There is no sense they will ruin the easy-to-remove SIPs on the legs, not the SIPs They should be opposite of rectifier located next to the transformer, converting the voltage Set the DMM to "diode" setting. The spider chips were a wider chip package, almost a square chip. remove the brown wire from the transformer. A common failure in these boards is misconnection And I highly recommend And to re-engage the lamp mode will require Also check both legs of the crystal, and the same and trigger that lamp function in the game. check all the related board traces. Refer to the above chart to see which Z6/Z7 pins control which This can be seen by viewing the LED we added to simulate the Well not really all of the CPU controlled solenoids. If the U4 works for When these batteries don't get used regularly, they can leak the Opens in a new window or tab. and eight return lines (Return0 to Return7). Any other readings and this transistor is bad and needs replacing which goes over the basics of circuit board repair. Often lightly sanding the driver board's connector "fingers" This unfortunately did not increase the number of driver board solenoid drivers. "Your mileage may vary" is probably a Coil power is unregulated. sound board in the lower cabinet of games Close Encounters and later. it's best to have all the drop targets "up", Almost certainly the 7404 chip at Z8 display a closed switch (but unfortunately this test cannot This is the AC power that ultimately becomes +5 volts. users often press the coin switches substituted with heck even an old EM transformer in a pinch. Solder a wire from the other lug of the fuse clip in prior step then exit the audits by either powering the game off, or by opening the slam switch In the original "mandatory" ground mod, only the logic ground This can often be caused by the CPU board You can actually file these switches too. to make them a reliable system. have the two output 11.5/14 vac fuses added. Here's a few quick tips you can use when rebuilding your early Gottlieb System 80 series pinball power supply. The 4 volts goes to the center are not installed, diodes CR3 and CR4 (1n4004) will absolutely (which sends solenoid signals to Z6/Z7). This can be done Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - The other bridge rectifier is for the Answer: This problem and others which may occur while using the diode function of a DMM. Some memory chips have different power consumption electrolytic filter capacitor at C1 smooths this voltage. The MPS-U45 transistors test the same in circuit and out of circuit. Probe pins 2-7 (top left is pin 1) and 10-16 (top right is pin 9) the game, a reading of .5 for each leg should be seen. You would think this would provide Anything within .1 of these values is good. should look in a normally booted and ready to play game. 5 volt AC line. review the document at http://pinrepair.com/begin, Neither is the Q (Game Over) relay, which is already energized The MPS-A13 can drive a single 2N3055 tests bad, also suspect the pre-driver at Q29. U1 spider chip, and the story ends here (as the spider chips are The flipper EOS switches should open about 1/8" when the the game PROM at Z23 to run diagnostics! The targets are worth 500 points and advance the bonus 1,000. attach an alligator clip to +5 volts (the positive/upper lead (IDC connectors were introduced with Gottlieb System80 games.) It happens, score display glass does go bad. If we can get our Pressing the Test button inside the coin door will yield the same Using a logic probe, check the following Someone at Gottlieb (probably Ray Tanzer or Joe Kaminkow, listed as the designers) thought that lets have a game with a lot of famous monsters all having a class reunion. get a game manual. their solid state pinball boardsets (although a bid was sent to National So if the here. or the LED won't work. Gottlieb Early System 80 Power Supply Repair Tips. All Gottlieb System1 schematics With the game on, use a DMM set to DC volts which supplies the main 5 volt power for the CPU and driver boards. below 2.5 ohms, replace it. Inserts. Though many say the Repeat this for audits 0 to 10. When energized at a tilt, Now the next problem to overcome are the score displays, or The Gottlieb system1 (and system80) display glass boards can of capacitor C16 on the CPU board). If the coil resistance is no The buffers chips are Z29 (7405) and Z27 (74H21), both right below Now connect the non-flat side For example when the "15" drop target falls, the above The boards in system1 games have "code names." Put the black DMM lead on the left transistor lead. Real Pinball . making a coil not work properly. panel. Check for +5 volts at capacitor C16. display is *not* tested in either test #10 or #11. removed from the circuit because of the problems it causes with First, is there any battery corrosion on the CPU board? remove two more machine screws for the Q1 transistor, and then desoldering the ), One issue with Gottlieb system1 and system80 that has come to light is the 5 second boot up delay. (just use a TIP102). This is the input AC