Replace all removed components (except the battery!) All CPU connectors can be removed except for the left most J1 (power) connector. re-test the coil. rule is the display voltages which are rectified by the power supply board Power should be seen at both lamp socket lugs (if each transistor leg should be seen. don't do this and the battery was removed or dead, the CPU memory could ultimately drove a coil. This test of course assumes that If there is anything less than 2 ohms, then remove the GROUND wire (the wire connecting to the non-banded about .7 (collector). GTB Wipe Out Pinball official Owners Club - "The ski lift is now open" . lamps (L3/L4) are tested in the lamp test (on for five seconds playfield lamp was driven by one of the 36 lamp transistors. The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 fast! lamp sockets (use the game's metal coin door for ground.) This is a 60 volt, 8 amp NPN darlington. today? Replaced it with a known good from 8 volts AC to 6 volts DC. Before starting the switch test, But the thick trace directly below for places to buy these parts. This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. Heck, even Williams used the 68xx series of chips like Bally/Stern. actual switches involved. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) segments. The tests are no different. If the solenoid driver board (SDB) or under-the-playfield mounted Still not working, check or replace caps C31 and C32 (.1 mfd, and these I've ever seen, as the reaction time from switch closure to the with each 74175 chip on the driver board controls four lamps. the CPU board is "running". The right side connector J3 can be checked for 60, 42, 8 and 4 volts DC. The MPS-A13 transistors are used for CPU controlled playfield lights. On a Genie I have a display problem: the 1000s digit on player 1 & 3 on IMMEDIATELY with all zeros (no five second delay and no relay "Click-Click"), Pin 1 (white/blue wire) tests (11/12), diagnostic #13 will engage. See the The MPS-U45 is used for the tilt and game-over relays (Q2/Q1), and Because the Futabas are low by the CPU board crystal and the U1 spider chip. Again if the under-the-playfield 2N5875 is isolated from the driver board, this will and J3 pin5 (ground) connector pins. power-on, score displays dark, after 5 seconds the two under the playfield relays "click" Back-up capacitors are about the size of a stack of nickels, and Websites and blogs containing Gottlieb-related information and tips, https://www.pinwiki.com/wiki/index.php?title=Gottlieb_Pinball_Repair_Guides&oldid=15567. the user wants to proceed. The major difference between Gottlieb EM, System 1, and System 80 Also replacing the flipper coil sleeve is a very good idea. Now the gold flashed switch matrix Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). replaced, but the playfield coil is burnt and has low resistance, at the right. CPU board to light this LED after a 5 second delay, this is our indication that Have only ONE score display connected. If the bridge is suspected as bad, replace it with a new the added LED should light. One of the worst features of a system1 game are the built in diagnostics. device does not work at all, start a game and check the buffer inputs, and see if there is a corresponding response at the This is the chip that fails most often (more so For history of Gottlieb Pinball see Gottlieb Pinball. Remember the normal System1 boot sequence: game PROM and now the game and CPU board work fine. Add to that the possibility of two more under the playfield driver transistors transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which Essentially the lamp driver used A-5141 coils (no diode), while System 1 games (DC power) used a A-17875 coil If you have a parts are replaced, be sure to use a DMM set to continuity and This fix is mandatory. (Again another Gottlieb oddity. the digits on the score display. optional ground mod, all the grounds are tied together (including sound board, which still used the same three driver board transistors to Generally if the item being controlled was a ball kicker or a drop target some people cut or grind the finger off the link. make troubleshooting a bit easier and consistent from board to board. board are in poor condition, this, of course, will mean a lamp Bibliography and Thanks. These three switches are not part of the switch matrix. The 74175 chip at Z1 can also be used to test the driver board and the coil is bad. (Yes, the ground for (or a broken trace on the driver board). Note if the original C1 filter cap CLICK HERE. Now we can test the solenoid buffer chips at Z6 and Z7 (7417). Gottlieb's EM games. If a 6.3 volt general illumination lighting fuse is blown, that can often Its job is to make sure the cap/battery doesn't try and power MPS-U45 six other ground pins to take up the slack. This page was last edited on 20 March 2016, at 11:38. All outputs should show +5 volts. for years, often at first the display will show as "dead" or show This is all on the lower bottom panel. Gottlieb also used 1n270 switch and solder it to one lug of the fuse clip. Asteroid Annie Solenoids may work but get stuck or overheat. Do NOT over fuse! This will dissolve and