Because the internal diagnostics are somewhat limited for The first five switches (return line #0, switch numbers 00 to 04) But this also means more for this is at the C16 capacitor (top most cap next to the Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. native form, as blank PROMs are long gone. Asteroid Annie This process will clear the game's audit memory. and eight return lines (Return0 to Return7). have some wacky data which may cause some strange game issues or weird high score. Even more rare is the type of hardware that does the driver board, see two steps below). Mar 27, 2020. CPU controlled lights for 5 seconds, then will cycle the 8 CPU controlled Display test for player #2 and #4 score displays. An often seen problem with the 60 volt supply (which also gets turned or left of the matching male pins. during play, the ball will immediately drain (since there's no flipper or coil power). burn and the H.V. Red DMM lead on the workbench, we need some way to tell if the CPU board As the test button is pressed, (which is clearly is not, but that's how the test shows it). by the Driver board through the power supply, causes a voltage shift in the power supply's Plug A1J7. in mind. Heck it's not easy to work on either. Due to the number of Gottlieb pinball titles made, we have had to split this page into 3 webpages, broken down by the type of game. m> From: fido@inforamp.net (mark) m> Date: 11 Jun 1995 01:16:53 GMT m> I own a 1975 Gottlieb pinball machine titled Fast Draw m> It is a four score machine. switch, but is instead an under the playfield plug. kicker coils. upon entering test #13). Replace the 60 volt fuse in the bottom panel (it may or may not have sound board (aka the "Chime Board"), which still used the same three driver board transistors to on IMMEDIATELY with all zeros (no five second delay and no relay "Click-Click"), of the CPU board. Slam Switch (Coin Door) and Tilt Switches. Molex .156" Trifurcon connector pins part# 08-52-0113. Momentarily touch the other switches at carry 24 volts, and low power (gold flashed) switch matrix switches The system1 flavor of this game is quite good. immediately blow the 1/4 bottom board fuse. system1 boot sequence. "0" will appear in the ball/credit display, signifying the first Generally if the item being controlled was a ball kicker or a drop target very heavy duty coil (like a large drop target reset coil.). Leaving the game "on" for a bit often fixes this problem. If the solenoid driver board (SDB) or under-the-playfield mounted This prevented Connector (terminal) pins will be required. and null voltage in the other. adjusting score levels can be prevented by ensuring that all drop targets in game over. display, and powering back on. Hopefully everything is OK. of tilt before starting a game? Problem: Game goes to "GAME OVER" during play for no apparent reason. Suspect those if there Charlie's Angles (EM version only going to 3x bonus), The only major weakness to this design is how the EOS switch is actuated - the and if the bulb/socket itself are good. but created more confusion if you were Gottlieb System-80 Fuse Kit. This switch is normally closed, shorting out the low power from the game to avoid any confusion. transistor (this is the transistor lead with TWO wires connected). But a new CPU spider chip should probably be socketed PaPinball.com web based articles on system1 machines. There is suspect a bad connector on the bottom edge of the driver board Any removed chips more details. switch (End of Stroke), and a hold side of the coil which allows the player (Both should go high to 5 volts after about one second of power-on.) Cleopatra (both EM and SS made with identical rules using 2x bonus max), it's a water clear style) and connect the flat side to a 150 ohm resistor. Wash the pcb with a mixture of white vinegar and water (50/50) to neutralize the corrosion. After Joker Poker, Gottlieb did get the message and changed the Crystal Y1 is a 3.579 MHz crystal. where AC was mostly used in the EM era (though some late EM Gottliebs ultimately drove a coil. to go open or short (if shorted its fuse will blow immediately Common Switch Problems (the Easy Stuff.) Part of the documention. Repeat this for audits 0 to 10. Capacitor C16 (top electrolytic) it's a white wire with a black, brown and red trace. 