{"title":"Circuit Boards - Coil Savers","description":"","products":[{"product_id":"data-east-sega-ppb-1-high-voltage-transistor-coils-saver-version-1","title":"Data East \/ Sega PPB-1 - High Voltage Transistor Coils Saver - Version 1","description":"\u003ch3\u003eData East \u0026amp; Sega - PPB-1 High Voltage Transistor Coil Saver - V1.0\u003c\/h3\u003e\n\u003cp\u003eData East, and later Sega used a separate circuit board to manage the High-voltage coils.  Other pinball manufacturers used \"Snubber\" boards.  On the PPB-1 circuit board, the 50V coils are driven by those beefy \"TIP36C\" power transistors.  They held up pretty well, but if they did short out, there really isn't much fusing them.\u003c\/p\u003e\n\u003cp\u003eThe 50V starts off the transformer as 48VAC, where it is rectified on the PPB-1 board's BR1.  There is a fuse on the 48VAC input, and that's it.  When one of the TIP36c shorts out, and the corresponding coil locks on, it has to draw enough amps through BR1 to blow F5.  This will kill the coil, and strain BR1.  This board fuses the individual TIP36C and provides an LED indicator for each one\u003c\/p\u003e\n\u003ch3\u003eEasy to install.  Simply remove the plug(s) from J8, and connect this board onto the J8 header on the PPB-1.  Then plug the connectors to J8 on the HVTCS.  Connect the wire to any convenient Ground for LED indicators\u003c\/h3\u003e\n\u003cp\u003eThe HVTCS fuses the power to each coil.  Populate with 1-1.5 Amp fuses (I have personally had good luck using 1A SB fuses in these).  The next time a drive transistor on this circuit were to short, the 1A fuse will blow before more damage occurs. \u003c\/p\u003e\n\u003cp\u003eEach fuse has an LED indicator.  With a ground wire attached, the HVTCS will show which fuses are good.  Note:  not every game uses every HV transistor.  DE The Simpsons only uses two, and one is the knocker - which is missing on my game!\u003c\/p\u003e\n\u003cp\u003eShort video of this board in action \u003ca href=\"https:\/\/youtu.be\/U1uUrp3Zgt4?si=17zhCi25306dR8vF\"\u003ehere\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: right;\"\u003eBE9\u003c\/p\u003e\n\u003ch3 style=\"text-align: right;\"\u003e\u003c\/h3\u003e","brand":"That Old Pinball","offers":[{"title":"Default Title","offer_id":51369075867944,"sku":"TEST","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/HVTCS3.jpg?v=1769375962"},{"product_id":"special-solenoid-saver-board-with-led-indicators-version-4-1-williams-sys-3-11-data-east-sega-etc","title":"Special Solenoid Saver Board with LED indicators - Version 4.1 Williams Sys 9-11, Data East, Sega","description":"\u003ch3\u003eSpecial Solenoid Saver Board-version 4.1\u003c\/h3\u003e\n\u003cp\u003e***Note*** The Williams System 3-7 requires the 30mm variant\u003c\/p\u003e\n\u003cp\u003eFunctionally identical to version 4.0, but a bit more streamlined\u003c\/p\u003e\n\u003cp\u003eThe Special Solenoid circuit is protected by a single, 4A fuse.  If a switch that drives a Special Solenoid gets stuck on, that corresponding coil locks on, and heats up.  After several minutes, the coil gets so hot, that the insulation around the winding begins to burn and the coil resistance goes lower and lower until it's close enough to a dead short to finally cross that 4 Amp threshold and blow that fuse.  Of course, by then the coil is completely ruined and will need to be replaced.  Also the corresponding drive transistor (TIP) will likely be shorted, and the surrounding circuitry could also be compromised.  All for one stuck switch.\u003c\/p\u003e\n\u003ch3\u003eEasy to install.  Simply remove the plug(s) from 1J19, and connect this board onto the 1J19 header on the MPU.  Then plug the connectors to J19 on the SSB.  Connect the wire to any convenient Ground for LED indicators\u003c\/h3\u003e\n\u003cp\u003eThe SSB fuses the power to each coil.  Populate with 1-1.5 Amp fuses (I have personally had good luck using 1A SB fuses in these).  The next time a special switch locks on, or if a drive transistor on this circuit were to short, the 1A fuse will blow before more damage occurs.  Also, the pinball will remain mostly playable, except for that Jet bumper, or slingshot\u003c\/p\u003e\n\u003cp\u003eEach fuse has an LED indicator.  With a ground wire attached, the SSB will show which fuses are good.\u003c\/p\u003e\n\u003cp\u003eThe 30mm variant is taller, and works with all versions, but only recommended for Williams System 3-7, where the added height is needed to clear the flipper relay.