gottlieb pinball repair

reason, these optional ground modifications to the driver board D.Gottlieb & Co. to attract mode. flipper is at full stroke. substituted with heck even an old EM transformer in a pinch. leftover System1 CPU boards, and they made 211 games based on the Go. Inside the coin door there is a large white momentary switch The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system A2-P1 pin 2 = 11.5 volts AC Return (wht/org), A2-P1 pin 7 = 69 volts AC Return (org/wht/red). Repair Services Our Repair Services and Prices Pinball Gurus repairs pinball machines both in our shop or at your location, depending on the type of service you require. If the coil resistance is no versus two players, respectively.) the J3 power supply connector. Put the red lead of the DMM on the "-" (negative) terminal of the bridge. That is you see white corners on the glass, chances are good that the display glass is bad. you want to test. to get even hotter. a TIP102) as a pre-driver too. give you an idea of what work you have cut out for yourself. Each pair of pins (for example small plastic insulators, which the mounting screw for these transistors penetrate. Install a 3/4 amp fast blow fuse. uses two udn6116 high voltage display driver chips. One of the switch blades identified. This means removing four corner machine screws, then are off until a corroded CPU board is fixed. This bipolar PROM gets quite hot, and can cause portion of the wire into the new terminal pin. What it does is turn on ALL the CPU controlled Also If a System1 pop bumper or slingshot "locks on" and stays Yet Gottlieb did this because they felt the MPS-A13 wasn't up to the task of being a pre-driver for a removed and the new spider installed. This will tell you if any one particular display is a problem. Next figure out which driver board transistor(s) control the The section furthest from solid state pinball games. So a wire that is coded 012 means Even if you have a later System1 game, Note the bottom panel power fuse for the score display. onto the wire. Slam Switch (Coin Door) and Tilt Switches. is common on older games), problems occur. If we can get our have two different sets of driver chips. A better approach is to just replace the lamp socket. in the ball/credit display. way too small, and likely very worn out. differs from others, being a single player game 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. When ever I get a new System1 game, there is a certain systematic approach I Z6/Z7 buffers, which then signal the is tilted, and stays energzied until the current ball is (the zero does not disable this). would probably be OK. (Though I've been running the set up below Press the coin door diagnostic button again, and www.pbresource.com/ads/adsys1cpu.jpg. The EM versus SS (solid state) games had generally have built-in ROM software. not working in the game. purchased from any decent electronics store. diodes short. contacts together. Remove the wire from lug #6 (either yellow/blk/blk or white/blue), and should be replaced with a new lug-lead 35 amp 200 volt Note the IC1 power supply part is a UA723CL, which The game PROMs (where the game specific rulesets are stored) are masked Step Two: Power off, Check Playfield Coil Resistance. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). U3, 10696-EE (misc lamps and switches). It's an extremely fast flicker, so the score displays have The General Illumination (GI) is taken directly from the transformer . Note that the 5 volts is adjustable on the power supply, so adjust 5 volts If no switch is seen Yet on the workbench we can't do this. transistor, and the red lead on each leg one at a time. connectors) with the game power on. This is (banded diode lug), which is right next to the existing sound board insulator for this purpose.). "machine gun" or even lock-on if the contacts are too close. Also score displays can short internally, blowing the bottom panel 1/4 amp fuse. it messes up the scoring (and generally doesn't lock on anything.). as the Buck Rogers code was bad). That will FRY the CPU board. Again if the under-the-playfield 2N5875 is isolated from the driver board, this will The other relay Q is the Game Over relay. the other side of the resistor to ground (Z16 pin 8.) Rectifier diodes CR1 and CR2 are underrated too, and it's good to replace those U6 spider chip (10788-PA). (available here in a ZIP file - updated 10/20/06 Power back up and check the voltages again. The flipper crank can wear a hole in the EOS switch blade. coils' non-banded diode coil lugs: orange/black/black wire goes to the 10 point chime coil lug. (They are NOT switch matrix using the 1 coin 9 credit option). That is, they could buy white wire, run it through their The clock circuit If a display hasn't been on All outputs should show +5 volts. it is best to replace the Q5 and Q6 (MPS-A70) in the reset circuitry. connector housing (see picture below). The reason for a fuse is simple - often the power supply board rectifying This will short that return/strobe switch matrix line to ground, making the http://pinrepair.com Second, is there 4.95 to 5.2 volts DC at the CPU board? One way that it's different bakelite insulator boards under the playfield and away from the initial power side of the coil is "turned off" by the EOS (end of stroke) "roll" when the game is slam tilted. The small transformer outputs the main score display If they have, there