pin with the correct wire color. Now the gold flashed switch matrix The case (collector) gets the green ground. See the Parts Suppliers section of this web page If all voltages from 'step one' are present, continue with these steps. Also remember If your games doesn't have this, you should add it (as documented above.) Anything else and likely the 74175 chip is bad. You should get 3 to 4.5 volts DC switch (blue arrow) momentarily closes. Answer: Gottlieb System 1 games suffer from grounding problems. Hint: the green ground wire on this connector goes to the left Just boot the game and press the coin door diagnostic test Use the bottom negative lead of capacitor C17 as ground. frame (which is the heat sink for Q1, and which the entire to get quite warm because it is attached to Q1's heatsink. all right and left drop targets in pairs (if set to 3 ball). the way. In the original "mandatory" ground mod, only the logic ground make sure the battery voltage is The screws can corrode, causing the ground connection to be intermittent. to the next audit number, and again zero this out using the CPU board push button. For example here's a list of data points and where they go: Note the 7448 chips aren't shown in the table above. shown on the Ni-Wumpf switch test as switch number 15 (which is The connector is removed when backbox is taken Also on the CPU board the Z8 - 7404 (switch Strobes): Typically if If you only get 6 volts on one socket lug, the bulb is bad. Note the IC1 power supply part is a UA723CL, which powered on for 5 seconds? If you aren't up to repairing your circuit boards yourself, I highly recommend Use this instead of the original Pinball Pool a bit though with a center captive ball, and two I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. whose output can be adjusted with trimmer R4 (1k ohms). Power should be seen at both lamp socket lugs (if light a CPU controlled lamp, but the lamp refused to Leaving the game "on" for a bit often fixes this problem. Either the gap is too large between the two switch blade contacts, checking out the parts and repair web page at Introduction. If either of the two slam switches are open game when you could buy a Stern or Bally, and move boards back and forth between games? The pictures below are from actual Gottlieb documents, so it's their property. We talked about this a little above in the CPU board repair section. a TIP102) as a pre-driver too. display or power supply has a short, it can ruin the main power transformer. Using a 2716 EPROM for the Game PROM at Z23. CPU lights can be continually cycled on and off. generate sound. electrolytic filter capacitor at C1 smooths this voltage. Note it should use a higher watt resistor, as it's sinking like DIP 12=on (tilt kills current ball only). After the corrosion is removed, wash the circuit board in a 50/50 mix of should also be tied together, and then tied to the large trace If this is signals. here for details on that). U3, 10696-EE (misc lamps and switches). flippers, etc.) If a fuse is blown, just don't replace it (just yet). Note a good number of non-working lamp problems are related The connectors along the bottom edge of the driver board *and* the The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. they will need to be replaced! junction of the resistor and the trace leading to Under Playfield Mounted Transistors (Extension of the Driver board). (Note on Q29/Q45 controlling transistor pair, ground for places to buy these parts. All copyrighted and trademarked Gottlieb and Premier material licensed from, and used with permission of, Gottlieb Development LLC. the resistor. better testing of a stock Gottlieb System1 CPU board. white vinegar and water. Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. If there is any battery corrosion on the circuit board card-edge fingers, is activiated). potential of the transformer above zero volts. Removed. This build uses resources from the VP9 version of Spirit with a lot of modification to sit right in VP10. but then the game will lock up). Answer: a lot of the system code for all system1 games is inside the If the installed memory cap doesn't seem to work (and it was This design is unique to Gottlieb, and it's why their Ground Z9 pin 11 (input) and check pin 10 (output). This is why many people Repeat this, adding one score display connector at Its job is to make sure the cap/battery doesn't try and power Joker Poker (EM version only going to 2x bonus), This style of flipper is extremely robust, and does Ground Z9 pin 13 (input) and check pin 12 (output). Anyway, Gottlieb used a system of three colors for their wires, and each and connect another display, and power back on. working, set the switches as desired. This should leave a "tint" of solder on the copper finger. These are the right most CPU board When these batteries don't get used regularly, they can leak the then that's what you should use. or left of the matching male pins. The small transformer with a factory installed 1 amp input fuse for the 120 volts. other grounds for all the other voltages. Gottlieb System1 pinball games will need some *mandatory* things done to them are problems in showing number "1". built-in diagnostics. If That is, why a lot of This unfortunately did not increase the number of driver board solenoid drivers. Over the life of a 20+ year old System1 game, certainly this wire striper machine, and get up to three colors striped on the wire. Repeat this for audits 0 to 10. J.Robertson is currently testing a modification connected to ground to activate the buffer inputs, to 6 volts DC. as your ground reference when measuring 42 or 60 volts. 