TDS-640 Oscilloscope Repair; Part 1, Acquisition Board Demolition скачать в хорошем качестве

TDS-640 Oscilloscope Repair; Part 1, Acquisition Board Demolition

Today we'll be starting a project that will either be an amazing success or prove to be an awesome disaster. Either way this is guaranteed to be a great challenge. I got this Tektronix TDS 640 Oscilloscope (notice there's no suffix like A, B, or C) for a really good price and of course, broken. Before purchasing it I did some research and knew going in that the issues with this line of scopes are the horrible SMD capacitors and the internal battery of the NVRAM chip dying after 20 odd years. But since I don't have a four channel scope and this one is rated for 500MHz and 2GS/sec, I wanted to give it a shot at a new life. In this Part 1 of what will hopefully be a three or four part series we'll tear the scope down, remove ALL the bad capacitors and any ICs that look to be too badly corroded or show signs of overheating, and also give the board a thorough cleaning. Part 2 will be replacing the capacitors and ICs, as well as repairing any bad vias and pads we're sure to find. If all goes well the scope should then pass most of the Power On Self Test with the exception of the processor fault, which should be the NVRAM chip. Replacement of that component will be Part 3 if we make it that far. Part 4 may prove to be the most challenging piece of the puzzle, as that would involve recalibration of the scope due to the lost data the NVRAM holds. I've been trying to get as much info on that procedure as possible but I haven't been a able to find a complete, start to finish, this equipment required, type of manual yet. I do believe a computer with a GPIB interface and some sort of Twktronix software is required, but any advice or guidance is appreciated, (unless that advice is for me to not waste my time, this hobby is already a fun waste of time for me). So thanks for watching and please subscribe if you'd like to see more! Always remember to be safe, explaining how you got those scars is only cool if you're Heath Ledger's Joker. On that note, and at the risk of upsetting some people, Heath Ledger was the greatest Joker ever, seriously. Anyways, always use caution when working with heat, electricity, radiation, explosives, a guy wearing a leather mask and wielding a bloody chainsaw.... oh, and always wear the proper protective equipment. If you're interested in any of the consumables I used today, (Seriously, you have to check out that spray can of Isopropyl Alcohol!) here's a few purchase links: MG Chemicals 824 99.9% Isopropyl Alcohol Electronics Cleaner, 16 oz Aerosol Spray https://www.amazon.com/dp/B005T8PL1Q/... MG Chemicals 8341 No Clean Flux Paste, 10 milliliters Pneumatic Dispenser (Complete with Plunger & Dispensing Tip) https://www.amazon.com/dp/B00425FUW2/... MG Chemicals Flux Pen Soldering, 2 x 10 mL, Amber https://www.amazon.com/dp/B077GVRMZQ/... MG Chemicals #3 No Clean Super Wick Desoldering Braid, 0.075" Width x 5' Length, Green https://www.amazon.com/dp/B00424S2C8/... MG Chemicals 856 Double Ended Technical Cleaning Brush with 4-1/2" cad Plated Steel Handle, Horse Hair Bristles, 1/4" Length x 5/16" Width https://www.amazon.com/dp/B008OA9BPS/...