Combined answer to several inquiries.

Once I'm satisfied that things work properly (mechanically and electrically), the board will be available as bare or complete (no kits). Bare and complete boards are separate queues. The bare queue is serviced much more quickly than the complete queue. For obvious reasons. I generally put medium and large boards in the build queue and they get built in that general order (some slight changes are made to batch similar boards for efficiency). The S3-7 is a medium-large board and subject to the build queue.

I had thought about attending a show other than the local PNW show but I have yet to make it to one.

I have been busy. Unfortunately, I am still busy. I did take an opportunity today to fit the board in a Black Knight and test play it briefly. I spent most of the day helping out others get their machines or boards diagnosed and/or working.

boards_297.jpg

It depends on what you are trying to achieve (the end goal).

I normally monitor things somewhat often if I am at home and working on things. Today, I was out and about at a local "repair party" to help others get their machines working to volunteer to the local show in June. Left my house at 10:30am. Returned home at 7:30pm. Long day. This is why you haven't seen anything all day.

Diagnostic differences:

• System 11N (nothing) uses a diagnostic digit to indicate state (normal or error). Requires S11-CPU-DDD (diagnostic digit display).
• System 11A/11B/11C use the three diagnostic LEDs to indicate state.

Sound/speech differences:

• 11N uses a background music board but uses the power amplifier on the CPU board. Requires S11-CPU-A20 (amplifier TDA2002).
• 11N and 11A use the same speech mix/balance configuration. Requires S11-CPU-DAC in 11A configuration.
• 11B has a different speech mix/balance configuration. Requires S11-CPU-DAC in 11B configuration.

This results in the following standard configuration options:

• 11N = SYS-011-CPU (main board) + S11-CPU-DAC (configured 11A) + S11-CPU-DDD (digit) + S11-CPU-A02 (amplifier).
• 11A = SYS-011-CPU (main board) + S11-CPU-DAC (configured 11A).
• 11B = SYS-011-CPU (main board) + S11-CPU-DAC (configured 11B).
• 11C = SYS-011-CPU (main board).

There is one non-standard configuration that provides a "universal" board (set) that works in all configurations (11N/11A/11B/11C). I refer to this as 11U (universal) and it's not really published (up until now). This consists of SYS-011-CPU + S11-CPU-DAC (11A) + S11-CPU-DAC (11B) + S11-CPU-DDD + S11-CPU-A02. Using the correct daughter boards plugged into the main board you can correctly support all System 11 configurations. I emphasize correctly because you can use the DAC-11A in 11B and DAC-11B in 11A. It just causes the speech/music balance to be incorrect but it still "works". See https://www.pinwiki.com/wiki/index.php/Williams_System_9_-_11#Voice_callouts_are_much_softer_than_music.2Fsound for reference.

RandyW contact me if you want the extra boards. If you're only interested in making a quick assessment of a System 11 game, what you have will work. If, for example, you use High Speed game software, you won't get the diagnostic digit and instead just three solid LEDs if the diagnostic LED is enabled. The information in the document is attempting to explain the differences in the configuration. R209 and Q209 sense the presence of the DDD and switch the diagnostic LED automatically. If the DDD is present, the diagnostic LED is disabled. If the DDD is absent, the diagnostic LED is enabled. The jumper W201 can also achieve this manually (as a jumper) or FIXED (for 11A/11B/11C).

I hope that better explains things for you.

WPC resets are caused by any number of reasons. Often, this kind of failure requires multiple failures to manifest. Like most catastrophic failures (I am not saying this is catastrophic but using that as an example), a cascade of failures combine to cause the catastrophic nature of the failure. Any one of those failures by themselves don't cause a failure that manifests.

In my experience, the most common cause is headers and connectors. Many replace the headers (either replace on the OEM board or purchase a new board), but they forget to replace the connector. The pins in the connector mate with the pins in the header. Both sides have plating that will have been removed through friction (inserts and removals) over the years. You must replace BOTH sides, otherwise you are only fixing 50% of the problem. While that may cause the catastrophic nature of the failure to disappear, eventual wear of the header and pins will likely cause the catastrophic nature to re-appear.

The other place people often forget is the other headers and connectors in the system. In the widebody machines (Flintstones is not a widebody), there is often a "Z" connector that eased manufacturing but created another connection point. The one that is mostly forgotten is that the CPU board has its own header and connector (J210). It's not just the power being delivered by the power board, but also the connection to the CPU board. After all, it's the CPU board that manifests the failure (i.e. it resets).

It depends on which type of transistor you want to use in the lamp columns.

• OEM boards use 2N6427 -> 27 Ohm@5W -> TIP42 (BJT).
• The MOSFET modification (described on Pinwiki) uses 2N6427 -> 1k Ohm -> MOSFET.

You can use either but you must choose BJT or FET. You cannot "mix-n-match". The area highlighted has silkscreen information on what to install for your desired choice.

randyw_s11_cpu_board.jpg

Some people read the silkscreen. Some don't. I guess I should add another little text blurb in the document to describe the difference. I always build the board with FETs. The FETs are simply more efficient and don't require the tremendous amounts of current flowing through the 27 Ohm resistor to the TIP42. In fact, with the FET you can use a 2N4401 (regulator transistor) instead of the 2N6427 (Darlington transistor). The Darlington is used to maximize the current flowing into the TIP42 B (base) to get it to transmit the maximum current through the CE (collector-emitter).

