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In this video I show how to replace the Dallas NVRAM chips in Tektronix equipment.
Link to firmware procedures:
www.eevblog.com/forum/repair/...
Link to tekwiki for firmware files: (Links through to the individual model numbers)
w140.com/tekwiki/wiki/TDS600
w140.com/tekwiki/wiki/TDS700
Link to ebay listings of pre-built NVRAM replacements (No affiliation):
DS1250: www.ebay.com/sch/i.html?_nkw=...
DS1286: www.ebay.com/sch/i.html?_nkw=...
DS1486: www.ebay.com/sch/i.html?_nkw=...
DS1644: www.ebay.com/sch/i.html?_nkw=...
DS1650: www.ebay.com/sch/i.html?_nkw=...
DS1742: www.ebay.com/sch/i.html?_nkw=...