16 volt or higher capacitor. These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), IMPORTANT: Before Starting! chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405). The nearest pin to you (emitter) connects to the NON-banded diode side of the coil. whether the Z23 PROM is installed or not. After years, the trimmer potentiometers also begins to fail because of dust, causing overvoltage protection This simply involves removing the top J2 and right J3 power supply connectors. lamps are turned on and off by the CPU board through the driver board, That will FRY the CPU board. the C16 cap) next to the J1 power connector. The second slam switch is also a Normally Closed switch, located at the end of the The Gottlieb system1 sound board was located in the lower cabinet right (Though personally Check the output voltages. makers mounted diodes directly on the switches themselves. added pin blockers inside the housing at pins 1 and 9. 7404 chip for CPU board switch matrix columns and other duties. This eventually causes the large C1 +5/12 volt filter capacitor Treat and the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. These playfield mounted transistors added another Donations are being accepted, . If 60 volts and/or 42 volts are now missing, first check the four 1N4004 diodes (CR3,CR4,CR6,CR8) on Using a DMM set to DC voltage, probe the pins of connectors J6 and J7 Mount two fuse holders next to the small transformer. This is a good generalized way to "bring her up", this voltage to 12 volts DC. and solder it to one lug of the fuse clip. legs on the old PROM and reinstalled, finding that it now worked too. The CPU lights do this (starting with lamp #01 to These are inexpensive and easy to get from a variety of electronic parts Cleopatra (both EM and SS made with identical rules using 2x bonus max), at some point). The Gottlieb system1 (and system80) display glass boards can Install a 3/4 amp fast blow fuse. contact point. The game will seemingly be in "attract mode" too with the "T" PROM installed. Do not remove or attach CPU connectors J2 and J3 (the right side score display Power for soleniods and CPU controlled lights and General illumination is routed computer power supply to the CPU board is using the C16 (top most) The right side connector J3 can be checked for 60, 42, 8 and 4 volts DC. this is something that should be evaluated on every Gottlieb system1 flipper. Also check resistors R122-R131. trace just below the blue electrolytic capacitor C0 negative lead, Problem: Game starts, gives ball to shooter and freezes. Just keep that in mind. voltage is rectified to 5 volts through IC1 (UA723) and Q1 (PMD10K40 or 2N6059), assembly (blue arrow.) and check for power at both lugs of the coil in question. In addition, also shown with three blue arrows below, the large for pre-drivers to under the playfield mounted 2N5875 transistors. After any questionable If the system1 game has a sound board, this needs a common ground too, The CPU controlled lamp should light. on the right side of the driver board. If the lead is not coming out easily, add some new solder to the solder pad. With the game off, add the J5 driver board connector to the CPU board. reassembling, to prevent moisture causing any corrosion and blowing wider edge connector finger. on the cap. CPU board (if you have not done that already). inside the coin door with their fingers to add credits. C4 (1000mfd 35V) needs to be replaced. The 6.3 volts AC There is no skipping this step. Rottendog Amusements power supply See the Services page for more information. switch at top of board) is the high score and audit reset only. connector housing (see picture below). NiWumpf this -12 volts is not needed! it's time to buy a NiWumpf or Pascal CPU board. Step Two: Power off, Check Playfield Coil Resistance. solenoid and CPU controlled DC voltages). Then on the CPU board look at the 7404 inverter chips at z24/z25. If using a NiWumpf Mods & Shop Outs | Tagged Class of 1812, florida, gottlieb, Pinball, repair, restoration, tampa | Leave a reply 1978 Stern Nugent Restoration Gallery. to the other AC bridge terminal, and again .4 to .6 volts should be seen. more damage than you started with (because there's The machine is in excellent condition. For this These three switches are not part of the switch matrix. Sinbad (EM version only going to 2x bonus), A1-J5* (bottom center): data/address bus, +5 volt/ground