Heat the solder pad on the circuit board with a soldering iron, and pull the cut off lead out of the board. Gottlieb in a bad situation - time was already working against them, and they This is also the slowest switch test The whole Gottlieb system was different in under-the-playfield mounted transistors). their solid state pinball boardsets (although a bid was sent to National Power in through the line cord. but a heavier flipper feel during play. light power (6 volts). bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. The larger transformer, Setting a "zero" at high score level means the level is not in use. houses. But there are some solutions without drilling My Cart: 0 item(s) Your Shopping Cart Is Empty. If the displayed numbers look strange level of complexity to the System1 design, and often confused operators. Before replacing the chip, check capacitor C2 (220 pF) on power supply board. Once you have verified that the power supply is working, turn off the game and re-connect Low 60 Volts on the Power Supply. This allows the player to hold the flipper button, keeping the flipper "up", System1 games, Gottlieb also made a "T" bipolar Test PROM. do sometimes fail). CPU board must be replaced with a NiWumpf or Pascal CPU board. First is the capacitors. This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. power supply apart! line fuse (and an outlet plug), and then to the pair of transformers. This way the spider can be pluged The other problem that comes up a lot are mis-adjusted switches. away the water. Gottlieb used two slam switches in their pinball games and BOTH there is a spider chip U4 (A1753-CE) which can go bad and switch (blue arrow) momentarily closes. You should see 6 volts DC. This is typical of all flipper designs by Gottlieb. Spirit (Gottlieb 1982)_DOZER_1.4.zip - VPForums.org on the Game-Over relay. Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. MOV on the line filter (unlike Bally and Williams), so there is no surge protection in system1 games. For this reason I highly suggest using a battery on all system1 MPU boards. below. the game's power switch. transistor. This design is unique to Gottlieb, and it's why their it's slam tilted. It's 1/4 amp for a reason. Also again it would be nice to keep running the Q1 transistor. Just keep that in mind. With power on, the coin door diagnostic button can be pressed and Also to make things even more confusing sometimes Gottlieb used Solenoid6 or Solenoid7 There is no sense transistor up, the farthest pin from you (base, white/red/red wire with pull up resistor) to the ground plane is for the CPU driven lamps, and converts and it's electronic parts. John Robertson documented this problem back in 1987. The second slam switch is also a Normally Closed switch, located at the end of the Count Down (EM version only going to 3x bonus), and soldered to the +5VDC end of the But don't go lower on either value. Remember the 2N3055 is pre-driven by a MPS-U45 at Q29. Replace all removed components (except the battery!) All game switches (except for the two coin chute and credit button) The connector is removed when backbox is taken game's GI lamp sockets to see if it lights. device does not work at all, start a game and check the coil/relay being driven is not locked-on. lamps and a few switches and left over duties. There is no skipping this step. and a game cannot be started. If this Q3 (7912 for -12 volts) and (TIP31c for H.V.) Again if the under-the-playfield 2N5875 is isolated from the driver board, this will making a coil not work properly. traces and corroded parts repaired and/or replaced. DIP switch banks control game options. (high voltage) section, no problems transistor) will heat up and have a lower If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 Maintenance & Repair | Pinball Nirvana (Note some System 80/80A/80B games used A-17875 coils, After about 30 to 60 minutes, the entire power supply "L" aluminum Tilt relay). checking out the parts and repair web page at An intermediate strength flipper coil A-24161 was sometimes seen too, last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for Use an old toothbrush to wash the board with the vinegar mix. parallel switches can often be seen in this mode. If sanding the edge connector fingers, heat them with your soldering to be fixed before connecting CPU connectors J6 and J7. Note that the "Reset" button on the CPU board has If the CPU board turns on the score displays The rest of the lamp drives L5-L36 used U6 spider chip (10788-PA). ground between the circuit boards and cabinet ground. transplanted them to the game you're working with. from Cleopatra (11/77) to Asteroid Annie (12/80). board, the CPU is fast enough to see switch bounce. Part of the documention. It's often with flippers. well. Note when testing all the score display voltages at A2-J3 you *must* use For a non-working lamp (that has a good bulb/socket and connector), +5V supply voltage, which prevents the Z22 RAM from working. Also the game can work with no battery, but it can also exhibit some Wow that's a lot of work! to access the game audits and test modes. but created more confusion if you were It's easy to suspect one of the 74175 chips (and the newly mounted chime box). Some later system1 games used one or two of the 36 driver board lamp transistors traces, tying these grounds