User contributions for Rubber jonnie

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18 December 2023

  • 11:1711:17, 18 December 2023 diff hist +64‎ Basic Troubleshooting - Oscilloscope basics ‎No edit summary
  • 11:1411:14, 18 December 2023 diff hist +4,855‎ N Basic Troubleshooting - Oscilloscope basics ‎ Created page with "As we become more confident in our troubleshooting, we find that we want to look at more complex signals and this is where the multimeter and logic probes are out of their depth, despite their usefulness. This is where our oscilloscope comes in, because it's like having a video camera looking at your signals in real time. Unlike Logic Analysers, which record and let you go back and watch, the oscilloscope can let you watch live, and snapshot events as they happen. Logic..."
  • 11:1211:12, 18 December 2023 diff hist +4,990‎ N Basic Troubleshooting - Reading Schematics ‎ Created page with "When we first look at the printed circuit board (PCB) of an Atari ST or similar retro computer, it can be quite daunting. All those chips, connected god knows how, what am I to do!! Well all is not lost, because many older machines, the ST range included, have original schematics available in PDF form, many of which are available right here on exxos forum: [https://www.exxosforum.co.uk/forum/viewforum.php?f=31 Useful schematics] Unlike datasheets, schematics show more..."
  • 11:0911:09, 18 December 2023 diff hist +2‎ THESE PAGES ARE UNDER CONSTRUCTION ‎No edit summary current
  • 11:0511:05, 18 December 2023 diff hist +2,852‎ N Basic Troubleshooting - Datasheets, what are they and why are they useful ‎ Created page with "When troubleshooting, we are often faced with using a multi-meter, logic probe or oscilloscope to understand what is going on. The problem is, how do we know what pins have what function? Here's where datasheets come in. Datasheets are provided by the chip manufacturers and describe in full detail what a chip does, how it's connected plus what voltages and tolerances it requires. You may also get circuit examples like below: [attachment=4]negativeispositive.jpg[/att..."
  • 11:0311:03, 18 December 2023 diff hist +5,034‎ N Basic Troubleshooting - Diagnostic Cartridge basics ‎ Created page with "Whilst the other troubleshooting techniques mentioned in this section are all extremely useful, sometimes a look into the hardware can be a big help, and this is precisely what the Atari diagnostics tools, a ROM based toolkit you can plug into the cartridge port allows you to do. This is my quite well used example: [attachment=7]Cart.jpg[/attachment] And as a modern equivalent it has the Atari diagnostics kits for ST/STE/TT/Falcon built in and selectable via the yel..."
  • 11:0311:03, 18 December 2023 diff hist −5,034‎ Basic Troubleshooting - Diagnostic Cartridge advanced troubleshooting ‎ Blanked the page Tag: Blanking
  • 11:0211:02, 18 December 2023 diff hist +5,034‎ N Basic Troubleshooting - Diagnostic Cartridge advanced troubleshooting ‎ Created page with "Whilst the other troubleshooting techniques mentioned in this section are all extremely useful, sometimes a look into the hardware can be a big help, and this is precisely what the Atari diagnostics tools, a ROM based toolkit you can plug into the cartridge port allows you to do. This is my quite well used example: [attachment=7]Cart.jpg[/attachment] And as a modern equivalent it has the Atari diagnostics kits for ST/STE/TT/Falcon built in and selectable via the yel..."
  • 10:5510:55, 18 December 2023 diff hist +551‎ N A good video on basic troubleshooting ‎ Created page with "For those of you starting out in retro repairs, there are some good channels out there on YouTube. Personal favourites of mine are Adrians Digital Basement, and Noels Retro Lab. I thought this video was particularly good for its basic troubleshooting process: [https://www.youtube.com/watch?v=wr22g56qslE Basic troubleshooting] Take a look at what Noel does, starting with voltage checking at the beginning, and how he refers to schematics and looks at the circuits and te..."
  • 10:5210:52, 18 December 2023 diff hist +4,859‎ N Basic Troubleshooting - Logic Analyser basics ‎ Created page with "As promised, here is a very basic overview of what a logic analyser (LA) can do for you, and what it's purpose is. Firstly, what is it? If you've read other items in this series, you will have seen me discussing a logic probe, which can show you different TTL states on a single pin using a visual and/or audible signal. Imagine then a logic probe with 8 or more channels that can not only visualise the value of 8 or more TTL states at once, but also allow you to use soft..."
