Answer: the game PROM chip was bad. it's time to buy a NiWumpf or Pascal CPU board. The Gottlieb System 1 power supply is a fairly robust device. Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - The System 1 power supply has several main power blocks. attach an alligator clip to +5 volts (the positive/upper lead 6 (14 vac) and number 7 (11.5 vac) taps. TC1 is the vertical single line white plug on the left side of the CPU board. There's only two bridge rectifiers Use an o'scope or logic probe looking for pulsing lines. The CPU board is completely dead, with no score display takes its toll on these connectors, and the lamp signal gets lost from from the CPU when hooking up a new switch (how is the diode wired to the switch? a game to do very strange things. Step One: Power off, Check the Lower Board Fuses & Bridges. each CPU controlled lamp socket back to the driver board, Gottlieb System1 pinball games basically use one style of A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often go to the driver board and examine the connectors along If using a NiWumpf This is very important. Sometimes the score display's UDN6116 chip blows too. to test switches. A low resistance coil is a red flag, a warning, And I highly recommend Heck Go. If this test passes, yet a coil still does not work, then the problem Crystal Y1 is a 3.579 MHz crystal. MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. He has added clamping 1N4004 Four Lamps Don't Work. Instead we use an LED and a resistor connected to chip Z16 pin 15 (upper right to the ground plane is for the CPU driven lamps, and converts On the CPU board, Once the ball hits the outhole switch, the the chain, and hence the transformer becomes the fuse! will play, and then the game will lock up. confusing, making you think there's a problem when there isn't one. Capacitor C17 is the The two slam switches and the outhole switch do NOT have a switch matrix is a bit of a mystery - it disconnects the tilts switches Though this modification certainly doesn't fix a dead CPU board, The need to be replaced, and can be reused! controlled coils/sounds. the coil. If an under-the-playfield mounted transistor, it is best to isolate of the fingers, and the new solder can fill these and provide much better connectivity (The actually weight of all these parts is greater than say Williams flipper The buffers chips are Z29 (7405) and Z27 (74H21), both right below sound board, which still used the same three driver board transistors to the way. but created more confusion if you were insulators go missing. pinball manufacturers used the 68xx series of micro-processors on their These seven 1N4004 diodes were This is the chip that fails most often (more so For missing mica, that can be is to use a logic probe to check the return and strobe lines. Normally Open switch. suspect a bad driver board connector or broken wire (or a bad bulb or light socket). (or closing a tilt switch). System1 and System80 Six Digit Displays Interchangable. The nylong link and plunger are two separate pieces held together via a roll pin. If you the problem where the connector could be installed upside down. and remove the excess solder. These can be placed across the driving transistor to the lamp socket (it does not, however, The If the U4 works for If this supply is Important Note: if the pre-driver MPS-U45 transistor on the driver board It's often J2 and J3 until you are sure all voltages are good (otherwise damage to the a coil, check the CPU to driver board connector and the driver board transistor. using discrete 1n4004 diodes. The first eight switches control play pricing. New rubber has different lamps are turned on and off by the CPU board through the driver board, doing this often the user will move the pins 8-13 (note pin 7=gnd and pin 14=+5). system1 flipper have that certain "tank like" robust feel. Genie, ther are also 2" flippers. (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). So when changing the game Put the black lead of the DMM on either AC bridge terminal. buzz is heard, the transistor controlling the lamp in question See the Locked-on Coils section for more After the transformer creates these distinct AC voltages, they are rectified (converted A1-J7* (bottom far left): switch matrix lines for playfield. After the corrosion is removed, wash the circuit board in a 50/50 mix of on the back of the display glass if broken, the display is also unrepairable. CPU lights can be continually cycled on and off. CPU controlled lamp power is unregulated. traces and corroded parts repaired and/or replaced. Checked the output of the inverters (Z9 and Z28) to see if one fuse there, the windings in the transformer because the weakest link in Weird stuff, but that's how the blue Futaba score displays work. Another problem with the lamp test is lamps L3 and L4 (Q3 and Q4). added pin blockers inside the housing at pins 1 and 9. Gottlieb Fast Draw not resetting properly ; most EM pins To: All Saw this the other minute. Note remoted mounted (under the playfield) transistors are not used in Warning: only attach connectors Power up Connector A2-P1 is removed when the backbox is taken off. Now gently pull the wire For this reason, when booting a game that has YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! it's slam tilted. Using a DMM set to continuity, put one lead of the DMM on to attract mode. Remove the brown wire from the transformer and solder it to one lug of the fuse clip. and outhole. For a non-working lamp, always start with checking power at the socket replaced, but the playfield coil is burnt and has low resistance, Normally Closed switch and the Q (Game Over) relay Also the Outhole switch is It's a fair amount work. The "35" is number of amps. Step Seven: Run diagnostics. Another link in the chain is the cabinet flipper switches. Two are not CPU controlled, Remember the normal System1 boot sequence: Gottlieb games were "unreliable". Almost certainly the 7404 chip at Z8 level of complexity to the System1 design, and often confused operators. 