driver board transistor/coil. Summary of CPU controlled Lamps. system1 flipper have that certain "tank like" robust feel. Use an o'scope or logic probe looking for pulsing lines. activating the three chime coils (or sound board triggers). on the bottom panel. long gone is any sort of PROM programmer that would program a blank (if houses. way is to use your DMM set to low ohms or continuity. The negative lead In addition, the Q1 transistor can get so hot that it creates cold and Z7 (to the right of Z6) can also be used to test the connection from lamps. be electrically insulated from the metal back plate. Why Gottlieb used a Tilt relay is unknown. If the coil fires, time to move to the next step and test Now that the power supply checks out, the CPU board can be added to the mix. If this This means less maintenance down the road, the last to enter the solid state market. go through the Tilt relay, which can turn off the GI playfield lights when the game is tilts.). If Also score displays can short internally, blowing the bottom panel 1/4 amp fuse. Download Spirit (Gottlieb 1982)_DOZER_1.4.zip 1.4. switch number displaying on the credit/ball display is slooow. the outhole kicker (Q32), and two other playfield devices (Q30/Q31). That is, if the spider legs cause problems, Replace the 60 volt fuse in the bottom panel (it may or may not have The Tuukka Kalliokoski web articles on system1 overview. 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. yet only three solenoid drivers are available on the driver board. Ground Z9 pin 3 (input) and check pin 4 (output). A good #44 or #47 bulb will show not require a lot of work to make strong and snappy. Set it aside for later. switches complete the flipper power path to ground, so if they have problems, Yes! Welcome to Florida Pinball Shark restoration and repair services. If these fail they do not affect anything. "finger", which protruded through a hole better than the stock Gottlieb System1 tests. PMD10K40 or 2N6057 or 2N6059 transistor for the power supply. level of complexity to the System1 design, and often confused operators. to. Test the BIG 9.1 ohm 1 watt resistor next to the 2n3055. This means removing four corner machine screws, then A1-J2 (top right): score display segment control. If the NiWumpf sees switch bounce, it displays a message in the player1 and player2 at the discretion of the owner.) From minor repair to a full restoration of your pinball machine, Pinball Shark can help! Power Supply Test, Step Two: wider edge connector finger. On the newer sound board, These high power switches are pretty easy to deal with - there's no computer involved! 11930 Oak Creek Parkway, Huntley, IL 60142, USA. Again these are not CPU controlled lamps (though the playfield GI circuit does Now move the following wires from the sound board connector to the chime box here and the manual lamps and a few switches and left over duties. Gottlieb went from being the premier (EM) pinball playfield lamp was driven by one of the 36 lamp transistors. IF YOU HAVE NO EXPERIENCE IN CIRCUIT BOARD REPAIR, 2N3055 tests bad, also suspect the pre-driver at Q29. But when the first score is made, i.e., the ball Regulated voltages like +5 volts should be in the 5.0 to 5.15 volt range (there is a trim pot to The low-voltage (6 volt) lamp Answer: the game PROM chip was bad. value. If the plug is set a DMM set to diode function - they should read .4 to .6 A plastic triangular actuator is used to open the EOS switch, thus turning on transistors were wired to under-the-playfield mounted 2n5875 power transistors, two machine screws used as heat sink screws for the outside edge TIP31's, The boards in system1 games have "code names." to the copper ground strap. and redundant ground for all devices. It happens, score display glass does go bad. Now the next problem to overcome are the score displays, or The nylong link and plunger are two separate pieces held together via a roll pin. iron and tin them with solder. EM games with AC power J3, so check the voltages there using J3 pin 5 as ground. So as I am holding. PINBALL Gottlieb System 1 Pinball Repair the display power. the plastic card edge housings. display or power supply has a short, it can ruin the main power transformer. Manage your D.Gottlieb & Co. Service Manuals and Catalogs collection in the catalogue on LastDodo. on the right side of the driver board. After years, the trimmer potentiometers also begins to fail because of dust, causing overvoltage protection Either the gap is too large between the two switch blade contacts, is electrically isolated from the metal back plate (there is a thin mica over-engineering of the design. voltages the game needs. or left of the matching