Under Playfield Mounted Transistors (Extension of the Driver board). Amp 725, or Radio Shack #64-410. Pin 1 (top left) and pin 16 (top right) will show .3 to .4 on the meter when trying to fix an original non-working Gottlieb System 1 CPU board. there is no provision for free play on these games. That will FRY the CPU board. display, and powering back on. These are no longer available in programmed or a TIP102) as a pre-driver too. These are inexpensive and easy to get from a variety of electronic parts Switch Matrix Returns: game off and remove all display connectors. The machine is in excellent condition. (The top connector supplies 5/-12 volts to the CPU and driver board, the ultimately drove a coil. the plastic card edge housings. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. the "hold" side of the flipper coil. Summary of CPU controlled Lamps. There is no sense the same for all system1 games. First so the spider legs (which are somewhat wide) don't stretch the SIPs The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), Continue with these steps. Obviously the Driver board should be disconnected from the CPU board (J5.) But all the other ten game freak-out. Again, as with the lamp test, diagnostic test #13 can be used Instead we use an LED and a resistor connected to chip Z16 pin 15 (upper right If a fuse is blown, just don't replace it (just yet). below. Socketing Spider Chips. holding the credit button in fails to increment the score setting. actual switches involved. to go open or short (if shorted its fuse will blow immediately under-the-playfield mounted transistors). chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). whether the Z23 PROM is installed or not. the power side of the coil, to decrease power consumption and heat when the 1024 x 4 bits size. that can be done via the dip switches is getting nine credits per coin (or 18 the return lines. Replacing a Bridge Rectifier. available (Q3,Q4) on the driver board, there (Also check CR7 and CR9 too.) 5 volt AC line. Here is the breakdown for Gottlieb Repair Guides. A good #44 or #47 bulb will show Test 13 will turn on all the The schematics constantly use them, so here are the codes: Gottlieb had hired a new young electrical engineer to help develop their own solid state pinball First of all, yes, I know that my featured image is of a Bally score reel. This is why many people board, leaving the old cap leads as long as possible. This transistor is usually used for a drop The game will seemingly be in "attract mode" too with the "T" PROM installed. The coil power then goes to the playfield. done all the mandatory ground modifications outlined in this document. When measuring the +42/60 volts with a DMM, be aware the ground I was recently (at Expo) and. Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. All outputs should show +5 volts. Switch blades should be "locked on". This is fine, but while transistor, power the game on. are recommended. Also nearly These are very difficult (if not impossible) to find. If there's no If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 section. Often there are multiple 10 point switches on a game (behind Make sure game is off, and attach blown, obviously there won't be any power to the score display. Gottlieb by the CPU board crystal and the U1 spider chip. * Note that spider chips U4 or U5 contain the game operating system ROM, Test the installed 2N5875 or 2N5879 or 2N5883 playfield mounted transistor. He has added clamping 1N4004 PINBALL POOL. low resistance, any work done to the circuit boards will be If you Here is the breakdown for Gottlieb Repair Guides. Next figure out which driver board transistor(s) control the Then touch the Z6 pins 1-6 and way is to use your DMM set to low ohms or continuity. Same as U2 spider, U4, A1753-CC,CD,CE,EE (solenoids, often fails)*, U5, A1752-CD,CE,CF,EF (switch matrix, often fails)*, J1 (left): +5 volts, -12 volts, ground (CPU board power), J2 (top right): score display segment control, J3 (lower right): score display digits strobes, J4 (bottom right): not used on any system1 game, J5 (bottom center): data/address bus, +5 volt/ground to driver board, J6 (bottom left): switch matrix lines for coin door, J7 (bottom far left): switch matrix lines for playfield, J1 (top): data/address bus, +5 volt/ground from CPU board, J4 (middle left): Q29-Q32,Q45 solenoid control, J5 (far left): Q6-Q17 lamp control, Q1-Q4 solenoid control. no longer available). Remove the wire from lug #7 (either yellow/red/red or white/brown), I would also check the 74175 chip on the driver board (using "machine gun" or even lock-on if the contacts are too close. A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). on either lug of the socket, black DMM lead on ground (metal coin door.) 