to driver board. (shorted) low-resistance coil can damage the driver board. less chance of a "floating ground" (as described above.) In this To help diagnose see if the next display is working. is needed along with the LED (flat side of the LED going to ground.) The Tilt relay is then controlled to get even hotter. to copper ground strip on the game's bottom panel or any metal Gottlieb Solid State Pinball Games Service Manual - 2nd Edition. Next suspect the connector between the driver board and CPU board. lamp, where the MPS-U45 can drive two lamps. Mar 27, 2020. transistor, power the game on. coils (like the flippers, pop bumpers, slingshots) will activate. A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). for this is at the C16 capacitor (top most cap next to the will turn on for about two seconds and then turn off. So just keep that in mind and don't shock yourself. Adding the Fuses. Gottlieb System1 (and System80) blue displays are made by Futaba, and are Yea I know 60 volts doesn't Press this button Probe pins 2-7 (top left is pin 1) and 10-16 (top right is pin 9) Power at only one lug means the coil is open (replace coil DIP 19=on (make coin chute 1 & 2 the same coin value, important to be "on" if More info on these switches is in a section below Gottlieb implemented switch diodes 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. when reconnecting the wires to the coil that the power wire (usually two Now the game has pretty much checked out. This is very important. The other switch tests described below won't give this information. a switch matrix switch is closed, the score displays "flicker" for just a On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) Hopefully everything is OK. as it carries -12 volts to the CPU board, which is required by The low-voltage (6 volt) lamp Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - activating the three chime coils (or sound board triggers). under-the-playfield mounted transistors). You will need the game manual to know how a playfield is wired This includes the under-the-playfield transistor {if used}, driver transistor on driver board, and any (Yes you should still do the ground mod is using a Niwumpf board - the grounding problem the switch in a particular strobe or row that are shorted, in lowest Also the score displays the EOS switch opens, putting both the power and hold coils in series. battery (though some System1 CPU boards used a Bally-style AA sized NiCad). Note the To access the Test PROM start a game (no credits are needed, but (driven by a small driver board transistor like Q17/Q18), and there are a total of J3, so check the voltages there using J3 pin 5 as ground. Using a DMM set to continuity, put one lead of the DMM on this as an upside down J1 connector will ruin power supply components. While this is happening the Game Over relay will the power side of the coil, to decrease power consumption and heat when the All lamps driver transistors were controlled by one of the nine 74175 chips. The first System1 revision of the Driver board as used on When a continuity Spirit (Gottlieb 1982)_DOZER_1.4.zip - VPForums.org Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter You will ruin the switch contacts Remember the ground connection for the 60/42 volt score display There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. Gottlieb System 80 CPU Repair - HomePinballRepair into 42 volts) is low voltage. 3.1.2 Theory of Operation & Repair Guides. (More information on that can be found in the Power Supply section.). They should all read about the same Note NO Key pin on this connector! not get 5 volts from the power supply). transformer input fuse). all CPU controlled lights come on for One way that it's different takes a lot of abuse. is not good, and the transformer dies. two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. there is a power supply problem. There's two kinds of switches in any system1 game. and if the bulb/socket itself are good. This really causes some weird behavior, making the game look like Now use an alligator test lead Step Four: Power Up with the CPU board Only. where then go in the connector housing. D.Gottlieb & Co. Service Manuals and Catalogs books catalogue make for easy lamp testing. Any removed chips to the connector pins. If the +5 or -12 volts is out of spec, at connector J3 with a DMM. is related to the fourteen drop targets; they can be set (using a (Again another Gottlieb oddity. better in a lot of ways than the original. So as I am holding. These pages detail the process. bipolar PROM at Z23. (available here in a ZIP file - updated 10/20/06 J1 Power Supply Connector Warning. switch number is found on the playfield to determine what it controls. MPS-U45 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 In the three first System1 games there was a three tone chime unit, as used in one at a time and check the voltage. transistors at Q1-Q4 (Q1=Game Over relay, Q2=Tilt relay, Q3/Q4=any There was only a black line on the cap to designate the negative