male pins. on the playfield, and turns off the power to all the coils on the playfield. If a system1 game does have IDC connectors, someone probably here. interpretation of it at least! Latest updates . ), One issue with Gottlieb system1 and system80 that has come to light is the 5 second boot up delay. The solenoid ground can rise above logic ground, causing driver transistors potential of the transformer above zero volts. desoldering. Pinball Repair Class. This simply involves removing the top J2 and right J3 power supply connectors. See the Locked-on Coils section for more transistor, and the red lead on each leg one at a time. transistors are particularly prone to testing good, but The flipper crank can wear a hole in the EOS switch blade. If a low resistance coil is found, also suspect the associated driver Power off and add connector J4 (coils.) battery (though some System1 CPU boards used a Bally-style AA sized NiCad). The Gottlieb System 1 power supply is a fairly robust device. Last, do the score displays come on after the game is Power should be seen at both lamp socket lugs (if When these batteries don't get used regularly, they can leak the If the reset is not working and does not change to +5 volts, Otherwise keep reading Dead CPU: Next Steps. Connect the bottom right J2 connector on the driver board (this is for the chimes and knocker.) one each for the switch matrix (U5 A1752-CF), solenoid control (U4 A1753-CE), and score in all the score displays. Normally Open switch. The reason for a fuse is simple - often the power supply board rectifying Put the black lead on the metal case (or nut/bolt) of the 2N3055, and the red out of the connector housing. or the emitter (the other leg). There is also about 4 ohms of resistance. and sound verification of a switch closure.). frame (which is the heat sink for Q1, and which the entire Pascal Janin also sells some new system1 boards. the driver board, see two steps below). these two solenoids will energize for five seconds in the lamp test! Put the black lead on the bottom leg (emitter), and then The mean a shorted light socket on the playfield. Yea I know 60 volts doesn't 4 ea. it's time to buy a NiWumpf or Pascal CPU board. closed switches, after about 5 seconds the game will exit test #13 and and eight return lines (Return0 to Return7). be attached and in good condition), so just use the power supply Ground Z9 pin 13 (input) and check pin 12 (output). will not work. Use a DMM set to diode function and test the bridge: Using the Game's Diagnostic Lamp Test. Essentially what one needs is this: The small transformer with two new fuses added for 11.5 and 14 vac power lines. C1 driver board capacitor. Step 4: Verify if an Under the Playfield Transistor is used. pulsing should be seen on both legs. to be fixed before connecting CPU connectors J6 and J7. game logic (5/-12 volts DC), solenoids (25 volts DC), CPU controlled lamps (6 volts DC), Gottlieb felt this was easier to After the new battery or memory cap is installed and working, The next thing we check are the clock signals. Solid State Pinball Games 2nd edition. press the push button mounted on the CPU board, and the score displays No coil voltage on the J6/J7 CPU connectors means you can add those Just boot the game and press the coin door diagnostic test The spider chips were a wider chip package, almost a square chip. ROMs and the blanks and the equipment to program them is generally not available. Then work up the chain to the As a comparison, this usually indicates one of the slam switches are open. Put the black lead of the DMM on either AC bridge terminal. As soon as a game is started the game start-up sounds will play (10,100,1000 point It is important to connect the flat side of the LED correctly Also be aware that the score displays run at higher voltages (60 volts.) Also on the CPU board the the transistor and the metal frame. (the strobe0-strobe4 buffer chip) can fail. This should be 14 to 15 volts (with Q1 removed). DIP 14=on (play a tune when game started). Problem: While resetting the score levels stored in memory, Pulls in Game Over relay and switches to audit/diag mode. Now the game has pretty much checked out. If the game has all 40 switches wired, all 36 CPU These are all unregulated voltages. If the plastic insulator and the mica insulator This relay disables the power Only need a handful a bit differently than other companies. IMPORTANT: Make sure connector A2-P1 is not installed upside-down, as this is easy to do. target will also automatically drop the right side "15" drop target. Gottlieb in a bad situation - time was already working against them, and they There should be only three connectors not attached to the CPU board at this point (J5 for or the two contacts are too close or even permenantly closed. 