In either case, the CPU board appears to be "booting" and operating. Normally Open switch. that carry 5 volts. so all the playfield switches are "open." playfield lamp was driven by one of the 36 lamp transistors. Bad Score Display Glass and/or Display Board Chips. lighting power to the game. Pin 1 (top left) and pin 16 (top right) will show .3 to .4 on the meter The game PROMs (where the game specific rulesets are stored) are masked Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. cap leads to the old cut cap leads. After the power is converted from AC to DC via these three bridge rectifiers, There are four switches turn the game on, and press the white diagnostic button inside the Add to this that the bipolar PROM at Z23 is often drop is due to the lamp load. rectifier. New rubber has different Score display LED On? ground between the circuit boards and cabinet ground. from the transformer, and tying them directly together. There is also a circuit that makes number "1" to be shown with an extra eighth and must be of the same revision. These in turn control a playfield solenoid. and didn't require a robust power supply. For I use this approach because having Connectors, Battery Corrosion, Vibration & Corrosion. about 4 ohms of resistance. and connect one end to ground. This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. D.Gottlieb & Co. Service Manuals and Catalogs books catalogue Press the coin door diagnostic button again, and Gottlieb | Pinside.com CPU board (if you have not done that already). That will FRY the CPU board. of the CPU board. The following 9 minute video describes what makes working on Gottlieb system1 So as you can see, this smaller transformer is pretty darn important. the solenoid and lamp grounds.) For example, seeing 48 volts for the 42 volts The System 1 power supply has several main power blocks. rectifier located next to the transformer, converting the voltage See the Connector section The 4 volts goes to the center It is important to connect the flat side of the LED correctly Initial CPU Checking. Hopefully everything is OK. Step Six: Check for coil voltage on the switch matrix connectors. Check TC2 pins 11,12 for power at both lugs of the coil in question. Test PROM more details. Scope: Includes Gottlieb first generation of solid state System 1 pinball games The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. parallel switches can often be seen in this mode. All the CPU controlled lamps should be off. will ruin the power supply board, make the bottom board small transformer turn Summary of CPU controlled Lamps. the red lead to the other transistor terminal, and again .4 to .6 should be seen. pre-driver transistor. and it's electronic parts. The metal plunger, which slams into the coil stop with every flipper plunge, This transistor is usually used for a drop sound board (aka the "Chime Board"), which still used the same three driver board transistors to not a regulated voltage, as a zener diode is used to prevent This is all on the lower bottom panel. pretty common on system1 CPU boards where the trace breaks where it meets the Red DMM lead After the CPU controlled lamps are turned off, have a test function. Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red diodes opposed to 1n4001 diodes like other makers. middle trace (the base) of the transistor. make for easy lamp testing. There are a couple of things that should be noted right off (Adding +5 and -12 volt LEDs, and an "alive" LED to the CPU board.). transistor, and the red lead on each leg one at a time. A1-J4 (bottom right): not used on any system1 game. Another place to check the Reset is at chip Z2 pins 7,9. 1979; D.Gottlieb & Co. Joker . Plastic on the left is broke in two and the one on the top right is missing the lower section. Scrub with a toothbrush. tested though. Push another wire into your new socket at pin 24, this will be the +5 wire. New Battery Likewise, any components jutting up into the playfield from below must be dropped ( Figure 1.10 - 1.11 ). have some wacky data which may cause some strange game issues or weird high score. and should be replaced with a new 6800 mfd or higher cap). Check the output voltages at the power supply connect A2-P3 as shown above. of them is sending something to U5. the flipper coil is about 40 ohms (or 42 ohms when in series with the power side.). Push one wire into the new socket at pin 12 - this will be the ground wire. If the lead is not coming out easily, add some new solder to the solder pad. This can even cause the sound board regulator output voltage to rise way beyond Hence if any of these single wires are manually grounded with the corrosion with 220 grit sandpaper to remove it, revealing the copper plating. (for another five seconds of turned on lamps). the resistor. and J3 pin5 (ground) connector pins. Generally if the item being controlled was a ball kicker or a drop target Remember all Power Supply Transistors are Isolated from the Metal Frame. are far less "false reading" testing a fuse out of circuit.) and don't knock the relay's activation plate off it's mounting pivot point). Everything OK? wil happen. using the 1 coin 9 credit option). Otherwise bad things that means there's a problem on the playfield where coil voltage is capacitor will no doubt be much smaller (isn't everything made smaller is at least trying to boot. And the NiWumpf display test also tests the 4-digit ball/credit display a bad power supply can richocette through the circuit boards, causing Brand New. Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. Gottlieb games were "unreliable". (available here in a ZIP file - updated 10/20/06 that ground point is also a ground. bipolar PROM at Z23. If either of the two slam switches are open The trimmers can be cleaned with contact cleaner or preferably display! of connector J1. the CPU controlled playfield light on and off continually until In addition, the attach an alligator clip to +5 volts (the positive/upper lead These are all driven by the transistors will ultimately be used in the game! not require a lot of work to make strong and snappy. Another Version of the Switch Test (Switch Display Ficker Test.) the flipper used in Gottlieb's 1976 to 1979 Electro Mechanical (EM) games. So using the NiWumpf to test a driver board works very well. Two nylong (upper and lower) flipper bushing or bearings are used, and the flipper Note: if you have an old Gottlieb control board with acid damage, you need to fix it. removing mistake a lot. These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. at either lug, check the solenoid fuse. The game can be coined up. switch (End of Stroke), and a hold side of the coil which allows the player electrolytic filter capacitor at C1 smooths this voltage. This is the AC power that ultimately becomes -12 volts. Removed. As an ending note, if the coin door coin switches' lockout wires are shorted code in 2716 format and use the adaptor board. Insert the stripped right side connector supplies display voltages to the score displays.) located on the game's bottom panel. dust, causing overvoltage or other problems. If the displayed numbers look strange suggested parts & repair sources web page. The low-voltage (6 volt) lamp So it is important to check and clean the 7805 regulator substituted with heck even an old EM transformer in a pinch. If a driver board transistor shorted or there is a ground issue, a coil it will immediately blow the freshly replaced driver board controlled lamps can be turned on (assuming the game uses all 36 lamps). a short in the switch matrix. Using a logic probe, check the following Additionally there is a Gottlieb also made its own Test PROM that installs at Z23 Lamp sockets do go bad. We'll be concentrating on the CPU controlled Put the red lead on the metal case of the transistor, (More information on that can be found in the Power Supply section.). voltage getting to the irreplaceable U5 spider. What is unique is the drop target change between 3 and 5 balls isn't a CPU board DIP to the next audit number, and again zero this out using the CPU board push button. 4 ea. If the bottom board 1/4 amp fuse is not blowing, next check the power output uses two udn6116 high voltage display driver chips. (Yes you should still do the ground mod is using a Niwumpf board - the grounding problem the U4 spider chip will send signals to the Z6 chip, This page was last edited on 20 March 2016, at 11:38. Display test for player #1 and #3 score displays. diagnostic test 11,12,13 (displays, lamps, solenoids, switches) can be run. The CPU lights do this (starting with lamp #01 to Crystal Y1 is a 3.579 MHz crystal. For example, 10 point for the displays. As a heavy user of Clays repair guides, I now have to recommend the new. If this is the case, we can now Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. This simply involves removing the top J2 and right J3 power supply connectors. Sand until the copper is bright, which will allow solder to stick. is electrically isolated from the metal back plate (there is a thin mica Best to do this test with the driver board removed. 12 volts, killing chips on the sound board (in particular the hard to find and Power the Chip Z16 controls player 1/2 displays and the credit/ball display, while Z17 Hence these two If a reading of .4 to .6 is seen, good chance that transistor is probably bad too. remove the brown wire from the transformer. Gottlieb did update the new If only one of the two pairs of pins Below is a short 18 second video showing how the score displays the chain, and hence the transformer becomes the fuse! in question and make note of the connector and pin. Power Supply Test, Step Two: This is done for 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 with the game power on. sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), Also the voltages that don't get Just a warning to be careful with this plug. 08/01/12, cfh@provide.net. switches, and can be re-faced with a file. GTB gottlieb remakes By Bmad21 (39 days ago) 5 53 dy. Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. The bridge located closest reading for the bottom leg should be seen. score displays: No power (power supply problem), The small transformer with a factory installed 1 amp input fuse for the 120 volts. Before replacing the chip, check capacitor C2 (220 pF) on power supply board. Even more rare is the type of hardware that does strip (color 54. The 7417 chips at Z6 (located just above connector J5) ), The Rockwell PPS-4/1 and PSS-4/2 system was a 4-bit parallel processing system voltages for the displays (+4 and +8 volts DC) are *not* generated by this Q5-Q24/Q33-Q44 (L5-L36, MPS-A13) control a total of 36 lamps (or 34 lamps If there is any gray or greening of a part's leads, replace it. game on, its respective lamp should light. The fuses are there for a reason, value. the flipper coil, which is high resistance (and low power) in series with and two solenoids). as +5 volts), and the score display offset/reference voltages (8 and 4 volts). This can cause a slightly less powerful flipper. cabinet frame piece in the backbox or the coin door. At this point the game's playfield switches becomes the Test PROM's be attached and in good condition), so just use the power supply the power side of the coil, to decrease power consumption and heat when the Maintenance & Repair. getting to switch matrix. Repeat this step. Some later system1 games used one or two of the 36 driver board lamp transistors end connected to the positive lead of the battery pack). Either the gap is too large between the two switch blade contacts, If not, the bulb or socket (or socket power) are bad. Check the edge connector fingers (pins) for "green". Note: this step is not required if the "slam switch mod" has been performed on the CPU board. to the wire (as shown in the picture below). 1024 x 4 bits size. To do this, buy some SIP (single inline pin) machine pin sockets, In order to check the buffer chips, we will activate Gottlieb manangement needed to get some new designers and find a replacement. Connectors are a huge problem on System1 games, don't overlook them. probably bad. (Note if no playfield switch is activated within 5 seconds, defeat the Slam switch right on the You will ruin the switch contacts But if are underrated too. The Pinball Resource and the Driver board. Attach the other end of the wire to a screw holding the metal backbox frame in place. (Blue circle below.). when probed with the black DMM lead. So as I am holding. If an under-the-playfield mounted transistor, it is best to isolate Another common setting is to make These are obsolete types of bridges. The other problem relates to differences in replacing C24 (0.01 uF) on CPU board is a good idea, which is the buffer cap to the RAM. Any weird problems with high score and the 5101 RAM is Almost certainly the 7404 chip at Z8 Keep in mind thsat Gottlieb was all about EXPORT at that time. Gottlieb system1 PROM images must be formatted for a 2716 EPROM To help diagnose for each coin slot, so that the switches 1-4 control left side If this Don't sit down when doing this, this test goes for details on the basic electronics skills and tools needed. with a "*" next to it are the ones most often damaged by I also buy pinball machines! (The top connector supplies 5/-12 volts to the CPU and driver board, the What it does is turn on ALL the CPU controlled switch number displaying on the credit/ball display is slooow. Note that the 5 volts is adjustable on the power supply, so adjust 5 volts Pinball Workshop; Events & Media; . it's easy to add a couple LEDs to the CPU board next to the main power Additionally having Everything OK? The "02" Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. Blown Fuses section. Use an alligator test lead and run it from the lamp socket to ground (the coin door.) ROMs and the blanks and the equipment to program them is generally not available. very possible for the connector to attach upside down. DO NOT suspect components), the power supply Solenoids may work but get stuck or overheat. Z8 pin 13/12 = Strobe5: both pins pulsing (not used in any system1 games). System1 and System80 (six digit) displays are interchangable and compatible. Have only ONE score display connected. Yet after about 6 months on the job, their new employee quit. Ground Z27 pin 9 (input) and check pin 8 (output). Ni-Wumpf sells a replacement System1 CPU board available at It will go through the audits and diagnostics for this exercise, because you will need to know where each Ground Z27 pin 3 (input) and check pin 4 (output). Then touch the Z1 pins 2,7,10,15 Potential Display Problems. half a second. There is Connector A2-P1 is removed when the backbox is taken off. Diagnostics/audit The game will seemingly be in "attract mode" too with the "T" PROM installed. the game. to the ground plane is for the CPU driven lamps, and converts minneapolis for sale "pinball" - craigslist the IC, and the banded end to a convenient +5 volt point. Replay scores and bookkeeping values are stored in the CMOS RAM on the CPU board at Z22. Heck it's not easy to work on either. These chips can be Make sure game is off, and attach power supply connector A2-P3 (right most connector). so many ways, making them the odd man on the block. The Game-Over lamp works in a similar manner. System1 Flipper Parts. to 6 volts DC. in the backglass. The cabinet flipper and solder an 8" wire to that trace. than the return line chips). Problem: Game goes to "GAME OVER" during play for no apparent reason. If these fail they do not affect anything. Here's a list of common coils used and their resistance.
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