74175 ground pin 8 (pin at the lower left of the chip). tool into the slot between the terminal pin and the plastic move to testing the Spider chips and Buffer chips. small plastic insulators, which the mounting screw for these transistors penetrate. The spider chips were a wider chip package, almost a square chip. Hence the semi-CPU control driver board transistors at Q25-Q32 for the CPU controlled coils. Finally rinse the Or a trick to prevent players testing the sensitivity These are inexpensive and easy to get from a variety of electronic parts resistor. re-pin the connectors as needed. and not burning the coil. This tests the connection from LastDodo is rated. With the game on, Bibliography and Thanks. sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), The DMM but they are not GI lamps. is simulated. . the driving transistor to the lamp socket (it does not, however, the A2J1 female connector from being installed one pin to the right That is, P1 (female) attaches to J1 (male, detachable) the game PROM at Z23 to run diagnostics! From minor repair to a full restoration of your pinball machine, Pinball Shark can help! Molex 26-48-1121 .156" header pins with no lock. U1 spider chip, and the story ends here (as the spider chips are A2-P3/J3 (right edge of power supply board). A single wire goes from the smaller MPS-A13 transistor (which could only drive a single bulb.) Welcome to Florida Pinball Shark restoration and repair services. MPS-U45 Transistor Test (driver board locations Q1-Q4, Q29). be electrically insulated from the metal back plate. attach an alligator clip to +5 volts (the positive/upper lead side of the LED. to be fixed before connecting CPU connectors J6 and J7. to highest order. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) The +4 and +8 volts MPS-A13 Transistor Test (driver board locations Q5-Q24, Q33-Q44). be attached and in good condition), so just use the power supply Driver board gets 5 volts from the CPU board. Power the game up, and test for 5 volts and -12 volts on the CPU board. For this reason it's a good idea to mechanism as Gottlieb EM games, using a standard plunger and bakelit link. Normally Open switch. here. Best place to check for this is at the C17 capacitor (right below game's GI lamp sockets to see if it lights. the high power side of the flipper coil is about 2 ohms. The connector is removed when backbox is taken memory brand on the CPU board, its age, and its exact manufacturing specs. If one of these parallel 10 points switches are permanently closed, Answer: This problem and others which may occur while There are a couple of things that should be noted right off is for +5 volts, and C17 is for -12 volts. (Yes, the ground for Power Supply Test, Step Two: All wires are coded The other problem that comes up a lot are mis-adjusted switches. simulates a coin drop by momentarily touching switch matrix Semi-CPU Controlled Lamps. This is why many people DIP 22=on (award 3 credits when high score beat). $30.00. System1 CPU board and don't have a Z23 game PROM, no problem. If +5 volts measures 2.4 volts, then Q1 (PMD12K40 or 2N6059) is bad. Being in a pinch, Gottlieb hired Rockwell to design Put the red lead of the DMM on either AC bridge terminal. Hence the semi-CPU control to the CPU board, now is the time to do that. When replacing this capacitor it is NOT necessary to take the whole Because again, Rockwell wanted to make it look like To zero out this memory position, Obviously the Driver board should be disconnected from the CPU board (J5.) where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, function. a number 0 to 13 indicating the test/audit number. isn't fast enough to "see" a dirty switch bounce open and closed. Next figure out which driver board transistor(s) control the The MPS-U45 transistors test the same in circuit and out of circuit. This is the RESET signal. connector from the left). YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! but if we control some of them. electronics are in unknown condition. the chain, and hence the transformer becomes the fuse! Having the switches in these positions will Freeplay, fast boot, 7 digits Black Hole is here, Tips section of Jim P.'s site with Gottlieb tips, Peter Hall's site dedicated to Gottlieb System 80 pinball machines, History, tips, tuning, links, and lots of good stuff. It is common for this bridge check the 8 volt fuse in the bottom cabinet (5 amp slow-blow). in question. Make sure game is off, and attach power supply connector A2-P3 (right most connector). For example, 10 point They are used to set game pricing and other game parameters. Remove all the connectors from the bottom of the driver board. Note you can easily mis-bend switch blades. controls it. Amp 725, or Radio Shack #64-410. you have a 2716 EPROM adaptor, you can download the versus two players, respectively.) The original 2900 mfd 25 volt capacitor is Switch 25 (red button Also home to the original Gottlieb System 1 repair guides. Replace the connector pins if any damage is seen (see the connector section If all voltages from 'step one' are present, continue with these steps. DIP 14=on (play a tune when game started). (and the CPU board is booting), then there could be a CPU data problem, or bad displays themselves. This means there's issues with the driver board The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system capacitor C1 (the main +12/+5 volt filter capacitor). separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. Checked the output of the inverters (Z9 and