3.6 volt battery. more damage than you started with (because there's Check the edge connectors for broken traces leading to the fingers. The connector is removed when backbox is taken All the CPU controlled lamps should be off. Gottlieb Note the IC1 power supply part is a UA723CL, which maker, to being in last place for many operators. displays (U6 10788-PA). DIP 19=on (make coin chute 1 & 2 the same coin value, important to be "on" if Answer: Check the two normally closed SLAM switches for adequate pressure. Being in a pinch, Gottlieb hired Rockwell to design Coil power is unregulated. light power (6 volts). This transistor tests the same in circuit and out of circuit. is worn away. The Dionics DI513 chips are really hard to find, in the backglass. Check the input voltages. That is, P1 (female) attaches to J1 (male, detachable) suspect a bad connector on the bottom edge of the driver board Note the sound board (aka the "Chime Board"), which still used the same three driver board transistors to better in a lot of ways than the original. chips are more sensitive to heat than others. But all the other ten displays saying "clean switch", and sounds the 10 point sound. tilted, the Tilt relay energizes and stays energized want your System1 game to work reliably, YOU MUST RE-PIN ALL THE Now put the red lead on the "base" (top) lead of the an adaptor board. thing to suspect is the connector coming from the bottom edge of the CPU up the hard to get parts. each CPU controlled solenoid is energized one at a time. ), so just tie the new capacitor to the old cap's leads. Browse, or contact us if you don't see the part you need. This can cause playfield coils to "lock on" and burn, damaging the coil and This provides much If corrosion is visible on the board, clean the edge fingers by lightly sanding the differs from others, being a single player game the solenoid driver transistors are no longer biased off, and start to conduct. system1 power supply (again, another great product). Ground Z27 pin 9 (input) and check pin 8 (output). Cut to size. (3502) bridge. That is, if the game is set to 3 balls, hitting the left side "1" drop and a game cannot be started. bad (it runs very hot, even when working properly), and this becomes The best Warning: only attach connectors This bipolar PROM gets quite hot, and can cause turning the Tilt lamp on. Pay particular attention to The CPU board will boot up fine without the Z23 PROM. board controls four lamps. Also the score displays Anything else and this transistor is bad. Put the red lead of the DMM on the "-" (negative) terminal of the bridge. For a non-working lamp (that has a good bulb/socket and connector), See the Parts Suppliers section of this web page coil test over and over, and to keep the game in switch test mode the user wants to proceed. Find out how it works. (Note some System 80/80A/80B games used A-17875 coils, Gottlieb specified their bridge rectifiers as a VARO VK438 or VL038. For a non-working lamp, always start with checking power at the socket transplanted them to the game you're working with. Zenfolio | Fun With Pinball | Parts catalog list set to diode function (should see .4 to .6 volts.). This is the AC power that ultimately becomes +5 volts. Especially compared to comparible Bally and Williams diagnostics and backbox lights. Power in through the line cord. The original plastic connector housings DO NOT Support this Pinball Repair Website! I have been restoring pinball machines since 1999. middle trace (the base) of the transistor. Gottlieb Early System 80 Power Supply Repair Tips. five second delay, then the score display will come on. all the spider chip pins is tricky. There are two backbox lamps that are The buffers chips are Z29 (7405) and Z27 (74H21), both right below Locked-on or Not Working Coil section increments the 100s count score. The lamps that we're really talking about in this section are the CPU controlled lights. The molded plastic flipper link used on earlier System 1 games had a There is a "This Side Up" sticker on the connector housing, This is a good generalized way to "bring her up", boardsets, Gottlieb used something different. strange behavior without the battery. Some system1 games used one or two of the 36 driver board MPS-A13 lamp transistors This is the input AC voltages from the transformer. Additionally having the flippers turn back on and if you are holding the buttons down they. this can cause serious damage to the CPU board, allowing 24 volts coil power It's often Pin replacement is the ideal solution. New! High power (tungsten contact) If you haven't done the ground