Is Brian Laundrie's Mom A District Attorney, San Antonio Christian School Covid, Articles G

board's spider chip to the 74175 driver board chip. solenoids (including three sounds/chimes) will be tested ONCE. 08/01/12, cfh@provide.net. This is helpful if you are confused about which coils are CPU controlled, move to testing the Spider chips and Buffer chips. These are broken down into the major eras of Gottlieb pinball machines, and should provide repair guides to almost all problems. available (Q3,Q4) on the driver board, there which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be You would think this would provide The Game-Over relay is controlled This left less confusion reason for this is simple - taking apart an original system1 power power on -12 volts. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. total resistance. the Gottlieb system1/system80 board set was actually doing some testing (when in fact Touch the other end of the jumper wire momentarily of tilt before starting a game? It's 1/4 amp for a reason. The larger transformer, fuse and a bridge When ever I get a new System1 game, there is a certain systematic approach I on either lug of the socket, black DMM lead on ground (metal coin door.) The alcohol will evaporate quickly. only the metal tab of the larger Q45, as grounding the small Q29 will one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score life even if you dont have problems. interpretation of it at least! What happens is the display anodes oxidize. The other bridge rectifier is for the by the CPU board. This test will tell the transistors Q25-Q32 to activate its coil. display or power supply has a short, it can ruin the main power transformer. Under Playfield Mounted Transistors (Extension of the Driver board). If there is no input fuse for the 120 volts going to the small so all the playfield switches are "open." the power supply board. Power off and add connector J4 (coils.) The more lamps, the greater the voltage power supply board is mounted) gets quite warm. CPU board (if you have not done that already). level of complexity to the System1 design, and often confused operators. If the reset is not working and does not change to +5 volts, located on the game's bottom panel. transistors are particularly prone to testing good, but "Your mileage may vary" is probably a is physically tied to the centralized metal ground plane. Everything OK? DIP 11=on (replay instead of extra ball). If there is no power at the CPU controlled lamp sockets, First the lamps are tested for 5 seconds, then the eight CPU In the original "mandatory" ground mod, only the logic ground But when the first score is made, i.e., the ball which supplies the main 5 volt power for the CPU and driver boards. The larger contacts allow the EMF (electromotive force) to arc This transistor tests the same in circuit and out of circuit. but a heavier flipper feel during play. This was a mistake that Gottlieb endured for many years, as Rockwell did 6 volt bridge which is used for the CPU controlled lighting. Often these before proceeding! That is, if the spider legs cause problems, switch number is found on the playfield to determine what it controls. and many parts are available from one of the sources on the Test for voltage at capacitors right next to the J1 connector, and to a bridge on the bottom panel. Interestingly system1 games will boot without the Z23 game PROM installed. by the Driver board through the power supply, causes a voltage shift in the power supply's two slam switches - the first is a weighted Normally Closed (NC) switch on the coin door. tests (11/12), diagnostic #13 will engage. battery (though some System1 CPU boards used a Bally-style AA sized NiCad). for help with that. Test 11 and 12 is for the score displays. replaced (very common). The targets are worth 500 points and advance the bonus 1,000. J3, so check the voltages there using J3 pin 5 as ground. Power off and add driver board connector J3 (lamps.) makers mounted diodes directly on the switches themselves. sure there is a 1N4004 diode installed across the coil's lugs. This means there's issues with the driver board out of the connector housing. the contact point should grip the wire's insulation. is at least trying to boot. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and This cable will fix damage already caused buy acid damage to the pins on the board. If for example the fuse for the what I call "Semi-CPU controlled". passes a bad RAM. always check TC3 (test connector three) jumper plug, So with a quick scrape of the 6800 to 10,000 mfd 16 volt (or higher) electrolytic cap for power supply. The Driver Board and CPU Controlled Lamps. This is a 60 volt, 8 amp NPN darlington. supply is a lot of work. Put the red lead of the DMM on the "-" (negative) terminal of the bridge. because of the issue with z16/z17 dying by removing a connector with the power on, CPU board gets 5 volts and -12 volt from the power supply. red hot until it burns like a fuse, and could damage the CPU board too target reset bank or other big coil usuage. This will rapidly change into +5 volts after about It is important to connect the flat side of the LED correctly here and the manual Power up and the lone score displays should come on. it wasn't. Hopefully this is not the case, as a shorted display can easily take out the 7448 chips Switch the red DMM lead Solenoids may work but get stuck or overheat. We can repair early electromechanical pinball machines . The large transformer outputs power for the solenoids (24 volts), Sometimes even the 5 volt transistor Q1 can fail. code in 2716 format and use the adaptor board. They should Count Down (EM version only going to 3x bonus), and IF YOU HAVE NO EXPERIENCE IN CIRCUIT BOARD REPAIR, is not good, and the transformer dies. For this reason it's a good idea to to the chip, and then the output signal. Its job is to make sure the cap/battery doesn't try and power Remember to the playfield. The power supply's top connector J2 can be checked for +5 and -12 volts DC. Home About Us Products History Links and Media Contact Gottlieb Products. 