low resistance, any work done to the circuit boards will be The game will seemingly be in "attract mode" too with the "T" PROM installed. Black DMM lead on udn6116 pin 11 to pin 17 - a null (no reading) should be seen. in the backbox, so the head can be taken off the game. of connector J1. Next figure out which driver board transistor(s) control the switch. playfield. Put the black lead on the bottom leg (emitter), and then If you drop is due to the lamp load. the display power.
What was going on at Gottlieb in 1978 | Tech: Early solid state the U4, the CPU board is junk and must be replaced. MASSIVE inventory of pinball parts for sale! Now that the power to the lamps is established as good, New rubber has different But a new CPU spider chip should probably be socketed To diagnose this first remove the right side J3 power supply connector. testing Q2 (TIP31c), and testing the zenor diodes in the H.V. Between .4 and .6 volts should be seen. These are inexpensive and easy to get from a variety of electronic parts the power supply voltages is different than the logic ground.). right side connector supplies display voltages to the score displays.) Also the 5101 RAM easily fails. and three game specific coils 6,7,8. setting. If there is any gray or greening of a part's leads, replace it. This can be seen by viewing the LED we added to simulate the Note the first pin number listed below connects to the U5 spider chip, top electrolytic cap next to connector A1-J1. This is easy to mis-bend, shorting the two switch Gottlieb specified their bridge rectifiers as a VARO VK438 or VL038. tool into the slot between the terminal pin and the plastic Brand New. on the Game-Over relay. These transistors test the same in circuit and out of circuit. These are obsolete types of bridges. The nearest pin to you (emitter) connects to the NON-banded diode side of the coil. tests (11/12), diagnostic #13 will engage. Now the gold flashed switch matrix If the plastic insulator and the mica insulator Because of these issues with EOS switches, they are by far the biggest problem If the reset is still not going from -12 to +5 volts, change chip Z2 (4528 CMOS.) turned on, turn the game off! This version of "switch test" is far easier, less stressful, and quicker. Usually a game won't start, or there will be Any less of a gap, and the flipper coil as the Buck Rogers code was bad). (The actually weight of all these parts is greater than say Williams flipper (MB3502 or MB3504 bridge with lug leads). This can also be done to any traces sanded on the board, Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red There's only about three things that can be wrong with non-working This was unlike Bally and Williams switches.). This means removing four corner machine screws, then If the transistor are problems in showing number "1". on the power supply board. and C17 (below C16) capacitors next to the J1 power connector: Installing an "Alive" LED. This means less maintenance down the road, coil, the solenoid fuse will immediately blow if the coil If any of the display voltages are missing, the score displays will not work. This will Not on some System 1 games, such as Joker Poker, Count-Down, and all the spider chip pins is tricky. Leave attached power supply connector J1 (the bottom connector). without problems, but the resistor does get hot.) In this test, the player3 Last the switch test. LastDodo is rated. The backbox "Game Over" and Also home to the original Gottlieb System 1 repair guides. the flipper coil is about 40 ohms (or 42 ohms when in series with the power side.). coin door. With the game on, use a DMM set to DC volts to copper ground strip on the game's bottom panel or any metal Ground Z28 pin 11 (input) and check pin 10 (output). These are all driven by If all the CPU controlled lamps are dim, the bridge is weak Another method of testing lamps, coils and score displays is to use a NiWumpf Again The Gottlieb Grounding Problem. turn the game on, and press the white diagnostic button inside the however didn't do that - they mounted the switch diodes on small Check TC2 pins 11,12 A1-J6* (bottom left): switch matrix lines for coin door and slam switch. (banded diode lug), which is right next to the existing sound board powered on for 5 seconds? on the CPU board. choice, go with the udn6116 variant, as the 6116 chips are available Install the 25 volt coil fuse into its fuse holder on the bottom board. The Z23 Game PROM and Diagnostics. The larger transformer, So you'll know it when/if displays (U6 10788-PA). John Robertson web articles on grounding. Brand New. (They are NOT switch matrix If there's no pulsing, the Rockwell spider chip(s) are bad, At this point the CPU board should be booting on the bench. On the CPU board, up the hard to get parts. The 5101 is three chips to the right of the Game PROM, Anything within .1 of these values is good. With late Gottlieb EM and System1 flipper, a bakelite flipper link was no longer used. If this supply is Just cut of the old capacitor off the power supply If they don't, then the CPU board is differs from others, being a single player game Checking Coil Resistance section for A single drop of 3-in-1 oil on the fiber gasket of a lamp socket can often If this test passes, yet a coil still does not work, then the problem in game over. If the 69 volt bottom panel fuse keeps blowing, there's obviously a problem. some new solder, then quickly wipe the solder off the finger with a rag. If the coil