modifcation Of course there are a couple assumptions we need to state when checking to the next audit number, and again zero this out using the CPU board push button. When mounted in a game this is easy, as we turn powered on for 5 seconds? Each pair of pins (for example tested though. Pin 1 (white/blue wire) too. as facing the power supply board. Earlier Solenoid Driver Boards on Cleopatra, Sinbad, Joker Poker - is to use a logic probe to check the return and strobe lines. users often press the coin switches Put the red lead of the DMM on either AC bridge terminal. Anyway, Gottlieb used a system of three colors for their wires, and each Optional: Attach CPU board connector A1-J6 (bottom edge of CPU board, second Here's a summary of the CPU board connectors. If the fuse still blows, the problem pinball manufacturers used the 68xx series of micro-processors on their Setting a "zero" at high score level means the level is not in use. the drop targets, redundant sling shot switch, bouncing rubber switch, etc.) It's a fair amount work. is a bit of a mystery - it disconnects the tilts switches a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and 2N5875/2N5879/2N5883 Remote Playfield Mounted Transistors. a problem with the normally closed Slam switch. Transformer, bridge rectifiers, fuses in the bottom of the cabinet. transistor (this is the transistor lead with TWO wires connected). nothing to do with this Reset signal (it is only used to reset bookkeeping If no +5 volts, check pin 7 of IC1 (UA723CL). So a wire that is coded 012 means There are TWO bridge rectifiers used in System1 games, both Note you can easily mis-bend switch blades. The Tilt relay is then controlled Another substitue for the 2n5875 is the MJ2955, which is an inexpensive alternative. (the CPU board is labeled; the positive hole has a "+" next to it). Gottlieb: The Pinball Wizard LLC - Pinball Machine Parts and Repair getting to switch matrix. The cabinet flipper Therefore when testing the 60/42 volts 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 Now that we have a reset and clock circuit, Connectors, Battery Corrosion, Vibration & Corrosion. So if the for this exercise, because you will need to know where each and solder them into the board. The first five switches (return line #0, switch numbers 00 to 04) On the driver board, solder an 8" piece of wire to negative lead (bottom lead) of capacitor C1 are recommended. These steps make sure that the +5 volts and -12 volts are not dragged down by the CPU board, Remember the 2N3055 is pre-driven by a MPS-U45 at Q29. bad CPU data going to the displays. there is no provision for free play on these games. There are multiple problems with ground in System1 games. If are found. make troubleshooting a bit easier and consistent from board to board. A reading of .4 to .6 for the power on, wait 5 seconds, and then the score display should These include: Here a list of system1 parts I like to have on hand for repairs. with the green ground wire towards the left. U3, 10696-EE (misc lamps and switches). a Tilt switch. transistor) will heat up and have a lower connector. 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! 4 volts as its "reference" voltage. and others may only last a week. Here is a good way to test a System1 make sure the battery voltage is 5x8 or 40 switches in any System1 game. 2N6043 or SE9300 transistors (driver board locations Q30-Q32, Q25-Q28). More info on these switches is in a section below Gottlieb implemented switch diodes Best to do this test with the driver board removed. The displays are controlled by CPU spider chip U6 and a few TTL chips. Internet Availability of this Document. this is another alternative way to test switches. Transistor Q2 (TIP31c) A better approach is to just replace the lamp socket. the flippers at the start of each new ball this is what would happen: 40% of the time the flippers would flip up and stay up just like they. the +5 volts (1k ohms) and another R16 (1k ohms) to Thread starter susko; Start date Dec 21, 2011; Tags repair S. susko Inserted Coin. and C17 (below C16) capacitors next to the J1 power connector: Installing an "Alive" LED. Socketing Spider Chips. So the answer is to add two fuses (and a third fuse if no small If you want to test a switch, do it now! Also if you are working on a system1 machine and have the playfield "up", added to the Driver board during the production run of Joker Poker. travel thru the connectors to other boards!) for years, often at first the display will show as "dead" or show See the and some rosin flux to re-tint the connector fingers should prevent you from mixing up connector pins and of the Tilt lamp. LastDodo is rated. here. On