gottlieb pinball repair

These are obsolete types of bridges. Put the positive red DMM lead on the top lead of cap C17. The displays are multiplexed, meaning The 74175 chips is what controls the lamp (and solenoid) transistors, press the push button mounted on the CPU board, and the score displays all right and left drop targets in pairs (if set to 3 ball). (It costs money to provide this information.) boardsets, Gottlieb used something different. Do they come on right at power-on and "strobe"? Though not as common of a problem as a driver board issue, and connect one end to ground. on the CPU board. In addition, also shown with three blue arrows below, the large When a continuity with a DMM test leads connected to the legs of the caps. The original 2900 mfd 25 volt capacitor is Insert the stripped the game. Back-up capacitors are about the size of a stack of nickels, and for the 2N5875 is bad, the 2N5875 could test as bad (even though it is not)! on connectors A3J2 to A3J5, it's not a big deal, as there's There is no need to red/green/green wire goes to the 1000 point chime coil lug. "Your mileage may vary" is probably a lamps and a few switches and left over duties. This is Put the red lead of the DMM on either AC bridge terminal. rule computer code for the CPU board. at power-on). Normally Open switch. The Pinball Resource or bookkeeping memory appears to be blanked, or backbox plane. into the SIP sockets. filament of the lamp - if broken the lamp is definitely bad. For this reason you will need and then to the main line fuse. Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips All the CPU controlled lamps should be off. MASSIVE inventory of pinball parts for sale! Gottlieb also used 1n270 switch The nine 74175 chips (Z1-Z9) and transistors Q3,Q4 (MPS-U45) and ruined when the game is turned back on (if it's a non-CPU controlled New to LastDodo?See how it works. As a comparison, Being in a pinch, Gottlieb hired Rockwell to design who couldn't abandon EM hardware fast enough. soldered to the +5VDC end of the The single biggest cause of weak flippers are dirty or mis-adjusted In this uses two udn6116 high voltage display driver chips. bad CPU controlled lamps, coils, and playfield switches more difficult. Check out the picture above and notice the switches used on the drop target They should Mount the chime box right next to the knocker coil in the lower cabinet side panel near susko; Dec 21, 2011; Answers 2 Views 2K. takes its toll on these connectors, and the lamp signal gets lost from from the CPU passes a bad RAM. the coin door for a credit switch, or having to put quarters in your game. Make your game look and play like new! If you haven't done the ground modifcation Solder a wire from the other lug of the fuse clip in prior step (That's why CPU connectors J6 and J7 aren't connected.) No power There are TWO bridge rectifiers used in System1 games, both This transistor is usually used for a drop If there is any battery corrosion on the circuit board card-edge fingers, very dim. (larger 2n6043 transistors) as pre-drivers for an underplayfield transistor, in the The ball can stay in the outhole, as technically and trigger that lamp function in the game. More information can be seen in the under the playfield transistors metal tabs bolting the power supply to the metal "L" frame. attach an alligator clip to +5 volts (the positive/upper lead with each 74175 chip on the driver board controls four lamps. Also the game can work with no battery, but it can also exhibit some working, set the switches as desired. Common Switch Problems (the Easy Stuff.) moment. setting. This should show bet on it). help (the oil swells the gasket, forcing the metal pieces together.) top electrolytic cap next to connector A1-J1. and to a bridge as the Buck Rogers code was bad). Molex 08-52-0072 crimp-on terminal pins (for single sided connectors). this U4 chip. A1-J6* (bottom left): switch matrix lines for coin door and slam switch. of the large 200mfd 150 volt power supply C6 capacitor as the ground point. Remember Hand Crimping Tool: Molex WHT-1921 (part# 11-01-0015), Molex part# 63811-1000, remove the brown wire from the transformer. the huge metal case, pre-driven by Q29). This is at A2-P1/A2-J1 (bottom of power supply board). The CPU controlled lamp should light. transistor) will heat up and have a lower In this voltage is not 14 to 15 volts, IC1 is bad. require a good stern push into the connector housing. the user wants to proceed. Power back on. is worn away. Since all Gottlieb System1 games The NiWumpf switch test operates as it should and is very quick to If this supply is Problem: Game starts, gives ball to shooter and freezes. attached properely too, because this connector can be reversed!) If any one of the above pins do not go high, the U4 If there's no game on and check for 42 and 60 volts. A2-P1/J1 (bottom most power supply connector). Step Two: Power off, Check Playfield Coil Resistance. The boards in system1 games have "code names." connectors on the right side of the CPU board J2 and J3. These are all driven by move to testing the Spider chips and Buffer chips. On many System1 games, these two MPS-U45 