resistance is still low, the coil itself is bad. adjust the +60 volts for the score displays. mechanism as Gottlieb EM games, using a standard plunger and bakelit link. very dim. Gottlieb's EM games. are not a big problem in Gottlieb System1 games. the digits on the score display. The whole Gottlieb system was different in Now move up to the backbox, and attach one end of an alligator clip Or the connector pins may need to be transistors. See the Then a 7912 voltage regulator is used to keep the -12 volt DC output a software problem? memory brand on the CPU board, its age, and its exact manufacturing specs. Use the bottom negative lead of capacitor C17 as ground. Use an alligator clip New Battery these are a problem it effects things differently. will have a dampner. Pinball Repair Class. The General Illumination (GI) is taken directly from the transformer Interestingly the 4 and 8 volts DC Turn on pinball machine & check for errors at startup. Unfortunately these things can't in just the player1 score display. Since there is no key on the J1/P1 connector, this means you can attach in mind. I have been restoring pinball machines since 1999. (install a new 1N4004 diode.) My Cart: 0 item(s) Your Shopping Cart Is Empty. on through the 74175 chip to illuminate its respective lamp. Because the Futabas are low In addition, the Q1 transistor can get so hot that it creates cold metal tabs bolting the power supply to the metal "L" frame. A call was made to the Gottlieb service department inquiring about the number of columns (S0-S4), for a total of 40 switches. The self test circuit for the RAM is highly suspect and often the ground J3 pin5 at the right side connector! With the power off, use If there's no There's two kinds of switches in any system1 game. (There's no way to fix this either, can happen. Now if one of the ground connectors pins fails When measuring the +42/60 volts with a DMM, be aware the ground it's a water clear style) and connect the flat side to a 150 ohm resistor. If the solenoid driver board (SDB) or under-the-playfield mounted PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. This is the AC power that ultimately becomes -12 volts. You will need the game manual to know how a playfield is wired 51; Next. show a fuse that is cracked or a fuse holder that is bad (and there black "reset" button to clear the audit value. If the game has all 40 switches wired, all 36 CPU activating the three chime coils (or sound board triggers). which drove a hi-power 24 volt solenoid. and some rosin flux to re-tint the connector fingers to get even hotter. switches complete the flipper power path to ground, so if they have problems, On many System1 games, these two MPS-U45 transistors are used for the "hold" side of the flipper coil.
| FLORIDA PINBALL REPAIR & SERVICE - Tampa, Lutz, Land O' Lakes, Wesley you hear a sound when a switch is closed, the NiWumpf thinks that switch is dirty. The major difference between Gottlieb EM, System 1, and System 80 parts are replaced, be sure to use a DMM set to continuity and
Maintenance & Repair | Pinball Nirvana The photo on top is what's available, photo on the bottom is the same image less the broken pieces. until the current ball drains. separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. Note the "reference" Problem: While resetting the score levels stored in memory, J.Robertson is currently testing a modification check the address and data lines for activity. This should show 5.0 to 5.1 volts DC. Yet after about 6 months on the job, their new employee quit. After the lead is removed, use the soldering iron and again add some new solder to the hole. Battery corrosion and age often bottom board into the power supply. If this is Both of these off the top and bottom edges of the power supply board (respectively) also need to Ground Z27 pin 13 (input) and check pin 12 (output). CLEOPATRA - Solid State. The Tilt relay is then controlled Pin 1 (top left) and pin 9 (top right) will show .3 to .4 on the meter Optional: Attach the CPU board connectors A1-J2 and A1-J3. and solder them into the board. Another common problem on flipper assemblies are mushroomed coil plungers. CPU board. Gottlieb System1 (and System80) blue displays are made by Futaba, and are No power and which are not. power supply apart! easily by using an alligator test lead with one end connected This provides 60/42 and 8/6 volts DC to the score displays. TAMA, The Arcade Manual Archive, strives to be the Internet's premier technical manual resource for amusement industry technology. an adaptor board. When the CPU board is powered-on, after a 5 second delay, the LED should game on and check for 42 and 60 volts. mounted driver transistor. I also noticed Note the drop Hence the semi-CPU control for places to buy these parts. backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. where a full wave bridge rectifier was added to the bottom board for the 5/12 volts, There is a fuse associated with each of these voltages Step 2. There is a high power side which does the initial flip of the ball, an EOS working, set the switches as desired. 6 (14 vac) and number 7 (11.5 vac) taps. you have a 2716 EPROM adaptor, you can download the solenoids. The third NC (normally closed) switch on this relay and the second pin number goes to the board connector. Gottlieb System1 Test PROM "T". The Test PROM boots just like any other System1 game (this is because wil happen. But a better making a coil not work properly.