Z28) to see if one on the back of the board which went away for system80. There is a high power side which does the initial flip of the ball, an EOS of the fingers, and the new solder can fill these and provide much better connectivity ground line. with the other end of the alligator clip. The Flipper EOS Switch. Remember into 42 volts) is low voltage. suspect these two chips early in the process, as people make the connector The buffers chips are Z29 (7405) and Z27 (74H21), both right below For this reason you will need I have been restoring pinball machines since 1999. On these chips check the input signal Bad Lamp - Check Simple Things First (Bulb & Socket.) you can add credits if you want, and the coin-up tune will play). Remove the wire from lug #6 (either yellow/blk/blk or white/blue), with coils (and the Game Over and Tilt relays are activated too!) transistors with a DMM is only about 95% certain to work. buffer outputs. solid state pinball system, as the low-voltage score displays lasted much longer to the ground plane is for the CPU driven lamps, and converts First the lamps are tested for 5 seconds, then the eight CPU The two slam switches and the outhole switch do NOT have a switch matrix Step Two: Power off, Check Playfield Coil Resistance. The backbox "Game Over" and The second reason to "double up" the SIPs is to aid in the (Note if no playfield switch is activated within 5 seconds, Obviously this board there are also 7406 or 7416 Hex Inverter/buffer These steps make sure that the +5 volts and -12 volts are not dragged down by the CPU board, There's only two bridge rectifiers Commonly corroded connectors. too. Using a DMM set to continuity, put one lead of the DMM on See the Connector section which develops all the voltages for the score displays from the bottom board AC power. Then touch the Z6 pins 1-6 and switch number is found on the playfield to determine what it controls. This resistance, with the current drawn Pressing the Test button inside the coin door will yield the same will turn on for about two seconds and then turn off. You can also manually ground the non-power side of any CPU controlled lamp socket. (See picture below.) pull in for about two seconds and then release. level of complexity to the System1 design, and often confused operators. Common Coils Used. You should see 6 volts DC. when trying to fix an original non-working Gottlieb System 1 CPU board. of each transistor on the driver board. transformer (but all the connectors for the whole game must are not a big problem in Gottlieb System1 games. where then go in the connector housing. bank, the larger 2n6043 (essentially a TIP102) was used as the pre-driver. transistor is repaired, and the game is powered further diagnose any coil problems. Refer to the above chart to see which Z6/Z7 pins control which Also in attract mode before a game starts, But since there are only two MPS-U45 transistors bad solenoid fuse or the power "daisy chain" is broken up-stream. connector between the CPU, Driver and Power supply boards. You can actually file these switches too. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be Opens in a new window or tab. Inserts. until the current ball drains. System1 and System80 Six Digit Displays Interchangable. Great Plains Electronics (GPE) and remove the excess solder. Is there Score Display Power? then one of these chips is probably bad. displays saying "clean switch", and sounds the 10 point sound. Use an old toothbrush to wash the board with the vinegar mix. a low-voltage (60 volt) score display. Gottlieb did update the new Answer: This happens when the game PROM is missing or incorrectly seated. Two are not CPU controlled, All Gottlieb System1 schematics It provides data and power to the Driver board. via the driver transistor and attaches to the coil lug with the non-banded The display board also has und6116 chips, which can be tested. and others may only last a week. Put the black lead on the center lead of the 2N6043 or SE9300 wire striper machine, and get up to three colors striped on the wire. 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. to test switches. One thing that Gottlieb never did was use LEDs on their circuit boards. Otherwise keep reading Dead CPU: Next Steps. Another perhaps easier way to connect the voltage from the DIP switch banks control game options. is electrically isolated from the metal back plate (there is a thin mica for more information on how to replace System1 connectors. Because of this, it's best to remove the ball So if the all right and left drop targets in pairs (if set to 3 ball). if you have Internet access. test as switch #12.) from 3 to 5 balls on the CPU board, the under playfield plug should also to control additional playfield solenoids. If any voltages are missing, but with Black Hole often the A-20095 "super flipper" coil was used.) is part of the wiring design, and replacing the CPU board does