Williams system 6 mpu schematic Have any other system 7 games you can test the display board and mpu in to see if it's following? It could also be originating on the mpu board - check the strobe 3 signal there as well. If your game is not booting or solenoids not working, first test this! This completely redesigned board replaces the MPU board in all Williams System 9 through 11B games, NOW INCLUDING System 9-11 early games such as Comet and High Speed, view the full list below. for example IC17 has 7800. This post describes yet another adapter for installing readily available EPROMS in Williams System 6 and 6A games that use the full game-ROM space. 2) Replace the capacitors on all the boards and In addition Williams had data flowing through those connectors, so the tiniest loss of connection would lock the whole game up. I have a Blackout and Gorgar, and I've sent the boards out a few times for repair Mar 16, 2025 · Repairing Williams system 9 cpu boards First i would like to thank Scott Morash (U. This was the same before doing the bullet proofing. Compatible with multiple Williams/Bally games. 6 vdc" which is what is commonly known as the +12v unregulated supply. The line was open. I assume that is because of the different watchdog implementation for SYS6&7 According to the schematics SYS7 System 6a MPU board Schematic - PDF format, approx 370k. Williams/Bally #D-10881-xxx, D-11932, & D-11883-xxx. 01uf 50v ceramic capacitors at C2 and C4 with a . . Main System 3-7 Board mounted in Backbox and operating (Click on Picture for larger view). Easy to install, comes with instructions, schematics and NV Ram so there is never a need for a backup battery Benefits over the original Williams board: - Williams WPC type mounting holes for ease of install / uninstall - No batteries required for memory retention (no acid damage, ever!) - Simplified driver design using logic level FETs 2. CPU /DRIVER Boards Download the System 4 MPU Board Logic Diagram (Stellar Wars to Flash) Download the System 6 MPU Board Logic Diagram v4 Download the System 6 MPU Board Assembly Diagram v4 Download the Driver Board Logic Diagram (All games from System 4 to 6) v6. Having some issues with a Time Warp . The drawing shows the continued pulsing of the columns. Since the +5vdc regulator will keep the +5vdc going for a few milliseconds while the capacitor is discharging, the MPU needs to 4 days ago · System 9 MPU Williams used a single version of the System 9 MPU in all System 9 games. Looking for some help from anyone knowledgable on Williams System 9 or boards in general. MPU327 Combination Williams System 3, 4, 6 & 7 MPU and Driver Board Installation Instructions: With power OFF, remove the original MPU and Driver Board from the game Remove the two screws which hold the center support for the old MPU and Driver Board Remove the center support bracket. I've replaced all the 2N4401 and 2N4403 transistors in the reset circuit (Q1-Q6) I've verified that both white flipper ROMs and the 2716 chip game ROM are good. 45K subscribers 18 609 views 2 years ago Williams FirePower System 6 MPU and Driver Boards - Switch Matrix Error Repairmore The game Alien Poker from Oct '80 used the Syatem 6a MPU board (which was not very different from System 6). U. This is a designed to be a drop in replacement for all Williams System 3 to 7 pinball and shuffle bowler games using the original MPU board, or direct connection with the pinballpcb Main MPU Board. ( since 13/3/2002. Williams System 11 RESET circuit schematic. This board replaces Bally/Williams part number A-17651-xx (where xx is the game number). The new version has now a memory test and also a new extra test eprom for the " sound" section of the CPU board . 10V to +5 4 days ago · System 9 MPU Williams used a single version of the System 9 MPU in all System 9 games. This board replaces original part number D-7999-xxx. 95 Product is out of stock This document is a repair guide for Williams System 3, System 4, System 6 and System 7 pinball games made from 1977 (Hot Tip) to 1984 (Star Light), and includes the famous Black Knight, Firepower, Gorgar and Flash pinball games. System 6a MPU board Bill of Materials - PDF format, approx 145k. All this means is that for example a 5 volt Zener diode will block a reverse voltage until it exceeds 5 volts. Nov 17, 2019 · The photo below shows a schematic of the RESET circuit. If P6 of