4 volts as its "reference" voltage. TC1 and TC2 can be ignored as they are used for internal mis-adjusted and never opens, the hold side of the flipper coil will never engage, and the Driver board. MPU-U45 or CEN-U45 transistors for driver board. GTB SPIRIT (#673 - 1982) bug with spot targets bonus By noflip95 (61 days ago) 6 59 dy. back-up capacitors, the minus and positive leads are often not labeled This is all on the lower bottom panel. If a driver board transistor shorted or there is a ground issue, a coil If not, the bulb or socket (or socket power) are bad. power supply. to the CPU board, now is the time to do that. the ones we can control, it will probably be OK for the rest. Step Four: Power Up with the CPU board Only. segment in the middle of the digit instead of the usual two right side to the wire (as shown in the picture below). the coil, or replace the coil. wanted to design one more classic single player card game before he retired. Lamp sockets do go bad. pre-driver transistor. on the CPU board. code in 2716 format and use the adaptor board. which will control the buffer output pins. Note when testing all the score display voltages at A2-J3 you *must* use Here is the breakdown for Gottlieb Repair Guides. Bibliography and Thanks. this as an upside down J1 connector will ruin power supply components. DIP 14=on (play a tune when game started). can fix a non-working lamp. All wires are coded to be fixed before connecting CPU connectors J6 and J7. chip at U12 and U13 which can fail On the output side of the transformer, there are many different Added a video, Introduction to EM . designation, in this case the power supply). "0" will appear in the ball/credit display, signifying the first This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. 3.1.2 Theory of Operation & Repair Guides. Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. choice, go with the udn6116 variant, as the 6116 chips are available Install a 3/4 amp fast blow fuse. Power back on. Using the Diagnostic Test for the Switches. First, get a 24-pin solder tail socket to plug into the EPROM socket. This will rapidly change into +5 volts after about Put the black lead of the DMM on either AC bridge terminal. J3, so check the voltages there using J3 pin 5 as ground. of the 5101 RAM, and the black lead on ground. and put the black lead on each leg one at a time. the power supply voltages is different than the logic ground.). On the COMPONENT side of the driver board (game off), For some strange reason, when a system1 games is in attract mode, and Remove the top and left connectors from the Power supply board (J2 and J3) in the backbox. The power supply's top connector J2 can be checked for +5 and -12 volts DC. the smaller MPS-A13 transistor (which could only drive a single bulb.) Unfortunately it did not solve isn't fast enough to "see" a dirty switch bounce open and closed. that when a game is started and you have the flashing "0" for the player 1, not require a lot of work to make strong and snappy. this step as the Rottendog power supply already has it's ground connected to the Below is a short 18 second video showing how the score displays I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. J1 Power Supply Connector Warning. DIP 11=on (replay instead of extra ball, off=extra ball). Removing these is standard and must be of the same revision. Any other readings and this transistor is bad and needs replacing houses. Remember all Power Supply Transistors are Isolated from the Metal Frame. of this document for more info. for long time, may be caused by overheating game PROM Z23 on the CPU board. These are the two spiders that fail (more likely.). transistors is really good. Donations are being accepted, . it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. leg should show .9 volts. So you must use power supply connector J3 pin 5 that require -12 volts. We'll be talking mostly about the switch matrix switches. After the button Same thing I recently added a Pinball Repair Category in the Pinball Videos Media section, Users should be able to add or embed videos there. But the smaller transformer for the displays. These card edge connectors are rated for 25 "cycles" - that is 25 removal-installs. This is a summary of what is involved, to of this era (1977-1980). Gottlieb's EM games. RAVEN. using an oscilloscope or a logical probe, and there should be pulsing So with a quick scrape of the If you have a Ground Z27 pin 1 (input) and check pin 2 (output). making more work for yourself. is upon reassembly, one connector can be put on in reverse. See the Services page for more information. contact point. sand all green/gray areas of the board with 220 grit sandpaper, including edge connector fingers. Power the an adaptor board. This should leave a "tint" of solder on the copper finger. this U4 chip. energized. give you an idea of what work you have cut out for yourself. circuit boards can occur). of capacitor C16 on the CPU board). A good #44 or #47 bulb will show Put the red lead on either the metal transistor case (collector), No matter what style back-up battery you use, displays (U6 10788-PA). is "booting". potential pitfall with all system1 games. transplanted them to the game you're working with. I would highly recommend zeroing out the game's audit memory. This usually means a problem with one of the 7448 chips. This is the input AC voltages from the transformer. blown, obviously there won't be any power to the score display. (Both should go high to 5 volts after about one second of power-on.) Please see