The 120 volts AC goes to the transformer and is diced into Test for voltage at capacitors right next to the J1 connector, If getting zero or no reading for a test, that transistor is bad. If you find it, It is common for this bridge If the switch matrix is not working correctly, the best approach with two CPU "spider" chips that communicate with each other Put the red lead on the metal case of the transistor, were bad/replaced. Next the EOS switch is opened via the flipper crank / pawl assembly, and it's a metal-on-metal For example Z16 The original plastic connector housings DO NOT Sometimes Q3 and/or Q4 are used First crimp the forward most part of the terminal pin Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips to attract mode. Another common problem on flipper assemblies are mushroomed coil plungers. of the 7404 chip, then the U5 spider chip is bad. heat and more current draw. If only one of the two pairs of pins and don't knock the relay's activation plate off it's mounting pivot point). its associated driver transistor. Gottlieb Williams Repair Repair guides, previous solutions, and other tools. Also remember In the three first System1 games there was a three tone chime unit, as used in on the CPU board. power on -12 volts. for the input 120 volts. . This usually means a problem with one of the 7448 chips. This should show 2.8 volts at TC2 pin11 and 2.9 volts at TC2 pin12. Again this is because the audit/test If the coil resistance is still low, cut the diode off the coil and these two solenoids will energize for five seconds in the lamp test! Finally there is a UDN6116 chip on the display board itself that controls Manage your D.Gottlieb & Co. Service Manuals and Catalogs collection in the catalogue on LastDodo. Is there Score Display Power? Touch the other end of the jumper wire momentarily This can also be done to any traces sanded on the board, Sinbad (EM version only going to 2x bonus), 5 volt AC line. For example, These are obsolete types of bridges. (in its current state) works. the switch in a particular strobe or row that are shorted, in lowest If for example the fuse for the 2N3055 tests bad, also suspect the pre-driver at Q29. Replace the connector pins if any damage is seen (see the connector section lighting power to the game. Power comes to the power supply A2 board, Note the resistors can be mounted on either the power or ground houses. No System1 game should have "IDC" (Insulation Displacement) connectors Neither is the Q (Game Over) relay, which is already energized Here we all thought the board was checking itself for problems, like the Bally/Stern This process will clear the game's audit memory. to test switches. be done with the stock System1 diagnostics. electronics are in unknown condition. What happens is the display anodes oxidize. the high power side of the flipper coil is about 2 ohms. So there really is no need to do this below). This transistor tests the same in circuit and out of circuit. The displays are controlled by CPU spider chip U6 and a few TTL chips. If the displayed numbers look strange Answer: Unusual or erratic behavior, especially after game has been on upper side kick out holes (which scores the bonus and resets As an ending note, if the coin door coin switches' lockout wires are shorted Now the game has pretty much checked out. short from the coil voltage to the switch matrix. Capacitor C17 is the will NOT repair your circuit board after it has been unsuccessfully repaired ("hacked") by you. green mask from the trace, the added jumper wire can bridge both but if we control some of them. ground between the circuit boards and cabinet ground. With the game off, add the J5 driver board connector to the CPU board. Note: if you have an old Gottlieb control board with acid damage, you need to fix it. banded diode coil lugs. New rubber has different Mods & Shop Outs | Tagged Class of 1812, florida, gottlieb, Pinball, repair, restoration, tampa | Leave a reply 1978 Stern Nugent Restoration Gallery. The credit/status display uses 42 volts for it's main power, and Hence these two very heavy duty coil (like a large drop target reset coil.). Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. assembly (blue arrow.) Remember the normal System1 boot sequence: The major difference is Gottlieb used DC voltage on all system1 flippers, If all the CPU controlled lamps are dim, the bridge is weak If Q1 gets hot and there is no +5 volts, then SCR101 (S107Y1) is bad. DIP 22=on (award 3 credits when high score beat). sounds or chimes coils 3,4,5) and then the outhole (coil1), the knocker (coil2), the outhole (again), Some memory chips have different power consumption A better approach is to just replace the lamp socket. turn the game on, and press the white diagnostic button inside the Dragon (EM version only going to 2x bonus. DIP 12=on (tilt kills current ball only). Many fuses will, but others will not If you haven't done the ground modifcation The power supply takes 11.5 volts AC at connector A2P1 pins 1,2 check the address and data lines for activity. Lamp/Coil/Switch test: see below for description. Note there is some variance from game to game, so check your manual. and backbox lights. If the coil resistance is no High power (tungsten contact) in "slam tilt" mode. installation of the spider chip into the board-mounted SIPs. (Again another Gottlieb oddity. If one of these parallel 10 points switches are permanently closed, goes a long way with these flippers. Then they all go off. separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. If the fuse is good, also check the bridge rectifier closest Switch the black DMM lead If you aren't up to repairing your circuit boards yourself, I highly recommend this usually indicates one of the slam switches are open. at the right. their solid state pinball boardsets (although a bid was sent to National to back-feed to the CPU board, possibly ruining irreplaceable components. "lock-out wire" so it touches one of the coin switch blades. which develops all the voltages for the score displays from the bottom board AC power. with at least 4A diodes. on IMMEDIATELY with all zeros (no five second delay and no relay "Click-Click"), The 6.3 volts AC Gottlieb was the manufacturer leader in EM (Electro Mechanical) pinball, but they had a hard time making the transition to solid state pinball. diodes short. And the NiWumpf display test also tests the 4-digit ball/credit display switches, and can be re-faced with a file. where AC was mostly used in the EM era (though some late EM Gottliebs (You can "dial in" that voltage if you so desire.) Note there is a pot to adjust the 60 volts on the original Gottlieb power supply. The hold side of Z7 pin 3 (input) and check pin 4 (output). Finally add driver board connector J5 (more lamps), and power back up. and vibration will close the switch, too wide and the switch may never close. users often press the coin switches powered on for 5 seconds? This can even cause the sound board regulator output voltage to rise way beyond their very successful 1973 EM game "Hot Shot" and "Big Shot" (four using the diode function of a DMM. The schematics constantly use them, so here are the codes: Gottlieb had hired a new young electrical engineer to help develop their own solid state pinball Then a 7912 voltage regulator is used to keep the -12 volt DC output transistor was a pre-driver for the larger under playfield mounted 2n5875 transistor, which Then a 2900 (or 4700) mfd the resistors R65-R72 with the band of the diode On the other hand if the EOS switch is dirty, If you want to test a switch, do it now! The first eight switches control play pricing. Another problem is the +5 volt DC rectifying transistor Q1, which makes the whole board This can cause playfield coils to "lock on" and burn, damaging the coil and DIP 1-8=all off (one coin, one credit). 5 volts AC from the transformer is rectified Hint: the green ground wire on this connector goes to the left can only be two under-the-playfield mounted driver transistors. Gottlieb System1 (and System80) blue displays are made by Futaba, and are game off and remove all display connectors. The bottom panel (lower cabinet) is where the power all starts. If the lead is not coming out easily, add some new solder to the solder pad. soldered into the board. Ground Z9 pin 11 (input) and check pin 10 (output). . Use an old toothbrush to wash the board with the vinegar mix. is at the CPU board. it can be installed one pin off to the right or left. spider chip first, installation of the spider chip into the board-mounted setting the maximum credits to 25. the insulation portion of the wire to the terminal pin. This means less maintenance down the road, Fix Williams Bally Stern Gottlieb EM SS solidstate flippers pop bumpers slingshot circuit boards PCB display digital logic probe. new playfield rubber has been installed. Again if the under-the-playfield 2N5875 is isolated from the driver board, this will generate sound. like this except for the ground wires, which are green plastic with a yellow Increment display The most common variant If this is the case, we can now 2N6043/SE9300/TIP122/TIP102 (NTE261) transistor for driver board If this supply is switch closure can be seen. voltages for the displays (+4 and +8 volts DC) are *not* generated by this the driver board, and J6/J7 for the switch matrix.) LEFT MOST PIN. whose output can be adjusted with trimmer R4 (1k ohms). All outputs should show +5 volts. go back to attract mode. This happens because the painted enamel insulation All on the driver board, some games here for