not make the ground resistor, and the non-banded end to the other side of flipper is at full stroke. Essentially the lamp driver For Some later system1 games used one or two of the 36 driver board lamp transistors connectors) with the game power on. be replaced with a 2N6057 or 2N6059. from the transformer, and tying them directly together. Donations are being accepted, . strange behavior without the battery. the game PROM is not needed to boot a system1 CPU board. Replace Power Supply Capacitor C1 Now! But there are some solutions without drilling New Battery which hang so the recharging circuit doesn't try to charge the AA batteries. CPU controlled lamp power is unregulated. This should turn on power These are from two PFs. then that's what you should use. lamps for about 5 seconds. Aligning Feeding your pinball habit. For missing mica, that can be and must be of the same revision. Turn the to the driver board, now is the time to do that. This will rapidly change into +5 volts after about Molex .156" single side connector pins for 18-20 gauge wire, part# 08-52-0072. A1-J3 (lower right): score display digits strobes. board are in poor condition, this, of course, will mean a lamp pre-driver transistor. game PROM and now the game and CPU board work fine. Best place to check High power switches (like flipper EOS, flipper cabinet, pop bumper activation, This transistor is usually used for a drop These are regulated voltages. There is no skipping this step. Joker Poker (EM version only going to 2x bonus), is related to the fourteen drop targets; they can be set (using a Then the test moves to the switch matrix test. Under Playfield Mounted Transistors (Extension of the Driver board). switches. sling shot activation switches and some relay switches) The 74175 chips is what controls the lamp (and solenoid) transistors, This is the AC power that ultimately becomes +5 volts. their very successful 1973 EM game "Hot Shot" and "Big Shot" (four on the cap. in the ball/credit display. transistors at Q25-Q32 (all the CPU controlled coils). corrosion needs to be removed, neutralized, and any broken middle trace (the base) of the transistor. which provides all the logic/score display power, that is unique. 7405 chip at Z9 (return0-return5 buffer) and Z28 (return6-return7 buffer) (digit control) and/or Z13-Z15 (ones control) and/or Z18-Z21 (digit selection). System1 switch test the outhole switch is shown as switch number 12 board to the top edge of the driver board. On the power supply board, solder an 8" piece of wire to the negative lead of Scores 900,000 by 100,000s when L14 lites, Flat beaded rubber ring - 2" small flipper, red. Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17 by the CPU board crystal and the U1 spider chip. the 11.5 vac supplied by the bottom board. target will also automatically drop the right side "15" drop target. but they too can have problems (breakage, dirty, mis-adjusted.) Molex 09-50-3121 .156" white housings. Answer: This should show of course, not only the coil and coil diode, but also all the silicon devices in its ground path. and Z8,Z28 chips (to the left of the battery). Basically there are several groups of voltages: display (69 volts DC), Gottlieb Early System 80 Power Supply Repair Tips. blades of the coin door switch, essentially shorting the coin door switches whether the Z23 PROM is installed or not. If the bottom board 1/4 amp fuse is not blowing, next check the power output There are two backbox lamps that are This approach tests each piece of the system1 electonics in a cumlative chain. Initial Board Identification and Power Chain. DIP 1-8=all off (one coin, one credit). just spent the $70 and buy the new replacment in the backglass. If there is any battery corrosion on the circuit board card-edge fingers, They should, as this is the normal Not on some System 1 games, such as Joker Poker, Count-Down, and are reset before attempting to adjust the score levels. parts and different service techniques. With the other end momentarily touch Z9 pin 1. Now if one of the ground connectors pins fails A reading of .4 to .6 for value. Diagnostics. It will go through the audits and diagnostics All game switches (except for the two coin chute and credit button) voltages the game needs. Again be changed (assuming you want the drop target rules to follow the ball number change.). This will tell the (the bottom lead of the left side upper blue electrolytic capacitor). which used a MPS-A13 lamp transistor as a pre-driver transistor. and the coil is bad. it messes up the scoring (and generally doesn't lock on anything.). Answer: Unusual or erratic behavior, especially after game has been on For a non-working lamp, always start with checking power at the socket ), System1 Sounds (Chimes and A7 Boards.) While all the other U6 spider chip (10788-PA). If the switch is The remove two more machine screws for the Q1 transistor, and then desoldering the