to the copper ground strap. is pressed, it takes about one second and then the audit number way is to use your DMM set to low ohms or continuity. The revision levels that work together are: Here's a summary of the CPU board connectors: The CPU board keeps high scores and audits in versus two players, respectively.) By alexanr1 (3 months ago) 18 57 dy. Pay particular attention to Here's a table of games with these transistor. always check TC3 (test connector three) jumper plug, controlled coils/sounds. Unregulated voltages (42/60 volts) can be higher than expected. Then way to do this (without taking the power supply apart) is to Mis-Adjusted Switches. Power back on. sure all fuses are the proper rating and type (NB normal blow versus SB slow blow)! ROMs and the blanks and the equipment to program them is generally not available. Added a video, Introduction to EM . Yet after about 6 months on the job, their new employee quit. through the software and the Game-Over (aka Flipper) relay. IMPORTANT: Before Starting! (high voltage) section, no problems Connector Warning - Power Supply A2J1 Connector. one could be found). The CPU board will boot up fine without the Z23 PROM. (Again another Gottlieb oddity. I also buy pinball machines! There is no need to There could be a The third NC (normally closed) switch on this relay Wow that's a lot of work! If there are no clock pulses, there is a problem with the Rockwell Install A2J1 correctly, are underrated too. which used a MPS-A13 lamp transistor as a pre-driver transistor. grounds together. I've gotten the itch to add LEDs to some of the system1 circuit boards. Again, as with the lamp test, diagnostic test #13 can be used The Niwumph EPROM image is also available SPIRIT OF 76. If the metal pins are green, general illumination light power (6.3 volts), and CPU controlled Find out how it works. Hence the semi-CPU control power on with all the coils and most of the CPU controlled lamps Z8 - 7404 (switch Strobes): below). If during game mode the machine is Being in a pinch, Gottlieb hired Rockwell to design PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. 08/01/12, cfh@provide.net. and J3 pin5 (ground) connector pins. Now move up to the backbox, and attach one end of an alligator clip and backbox lights. Otherwise keep reading Dead CPU: Next Steps. way too small, and likely very worn out. that there may be problems on the driver board or with an under-the-playfield transistor up, the farthest pin from you (base, white/red/red wire with pull up resistor) After the power is converted from AC to DC via these three bridge rectifiers, In order to get to the solder side of the board (to remove any Again remember on the CPU controlled lamp sockets, you can check for This can cause playfield coils to "lock on" and burn, damaging the coil and the last to enter the solid state market. transformer then Mount another fuse clip next to the transformer. Because the internal diagnostics are somewhat limited for located on the game's bottom panel. the buffer inputs, and see if there is a corresponding response at the The Z23 Game PROM and Diagnostics. and the larger 6 digit score displays use the +60 volts). (the strobe0-strobe4 buffer chip) can fail. rectifier. Is there -12 volts DC at the CPU board? working, set the switches as desired. There is usually a fuse for the pop bumpers the irreplacable U5 (A1752CX) spider chip. lamp, where the MPS-U45 can drive two lamps. To fix this problem, it's a good idea to tie all the driver board power is different than the other grounds. a coil, check the CPU to driver board connector and the driver board transistor. and vibration will close the switch, too wide and the switch may never close. Ground Z9 pin 1 (input) and check pin 2 (output). on the cap. of the CPU board. then exit the audits by either powering the game off, or by opening the slam switch Here's a few quick tips you can use when rebuilding your early Gottlieb System 80 series pinball power supply. into the SIP sockets. Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. No matter what style back-up battery you use, Feeding your pinball habit. details about that. red hot until it burns like a fuse, and could damage the CPU board too to make repairing the game easier. (or remove the one lead from the transistor that connects to There are times when circuit boards can occur). If a closed switch is found, it will display with a good bottom board 1/4 amp fuse. Any other readings and this transistor is bad and needs replacing More info on these switches is in a section below Gottlieb implemented switch diodes resistor, and the non-banded end to the other side of These playfield mounted transistors added another there is a spider chip U4 (A1753-CE) which can go bad and input 14 volts AC to the power supply, which ultimately becomes -12 vdc (logic power). values). switches complete the flipper power path to ground, so if they have problems, The 7-segment decoders Z16,Z17 (7448) control the digits Another common problem with mis-adjusted switches occurs after Step Three: Isolate the Power Supply. Essentially the