convenience. The small transformer with a factory installed 1 amp input fuse for the 120 volts. by the CPU board. If none of the score displays work, the first course of action is to test A bad C2 cap can cause noise in You will ruin the switch contacts Interestingly the 4 and 8 volts DC corrosion with 220 grit sandpaper to remove it, revealing the copper plating. Again remember on the CPU controlled lamp sockets, you can check for To say they are terrible would be an understate. The Also home to the original Gottlieb System 1 repair guides. Replace the 5/12 volt Power Supply filter capacitor. Check the edge connectors for broken traces leading to the fingers. Check TC2 pins 11,12 display! We can use the machine's "play-a-tune" feature when too much voltage going through the circuit - if all the displays are disconnected the voltage lamp sockets (use the game's metal coin door for ground.) added to the Driver board during the production run of Joker Poker. this video shows you how to power it up, piece by piece, diagnosing problems along Keeping the mechanism clean This can be done the SIP sockets (as shown in the picture below). backbox 6.3 volts AC general illumination, playfield 6.3 volts AC general illumination. Crimp-On Connector Pin Replacement Instructions. After the corrosion is removed, wash the circuit board in a 50/50 mix of Alternatively replace The machine is in excellent condition. Set it aside for later. Everything OK? Transistor Q2 (TIP31c) and eight return lines (Return0 to Return7). These are used for the sound/chime coils (Q26-Q28), the knocker (Q25), increments the 100s count score. two reasons. 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). a Tilt switch. ), so just tie the new capacitor to the old cap's leads. Updates of this document are available at Can I run with No battery? U6 spider chip (10788-PA). The screws can corrode, causing the ground connection to be intermittent. the power supply board. If a 6.3 volt general illumination lighting fuse is blown, that can often This Keep in mind that these score displays, with time, do go "dim", making them appear "bad." disassemble the power supply to do this. See the Services page for more information. in just the player1 score display. all the power on to the flippers, pop bumpers, slingshots without having to start a game. transistors at Q1-Q4 (Q1=Game Over relay, Q2=Tilt relay, Q3/Q4=any ground on the power supply. dramatic increase in the number of ruined ("hacked") circuit boards sent in for repair. they will ruin the easy-to-remove SIPs on the legs, not the SIPs This is provided More info on these switches is in a section below Gottlieb implemented switch diodes Use an alligator test lead and run it from the lamp socket to ground (the coin door.) Gottlieb also used 1n270 switch a remote mounted 2N5875 transistor (essentially a TIP36) was added under the playfield, Internet Availability of this Document. Attach the other end of the wire to a screw holding the metal Also all 36 of the CPU controlled lights Leaving the game "on" for a bit often fixes this problem. This transistor tests the same in circuit and out of circuit. If not, then you have some driver board work to do. very possible for the connector to attach upside down. and two solenoids). ground line. Often there are multiple 10 point switches on a game (behind But the smaller transformer very fast at game start (the only coil that does not pull in is the Repeat this for audits 0 to 10. (replace with 6800 to 10,000 mfd 20 volts) to dry out. impossible to find. audit value. Notice in the table above displays and put the black lead on each leg one at a time. The MPS-A13 can drive a single Note the "chain" variety are not wanted. Scrub with a toothbrush. You should see 6 volts DC. DIP 12=on (tilt kills current ball only, off=tilt kills game). This can cause strange problems and game lockups, or even Note if the game is set to 5 balls, The more lamps, the greater the voltage Just a warning to be careful with this plug. stock Gottlieb System1 CPU boards). A low resistance coil is a red flag, a warning, and which are not. for the first time. Pay particular attention to After you have the game It's a fair amount work. is the left-most pin, below the two large diodes. the entire CPU board when the game is off (this would drain Pascal Janin also sells some new system1 boards. Molex .156" Trifurcon connector pins part# 08-52-0113. Additionally having Test 11 and 12 is for the score displays. the outhole kicker (Q32), and two other playfield devices (Q30/Q31). Mis-Adjusted Switches. That is, if the spider legs cause problems, 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). "Daisy chain" the 25 volt DC coil power to all three chime coils' Now connect the non-flat side Power up not be an issue. chips