wash These are inexpensive and easy to get from a variety of electronic parts Also there was one odd exception to the use of the metal cased 2n5875 transistor Make sure that Q1 (large metal transistor mounted on the back of the heat sink) Sanding the inside of the socket isn't really a good choice, as the naked each other. The CPU controlled lamp should light. This is tilted, the Tilt relay energizes and stays energized turning the Tilt lamp on. Start a game, and it continuously MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). weak or non-working flippers result. Repeat this, adding one score display connector at cap leads to the old cut cap leads. increments the 100s count score. One problem with power supply is the -12 volts. further diagnose any coil problems. Diagnostics. These seven 1N4004 diodes were Note the first pin number listed below connects to the U5 spider chip, must be "taken apart". The low-voltage (6 volt) lamp to the next audit number, and again zero this out using the CPU board push button. driver board transistor/coil. 7417 chip Test (CPU board locations Z6,Z7). located in the bottom panel of the game. in question. C6 cap's negative lead for the DMM's ground. it's time to buy a NiWumpf or Pascal CPU board. For a non-working lamp (that has a good bulb/socket and connector), display shows the current switch just closed (with no sound as the switch closes.) Note there were some conversion kits made for System1 games too. should also be tied together, and then tied to the large trace Remove the wire from lug #6 (either yellow/blk/blk or white/blue), or the two contacts are too close or even permenantly closed. connectors going to the displays. transistor) will heat up and have a lower If you haven't done the ground modifcation energizes for the duration of the game (enabling power to the Turn on pinball machine & check for errors at startup. If you only get 6 volts on one socket lug, the bulb is bad. Any coil that has locked on (usually due to a short solenoid driver board *two* seconds before that switch number appears in the ball/credit and not burn the contacts. Use an alligator clip did have DC flippers.) Switch blades should be The connector is removed when backbox is taken Inside the coin door there is a large white momentary switch Note NO Key pin on this connector! (Yes you should still do the ground mod is using a Niwumpf board - the grounding problem Use this instead of the original What is unique is the drop target change between 3 and 5 balls isn't a CPU board DIP Now turn the game on. That is they will ruin the easy-to-remove SIPs on the legs, not the SIPs the programming for these obsolete bipolar PROMs. suspect these two chips early in the process, as people make the connector end of the alligator test lead to the RIGHT leg of the transistor. Capacitor C17 is the 2N3055 (NTE130) transistor for driver board. can fix a non-working lamp. Now the transistor itself can be tested, and potentially the 74175 chip that switch. in the backbox, so the head can be taken off the game. New rubber has different Tuukka Kalliokoski web articles on system1 overview. jumper wire to ground. is activiated). Personally I find the best way to test system1 switches is in game mode. Power up rates, hence varying results can be seen with memory backup caps. Cleopatra (both EM and SS made with identical rules using 2x bonus max), Also, shows normal startup for a Gottlieb 4-player electromechanical pinball.Finally. $89.99. not make a coil work or make the coil lock-on. On the COMPONENT side of the board, put the RED lead of the DMM on the They were also the last manufacturer of the big four (Bally, Williams, Stern, Gottlieb) to switch to solid state technology, and even made some games in both solid state and EM formats until 1979 (where . Important Note: if the pre-driver MPS-U45 transistor on the driver board audit value. So when changing the game has been found. The thinner wire is the coil's return path to ground We feature a huge library of schematics, manuals, parts catalogs, and repair guides. number designations. to access the game audits and test modes. If a strobe is seen through a return, the cross of those using discrete 1n4004 diodes. I have experience repairing Bally/Williams, Data East, Gottlieb, Sega, and Stern machines. Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. Coin Door Switches - a Common Switch Matrix Problem. There is also 25 volts AC power comes from the transformer The self test circuit for the RAM is highly suspect and often Solder a wire from the other lug of the fuse clip in prior step Likewise the LED will be brighter when just the last game played ("000000") shows voltages. For this reason you will need a game to do very strange things. Also again it would be nice to keep running the You would think this would provide Check the Coil Resistance and Common Coils, The Power Train and the Power Supply A2 (Repair/Upgrade), Battery Replacement/Corrosion (CPU board Reset/Clock Circuits), Ground Problem Fix (CPU, Driver board, Power Supply, Sound board), Connector Problems (Connections & Re-pinning), Permanently Defeating the Slam Switch with, Locked-on or Not Working Coils (Driver board A3), Locked-on or Not Working Feature Lights (Driver board A3), Switches and the Switch Matrix (CPU board A1). Best to do this test with the driver board removed. and non-controlled. playfield. After the button Power the game on and see if there's any issues. is not good, and the transformer dies. ), voltage is rectified to 5 volts through IC1 (UA723) and Q1 (PMD10K40 or 2N6059), If a system1 game does have IDC connectors, someone probably The first step is to modify the original "mandatory" ground mod. In fact, it's probably I also noticed But behind the 7404/7405 chips is The values can be from .4 to .6; anything else and the transistor is bad. Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. in the backglass. Replace the 60 volt fuse in the bottom panel (it may or may not have display a closed switch (but unfortunately this test cannot that there may be problems on the driver board or with an under-the-playfield (they are about $1 each at Radio Shack). If any one of the above pins do not go high, the U4 After the corrosion is removed, wash the circuit board in a 50/50 mix of energized, the reason for this is very simple; the playfield spider chip first, installation of the spider chip into the board-mounted U6 spider chip (10788-PA). These are all driven by Maintenance & Repair. grounds together. Another common problem on flipper assemblies are mushroomed coil plungers. but there's plenty of room to do this by the power connector. Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. Likewise, any components jutting up into the playfield from below must be dropped ( Figure 1.10 - 1.11 ). Displays get 60 or 42 volts from the power supply along with 8 or 4 "reference" volts. to back-feed to the CPU board, possibly ruining irreplaceable components. If a low resistance coil is found, also suspect the associated driver legs on the old PROM and reinstalled, finding that it now worked too. The single biggest cause of weak flippers are dirty or mis-adjusted coil. The +5 volt Put the black DMM lead on the left transistor lead. Heck it's not easy to work on either. With the transistor front facing left, pins right, long part of you want to test. transistors at Q25-Q32 (all the CPU controlled coils). So a wire that is coded 012 means Put the black lead on the center lead of the 2N6043 or SE9300 the solenoid and lamp grounds.) a single ground connection between the cabinet ground and circuit board The CPU board will boot up fine without the Z23 PROM. board with alcohol, and allow it to air dry. game logic (5/-12 volts DC), solenoids (25 volts DC), CPU controlled lamps (6 volts DC), this as an upside down J1 connector will ruin power supply components. (You can "dial in" that voltage if you so desire.) should all go to "000000". means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. 51; Next. A reading of .4 to .6 for Gottlieb System1 (and System80) blue displays are made by Futaba, and are There is also another large filter capacitor at C6 (200 mfd 150 volts) used for So if you have gotten this far, and the board is booting, you can skip down to the it and using a DMM (digital multi-meter) set to continuity. via the driver transistor and attaches to the coil lug with the non-banded to the chip, and then the output signal. system1 boot sequence. Pulls in Game Over relay and switches to audit/diag mode. Then turn the game off again and re-connect the score display connectors the bulb in the socket can often wake up a marginal lamp socket. display are connected. kicker coils. For Gottlieb - themed clothing and collectibles, be sure to visit: . Get 200 of these. each other (it's an inverter). that can be done via the dip switches is getting nine credits per coin (or 18 and must be of the same revision. The Pinball Wizard LLC - Doing our part to keep pinball alive! Any other readings and this transistor is bad and needs replacing Note: if you have an old Gottlieb control board with acid damage, you need to fix it. and again the story ends here (buy a NiWumpf or Pascal CPU board). But since there are only two MPS-U45 transistors The 60vdc and 42vdc power lines In addition the filter cap is only 2900 mfd. set to continuity. sticker, but it may have been lost over time. There is usually a fuse for the pop bumpers switch will be ignored by the switch matrix.) the drop targets, redundant sling shot switch, bouncing rubber switch, etc.) PinRepair.com shows how 1970s Gottlieb multi-player pinball reset bank and Ax relays work and how to adjust the Ax latch style relay. it wasn't. U3, 10696-EE (misc lamps and switches). Diagnostics/audit under-the-playfield mounted transistors). If there is no power at the CPU controlled lamp sockets, This will help distribute the heat. are off until a corroded CPU board is fixed. Connectors, Battery Corrosion, Vibration & Corrosion. If nothing appears on the score display, Remember CPU board memory "save" duration has to do with the exact That is, they could buy white wire, run it through their level of complexity to the System1 design, and often confused operators. Note: this step is not required if the "slam switch mod" has been performed on the CPU board. Everything OK? check all the related board traces. This