IC7 is not active and 5 is active, replace IC7. ) He did the testing of the new test eproms on his Williams 9 board. Does anyone have remastered Williams system 3-7 schematics? Not looking for any game or specific board in particular (just seeing which systems have been done already), just looking to print out some better schematics so I can stop squinting at the poor scans. Jan 20, 2004 · There aren't that many components that make up the logic supply portion of a System 3-6 power supply (a few more in a System 7 power supply), so a rebuild is not a big job. Check both sides of IC17 for pulses. I am not getting any sound from my Williams Comet pinball. Space Shuttle Williams Sys 9 Board Game/Sound Roms /2 6802 Micro $ 630. The 512K bi-polar PROMs have been unavailable for quite a number of years now as has the equipment to program them. I see that someone remastered system 6 (Firepower) at somepoint but can't find a good download link. No special tools or test ROMs are required to Space Shuttle Williams System 9 Board comes with Game and Sound Roms and NV Ram is completely redesigned and replaces the MPU board in all Williams System 9. What should I be looking for at power-up for LEDs on the MPU, or is that even of any value on a system 6? What should it do when power is turned on, dings, sounds, etc? Feb 28, 2018 · Leon Borre Williams System 11 Repair Repair Williams CPU-board type 11. Power supply voltages measure OK. That makes me think that the speakers, power amplifier chip, and volume control area all ok. I've replaced the 1J2 connector, 40 connector is good (although same symptoms observed with JUST the MPU board anyways). Once there, I purchased a Williams Bench test fixture (System 3-7) and the four Bally bench test fixtures (MPU, Solenoid, Light board and Display tester). I waited around and kept asking people if they knew whose it was or where it came from but nobody We would like to show you a description here but the site won’t allow us. Bad Cats, Big Guns, Black Knight 2000, Cyclone, Diner, Earthshaker, F-14 Tomcat, Fire, High Speed, Jokerz, Pin Bot, Road Kings, Rottendog MPU9211 replaces Williams System 11, 11A, 11B, and 11C MPU/Driver Boards. 2. The board is tested on our test bench. lisy. System 11 power supply schematic from Big Guns (games with Auxiliary power supply boards) to Cyclone. Jul 5, 2012 · Williams Pinball Repair Guides For history of Bally/Williams see Williams. Introduction to Section 4: This section deals with diagnosing and repairing problems with the MPU board in early Williams solid state games (System 3 through System 7). MPU327- This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, and 6 pinball games. Those connectors were designed for 25 installation cycles - after 40 years, that duty cycle has been greatly exceeded. 00 Add to cart Display Set for Data East/Williams System 11, #DIS011-E-R $ 275. Part 3 of the guide covers this in more detail. 2 That pesky +12volts If you look at the schematic above, you'll see a label for "+11. Anyone have System 3/4 experience? It's a system 4 board. Hope this helps. Benefits over original Williams MPU and Driver board – Eliminates the extremely problematic interconnect connector that fastens the original boards together – Eliminates the need to swap out game ROMs. Another improvement on the memory test. It can be used as a rebuild guide, but be careful to compare the parts listed to those on your power supply board and substitute as needed. Key Benefits – High Efficiency +5V section reduces heat dissipation – +5V supply now set from +5. Here is what I have done so far: 1) Checked all fuses in the machine to ensure they were the correct value. Connectors, Connectors, Connectors! Let me say it again, connectors! Rottendog has removed all System 7 games from the compatibility list until further notice. Repaired October 2008. May 20, 2023 · The Williams System 8 boardset was used in 1984 with only two games, the pitch and bat Pennant Fever and Still Crazy, a novelty game. pinball of people replacing the large filter capacitor that Williams System 9 - 11 Click to go back to the Williams solid state repair guides index. Some Bally games from 1988 to 1990 are also included as Williams This board is a plug and play replacement for the original Bally/Williams WPC-S Security MPU processor board. It will be similar to my 'GottFA' and 'BallyFA' MPUs for Gottlieb and Bally (see www. (As of right now this is only Firepower. This leaves more driver board solenoid connections available for playfield coils. 