If this doesn't answer your question then let me know what is confusing about it and I will try to explain it in a different way.

At this time, it's probably not a good idea. I track things, but I don't track interest. If I did that, I would be overloaded with tracking too many things. Rather than centralize (I track) it, it is better to distribute (you track) it. I will post availability of the board, or at the very least progress.

I had five of these boards made.

1. One I built for me to do the initial "bring up" and bench verification.
2. One was sent to a forum member willing to take the risk of building a board (after bench verification by me).
3. One was sent to another forum member to test in System 4, 6, 6 and 7 machines.
4. One was sent to another forum member to test in at least a System 6 machine.
5. The last one was to another forum member to test in System 3 and 4 machines.

I actually don't have any more boards for additional testing, short of sending out the board I have. I currently have no plans to make more of this revision. I am waiting on feedback (constructive or critical) on the board and its functioning. I know I don't want to release the current revision so once I have the required information I will make the changes and have the next revision fabricated.

Some months ago I created a poll thread (https://pinside.com/pinball/forum/topic/dumbass-reproduction-boards-alternative-colors) asking for opinions on alternate colors. I did take this information and actually had some boards made. I will cross post some of this information to that thread as well.

Of course, I have been busy with other things so these boards were just low on my list. Despite the fact that they are the same revisions as the regular (red) boards, I still want to build one out to make sure the batch is good. This is probably overkill but it satisfies my quality bar and comfort level.

Here are the two alternate color boards working on the bench.

boards_298.jpg

Side by side (left to right) comparison of WPC-89 CPU board:

• OEM
• "standard" red (this is my bench board so it is using a ZIF socket daughter board)
• "alternate" green

This will also show some of the differences between the OEM and the reproduction.

boards_299.jpg

Side by side (top to bottom) comparison of WPC-89 Power Driver board:

• OEM
• "standard" red
• "alternate" black

Again, this shows differences between the OEM and the reproduction.

boards_300.jpg

Closer image of the green CPU board.

boards_301.jpg

Closer image of the black PWR board.

boards_302.jpg

The black board is definitely a preference / taste thing.

I have black CPU and green PWR boards in fabrication. I generally slip these kinds of alternate color orders when there is available (self-imposed) "space" in an order I place. After these two boards, I am considering a green S11 CPU board. That should cover most of the popular options in the poll from the thread. It does not cover blue boards though. After the green S11 CPU board, I probably won't be making any other colors or any more of the colors made. I don't like sitting on a lot of boards. I still have about 5x Banzai Run interconnect boards that were fabricated 2.5 years ago with no inquiries for over a year.

It may be possible to source all the components from a single merchant. In these supply chain times though, that may be a challenge. The supply chains are getting better but I would not call them "back to normal". For this board that you are interested in, the more "unique" components would be:

• triac = BT138-600E
• switching regulator = LM2678 (fixed 5V or adjustable) and supporting Schottky diode (80SQ045 or 90SQ040)
• (optional) flipper power relay = RTE24005 or RT424005 or other similar product

The transistors can also pose some problems but it looks like the TIP102 is somewhat available. The TIP36C might be a challenge. I currently see two merchants that have them.

Here are some tips:

• I would recommend using a "big box" merchant for components rather than using smaller merchants on marketplaces. Those smaller merchants can sell re-marked parts that are under-rated for their purpose. I helped one person who purchased a bunch of resistors from a small merchant and they were just plain wrong. I heard from another person that an oscillator purchased from a small(er) merchant was DOA.
• If you want to purchase from a single merchant, search for the more obscure parts first and find the merchants that have them in stock. Almost all the merchants will have the more common components (resistors, capacitors and diodes) in stock. It's the obscure parts that will likely give you some grief.
• If you decide to purchase from multiple merchants, you can minimize the merchant count by using the same strategy. Sometimes, it is cheaper to purchase from multiple merchants because the pricing benefits offsets the cost of shipping an additional package.
• If you are unsure about a component then ask. You can ask publicly (post) or privately (message).
  • Public pro: everyone can see and benefit from the response.
  • Public con: everyone can see if you asked a "stupid" question.
  • Private pro: nobody can see if you asked a "stupid" question.
  • Private con: nobody else benefits from the answer even if it is a "stupid" question.

  What might seem like a "stupid" question to you might seem like a perfectly reasonable question to someone else.

Hope that helps. The BOM for a board is provided as an online document in table format. You can copy/paste that into a spreadsheet and use that as a place to tabulate information and track progress.

No.

@ J_M_ has posted links to images of the layouts. The BOM can be deduced from those images but the purpose of those images is a guide to where components are located rather than counts and types.

I provide the link to the online document with the BOM when needed (through messaging). The privacy (and security) trained part of me says that if you publish a link publicly it will be broadcast and scraped by bots - i.e. you can't unpublish something. In the world of software security, you can't digitally unsign a block of data. You can revoke its use though. In the document world, I can't unpublish the content and I can't revoke its use either. Conclusion: don't publish the link.