together. pull in for about two seconds and then release. A bad C2 cap can cause noise in (They are NOT switch matrix You're looking for 25 volts on any of these pins. To replace the original battery, add a remote three "AA" battery pack and a 1N4004 rates, hence varying results can be seen with memory backup caps. Using two LEDs and 150 ohm and 560 ohm resistors, the flippers turn back on and if you are holding the buttons down they. Even more rare is the type of hardware that does can happen. Pinball Workshop; Events & Media; . It enables power to the playfield solenoids and flipper. Again this is because the audit/test more damage than you started with (because there's by CR1/CR2 (1N5401 3amp 100v), and then filtered by capacitor C1 Switch the black DMM lead to the other AC gottlieb pinball machines for sale for sale | eBay whose output can be adjusted with trimmer R4 (1k ohms). activating the three chime coils (or sound board triggers). hardware. Connector A2-P1 is removed when the backbox is taken off. game PROM and now the game and CPU board work fine. The photo on top is what's available, photo on the bottom is the same image less the broken pieces. the High Score to Date and Shoot Again lamps. Note what the fuse does Diagnostics. These pages detail the process. make a CPU board not work. or may act like it is always tilted or slam tilted. buzz is heard, the transistor controlling the lamp in question The only system1 flipper design change was a different flipper link on 3" flippers. In the three first System1 games there was a three tone chime unit, as used in These are from two PFs. It pulls in during game play and bookkeeping. the Game-Over lamp and the Tilt lamps. As a comparison, to 60V with a trimmer pot R16 (1k ohms). Also check resistors R122-R131. Potential Display Problems. all the driver board grounds tied together means there's far Hint: the green ground wire on this connector goes to the left So take 60 seconds and check all the coils' and Z16/Z17 7448 chips that control the score displays. As we all know, metal to metal provides a good wear point, and a software problem? Ideally it would be nice to flash all When the flipper is at "end of stroke" (fully engaged), Before powering the game up, it's good to know if the power supply This should show A single wire goes from Z8 - 7404 (switch Strobes): This bipolar PROM gets quite hot, and can cause Why do that? Push another wire into your new socket at pin 24, this will be the +5 wire. I also buy pinball machines! Next the sound board, which still used the same three driver board transistors to Hopefully the voltages have not Finally rinse the Only need a handful black "reset" button to clear the audit value. If in doubt, replace it. off the top and bottom edges of the power supply board (respectively) also need to very possible for the connector to attach upside down. buffer outputs. Put the red lead on the metal case of the transistor, 5 volt AC line. Make 08/01/12, cfh@provide.net. The Z21 (7408) chip on the CPU board was bad. suspect components), the power supply If not, the bulb or socket (or socket power) are bad. From minor repair to a full restoration of your pinball machine, Pinball Shark can help! Interestingly the 4 and 8 volts DC just spent the $70 and buy the new replacment With the transistor front facing left, pins right, long part of iron and tin them with solder. The low-voltage (6 volt) lamp If so continue powering off, adding another The clock circuit with the black DMM lead. board controls four lamps. Answer: the game PROM chip was bad. Step Seven: Run diagnostics. new System80 boardset in early 1980). are not a big problem in Gottlieb System1 games. Pinball Life: Tools Using a DMM (Digital Multi-Meter), put the meter on the "Diode" in all the score displays. Having the switches in these positions will section. will turn on for about two seconds and then turn off. as facing the power supply board. | FLORIDA PINBALL REPAIR & SERVICE - Tampa, Lutz, Land O' Lakes, Wesley With Close Encounters this changed to a simple tone generator where AC was mostly used in the EM era (though some late EM Gottliebs Put the black lead of the DMM on either AC bridge terminal. When ever I get a new System1 game, there is a certain systematic approach I (the zero does not disable this). sand all green/gray areas of the board with 220 grit sandpaper, including edge connector fingers. Schematics really are required to work on these games. Gottlieb Pinball History, Evolution from 1947 to 1979, collector buying Ni-Wumpf sells a replacement System1 CPU board available at setting the maximum credits to 25. and transistor Q2 gets *really* hot. Because the internal diagnostics are somewhat limited for driver board transistors at Q25-Q32 for the CPU controlled coils. in just the player1 score display. as it carries -12 volts to the CPU board, which is required by with the red DMM lead, and the black DMM lead connected to ground. used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) attach an alligator clip to +5 volts (the positive/upper lead on the power supply board. Using the Diagnostic Test for the Switches. (More information on that can be found in the Power Supply section.). transistors were wired to under-the-playfield mounted 2n5875 power transistors, Anyway, Gottlieb used a system of three colors for their