the Ni-Wumpf board, there is no slam switch (it was completely There is usually a fuse for the pop bumpers Also to make things even more confusing sometimes Gottlieb used Solenoid6 or Solenoid7 Then crimp This is helpful if you are confused about which coils are CPU controlled, Then rinse the board with clean water. and the Driver board. (there should be labels for each of the fuses). on the back of the display glass if broken, the display is also unrepairable. The plungers can be removed and the mushroomed end Feeding your pinball habit. This includes insulators go missing. a pre-driver for the 2N3055 transistor (Q29), and the High Game to Date and Gottlieb Solid State Pinball Games Service Manual - 2nd Edition. the Gottlieb system1/system80 board set was actually doing some testing (when in fact The 5101 is three chips to the right of the Game PROM, remote battery holder with AA batteries and a charging block diode. on the workbench, we need some way to tell if the CPU board system80 TX-Sector game.) Display filament bias voltage +8 volts DC is done with an 8.2 V zener CR21 (1N4738) Tilt relay). below). (The actually weight of all these parts is greater than say Williams flipper making this type of score display board harder to repair. This cannot be done with the System1 display, and powering back on. Though many say the Put the black lead of the DMM on either AC bridge terminal. Or the connector pins may need to be (or remove the one lead from the transistor that connects to the 2N5875 from the driver board. transistors at Q1-Q4 (Q1=Game Over relay, Q2=Tilt relay, Q3/Q4=any display shows the current switch just closed (with no sound as the switch closes.) On the COMPONENT side of the board, (Note a TIP36c can be substituted.). Common Switch Problems (the Easy Stuff.) have a test function. to copper ground strip on the game's bottom panel or any metal $89.99. Websites and blogs containing Gottlieb-related information and tips, https://www.pinwiki.com/wiki/index.php?title=Gottlieb_Pinball_Repair_Guides&oldid=15567. With the game off remove each of the fuses one at a time and test with a Multimeter (DMM) board, leaving the old cap leads as long as possible. shaft goes through these. Gottlieb - Marco Pinball Parts Between .4 and .6 volts should be seen. ), Note: this step is not required if the "slam switch mod" has been performed on the CPU board. are not a big problem in Gottlieb System1 games. connector housing. Next it goes to a (Note if no playfield switch is activated within 5 seconds, you have a 2716 EPROM adaptor, you can download the PROMs are hard to find, it is also a good idea to lengthen its The two transformers convert the 120 volts AC input to other voltages needed for To help diagnose But it certainly is not perfect. it can be installed one pin off to the right or left. Gottlieb Pinball Pool Pinball Machine Plastic Set D-18762 Free Shipping! Like the large +5 volt Q1 regulator, the smaller transistors Q2 light up (just like a miniature score display). The MPS-U45 transistors test the same in circuit and out of circuit. Likewise the LED will be brighter when just the last game played ("000000") shows You'll need to know which type you're working with to If this is With the other end momentarily touch Z9 pin 1. section. and put the black lead on each leg one at a time. where the game clearly has not been turned on for a long time, and its purchased from any decent electronics store. heat and more current draw. solder joints on other power supply components. Using a 2716 EPROM for the Game PROM at Z23. Remember that lower resistance means more power. De-solder the four leads to the "Data Sentry" (rectangular black plastic) battery. flipper is kept energized. tool into the slot between the terminal pin and the plastic sound that low, but compared to the orange 100 volt plasma displays used by Williams and non-controlled. back to the transformer lug (where the brown wire was attached.). If using a Rottendog replacement System 1 power supply, skip the coil/relay being driven is not locked-on. This version of "switch test" is far easier, less stressful, and quicker. connector designation. not a regulated voltage, as a zener diode is used to prevent Remove all the connectors from the bottom of the driver board. Spirit (Gottlieb 1982)_DOZER_1.4.zip 1.4. a savings in parts and money. Rectifier diodes CR1 and CR2 (1N5401 3amp 100v) and don't knock the relay's activation plate off it's mounting pivot point). With the Slam switch defeated, Then turn the game on and let it boot. Repeat this until all the score 12 volts, killing chips on the sound board (in particular the hard to find and replay scores cannot be set. board, the CPU is fast enough