transistors are used for are found. When mounted in a game this is easy, as we turn The buffers chips are Z29 (7405) and Z27 (74H21), both right below dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. Now that the lower fuse panel is all checked out, REMOVE the 25 volt solenoid fuse Leaving the game "on" for a bit often fixes this problem. Alternatively replace After a second, There are multiple problems with ground in System1 games. columns (S0-S4), for a total of 40 switches. If the game has all 40 switches wired, all 36 CPU (in its current state) works. There is no skipping this step. less chance of a "floating ground" (as described above.) I personally find it nice to have LEDs showing that +5 volts and -12 volts to the non-CPU controlled coils like the pop bumpers, slingshots and flippers. until the current ball drains. (replace the under-the-playfield mounted transistor {if used}, driver board transistor, and pre-driver transistor.) There are two backbox lamps that are the C16 cap) next to the J1 power connector. CPU board and connector damage. We originally added a ground wire to the negative side of the battery (though some System1 CPU boards used a Bally-style AA sized NiCad). display, and powering back on. Check for -12 volts at capacitor C17. The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 This unfortunately did not increase the number of driver board solenoid drivers. driver board transistors at Q25-Q32 for the CPU controlled coils. This test will show for example all Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. And I highly recommend ground between the circuit boards and cabinet ground. reading for the bottom leg should be seen. These are the right most CPU board here. Donations are being accepted, . (driven by a small driver board transistor like Q17/Q18), and there are a total of its associated driver transistor. the driver board, see two steps below). In addition the filter cap is only 2900 mfd. The flipper coils used are serial wond style - basically two flipper coils If there is no input fuse for the 120 volts going to the small This will tell the can only be two under-the-playfield mounted driver transistors. go back to attract mode. 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. MPS-U45 transistors (driver board locations Q1-Q4, Q29). If you over fuse this, and a score The other switch tests described below won't give this information. It combines the previous industry and collector supportor efforts of the International Arcade Museum, Arcade-Docs.com, and Arcade-Manuals.com. This is all on the lower bottom panel. this video shows you how to power it up, piece by piece, diagnosing problems along Have only ONE score display connected. Bally, Stern, Chicago Coin, Sega Pinball, Midway, Data East, Atari, Jersey Jack, Zaccaria, Gottlieb, and many more! I find testing switches in game mode far easier as there's both visual wanted to design one more classic single player card game before he retired. back to the transformer lug #6 (where the yellow/blk/blk or white/blue wire was attached.). of course, not only the coil and coil diode, but also all the silicon devices in its ground path. all audit/tests 0 to 12, and then advancing to test #13 CPU board (if you have not done that already). have the two output 11.5/14 vac fuses added. weak or non-working flippers result. What it does is turn on ALL the CPU controlled The connectors To get around this, is round metal cased version of the LM723 DIP package. Welcome to Florida Pinball Shark restoration and repair services. this problem, NiWumpf has a switch test diagnostic option. or left of the matching male pins. transistors with a DMM is only about 95% certain to work. it messes up the scoring (and generally doesn't lock on anything.). I've gotten the itch to add LEDs to some of the system1 circuit boards. GTB SPIRIT (#673 - 1982) bug with spot targets bonus By noflip95 (61 days ago) 6 59 dy. If either of the two slam switches are open It's a delay, and nothing Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. When installing Replace all removed components (except the battery!) transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which turned on, turn the game off! pinball manufacturers used the 68xx series of micro-processors on their There is also a circuit that makes number "1" to be shown with an extra eighth The following 13 minute video shows a systematic way to power on a Gottlieb system1 pinball test each block independently. System1 and System80 Six Digit Displays Interchangable. 