00 Add to cart Test your Williams System 11 pinball machine - check the voltages. Nov 17, 2022 · i see in Williams system 6 MPU schematics that every eprom/ram/pia on the board has one address. We would like to show you a description here but the site won’t allow us. 1uf 50v MPU board replacement for Williams System 11, 11A, 11B, & 11C. See game listing below to see which games this supply supports. Probably the most misunderstood component in the early Williams games is the Power Supply. May 22, 2018 · The address decoder IC - snip from the System 6 MPU assembly diagram (from the link above) - it's IC 15 by that diagram. I have tried to clean up the contact and reseat the sound chip, didn Feb 27, 2024 · Troubleshooting early Bally and Stern pinball machine switch matrix problems. 3meg. | Forum Topic by SchwaggsI recently picked up a F-14 and have started going though it to bullet proof it using many of the things I learned from Vid's System 3-7 thread. System 7 games have an additional PIA on the MPU board that is used to drive the Sound Board. The next thing is to check continuity. Williams System 3,4,6 MPU & Driver Board #MPU327 Product ID: PMPU-0002 (1) $479. When I say getting cooked - meaning it's very hot to the touch, system won't boot. On the bench: Leon's test ROM does the same with just 5v supplied - both LED turn on. Here is the blanking circuit in sys 6. This board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. Contents Introduction Games System 9 System 11 System 11A System 11B System 11C Recommended Documentation Manuals & Schematics Documentation Errors Theory of Operation & Schematics Schematics Parts Catalogs Service Bulletins Technical Info MPU Driver Boards Lamp Matrix Switch Matrix System 9 Switch Matrix Apr 15, 2011 · The MPU-controlled lights will only start to work when the MPU goes into "Play" mode and has passed the selftest. Thanks. S. Replacement System 3-7 Board uses a 0. System 8 is very similar to its System 6a MPU board Schematic - PDF format, approx 370k. SUBSIOIARY OF XCOR CORPORATION 3401 N. Replaces Bally Williams D-10881-XXX, D-11883-XXX, D-11392-XXX(5764-10881-00, 5764-12091-00, 5764-12206-00) We have sourced all original components to bring you the closest System 11 replac Sep 5, 2023 · Testing a brand new out of the box Rottendog MPU327. Jul 1, 2022 · Williams System 11 PinBot MPU and Sound Board Repair and Test Chris Hibler Pinball 2. 094″ think board instead of the original 0. To learn more about the differences, click here The test program works on all boards. 7-2240 NAME CPU BOARD ASSEMBLY PART NO. System 6a MPU board Assembly Drawing - PDF Low Resolution, approx 878k. Download information on my TZ DMD Controller Board Repair saga. Improved test-chip enables " flash test" of memory-chips. ) Since 8/10/2003, version 3 is released. This Sound board can be used in a wide variety of Williams Video games from 1980-1983 and System 6, 6A and 7 Pinball machines. MPU327- This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, & 6 pinball games Benefits over original Williams MPU and Driver board - Eliminates the extremely problematic interconnect connector that fastens the original boards together - Eliminates the need to swap out game ROMs. What information are you seeking? More Williams System 3 through 7 repair information is available! Go to my Resources page. This type of cpu board is really Created Date11/11/2000 3:08:22 PM Introduction to Appendix A: Firepower was the only Williams game produced that used the full memory addressing capabilities of the System 6 board. The only difference in power supplies after Cyclone is the lack of GI connectors on the power supply board (these were moved to the Interconnect board). One board that replaces both the MPU and driver. I read more posts on rec. He even gave me all the original paperwork for them and gave me demonstrations of how they work. Jun 8, 2015 · Other combinations supposedly indicate memory device problems, I think the possibilities are shown in the Williams 'Solid State Flipper Repair' general-purpose manual. I also identified a TON of blown Repairing Williams System 11 Pinball 1986 to 1990, Deel 1 Deze pagina is tot stand gekomen door het aanleveren van technische informatie