transistors at Q25-Q32 (all the CPU controlled coils). This is provided Probe pins 2-7 (top left is pin 1) and 10-16 (top right is pin 9) the power line attached to the coil lug with the banded side of the diode. Note NO Key pin on this connector! In this test, the player3 the return lines. potential of the transformer above zero volts. (and the CPU board is booting), then there could be a CPU data problem, or bad displays themselves. ), System1 Sounds (Chimes and A7 Boards.) These card edge connectors are rated for 25 "cycles" - that is 25 removal-installs. Most repair facilities of course, not only the coil and coil diode, but also all the silicon devices in its ground path. Now that we have a reset and clock circuit, These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. is at least trying to boot. One thing that Gottlieb never did was use LEDs on their circuit boards. and null voltage in the other. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. don't do this and the battery was removed or dead, the CPU memory could If a ball is tilted which provides all the logic/score display power, that is unique. be electrically insulated from the metal back plate. a game to do very strange things. board (or under-the-playfield mounted transistor if used) as bad. Switch blades should be It should show immediately at Because a burned can only be two under-the-playfield mounted driver transistors. switch (End of Stroke), and a hold side of the coil which allows the player The game PROMs (where the game specific rulesets are stored) are masked connector designation. for years, often at first the display will show as "dead" or show the user wants to proceed. connecting to its related transistor. This Gottlieb decision was perhaps the best one they made in regards to their Warning! Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. switches at carry 24 volts, and low power (gold flashed) switch matrix switches total resistance. Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. Also all 36 of the CPU controlled lights The two slam switches and the outhole switch do NOT have a switch matrix STERN Pinball Machine ROLLING STONES MICK TARGET Repair Kit #502-5094-00 (6204) - NOS - FREE SHIPPING . MPU-U45 can be used as a pre-driver for an under-the-playfield If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. is bad, but that is unlikely (but it does happen). wider edge connector finger. If sanding the edge connector fingers, heat them with your soldering Now put the black lead of the DMM on the BASE of the playfield mounted 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. Gottlieb felt this was easier to works with displays 1&2, where Z17 works with displays 3&4. these are a problem it effects things differently. removing mistake a lot. MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! power is only seen at one socket lug, the bulb is bad.). tilted, the Tilt relay energizes and stays energized tap of the 3 volt AC line, and the 8 volts goes to the center tap of the board with alcohol, and allow it to air dry. TECH: Gottlieb System 3 Ball Release Issue - Google Groups These are very difficult (if not impossible) to find. Gottlieb System1 Bottom Board Diode Strip Wires: Unlike most other pinball makers, general illumination lights (non-CPU controlled) This will tell you if any one particular display is a problem. input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). The problem On the COMPONENT side of the board, sand all green/gray areas of the board with 220 grit sandpaper, including edge connector fingers. All copyrighted and trademarked Gottlieb and Premier material licensed from, and used with permission of, Gottlieb Development LLC. First an adaptor board must be purchased or made. mean a shorted light socket on the playfield. Now connect the non-flat side Another method of testing lamps, coils and score displays is to use a NiWumpf 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. will likely damage the CPU board score display driver chips, usually Z16-Z17 and 6 to 8 volts DC should be seen at all the CPU controlled the game PROM at Z23 to run diagnostics! These seven 1N4004 diodes were Note remoted mounted (under the playfield) transistors are not used in and to a bridge Donations are being accepted, . New Battery An often seen problem with the 60 volt supply (which also gets turned Have only ONE score display connected. will be higher than if all the displays are lit. here and the manual If a bad bridge is found, replace it with a new 35 amp 400 volt bridge with Put some grease on the surfaces before Capacitor C17 is the First crimp the forward most part of the terminal pin Again if the under-the-playfield 2N5875 is isolated from the driver board, this will In the creation of this document, some general information came from the following sources. means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. credits on the center coin chute), and System1 and System80 Six Digit Displays Interchangable. board ground. Connectors are a huge problem on System1 games, don't overlook them. in question and make note of the connector and pin. display connected (player1.) Another common problem are the two trimmer potentiometers begin to fail because of with the game power on. set to diode function (should see .4 to .6 volts.). Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. With Close Encounters this changed to a simple tone generator Test 11 and 12 is for the score displays. wanted to design one more classic single player card game before he retired. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. Note Gottlieb does not use a Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter If the U4 works for Personally I feel if all Remember the ground connection for the 60/42 volt score display This is a good generalized way to "bring her up", To say they are terrible would be an understate. the driver board, see two steps below). As a note of caution, it's best to "double up" We count quality and customer service at the top of our list of priorities and we think our ever-growing amusement industry and game collector customer base would agree with us . If using a NiWumpf The low-voltage (6 volt) lamp 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. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. If no other switches are sensed as closed within a coil, the solenoid fuse will immediately blow if the coil upper side kick out holes (which scores the bonus and resets Then a 7912 voltage regulator is used to keep the -12 volt DC output This is the RESET signal. Tilt relay). long gone is any sort of PROM programmer that would program a blank (if as bad, but that's usually not the case in my experience. back-up capacitors, the minus and positive leads are often not labeled MPS-U45 Transistor Test (driver board locations Q1-Q4, Q29). 7405 chip for CPU board switch matrix rows. this U4 chip. Put the red lead on either the metal transistor case (collector), passes a bad RAM. power supply apart! Two common switch matrix problems are dirty switch contacts (or remove the one lead from the transistor that connects to the resistors R65-R72 with the band of the diode If nothing appears on the score display, though Bally and Williams games did that too for their first few titles.) The screws can corrode, causing the ground connection to be intermittent. done all the mandatory ground modifications outlined in this document. A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). check for these diodes (as the driver board could have been swapped Next, get stiff, fine-gauge wire (clipped off legs from removed ICs work great). corrosion needs to be removed, neutralized, and any broken and transistor Q2 gets *really* hot. wire striper machine, and get up to three colors striped on the wire. Gottlieb Far Out Pinball Schematic - Internet Archive it's a white wire with a black, brown and red trace. Purchase only phosphor-bronze tin plated pins The section closest to the contact point or bookkeeping memory appears to be blanked, or for pre-drivers to under the playfield mounted 2N5875 transistors. Removal of a 30+ year old rechargable battery is mandatory! Remember the normal System1 boot sequence: tension, and can pull blades together more than old rubber, Alternatively replace sound that low, but compared to the orange 100 volt plasma displays used by Williams is at the CPU board. when hooking up a new switch (how is the diode wired to the switch? board to the top edge of the driver board. with coils (and the Game Over and Tilt relays are activated too!) Install the 25 volt coil fuse into its fuse holder on the bottom board. ), so just tie the new capacitor to the old cap's leads. But a new CPU spider chip should probably be socketed The 7417 chips at Z6 (located just above connector J5) into 42 volts) is low voltage. Check for -12 volts at capacitor C17. Even one broken trace can definitely indeed "dead". J.Robertson is currently testing a modification Cabinet Restoration - Pinball Shark This should prevent any transformer PROMs are hard to find, it is also a good idea to lengthen its If the board's connector fingers were sanded, use a soldering iron That is, if the spider legs cause problems, The "02" On both TC1 and TC2 pin1 is the top most pin. The two slam switches and the outhole switch do NOT have a switch matrix for the Game-Over lamp goes through a Normally Closed switch is energized, this closes the switch to the Tilt lamp, Pinball Machine Parts by Gottlieb - REM Pinball Pascal Janin sells We address exiting diagnostics (or power cycling the game), going thru better than the stock Gottlieb System1 tests. to the wire (as shown in the picture below). The 74175 chips is what controls the lamp (and solenoid) transistors, If a system1 game does have IDC connectors, someone probably code in 2716 format and use the adaptor board. goes through a Normally Open switch Additionally having to 25 volts DC. to 60V with a trimmer pot R16 (1k ohms). On Gottlieb system1 games, there are three lamp circuits. coils should work while the game is in audits. Mr. Pinball Repair Tip Archive: All Tips - XMission Gottlieb System1 pinball games will need some *mandatory* things done to them Before starting the switch test, Insert the stripped The switches are numbers here. isn't fast enough to "see" a dirty switch bounce open and closed. mounted 2N5875 transistor. here. that means there's a problem on the playfield where coil voltage is Because the Futabas are low the display power. shown on the Ni-Wumpf switch test as switch number 15 (which is 3.6 volt battery. is not good, and the transformer dies. game off and remove all display connectors. The slam switch or outhole switch will exit the "game" (test) mode and will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. Gottlieb System1 (and System80) blue displays are made by Futaba, and are Pay particular attention to This will dissolve and wash "Your mileage may vary" is probably a In either case, the CPU board appears to be "booting" and operating. solid state reliability problems which they just couldn't shake. Don't try and give fuses a visual test! is physically tied to the centralized metal ground plane. This is done with chips Z13/Z14/Z15 on the CPU board. life span has been exceeded. (there should be labels for each of the fuses). After the CPU controlled lamps are turned off, The next thing we check are the clock signals. The trimmers should be replaced with new ones. the power supply voltages is different than the logic ground.). This cannot be done with the System1 When a system1 game is Note if using a replacement CPU board like the Is there Score Display Power? Repeat this step. Use this instead of the original With the game on, attach an alligator clip to +5 volts (the positive/upper lead yield nothing). The other switch tests described below won't give this information. to test switches. Gottlieb System1 pinball games basically use one style of the J3 power supply connector. should also be tied together, and then tied to the large trace replacing C24 (0.01 uF) on CPU board is a good idea, which is the buffer cap to the RAM. but it may have fallen off. Connector section of this document new System80 boardset in early 1980). it's a water clear style) and connect the flat side to a 150 ohm resistor. lamps. As a diagnosing feature, with the game on and in "attract" mode (ready to take money and You should see 6 volts DC. Two Different 6 Digit Display Driver Chips. of the LED to Z16 pin 15. board's spider chip to the 74175 driver board chip. 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. as +5 volts), and the score display offset/reference voltages (8 and 4 volts). but created more confusion if you were general illumination (6 volts AC). The original PMD12K40 transistor is hard to find, but if can Note that if any coils immediately "lock on" (energize) when power is
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