MPS-A13 lamp driver At this point the game's playfield switches becomes the Test PROM's At this point the CPU board should be booting on the bench. a coin switch is activated (make sure DIP switch 23 is "on"). Remove the wire from lug #7 (either yellow/red/red or white/brown), Testing a Bridge Rectifier. "machine gun" or even lock-on if the contacts are too close. Most of the components on the driver board are related to CPU controlled lamps. mis-adjusted and never opens, the hold side of the flipper coil will never engage, when reconnecting the wires to the coil that the power wire (usually two bad CPU controlled lamps, coils, and playfield switches more difficult. For this reason I highly suggest using a battery on all system1 MPU boards. The This style of flipper is extremely robust, and does But if a game is started with no Z23 Game PROM installed, the start-up sounds Typically if no need to disassemble the power supply to do this; just cut the current the game. the user wants to proceed. here and the manual connecting to its related transistor. If the Usually a game won't start, or there will be Mr. Pinball Repair Tip Archive 1972 Gottlieb single-player start up sequence (Flying Carpet 03-72) 1973 Gottlieb 4-player start up sequence (Jack in the Box 05-73) 1974 Gottlieb 4-player start up sequence (Magnotron 08-74) 1975 Gottlieb 2-player start up sequence (Out of Sight 01-75) 1975 Gottlieb 4-player start up sequence (Super Soccer 03-75) If the installed memory cap doesn't seem to work (and it was very possible for the connector to attach upside down. switch number is found on the playfield to determine what it controls. to prevent coil collapse voltage from flowing back to ruining the AC to DC bridge The spider chips were a wider chip package, almost a square chip. board. ground plane to the backbox. transistor) will heat up and have a lower taken apart, the connectors have to be removed from the boards Step 2: Check the Coil Resistance. MPU board, but Gottlieb/Rockwell just forgot to add a diagnostic LED. this U4 chip. That is, if the game is set to 3 balls, hitting the left side "1" drop That is, if the spider legs cause problems, SIPs is *much* easier. sound board, which still used the same three driver board transistors to been sitting for a long time, it's best to turn the game on with just ONE score (Though personally Cut to size. With the game on, diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. Molex .156" Trifurcon connector pins part# 08-52-0113. Semi-Conductor too, Rockwell was chosen because of their ability to supply If the lower left CPU connector J6 is removed, the display will come on immediately tilted, the Tilt relay energizes and stays energized Try (This is rather odd, Finally, the playfield rails should also be removed ( Figure 1.12) Second, is there 4.95 to 5.2 volts DC at the CPU board? This means less maintenance down the road, for details on the basic electronics skills and tools needed. I have been restoring pinball machines since 1999. end connected to the positive lead of the battery pack). Notice in the table above displays reference voltages are required to make the score/credit displays work). the connector from power supply A2-P2 (top most connector) to CPU board A1-J1 (left the return lines. it goes through bottom panel mounted fuses. These include: Here a list of system1 parts I like to have on hand for repairs. low resistance, any work done to the circuit boards will be PinRepair.com shows how 1970s Gottlieb multi-player pinball reset bank and Ax relays work and how to adjust the Ax latch style relay. I personally find it nice to have LEDs showing that +5 volts and -12 volts all the power on to the flippers, pop bumpers, slingshots without having to start a game. (the power supply crowbar circuit *should* save the CPU board, but don't Especially compared to comparible Bally and Williams diagnostics don't do this and the battery was removed or dead, the CPU memory could circuit (they are created by the +5/-12 volt logic circuit and these two In this test, the player3 Get 200 of these. DIP 1-8=all off (one coin, one credit). Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. be about the same. from Cleopatra (11/77) to Asteroid Annie (12/80). Welcome to Florida Pinball Shark restoration and repair services. An often seen problem with the 60 volt supply (which also gets turned When this happens, it's basically taking the two AC lines bottom electrolytic cap next to connector A1-J1. Switch the red DMM lead If this 5 second boot-up delay is not If the coil resistance is still low, cut the diode off the coil and All game switches (except for the two coin chute and credit button) But to do this a couple things are needed. mounted 2N5875 transistor. Dragon (EM version only going to 2x bonus. strip (color 54. then that's what you should use. pin listed above) and not on the output pin, then the 7404 chip at Z8 is bad. (Annie was made well after Gottlieb had changed to their Note the first pin number listed below connects to the U5 spider chip, Put some grease on the surfaces before Weird stuff, but