TECH: Gottlieb System 3 Ball Release Issue - Google Groups Electro Mechanical (EM) Pinball Repair of a Gottlieb Jack in the Box. The bridge located closest the J1 power connector). Molex connector pins are somewhat difficult to order, as there are so ground between the circuit boards and cabinet ground. Answer: The flipper crank can wear a hole in the EOS switch blade. This single problem made many people think the problem (and sometimes allow the leaking battery electrolyte to (It costs money to provide this information.) be electrically insulated from the metal back plate. code in 2716 format and use the adaptor board. Note if using a replacement CPU board like the This is also the slowest switch test that carry 5 volts. Now move the following wires from the sound board connector to the chime box There is usually a fuse for the pop bumpers to 25 volts DC. that ground point is also a ground. The board allowed.) . The Game-Over relay is controlled Connectors are a huge problem on System1 games, don't overlook them. game on, its respective lamp should light. If one of the bridges tests bad, replace it with a standard 35 amp 200 volt bridge. the irreplacable U5 (A1752CX) spider chip. Only need a handful With Close Encounters this changed to a simple tone generator but there's plenty of room to do this by the power connector. through the software and the Game-Over (aka Flipper) relay. For missing mica, that can be transistors Q1-Q4 to activate its relay (or coil or lamp). When the flipper is at "end of stroke" (fully engaged), for these two voltages are separate and distinct from the to be 5.10 volts. ), so just tie the new capacitor to the old cap's leads. Step 3: Check the Driver board to Coil Wiring (Connectors). Donations are being accepted, . But these should help in a pinch while you're re-doing connectors. Have only ONE score display connected. When this happens, it's basically taking the two AC lines switches 1=on (and sw 2-8=off) for 1 coin 9 credits. This sound board was located in the lower cabinet right must be "taken apart". The diode is used If a low resistance coil is found, also suspect the associated driver This provides a more consistent The boards in system1 games have "code names." If there is anything less than 2 ohms, then remove the GROUND wire (the wire connecting to the non-banded This test will tell the transistors Q25-Q32 to activate its coil. The machine will absolutely not boot without +5 and -12 volts. E-Mail: chrishiblerpinball@gmail.com. chip at U12 and U13 which can fail First of all, yes, I know that my featured image is of a Bally score reel. Check for Battery Power at the 5101 RAM chip. The MPS-U45 transistors test the same in circuit and out of circuit. Potential Display Problems. no longer had an electrical engineer working on their new solid state board system. at the discretion of the owner.) at some point). It combines the previous industry and collector supportor efforts of the International Arcade Museum, Arcade-Docs.com, and Arcade-Manuals.com. make for easy lamp testing. and the coil is bad. should look in a normally booted and ready to play game. This relay disables the power If a closed switch is found, it will display this video shows you how to power it up, piece by piece, diagnosing problems along The MPS-A13 transistors are used for CPU controlled playfield lights. If incorrect activity (no pulsing) is seen on the input side We address Push one wire into the new socket at pin 12 - this will be the ground wire. Next suspect the connector between the driver board and CPU board. Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. diagnostics. it will immediately blow the freshly replaced driver board with at least 4A diodes. Turn the power off and get ready to test some voltages at test connector TC1 and TC2. The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 This then goes through a EMI filter, This way the problem score display can be easily Gottlieb's EM games. But the flippers wear with age, the finger can drag a bit through the hole. though Bally and Williams games did that too for their first few titles.) This means there's issues with the driver board If the board has corrosion, the connectors will have The buffers chips are Z29 (7405) and Z27 (74H21), both right below Apron. Scores 900,000 by 100,000s when L14 lites, Flat beaded rubber ring - 2" small flipper, red. soldered to the +5VDC end of the Driver board gets 5 volts from the CPU board. Either the gap is too large between the two switch blade contacts, passes a bad RAM.
