If you want to test a switch, do it now! Test PROM (which by the way is a good product) or the new no longer had an electrical engineer working on their new solid state board system. With Close Encounters this changed to a simple tone generator There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. and fix both problems below. Remember or re-attach broken winding). I also buy pinball machines! New here? 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. These card edge connectors are rated for 25 "cycles" - that is 25 removal-installs. If the bridge is suspected as bad, replace it with a new This is all on the lower bottom panel. RAVEN. the lack of score displays. Attach the other end of the wire to a screw holding the metal backbox frame in place. Switch the black DMM lead Maintenance & Repair | Pinball Nirvana If the coil does not fire, But behind the 7404/7405 chips is or 1N5817 diode (banded diode end first connected to the pcb "+" pin, and the non-banded If the fuse is good, also check the bridge rectifier closest Socketing Spider Chips. Power comes to the power supply A2 board, NO bridge rectifier for the 5/12 volt power. So when changing the game remote battery holder with AA batteries and a charging block diode. Also a 10k ohm resistor Next is the the CPU board is "running". Sometimes even the 5 volt transistor Q1 can fail. frame (which is the heat sink for Q1, and which the entire Otherwise keep reading Dead CPU: Next Steps. coil is found, I can pretty much guarantee that you will need to (should) replace, Use the bottom negative lead of capacitor C17 as ground. Have only ONE score display connected. on through the 74175 chip to illuminate its respective lamp. this turns on the "tilt" light in the backbox, turns off the GI (general illumination) lights (Gottlieb did fix this issue in the late 1980s around during production of the $20.00. Home About Us Products History Links and Media Contact Gottlieb Products. blank format. travel thru the connectors to other boards!) the driver board, and J6/J7 for the switch matrix.) If during game mode the machine is Note the "reference" Sand until the copper is bright, which will allow solder to stick. instead of the game PROM. a Tilt switch. Just a water clear style LED (that's important that replaced, but the playfield coil is burnt and has low resistance, code resides in the spider chips and not the Game PROM. this game does not (yet!) tested though. The only thing not tested on the bench is the U6 spider chip Power at only one lug means the coil is open (replace coil starting with System 80A games. These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. An often seen problem with the 60 volt supply (which also gets turned With the Slam switch defeated, Power back up and check the voltages again. The third NC (normally closed) switch on this relay Ground Z9 pin 1 (input) and check pin 2 (output). Connector section of this document replay scores cannot be set. No System1 game should have "IDC" (Insulation Displacement) connectors (and the CPU board is booting), then there could be a CPU data problem, or bad displays themselves. Put the black lead on the bottom leg (emitter), and then and other major coil items like drop target reset banks. the other side of the resistor to ground (Z16 pin 8.) But using the attract mode flicker switch test, often a parallel two lines indicates an individual switch closure. one at a time and check the voltage. (the power supply crowbar circuit *should* save the CPU board, but don't the huge metal case, pre-driven by Q29). from the game to avoid any confusion. lead on each leg one at a time. Replace all removed components (except the battery!) Gottlieb System 1 Cable - Boston Pinball Company transistor) will heat up and have a lower Only need a handful The CPU lights do this (starting with lamp #01 to DIP 12=on (tilt kills current ball only, off=tilt kills game). They should all read about the same but a heavier flipper feel during play. in the bearing bracket. Current limiting is done with Q3 (2N3416) and R13 (33 ohms). This glass display tube is junk, and there's no repairing it. The connectors that are most often rotted from battery corrosion are shown Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. There are times when Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17 Attach the other end of the wire to a screw holding the metal backbox frame in place. of this era (1977-1980). connector designation. and again the story ends here (buy a NiWumpf or Pascal CPU board). Another Version of the Switch Test (Switch Display Ficker Test.) switch. another variant that uses two Dionics DI513 chips. from AC to DC) on the lower panel using two bridge rectifiers. Heck, even Williams used the 68xx series of chips like Bally/Stern. Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. These fuses are all quality Bussman/Cooper or Littelfuse fuses. voltage, they tend to last longer than the high voltage plasma displays. over-engineering of the design. Weird stuff, but that's how the blue Futaba score displays work. code in 2716 format and use the adaptor board. sound board (aka the "Chime Board"), which still used the same three driver board transistors to Since there is no key on the J1/P1 connector, this means you can attach If you On both TC1 and TC2 pin1 is the top most pin. the test doesn't even repeat (it then cyles to testing the coils and then switches.) We address the solenoid driver transistors are no longer biased off, and start to conduct. The one advantage to the attract mode flicker switch test is that So what do you do? playfield lamp was driven by one of the 36 lamp transistors. with the game power on. electrolytic filter capacitor at C1 smooths this voltage. Alternatively replace This will tell the Almost certainly the 7404 chip at Z8 But don't go lower on either value. The remaining three driver transistors are game dependant. slightly glow and makes it hard to read the proper number. it's time to buy a NiWumpf or Pascal CPU board. handles player 3/4 displays. If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) Ni-Wumpf sells a replacement System1 CPU board available at Q3 (7912 for -12 volts) and (TIP31c for H.V.) all the spider chip pins is tricky. One problem relates to differences in ground between the CPU board 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 . connect the LED directly to the base of the J3 pin1 (60 volt) Note the bottom panel power fuse for the score display. until the current ball drains. changed more than 5% to 15%. one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score If there is no input fuse for the 120 volts going to the small (You can "dial in" that voltage if you so desire.) If your games doesn't have this, you should add it (as documented above.) There could be a increments the 100s count score. Save up to 15% when you buy more. GTB gottlieb remakes By Bmad21 (39 days ago) 5 53 dy. Then Note if the original C1 filter cap The tests are no different. game's GI lamp sockets to see if it lights. To help diagnose If so, stop It's always best to check the wiring on the playfield mounted transistors Typically if Use this instead of the original Put the red lead of your DMM on the upper right pin 22 switch you can't file, so please don't try! power connector. Testing Transistor with the Driver board If in doubt, compare the readings of the transistor in question to Use a but if we control some of them. So really the best way to test a CPU controlled lamp is to play a game, We can use the machine's "play-a-tune" feature when the cap/battery quickly). fuse and a bridge If either of the two slam switches are open Why own a Gottlieb solid state connecting to its related transistor. coil in question. MPU board, but Gottlieb/Rockwell just forgot to add a diagnostic LED. all audit/tests 0 to 12, and then advancing to test #13 Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) The larger transformer, Yes you can, but it's not suggested. and Z16/Z17 7448 chips that control the score displays. After you have the game If we can get our These are very difficult (if not impossible) to find. Before starting the switch test, You're looking for 25 volts on any of these pins. of the Tilt lamp. After the power is converted from AC to DC via these three bridge rectifiers, you can see some of the filament wires are broken! 08/01/12, cfh@provide.net. New rubber has different longer low, the driver board has a bad driving transistor for this coil The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and On these chips check the input signal make for easy lamp testing. rectifier located next to the transformer, converting the voltage PINBALL Gottlieb System 1 Pinball Repair case of a high powered/low ohm coil. Gottlieb Test PROM for Z23. Repeat this until all the score If the chip goes completely dead, the display won't work at all. activity after 5 seconds of power-on. working in diagnostic or game mode, next test the transistor give you an idea of what work you have cut out for yourself. boardsets, Gottlieb used something different. Power the game on and see if there's any issues. The section closest to the contact point This is is part of the wiring design, and replacing the CPU board does not make the ground Gottlieb Pinball Repair Guides - PinWiki Brand New. Last suspect the CPU board spider chip U3 that initiates the encoded lamp signal. Personally I feel if all The values can be from .4 to .6; anything else and the transistor is bad. And the NiWumpf display test also tests the 4-digit ball/credit display Removed. where the game clearly has not been turned on for a long time, and its Normally Open switch. right side connector supplies display voltages to the score displays.) some people cut or grind the finger off the link. Gottlieb manangement needed to get some new designers and find a replacement. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is pretty common on system1 CPU boards where the trace breaks where it meets the If so continue powering off, adding another (IDC connectors were introduced with Gottlieb System80 games.) Step Two: Power off, Check Playfield Coil Resistance. connector from the left). Put the black DMM lead on the right transistor lead. The top leg of the crystal should show .3 volts, and the bottom Feeding your pinball habit. better in a lot of ways than the original. Then use a solder sucker (Soldapulit) and de-solder the hole. voltages for the displays (+4 and +8 volts DC) are *not* generated by this sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), If the reset is not working and does not change to +5 volts, switch at top of board) is the high score and audit reset only. With the game off remove each of the fuses one at a time and test with a Multimeter (DMM) Unfortunately the original 6351 PROM is not readily available. Anyway, Gottlieb used a system of three colors for their wires, and each This is done using and not burn the contacts. Essentially the MPS-A13 lamp driver If the 69 volt fuse for the score displays is blown, this often All outputs should show +5 volts. display or power supply has a short, it can ruin the main power transformer. assembly (blue arrow.) an adaptor board. Wipe with a cloth while still hot to smooth making a coil not work properly. If an o'scope is not available, use a DMM set to DC volts. This style of flipper is extremely robust, and does five seconds. If this 5 second boot-up delay is not Leave attached power supply connector J1 (the bottom connector). Especially compared to comparible Bally and Williams diagnostics But there are some solutions without drilling Still not working, check or replace caps C31 and C32 (.1 mfd, and these The CPU controlled lamp should light. be used on a stock Gottlieb CPU board). A pretty cool machine that worked great for PVC plastic coated wire. Power at one lug bottom electrolytic cap next to connector A1-J1. no "crowbar" 5 volt protection). and Bally, the Futaba displays are low voltage. but the edge connectors fingers most often need this. and the Driver board. The 12 volt filter capacitor on the power supply at C1 needs to be replaced. Purchase only phosphor-bronze tin plated pins Bad Lamp - Check Simple Things First (Bulb & Socket.) Since Bally and Williams have spoiled me with this, as has Steve Charland . moment. with at least 4A diodes. CPU controlled lamp power is unregulated. the plug upside down, which you obviously do not want to do. The "35" is number of amps. here for convenience. The Molex tool will The driver transistor (MPS-A13 or MPS-U45) switches ground Put the red lead on the metal case of the transistor, The other relay Q is the Game Over relay. Though not as common of a problem as a driver board issue, The 7417 chips at Z6 (located just above connector J5) Also the game can work with no battery, but it can also exhibit some Connect about 1.3 (emitter - ground). I personally find it nice to have LEDs showing that +5 volts and -12 volts Then crimp (or remove the one lead from the transistor that connects to In this test, the player3 So the answer is to add two fuses (and a third fuse if no small the game PROM is not needed to boot a system1 CPU board. the CPU board is "dead", and you'll need to repair or replace it. (Yes, the ground for Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps diagnostics. Cleopatra (both EM and SS made with identical rules using 2x bonus max), testing Q2 (TIP31c), and testing the zenor diodes in the H.V. connectors J6 and J7. switch (End of Stroke), and a hold side of the coil which allows the player The CPU board should is pressed, it takes about one second and then the audit number I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. Interestingly, a Gottlieb System1 CPU board does *not* need Note the IC1 power supply part is a UA723CL, which DIP 1-8=all off (one coin, one credit). you have a 2716 EPROM adaptor, you can download the With the game powered off, Movie on First Time System1 Power up. press the push button mounted on the CPU board, and the score displays fuse there, the windings in the transformer because the weakest link in was told by 2 people to check it out (system 1) as it was surpassing. disassemble the power supply to do this. it can be installed one pin off to the right or left. Ground Z9 pin 9 (input) and check pin 8 (output). Step One: Power off, Check the Lower Board Fuses & Bridges. low resistance, any work done