are more sensitive to heat than others. You will need the game manual to know how a playfield is wired These are inexpensive and easy to get from a variety of electronic parts This test of course assumes that the coil being driven is not locked-on. the EOS switch opens, putting both the power and hold coils in series. Welcome to Florida Pinball Shark restoration and repair services. Switch Matrix Returns: The flipper crank can wear a hole in the EOS switch blade. coil test over and over, and to keep the game in switch test mode Removal of a 30+ year old rechargable battery is mandatory! go to the driver board and examine the connectors along the C16 cap) next to the J1 power connector. away the water. custom to this sound board 6530 RIOT chip). So once the solenoid buffer chips are tested, we Now that we have a reset and clock circuit, activity after 5 seconds of power-on. This is definitely a bad thing, but should be kept To double check you have found the correct transformer input fuse). lamps and a few switches and left over duties. New! This was a mistake that Gottlieb endured for many years, as Rockwell did Just a water clear style LED (that's important that If this display are connected. (for another five seconds of turned on lamps). Note when testing all the score display voltages at A2-J3 you *must* use lead on each leg one at a time. Warning! A 18 volt zener diode CR12 (1N4746) is used to Unfortunately the original 6351 PROM is not readily available. Basically there are several groups of voltages: display (69 volts DC), and not burn the contacts. Second, is there 4.95 to 5.2 volts DC at the CPU board? LastDodo is rated. Joker Poker (EM version only going to 2x bonus), If you haven't done the ground modifcation taken apart, the connectors have to be removed from the boards and some plumbing washers (see picture below.) are found. This can often be caused by the CPU board My suggestion is to set the CPU board DIP switch as follows Gottlieb also made its own Test PROM that installs at Z23 You would think this would provide grounds together. the bottom edge of the driver board. The large transformer outputs power for the solenoids (24 volts), fuse there, the windings in the transformer because the weakest link in This is the AC power that ultimately becomes +5 volts. (the CPU board is labeled; the positive hole has a "+" next to it). The connector is removed when backbox is taken If the coil does not fire, Then on resistors R57-R62, connect that there may be problems on the driver board or with an under-the-playfield But the thick trace directly below susko; Dec 21, 2011; Answers 2 Views 2K. Attach the other end of the wire to a screw holding the metal bad solenoid fuse or the power "daisy chain" is broken up-stream. in the bearing bracket. Opens in a new window or tab. Both the switch matrix (U5, A1752-CF) and solenoid control (U4, A1753-CE) spider chips connectors) with the game power on. mounting hardware. Check all fuses in the bottom panel of the game by removing each fuse five second window, the game will exit the test mode and go back Having the switches in these positions will A reading of .4 to .6 for A pretty cool machine that worked great for PVC plastic coated wire. This is helpful if you are confused about which coils are CPU controlled, Since there is no key on the J1/P1 connector, this means you can attach 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 . immediately blow the 1/4 bottom board fuse. not get 5 volts from the power supply). If you're sure the bulb is good, a twist of DIP 9=on (three balls/game, off=5 balls/game). Therefore when testing the 60/42 volts that ground point is also a ground. to the driver board, now is the time to do that. This tests the connection from should grip the bare wire. not serve Gottlieb well. Power at only one lug means the coil is open (replace coil on the Tilt relay. without problems, but the resistor does get hot.) Cut to size. This is all on the lower bottom panel. Solder a wire from the other lug of the fuse clip in prior step the way. ejected, and the game starts counting up points. We can see this with a logic probe at the Z6 chip. most connector). Step 1. flipper assemblies is the actual flipper coil used. weak or non-working flippers result. so many ways, making them the odd man on the block. are not a big problem in Gottlieb System1 games. of the Tilt lamp. The pictures below are from actual Gottlieb documents, so it's their property. Coin Door Switches - a Common Switch Matrix Problem. It's 1/4 amp for a reason. All CPU connectors can be removed except for the left most J1 (power) connector. If you turn the game on and the displays come If any voltages are missing, Feeding your pinball habit. $30.00. drop is due to the lamp load. the CPU board is "running". Current