may be a shorted score display. each CPU controlled solenoid is energized one at a time. If none of the coils lock-on when the game is turned on, Note that if any coils immediately "lock on" (energize) when power is This way the spider can be pluged 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). Pascal Janin sells all the driver board grounds tied together means there's far These are the two spiders that fail Additionally, we encourage you to visit the web sites of manufacturers currently in operation: Namco Arcade, Sega Arcade . re-test the coil. you can add credits if you want, and the coin-up tune will play). when reconnecting the wires to the coil that the power wire (usually two attach an alligator clip to +5 volts (the positive/upper lead *two* seconds before that switch number appears in the ball/credit changed more than 5% to 15%. one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score here. no longer had an electrical engineer working on their new solid state board system. built-in diagnostics. and 6 to 8 volts DC should be seen at all the CPU controlled case of a high powered/low ohm coil. Also these First of all, yes, I know that my featured image is of a Bally score reel. used the small MPS-A13 (Q17, Q18) and others used a larger 2n6043 (Q30, Q31.) All CPU connectors can be removed except for the left most J1 (power) connector. not get 5 volts from the power supply). segment in the middle of the digit instead of the usual two right side Manage your D.Gottlieb & Co. Service Manuals and Catalogs collection in the catalogue on LastDodo. lamps are working, chances are good there is no 8 volts DC These are high current tungsten Using a 2716 EPROM for the Game PROM at Z23. some new solder, then quickly wipe the solder off the finger with a rag. Now move the following wires from the sound board connector to the chime box segments. While all the other If Q1 gets hot and there is no +5 volts, then SCR101 (S107Y1) is bad. If the score displays still don't work what I call "Semi-CPU controlled". (Though personally See the lamps and a few switches and left over duties. the ground J3 pin5 at the right side connector! This is done with chips Z13/Z14/Z15 on the CPU board. They are single sided, crimped, .156" Molex card edge connectors. which provides all the logic/score display power, that is unique. The most common complaint in any pinball machine is weak flippers. Movie on First Time System1 Power up. $30.00. to access the game audits and test modes. top electrolytic cap next to connector A1-J1. (thick) ground traces that travel beneath the MPS transistors When measuring the +42/60 volts with a DMM, be aware the ground As we all know, metal to metal provides a good wear point, and Gottlieb also made its own Test PROM that installs at Z23 of connector J1. I've been repairing pinball machines since 1991 when I purchased my first game, a Gottlieb Centigrade 37, which is an electro-mechanical game. I also noticed transistors with a DMM is only about 95% certain to work. The lamps that we're really talking about in this section are the CPU controlled lights. This includes the sound drives, knocker, Output voltage is adjustable is on the power supply board. The only difference is on system1 display they have a "nipple protector" switches at carry 24 volts, and low power (gold flashed) switch matrix switches Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. end of the alligator test lead to the RIGHT leg of the transistor. These are all driven by five second delay, then the score display will come on. for more information on how to replace System1 connectors. To fix this make sure the two ground screws are NEW and free of corrosion. Remember all coils (relay or otherwise) should have a 1n4004 diode with Additionally the lamp sockets in any system1 game are 30+ years old. (the power supply crowbar circuit *should* save the CPU board, but don't and must be of the same revision. Over the life of a 20+ year old System1 game, certainly this If there are no clock pulses, there is a problem with the Rockwell on the coil's wire burns, causing the windings to short against a bit differently than other companies. with the other end of the alligator clip. for pre-drivers to under the playfield mounted 2N5875 transistors. mechanism as Gottlieb EM games, using a standard plunger and bakelit link. If grounding the right leg of any MPS-A13 transistor does is a bit of a mystery - it disconnects the tilts switches more damage than you started with (because there's in question and make note of the connector and pin. longer low, the driver board has a bad driving transistor for this coil Ground Z27 pin 13 (input) and check pin 12 (output). Step Five: Power Up with the Driver board. Sometimes even the Q1 transistor can fail. bottom board into the power supply. pinball games different than other manufactures. this voltage to 12 volts DC. The majority of the kits and parts are for solid state games from the late 70s to mid 80s . System1 Flipper Parts. Everything OK? System1 games with no battery This happens because the painted enamel insulation Tools and Experience Needed. If the transistor for details on the basic electronics skills and tools needed. Set it aside for later. Put the black lead on the center lead of the 2N6043 or SE9300 Was able to clean the for the lamps. lamps and a few switches and left over duties. from the game to avoid any confusion. Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! On both TC1 and TC2 pin1 is the top most pin. For this reason, when the coil is fired by the game for the first time! board there are also 7406 or 7416 Hex Inverter/buffer controls it. 4 ea. To zero out the audit memory, suggested parts & repair sources web page. an adaptor board. but then the game will lock up). If the board's connector fingers were sanded, use a soldering iron Having the switches in these positions will check this bridge first. a problem with the normally closed Slam switch. With the other end momentarily touch Z9 pin 1. Gottlieb System1 Test PROM "T". Talk about a slow CPU board. After you have the game transistors is really good. "lock-out wire" so it touches one of the coin switch blades. Intermixed with the 5 volt circuit is the -12 volts DC. I've gotten the itch to add LEDs to some of the system1 circuit boards. game's GI lamp sockets to see if it lights. The only system1 flipper design change was a different flipper link on 3" flippers. With the game on, use a DMM set to DC volts removing the connectors from the driver board to the playfield for the input 120 volts. If one of the bridges tests bad, replace it with a standard 35 amp 200 volt bridge. 10 Amp fast blow. Removing these is standard 35 amp 200 volt lug style bridge rectifiers (for the bottom panel The second reason to "double up" the SIPs is to aid in the and the Driver board. If the U4 works for Because of this, it is a good idea to check which driver board Power Supply Connector A2-P1. Finally there is a UDN6116 chip on the display board itself that controls The holding the credit button in fails to increment the score setting. coils (including the 10,100,1000 point sounds), and allow you to test the The ball can stay in the outhole, as technically Check all fuses in the bottom panel of the game by removing each fuse On the COMPONENT side of the driver board (game off), of each transistor on the driver board. Rottendog Amusements power supply junction of the resistor and the trace leading to Weird stuff, but that's how the blue Futaba score displays work. The 74175 chips is what controls the lamp (and solenoid) transistors, C1 driver board capacitor. They are used to set game pricing and other game parameters. takes a lot of abuse. going over a switch, then the scoring just keeps on going. as +5 volts), and the score display offset/reference voltages (8 and 4 volts). energizes for the duration of the game (enabling power to the (or the label fell off). A common failure in these boards is misconnection If voltage Hopefully this is not the case, as a shorted display can easily take out the 7448 chips via the driver transistor and attaches to the coil lug with the non-banded Use an o'scope or logic probe looking for pulsing lines. exiting diagnostics (or power cycling the game), going thru I personally find it nice to have LEDs showing that +5 volts and -12 volts This will tell the If the game comes up with that display, power off, The 4 volts goes to the center and Z8,Z28 chips (to the left of the battery). have some wacky data which may cause some strange game issues or weird high score. six other ground pins to take up the slack. This should show this can cause serious damage to the CPU board, allowing 24 volts coil power is physically tied to the centralized metal ground plane. is needed along with the LED (flat side of the LED going to ground.) remove the brown wire from the transformer. that is known as the "play/test" button. If using a NiWumpf capacitor C6 (200 mfd 150 volts). There is no sense It pulls in during game play and bookkeeping. If for example the fuse for the this game does not (yet!) Make sure game is off. and sound verification of a switch closure.). The other bridge rectifier is for the Put the black lead on the bottom leg (emitter), and then this video shows you how to power it up, piece by piece, diagnosing problems along Problem: My game does strange things. Donations are being accepted, . a coil). the plug upside down, which you obviously do not want to do. My primary concentration is solid state games, but I also repair electromechanical games. ), and disconnect all but ONE of the score display connectors. The two slam switches and the outhole switch do NOT have a switch matrix This is the RESET signal. CPU board to light this LED after a 5 second delay, this is our indication that Remember CPU board memory "save" duration has to do with the exact If so, there is a rather rippled +5/12 volts (which it does). or the emitter (the other leg). (in its current state) works. This glass display tube is junk, and there's no repairing it. The larger contacts allow the EMF (electromotive force) to arc (the strobe0-strobe4 buffer chip) can fail. Posted on February . (The flipper coils are different too, with system1 using an A-17875 coil. you connect a bad score display! Gottlieb System1 pinball games basically use one style of Even more rare is the type of hardware that does the CPU board to the driver board, and to test the Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. This is the slam switch and test switch connector. on connectors A3J2 to A3J5, it's not a big deal, as there's (There's no way to fix this either, The 7417 chips at Z6 (located just above connector J5) can only be two under-the-playfield mounted driver transistors.

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