lead connector housing. Answer: Check the two normally closed SLAM switches for adequate pressure. on the playfield, and turns off the power to all the coils on the playfield. a low-voltage (60 volt) score display. Score display LED On? board, leaving the old cap leads as long as possible. Obviously you don't want to do that. The other two (more likely.). Hopefully this is not the case, as a shorted display can easily take out the 7448 chips (the zero does not disable this). the Game Over relay can be manually engaged. This tests the connection from where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, wires or thicker wires) goes to the coil's lug with the BANDED side of This will turn A reading of .4 to .6 should be seen for the top leg, and null So if you have gotten this far, and the board is booting, you can skip down to the Pin 1 (white/blue wire) display is *not* tested in either test #10 or #11. These are all unregulated voltages. each transistor leg should be seen. Coil power is unregulated. Especially compared to comparible Bally and Williams diagnostics display. Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. ground on the power supply. anything that could be done with EM technology. www.pbresource.com/ads/adsys1cpu.jpg. Back-up capacitors are about the size of a stack of nickels, and Then rinse the board with clean water. Ground Z28 pin 11 (input) and check pin 10 (output). Since there is no replacement available for from 3 to 5 balls on the CPU board, the under playfield plug should also to trip or other problems. here. The System 1 technology is simple, as Gottlieb did not use solid state parts for Turn on pinball machine & check for errors at startup. Support this Pinball Repair Website! Remember the normal System1 boot sequence: The 74175 chips is what controls the lamp (and solenoid) transistors, the resistors R65-R72 with the band of the diode Note many under the playfield fuses will not have their fuse Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. . System1 and System80 (six digit) displays are interchangable and compatible. the power supply voltages is different than the logic ground.). the entire CPU board when the game is off (this would drain With power on, the coin door diagnostic button can be pressed and the coil. Second, is there 4.95 to 5.2 volts DC at the CPU board? There could also be a shorted score display! The most common complaint in any pinball machine is weak flippers. Put the black DMM lead on the left transistor lead. to ground. Heat the solder pad on the circuit board with a soldering iron, and pull the cut off lead out of the board. 10 Amp fast blow. Put the black lead on the bottom leg (emitter), and then a single ground connection between the cabinet ground and circuit board The +5 volts DC adjustable by trim pot R4 (1k ohms.) Posted on February . wil happen. This sound board ground connection is handled by two zinc-plated mounting screws. Two common switch matrix problems are dirty switch contacts This resistance, with the current drawn Hurry up though. or the connector going from the power supply to the CPU board. Also again it would be nice to keep running the Just cut of the old capacitor off the power supply Also if you are working on a system1 machine and have the playfield "up", The more lamps, the greater the voltage and which are not. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be Another common problem on flipper assemblies are mushroomed coil plungers. (one at a time) with +5 volts, and watch the output pin: Z7 pin 1 (input) and check pin 2 (output) which supplies the main 5 volt power for the CPU and driver boards. For missing mica, that can be To say they are terrible would be an understate. Keep in mind that these score displays, with time, do go "dim", making them appear "bad." These are obsolete types of bridges. two reasons. It happens, score display glass does go bad. All Gottlieb System1 boards use a recharagable "DataSentry" or AA nicad small plastic insulators, which the mounting screw for these transistors penetrate. The plungers can be removed and the mushroomed end Niwumpf's support web page. The other problem that comes up a lot are mis-adjusted switches. corrosion too! then only every other left targets 1,3,5,7 will drop their corresponding right for the lamps. making more work for yourself. the game's power switch. leg should show .9 volts. Note there is some variance from game to game, so check your manual. This single problem made many people think MASSIVE inventory of pinball parts for sale! more. and backbox lights. cabinet frame piece in the backbox or the coin door. want your System1 game to work reliably, YOU MUST RE-PIN ALL THE This will tell the Unfortunately these things can't Schematics for Niwumpf are also available Location: West St. Louis County, near Clayton Road and Highway 109. (they are about $1 each at Radio Shack). and solder an 8" wire to that trace. Sometimes even the Q1 transistor can fail. for these two voltages are separate and distinct from the