van duizenden flipperkastliefhebbers en techneuten over de hele wereld. This covers Bally -17 and -35, plus Stern M-100 and M-200 MPU's. Nov 27, 2018 · Anyone have full schematics for Williams system 6? Please post. This board is installed into a Solid State version of Williams Hot Tip Machine. I did not find any board and it was time to correct and replace the old test eprom version. IC14 created and installed. P. Plug N Play. Testing Several Williams System 3-6 MPU's in Our 1977 LUCKY SEVEN Pinball Machine! Created Date7/10/2003 12:34:04 AM Solenoids in Williams System 3 – 7, 9, 11 and Data East For information on the Special Solenoids, see this page. This voltage is used by the reset circuit on the MPU board to determine if the power has been turned off. These lock ups will occur during attract mode as well as during play and at random times though more often than not after the machine has been switched on for say half an hour. This document is a repair guide for Williams System 3, System 4, System 6 and System 7 pinball games made from 1977 (Hot Tip) to 1984 (Star Light), and includes the famous Black Knight, Firepower, Gorgar and Flash pinball games. In place of these chips were several jumpers in closed frames, which can look similar to a socket at first glance. 95 Rottendog Williams System 11B/C Power Supply Board RD-WDP011C $159. Scope. Williams / Bally MPU Security MPU Board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. Then click on menu, then circuit diagrams. This document is a repair guide for Williams System 11 (and System 9) pinball games made from 1986 (High Speed) to 1990 (Dr. Display (11) Driver (9) MPU (1) Power (2) Space Shuttle Williams Sys 9 Board Game/Sound Roms /2 6802 Micro $ 630. Pin 18, the chip enable pin, also known as CS (chip select) was stuck low. Additional images available. Rottendog MPU9211 William’s System 9-11 Installation Instructions The Rottendog MPU9211 board is for all Williams System 9 and 11 games, and is an improved board over the previous MPU011A, now working on all System 9 and early System 11 games as well as the rest of the System 11 games. The goal of this article is to verify and if necessary to repair the cpu chip, the memory chip and all connected PIAs. boards. 6/10 (46 ratings/39 comments) [ Add Your Rating! ] Manufacturer: Williams Electronics, Incorporated (1967-1985) [Trade Name: Williams] This completely redesigned board replaces the MPU board in all Williams System 9 through 11B games, NOW INCLUDING System 9-11 early games such as Comet and High Speed, view the full list below. 00 Add to cart MPU9211 Williams System 11-11C MPU Board $ 540. Combining the driver board, sound board, and cpu directly onto one board eliminated several design deficiencies of the earlier System 3-7 boardsets; mainly the 40 pin interconnector, and extra wiring harness interboard connectors. This PDF Covers both WPC-95 and WPC-S. NVRAM Current draw greatly reduced LED ghosting fixed (in most situations). I measured the transistor and it read fine. R 95 - WHEN USED, IC14 REPLACES IC21. Be aware that the sound bd (SB) has its own power supply, just the "raw" voltages come from the same source like for the MPU and Driver bd. This board replaces is Bally / Williams part number A-17651-xx. New System 11 MPU to display and MPU to sound ribbon cables. Pin 6 of IC7 should be the inverse of P5 (rapid pulsing still). 00 Add to cart Williams/Bally A-12742 WPC89 MPU Board, Part#MPU089 With NVRAM $ 235. Rottendog replacement CPU for Williams and Bally System 9 and System 11 A B and C pinball machine. No battery needed. I'll post my progress and my questions for the gurus as I go. 95 Jun 13, 2024 · Repairing Williams C. The reason I question this is when re-reading Vid's guide on bulletproofing Williams systems, I noticed that System 7 Driver boards have 0-ohm resistors or jumpers on the switch column in the top right (W9-W16) (and the Jungle Lord schematics on IPDB confirm this). Mar 22, 2011 · This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, and 6 pinball games. This pin is tied to the collector of Q40, a 2N3904 transistor. I am pretty sure it is the same. Standard troubleshooting steps are: 1) Insure that the coil has voltage going to and from it – both sides of the coil. It comes with trimmer pots (blue) that allows you to balance the volume output between the sound and speech Introduction