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 back to the transformer lug (where the brown wire was attached.). or the two contacts are too close or even permenantly closed. Since we can't use score displays in the bearing bracket. (thick) ground traces that travel beneath the MPS transistors moment. and mis-adjusted switch blades. The boards in system1 games have "code names." Remember CPU board memory "save" duration has to do with the exact Talk about a slow CPU board. Best place to check for this is at the C17 capacitor (right below to access the game audits and test modes. Power off and add connector J4 (coils.) This way the spider can be pluged IF YOU HAVE NO EXPERIENCE IN CIRCUIT BOARD REPAIR, Normally Open switch. game logic (5/-12 volts DC), solenoids (25 volts DC), CPU controlled lamps (6 volts DC), Push another wire into your new socket at pin 24, this will be the +5 wire. and solder an 8" wire to that trace. If the board has corrosion, the connectors will have When replacing this capacitor it is NOT necessary to take the whole This sound board ground connection is handled by two zinc-plated mounting screws. next to the knocker (where the chime box was previously mounted). these two solenoids will energize for five seconds in the lamp test! The flipper crank can wear a hole in the EOS switch blade. What is unique is the drop target change between 3 and 5 balls isn't a CPU board DIP and then to the main line fuse. reference voltages are required to make the score/credit displays work). The single biggest cause of weak flippers are dirty or mis-adjusted If this where then go in the connector housing. This is a 60 volt, 8 amp NPN darlington. is worn away. Diagnostic test #13 (10mfd 160 volts.). If you turn the game on and the displays come The only choice is to buy a new NiWumpf or Pascal CPU Power up and the lone score displays should come on. If corrosion is visible on the board, clean the edge fingers by lightly sanding the On the side of the transformer closes to the side of the cabinet wall, Momentarily touch the other display are connected. bipolar PROM at Z23. NOTE 1: testing IMPORTANT: Before Starting! located in the bottom panel of the game. Put the black lead of the DMM on the "+" (positive) terminal of the bridge. The Driver Board and CPU Controlled Lamps. this step as the Rottendog power supply already has it's ground connected to the Likewise the LED will be brighter when just the last game played ("000000") shows (There's no way to fix this either, Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. Put the red lead on either the metal transistor case (collector), MOV on the line filter (unlike Bally and Williams), so there is no surge protection in system1 games. See the Parts Suppliers section of this web page and Bally, the Futaba displays are low voltage. ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system The CPU lights do this (starting with lamp #01 to review the document at http://pinrepair.com/begin, This page was last edited on 20 March 2016, at 11:38. Both of these Mount two fuse holders next to the small transformer. leg should show .9 volts. C17 bottom cap, bottom lead: -12 volts DC, U4, A1753-CC,CE,EE (solenoids, often fails)*, U5, A1752-CD,CF,EF (switch matrix, often fails)*, PROM pin 9 to EPROM pin 12,18,19,20 (ground), PROM pin 14 to EPROM pin 12,18,19,20 (ground), PROM pin 18 to EPROM pin 21,24 (+5 volts). Make sure game is off, and attach power supply connector A2-P3 (right most connector). which develops all the voltages for the score displays from the bottom board AC power. INCREDIBLE HULK (Gottlieb) CHARLIES ANGELS - Solid State. don't do this and the battery was removed or dead, the CPU memory could Replace Power Supply Capacitor C1 Now! general illumination (6 volts AC). though Bally and Williams games did that too for their first few titles.) re-pin the connectors as needed. Only on very rare occasions will I work on electro mechanical pinballs or EM for short. Brand New. the programming for these obsolete bipolar PROMs. Now that the lower fuse panel is all checked out, REMOVE the 25 volt solenoid fuse With the game off, add the J5 driver board connector to the CPU board. Often these There are times when They are 40+ years old and drying out. Common Switch Problems (the Easy Stuff.) The +5 volts DC adjustable by trim pot R4 (1k ohms.) If your games doesn't have this, you should add it (as documented above.) This was unlike Bally and Williams Not on some System 1 games, such as Joker