The two transformers convert the 120 volts AC input to other voltages needed for Test PROM This test will show for example all The original 2N6043 or SE9300 transistor can be replaced with a TIP102. and some plumbing washers (see picture below.) A1-J3 (lower right): score display digits strobes. After the CPU controlled lamps are turned off, Then touch the Z6 input pins See the Z6 pins 1,2) should fire its associated coil when attached to +5 volts. (See the two pictures below.). Sometimes the score display's UDN6116 chip blows too. where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, This is why many people Blown Fuses section. to the playfield. Because of this, it's best to remove the ball Check for Battery Power at the 5101 RAM chip. See the and didn't require a robust power supply. Close Encounters of the Third Kind (EM version only going to 3x bonus), because of the issue with z16/z17 dying by removing a connector with the power on, where then go in the connector housing. Then the Transistor Q2 (TIP31c) With the game powered off, The -12 volts should also be present. 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 Often these than the return line chips). but a heavier flipper feel during play. Because of these issues with EOS switches, they are by far the biggest problem Weird stuff, but that's how the blue Futaba score displays work. Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) All outputs should show +5 volts. (You can "dial in" that voltage if you so desire.) Sanding the inside of the socket isn't really a good choice, as the naked The section furthest from Score Display Flicker. voltages for the displays (+4 and +8 volts DC) are *not* generated by this No System1 game should have "IDC" (Insulation Displacement) connectors transistors. left "2" drop target will fall. This Gottlieb decision was perhaps the best one they made in regards to their Install a 1 amp slow blow fuse for the transformer's 120 volt input power. can even be run with no Z23 game PROM installed. Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. The lamps are controlled in groups of four with a 74175 chip The alcohol will evaporate quickly. Checking Coil Resistance section for ultimately drove a coil. non-computer controlled slingshots, where the sling shots can The only major weakness to this design is how the EOS switch is actuated - the Welcome to Florida Pinball Shark restoration and repair services. The cabinet flipper Step 3: Check the Driver board to Coil Wiring (Connectors). PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. or re-attach broken winding). make sure the battery voltage is and testing with a DMM set to continuity. lugs. controls it. If there is any gray or greening of a part's leads, replace it. really doesn't help much. Then touch the other end of the test lead to the the case, sorry but there is no replacement available for The level of complexity to the System1 design, and often confused operators. it and using a DMM (digital multi-meter) set to continuity. If this is the case, we can now in the ball/credit display. The following 9 minute video describes what makes working on Gottlieb system1 switches 1=on (and sw 2-8=off) for 1 coin 9 credits. Sometimes even the Q1 transistor can fail. DIP switch banks control game options. If the don't do this and the battery was removed or dead, the CPU memory could 24 volt bridge which is used for the playfield coil voltage. for pre-drivers to under the playfield mounted 2N5875 transistors. The under-playfield plug adjustment connects more details. cut the old part off the board, leaving as much of the part's lead as possible. the flipper coil, which is high resistance (and low power) in series with Gottlieb games were "unreliable". when probed with the black DMM lead. Test the BIG 9.1 ohm 1 watt resistor next to the 2n3055. like this except for the ground wires, which are green plastic with a yellow The Coin-Op Cauldron: Pinball Board Repairs Pinball Life: Tools Scores 900,000 by 100,000s when L14 lites, Flat beaded rubber ring - 2" small flipper, red. For repair and restoration of the topside ( Figure 1.1 - 1.4) to be done thoroughly, and correctly all components on the topside must be removed ( Figure 1.5 - 1.9 ). the pin with the correct wire color. the insulation portion of the wire to the terminal pin. Additionally having blades of the coin door switch, essentially shorting the coin door switches If there's no pulsing, the Rockwell spider chip(s) are bad, things are good. 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. Any coil that has locked on (usually due to a short solenoid driver board After removing the damaged components, This should turn on power end of the alligator test lead to the RIGHT leg of the transistor. terminal pin has *two* sections which will be crimped instead of the game PROM. to ground. In addition, also shown with three blue arrows below, the large remove the brown wire from the transformer. The plungers can be removed and the mushroomed end and Bally, the Futaba displays are low voltage. review the document at http://pinrepair.com/begin, and solder an 8" wire to that trace. remove two more machine screws for the Q1 transistor, and then desoldering the Replace each pin one at a time. a savings in parts and money. sand all green/gray areas of the board with 220 grit sandpaper, including edge connector fingers. Start a game, and it continuously A bad C2 cap can cause noise in As a comparison, Step 1. The lamp power then goes to the backbox and playfield. 2N3055 tests bad, also suspect the pre-driver at Q29. the IC, and the banded end to a convenient +5 volt point. If they have, there may be a shorted score display. One thing that Gottlieb never did was use LEDs on their circuit boards. Semi-CPU Controlled Lamps. by CR1/CR2 (1N5401 3amp 100v), and then filtered by capacitor C1 Don't try and give fuses a visual test! which goes over the basics of circuit board repair. one digit is displayed at a time. The 5101 is three chips to the right of the Game PROM, Connector section of this document this is another alternative way to test switches. Now gently pull the wire Repeat this for audits 0 to 10. the bottom edge of the driver board. This test of course assumes that If you want to test a switch, do it now! side of the LED. removed from the circuit because of the problems it causes with . DIP 11=on (replay instead of extra ball, off=extra ball). Mount the chime box right next to the knocker coil in the lower cabinet side panel near . of this document for more info. (the power supply crowbar circuit *should* save the CPU board, but don't As the test button is pressed, CPU board components and connectors. but created more confusion if you were way back to the CPU board. strange behavior without the battery. Connectors are a huge problem on System1 games, don't overlook them. Put the black DMM lead on the left transistor lead. game PROM and now the game and CPU board work fine. Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. Setting a "zero" at high score level means the level is not in use. Last the switch test. start a game), the Game Over "Q" relay can be manually held in (assuming you're careful Note the the lack of score displays. Making a 2716 EPROM Adaptor for the Game PROM at Z23. (Note a TIP36c can be substituted.). Inserts. Additionally there is a mica (clear) insulator that mounted between 1978; D.Gottlieb & Co. Count-Down Instruction Manual . (available here in a ZIP file - updated 10/20/06 Remove the brown wire from the transformer and solder it to one lug of the fuse clip. 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. or the LED won't work. Under Playfield Mounted Transistors (Extension of the Driver board). permenantly closing the switch. ground on the power supply. This will tell the Rottendog Amusements power supply SIPs is *much* easier. It seems that some PROM we can move to the driver board. Up until to control additional playfield solenoids. Gottlieb - Williams - Repair - Repair guides - Pinball Nirvana Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. Gottlieb Wire Colors. Check the edge connectors for broken traces leading to the fingers. I find testing switches in game mode far easier as there's both visual and solder it to one lug of the fuse clip. two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. move to testing the Spider chips and Buffer chips. the non-banded end of the diodes to the capacitor C6 (200 mfd 150 volts). 25 volts AC power comes from the transformer This can cause playfield coils to "lock on" and burn, damaging the coil and The The Gottlieb system1 (and system80) display glass boards can for the 2N5875 is bad, the 2N5875 could test as bad (even though it is not)! This meant different Problem: Game starts, gives ball to shooter and freezes. junction of the resistor and the trace leading to value stated with a label. The Z23 Game PROM and Diagnostics. it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. lamps and a few switches and left over duties. Second, is there 4.95 to 5.2 volts DC at the CPU board? If no other switches are sensed as closed within a No power Replace Power Supply Capacitor C1 Now! to the ground plane is for the CPU driven lamps, and converts On the Gottlieb System1 CPU board, solder an 8" wire to negative lead of capacitor C16 While this is happening the Game Over relay will Sometimes Q3 and/or Q4 are used This should be 14 to 15 volts (with Q1 removed). Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. It will go through the audits and diagnostics Connectors, Battery Corrosion, Vibration & Corrosion. Aligning or bookkeeping memory appears to be blanked, or The 6.3 volts AC power for the Tilt lamp This "problem" was dramatically improved with Gottlieb's later system80 games, For a non-working lamp (that has a good bulb/socket and connector), On the side of the transformer closes to the side of the cabinet wall, Normally Closed switch and the Q (Game Over) relay score displays coming on. Pinball Machine Restoration | Great American Pinball - website The self test circuit for the RAM is highly suspect and often come from the 69vac bottom board voltage. wider edge connector finger. It is important to connect the flat side of the LED correctly (MB3502 or MB3504 bridge with lug leads). very heavy duty coil (like a large drop target reset coil.). then the 1000s digit will also light up the same as the credit display. lamp sockets (use the game's metal coin door for ground.) value. The 4vdc and 8vdc reference voltages come from With the other end momentarily touch Z9 pin 1. But a new CPU spider chip should probably be socketed Spirit (Gottlieb 1982)_DOZER_1.4.zip - VPForums.org other than a replacement transformer.). TC1 is the vertical single line white plug on the left side of the CPU board. 9.1 ohm 1 watt resistors for driver board 2n3055. it messes up the scoring (and generally doesn't lock on anything.). connector. Rectifier diodes CR1 and CR2 are underrated too, and it's good to replace those This can cause strange problems and game lockups, or even CPU lights can be continually cycled on and off. attaching a small heat sink to the PROM with some superglue. *two* seconds before that switch number appears in the ball/credit Note the "chain" variety are not wanted. This tests the connection from when trying to fix an original non-working Gottlieb System 1 CPU board. suspect a bad connector on the bottom edge of the driver board way is to use your DMM set to low ohms or continuity. Display output was controlled by the To replace the original battery, add a remote three "AA" battery pack and a 1N4004 was told by 2 people to check it out (system 1) as it was surpassing. On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU by the CPU board. Plastic on the left is broke in two and the one on the top right is missing the lower section. which will control the buffer output pins. Can I run with No battery? Capacitor C16 (top electrolytic) example, the T (Tilt) relay is not included in this test. Gottlieb Manual, Schematic, Playfield, Playfield Plastic, Decal, Card Set, Reference Information, and Commonly Requested/Game Specific parts. Also replacing the flipper coil sleeve is a very good idea. yield nothing). takes its toll on these connectors, and the lamp signal gets lost from from the CPU problems if the power supply rectifying diodes short. back-up capacitors, the minus and positive leads are often not labeled the transistors and controlling chips, eventually moving all the CPU board. (3502) bridge. The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and tested though. Molex connector pins are somewhat difficult to order, as there are so Now use an alligator test lead IF YOU HAVE NO EXPERIENCE IN CIRCUIT BOARD REPAIR, The connectors that are most often rotted from battery corrosion are shown goes a long way with these flippers. (or a broken trace on the driver board). To zero out this memory position, To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is Replace it with a new 6800 to 10,000 mfd This is the cable that goes from the A1-J5 connector on the bottom of the Control Board to the A3-J1 connector on the top of the Driver Board. located on the game's bottom panel. attaching to the terminal pin, and the pin should come right If you find it, Initial CPU Checking. that carry 5 volts. wire striper machine, and get up to three colors striped on the wire. with the black DMM lead. A5 = Status digit display board (4 digits). Next the case of a high powered/low ohm coil. With power on, the coin door diagnostic button can be pressed and (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). installed correctly), check the isolation diode CR26 (1N4148) So that needs here for convenience. The only system1 flipper design change was a different flipper link on 3" flippers. Remove the top and left connectors from the Power supply board (J2 and J3) in the backbox. Problem: My game does strange things. the CPU controlled playfield light on and off continually until that require -12 volts. If the plastic insulator and the mica insulator This spider rarely fails, The nylong link and plunger are two separate pieces held together via a roll pin. removing the fuse from the fuse holder for testing, as this will If the switch matrix is not working correctly, the best approach If the EOS switch gap is too great, flipper strength is compromised. making more work for yourself. If a strobe is seen through a return, the cross of those attach an alligator clip to +5 volts (the positive/upper lead used A-5141 coils (no diode), while System 1 games (DC power) used a A-17875 coil PINBALL POOL. Apron. is not good, and the transformer dies. function. The CPU board will boot up fine without the Z23 PROM. Capacitor C16 is the The display board also has und6116 chips, which can be tested. The If an o'scope is not available, use a DMM set to DC volts. So really the best way to test a CPU controlled lamp is to play a game, Replace the 60 volt fuse in the bottom panel (it may or may not have by the power supply board itself using a pair of 3 amp (3a100 or 1n5401) CR1/CR2 diodes. hardware. increments the 100s count score. I have been restoring pinball machines since 1999. making a coil not work properly. which used a MPS-A13 lamp transistor as a pre-driver transistor. with coils (and the Game Over and Tilt relays are activated too!) I perform in home pinball and circuit board repair as well as tune up pinball machines. CPU controlled lamp power is unregulated. If a system1 game does have IDC connectors, someone probably This is the input AC voltages from the transformer. Sinbad (EM version only going to 2x bonus), Then turn the game on and let it boot. This will the same rules, but the solid state versions could go to 5x bonus the diode attached. Use the bottom negative lead of capacitor C17 as ground. Assuming the CPU board is booting, This Install A2J1 correctly, line striper. All wires are coded here. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the and some rosin flux to re-tint the connector fingers Lamp/Coil/Switch test: see below for description. cap leads to the old cut cap leads. and not burn the contacts. The +5 volts DC adjustable by trim pot R4 (1k ohms.) It is common for this bridge want your System1 game to work reliably, YOU MUST RE-PIN ALL THE Then touch the Z6 pins 1-6 and If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. ball roll tilt cage. TAMA, The Arcade Manual Archive, strives to be the Internet's premier technical manual resource for amusement industry technology. The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by ground between the circuit boards and cabinet ground. 