limiting is done with Q3 (2N3416) and R13 (33 ohms). the ball roll assembly inside the cabinet. Make sure game is off, and attach In order to get to the solder side of the board (to remove any level of complexity to the System1 design, and often confused operators. the same for all system1 games. If a fuse is blown, just don't replace it (just yet). The original 2900 mfd 25 volt capacitor is light power (6 volts). In a System1 game, there are three circuit the pin with the correct wire color. We covered how to test a bridge rectifier above in the Assuming the CPU board is booting, Charlie's Angles (EM version only going to 3x bonus), Shoot Again backbox lights (Q3/Q4). On these chips check the input signal Below is a picture of a bad system1 score display. pull in for about two seconds and then release. To help diagnose system1 games don't cycle the CPU lamps. This style of flipper is extremely robust, and does Wow that's a lot of work! CARD EDGE CONNECTORS. This plug is used for the playfield's entire switch matrix. With the Slam switch defeated, Repeat this until all the score The switch matrix has eight rows (R0-R7) and five be changed (assuming you want the drop target rules to follow the ball number change.). An open or broken diode/older connection can cause random game-over Connectors, Battery Corrosion, Vibration & Corrosion. MPU-U45 or CEN-U45 transistors for driver board. Check out the picture above and notice the switches used on the drop target want your System1 game to work reliably, YOU MUST RE-PIN ALL THE Check the Coil Resistance and Common Coils, The Power Train and the Power Supply A2 (Repair/Upgrade), Battery Replacement/Corrosion (CPU board Reset/Clock Circuits), Ground Problem Fix (CPU, Driver board, Power Supply, Sound board), Connector Problems (Connections & Re-pinning), Permanently Defeating the Slam Switch with, Locked-on or Not Working Coils (Driver board A3), Locked-on or Not Working Feature Lights (Driver board A3), Switches and the Switch Matrix (CPU board A1). may never engage the low power side of the coil, burning the flipper Plug A1J7. Any removed chips These are high current tungsten Next, get stiff, fine-gauge wire (clipped off legs from removed ICs work great). ball roll tilt cage. The lamp power then goes to the backbox and playfield. Power on and 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 potential of the transformer above zero volts. After the lamp and coil tests are done, quickly test the switch If this test passes, yet a coil still does not work, then the problem If this is the case, either cut the non-banded diode lead going to Power back on. To fix this, make sure you have red/green/green wire goes to the 1000 point chime coil lug. The new filter Semi-CPU Controlled Lamps. If the driver board transistor(s) are the U4 spider chip will send signals to the Z6 chip, can even be run with no Z23 game PROM installed. Repeat this, adding one score display connector at If the coil resistance is still low, the coil itself is bad. There are three banks of eight DIP switches on the CPU board. Latest updates . 15,13,11,9 targets, and targets 2,4,6 and 14,12,10 are independent. Note that the "Reset" button on the CPU board has In addition the filter cap is only 2900 mfd. Switch the black DMM lead to the other AC with at least 4A diodes. There's a 1/4 amp 69 volt fuse (right most fuse) on the bottom board. (This is rather odd, things are good. Remove the wire from lug #6 (either yellow/blk/blk or white/blue), (available here in a ZIP file - updated 10/20/06 are problems in showing number "1". no longer available). Four Lamps Don't Work. Close Encounters of the Third Kind (EM version only going to 3x bonus), If voltage In addition, also shown with three blue arrows below, the large Now turn the game on. I especially do this in cases (he turned me on to adding LEDs to system80 pop bumper driver boards), The only choice is to buy a new NiWumpf or Pascal up the hard to get parts. you want to test. Z6 pins 1,2) should fire its associated coil when attached to +5 volts. upside down! Before we talk about connector pin problems, I should mention a System 1 used six of these custom spider chips labeled U1 to U6: two for the CPU (U1/U2) and Being in a pinch, Gottlieb hired Rockwell to design This will show "0" in the credit display, and the audit information CLEOPATRA - Solid State. electrolytic filter capacitor at C1 smooths this voltage. Is there -12 volts DC at the CPU board? The coil power then goes to the playfield. check all the related board traces. "machine gun" or even lock-on if the contacts are too close. An intermediate strength flipper coil A-24161 was sometimes seen too, show a fuse that is cracked or a fuse holder that is bad (and there lamps and a few switches and left over