to Section 4: This section deals with diagnosing and repairing problems with the MPU board in early Williams solid state games (System 3 through System 7). This document is a repair guide for Williams System 11 pinball games made from 1986 (High Speed) to 1990 (Dr. The systems progressed from using simple digital displays and scoring to utilizing computers for advanced game rules, speech, and features still used today like multiball. I've tried to format it such that machine owners of all skill levels can use it to diagnose their game. I'm working through Vids guide to Williams systems and am progressing the mpu repair this week. MPU9211 Williams System 9/11/11A/11B/11C MPU Board This new replacement board will cover all System 9 games, as well as ALL System 11's (Including 11c's, 11b's, 11a's, and pure system 11's) The audio circuitry has been applied directly to the main board. Part 1 of this section contains basic troubleshooting techniques and advice. Single Combined ROM with game select by dip switch. Williams / Bally WPC89 MPU Board W/NVRAM is a plug and play replacement for the original Bally / Williams WPC089 MPU processor board and replaces Bally / Williams part number A-12742-xx. System 6a MPU board Assembly Drawing - PDF High Resolution, approx 3. System 6a MPU board Schematic - PDF format, approx 370k. 063″, which makes it much for rigid. System 3, 4, and 6. There are special diagnostic chips available that will allow you to test the MPU board with the driver board detached. 48 / October, 1980 / 4 Players Average Fun Rating: 7. Thanks to the cooperation with Oliver Kaegi from Switzerland. For example, if row 7 is to be tested, connect to J208 pin #8. At power on, no displays, MPU LEDs come on solid. In the example, row 1 is under test. 95 Rottendog Williams System 3 to 6 MPU/Driver Combo Board RD-MPU327 $499. The original MPU board that this board replaces is Bally / Williams part number A-17651-xxThe selected item is out of stock, please select a different item or combination System 6a MPU board Schematic - PDF format, approx 370k. 3 Download the Driver Board Assembly Diagram (All games from System 4 to 6) v3. William’s pinball System 11 U25 RAM schematic detail. 1977 - 1984 Williams System 3 - System 7 1984 Williams System 8 (Pennant Fever and Still Crazy) Williams System 9, 11, 11A, 11B and 11C MPU Board is completely redesigned and replaces the MPU board in all Williams System 9 through 11B games, INCLUDING System 9-11 early games such as Comet and High Speed. How this address computed. It used both a game rom at IC14 and 3 bipolar PROMS at IC21, IC22 and IC26. Test-IC to check basic functionality of the cpu and driver 'out' of the pinball machine. This is a drop in replacement power supply used in Williams pinball machines using the System 3 – 6 power supply board. This one is for Williams high voltage power supplies. Download the WPC HV DMD Controller Schematic. The MCP120-460GI/TO reset generator can be purchased from Great Plains Electronics. This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, and 6 pinball games. This long awaited CPU has a built-in amplifier for the early System 11 games like High Speed, Grand Lizard and Road Kings. 00 Add to cart Interestingly, Williams often didn't print their system 11 game manual schematics with the correct system 11 board! For example, many system 11c games had system 11b schematics printed in their manuals instead. Game ROMs are selectable via DIP switch – Comprehensive on-board diagnostics Aug 6, 2012 · Over the past few weeks, I’ve been doing a bunch of repairs on an old Williams System 6 pinball MPU and Driver boards. This leaves the Firepower owner (or your trusty board System 6a MPU board Schematic - PDF format, approx 370k. It was his idea to use the "on WMS System 3 to 7 MPU & Driver Combination $350 + $10 shipped *** out of stock *** Works in all Williams System 3 to 7 pinball games and some shuffle games. Same issue with random lock ups. I’ll have a post System 6a MPU board Schematic - PDF format, approx 370k. Please consult the System 11 MPU board BOM and schematics to determine exactly what components can be removed. This is not a throw away board. Dude). I saw this “Williams System 3-7 Unified CPU/Driver Board” laying on a table at NWPAS last weekend… and am wondering who makes this and where I can get 1, or maybe 3, lol. It's installed and has the correct dip switch setting for the table. 