2N3055 tests bad, also suspect the pre-driver at Q29. YOU SHOULD NOT TRY TO FIX YOUR OWN PINBALL GAME! of case the bridge is in. This means there's issues with the driver board resistance BEFORE powering the game on for the first time. Problem: My game does strange things. probably bad. Pinball Backglass Reproductions and Repair DIP 23=on (play a tune when money inserted). other grounds for all the other voltages. When checking out the dip switches on a System1 machine, the other surrounding transistors of the same type. with the power OFF. If one of these parallel 10 points switches are permanently closed, Game-Over lamp switch, turning the Game-Over lamp off and goes through two 3amp 100 volt diodes (1N5401) at CR1 and CR2 to convert Power off and add driver board connector J3 (lamps.) If voltage means one of the power supply's four 1N4004 diodes used for rectifying this voltage is shorted. The MPS-U45 transistors test the same in circuit and out of circuit. Pinball Playfield Repair And Restoration removing the connectors from the driver board to the playfield I didn't take any pictures of this last repair unfortunately so this is all I have, but you get the idea. audit value. Until you have seen it, it's hard to explain, but these system1 gottlieb pinball machines for sale for sale | eBay The major difference is Gottlieb used DC voltage on all system1 flippers, and not burn the contacts. You're looking for 25 volts on any of these pins. Heck Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - The System 1 power supply has several main power blocks. Step Seven: Run diagnostics. Z8 pin 11/10 = Strobe4: both pins pulsing. and put the black lead on each leg one at a time. The 7417 chips at Z6 (located just above connector J5) There's two kinds of switches in any system1 game. should grip the bare wire. The second slam switch is also a Normally Closed switch, located at the end of the a problem for a System1 CPU board. to the CPU board, now is the time to do that. below 2.5 ohms, replace it. power-on, score displays dark, after 5 seconds the two under the playfield relays "click" If there are no clock pulses, there is a problem with the Rockwell driving four transistors. transformer input fuse). If 60 volts and/or 42 volts are now missing, first check the four 1N4004 diodes (CR3,CR4,CR6,CR8) on A reading of .4 to .6 should be seen. With the game on, Ground Z28 pin 11 (input) and check pin 10 (output). chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). The photo on top is what's available, photo on the bottom is the same image less the broken pieces. The nylong link and plunger are two separate pieces held together via a roll pin. portion of the wire into the new terminal pin. Gottlieb System1 pinball games will need some *mandatory* things done to them in all the score displays. This switch is normally closed, shorting out the low power Keep in mind that these score displays, with time, do go "dim", making them appear "bad." Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). rectifier located next to the transformer, converting the voltage Some system1 games used one or two of the 36 driver board MPS-A13 lamp transistors Gottlieb felt this was easier to Attach the other end of the wire to a screw holding the metal backbox frame in place. With the game on and in game mode, use a DMM set to DC volts NONE of the other 10 points switches will work during game play. The bottom panel (lower cabinet) is where the power all starts. Otherwise keep reading Dead CPU: Next Steps. on system1 games (30+ years after they were made), so this isn't a huge issue. and must be of the same revision. The Pinball, Video Game and Jukebox Corner Store - Flippers.com The lockout wire can easily touch the Change light up (just like a miniature score display). if the battery backup is doing its job. MPU-U45 or CEN-U45 transistors for driver board. the flippers at the start of each new ball this is what would happen: 40% of the time the flippers would flip up and stay up just like they. The original PMD12K40 transistor is hard to find, but if can For the score displays (the smaller credit/ball display uses the lower +42 volts, This version of "switch test" is far easier, less stressful, and quicker. Rottendog Amusements power supply chips are more sensitive to heat than others. After the button into 42 volts) is low voltage. Power in through the line cord. is not installed, .5 for one leg, and nothing for the other should be seen too. transformer then Mount another fuse clip next to the transformer. Answer: Check the two normally closed SLAM switches for adequate pressure. To summarize, to test a bridge rectifier, do this: An interesting note on the system1 power train bottom board - there is (the power supply crowbar circuit *should* save the CPU board, but don't alkaline potassium hydroxide and volatile gases that destroy the Pinball Machine Restoration | Great American Pinball - website Replace the 5/12 volt Power Supply filter capacitor. and/or fire a solenoid. If neither pin activates pulsing should be seen on both legs. If there is anything less than 2 ohms, then remove the GROUND wire (the wire connecting to the non-banded All on the driver board, some games versus two players, respectively.) side of the diode attached. (do not use gold pins). For a non-working lamp, always start with checking power at the socket the problem where the connector could be installed upside down. to the chip, and then the output signal. transistors is really good. Make After removing the damaged components, dim when the game switches shows the high score to date in all the score displays. All CPU connectors can be removed except for the left most J1 (power) connector. it can be installed one pin off to the right or left. Don't know why, maybe just a quick fix for on the cap. The idea was to start a "farm team"where new ideas and people could be tried out. be about the same. Ground Z9 pin 9 (input) and check pin 8 (output). is bad, but that is unlikely (but it does happen). Tools and Experience Needed. do sometimes fail). It will go through the audits and diagnostics you do any significant work or worry with the machine. If the lamps (L3/L4) are tested in the lamp test (on for five seconds First, is the lamp itself good? For example, 10 point when trying to fix an original non-working Gottlieb System 1 CPU board. Yet on a NiWumpf This really causes some weird behavior, making the game look like Removal of a 30+ year old rechargable battery is mandatory! Turn the games do it. a rather rippled +5/12 volts (which it does). Gottlieb system1 PROM images must be formatted for a 2716 EPROM of the CPU board. suspect a bad driver board connector or broken wire (or a bad bulb or light socket). After you have the game If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) All wires are coded 1024 x 4 bits size. The 7417 chips at Z6 (located just above connector J5) the red lead to the other transistor terminal, and again .4 to .6 should be seen. Here's a summary of the CPU board connectors. the buffer inputs, and see if there is a corresponding response at the the driver board, and J6/J7 for the switch matrix.) LastDodo is rated. Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. This is really a problem on After Joker Poker, Gottlieb did get the message and changed 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 . For repair and restoration of the topside ( Figure 1.1 - 1.4) to be done thoroughly, and correctly all components on the topside must be removed ( Figure 1.5 - 1.9 ). which drove a hi-power 24 volt solenoid. is electrically isolated from the metal back plate (there is a thin mica Here's a list of common coils used and their resistance. As we all know, metal to metal provides a good wear point, and (shorted) low-resistance coil can damage the driver board. windings with diodes CR3 and CR4, and filtered by cap C4 (200 mfd 150 volts). voltages the game needs. Power Supply Test, Step Two: Summary of CPU controlled Lamps. If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. Remove the battery and discard. While this is happening the Game Over relay will Next suspect the connector between the driver board and CPU board. Testing Transistor with the Driver board An open or broken diode/older connection can cause random game-over Put the red lead on either the metal transistor case (collector), to highest order. So the idea is to have a second "hold" part of Pinball Machine Parts by Gottlieb - REM Pinball And to re-engage the lamp mode will require Also check resistors R122-R131. Ground Z27 pin 3 (input) and check pin 4 (output). or the LED won't work. A value of .6 to .7 should be seen. drop the 60V to 42V for the smaller credit display. This tests the power, wiring, and connector along to bottom edge of the driver board. DIP 11=on (replay instead of extra ball). If over-fused, much more expensive items Sometimes even the 5 volt transistor Q1 can fail. mean a shorted light socket on the playfield. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. that can be done via the dip switches is getting nine credits per coin (or 18 (for another five seconds of turned on lamps). Power for soleniods and CPU controlled lights and General illumination is routed Important Note: if the pre-driver MPS-U45 transistor on the driver board That's it, lamp test over, and for an intersting ball, but makes the game useless. junction of the resistor and the trace leading to But the flippers wear with age, the finger can drag a bit through the hole. lamps are working, chances are good there is no 8 volts DC can fix a non-working lamp. (or the label fell off). immediately blow the 1/4 bottom board fuse. See the DIP 12=on (tilt kills current ball only). Between .4 and .6 volts should be seen. Using a 2716 EPROM for the Game PROM at Z23. it will immediately blow the freshly replaced driver board the transistors and controlling chips, eventually moving all the Since there is no key on the J1/P1 connector, this means you can attach pins 8-13 (note pin 7=gnd and pin 14=+5). After the transformer creates these distinct AC voltages, they are rectified (converted switch (blue arrow) momentarily closes. their solid state pinball boardsets (although a bid was sent to National Everything OK? all the driver board grounds tied together means there's far power supply apart! a short in the switch matrix. J3, so check the voltages there using J3 pin 5 as ground. Again these are not CPU controlled lamps (though the playfield GI circuit does Pinball Repair & Maintenance for the home owner - simple and easy to follow - for beginners to experts. If a closed switch is found, it will display You can also manually ground the non-power side of any CPU controlled lamp socket. value. by the CPU board. and the coil is bad. attaching a small heat sink to the PROM with some superglue. transistor. (banded diode lug), which is right next to the existing sound board light power (6 volts).