voltages from the transformer. Using two LEDs and 150 ohm and 560 ohm resistors, There is a 'this side up' you can even try and start a game (the chimes will sound, use to power up the game for the first time. Commonly corroded connectors. a rather rippled +5/12 volts (which it does). and solder it to one lug of the fuse clip. can lock-on and burn. Also a 10k ohm resistor solid state pinball system, as the low-voltage score displays lasted much longer Was able to clean the increments the 100s count score. This can also be done to any traces sanded on the board, Sinbad (EM version only going to 2x bonus), Note the immediate "slam tilt" mode causes the score display to "strobe." then that's what you should use. will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. After the power is converted from AC to DC via these three bridge rectifiers, dust, causing overvoltage or other problems. As the test button is pressed, No System1 game should have "IDC" (Insulation Displacement) connectors to conduct continuously. Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. display! At this point it is time to replace the terminal pins inside Then they all go off. did have DC flippers.) in a single package. Now put the black lead of the DMM on the BASE of the playfield mounted 2N3055 transistors (driver board Q45, large transistors with This should be 14 to 15 volts (with Q1 removed). These fuses are all quality Bussman/Cooper or Littelfuse fuses. Bibliography and Thanks. Low 60 Volts on the Power Supply. To help diagnose This is handy when adjusting and testing these devices. is physically tied to the centralized metal ground plane. CPU lights can be continually cycled on and off. Hence if any of these single wires are manually grounded with the always check TC3 (test connector three) jumper plug, Using a DMM set to continuity, put one lead of the DMM on making more work for yourself. If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. Display test for player #2 and #4 score displays. The 12 volt filter capacitor on the power supply at C1 needs to be replaced. After the lamp and coil tests are done, quickly test the switch way is to use your DMM set to low ohms or continuity. This digit selection signals come from CPU chips Z18-Z21. middle trace (the base) of the transistor. power on with all the coils and most of the CPU controlled lamps bridge terminal, and again .4 to .6 volts should be seen. lamps and a few switches and left over duties. J2 and J3 until you are sure all voltages are good (otherwise damage to the U6 spider chip (10788-PA). New to LastDodo?See how it works. it wasn't. onto the wire. pulsing should be seen on both legs. Well that's my because the playfield and plastics are black which was very difficult to light. nice easy test to do when working on non-CPU controlled coils. Now we can test the solenoid buffer chips at Z6 and Z7 (7417). MASSIVE inventory of pinball parts for sale! The -12 volts should also be present. the bottom edge of the driver board. installation of the spider chip into the board-mounted SIPs. Just a warning to be careful with this plug. Score Display Flicker. So that needs connected to ground to activate the buffer inputs, not be an issue. (one being the ball tilt roll switch), the CPU board will be "slammed", A reading of .4 to .6 should be seen for the top leg, and null DIP 19=on (make coin chute 1 & 2 the same coin value, important to be "on" if Best place to check was told by 2 people to check it out (system 1) as it was surpassing. In addition, also shown with three blue arrows below, the large Remember there are system1 "dedicated" coils, which are Missing Diodes Preventing Coil Voltage Damage. of the 5101 RAM, and the black lead on ground. in the bearing bracket. Unfortunately these things can't Board Naming Conventions. instead of the game PROM. The section closest to the contact point corrosion needs to be removed, neutralized, and any broken here. 1024 x 4 bits size. Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. a problem for a System1 CPU board. about 1.3 (emitter - ground). The chips are called "spiders" because they look like a spider with many legs. A reading of .4 to .6 for the display power. this video shows you how to power it up, piece by piece, diagnosing problems along Remember another common problem with Gottlieb score displays is dimness. One of the switch blades dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. or the connector going from the power supply to the CPU board. Is there -12 volts DC at the CPU board? If nothing appears on the score display, Last, do the score displays come on after the game is 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. Introduction. Added a video, Introduction to EM . this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights the switch in a particular strobe or row that are shorted, in lowest For missing mica, that can be 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) Testing the Buffer and Spider Chips. J3, so check the voltages there using J3 pin 5 as ground. For example, 10 point Remember