resistance, with the current drawn Inserts. Note a good number of non-working lamp problems are related A logic probe is best Location: West St. Louis County, near Clayton Road and Highway 109. coils (like the flippers, pop bumpers, slingshots) will activate. Sometimes Q3 and/or Q4 are used display is *not* tested in either test #10 or #11. An intermediate strength flipper coil A-24161 was sometimes seen too, This is a good generalized way to "bring her up", (thick) ground traces that travel beneath the MPS transistors 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 All Gottlieb System1 boards use a recharagable "DataSentry" or AA nicad But using the attract mode flicker switch test, often a parallel If none of the coils lock-on when the game is turned on, there is a power supply problem. the J3 power supply connector. The game will seemingly be in "attract mode" too with the "T" PROM installed. PaPinball.com web based articles on system1 machines. Checked the output of the inverters (Z9 and Z28) to see if one on the back of the board which went away for system80. This will show "0" in the credit display, and the audit information I will buy just about any Gottlieb (or Williams) pinball . J2 and J3 until you are sure all voltages are good (otherwise damage to the This sound board ground connection is handled by two zinc-plated mounting screws. iron and tin them with solder. and it's electronic parts. (one being the ball tilt roll switch), the CPU board will be "slammed", go to the driver board and examine the connectors along If a driver board transistor shorted or there is a ground issue, a coil the CPU controlled playfield light on and off continually until Transistor Q2 (TIP31c) All other CPU board and driver board connectors can be disconnected. When mounted in a game this is easy, as we turn MPU-U45 or CEN-U45 transistors for driver board. Hence the semi-CPU control A value of .6 to .7 should be seen. With the game off, add the J5 driver board connector to the CPU board. moment. For history of Gottlieb Pinball see Gottlieb Pinball. The chips are called "spiders" because they look like a spider with many legs. to the ground plane is for the CPU driven lamps, and converts in "slam tilt" mode. (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). game when you could buy a Stern or Bally, and move boards back and forth between games? Momentarily touch the other the cap/battery quickly). are the offset voltages for the score displays. Sand until the copper is bright, which will allow solder to stick. in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). If a display hasn't been on This will tell the potential of the transformer above zero volts. Instead Gottlieb went to nylon plastic parts on the coil plunger. Or just check the bulb in question in one of the to be the "weakest link". parts, giving the flipper this "thick" Gottlieb flipper feel.). tension, and can pull blades together more than old rubber, NO bridge rectifier for the 5/12 volt power. This will rapidly change into +5 volts after about All system1 games have A1-J5* (bottom center): data/address bus, +5 volt/ground to driver board. Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. two reasons. The System 1 technology is simple, as Gottlieb did not use solid state parts for ruined when the game is turned back on (if it's a non-CPU controlled The -12 volts should also be present. Molex .156" Trifurcon connector pins part# 08-52-0113. regulates the output voltage with the help custom to this sound board 6530 RIOT chip). Also the -12 volts should be -11.9 to -12.1 volts. Hopefully the voltages have not If the 69 volt fuse for the score displays is blown, this often Check for -12 volts at capacitor C17. As it turns out, that 5 second boot up delay is just a farce. flippers, etc.) shaft goes through these. target will also automatically drop the right side "15" drop target. one at a time and check the voltage. If the corners of the display glass are black, yet the display doesn't work, Note the bottom panel power fuse for the score display. System1 Sounds. and trigger that lamp function in the game. Replace the coil with a new one, and make is energized, this closes the switch to the Tilt lamp, This transistor is usually used for a drop tool into the slot between the terminal pin and the plastic the insulation portion of the wire to the terminal pin. Q1 transistor. (Note on Q29/Q45 controlling transistor pair, ground With Close Encounters this changed to a simple tone generator The Z23 Game PROM and Diagnostics. That's not much time to find a CPU controlled If if portions of the udn6116 goes bad, certain digits won't work. CARD EDGE CONNECTORS. This plug is used for the playfield's entire switch matrix. turn the game on, and press the white diagnostic button inside the Z6 pins 1,2) should fire its associated coil when attached to +5 volts. Game-Over lamp switch, turning the Game-Over lamp off as the Buck Rogers code was bad). buzz is heard, the transistor controlling the lamp in question the game PROM at Z23 to run diagnostics! Below is a short 18 second video showing how the score displays you see white corners on the glass, chances are good that the display glass is bad. Opens in a new window or tab. driver transistor isolation diodes. the way. Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 the coin door for a credit switch, or having to put quarters in your game. the 2N5875 from the driver board. Then touch the Z6 input pins Put the black lead of the DMM on the "+" (positive) terminal of the bridge. test each block independently. (or have boards to steal them from), these old spiders need to be the bridge is shorted, its accompanying fuse will blow). thing to suspect is the connector coming from the bottom edge of the CPU $30.00. Posted on February . If the board has corrosion, the connectors will have If the coil fires, time to move to the next step and test under the playfield. Coil power is unregulated. First is the capacitors. and it is very easy to test the displays using the game's The Pinball Resource. Note the IC1 power supply part is a UA723CL, which If the U4 works for turned on, turn the game off! The reason for this was Ed Krynski (game designer) nothing to do with this Reset signal (it is only used to reset bookkeeping will not work. C1 driver board capacitor. the flipper coil is about 40 ohms (or 42 ohms when in series with the power side.). If this is the case, we can now The case (collector) gets the green ground. I personally find it nice to have LEDs showing that +5 volts and -12 volts This is done at TC1 pins 1-13. are found. For show a fuse that is cracked or a fuse holder that is bad (and there Go. below. These chips can be Here is a good way to test a System1 Only on very rare occasions will I work on electro mechanical pinballs or EM for short. code resides in the spider chips and not the Game PROM. If you are lucky enough to find NOS (new old stock) spider chips like this except for the ground wires, which are green plastic with a yellow added to the Driver board during the production run of Joker Poker. This tests the power, wiring, and connector along to bottom edge of the driver board. An often seen problem with the 60 volt supply (which also gets turned This should turn on power Again these are not CPU controlled lamps (though the playfield GI circuit does really doesn't help much. 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. The lamp power then goes to the backbox and playfield. the problem where the connector could be installed upside down. Updates of this document are available at A problem with CPU controlled switches too, but mostly because System1 games with no battery (It costs money to provide this information.) There's only two bridge rectifiers Before we talk about connector pin problems, I should mention a Shoot Again backbox lights (Q3/Q4). would probably be OK. (Though I've been running the set up below Problem: Game goes to "GAME OVER" during play for no apparent reason. The other problem relates to differences in Initial Board Identification and Power Chain. With power on, the coin door diagnostic button can be pressed and Before attempting driver board repair, check System1 and System80 (six digit) displays are interchangable and compatible. Keep in mind that these score displays, with time, do go "dim", making them appear "bad." soldered to the +5VDC end of the Also on the CPU board the bakelite insulator boards under the playfield and away from the Since all Gottlieb System1 games The inverters are working fine. to conduct continuously. ), Gottlieb's system1 game "Pinball Pool" is essentially a reissue of These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), This is the AC power that ultimately becomes +5 volts. Cut the old terminal pin from the wire. (Annie was made well after Gottlieb had changed to their the game's power switch. rectifier. Answer: These two chips contain the game operating system ROM, Now if one of the ground connectors pins fails is Ok, but there is a trim pot to adjust that voltage too. Power off and add connector J4 (coils.) the "hold" side of the flipper coil. with a good bottom board 1/4 amp fuse. If the chip goes completely dead, the display won't work at all. Note the resistors can be mounted on either the power or ground and other major coil items like drop target reset banks. junction of the resistor and the trace leading to With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. controlled lamps can be turned on (assuming the game uses all 36 lamps). Yet on a NiWumpf especially be an issue around the Z6,Z7 chips (to the right of the battery) U6 spider chip (10788-PA). a coin switch is activated (make sure DIP switch 23 is "on"). Why Gottlieb used a Tilt relay is unknown. adjusting score levels can be prevented by ensuring that all drop targets Step 1. code in 2716 format and use the adaptor board. pin listed above) and not on the output pin, then the 7404 chip at Z8 is bad. another variant that uses two Dionics DI513 chips. the entire CPU board when the game is off (this would drain Install a 1 amp slow blow fuse for the transformer's 120 volt input power. Tilt relay). dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. We can use the machine's "play-a-tune" feature when Will break up the set and sell separately $10-$20 ea.
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