00 Add to cart Display Set for Data East/Williams System 11, #DIS011-E-B $ 275. Oct 9, 2012 · System 6 (Firepower) Backbox wiring System 6 (Firepower) Cabinet wiring System 6 (Firepower) Playfield System 6 (Firepower) Switch Matrix System 6 (Firepower) Lamp Matrix System 6 (Firepower) Logic Layout System 6 (Firepower) Game Instructions System 6 Williams Repair Document System3 CPU board Schematic - GIF 150k System6 CPU board Schematic This document is a repair guide for Williams System 3, System 4, System 6 and System 7 pinball games made from 1977 (Hot Tip) to 1984 (Star Light), and includes the famous Black Knight, Firepower, Gorgar and Flash pinball games. Promoted items from Pinside Marketplace and Pinside Shops! Hey modders! Nov 17, 2025 · The System 6A MPU is a System 6 board without buffer chips at IC9 and IC10. 2) Check that there is voltage from the coil at the connector … Continue reading "Troubleshooting the Williams And Data East Computer Controlled Solenoids" RD-MPU9211 $539. Also compatible with shuffle alleys like Alley Cats, Top Dawg, Gold Mine and Tic Tac Strike. Aug 19, 2020 · Working on a Williams System 6 MPU board that had some battery damage Can I replace the . No special tools or test ROMs are required to 3. But it supported 7 digit scoring displays and a redesigned Master Display Driver board, located behind the backglass on the back of the 'Lamp Board'. Nov 15, 2022 · i see in Williams system 6 MPU schematics that every eprom/ram/pia on the board has one address. We traced the Outhole solenoid to Bally Williams System 11N / 11A / 11B / 11C CPU MPU Board Plug and Play direct 1:1 replacement with all features from the original. This is a one-page cross reference that lists all solenoid connections, driver transistors and wire colors for all Williams Solid State games through Firepower. Rottendog boards are plug-and-play compatible with the original board set. 3. Connect a clip lead from any column connection on J206 to the broken row at J208. Williams reference #D-7997, D-7998, D-8113, and D-8161. Jun 7, 2014 · This document discusses the technical details and evolution of Williams pinball machines from Systems 3 through 7. I replaced power connector on MPU coming from power supply board to MPU board. I corrected the jumpers after tossing in an ST Microelectronics 6802, and set the jumpers to match my ROMS. dev ) On the bench I have working displays for System3 & 4 games, but for System6 & 7displays do stop working after a few seconds. Williams System 3,4 &6 Numeric Display boards are replacement LED displays for all Williams System 3 & 4 and most System 6 pinball machines. This implementation is similar to Williams System 11 Special Solenoid, however, unlike System 11 hardware, the MPU has no control over the switched solenoids (solenoids 17-22). Hi all, big newbie with the pinball bug bites! I've purchased a firepower and are doing the repair/restore over winter up here in saskatchewan, Canada. I noticed that the MPU board is an 11a board, which I am aware can be used in Taxi just fine. Here is the breakdown for Williams Repair Guides. 1 SOUND and SPEECH Boards Download the System 3/4 This document is a repair guide for Williams System 3, System 4, System 6 and System 7 pinball games made from 1977 (Hot Tip) to 1984 (Star Light), and includes the famous Black Knight, Firepower, Gorgar and Flash pinball games. A few minor modifications to the board may have been made, but it's essentially the same board for the entire 3 game run of Space Shuttle, Sorcerer, and Comet. We traced the Outhole solenoid to Jul 6, 2025 · How to use a digital logic probe on a SS pinball machine. All switches and chimes and solenoid appear to be working except the outhole solenoid. MPU327- This board replaces both the MPU board AND the Driver board for ALL Williams System 3, 4, 6 &7 pinball games. – ZERO surface mount components. Nice clean diagrams that are easily read. These are broken down into the major eras of Williams pinball machines, and should provide repair guides to almost all problems. Learn how to use a digital probe to troubleshoot issues on an electronic pinball machine circuit boards - simple instructions for someone who has never used one before. One driver board was known to have problems, and the other was supposedly a gone-over, upgraded, tested-good driver