Williams Robotron (EU) Restoration 3

A video game arcade cabinet, also known as a video arcade machine or video coin-op, is the housing within which a video arcade game's hardware resides. Most cabinets designed since the 1990's conform to the JAMMA wiring standard.

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The Arcade Blogger
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Joined: Tue Jun 04, 2019 5:02 pm

Williams Robotron (EU) Restoration 3

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So I’m in the home straight here with my Robotron upright restoration. If you missed Part 2, you can quickly catch up here. In short, we left the cabinet last time having just used filler to tidy up the bottom edges, which were disintegrating quite badly, and I wanted to patch those up so that cosmetically, it looked more acceptable:ImageHere’s the Bondo product drying out, ready to sandSo while that was happening, I decided to tackle the coin door:ImageThe door itself is in good shape, but really needed a good strip down and clean upImageWith the parts removed and given a hot soak to remove the grime, I got to work on the steel door itselfImageUsing my rotary polishing tool, I gave the polish a good work over for 15 minutesImageVery pleased with the end result!Let’s turn to the cabinet itself. There’s a lot of patina on the cabinet, which shows it’s age and reflects the hard life it had on the arcade floor for many years. The plan wasn’t to make the cabinet mint, but to subtly touch up anything that glaringly stood out in terms of damage. This for example, I think is worth tidying up a little:ImageNot great. There’s a number of things one can do here, including filling, sanding and respraying. I wasn’t convinced that was the right way to go, as matching up and blending in paint was going to be difficultImageDecided that just painting the scrape over with satin black paint was the way to goAs I was there, I decided to add some filler to a gouge at the base of the front of the cabinet. To do this, I added screws in the space available to give my filler something to grip to:ImageThis will make any filler work much strongerSo talking of filler, by now my Bondo had dried, at the sides, so it was time to finish that cosmetic job up:ImageThe first job is to sand down the filler. Note it’s not perfect – this is deliberate, as the rest of the cab is far from perfect. I don’t want this repair to stand out too muchImageWith that done, its time to mask off where necessary. Here I’m about to spray the black partsImageTwo coats of undercoat and black satin later, remove the masking tape and this is the resultImageAllow that paint to dry overnight, then apply more masking tape ready for the red stripe….ImageAll masking tape removed, here’s the end resultI am very pleased with how that came out. Same process for both sides. To give you an idea of the striking difference this has made, here’s a before and after picture of both sides:ImageCame out great. Very happy with the end result!T-molding next. You’ve seen me do this a hundred times here on the blog, so just quickly:ImageOut with the old. This stuff was brittle and disintegrated as I started peeling it awayImageYou don’t have to do this, but I decided to paint the raw wood in black chalkboard paint before adding the new t-moldingImageHere’s our new t-molding ready to apply. 20 minutes later, we’re done!So with the cab now in a state where most of the repairs are done, it was time to bring it into the house. Now as you know, my games room sits at the very top of my house, with three flights of stairs to negotiate. It’s never an easy job. Given we are on lockdown, I had no choice but to persuade Mrs Arcade Blogger to help me get the thing up!ImageShe wasn’t too impressed with the whole situation, but we got there in the end without too many arguments or scrapes to the walls!ImageAnd in!So that was most of the painful stuff out the way. But now I had to work out where it was going to go. Cue a giant game of arcade cabinet Tetris!ImageNot sure how I managed it, but I got there in the end (final pic below)From here, it’s really a case of repopulating everything back into the cabinet:ImageWasn’t happy with the condition of the coin door surround, so decided to remove it and get it resprayedImageCoin door surround and lower cash box stripped, ready for paintImageMarquee light next. The fitting was in a bad state, and I had a spare LED strip needing a home, so decided to remove the old fitment and replace. This requires some wire cutting and re-routingImageHere we goImageLED lights get a bad rep when it comes to classic arcade cabinets, but the ones I use give a nice hue – very happy with thisImageReferring to schematics and some of the pictures I took when I removed everything over two years ago, I started to repopulate the PCBs, monitor and wiringThis all went well. There were a few hiccups including:The speaker which was hanging down by a single screw and interfering with the monitor meaning it wouldn’t degauss properly. The speaker wasn’t stock, so I replaced with a shielded one and refitted properly, which solved the monitor issue.The board was initially resetting, which I tracked down to a bad 5V line. A good clean of the connector and loom fixed this.ImageAnother issue was I found the game wasn’t saving high scores or settings. The board uses 3 AA batteries to do this job. After verifying the CMOS RAM chip (that saves settings and scores) was fictional, I tracked the problem down to bad contacts on the battery holder. A gentle clean with a Dremel tool solved thisImageVerifying good voltages and connections on the batteries. Problem solved!And that’s just about it. Here’s the finished result:ImageIt would have been easy to get a brand new overlay for the control panel, but I really liked the worn look of the old one, so it was just cleaned up and given some polish to bring out the coloursImageThe cab came with the original EU marquee, which is a slightly different size to the European one. I was also lucky enough to meet Larry DeMar, co-creator of Robotron last year, and was able to get him to sign it tooImageAs you will have seen in Part 1 of the restoration, the joysticks that came with the cabinet were beyond repair, and parts are no longer available for their unusual design. These are SlikStiks imported from the USA. They work very well and are perfectly acceptable. I do have a pair of NOS Wico joysticks which I acquired last year. I’ll be replacing these with those at some pointImageThe screen gives a nice bright picture after a chassis was sourced from SpainImageAged like a fine wine!ImageI’m out of space now, but couldn’t think of a better game to add to the collectionImageFinal picture of the finished resultSo there you go. One Robotron saved from destruction and now ready to play again!Here’s a before and after picture:ImageJoystick and panelImageCabinet, before and afterA very satisfying restoration considering the cabinet was going to be trashed when it was rescued in 1996. A few people I should thank for their invaluable help with this:
  1. Fellow collector Phil, who very kindly thoroughly went through the PCBs and made various repairs and converted the RAM to 4164 making the machine much more reliable. As well as technical assistance when I finally got to installing them back into the machine. I owe you several beers Phil!
  2. Larry DeMar for signing my marquee – the perfect finishing touch!
  3. Fellow collector James who was able to give live WhatsApp assistance when I needed to track down a few faults on power up!
  4. The long-suffering Mrs Arcade Blogger for the extra pair of hands in getting the thing up to the games room and not complaining too much when I took over the kitchen sink cleaning parts.
Thanks everyone. The finished result reflects your efforts.
Hope you enjoyed following the progress of this Robotron. She’s a keeper. To read the whole process from top to bottom, check out this page.Thanks for joining me this week – I’m off to set some scores!See you next time.
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