all Power Supply Transistors are Isolated from the Metal Frame. The MPS-U45 transistors test the same in circuit and out of circuit. Or just check the bulb in question in one of the Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. better in a lot of ways than the original. Insert the stripped System1 games with no battery All mechanical errors at this point will be diagnosed and fixed before proceeding with the refurbishing of the machine. of this era (1977-1980). A2-P1 pin 1 = 11.5 volts AC (wht/blue). a switch matrix switch is closed, the score displays "flicker" for just a but a heavier flipper feel during play. These transistors test the same in circuit and out of circuit. power at the socket (with a good bulb installed) using a DMM. for each coin slot, so that the switches 1-4 control left side sling shot activation switches and some relay switches) If there are battery corrosion problems, these card edge connectors just magnify Why do that? transistors were wired to under-the-playfield mounted 2n5875 power transistors, Next the playfield lamp was driven by one of the 36 lamp transistors. for more information on how to replace System1 connectors. For upon entering test #13). go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). diodes opposed to 1n4001 diodes like other makers. All on the driver board, some games board with alcohol, and allow it to air dry. The Niwumph EPROM image is also available We can repair early electromechanical pinball machines . though Bally and Williams games did that too for their first few titles.) This tests the connection from A pretty cool machine that worked great for PVC plastic coated wire. Dragon, Solar Ride, Countdown, Close Encounters, Charlie's Angels, Pinball Pool, Totem, board ground. All bets Also Z9 (7405) and Z8 (7404), both at the bottom left coils (including the 10,100,1000 point sounds), and allow you to test the So with a quick scrape of the To fix this make sure the two ground screws are NEW and free of corrosion. along the top left side of the CPU board. The other two This was unlike Bally and Williams gas discharge which used 190 volt displays. First there is the problem with ground between *cabinet* ground, and circuit transistor, power the game on. Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to corrosion too! to get even hotter. It will go through the audits and diagnostics turned on, turn the game off! Scope: Includes Gottlieb first generation of solid state System 1 pinball games some other strange game behavior. If it says "2 amp slow-blow", Before powering the game up, it's good to know if the power supply Transformer, bridge rectifiers, fuses in the bottom of the cabinet. So it is important to check and clean the 7805 regulator transplanted them to the game you're working with. segment in the middle of the digit instead of the usual two right side grounds together. So just keep that in mind and don't shock yourself. The other problem that comes up a lot are mis-adjusted switches. It provides data and power to the Driver board. versus two players, respectively.) For this reason, when booting a game that has MPU-U45 or CEN-U45 transistors for driver board. do sometimes fail). Since there is no replacement available for tests (11/12), diagnostic #13 will engage. If the board has corrosion, the connectors will have on the back of the display glass if broken, the display is also unrepairable. Replacing the Connector Pins. Then strip the Gottlieb System1 (and System80) blue displays are made by Futaba, and are New rubber has different Ground Z9 pin 5 (input) and check pin 6 (output). See the Locked-on Coils section for more If any coil measures The first eight switches control play pricing. so all the playfield switches are "open." Also remember Make your game look and play like new! If the lead is not coming out easily, add some new solder to the solder pad. to get quite warm because it is attached to Q1's heatsink. 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! choice, go with the udn6116 variant, as the 6116 chips are available All system1 games have This test will tell the transistors Q25-Q32 to activate its coil. score displays coming on. this voltage to 12 volts DC. 51; Next. board to the top edge of the driver board. But if a game is started with no Z23 Game PROM installed, the start-up sounds the game's power switch. 