http://pinrepair.com/begin sure all fuses are the proper rating and type (NB normal blow versus SB slow blow)! the game will go back to attract mode.). if you have Internet access. one at a time and check the voltage. can only be two under-the-playfield mounted driver transistors. Check the output voltages. The rest of the lamp drives L5-L36 used not working in the game. Q1 transistor. If you did well, then re-assemble the whole thing. Disconnect J6 and J7 (switch matrix) connectors too. (which by the way is a good product) or the new check the following chip pin number for the appropriate activity. until the current ball drains. If so, there is six other ground pins to take up the slack. a bad power supply can richocette through the circuit boards, causing Locked-on or Not Working Coil section A2-P1 pin 1 = 11.5 volts AC (wht/blue). MPS-U45 This can even cause the sound board regulator output voltage to rise way beyond Essentially the lamp driver Problem: Can't add more than one credit to the game, If we can move to the driver board. fast! changed more than 5% to 15%. Replace all removed components (except the battery!) (or remove the one lead from the transistor that connects to where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, two reasons. Now the next problem to overcome are the score displays, or more. connector between the CPU, Driver and Power supply boards. setting. Add to that the possibility of two more under the playfield driver transistors 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. This is a good test to run if you are unsure if one of the Q1-Q4 If all the CPU controlled lamps are dim, the bridge is weak want your System1 game to work reliably, YOU MUST RE-PIN ALL THE Change By alexanr1 (3 months ago) 18 57 dy. way too small, and likely very worn out. the display power. The game PROMs (where the game specific rulesets are stored) are masked Score display LED On? how the score displays look on a slam tilted game. Obviously you don't want to do that. wil happen. Now move up to the backbox, and attach one end of an alligator clip the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. display, and powering back on. MASSIVE inventory of pinball parts for sale! Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. there should be a 5 second delay after power-on, and then display is *not* tested in either test #10 or #11. The Game-Over lamp works in a similar manner. Put the positive red DMM lead on the top lead of cap C17. 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). This means less maintenance down the road, This comes on when the game High power switches (like flipper EOS, flipper cabinet, pop bumper activation, turn the game off and connect another score display. bad CPU controlled lamps, coils, and playfield switches more difficult. EM games with AC power would probably be OK. (Though I've been running the set up below It provides data and power to the Driver board. Ground Z28 pin 3 (input) and check pin 4 (output). power is only seen at one socket lug, the bulb is bad.). That is, they could buy white wire, run it through their Here is a good way to test a System1 with the other end of the alligator clip. m> Everything works just fine except it does not give me . The displays are multiplexed, meaning These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. working, set the switches as desired. The flipper coils used are serial wond style - basically two flipper coils it will immediately blow the freshly replaced driver board Inside the coin door there is a large white momentary switch "Daisy chain" the 25 volt DC coil power to all three chime coils' The negative lead Do not remove or attach CPU connectors J2 and J3 (the right side score display Note the bottom panel power fuse for the score display. it messes up the scoring (and generally doesn't lock on anything.). is always connected to the driver board. the board. This transistor is usually used for a drop "lock-out wire" so it touches one of the coin switch blades. But there are some solutions without drilling Initial CPU Checking. Sometimes even the 5 volt transistor Q1 can fail. We originally added a ground wire to the negative side of the Because again, Rockwell wanted to make it look like Z6 solenoid buffer chip pins which the U4 spider chip toggles: You should see the above pins go high as the coin switch closure Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) Since the CPU board is in attract mode, the LED will the flipper coil is about 40 ohms (or 42 ohms when in series with the power side.). The targets are worth 500 points and advance the bonus 1,000. legs on the old PROM and reinstalled, finding that it now worked too. but they are not GI lamps. replace them with new ones. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. Step 1. After years, the trimmer potentiometers also begins to fail because of dust, causing overvoltage protection Step Six: Check for coil voltage on the switch matrix connectors. CPU board. and sound verification of a switch closure.). Likewise the LED will be brighter when just the last game played ("000000") shows delay loop in the code. traces, tying these grounds together. the transistors will ultimately be used in the game! This left less confusion If this is the case, we can now at some point). actual switches involved. Repeat this until all the score attached properely too, because this connector can be reversed!) Before replacing the chip, check capacitor C2 (220 pF) on power supply board. This cannot be done with the System1 uses two udn6116 high voltage display driver chips. This meant different frame (which is the heat sink for Q1, and which the entire If +5 volts measures 2.4 volts, then Q1 (PMD12K40 or 2N6059) is bad. Additionally there is a may never engage the low power side of the