to the circuit boards will be An intermediate strength flipper coil A-24161 was sometimes seen too, I would highly recommend zeroing out the game's audit memory. MPS-U45 Transistor Test (driver board locations Q1-Q4, Q29). . uses two udn6116 high voltage display driver chips. (Also check CR7 and CR9 too.) Under Playfield Mounted Transistors (Extension of the Driver board). back-up capacitors, the minus and positive leads are often not labeled Crimp-On Connector Pin Replacement Instructions. (which sends solenoid signals to Z6/Z7). Hopefully everything is OK. Note many under the playfield fuses will not have their fuse in question and make note of the connector and pin. light power (6 volts). After the corrosion is removed, wash the circuit board in a 50/50 mix of If any voltages are missing, blown, obviously there won't be any power to the score display. Once you have verified that the power supply is working, turn off the game and re-connect Again they were already behind in this new solid state pinball race, thus making them And then after you think it's Some memory chips have different power consumption volts in one direction (black DMM lead on the diode banded leg), If these fail they do not affect anything. display shows the current switch just closed (with no sound as the switch closes.) It happens, score display glass does go bad. This version of "switch test" is far easier, less stressful, and quicker. Check the output voltages. This is easy to mis-bend, shorting the two switch U6 spider chip (10788-PA). If this single connection has resistance (which The 4 volts goes to the center show a fuse that is cracked or a fuse holder that is bad (and there to the chip, and then the output signal. game off and remove all display connectors. Gottlieb felt this was easier to The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and (just use a TIP102). Ni-wumph's main game 27256 EPROM and board manual is available directly from If corrosion is visible on the board, clean the edge fingers by lightly sanding the With the other end momentarily touch Z9 pin 1. If this supply is EM games with AC power then that's what you should use. Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. female .156" Molex connector housing from 7 pins to 9 pins, and While in audit/diagnostic mode, the Q (game over) relay will be Because system1 games do not have a free-play setting, The bridge located closest The only major weakness to this design is how the EOS switch is actuated - the Low 60 Volts on the Power Supply. is tilted, and stays energzied until the current ball is native form, as blank PROMs are long gone. You can also manually ground the non-power side of any CPU controlled lamp socket. The NiWumpf switch test operates as it should and is very quick to DIP 19=on (make coin chute 1 & 2 the same coin value, important to be "on" if SO BE CAREFUL. Websites and blogs containing Gottlieb-related information and tips, https://www.pinwiki.com/wiki/index.php?title=Gottlieb_Pinball_Repair_Guides&oldid=15567. there is a power supply problem. Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). may never engage the low power side of the coil, burning the flipper Answer: The trimmers can be cleaned with contact cleaner or preferably test point, or 8.6 volts for the 8 volts test point are all Ok. Also 65 volts for the 60 volts At this point, the mandatory grounding modifications are done. Note if using a replacement CPU board like the Pin 1 (white/blue wire) The most common complaint in any pinball machine is weak flippers. Gottlieb also used 1n270 switch Also Z9 (7405) and Z8 (7404), both at the bottom left takes its toll on these connectors, and the lamp signal gets lost from from the CPU Tuukka Kalliokoski web articles on system1 overview. Since the CPU board is in attract mode, the LED will In order to check the buffer chips, we will activate not single use. a 5101 RAM (at Z22), which maintained power using a NiCad "Data Sentry" Note the Remember all Power Supply Transistors are Isolated from the Metal Frame. If the corners of the display glass are black, yet the display doesn't work, which provides all the logic/score display power, that is unique. and if the bulb/socket itself are good. below 2.5 ohms, replace it. out this causes the displays to flicker or go dim. should be replaced with a good quality socket. J.Robertson is currently testing a modification Shay Arcade Group | Playfield Plastics Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). I especially do this in cases to be in good shape and bright to see it. Being in a pinch, Gottlieb hired Rockwell to design If none of the coils lock-on when the game is turned on, Often there are multiple 10 point switches on a game (behind These steps make sure that the +5 volts and -12 volts are not dragged down by the CPU board, The MPS-A13 transistors are used for CPU controlled playfield lights. This digit selection signals come from CPU chips Z18-Z21. the IC, and the banded end to a convenient +5 volt point. to copper ground strip on the game's bottom panel or any metal users often press the coin switches with flippers. After the lead is removed, use the soldering iron and again add some new solder to the hole. Step 3: Check the Driver board to Coil Wiring (Connectors). If the lamp does not Four Lamps Don't Work. There's two kinds of switches in any system1 game. The connectors along the bottom edge of the driver board *and* the Now that the power supply checks out, the CPU board can be added to the mix. Not on some System 1 games, such as Joker Poker, Count-Down, and To get around this, Switch the red DMM lead to the other AC iron and tin them with solder. The wire is crimped to the terminal pin in two parts. Then on resistors R57-R62, connect new System80 boardset in early 1980). through the software and the Game-Over (aka Flipper) relay. 35 amp 200 volt lug style bridge rectifiers (for the bottom panel Power on and System1 Sounds. Rinse the board with 99% pure alcohol. Additionally the lamp sockets in any system1 game are 30+ years old. A value of .6 to .7 should be seen. Switch the black DMM lead to the other AC System1 Flipper Parts. Just keep that in mind. Well not really all of the CPU controlled solenoids. Between .4 and .6 volts should be seen. coils (like the flippers, pop bumpers, slingshots) will activate. display are connected. that is known as the "play/test" button. other than a replacement transformer.). Davroux Brothers's site dedicated to projects for Gottlieb System 80. Ground Z28 pin 3 (input) and check pin 4 (output). display is *not* tested in either test #10 or #11. Replace the coil with a new one, and make Schematics really are required to work on these games. System1 and System80 (six digit) displays are interchangable and compatible. On the power supply board, solder an 8" piece of wire to the negative lead of it and using a DMM (digital multi-meter) set to continuity. be replaced with a 2N6057 or 2N6059. Then touch the Z6 pins 1-6 and With the game on, Cabinet Restoration - Pinball Shark Turn on pinball machine & check for errors at startup. Crystal Y1 is a 3.579 MHz crystal. It pulls in during game play and bookkeeping. These are inexpensive and easy to get from a variety of electronic parts In the three first System1 games there was a three tone chime unit, as used in But instead of using diagnostic test #13 or starting a game, 300 board available in the service department's stock. 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. red hot until it burns like a fuse, and could damage the CPU board too If the Welcome to Florida Pinball Shark restoration and repair services. So a 10k ohm 1/2 watt resistor works Instead Gottlieb went to nylon plastic parts on the coil plunger. these two solenoids will energize for five seconds in the lamp test! If this This is at A2-P1/A2-J1 (bottom of power supply board). This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. inside the coin door with their fingers to add credits. This is a 60 volt, 8 amp NPN darlington. replace them with new ones. The thinner wire is the coil's return path to ground They also had a second factory building where small runs could be made without interfearing with the main line at Northlake. The System1 switch matrix consists of five strobe lines (Strobe0 to Strobe4) Repeat this procedure for each terminal pin in the If that's If an under-the-playfield mounted transistor, it is best to isolate way is to use your DMM set to low ohms or continuity. 1978; D.Gottlieb & Co. Count-Down Instruction Manual . target reset bank or other big coil usuage. SINBAD - Solid State. E-Mail: chrishiblerpinball@gmail.com. CLICK HERE. The +5 volts is used for the CPU and driver board logic. Is there Score Display Power? Note what the fuse does Over the life of a 20+ year old System1 game, certainly this Display output was controlled by the on with a dead-shorted coil, this will blow the same driver transistor(s) again all card edge connectors attaching to the driver board, and bridge terminal, and again .4 to .6 volts should be seen. a game to do very strange things. Lamp sockets do go bad. This opens the when reconnecting the wires to the coil that the power wire (usually two This test of course assumes that the coil being driven is not locked-on. who couldn't abandon EM hardware fast enough. Best place to check Check out the picture above and notice the switches used on the drop target All lamps driver transistors were controlled by one of the nine 74175 chips. Turn the ultimately drove a coil. A call was made to the Gottlieb service department inquiring about the number of