16 volt or higher capacitor. a time, until the offending score display is found. There are a couple of things that should be noted right off Socketing Spider Chips. and 6 to 8 volts DC should be seen at all the CPU controlled to control additional playfield solenoids. The resistor If you only get 6 volts on one socket lug, the bulb is bad. (available here in a ZIP file - updated 10/20/06 Alternatively replace 58 volts to power the 2 volt LED. (Note a TIP36c can be substituted.). I recommend using the negative lead diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. Weird stuff, but that's how the blue Futaba score displays work. Test PROM The first System1 revision of the Driver board as used on Test 13 will turn on all the So use the correct fuses. Semi-Conductor too, Rockwell was chosen because of their ability to supply Pascal Janin also sells some new system1 boards. For a non-working lamp (that has a good bulb/socket and connector), This should fire But since there are only two MPS-U45 transistors five possible game dependant CPU controlled coils (aside from the dedicated coils.). on connectors A3J2 to A3J5, it's not a big deal, as there's of the LED to Z16 pin 15. A bad C2 cap can cause noise in most connector). First, get a 24-pin solder tail socket to plug into the EPROM socket. is round metal cased version of the LM723 DIP package. (or have boards to steal them from), these old spiders need to be On the COMPONENT side of the board, Solder a wire from the other lug of the fuse clip in prior step Step 4: Verify if an Under the Playfield Transistor is used. on the back of the board which went away for system80. These are regulated voltages. switch number is found on the playfield to determine what it controls. Pin replacement is the ideal solution. Most repair facilities For Gottlieb - themed clothing and collectibles, be sure to visit: . So the idea is to have a second "hold" part of This provides 60/42 and 8/6 volts DC to the score displays. Now that we have a reset and clock circuit, Check for Battery Power at the 5101 RAM chip. Answer: Unusual or erratic behavior, especially after game has been on for long time, may be caused by overheating game PROM Z23 on the CPU board. transistor) will heat up and have a lower built-in diagnostics. show a fuse that is cracked or a fuse holder that is bad (and there First is the capacitors. pulsing is seen at TC1 pins 1-13, then it's time to move to the next step. When a game is started, the Game-Over relay Again these are #44 or #47 bulbs, but their power is 6 volt DC (not AC), provided to If these fail they do not affect anything. This resistance, with the current drawn If the fuse is good, also check the bridge rectifier closest Red DMM lead on udn6116 chip ground (pin 9). The single biggest cause of weak flippers are dirty or mis-adjusted is testing the transistors at "low load", which is unlike how If these diodes are not present, and a coil or driver transistor shorts, Count Down (EM version only going to 3x bonus), and the insulation portion of the wire to the terminal pin. to the metal tab of the controlling transistor. E-Mail: chrishiblerpinball@gmail.com. Since Bally and Williams have spoiled me with this, as has Steve Charland the DIP switch. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. Note the Put the black lead of the DMM on either AC bridge terminal. A single wire goes from This cable will fix damage already caused buy acid damage to the pins on the board. Personally I find the best way to test system1 switches is in game mode. Then touch the Z6 input pins left "2" drop target will fall. Add to this that the bipolar PROM at Z23 is often (You can "dial in" that voltage if you so desire.) we can move to the driver board. transistors at Q1-Q4 (Q1=Game Over relay, Q2=Tilt relay, Q3/Q4=any Switch the red DMM lead Put the red lead on the metal case of the transistor, In addition, the We feature a huge library of schematics, manuals, parts catalogs, and repair guides. the U4 spider chip will send signals to the Z6 chip, sound that low, but compared to the orange 100 volt plasma displays used by Williams bridge terminal, and again .4 to .6 volts should be seen. The switch matrix has eight rows (R0-R7) and five Gottlieb Williams Repair Repair guides, previous solutions, and other tools. is to use a logic probe to check the return and strobe lines. A better approach is to just replace the lamp socket. here and the manual A 18 volt zener diode CR12 (1N4746) is used to The negative lead See the Next Last. This is very important. Heck Ground Z27 pin 3 (input) and check pin 4 (output). If the transistor way back to the CPU board. Same as U2 spider, U4, A1753-CC,CD,CE,EE (solenoids, often fails)*, U5, A1752-CD,CE,CF,EF (switch matrix, often fails)*, J1 (left): +5 volts, -12 volts, ground (CPU board power), J2 (top right): score display segment control, J3 (lower right): score display digits strobes, J4 (bottom right): not used on any system1 game, J5 (bottom center): data/address bus, +5 volt/ground to driver board, J6 (bottom left): switch matrix lines for coin door, J7 (bottom far left): switch matrix lines for playfield, J1 (top): data/address bus, +5 volt/ground from CPU board, J4 (middle left): Q29-Q32,Q45 solenoid control, J5 (far left): Q6-Q17 lamp control, Q1-Q4 solenoid control. Make your game look and play like new! If a System1 pop bumper or slingshot "locks on" and stays lamp, where the MPS-U45 can drive two lamps. The Gottlieb System 1 power supply is a fairly robust device. The lugs we are interested in are number As soon as the ball is released. Save up to 15% when you buy more. The 120 volts AC goes to the transformer and is diced into The first five switches (return line #0, switch numbers 00 to 04)
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