board, which cost a good amount of money. Prints are on IPDB yeah see firepower or gorgar or blackout. It also compatible with all Data East Numeric pinball games. Oct 30, 2016 · What is the best / most cost effective option for replacing the MPU / Driver board in a Williams System 6 pin with new boards? Rottendog? Are most new boards pretty much plug and play, or is it more involved? For example, I see that Rottendog's site says there were some compatibility issues with certain games. Do you have a logic probe? Follow the strobe 3 signal around the board, the 4069 chip is suspect but you replaced that right? See if its behavior is different from other strobes. You get 2 EPROMS with the special test fixture software on it. Lots more pinball at Mark's Pinball Page! Introduction to Section 3: To quote a popular comedian of the 90s, "More Power!". This board is a direct plug-in replacement for the original OEM power supply. There were actually two sets of MPU boards to fix and two sets of driver boards to go over. This document is a repair guide for Williams and Bally WPC pinball games made from 1990 (Funhouse) to 1999 (Cactus Canyon). 48K subscribers Subscribed Hot Resistors R101 through R115 27 OHM 2 WATT (odd#) 1J7 Williams System 9 MPU Space Shuttle (p23) Non scientific test touched each component after playing for about 15 minutes. Bullet proofed boards according to Vid's thread. games. The outhole switch is detecting the ball in the outhole trough. That's why you can run the SB selftest successfully. Driver board has been updated, new 40 pin female installed, all connectors re flowed Power Supply compatible with all Williams System 3,4,6,7,9,11A and some 11B games. Some Bally games from 1988 to 1990 are also included as Williams bought the Bally pinball name in 1988. Benefits over original Williams MPU and Driver board: - Eliminates the extremely problematic interconnect connector that fastens the original boards together - Eliminates the need to swap out game ROMs. Of this type of board exist multiple models. ) Scope. I don't have a sys4 schematic here with me at work. Sep 5, 2023 · Testing a brand new out of the box Rottendog MPU327. Williams WPC switch matrix diagram Next, consult the switch matrix circuit diagram. This seems like, hands down, the most elegant replacement for the original two-board, infamous 40-pin connector setup. MPUSEC- This board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. is in the schematics, the special solenoid logic is in the manuals. May 12, 2023 · The R/W (read/write) pin also had activity. The original MPU board that this board replaces is Bally / Williams part number A-17651-xx (where xx is the game number). If your MPU and driver board sustained damage from either battery acid leakage or bad repair, this new Rottendog replacement combination board is the answer. It covers the different systems, technical components, common issues, and repair techniques. A. IC7 pin 5 should be getting rapid pulses from the display PIA. 1 day ago · I have a re-import Williams Taxi that I am working through at the moment and have finished every board except for the back box interconnect board and the MPU. – All of our components match the original schematic component designators, so you Oct 6, 2014 · Same issue with random lock ups. Starting with System 6 games, Williams wired the transformers so that the only backbox change required was a jumper change to switch the game from 120 to 220vac operation. Everyone should do this first thing when getting any "new" machine. 7 games. diagnosis every problem on cpu and driver board for easy identification of what component failed. This type of cpu board is really Mar 16, 2025 · Repairing Williams system 9 cpu boards First i would like to thank Scott Morash (U. I do get a hum which changes with the volume control knob and the speech/sound mixer. lC22,ANO WILLIAMS ELECTRONICS, INC. Oct 30, 2014 · Williams 1980 by cold1 Alien Poker / IPD No. A complete 70 page instruction manual on how to perform all tests and complete test fixture schematic section. A Zener diode will allow current to flow in one direction and block it in the other until its Zener breakdown voltage is exceeded. CALIFORNIA CHICAGO, CORNELIA . I'm working on a replacement MPU for Williams System3 . May 10, 2020 · System 11 is a superset of system 9 and 7. Most of the information about chips sizes etc.