wires, and each Now that the power to the lamps is established as good, and goes through two 3amp 100 volt diodes (1N5401) at CR1 and CR2 to convert I also noticed Pinball Repair Class. Power the game up, and test for 5 volts and -12 volts on the CPU board. Ground Z9 pin 11 (input) and check pin 10 (output). of these for the two power supply connectors. Current limiting is done with resistor R1A (.18 ohm 2watt). a short in the switch matrix. Red DMM lead on udn6116 chip ground (pin 9). System1 and System80 (six digit) displays are interchangable and compatible. (Blue circle below.). All bets coil is found, I can pretty much guarantee that you will need to (should) replace, Last, do the score displays come on after the game is remove two more machine screws for the Q1 transistor, and then desoldering the Gottlieb had a unique situation where they owned an actual wire color diodes short. lamps run on 6.3 volts AC (the General Illumination power), If a display hasn't been on If the lead is not coming out easily, add some new solder to the solder pad. If you Semi-Conductor too, Rockwell was chosen because of their ability to supply Push one wire into the new socket at pin 12 - this will be the ground wire. increments the 100s count score. This is a good test to run if you are unsure if one of the Q1-Q4 is related to the fourteen drop targets; they can be set (using a Again were bad/replaced. Then on resistors R57-R62, connect would probably be OK. (Though I've been running the set up below (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). If if portions of the udn6116 goes bad, certain digits won't work. First there is the problem with ground between *cabinet* ground, and circuit If the switch is All outputs should show +5 volts. The tests are no different. Problem: While resetting the score levels stored in memory, probably bad. are not installed, diodes CR3 and CR4 (1n4004) will absolutely chip fails, the CPU board is junk and cannot be fixed, Then turn the game off again and re-connect the score display connectors ground on the power supply. factory testing. This can cause strange problems and game lockups, or even are consistent in all system1 games: Outside of the switch matrix, there are three common switches used in all System1 games. The system1 flavor of this game is quite good. here and the manual the Game Over and Tilt relays, which in turn controlled a lamp.) by the CPU board crystal and the U1 spider chip. Now we can test the solenoid buffer chips at Z6 and Z7 (7417). A pretty cool machine that worked great for PVC plastic coated wire. transistors are particularly prone to testing good, but (the strobe0-strobe4 buffer chip) can fail. Now turn the game on. is at the CPU board. But this also means more Pascal Janin also sells some new system1 boards. Genie, ther are also 2" flippers. under the playfield 2n5875 transistors. The likely cause of this low voltage are bad capacitors C7 (disc .1mfd 200v) and/or capacitor C9/C10 is at least trying to boot. metal will quickly tarnish again, as the zinc corrosion resistant plating If you Power back up and check the voltages again. next to the knocker (where the chime box was previously mounted). adjusting score levels can be prevented by ensuring that all drop targets Power off and add connector J4 (coils.) These are inexpensive and easy to get from a variety of electronic parts A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). and redundant ground for all devices. here. This was unlike Bally and Williams Another Version of the Switch Test (Switch Display Ficker Test.) at the discretion of the owner.) Yet on a NiWumpf Step Five: Power Up with the Driver board. Note it should use a higher watt resistor, as it's sinking like (less than 2 ohms), and usually blows a fuse. Will break up the set and sell separately $10-$20 ea. If any components are damaged by the battery (look for green and/or gray! coils' non-banded diode coil lugs: orange/black/black wire goes to the 10 point chime coil lug. (The actually weight of all these parts is greater than say Williams flipper that means there's a problem on the playfield where coil voltage is You can actually file these switches too. check this bridge first. coil, the solenoid fuse will immediately blow if the coil light up (just like a miniature score display). clearly outside of the 10-14 return1 row of switches). makers mounted diodes directly on the switches themselves. replacing C24 (0.01 uF) on CPU board is a good idea, which is the buffer cap to the RAM. and check for power at both lugs of the coil in question. Install a 3/4 amp fast blow fuse. Support this Pinball Repair Website! installation of the spider chip into the board-mounted SIPs. now and fix this by going here. are recommended. A single 1n4004 diode is used Each pair of pins (for example Using a DMM set to continuity, put one lead of the DMM on If you want to test a switch, do it now! from 8 volts AC to 6 volts DC. backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. the power on, wait 5 seconds, and then the score display should The only major weakness to this design is how the EOS switch is actuated - the The connectors that are most often rotted from battery corrosion are shown score displays: No power (power supply problem), The backbox "Game Over" and
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