![]() For the most part, the only switches that I didn't Sources for most of the leaf switches that I needed I took an inventory of which ones needed to be replaced and which ones don't. The final deciding factor was the fact that my original ball trough switches were assembled wrong and they still work. I also read that micro-switches aren't a panaceaĮither in terms of reliability (in fact, when properly maintained, leaf switches can handle many more "triggers" than micro-switches). Option briefly until I learned of the cost for this type of upgrade either through purchasing the entire kit or the individual parts. Popularity of the original so they decided to crank out a couple thousand more. Upgrade kit is the primary (only?) feature of the Black Knight Limited Edition release For the most part, the LE edition Black Knight was produced based on the It is fairly commonly known that Williams released an upgrade kit which uses micro-switches instead of the leaf switches in both the ball trough and the multi-ball trough. Hence, many switches were operating through a contact between a gold-flashed tabĪnd a rivet which, over time, would cause the contact to wear and corrode especially since dissimilar metals were involved in the current transfer through the contacts. When the switches were assembled, theyįailed to ensure that the gold-flashed tabs were facing each other with the rivets to the outside. The contact tabs are riveted to the legs so that one side has a gold-flashed contact and the other side is the back of the rivet. Each leaf switch has two legs with a contact tab at the end of each Leaf switches (originally in their 1970's electro-mechanical pinball machines) which were assembled improperly. The history behind these leaf switches involved Williams using Only replace those but I chose to replace them all to ensure reliability (and proper gameplay).Īnother major category of repairs dealt with the original leaf switches installed in my Black Knight pinball machine. ![]() This was one of those repairs that falls into the second category above because I could have determined which coils were bad (not non-functional but weak) and Even this process was a bit daunting because there were quite a few "hacks" done to this machine and the coil sizes did not match what I had seen on other Black Knight I could increase the lifespan of the game and not have to constantly repair parts that may have worked fine but had issues.Īlthough most of the solenoids were not broken in this machine (the most common problem is that they can warp from overheating and compress the coil sleeve) I decided to replace Now that everything was disassembled I had a much better idea about which parts I needed to not only replace those that were broken or damaged but also replace parts so that Considering that I got a new set of plastics, all new posts, all new bolts/screws and a few other parts, I only reused the ramps and other related metal playfield parts. Below is a picture of the original playfield parts taken from the upper and lower As playfield parts were removed, they were placed on the bar that we have in the basement. I first began with the playfield(s) and all associated ![]() ![]() which was actually much easier and quicker than the re-assembly process to my chagrin. Is a transistor switching circuit that adust the amplifier's voltage rails between high current (lower voltage) 4 ohm speaker operation or lower current (higher voltage) 8 ohm speaker Luckily I have the full service manual for that receiver and the damaged circuit is fairly straightforward (it So this gave meĪ good excuse to start tearing everything apart so that I can rebuild it. When I turned the machine on, the receiver did not work and I quickly realized what had occurred. Noticing it (while soldering up some prototype GI relay circuits). However, this problem was quickly resolved when I mistakenly dropped a blob of hot solder onto the Sony receiver's circuit board without Considering that the machine had been fully playable during the prototyping stage and that I like to test the machine out with each additional effect, I found that I was playing theīlack Knight more than working on it.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |