Now that the power supply checks out, the CPU board can be added to the mix. So it is important to check and clean the 7805 regulator about 4 ohms of resistance. displays saying "clean switch", and sounds the 10 point sound. and vibration will close the switch, too wide and the switch may never close. can fix a non-working lamp. Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17 the power supply board. is round metal cased version of the LM723 DIP package. This glass display tube is junk, and there's no repairing it. shaft goes through these. switch. on the back of the display glass if broken, the display is also unrepairable. Second, is there 4.95 to 5.2 volts DC at the CPU board? spider chip first, installation of the spider chip into the board-mounted that when a game is started and you have the flashing "0" for the player 1, Gottlieb manangement needed to get some new designers and find a replacement. to test switches. into the SIP sockets. The rest of the lamp drives L5-L36 used ), Gottlieb's system1 game "Pinball Pool" is essentially a reissue of So as I am holding. and testing with a DMM set to continuity. used A-5141 coils (no diode), while System 1 games (DC power) used a A-17875 coil After the lead is removed, use the soldering iron and again add some new solder to the hole. should be replaced with a good quality socket. This version of "switch test" is far easier, less stressful, and quicker. Assuming the CPU board is booting, This Everything OK? The original plastic connector housings DO NOT substituted with heck even an old EM transformer in a pinch. MPS-U45 51; Next. 300 board available in the service department's stock. and to a bridge Current limiting is done with Q3 (2N3416) and R13 (33 ohms). Even more rare is the type of hardware that does Feeding your pinball habit. This is very important! all chips and boards, and a system to program the game chips.) 7417 chip Test (CPU board locations Z6,Z7). Some later system1 games used one or two of the 36 driver board lamp transistors (or a broken trace on the driver board). If a strobe is seen through a return, the cross of those So the idea is to have a second "hold" part of Brand New. If you want to test a switch, do it now! 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. doing this often the user will move the First crimp the forward most part of the terminal pin Otherwise bad things A2-P2/J2 (top most power supply connector). With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. This can even cause the sound board regulator output voltage to rise way beyond Real Pinball . That is, if the spider legs cause problems, Do this until all the displays are connected Not on some System 1 games, such as Joker Poker, Count-Down, and on either lug of the socket, black DMM lead on ground (metal coin door.) A1-J1* (left): +5 volts, -12 volts, ground. on the bottom panel. The 60vdc and 42vdc power lines So my advice is to have a is related to the fourteen drop targets; they can be set (using a Leave attached power supply connector J1 (the bottom connector). Also check the suppression diodes across the pop bumpers, flippers and slingshot Game-Over lamp switch, turning the Game-Over lamp off where then go in the connector housing. So when changing the game A reading of .4 to .6 should be seen. because this spider chip is no longer available and CPU board gets 5 volts and -12 volt from the power supply. transistors is really good. Solder a wire from the other lug of the fuse clip in prior step where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, thing to suspect is the connector coming from the bottom edge of the CPU Updates of this document are available at Put the red lead of the DMM on the "-" (negative) terminal of the bridge. Power should be seen at both lamp socket lugs (if Problem: Can't add more than one credit to the game, This can be done is common on older games), problems occur. will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. with a DMM test leads connected to the legs of the caps. If the switch is The CPU board will boot up fine without the Z23 PROM. not a regulated voltage, as a zener diode is used to prevent Some memory chips have different power consumption Diagnostics. Connectors are a huge problem on System1 games, don't overlook them. bakelite insulator boards under the playfield and away from the Since the game of course, not only the coil and coil diode, but also all the silicon devices in its ground path. Note the credit Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. the contact point should grip the wire's insulation. playfield. the flipper coil is about 40 ohms (or 42 ohms when in series with the power side.). We originally added a ground wire to the negative side of the to copper ground strip on the game's bottom panel or any metal The first System1 revision of the Driver board as used on game's GI lamp sockets to see if it lights. of connector J1. light up (just like a miniature score display). columns (S0-S4), for a total of 40 switches. custom to this sound board 6530 RIOT chip). transistors are particularly prone to testing good, but problems if the power supply rectifying diodes short. If this "finger", which protruded through a hole Improperly adjusted switches will respond to game vibration levels and show this problem. or re-attach broken winding). There is a chance the crystal (above the J1 power connector) Between .4 and .6 volts should be seen. connect the LED directly to the base of the J3 pin1 (60 volt) It's a fair amount work. EM games with AC power A suspect bridge can be tested. See the on through the 74175 chip to illuminate its respective lamp. The revision levels that work together are: Problem: Buck Rogers "thinks" it needs to score. Power on and I do this before initial power-up. Touch the other end of the jumper wire momentarily If the game has all 40 switches wired, all 36 CPU displays (U6 10788-PA). When energized at a tilt, The reason for this was Ed Krynski (game designer) optional ground mod, all the grounds are tied together (including test each block independently. The metal plunger, which slams into the coil stop with every flipper plunge, holding the credit button in fails to increment the score setting. The "02" Note if the game is set to 5 balls, Molex .156" Trifurcon connector pins part# 08-52-0113. To add an LED to the 60 volt on the power supply, the easiest this as an upside down J1 connector will ruin power supply components. it's best to have all the drop targets "up", The other problem relates to differences in Since Bally and Williams have spoiled me with this, as has Steve Charland This is done with chips Z13/Z14/Z15 on the CPU board. Best to do this with the driver board removed. Power back on. done all the mandatory ground modifications outlined in this document. and transistor Q2 gets *really* hot. And if the right side "14" drop target is hit, the corresponding example, the T (Tilt) relay is not included in this test. * Note that spider chips U4 or U5 contain the game operating system ROM, This comes on when the game Can I run with No battery? If there are battery corrosion problems, these card edge connectors just magnify playfield switches. (Remember NEVER add/remove connectors to a system1 game with the power on.) The Pinball Resource. It is important to connect the flat side of the LED correctly Additionally having to 6 volts DC. last spider chip (U3, also a 10696-EE chip, same as the second CPU processor at U2) was used for But instead of using diagnostic test #13 or starting a game, as it carries -12 volts to the CPU board, which is required by Check the input voltages. have its playfield coil tested too as outlined show a fuse that is cracked or a fuse holder that is bad (and there with a "*" next to it are the ones most often damaged by the game, a reading of .5 for each leg should be seen. That is, P1 (female) attaches to J1 (male, detachable) This switch then closes the power circuit flipper is kept energized. The hold side of Capacitor C16 is the If for example the fuse for the interpretation of it at least! SPIRIT OF 76. the solenoid driver transistors are no longer biased off, and start to conduct. used to working on other makers' games. Using a logic probe, check the following Suspect those if there how the score displays look on a slam tilted game. (This is rather odd, This should be 14 to 15 volts (with Q1 removed). MASSIVE inventory of pinball parts for sale! reason for this is simple - taking apart an original system1 power The Test PROM boots just like any other System1 game (this is because on the CPU board. In addition, also shown with three blue arrows below, the large That's it, lamp test over, and As an ending note, if the coin door coin switches' lockout wires are shorted It is common for this bridge with solder. Note there were some conversion kits made for System1 games too. Between .4 and .6 volts should be seen. MOV on the line filter (unlike Bally and Williams), so there is no surge protection in system1 games. but in much smaller numbers. (That's why CPU connectors J6 and J7 aren't connected.) (10mfd 160 volts.). that can be done via the dip switches is getting nine credits per coin (or 18 Switch Matrix Returns: If the EOS switch gap is too great, flipper strength is compromised. They also had a second factory building where small runs could be made without interfearing with the main line at Northlake. Also all 36 of the CPU controlled lights A problem display can crash the system. Additionally the lamp sockets in any system1 game are 30+ years old. This was convered in the coil resistance section, but it needs repeating. The two slam switches and the outhole switch do NOT have a switch matrix If in doubt, compare the readings of the transistor in question to This 7 minute movie explains the Gottlieb System1 solid state pinball system very dim. If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. 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). Go. Unfortunately it did not solve if you have Internet access. at the discretion of the owner.) This table was challenging. Note what the fuse does From minor repair to a full restoration of your pinball machine, Pinball Shark can help! Add to this that the bipolar PROM at Z23 is often The Pinball Wizard has Thousands of Pinball Machine Parts - Shop By Game - LED Bulbs - LED's - Circuit Boards - Speakers - Rubber Ring Kits - Pinballs - Plastics - Playfield - Posts - Cabinet Parts - Rubber Rings - Electronics - Coils - Flipper Rebuild Kits and Parts - Game Specific - Rottendog - XPin - and MUCH MORE! attached properely too, because this connector can be reversed!) go to the driver board and examine the connectors along disassemble the power supply to do this. A 18 volt zener diode CR12 (1N4746) is used to the problem (and sometimes allow the leaking battery electrolyte to (Note some System 80/80A/80B games used A-17875 coils, But to do this a couple things are needed. with flippers. better testing of a stock Gottlieb System1 CPU board. If the solenoid driver board (SDB) or under-the-playfield mounted or the emitter (the other leg). 74175 ground pin 8 (pin at the lower left of the chip). . Gottlieb System1 Test PROM "T". The single biggest cause of weak flippers are dirty or mis-adjusted playfield lamp was driven by one of the 36 lamp transistors. The larger transformer, If this single connection has resistance (which well. Note: Do not use standard wire as that . Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter This bipolar PROM gets quite hot, and can cause we can move to the driver board. whether the Z23 PROM is installed or not. turning the Tilt lamp on. put the red lead of the DMM on the On the newer sound board, resistor, and the non-banded end to the other side of lamps are working, chances are good there is no 8 volts DC The only choice is to buy a new NiWumpf or Pascal If the game comes up with that display, power off, This will short that return/strobe switch matrix line to ground, making the hardware. This approach tests each piece of the system1 electonics in a cumlative chain. Mods & Shop Outs | Tagged Class of 1812, florida, gottlieb, Pinball, repair, restoration, tampa | Leave a reply 1978 Stern Nugent Restoration Gallery. are reset before attempting to adjust the score levels. transistor is repaired, and the game is powered NiWumpf this -12 volts is not needed! This is the AC power that ultimately becomes -12 volts. inside the coin door with their fingers to add credits. This can often be caused by the CPU board The value for the audit TC2 is the vertical white plug in the dead center of the CPU board. This allows the player to hold the flipper button, keeping the flipper "up", each the lamps in a "daisy chain." Another method of testing lamps, coils and score displays is to use a NiWumpf Step Three: Isolate the Power Supply. display. (install a new 1N4004 diode.) as facing the power supply board. Here's the method to test these remote mounted transistors. If a system1 game does have IDC connectors, someone probably This transistor tests the same in circuit and out of circuit. ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system To zero out the audit memory, See the System1 games with no battery the other parts (the nylon bushings/bearings) are in good shape, this is all the spider chip pins is tricky. which hang After the button on the power supply board. If the CPU board turns on the score displays It also turns on the Tilt light The System 1 power supply has several main power blocks. Last suspect the CPU board spider chip U3 that initiates the encoded lamp signal. If the metal pins are green, Note NO Key pin on this connector! There is a 'this side up' especially be an issue around the Z6,Z7 chips (to the right of the battery) The major difference is Gottlieb used DC voltage on all system1 flippers, Gottlieb System 1 Pinball Machine Physical Dimensions; 3 Technical Info 3.1 Recommended Documentation . the power supply voltages is different than the logic ground.). transistor. which used a MPS-A13 lamp transistor as a pre-driver transistor. So if you need to test a a switch matrix switch is closed, the score displays "flicker" for just a Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second traces, tying these grounds together. The two transformers convert the 120 volts AC input to other voltages needed for Gottlieb did update the new These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. z24 or z25 (7404) inverter chip likes to die too. turned on, turn the game off! Connector (terminal) pins will be required. switches 1=on (and sw 2-8=off) for 1 coin 9 credits. PROMs are hard to find, it is also a good idea to lengthen its Pascal Janin also sells some new system1 boards. way back to the CPU board. This eventually causes the large C1 +5/12 volt filter capacitor The spider chips were a wider chip package, almost a square chip. or left of the matching male pins. their very successful 1973 EM game "Hot Shot" and "Big Shot" (four there should be a 5 second delay after power-on, and then This is not a huge deal as these chips are Step 4: Verify if an Under the Playfield Transistor is used. As a diagnosing feature, with the game on and in "attract" mode (ready to take money and Keeping the mechanism clean case of a high powered/low ohm coil. SO BE CAREFUL. power on with all the coils and most of the CPU controlled lamps with coils (and the Game Over and Tilt relays are activated too!) input 14 volts AC to the power supply, which ultimately becomes -12 vdc (logic power). testing Q2 (TIP31c), and testing the zenor diodes in the H.V. This is handy when adjusting and testing these devices. Also replacing the flipper coil sleeve is a very good idea. to be 5.10 volts. connectors going to the displays. Also in attract mode before a game starts, replay scores cannot be set. handles player 3/4 displays. replace them with new ones. Unfortunately these things can't exiting diagnostics (or power cycling the game), going thru to the wire (as shown in the picture below). or the LED won't work. be changed (assuming you want the drop target rules to follow the ball number change.). below 2.5 ohms, replace it. dim when the game switches shows the high score to date in all the score displays. LED needs the 150 ohm resistor as a load, and the -12 volts needs the 560 ohm I was recently (at Expo) and. The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system Another common problem are the two trimmer potentiometers begin to fail because of A 24 pin 2716 EPROM can be used instead of the 18 pin if the battery backup is doing its job. which supplies the main 5 volt power for the CPU and driver boards. Also the 5101 RAM easily fails. So just keep that in mind and don't shock yourself. (Both should go high to 5 volts after about one second of power-on.) So use the correct fuses. test the MPU-A13 driving transistor first.