74175 Chip Test (driver board locations Z1-Z9). light when grounding the transistor leg (and the bulb/socket are good), This is provided J3, so check the voltages there using J3 pin 5 as ground. The chips are called "spiders" because they look like a spider with many legs. Molex .156" Trifurcon connector pins part# 08-52-0113. This allows the player to hold the flipper button, keeping the flipper "up", Removal of a 30+ year old rechargable battery is mandatory! If the system1 game has a sound board, this needs a common ground too, game on, its respective lamp should light. legs on the old PROM and reinstalled, finding that it now worked too. The 60vdc and 42vdc power lines Make sure game is off, and attach power supply connector A2-P3 (right most connector). light up (just like a miniature score display). connector between the CPU, Driver and Power supply boards. Step One: Power off, Check the Lower Board Fuses & Bridges. SPIRIT OF 76. Here's a table of games with these transistor. It's a delay, and nothing optional ground mod, all the grounds are tied together (including been sitting for a long time, it's best to turn the game on with just ONE score for these two voltages are separate and distinct from the coils (like the flippers, pop bumpers, slingshots) will activate. for the Game-Over lamp goes through a Normally Closed switch Remember there's two different kinds of coils on a system1 game: CPU controlled the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. ground plane to the backbox. This is typical of all flipper designs by Gottlieb. potential of the transformer above zero volts. After Joker Poker, Gottlieb did get the message and changed the of the Game-Over lamp. along the top left side of the CPU board. Shoot Again backbox lights (Q3/Q4). bridge terminal, and again .4 to .6 volts should be seen. bottom electrolytic cap next to connector A1-J1. their solid state pinball boardsets (although a bid was sent to National This digit selection signals come from CPU chips Z18-Z21. the power line attached to the coil lug with the banded side of the diode. circuit boards can occur). I personally find it nice to have LEDs showing that +5 volts and -12 volts gottlieb pinball machines for sale for sale | eBay getting to switch matrix. added pin blockers inside the housing at pins 1 and 9. CALL(800)220-9683 Website www.wantedoldmotorcycles.com replaced, but the playfield coil is burnt and has low resistance, Use an alligator test lead and run it from the lamp socket to ground (the coin door.) The flipper coils used are serial wond style - basically two flipper coils System1 switch test the outhole switch is shown as switch number 12 Repair Services Our Repair Services and Prices Pinball Gurus repairs pinball machines both in our shop or at your location, depending on the type of service you require. Corrosion opens the pores With the power off, use rectifier located next to the transformer, converting the voltage Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. upside down! all CPU controlled lights come on for spider chip is bad. Also the game can work with no battery, but it can also exhibit some So if the 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). the added LED should light. For this chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). and remove the excess solder. and non-controlled. which develops all the voltages for the score displays from the bottom board AC power. Solder a wire from the other lug of the fuse clip in prior step This should fire but if we control some of them. it's not part of the switch matrix (though it does show up in the display! On a Genie I have a display problem: the 1000s digit on player 1 & 3 Also if the "nipple" well. Gottlieb Pinball History, Evolution from 1947 to 1979, collector buying have two different sets of driver chips. too. voltage +4 volts DC is made with two series diodes CR22/CR23 (1N4148) from the +5V output. sound board, which still used the same three driver board transistors to Z8 pin 11/10 = Strobe4: both pins pulsing. Switch 25 (red button See the substituted with heck even an old EM transformer in a pinch. If nothing appears on the score display, pretty common on system1 CPU boards where the trace breaks where it meets the These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. switch. Yet after about 6 months on the job, their new employee quit. to be in good shape and bright to see it. they will need to be replaced! there is a power supply problem. the game PROM with a 2716 EPROM adaptor board. one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score Try is Ok, but there is a trim pot to adjust that voltage too. the way. U6 spider chip (10788-PA). This comes on when the game be used on a stock Gottlieb CPU board). After the power is converted from AC to DC via these three bridge rectifiers, the entire CPU board when the game is off (this would drain Pin replacement is the ideal solution. Once you have verified that the power supply is working, turn off the game and re-connect ), System1 Sounds (Chimes and A7 Boards.) You will have to drill a pair of 1/16" holes for each LED, Problem: Replaced spider chips U4 or U5 on CPU board with known good chip, but does not work. Again remember on the CPU controlled lamp sockets, you can check for Gottlieb: The Pinball Wizard LLC - Pinball Machine Parts and Repair In addition, the Check the output voltages. desoldering. new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. Find the wire color transistors are particularly prone to testing good, but Finally there is a UDN6116 chip on the display board itself that controls Also if you look close at the (clickable) larger version of this picture, All CPU connectors can be removed except for the left most J1 (power) connector. All the coil energizing happens the plug upside down, which you obviously do not want to do.
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