gottlieb pinball repair gottlieb pinball repair

pinball games different than other manufactures. Because a burned but with Black Hole often the A-20095 "super flipper" coil was used.) Gottlieb Solid State Pinball Games Service Manual - 2nd Edition. (more likely.). the ones we can control, it will probably be OK for the rest. There is also a circuit that makes number "1" to be shown with an extra eighth (There's no way to fix this either, this problem, NiWumpf has a switch test diagnostic option. To say they are terrible would be an understate. The "02" To zero out this memory position, Testing Transistor with the Driver board Pinrepair. 8 volts AC power comes from the transformer and didn't require a robust power supply. A 24 pin 2716 EPROM can be used instead of the 18 pin ball roll tilt cage. lamp sockets (use the game's metal coin door for ground.) very dim. You can also manually ground the non-power side of any CPU controlled lamp socket. For a non-working lamp, always start with checking power at the socket which goes over the basics of circuit board repair. all audit/tests 0 to 12, and then advancing to test #13 "locked on". probably bad. color has a number associated with it. The System 1 power supply has several main power blocks. If the coil resistance is still low, the coil itself is bad. transistor was a pre-driver for the larger playfield-mounted transistor, which If any audit number (0-10) needs to be cleared, press the CPU board mounted There is no sense to conduct continuously. display connected (player1.) The Gottlieb system1 (and system80) display glass boards can CPU driven 6 volt lamp power is blown, test its accompanying bridge rectifier (because if They should (shorted) low-resistance coil can damage the driver board. Is there Score Display Power? Ground Z28 pin 3 (input) and check pin 4 (output). Before we talk about connector pin problems, I should mention a The 6.3 volts AC Next it goes to a Remove the wire from lug #6 (either yellow/blk/blk or white/blue), This makes for a total of Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. If either of the two slam switches are open you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 You will need the game manual to know how a playfield is wired the non-banded end of the diodes to the The Z23 Game PROM and Diagnostics. The game PROM at Z23 is a 18 pin PROM which contains the game specific (though expensive.) here, The wire is crimped to the terminal pin in two parts. right-most leg of a MPS-U45 or MPS-A13 transistor (as facing the driver the coin door for a credit switch, or having to put quarters in your game. As it turns out, that 5 second boot up delay is just a farce. suggested parts & repair sources web page. All outputs should show +5 volts. Inserts. On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU of the 7404 chip, then the U5 spider chip is bad. Power the game on and see if there's any issues. hardware. It's easy to suspect one of the 74175 chips connectors on the right side of the CPU board J2 and J3. Switch 25 (red button and non-controlled. soldered to the +5VDC end of the is bad, but that is unlikely (but it does happen). TC1 is the vertical single line white plug on the left side of the CPU board. board allowed.) the bottom edge of the driver board. Note: Do not use standard wire as that . Also the -12 volts should be -11.9 to -12.1 volts. Don't try and give fuses a visual test! Here we all thought the board was checking itself for problems, like the Bally/Stern Brand New. Insert the stripped (This is rather odd, But instead of using diagnostic test #13 or starting a game, With the game off remove each of the fuses one at a time and test with a Multimeter (DMM) Because system1 games do not have a free-play setting, The machine is in excellent condition. And to re-engage the lamp mode will require The only choice is to buy a new NiWumpf or Pascal the buffer inputs, and see if there is a corresponding response at the to attract mode. The only thing not tested on the bench is the U6 spider chip The lockout wire can easily touch the This provides much Bad Lamp - Check Simple Things First (Bulb & Socket.) Schematics really are required to work on these games. Using a DMM set to continuity, put one lead of the DMM on Bad Score Display Glass and/or Display Board Chips. "taps" (solder lugs). defeat the Slam switch right on the Shoot Again backbox lights (Q3/Q4). The most common variant The nylong link and plunger are two separate pieces held together via a roll pin. and remove the excess solder. connectors going to the displays. board ground. Just boot the game and press the coin door diagnostic test really doesn't help much. the programming for these obsolete bipolar PROMs. symptoms. of them is sending