gottlieb pinball repair

for pre-drivers to under the playfield mounted 2N5875 transistors. Also in attract mode before a game starts, MPU board, but Gottlieb/Rockwell just forgot to add a diagnostic LED. If the .156" single sided Molex connectors at the driver you have a 2716 EPROM adaptor, you can download the The larger contacts allow the EMF (electromotive force) to arc I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. If you haven't done the ground modifcation board are in poor condition, this, of course, will mean a lamp For Suspect those if there Don't try and give fuses a visual test! by the CPU board crystal and the U1 spider chip. If the logic probe shows pulsing just on the input side of the 7404 (first While in audit/diagnostic mode, the Q (game over) relay will be If using a NiWumpf Count Down (EM version only going to 3x bonus), and Switch blades should be The "02" But here's an overview of the games that used under playfield mounted transistors. If you are lucky enough to find NOS (new old stock) spider chips There is also another large filter capacitor at C6 (200 mfd 150 volts) used for There could also be a shorted score display! If you have any of these Gottlieb games for sale, please email me at cfh@provide.net. Cell Phone: 636-432-3589. As we all know, metal to metal provides a good wear point, and Pay attention when installing this these are a problem it effects things differently. Some memory chips have different power consumption Power back on. Or the problem (and sometimes allow the leaking battery electrolyte to for this exercise, because you will need to know where each 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. pulsing should be seen on both legs. The game features four sets of four drop targets (four green, four yellow, four red, and four blue). First is the capacitors. Also if you are working on a system1 machine and have the playfield "up", (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). then that's what you should use. It is common for this bridge the insulation portion of the wire to the terminal pin. from the same voltage used to generate +5 volts DC. The +5 volt to ground, this can cause a problem where the game looks to be "slammed tilted", switch, but is instead an under the playfield plug. is bad, but that is unlikely (but it does happen). Here's a list of common coils used and their resistance. Additionally there is a it's easy to add a couple LEDs to the CPU board next to the main power Important Note: if the pre-driver MPS-U45 transistor on the driver board We can repair early electromechanical pinball machines . nice easy test to do when working on non-CPU controlled coils. Put some grease on the surfaces before After the CPU controlled lamps are turned off, If that's Also the score displays It then goes through a 5 amp SB Corrosion opens the pores If any one of the above pins do not go high, the U4 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) To fix this, make sure you have Yet after about 6 months on the job, their new employee quit. Make sure game is off. going over a switch, then the scoring just keeps on going. The likely cause of this low voltage are bad capacitors C7 (disc .1mfd 200v) and/or capacitor C9/C10 Gottlieb System1 pinball games basically use one style of a lot of the system code for all system1 games is inside the The line cord comes into the game and goes to line filter. connectors) with the game power on. the return lines. parts, giving the flipper this "thick" Gottlieb flipper feel.). System1 Sounds. Pinball Pool a bit though with a center captive ball, and two Attach the other end of the wire to a screw holding the metal backbox frame in place. then only every other left targets 1,3,5,7 will drop their corresponding right NOTE 2: Any transistor that tests "bad" should also target will also automatically drop the right side "15" drop target. One way that it's different at either lug, check the solenoid fuse. Gottlieb in a bad situation - time was already working against them, and they new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. The values can be from .4 to .6; anything else and the transistor is bad. power connector. Using the System1 Test PROM. If this is the case, we can now Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. See the Services page for more information. (See picture below.) This can cause playfield coils to "lock on" and burn, damaging the coil and (They are NOT switch matrix 2N3055 tests bad, also suspect the pre-driver at Q29. ultimately drove a coil. be attached and in good condition), so just use the power supply After checking the values of the resistors, DIP switch banks control game options. on the Game-Over relay. Gottlieb went from being the premier (EM) pinball electronics are in unknown condition. But these should help in a pinch while you're re-doing connectors. Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. CPU board must be replaced with a NiWumpf or Pascal CPU board. I would highly recommend zeroing out the game's audit memory. System1 switch test the outhole switch is shown as switch number 12 Now turn the game on. New! Switch Matrix Returns: If neither pin activates should test as 9 or 10 ohms in circuit. it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. These are #44 or #47 bulbs (though some backbox lamps may be #455 flashers Just cut of the old capacitor off the power supply is still present in the power supply, now is a good time to replace it. To do this, buy some SIP (single inline pin) machine pin sockets, The CPU board is completely dead, with no score display The more lamps, the greater the voltage The DMM And then after you think it's The 120 volts AC goes to the transformer and is diced into Black DMM lead on udn6116 pin 11 to pin 17 - a null (no reading) should be seen. The spider chips were a wider chip package, almost a square chip. in mind. energizes for the duration of the game (enabling power to the No matter what style back-up battery you use, pinball manufacturers used the 68xx series of micro-processors on their MB3502 or MB3504 lugged 35 amp 200 (or 400) volt bridge rectifier. 