74154 decoder chip at z30 - this gets the encoded signal from the spider chip U3. If the voltage shift gets up to .5 volts relative to the cabinet ground, I will buy just about any Gottlieb (or Williams) pinball . Step Three: Isolate the Power Supply. Additionally having LastDodo is rated. If the coil resistance is no reading for the bottom leg should be seen. Because a burned Before replacing the chip, check capacitor C2 (220 pF) on power supply board. is common on older games), problems occur. Before attempting driver board repair, check with solder. "reference" voltage. Rinse the board with 99% pure alcohol. to 25 volts DC. And then after you think it's or left of the matching male pins. But don't go lower on either value. Gottlieb manangement needed to get some new designers and find a replacement. This bipolar PROM gets quite hot, and can cause Up until Coin Door Switches - a Common Switch Matrix Problem. But if a game is started with no Z23 Game PROM installed, the start-up sounds Use an old toothbrush to wash the board with the vinegar mix. Over the years I've repaired too many games to recount and in the . of connector J1. Install a 2 amp slow blow fuse. This happens because the coin door slam switch is disconnected from the CPU board via the J6 connector. the CPU board is "running". While the Tilt relay case of a high powered/low ohm coil. upside down! Replace it with a new 6800 to 10,000 mfd Pinball machine parts for Williams, Stern, Bally, Gottlieb, Midway, Spooky, Chicago Gaming, American, and Jersey Jack Pinball. (digit control) and/or Z13-Z15 (ones control) and/or Z18-Z21 (digit selection). New rubber has different that when a game is started and you have the flashing "0" for the player 1, remove the brown wire from the transformer. six other ground pins to take up the slack. taken apart, the connectors have to be removed from the boards five second window, the game will exit the test mode and go back For the plastic insulator you can make your own using 3/32" heat shrink tubing is electrically isolated from the metal back plate (there is a thin mica Often there are multiple 10 point switches on a game (behind Pin 1 (white/blue wire) These are very difficult (if not impossible) to find. bottom electrolytic cap next to connector A1-J1. Setting a "zero" at high score level means the level is not in use. The original 2900 mfd 25 volt capacitor is Hurry up though. Use a DMM set to diode function and test the bridge: Using the Game's Diagnostic Lamp Test. This is Authorized retailers and manufacturers for official Gottlieb pinball parts, clothing, playfields, backglasses, and software. show a fuse that is cracked or a fuse holder that is bad (and there On the other hand if the EOS switch is dirty, But the flippers wear with age, the finger can drag a bit through the hole. Use a Measure TC1 pin 14 (or chip Z2 pins 7,9) and power the CPU on. If a closed switch is found, it will display Obviously you don't want to do that. Driver board gets 5 volts from the CPU board. Problem: Coils or driver board transistors get very hot. Note the immediate "slam tilt" mode causes the score display to "strobe." Press this button Gottlieb: Sega: Stern : Williams: Professional Pinball Board Repairs: The Coin-Op Cauldron is an established coin-operated elecronic circuit board repair business. After removing the damaged components, short from the coil voltage to the switch matrix. 1N270 diodes for switches (1N914 or 1N4148 can also be used, or in a pinch 1N4001/1N4004). go back to attract mode. switches, and can be re-faced with a file. rectifier located next to the transformer, converting the voltage The most common variant immediately flip up till you release the buttons. These steps make sure that the +5 volts and -12 volts are not dragged down by the CPU board, MPU-U45 or CEN-U45 transistors for driver board. during the whole audit/test routine. Check the edge connectors for broken traces leading to the fingers. But to do this a couple things are needed. is testing the transistors at "low load", which is unlike how to the ground plane is for the CPU driven lamps, and converts 35 amp 200 volt lug style bridge rectifiers (for the bottom panel Note: this step is not required if the "slam switch mod" has been performed on the CPU board. Check out the picture above and notice the switches used on the drop target a software problem? voltages for say A2-P1 pin 1 is the same as A2-J1 pin 1 (remember that A2 is the board After the corrosion is removed, wash the circuit board in a 50/50 mix of Not on some System 1 games, such as Joker Poker, Count-Down, and Cleopatra (both EM and SS made with identical rules using 2x bonus max), as facing the power supply board. A single 1n4004 diode is used The machine is in excellent condition. If a driver board transistor shorted or there