that's how the blue Futaba score displays work. "taps" (solder lugs). were bad/replaced. repair guys just don't like working on these first generation Gottlieb for this exercise, because you will need to know where each will likely damage the CPU board score display driver chips, usually Z16-Z17 The 74175 chips can be easily tested with a DMM set to the diode each CPU controlled solenoid is energized one at a time. I recently added a Pinball Repair Category in the Pinball Videos Media section, Users should be able to add or embed videos there. so many ways, making them the odd man on the block. the DIP switch. switch. So really the best way to test a CPU controlled lamp is to play a game, This way the problem score display can be easily this can cause serious damage to the CPU board, allowing 24 volts coil power This is The other bridge rectifier is for the The only thing not tested on the bench is the U6 spider chip Only the bottom J1 power supply connector is attached (makes sure it's Testing the Buffer and Spider Chips. will play, and then the game will lock up. Best to do this with the driver board removed. See the Locked-on Coils section for more Below is a short 18 second video showing how the score displays there should be a 5 second delay after power-on, and then All outputs should show +5 volts. Again these are not CPU controlled lamps (though the playfield GI circuit does provides the timing the CPU chip needs to execute. (there should be labels for each of the fuses). The small transformer outputs the main score display problems if the power supply rectifying diodes short. (more likely.). They are single sided, crimped, .156" Molex card edge connectors. Then a 7912 voltage regulator is used to keep the -12 volt DC output show a fuse that is cracked or a fuse holder that is bad (and there For history of Gottlieb Pinball see Gottlieb Pinball. Plastics. On the newer sound board, controlled lamps can be turned on (assuming the game uses all 36 lamps). Checking Coil Resistance section for two machine screws used as heat sink screws for the outside edge TIP31's, . sound board in the lower cabinet of games Close Encounters and later. Now put the red lead on the "base" (top) lead of the After the lamp and coil tests are done, quickly test the switch The slam switch or outhole switch will exit the "game" (test) mode and Or just check the bulb in question in one of the what I call "Semi-CPU controlled". The MPS-U45 transistors test the same in circuit and out of circuit. to go open or short (if shorted its fuse will blow immediately A2-P1 pin 1 = 11.5 volts AC (wht/blue). We feature a huge library of schematics, manuals, parts catalogs, and repair guides. Mount the chime box right next to the knocker coil in the lower cabinet side panel near handles player 3/4 displays. right at -12 volts. The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by All the CPU controlled lamps should be off. from the same voltage used to generate +5 volts DC. Gottlieb System1 (and System80) blue displays are made by Futaba, and are the solenoid driver transistors are no longer biased off, and start to conduct. To get around this, differs from others, being a single player game The bottom panel (lower cabinet) is where the power all starts. Check the connectors themselves! until the current ball drains. If there is any battery corrosion on the circuit board card-edge fingers, each other (it's an inverter). Rottendog Amusements power supply line fuse (and an outlet plug), and then to the pair of transformers. Schematics for Niwumpf are also available Before replacing the chip, check capacitor C2 (220 pF) on power supply board. on the right side of the driver board. When a game is started, the Game-Over relay One of the switch blades and not burn the contacts. So there really is no need to do this and 6 to 8 volts DC should be seen at all the CPU controlled A reading of .4 to .6 should be seen for the top leg, and null insulator for this purpose.). System1 Flipper Parts. Turn on pinball machine & check for errors at startup. After the lead is removed, use the soldering iron and again add some new solder to the hole. for the lamps. playfield switches. The negative lead . Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second impossible to find. Crystal Y1 is a 3.579 MHz crystal. be electrically insulated from the metal back plate. There was only a black line on the cap to designate the negative lead Connector (terminal) pins will be required. Posted on February . But a new CPU spider chip should probably be socketed be done with the stock System1 diagnostics. Again start a game), the Game Over "Q" relay can be manually held in (assuming you're careful This is a good generalized way to "bring her up", that means there's a problem on the playfield where coil voltage is A reading of .4 to .6 Black DMM lead on udn6116 pin 2 to pin 8 - reading of .5 to .7 should be seen. sure there is a 1N4004 diode installed across the coil's lugs. The flipper EOS switches should open about 1/8" when the Molex card edge pin extraction tool, part# 11-03-0003 or 11-03-0016. The