  • 10:5010:50, 18 December 2023 diff hist −6‎ Basic Troubleshooting - ST basics - The Power Supply ‎No edit summary
  • 10:4310:43, 18 December 2023 diff hist −101‎ Basic Troubleshooting - ST basics - The Power Supply ‎No edit summary
  • 10:3510:35, 18 December 2023 diff hist +7,468‎ N Basic Troubleshooting - ST basics - The Power Supply ‎ Created page with "For all its complexity, the Atari ST has some fundamental areas we can focus on when we start to troubleshoot a sick machine. It is assumed that you have basic skills with a multi-meter before attempting the troubleshooting described here and can use one to carry out both continuity checks and voltage checks. The first area to check is power. Note that the Atari ST has many different power supplies, many which are documented here: [url]https://www.exxosforum.co.uk/atari..."
  • 10:2610:26, 18 December 2023 diff hist +2,080‎ N What is TTL and why is it important to my Retro Computers ‎ Created page with "TTL, or Transistor Transistor Logic (REF:[https://en.wikipedia.org/wiki/Transistor%E2%80%93transistor_logic Transistor–transistor logic] is the core technology used in the chips used within many of our favourite retro computers In basic terms, TTL translates voltage levels into binary, 5V being 1 and 0V being 0. It isn't quite as simple as that though, as the 5V & 0V scenario is what would be the case in a perfect world! In reality the binary 0 is anywhere between 0..." current
  • 10:2310:23, 18 December 2023 diff hist +1,414‎ N A recommendation for a basic Multimeter ‎ Created page with "Whilst living in temporary accomodation, and with all my usual tools in storage, I struggled to work on a couple of machines. I bought a very cheap multimeter, it cost something like £6 delivered, but I knocked it on the floor and its less than robust construction really did show me that a device that cheap has limits. It did me a turn, but it's now a bit erratic so I started looking for something better, and with the hindsight of my cheap purchase I knew I had to be..." current
  • 10:1910:19, 18 December 2023 diff hist +162‎ N THESE PAGES ARE UNDER CONSTRUCTION ‎ Created page with "Please note that the pages below are under construction and may contain errors and be missing images. Please be patient, this is a work in progress. The Admins."
  • 10:1110:11, 18 December 2023 diff hist +41‎ Basic Troubleshooting ‎No edit summary
  • 10:0510:05, 18 December 2023 diff hist +2,393‎ N Basic troubleshooting - Multimeter Comparison ‎ Created page with "I'm sometimes asked the question "How much should I spend on a multimeter?". Of course the question isn't quite as simple as that, because if you want a good brand like a Fluke, the cheapest I found on Amazon was £80, and if it's something you use infrequently, then that price is really rather a lot to pay. At the other end of the scale, the cheapest general purpose multimeter I could find on Amazon was £4 plus £1 delivery. That's just £5 for a multimeter, but that'..."
  • 10:0410:04, 18 December 2023 diff hist +9,969‎ N Basic Troubleshooting - MultiMeter basics ‎ Created page with "The multimeter is one tool that is an absolute must have when troubleshooting, simply because it's so versatile. Also, these days, unless you opt to buy something expensive from the likes of Fluke or Tektronix, multimeters are very inexpensive, and a quick search on Amazon shows devices starting at about £10, which for a beginner with a limited budget is quite suitable. What can a multimeter do for us then? 1. Measure AC (Alternating Current) & DC (Direct Current) vol..."
  • 10:0110:01, 18 December 2023 diff hist +8,706‎ N Basic troubleshooting - Useful tools - Read this 2nd ‎ Created page with "Welcome to the basic troubleshooting section. If you're here, then you're here to learn, and that's great. It may be you're new to the world of retro computing, and have a machine that is not behaving, and perhaps won't boot, but being new to the scene and perhaps without any experience with electronics, you need to understand what tools you will need to help you troubleshoot. In terms of some of the tools you need, there is an expectation you have some essentials such..."
  • 10:0010:00, 18 December 2023 diff hist 0‎ Basic Troubleshooting - Checklist ‎No edit summary current
  • 09:5909:59, 18 December 2023 diff hist 0‎ Basic Troubleshooting - Checklist ‎No edit summary
  • 09:4109:41, 18 December 2023 diff hist +11‎ Basic Troubleshooting - Checklist ‎No edit summary

17 December 2023

16 December 2023

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