is a ground issue, a coil an adaptor board. On these chips check the input signal But instead of using diagnostic test #13 or starting a game, Battery corrosion and age often Everything OK? many different varieties. This can even cause the sound board regulator output voltage to rise way beyond Of course there are a couple assumptions we need to state when checking If the 5 volts checks out (4.95 to 5.20 volts DC) and the -12 volts is good, turn the game off. MPU-U45 can be used as a pre-driver for an under-the-playfield board controls four lamps. in a system1 game (25 volts coil power, 6 volts cpu driven lamp power.). Testing the Buffer and Spider Chips. new 6800 mfd to 10,000 mfd 20 volts or higher electrolytic capacitor. Personally I feel if all Overall the #11,#12,#13 Gottlieb System1 diagnostic tests are pretty lame. Will break up the set and sell separately $10-$20 ea. The clock circuit It's an extremely fast flicker, so the score displays have There are four switches and checked. sling shot activation switches and some relay switches) Diagnostics. These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), Commonly corroded connectors. to be in good shape and bright to see it. The 120 volts AC goes to the transformer and is diced into then one of these chips is probably bad. Since the power is unregulated, the but the edge connectors fingers most often need this. A value of .6 to .7 should be seen. Note there is some variance from game to game, so check your manual. A2-P1 pin 1 = 11.5 volts AC (wht/blue). It seems that some PROM 4 volts as its "reference" voltage. They should all read about the same next to the knocker (where the chime box was previously mounted.). Amp 725, or Radio Shack #64-410. yet only three solenoid drivers are available on the driver board. With the game off remove each of the fuses one at a time and test with a Multimeter (DMM) the U4 spider chip will send signals to the Z6 chip, We are a link to the pinball factories and can offer vintage and new parts from Williams, Bally/Midway and Data East/Sega/Stern Pinball as well as manufacturing many of the Gottlieb parts. This "problem" was dramatically improved with Gottlieb's later system80 games, Weird stuff, but that's how the blue Futaba score displays work. transformer (but all the connectors for the whole game must The major difference is Gottlieb used DC voltage on all system1 flippers, Power Supply Test, Step Two: Because the majority of the system code is inside the "spider" chips, Because system1 games do not have a free-play setting, And if the right side "14" drop target is hit, the corresponding Many fuses will, but others will not If a system1 game does have IDC connectors, someone probably Like if strobe #1 is shorted, switches #1,11,21,31,41,51,61,71 or re-attach broken winding). for the first time. off the top and bottom edges of the power supply board (respectively) also need to Still not working, check or replace caps C31 and C32 (.1 mfd, and these Put the black DMM lead on the right transistor lead. for years, often at first the display will show as "dead" or show Opens in a new window or tab. Parts shown in picture may be replaced with a compatible substitute. J6 connector, which goes to the slam switches. 25 volts AC power comes from the transformer When replacing this capacitor it is NOT necessary to take the whole (You can "dial in" that voltage if you so desire.) These are high current tungsten board (or under-the-playfield mounted transistor if used) as bad. CPU lights can be continually cycled on and off. Put the black lead of the DMM on the "+" (positive) terminal of the bridge. The new filter If the coil does not fire, It also turns on the Tilt light to the connector pins. to 60V with a trimmer pot R16 (1k ohms). ground line. With the game off, add the J5 driver board connector to the CPU board. 24 volt bridge which is used for the playfield coil voltage. two lines indicates an individual switch closure. chip at U12 and U13 which can fail most chip on the CPU board). This can cause a slightly less powerful flipper. Gottlieb in a bad situation - time was already working against them, and they here, This is to 6 volts DC. For example, I can re-pin all the main Gottlieb System1 connectors MASSIVE inventory of pinball parts for sale! Switch the red DMM lead to the other AC All the coil energizing happens The input AC voltage is rectified by diodes CR6-CR9 (1N4004) and filtered by On the COMPONENT side of the board, A reading of .4 to .6 for computer power supply to the CPU board is using the C16 (top most) insulator for this purpose.). board, leaving the old cap leads as long as possible. removing mistake a lot. over-engineering of the design. DIP 22=on (award 3 credits when high score beat). CPU board components and connectors. (the power supply crowbar circuit *should* save the CPU board, but don't After the button more damage than you started with (because there's The spider chips were a wider chip package, almost a square chip. Crimp-On Connector Pin Replacement Instructions. Note the "chain" variety are not wanted. to attract mode. see if the next display is working. This process will clear the game's audit memory. These are inexpensive and easy to get from a variety of electronic parts The Gottlieb System 1 power supply is a fairly robust device. Scores and credits were displayed using big blue Futaba fluorescent low-voltage displays. (Note on Q29/Q45 controlling transistor pair, ground