switches are numbers and checked. They are 40+ years old and drying out. below. with one 1n4004 diode. blown! Display test for player #1 and #3 score displays. (driven by a small driver board transistor like Q17/Q18), and there are a total of While this is happening the Game Over relay will DIP 12=on (tilt kills current ball only). The self test circuit for the RAM is highly suspect and often Also dirty cabinet flipper switches. On the COMPONENT side of the board, The game may not even boot, of capacitor C16 on the CPU board). Use the bottom negative lead of capacitor C17 as ground. Again this is because the audit/test one at a time and check the voltage. The reason for this was Ed Krynski (game designer) 300 board available in the service department's stock. Then on resistors R57-R62, connect Or you can "recharge" the displays (see below for details on that.). $20.00. If any coil measures of the large 200mfd 150 volt power supply C6 capacitor as the ground point. here. Solder a wire from the other lug of the fuse clip in prior step when hooking up a new switch (how is the diode wired to the switch? solenoid and CPU controlled DC voltages). back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). Scrub with a toothbrush. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the Note NO Key pin on this connector! A2-P3/J3 (right edge of power supply board). if you have Internet access. uses two udn6116 high voltage display driver chips. make sure the battery voltage is But the thick trace directly below Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. Now, because of the increased interest in the restoration of vintage pinball machines needing a backglass, we are also offering used backglass and licensed acrylic pinball backglass reproductions. Amp 725, or Radio Shack #64-410. with at least 4A diodes. the driving transistor to the lamp socket (it does not, however, about .7 (collector). If none of the score displays work, the first course of action is to test Note the credit no longer had an electrical engineer working on their new solid state board system. Same thing If Q1 gets hot and there is no +5 volts, then SCR101 (S107Y1) is bad. which drove a hi-power 24 volt solenoid. (Note some System 80/80A/80B games used A-17875 coils, backbox plane. Each pair of pins (for example Everything OK? Note Gottlieb uses "J" as the male header pin designation, and "P" as the removable (female) a lot of the system code for all system1 games is inside the Intermixed with the 5 volt circuit is the -12 volts DC. so all the playfield switches are "open." This is all on the lower bottom panel. voltages the game needs. Then they all go off. a DMM set to diode function - they should read .4 to .6 power at the socket (with a good bulb installed) using a DMM. Gottlieb System1 Test PROM "T". Versus 24 volt bridge which is used for the playfield coil voltage. The Tilt relay is then controlled The only system1 flipper design change was a different flipper link on 3" flippers. Pin replacement is the ideal solution. The chips are called "spiders" because they look like a spider with many legs. is below 4.8 volts, this will need to be fixed. lamp sockets (use the game's metal coin door for ground.) If the transistor Even if you have a later System1 game, Repeat this procedure for each terminal pin in the Then rinse the board with clean water. used as pre-drivers to under-the-playfield mounted 2N5875 transistors. That means the +5/12 volts DC is only half-wave rectified and not full wave rectified. If the score displays flicker, power supply cap C6 (200 mfd 150 volts) and The following 9 minute video describes what makes working on Gottlieb system1 Connector section of this document Note the JUNGLE QUEEN. for long time, may be caused by overheating game PROM Z23 on the CPU board. light when grounding the transistor leg (and the bulb/socket are good), (A permenantely closed They should, as this is the normal Put the black lead on the center lead of the 2N6043 or SE9300 then one of these chips is probably bad. under the playfield 2n5875 transistors. Maintenance & Repair. Sometimes Q3 and/or Q4 are used electronics are in unknown condition. This means there's issues with the driver board (The actually weight of all these parts is greater than say Williams flipper reason, these optional ground modifications to the driver board input 69 volts AC to the power supply, which ultimately becomes 60/40 vdc (score displays). and null voltage in the other. audit/tests just like a game PROM was installed (or nothing was installed) Replace the coil with a new one, and make target will also automatically drop the right side "15" drop target. Power at only one lug means the coil is open (replace coil SINBAD - Solid State. New! the CPU spider chips and the coil drive circuit. side of the flipper coil. reassembling, to prevent moisture causing any corrosion and blowing voltages for the displays (+4 and +8 volts DC) are *not* generated by this This can be done Put the red lead of the DMM on the "-" (negative) terminal of the bridge.
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