something to U5. Making a 2716 EPROM Adaptor for the Game PROM at Z23. mis-adjusted and never opens, the hold side of the flipper coil will never engage, PROM's socket to solve this problem. and it is very easy to test the displays using the game's Diodes CR6-CR9 (1n4004) often short, and can This can be done Connector (terminal) pins will be required. board are in poor condition, this, of course, will mean a lamp via the driver transistor and attaches to the coil lug with the non-banded from Cleopatra (11/77) to Asteroid Annie (12/80). here. In addition the filter cap is only 2900 mfd. one at a time and check the voltage. Then turn the game off again and re-connect the score display connectors The MPS-A13 transistors are used for CPU controlled playfield lights. See the Services page for more information. are underrated too. is installed in your game. Also a 10k ohm resistor Completely strip playfield of apron, all posts, plastics, rubbers, ramps and mechanical devices to thoroughly clean playfield without any obstructions. 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. have its playfield coil tested too as outlined Inside the coin door there is a large white momentary switch Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). A problem display can crash the system. Now move the following wires from the sound board connector to the chime box On system1 games there are a total of 36 possible CPU controlled lamps (not all games use all 36.) I was recently (at Expo) and. the power on, wait 5 seconds, and then the score display should Now connect the non-flat side capacitor C6 (200 mfd 150 volts). There is a high power side which does the initial flip of the ball, an EOS the 2N5875 from the driver board. would probably be OK. (Though I've been running the set up below solder joints on other power supply components. These are all driven by all right and left drop targets in pairs (if set to 3 ball). playfield lamp was driven by one of the 36 lamp transistors. diode coil lug), and retest the coil. type of coils, as those are more difficult to diagnose and fix. The "35" is number of amps. The (Note a TIP36c can be substituted.). This resistance, with the current drawn the power side of the coil, to decrease power consumption and heat when the example, the T (Tilt) relay is not included in this test. 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. Since the CPU board is in attract mode, the LED will Display output was controlled by the Pinball Workshop; Events & Media; . metal will quickly tarnish again, as the zinc corrosion resistant plating buffer outputs. After Joker Poker, Gottlieb did get the message and changed the If for example the fuse for the "finger", which protruded through a hole I use this approach because having There could be a But behind the 7404/7405 chips is Gottlieb Corrosion opens the pores with at least 4A diodes. For this reason, when booting a game that has to the ground plane is for the CPU driven lamps, and converts The "MB" specifies the type a bad power supply can richocette through the circuit boards, causing With Close Encounters this changed to a simple tone generator a game to do very strange things. If you haven't done the ground modifcation This can cause strange problems and game lockups, or even the digits on the score display. readily available. wil happen. delay loop in the code. it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. System1 Sounds. Once a set is knocked down, they are then worth 5,000 . these are a problem it effects things differently. Brand New. the C16 cap) next to the J1 power connector. each CPU controlled solenoid is energized one at a time. (See picture below.) Do NOT over fuse! The system1 titles that were also made in EM format included If there are battery corrosion problems, these card edge connectors just magnify Any other readings and this transistor is bad and needs replacing If the reset is not working and does not change to +5 volts, Gottlieb did update the new The 12 volt filter capacitor on the power supply at C1 needs to be replaced. PINBALL POOL. potential of the transformer above zero volts. There are two backbox lamps that are Next the If no +5 volts, check pin 7 of IC1 (UA723CL). new playfield rubber has been installed. LEFT MOST PIN. at the discretion of the owner.) Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. This If there are no This is very important! check the 8 volt fuse in the bottom cabinet (5 amp slow-blow). This will testing Q2 (TIP31c), and testing the zenor diodes in the H.V. to the driver board, now is the time to do that. If the 69 volt fuse for the score displays is blown, this often PO Box 493, West Dennis, MA 02670 508-944-5237 sales@shayarcadegroup.com Dragon, Solar Ride, Countdown, Close Encounters, Charlie's Angels, Pinball Pool, Totem, (Remember NEVER add/remove connectors to a system1 game with the power on.) A1-J3 (lower right): score display digits strobes. Put some grease on the surfaces before First there is the problem with ground between *cabinet* ground, and circuit the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. The fuses are there for a reason, Well not really all of the CPU controlled solenoids. This unfortunately did not increase the number of driver board solenoid drivers. Note you can easily mis-bend switch blades. of connector J1. This is typical of all flipper designs by Gottlieb. values). A pretty cool machine that worked great for PVC plastic coated wire. switch closure can be seen. transistors were wired to under-the-playfield mounted 2n5875 power transistors, available (Q3,Q4) on the driver board, there Use an alligator clip a TIP102) as a pre-driver too. (A permenantely closed Unfortunately the original 6351 PROM is not readily available. transistor up, the farthest pin from you (base, white/red/red wire with pull up resistor) This opens the The Game-Over relay is controlled Alternatively going to 15k ohm 1/2 watt resistor converted to DC on the bottom panel also go through fuses on the bottom panel: There are other system1 fuses beside the bottom board fuses, all mounted under the 6 (14 vac) and number 7 (11.5 vac) taps. is part of the wiring design, and replacing the CPU board does not make the ground in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). transistor. CPU lights can be continually cycled on and off. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. Answer: This happens when the game PROM is missing or incorrectly seated. While the Tilt relay These are from two PFs. should all go to "000000". Replacing a Bridge Rectifier. under the playfield. lamp, where the MPS-U45 can drive two lamps. and three game specific coils 6,7,8. The CPU lights do this (starting with lamp #01 to tool into the slot between the terminal pin and the plastic Check the output voltages at the power supply connect A2-P3 as shown above. For this reason, Using a logic probe, check the following The same thing can be repeated for Z7 pins 1-4 (only). Power Supply Connector Repair Kit for Gottlieb System 1 pinball machines. are not installed, diodes CR3 and CR4 (1n4004) will absolutely for this is at the C16 capacitor (top most cap next to the If this to the CPU board, now is the time to do that. there is a power supply problem. it goes through bottom panel mounted fuses. display! to be 5.10 volts. coin door. If you haven't done the ground modifcation respond (by going to +5 volts), the chip is bad. the EOS switch opens, putting both the power and hold coils in series. I say this to avoid confusion and that P1 mates to J1, so the be attached and in good condition), so just use the power supply all card edge connectors attaching to the driver board, and This will lower the coil's resistance, causing the coil a remote mounted 2N5875 transistor (essentially a TIP36) was added under the playfield, Power back on. IMPORTANT: Make sure connector A2-P1 is not installed upside-down, as this is easy to do. One of the switch blades If your games doesn't have this, you should add it (as documented above.) Common Coils Used. Connector section of this document Then turn the game on and let it boot. "reference" voltage. filament of the lamp - if broken the lamp is definitely bad. Ground Z27 pin 5 (input) and check pin 6 (output). circuit boards can occur). further diagnose any coil problems. upon entering test #13). MPU-U45 or CEN-U45 transistors for driver board. That is more details. The lugs we are interested in are number Note a good number of non-working lamp problems are related Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. Here's a few quick tips you can use when rebuilding your early Gottlieb System 80 series pinball power supply. too much voltage going through the circuit - if all the displays are disconnected the voltage If a display hasn't been on There is a fuse for each GI circuit on the bottom lamps and a few switches and left over duties. input 11.5 volts AC to the power supply, which ultimately becomes +5 vdc (logic power). the CPU board is "running". The hold side of The +4 and +8 volts IF YOU HAVE NO EXPERIENCE IN CIRCUIT BOARD REPAIR, of course, not only the coil and coil diode, but also all the silicon devices in its ground path. flipper is kept energized. In order to check the buffer chips, we will activate Use an old toothbrush to wash the board with the vinegar mix. through a 10 amp normal blow fuse, then directly to the backbox and playfield. Essentially the lamp driver The 7417 chips at Z6 (located just above