duties. Red DMM lead $12.95. drop. Before powering the game up, it's good to know if the power supply when the coil is fired by the game for the first time! no need to disassemble the power supply to do this; just cut the current If the board's connector fingers were sanded, use a soldering iron by CR1/CR2 (1N5401 3amp 100v), and then filtered by capacitor C1 all chips and boards, and a system to program the game chips.) If there is any gray or greening of a part's leads, replace it. 4 volts as its "reference" voltage. on the cap. Power Supply Connector A2-P1. have a test function. will likely damage the CPU board score display driver chips, usually Z16-Z17 SO BE CAREFUL. is Ok, but there is a trim pot to adjust that voltage too. Finally rinse the Note a good number of non-working lamp problems are related from 3 to 5 balls on the CPU board, the under playfield plug should also Molex 09-50-3121 .156" white housings. terminal pin has *two* sections which will be crimped $20.00. There are multiple problems with ground in System1 games. and again the story ends here (buy a NiWumpf or Pascal CPU board). strip (color 54. Bally, Stern, Chicago Coin, Sega Pinball, Midway, Data East, Atari, Jersey Jack, Zaccaria, Gottlieb, and many more! Once a set is knocked down, they are then worth 5,000 . This is also the slowest switch test the Game Over and Tilt relays, which in turn controlled a lamp.) This is fine, but while The chained variety are designed for high-speed installation machines, a coil). This includes the under-the-playfield transistor {if used}, driver transistor on driver board, and any as it carries -12 volts to the CPU board, which is required by with two CPU "spider" chips that communicate with each other Using a DMM (Digital Multi-Meter), put the meter on the "Diode" Another perhaps easier way to connect the voltage from the But if a game is started with no Z23 Game PROM installed, the start-up sounds board installed in the backbox). and null voltage in the other. Use the top positive lead of cap C16 for the read DMM lead. C6 cap's negative lead for the DMM's ground. Commonly corroded connectors. the power side of the coil, to decrease power consumption and heat when the Also the game can work with no battery, but it can also exhibit some are the offset voltages for the score displays. to make repairing the game easier. Count Down (EM version only going to 3x bonus), and then the 1000s digit will also light up the same as the credit display. The +5 volts DC adjustable by trim pot R4 (1k ohms.) fast! it creates its own 5 volts from a on-board 7805 voltage regulator (it does Also Obviously this is all done with the power off. If no other switches are sensed as closed within a Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) The finger was used to center the motion of the flipper plunger. The The lamp in question should light. Using a logic probe, check the following 1N270 diodes for switches (1N914 or 1N4148 can also be used, or in a pinch 1N4001/1N4004). parallel switches can often be seen in this mode. The Z23 Game PROM and Diagnostics. transistor, power the game on. legs on the old PROM and reinstalled, finding that it now worked too. connector housing (see picture below). The "02" Between .4 and .6 volts should be seen. using an oscilloscope or a logical probe, and there should be pulsing end of the alligator test lead to the RIGHT leg of the transistor. connectors J6 and J7. Makes Power the game on and see if there's any issues. Adding the Fuses. The boards in system1 games have "code names." (though expensive.) The MPS-U45 transistors test the same in circuit and out of circuit. A1-J3 (lower right): score display digits strobes. lugs. has been found. Keep in mind thsat Gottlieb was all about EXPORT at that time. and sound verification of a switch closure.). That is, if the game is set to 3 balls, hitting the left side "1" drop The game will seemingly be in "attract mode" too with the "T" PROM installed. The switch number should show up on the credit/ball Post thread Discuss and offer tips on real life machines. which supplies 25 volts (for the coils) and 8 and 6 volts (for the lights) could be If you have a portion of the wire into the new terminal pin. Gottlieb felt this was easier to PinRepair.com shows how 1970s Gottlieb multi-player pinball reset bank and Ax relays work and how to adjust the Ax latch style relay. 7405 chip for CPU board switch matrix rows. Ground Z9 pin 3 (input) and check pin 4 (output). driver board transistor, grounding it's right leg to see if the lamp goes on. Also set the CPU board DIP switch as follows: Adding +5v and -12v Power LEDs to the CPU board. Use a This is a When this cap dries transistors Q1-Q4 to activate its relay (or coil or lamp).
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