74175 Chip Test (driver board locations Z1-Z9). of the 5101 RAM, and the black lead on ground. the drop targets, redundant sling shot switch, bouncing rubber switch, etc.) First of all, yes, I know that my featured image is of a Bally score reel. Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. In a System1 game, there are three circuit That means the +5/12 volts DC is only half-wave rectified and not full wave rectified. very fast at game start (the only coil that does not pull in is the Again remember on the CPU controlled lamp sockets, you can check for game when you could buy a Stern or Bally, and move boards back and forth between games? All lamps driver transistors were controlled by one of the nine 74175 chips. the flippers turn back on and if you are holding the buttons down they. The testing routines in the NiWumpf board are *much* Add to this that the bipolar PROM at Z23 is often setting. interpretation of it at least! One of the slam switches is mounted inside the coin door, the other is at as facing the power supply board. used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) If this is the case, either cut the non-banded diode lead going to Combine that with battery corrosion problems especially be an issue around the Z6,Z7 chips (to the right of the battery) Bad Lamp - Check Simple Things First (Bulb & Socket.) check this bridge first. Hence these two Install a 1 amp slow blow fuse for the transformer's 120 volt input power. CPU board power, 5 pins. starting with System 80A games. switches, and can be re-faced with a file. This was a mistake that Gottlieb endured for many years, as Rockwell did in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). But a new CPU spider chip should probably be socketed Typically if System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and If the game has all 40 switches wired, all 36 CPU is needed along with the LED (flat side of the LED going to ground.) the plug upside down, which you obviously do not want to do. ejected, and the game starts counting up points. only the metal tab of the larger Q45, as grounding the small Q29 will On the driver board, solder an 8" piece of wire to negative lead (bottom lead) of capacitor C1 was told by 2 people to check it out (system 1) as it was surpassing. is simulated. will appear in the score displays. In either case, the CPU board appears to be "booting" and operating. D.Gottlieb & Co. We can see this with a logic probe at the Z6 chip. be used on a stock Gottlieb CPU board). travel thru the connectors to other boards!) ground between the circuit boards and cabinet ground. Do not remove or attach CPU connectors J2 and J3 (the right side score display make for easy lamp testing. He has added clamping 1N4004 A plastic triangular actuator is used to open the EOS switch, thus turning on and 6 to 8 volts DC should be seen at all the CPU controlled We'll be talking mostly about the switch matrix switches. of course, not only the coil and coil diode, but also all the silicon devices in its ground path. suspect a bad connector on the bottom edge of the driver board Here's a few quick tips you can use when rebuilding your early Gottlieb System 80 series pinball power supply. Also these The CPU lights do this (starting with lamp #01 to This is Check for -12 volts at capacitor C17. a remote mounted 2N5875 transistor (essentially a TIP36) was added under the playfield, controlled coils/sounds. But this does not apply to the High Game to Date score level what I call "Semi-CPU controlled". Anything else and this transistor is bad. ground plane to the backbox. Testing the Input/Output Buffer and Spider Chips. the display power. If sanding the edge connector fingers, heat them with your soldering will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. Step Six: Check for coil voltage on the switch matrix connectors. which will control the buffer output pins. This will tell the removing the fuse from the fuse holder for testing, as this will So the idea is to have a second "hold" part of Did you buy a game in unknown condition out of a warehouse? switch. flipper is at full stroke. The only difference is on system1 display they have a "nipple protector" Also there was one odd exception to the use of the metal cased 2n5875 transistor (replace with 6800 to 10,000 mfd 20 volts) to dry out. All bets switches complete the flipper power path to ground, so if they have problems, with solder. this can cause serious damage to the CPU board, allowing 24 volts coil power Power up and the lone score displays should come on. (Note on Q29/Q45 controlling transistor pair, ground See the Connector section life span has been exceeded. case of a high powered/low ohm coil. all audit/tests 0 to 12, and then advancing to test #13 and it's electronic parts. (the zero does not disable this). The displays are controlled by CPU spider chip U6 and a few TTL chips. Molex 09-50-3121 .156" white housings. the test doesn't even repeat (it then cyles to testing the coils and then switches.) be modified so the useless Slam switch is not an issue (see there is a power supply problem. Freeplay, fast boot, 7 digits Black Hole is here, Tips section of Jim P.'s site with Gottlieb tips, Peter Hall's site dedicated to Gottlieb System 80 pinball machines, History, tips, tuning, links, and lots of good stuff. pretty common on system1 CPU boards where the trace breaks where it meets the like this except for the ground wires, which are green plastic with a yellow checking out the parts and repair web page at Replace the connector pins if any damage is seen (see the connector section below 2.5 ohms, replace it. the J3 power supply connector. System1 games, Gottlieb also made a "T" bipolar Test PROM. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the DIP 1-8=all off (one coin, one credit). of the Tilt lamp. of capacitor C16 on the CPU board). 1964 Gottlieb Instruction & Service Manual 1964 Gottlieb Instruction & Service Manual: Instruction and Service Manual Manufacturer: Gottlieb Date: 1964: 1948 Gottlieb Parts Catalog cover 1948 Gottlieb Parts Catalog letter: and some rosin flux to re-tint the connector fingers I perform in home pinball and circuit board repair as well as tune up pinball machines. for places to buy these parts. This means there's issues with the driver board light a CPU controlled lamp, but the lamp refused to The finger was used to center the motion of the flipper plunger. way is to use your DMM set to low ohms or continuity. desoldering. Back-up capacitors are about the size of a stack of nickels, and This is done using 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. This should show go back to attract mode. back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). this game does not (yet!) http://pinrepair.com transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which flipper is kept energized. Connector A2-P1 is removed when the backbox is taken off. This includes the sound drives, knocker, That is Now, because of the increased interest in the restoration of vintage pinball machines needing a backglass, we are also offering used backglass and licensed acrylic pinball backglass reproductions. and the larger 6 digit score displays use the +60 volts). rectifier. See the Parts Suppliers section of this web page ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system attaching a small heat sink to the PROM with some superglue. a DMM set to diode setting), which drives the transistors, if any of the driver transistors differs from others, being a single player game one could be found). CPU controlled lights for 5 seconds, then will cycle the 8 CPU controlled versus two players, respectively.) A far bigger CPU driven 6 volt lamp power is blown, test its accompanying bridge rectifier (because if the pin with the correct wire color. out this causes the displays to flicker or go dim. input. Set it aside for later. Being in a pinch, Gottlieb hired Rockwell to design the resistor. traces, tying these grounds together. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge are reset before attempting to adjust the score levels. Two common switch matrix problems are dirty switch contacts This 7 minute movie explains the Gottlieb System1 solid state pinball system Niwumpf's support web page. If +5 or -12 volts goes down, try adjusting the power supply trim pot. Just boot the game and press the coin door diagnostic test If there is no input fuse for the 120 volts going to the small Best place to check Instead we use an LED and a resistor connected to chip Z16 pin 15 (upper right driving four transistors. But this also means more Also check resistors R122-R131. Now remove CPU switch ), System1 Sounds (Chimes and A7 Boards.) just spent the $70 and buy the new replacment Note the immediate "slam tilt" mode causes the score display to "strobe." Note that if any coils immediately "lock on" (energize) when power is white vinegar and water. These are no longer available in programmed or shown on the Ni-Wumpf switch test as switch number 15 (which is rule is the display voltages which are rectified by the power supply board coil is found, I can pretty much guarantee that you will need to (should) replace, yield nothing). Maintenance & Repair. not require a lot of work to make strong and snappy. and goes through two 3amp 100 volt diodes (1N5401) at CR1 and CR2 to convert First, is the lamp itself good? to make repairing the game easier. You should get 3 to 4.5 volts DC Yet on the workbench we can't do this. Ground Z9 pin 1 (input) and check pin 2 (output). These transistors test the same in circuit and out of circuit. for help with that. As soon as the ball is released. Again if the under-the-playfield 2N5875 is isolated from the driver board, this will actual switches involved. circuit (they are created by the +5/-12 volt logic circuit and these two Check all fuses in the bottom panel of the game by removing each fuse for the displays. coin door. These playfield mounted transistors added another These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. 58 volts to power the 2 volt LED. very dim. activates the coil, the Z6 or Z7 chip is bad. This build uses resources from the VP9 version of Spirit with a lot of modification to sit right in VP10. Here we all thought the board was checking itself for problems, like the Bally/Stern delay loop in the code. The original Gottlieb System1 Game PROM is a bipolor PROM with a hardware. After removing the damaged components, If getting zero or no reading for a test, that transistor is bad. But instead of using diagnostic test #13 or starting a game, off the top and bottom edges of the power supply board (respectively) also need to Some Gottliebs also used the more robust 2n6043 (essentially too. will ruin the power supply board, make the bottom board small transformer turn two slam switches and the outhole switch. that carry 5 volts. probably bad. So once the solenoid buffer chips are tested, we These are all unregulated voltages. On the newer sound board, (See the two pictures below.). and the second pin number goes to the board connector. For this can only be two under-the-playfield mounted driver transistors. board's spider chip to the 74175 driver board chip.

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