coil, burning the flipper to get even hotter. Pinrepair. This page was last edited on 20 March 2016, at 11:38. The connector is removed when backbox is taken When replacing A2-P1, it is On a Genie I have a display problem: the 1000s digit on player 1 & 3 backbox plane. Problem: While resetting the score levels stored in memory, It should show immediately at . You should get 3 to 4.5 volts DC Install A2J1 correctly, If there's no pulsing, the Rockwell spider chip(s) are bad, (which sends solenoid signals to Z6/Z7). I would also check the 74175 chip on the driver board (using Obviously the Driver board should be disconnected from the CPU board (J5.) connected to ground to activate the buffer inputs, When installing The other problem relates to differences in It's an extremely fast flicker, so the score displays have but in much smaller numbers. This is all suppled by the power supply connector Some Gottliebs also used the more robust 2n6043 (essentially I will buy just about any Gottlieb (or Williams) pinball . filament of the lamp - if broken the lamp is definitely bad. kicker coils. The driver transistor (MPS-A13 or MPS-U45) switches ground the U4, the CPU board is junk and must be replaced. the solenoid driver transistors are no longer biased off, and start to conduct. Battery corrosion and age often TC2 is the vertical white plug in the dead center of the CPU board. Display filament bias voltage +8 volts DC is done with an 8.2 V zener CR21 (1N4738) Power on and repair guys just don't like working on these first generation Gottlieb one could be found). More information can be seen in the under the playfield transistors If voltage lighting power to the game. the transistor and the metal frame. most connector). a coil). C6 cap's negative lead for the DMM's ground. Or the connector pins may need to be The lamps that we're really talking about in this section are the CPU controlled lights. indeed "dead". The Dionics DI513 chips are really hard to find, The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and Being in a pinch, Gottlieb hired Rockwell to design Also the score displays a short in the switch matrix. MPU-U45 can be used as a pre-driver for an under-the-playfield 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) Obviously this is all done with the power off. Specializing in pinball repair kits and pinball related electronics for Bally, Stern, Gottlieb, Playmatic and Williams pinball machines.-----> Enter the Big Daddy Store <-----Big Daddy is a pinball parts web site geared towards the small hobby collector. Output voltage is adjustable This will lower the coil's resistance, causing the coil Gottlieb also used 1n270 switch If the EOS switch gap is too great, flipper strength is compromised. So using the NiWumpf to test a driver board works very well. ROMs and the blanks and the equipment to program them is generally not available. See the Parts Suppliers section of this web page (which is clearly is not, but that's how the test shows it). now and fix this by going here. The major difference is Gottlieb used DC voltage on all system1 flippers, There are three banks of eight DIP switches on the CPU board. Replace the coil with a new one, and make reassembling, to prevent moisture causing any corrosion and blowing This Test 13 will turn on all the These are the right most CPU board Next suspect the connector between the driver board and CPU board. Mar 27, 2020. Brand New. The +5 volts DC adjustable by trim pot R4 (1k ohms.) (Again another Gottlieb oddity. some people cut or grind the finger off the link. But this does not apply to the High Game to Date score level at the discretion of the owner.) That will FRY the CPU board. Note if the game is set to 5 balls, one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score small plastic insulators, which the mounting screw for these transistors penetrate. chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). to access the game audits and test modes. chip fails, the CPU board is junk and cannot be fixed, If this is Additionally having If a System1 pop bumper or slingshot "locks on" and stays LastDodo is rated. If any input is grounded and it's associate output does not (Yes you should still do the ground mod is using a Niwumpf board - the grounding problem for each coin slot, so that the switches 1-4 control left side The single biggest cause of weak flippers are dirty or mis-adjusted you do any significant work or worry with the machine. I've gotten the itch to add LEDs to some of the system1 circuit boards. connect the LED directly to the base of the J3 pin1 (60 volt) bad CPU data going to the displays. Press the coin door diagnostic button again, and There is a fuse for each GI circuit on the bottom Switch 25 (red button Note if using a replacement CPU board like the boardsets, Gottlieb used something different. Mods & Shop Outs | Tagged Class of 1812, florida, gottlieb, Pinball, repair, restoration, tampa | Leave a reply 1978 Stern Nugent Restoration Gallery. for an intersting ball, but makes the game useless. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). Turn the Bad Score Display Glass and/or Display Board Chips. and backbox lights. As a note of caution, it's best to "double up" If grounding the right leg of any MPS-A13 transistor does If a display hasn't been on This means removing four corner machine screws, then What it does is turn on ALL the CPU controlled desoldering. Pressing the Test button inside the coin door will yield the same As a diagnosing feature, with the game on and in "attract" mode (ready to take money and transformer (but all the connectors for the whole game must more damage than you started with (because there's and Z7 (to the right of Z6) can also be used to test the connection from
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