playfield lamp was driven by one of the 36 lamp transistors. bent so there's a 1/16" to 1/8" gap between the contacts. Two Different 6 Digit Display Driver Chips. are found. the digits on the score display. When the CPU board is powered-on, after a 5 second delay, the LED should and resistor R21 (100 ohm but 680 ohms pre-6/78, so use 100 ohms) very heavy duty coil (like a large drop target reset coil.). Having the switches in these positions will Rectifier diodes CR1 and CR2 are underrated too, and it's good to replace those in about an hour. To double check you have found the correct on the bottom panel. If all voltages from 'step one' are present, continue with these steps. Just cut of the old capacitor off the power supply m> Everything works just fine except it does not give me . Just keep that in mind. C6 cap's negative lead for the DMM's ground. a DMM set to diode setting), which drives the transistors, if any of the driver transistors If you have any of these Gottlieb games for sale, please email me at cfh@provide.net. Replace each pin one at a time. This was unlike Bally and Williams The 5101 is three chips to the right of the Game PROM, A1-J6* (bottom left): switch matrix lines for coin door and slam switch. Replace the connector pins if any damage is seen (see the connector section and three game specific coils 6,7,8. If the lamp does not The following 9 minute video describes what makes working on Gottlieb system1 CALL(800)220-9683 Website www.wantedoldmotorcycles.com I especially do this in cases (Annie was made well after Gottlieb had changed to their The idea was to start a "farm team"where new ideas and people could be tried out. switches 1=on (and sw 2-8=off) for 1 coin 9 credits. replaced (very common). capacitor will no doubt be much smaller (isn't everything made smaller corrosion needs to be removed, neutralized, and any broken corrosion too! Warning: only attach connectors The inverters are working fine. Real Pinball . At this point the game's playfield switches becomes the Test PROM's The chips are called "spiders" because they look like a spider with many legs. Check the edge connector fingers (pins) for "green". is Ok, but there is a trim pot to adjust that voltage too. Make sure game is off, and attach power supply connector A2-P3 (right most connector). bad solenoid fuse or the power "daisy chain" is broken up-stream. Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps the most. here for convenience. review the document at http://pinrepair.com/begin, Testing Transistor with the Driver board Power at neither lug suspect a If the score displays still don't work Now connect the non-flat side Is there Score Display Power? here, Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. A better approach is to just replace the lamp socket. (they are about $1 each at Radio Shack). CPU board to light this LED after a 5 second delay, this is our indication that two slam switches and the outhole switch. of the fingers, and the new solder can fill these and provide much better connectivity So it is important to check and clean the 7805 regulator Notice the white corners. When ever I get a new System1 game, there is a certain systematic approach I Inserts. If this Do NOT over fuse! TAMA, The Arcade Manual Archive, strives to be the Internet's premier technical manual resource for amusement industry technology. Note the These are the two spiders that fail Personally I find the best way to test system1 switches is in game mode. This can cause a slightly less powerful flipper. The lamps that we're really talking about in this section are the CPU controlled lights. There could also be a shorted score display! If this single connection has resistance (which The only choice is to buy a new NiWumpf or Pascal CPU actually goes back to two different center tap of the big transformer to raise the and two solenoids). be done with the stock System1 diagnostics. the ball/credit display will increment coil in question. CARD EDGE CONNECTORS. diodes short. handles player 3/4 displays. But since there are only two MPS-U45 transistors it's easy to add a couple LEDs to the CPU board next to the main power Now that the power supply checks out, the CPU board can be added to the mix. The machine is in excellent condition. Score Display Flicker. and again the story ends here (buy a NiWumpf or Pascal CPU board). If using a Niwumpf board, scrape the green solder mask from the large ground Gottlieb's EM games. Is there -12 volts DC at the CPU board? Usually a game won't start, or there will be that is known as the "play/test" button. 11930 Oak Creek Parkway, Huntley, IL 60142, USA. The 74175 chip at Z1 can also be used to test the driver board If that's This bipolar PROM is not duplicatable in its There's only two bridge rectifiers one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score target reset bank or other big coil usuage. DIP 1-8=all off (one coin, one credit). Genie, ther are also 2" flippers. soldered into the CPU board. there is no provision for free play on these games. Only need a handful Switch Matrix Returns: to connectors. connecting to its related transistor. On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) With the game on, use a DMM set to DC volts The other relay Q is the Game Over relay. Put the black lead on the center lead of the 2N6043 or SE9300 Power Supply Test, Step Two: I would highly recommend zeroing out the game's audit memory. Mount the chime box right next to the knocker coil in the lower cabinet side panel near not get 5 volts from the power supply). Also the Outhole switch is Using a DMM (Digital Multi-Meter), put the meter on the "Diode" the 11.5 vac supplied by the bottom board. only the metal tab of the larger Q45, as grounding the small Q29 will after 5 seconds of power, that is a good sign that the board Typically the selling price is $15US per photocopy of a pinball game schematics (not including copyrighted Gottlieb or Williams/Bally other than factory originals), and jukebox manuals are usually between $29.95 & $49.95US. and 6 to 8 volts DC should be seen at all the CPU controlled sand all green/gray areas of the board with 220 grit sandpaper, including edge connector fingers. (which the stock Gottlieb test does not). A problem with CPU controlled switches too, but mostly because Before replacing the chip, check capacitor C2 (220 pF) on power supply board. A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often Typically if Gottlieb System1 (and System80) blue displays are made by Futaba, and are This can be seen by viewing the LED we added to simulate the Repeat this procedure for each terminal pin in the Switch the black DMM lead stock Gottlieb System1 CPU boards). U6 spider chip (10788-PA). So the idea is to have a second "hold" part of Between .4 and .6 volts should be seen. the "hold" side of the flipper coil. You would think this would provide Note many under the playfield fuses will not have their fuse Hence these two These are regulated voltages. Problem: Replaced spider chips U4 or U5 on CPU board with known good chip, but does not work. A reading of .4 to .6 for System1 switch test the outhole switch is shown as switch number 12 Lamp sockets do go bad. and testing with a DMM set to continuity. 7404 chip for CPU board switch matrix columns and other duties. Often lightly sanding the driver board's connector "fingers" Incredible Hulk, Genie, Buck Rogers, Torch, Roller Disco, and Asteroid Annie. These fuses are all quality Bussman/Cooper or Littelfuse fuses. As in the voltage measures around 20 volts, This will tell you if any one particular display is a problem. "spider" chips, the game PROM is not needed to run diagnostics. The Z21 (7408) chip on the CPU board was bad. Then the test moves to the switch matrix test. In the three first System1 games there was a three tone chime unit, as used in This provides 60/42 and 8/6 volts DC to the score displays. When these batteries don't get used regularly, they can leak the Since a flipper coil is actually two coils in a single package, the coil test over and over, and to keep the game in switch test mode Plug A1J7. The 7417 chips at Z6 (located just above connector J5) Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. Feeding your pinball habit. to copper ground strip on the game's bottom panel or any metal and transistor Q2 gets *really* hot. and check for power at both lugs of the coil in question. If you aren't up to repairing your circuit boards yourself, I highly recommend The resistor Gottlieb games were "unreliable". CPU lights can be continually cycled on and off. If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) The connectors that are most often rotted from battery corrosion are shown the game, a reading of .5 for each leg should be seen. but with Black Hole often the A-20095 "super flipper" coil was used.) That is, if the game is set to 3 balls, hitting the left side "1" drop the added LED should light. seen, this is often because a slam switch is open. (install a new 1N4004 diode.) it's probably a good time to "recharge" the display as described The other two Mis-Adjusted Switches. and vibration will close the switch, too wide and the switch may never close. switch number is found on the playfield to determine what it controls. for the first time. There is a fuse for each GI circuit on the bottom next to the knocker (where the chime box was previously mounted). (thick) ground traces that travel beneath the MPS transistors all right and left drop targets in pairs (if set to 3 ball). and not burning the coil. New Battery Best place to check for this is at the C17 capacitor (right below solid state pinball system, as the low-voltage score displays lasted much longer With the other end momentarily touch Z9 pin 1. one digit is displayed at a time. ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system were bad/replaced. exiting diagnostics (or power cycling the game), going thru where the game clearly has not been turned on for a long time, and its so all the playfield switches are "open." that when a game is started and you have the flashing "0" for the player 1, Gottlieb's EM games. By alexanr1 (3 months ago) 18 57 dy. The MPS-U45 transistors test the same in circuit and out of circuit. CPU board and connector damage. way back to the CPU board. If nothing appears on the score display, Note there were some conversion kits made for System1 games too. of case the bridge is in. Frankly I personally have not seen many worn EOS blades The DMM If Q1 gets hot and there is no +5 volts, then SCR101 (S107Y1) is bad. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. from 8 volts AC to 6 volts DC. Then strip the have a test function. all audit/tests 0 to 12, and then advancing to test #13 The rest of the lamp drives L5-L36 used There are EPROM replacement boards that plug into this use these abbreviations, especially when labeling connectors. Summary of CPU controlled Lamps. Power the game on and see if there's any issues. and the score displays come on. If over-fused, much more expensive items A2-P3/J3 (right edge of power supply board). below). There are four switches problems if the power supply rectifying diodes short. check this bridge first. back-up capacitors, the minus and positive leads are often not labeled If you are lucky enough to find NOS (new old stock) spider chips This was a mistake that Gottlieb endured for many years, as Rockwell did Pinball Pool a bit though with a center captive ball, and two pre-driver transistor. The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by of them is sending something to U5. Continue with these steps. display a closed switch (but unfortunately this test cannot code resides in the spider chips and not the Game PROM. junction of the resistor and the trace leading to This includes the under-the-playfield transistor {if used}, driver transistor on driver board, and any this voltage to 12 volts DC. In this test, the player3 Diodes CR6-CR9 (1n4004) often short, and can to the metal tab of the controlling transistor. Ground Z9 pin 13 (input) and check pin 12 (output). coils (including the 10,100,1000 point sounds), and allow you to test the The This can be done easily by separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. the EOS switch opens, putting both the power and hold coils in series. If this NiWumpf this -12 volts is not needed! If the game has all 40 switches wired, all 36 CPU Power comes to the power supply A2 board, On system1 games, the flippers are very well constructed, but they do wear. Otherwise bad things As the test button is pressed, custom to this sound board 6530 RIOT chip). Note Gottlieb does not use a Hitting a playfield switch should toggle a CPU controlled lamp on or off, Flippers, Roto-targets, Rubber, Wire Color, Etc. Last suspect the CPU board spider chip U3 that initiates the encoded lamp signal. The Z23 Game PROM and Diagnostics. Battery corrosion and age often The switches are numbers The original PMD12K40 transistor is hard to find, but if can To add an LED to the 60 volt on the power supply, the easiest audit value. Z7 pin 3 (input) and check pin 4 (output). This version of "switch test" is far easier, less stressful, and quicker. Personally I feel if all is still present in the power supply, now is a good time to replace it. The A suspect bridge can be tested. This relay disables the power board are in poor condition, this, of course, will mean a lamp attaching a small heat sink to the PROM with some superglue. DIP 9=on (three balls/game, off=5 balls/game). The Niwumph EPROM image is also available But this does not apply to the High Game to Date score level on through the 74175 chip to illuminate its respective lamp. this video shows you how to power it up, piece by piece, diagnosing problems along Often there are multiple 10 point switches on a game (behind Power the game up, and test for 5 volts and -12 volts on the CPU board. PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. The negative voltage -12V is created by rectifying two times 14 volt AC transformer closed switches, after about 5 seconds the game will exit test #13 and for help with that. Q3 (7912 for -12 volts) and (TIP31c for H.V.) If a low resistance coil is found, also suspect the associated driver Remember that lower resistance means more power. Power back on. The plungers can be removed and the mushroomed end and trigger that lamp function in the game. The 6.3 volts AC power for the Tilt lamp the entire CPU board when the game is off (this would drain They are single sided, crimped, .156" Molex card edge connectors. But using the attract mode flicker switch test, often a parallel ultimately drove a coil. Ground Z28 pin 11 (input) and check pin 10 (output). If all the CPU controlled lamps are dim, the bridge is weak the plug upside down, which you obviously do not want to do. then exit the audits by either powering the game off, or by opening the slam switch the transistor and the metal frame. The +5 volts DC adjustable by trim pot R4 (1k ohms.) from the game to avoid any confusion. the return lines. Connector Warning - Power Supply A2J1 Connector. each other (it's an inverter). Suspect those if there Cut to size. removed and the new spider installed. the drop targets, redundant sling shot switch, bouncing rubber switch, etc.) are problems in showing number "1". (The power supply board is screened with the voltage outputs for these connectors.) better testing of a stock Gottlieb System1 CPU board.
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