\u003c\/p\u003e\n\u003cp style=\"text-align: right;\"\u003eBE3\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e","brand":"That Old Pinball","offers":[{"title":"Standard 18mm header","offer_id":51979362664744,"sku":null,"price":37.0,"currency_code":"USD","in_stock":true},{"title":"Taller 30mm header","offer_id":51979486363944,"sku":null,"price":37.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/IMG-8988.jpg?v=1774576921"},{"product_id":"solenoid-indicator-tester-fuse-board-williams-system-3-11-data-east-sega","title":"Solenoid Indicator \/ Tester \/ Fuse board - Williams System 3-11, Data East, Sega","description":"\u003cp\u003eThis is an extremely versatile tool for testing and\/or protecting pinball circuits where the solenoids connect to the MPU \/ Driver board with a 9-pin, .156\" pitch molex connector.  Commonly found on Williams 3-11, Data East, Sega, and some others.\u003c\/p\u003e\n\u003cp\u003eFor use as a Fuse Board:  Populate the appropriate fuse holders.  Note:  If not using as a fuse board, Jumpers SJ1-SJ9 will need to be closed.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"399\" width=\"299\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/542C1F38-5B67-4240-A1C2-C90C01C44BFA.jpg?v=1779574049\"\u003e\u003c\/p\u003e\n\u003cp\u003eFor Testing the MPU Solenoid Signals:  Connect to the header in question, and attach 5v to the Signal Indicators 5v connector point.  An active solenoid signal will light the corresponding red LED.\u003c\/p\u003e\n\u003cp\u003eFor testing coil power:  Connect to the header in question and attach ground to the Power Indicators Ground point.\u003c\/p\u003e\n\u003cp\u003eThis board comes standard with a 9-pin molex header.  If installing permanently on a particular position, clip the appropriate pin - Pin 2 for J11 and Pin 3 for J12 (pin 5 for J19, if you want to use it there).  If you are using this as a testing board, not dedicated to a certain position, a screw header can be installed, and 9-position pin strips can be provided.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/FullSizeRender_50956b9c-85e4-4a5f-82ca-d21e8062032d.jpg?v=1779577092\" alt=\"\" width=\"380\" height=\"343\"\u003e\u003c\/p\u003e\n\u003cp\u003eDescription of the variants:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard board.  Populated with the LEDs, and associated components.  Also will have a standard 9-pin, .156\" header.  The \"Key\" pin will have to be clipped when used in circuit.\u003c\/li\u003e\n\u003cli\u003ePigtail power cord.  Female 5.5mm barrel connector.  Couples well with the Breakout Header Board with male pigtail connector.  \u003ca href=\"https:\/\/thatoldpinball.com\/products\/williams-9-11-data-east-power-breakout-header?variant=51814066454824\"\u003eWilliams 9-11, Data East Power Breakout Header – That Old Pinball\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eFuse Clips.  All nine positions will populated with fuse clips, and the SJ jumpers will be left open.  Fuses not included.\u003c\/li\u003e\n\u003cli\u003eScrew Header.  Nine position, .156\" screw header.  Also included, three 9-position .156\" pin headers with the pins removed on positions 2, 3 and 5.\u003c\/li\u003e\n\u003cli\u003eAll Options.  Fully populated with all options.\u003c\/li\u003e\n\u003cli\u003eBare Board.  Completely unpopulated, if you just want to do your own thing.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"That Old Pinball","offers":[{"title":"Standard Populated board","offer_id":51855522627880,"sku":null,"price":35.0,"currency_code":"USD","in_stock":true},{"title":"Add Pigtail Power cord","offer_id":51855522660648,"sku":null,"price":37.0,"currency_code":"USD","in_stock":true},{"title":"Add Fuse clips","offer_id":51855522693416,"sku":null,"price":39.0,"currency_code":"USD","in_stock":true},{"title":"Add Screw Header","offer_id":51855522726184,"sku":null,"price":37.0,"currency_code":"USD","in_stock":true},{"title":"Add all options: Pigtail. Fuse Clips. Screw header","offer_id":51855526232360,"sku":null,"price":44.0,"currency_code":"USD","in_stock":true},{"title":"Bare board only - no components","offer_id":51855522758952,"sku":null,"price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0861\/0037\/7896\/files\/IMG-9003.jpg?v=1779577423"}],"url":"https:\/\/thatoldpinball.com\/collections\/circuit-boards-coil-savers.oembed","provider":"That Old Pinball","version":"1.0","type":"link"}