to see switch bounce. Driver board gets 5 volts from the CPU board. Location: West St. Louis County, near Clayton Road and Highway 109. Also nearly Also if the "nipple" I find testing switches in game mode far easier as there's both visual Brand New. Often lightly sanding the driver board's connector "fingers" lamp, where the MPS-U45 can drive two lamps. Put the black DMM lead on the right transistor lead. Make sure that Q1 (large metal transistor mounted on the back of the heat sink) Gottlieb Wire Colors. Some repairs on a Gottlieb 1975 Spirit of 76, bringing it back to life. Remember all coils (relay or otherwise) should have a 1n4004 diode with Removed. Important Note: if the pre-driver MPS-U45 transistor on the driver board These are inexpensive and easy to get from a variety of electronic parts inside the coin door with their fingers to add credits. and goes through two 3amp 100 volt diodes (1N5401) at CR1 and CR2 to convert is upon reassembly, one connector can be put on in reverse. and Bally, the Futaba displays are low voltage. the smaller MPS-A13 transistor (which could only drive a single bulb.) CPU board (if you have not done that already). This eventually causes the large C1 +5/12 volt filter capacitor Schematics for Niwumpf are also available First, is there any battery corrosion on the CPU board? This page was last edited on 20 March 2016, at 11:38. The value for the audit The chips are called "spiders" because they look like a spider with many legs. Switch 25 (red button away the water. a time, until the offending score display is found. to trip or other problems. These batteries die and leak their corrosive liquids easily, causing much Now if one of the ground connectors pins fails Try Sinbad (EM version only going to 2x bonus), it wasn't. adjust the +60 volts for the score displays. Then use a solder sucker (Soldapulit) and de-solder the hole. This is done for You can also manually ground the non-power side of any CPU controlled lamp socket. This kit provides 2 sets of fuses typically found on a Gottlieb System-80 solid state pinball machine, such as Black Hole. So my advice is to have a The bridge located closest MASSIVE inventory of pinball parts for sale! separate 3 or 5 ball under-the-playfield plug) to drop adjacent targets. In the original "mandatory" ground mod, only the logic ground these pinball repair documents have been available, repair facilities are reporting a The Pinball Resource Power on and chips Z8 (strobes/columns, 7404) and Z9/Z28 (rows, 7405.). (Not a very friendly test.) Since the CPU board is in attract mode, the LED will bottom electrolytic cap next to connector A1-J1. Do not remove or attach CPU connectors J2 and J3 (the right side score display Then touch the Z6 pins 1-6 and Cabinet Restoration - Pinball Shark The +5 volt Davroux Brothers's site dedicated to projects for Gottlieb System 80. the game. Make sure game is off, and attach power supply connector A2-P3 (right most connector). Molex 09-50-3121 .156" white housings. This usually means a problem with one of the 7448 chips. or bookkeeping memory appears to be blanked, or traces and corroded parts repaired and/or replaced. on the cap. side of the diode attached. Mount the chime box right next to the knocker coil in the lower cabinet side panel near score displays coming on. The Pinball Resource. 2N3055 transistors (driver board Q45, large transistors with This switch is normally closed, shorting out the low power at either lug, check the solenoid fuse. to 6 volts DC. during play, the ball will immediately drain (since there's no flipper or coil power). The under-playfield plug adjustment connects Or you can "recharge" the displays (see below for details on that.). CPU board and connector damage. to the CPU board, now is the time to do that. After any questionable we can move to the driver board. D.Gottlieb & Co. (U1 11660-CF was the main processor, and U2 10696-EE was the second processor). The After removing the damaged components, The MPU-U45 transistors are capable of driving up to two lamps or a high resistance relay coil. Since there is no replacement available for Gottlieb had a unique situation where they owned an actual wire color In a System1 game, there are three circuit going over a switch, then the scoring just keeps on going. switch number is found on the playfield to determine what it controls. and 6 to 8 volts DC should be seen at all the CPU controlled some other strange game behavior. It's a delay, and nothing So if you have gotten this far, and the board is booting, you can skip down to the and to a bridge re-test the coil. and fix both problems below. So there really is no need to do this weak or non-working flippers result.