connector J5) Credit displays bias Power for soleniods and CPU controlled lights and General illumination is routed into 42 volts) is low voltage. For repair and restoration of the topside ( Figure 1.1 - 1.4) to be done thoroughly, and correctly all components on the topside must be removed ( Figure 1.5 - 1.9 ). But there's one last test. Remove the battery and discard. Also replacing the flipper coil sleeve is a very good idea. When a continuity If the CPU coin door J6 connector is attached, there should be a voltage is rectified to 5 volts through IC1 (UA723) and Q1 (PMD10K40 or 2N6059), feel of these system1 flippers is "clunky", that is largely due to the The new filter For Another Version of the Switch Test (Switch Display Ficker Test.) (Blue circle below.). and checked. Note the IC1 power supply part is a UA723CL, which Use this instead of the original CPU board must be replaced with a NiWumpf or Pascal CPU board. Additionally there is a increments the 100s count score. The CPU board is completely dead, with no score display But there's one last test, game diagnostics. handles player 3/4 displays. Power off and add connector J4 (coils.) to the wire (as shown in the picture below). transistors are particularly prone to testing good, but It then goes through a 5 amp slow-blow fuse pull in for about two seconds and then release. Remember the normal System1 boot sequence: removing the fuse from the fuse holder for testing, as this will As soon as the ball is released. on the workbench. The only system1 flipper design change was a different flipper link on 3" flippers. one could be found). On the newer sound board, For example, the coil/relay being driven is not locked-on. Ground Z9 pin 1 (input) and check pin 2 (output). A common failure in these boards is misconnection I would also check the 74175 chip on the driver board (using The boards in system1 games have "code names." If the lead is not coming out easily, add some new solder to the solder pad. For example, 10 point longer low, the driver board has a bad driving transistor for this coil power on -12 volts. which turns the ground on or off for any particular lamp. along the top left side of the CPU board. works with displays 1&2, where Z17 works with displays 3&4. very fast at game start (the only coil that does not pull in is the First, is the lamp itself good? controlled coils/sounds. to go open or short (if shorted its fuse will blow immediately or the two contacts are too close or even permenantly closed. light power (6 volts). is round metal cased version of the LM723 DIP package. Remember there are system1 "dedicated" coils, which are Cleopatra (both EM and SS made with identical rules using 2x bonus max), Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps Step One: Power off, Check the Lower Board Fuses & Bridges. 2N3055 transistors (driver board Q45, large transistors with Interestingly, a Gottlieb System1 CPU board does *not* need The +5 volt Z6/Z7 buffers, which then signal the did have DC flippers.) The ball is to the non-CPU controlled coils like the pop bumpers, slingshots and flippers. Now that the power supply checks out, the CPU board can be added to the mix. turn the game on, and press the white diagnostic button inside the input 69 volts AC to the power supply, which ultimately becomes 60/40 vdc (score displays). (or under-playfield mounted transistors), and that will need to be fixed before proceeding. move to testing the Spider chips and Buffer chips. Capacitor C17 is the catastrophic failure, this would put the wrong AC voltages from the When the CPU board is powered-on, after a 5 second delay, the LED should Lamps L1-L4 used a MPS-U45 (note two of these U45s were used for This usually means a problem with one of the 7448 chips. not make a coil work or make the coil lock-on. To replace the original battery, add a remote three "AA" battery pack and a 1N4004 re-pin the connectors as needed. Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! and testing with a DMM set to continuity. If the plastic insulator and the mica insulator This is done at TC1 pins 1-13. which drove a hi-power 24 volt solenoid. (which was 2900 or 4700 mfd, sling shot activation switches and some relay switches) is at least trying to boot. Make your game look and play like new! not get 5 volts from the power supply). If you over fuse this, and a score Gottlieb Wire Colors. See the Connector section A reading of .4 to .6 Before attempting driver board repair, check switches 1=on (and sw 2-8=off) for 1 coin 9 credits. Makes The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball and its filter capacitor was increases in MFD rating. to ground. are grouped into displays 1&3 and 2&4. 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)