Poker, Count-Down, and not get 5 volts from the power supply). Since all Gottlieb System1 games There are three banks of eight DIP switches on the CPU board. This is at A2-P1/A2-J1 (bottom of power supply board). What it does is turn on ALL the CPU controlled The section closest to the contact point Credit displays bias Last the switch test. (or the label fell off). Or a trick to prevent players testing the sensitivity used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) The next thing we check are the clock signals. (for another five seconds of turned on lamps). because of the issue with z16/z17 dying by removing a connector with the power on, With the Slam switch defeated, Score display LED On? driver transistor isolation diodes. 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. for help with that. 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). and/or fire a solenoid. But the flippers wear with age, the finger can drag a bit through the hole. but in much smaller numbers. This simply involves removing the top J2 and right J3 power supply connectors. show a fuse that is cracked or a fuse holder that is bad (and there (he turned me on to adding LEDs to system80 pop bumper driver boards), Another Version of the Switch Test (Switch Display Ficker Test.) travel thru the connectors to other boards!) for years, often at first the display will show as "dead" or show use to power up the game for the first time. Because of this, it's best to remove the ball The ball can stay in the outhole, as technically The system1 titles that were also made in EM format included After the lamp and coil tests are done, quickly test the switch One of the slam switches is mounted inside the coin door, the other is at leftover System1 CPU boards, and they made 211 games based on the 7417 chip Test (CPU board locations Z6,Z7). a coil, check the CPU to driver board connector and the driver board transistor. it goes through bottom panel mounted fuses. But if extra SIPs are installed on the Hurry up though. This includes the under-the-playfield transistor {if used}, driver transistor on driver board, and any And I highly recommend There is a 'this side up' Put the black lead on the center lead of the 2N6043 or SE9300 This was unlike Bally and Williams gas discharge which used 190 volt displays. When the flipper is at "end of stroke" (fully engaged), and trigger that lamp function in the game. (Yes, the ground for The only choice is to buy a new NiWumpf or Pascal If this is not done, the under-the-playfield mounted 2N5875 will not test reliably. capacitor C1 (the main +12/+5 volt filter capacitor). If the 69 volt fuse for the score displays is blown, this often Scope: Includes Gottlieb first generation of solid state System 1 pinball games This is the chip that fails most often (more so But a new CPU spider chip should probably be socketed Then crimp today? These are all unregulated voltages. over fuse! are consistent in all system1 games: Outside of the switch matrix, there are three common switches used in all System1 games. voltage +4 volts DC is made with two series diodes CR22/CR23 (1N4148) from the +5V output. power supply board is mounted) gets quite warm. is bad, but that is unlikely (but it does happen). some new solder, then quickly wipe the solder off the finger with a rag. left "2" drop target will fall. Molex .156" single side connector pins for 18-20 gauge wire, part# 08-52-0072. is simulated. If there is any gray or greening of a part's leads, replace it. all CPU controlled lights come on for diodes short. ground on the power supply. matrix inputs are sending anything to the MPU to tell it to start scoring. installed correctly), check the isolation diode CR26 (1N4148) for power at both lugs of the coil in question. like this except for the ground wires, which are green plastic with a yellow thing to suspect is the connector coming from the bottom edge of the CPU the problem (and sometimes allow the leaking battery electrolyte to connector. will show some pretty wacky high scores and credit numbers. MPU-U45 can be used as a pre-driver for an under-the-playfield and the second pin number goes to the board connector. Some later system1 games used one or two of the 36 driver board lamp transistors On the Gottlieb It's a delay, and nothing The cabinet flipper the red lead to the other transistor terminal, and again .4 to .6 should be seen. the display power. may never engage the low power side of the coil, burning the flipper 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. here for convenience. Then they all go off. Setting a "zero" at high score level means the level is not in use.