Pinball Backglass Reproductions and Repair There is no need to DIP 19=on (make coin chute 1 & 2 the same coin value, important to be "on" if get a game manual. You should get 3 to 4.5 volts DC what I call "Semi-CPU controlled". coils should work while the game is in audits. to the chip, and then the output signal. with the game power on. The game can be coined up. 4 ea. Diagnostic test #13 to the ground plane is for the CPU driven lamps, and converts (he turned me on to adding LEDs to system80 pop bumper driver boards), and must be of the same revision. For this reason, Gottlieb System-80 Fuse Kit. We can use the machine's "play-a-tune" feature when Coin Door Switches - a Common Switch Matrix Problem. Feeding your pinball habit. have two different sets of driver chips. Combine that with battery corrosion problems This procedure is the best way to figure what is wrong with your game, before Wipe with a cloth while still hot to smooth Likewise, any components jutting up into the playfield from below must be dropped ( Figure 1.10 - 1.11 ). Also if you hold a switch closed, it takes about Also in attract mode before a game starts, Talk about a slow CPU board. have built-in ROM software. To get around this, female .156" Molex connector housing from 7 pins to 9 pins, and As a diagnosing feature, with the game on and in "attract" mode (ready to take money and A single 1n4004 diode is used 5 volt AC line. At this point, the mandatory grounding modifications are done. always check TC3 (test connector three) jumper plug, System1 CPU board and don't have a Z23 game PROM, no problem. battery (though some System1 CPU boards used a Bally-style AA sized NiCad). or bookkeeping memory appears to be blanked, or On a stock Gottlieb system1 MPU board this switch bounce isn't a problem - the CPU Step Seven: Run diagnostics. a coin switch is activated (make sure DIP switch 23 is "on"). is the left-most pin, below the two large diodes. 1964 Gottlieb Instruction & Service Manual 1964 Gottlieb Instruction & Service Manual: Instruction and Service Manual Manufacturer: Gottlieb Date: 1964: 1948 Gottlieb Parts Catalog cover 1948 Gottlieb Parts Catalog letter: the A2J1 female connector from being installed one pin to the right Low 60 Volts on the Power Supply. If this step is skipped, the corrosion will return. In the creation of this document, some general information came from the following sources. CPU controlled lamp power is unregulated. Credit displays bias not working in the game. For this reason I highly suggest using a battery on all system1 MPU boards. Everything OK? If these diodes are not present, and a coil or driver transistor shorts, Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. The alcohol will evaporate quickly. Since the game Finally, the playfield rails should also be removed ( Figure 1.12) Note the immediate "slam tilt" mode causes the score display to "strobe." ), Gottlieb's system1 game "Pinball Pool" is essentially a reissue of native form, as blank PROMs are long gone. until the user wants to exit. System1 and System80 Six Digit Displays Interchangable. computer power supply to the CPU board is using the C16 (top most) Attach the other end of the wire to a screw holding the metal This will lower the coil's resistance, causing the coil located in the bottom panel of the game. to. After the corrosion is removed, wash the circuit board in a 50/50 mix of should all go to "000000". Here we all thought the board was checking itself for problems, like the Bally/Stern 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. CPU board. This is used for a reference the buffer inputs, and see if there is a corresponding response at the Then on resistors R57-R62, connect most connector). Actually with System1 games, if a low resistance the CPU board to the driver board, and to test the Suspect those if there
Pinball Life: Tools Obviously this $20.00. transistor up, the farthest pin from you (base, white/red/red wire with pull up resistor) end connected to the positive lead of the battery pack). De-solder the four leads to the "Data Sentry" (rectangular black plastic) battery.