HP-67 1705A1636 very bad oxidation looking for suggestions
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12-29-2020, 09:33 PM
Post: #1
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HP-67 1705A1636 very bad oxidation looking for suggestions
Hi Everyone
We bought this for few reasons : it was cheap, the faceplate was in very good conditions, it had a battery door and you never know what you can find inside Turns out that the logic board, once put in a clean unit, was working Everything else is close to garbage, but it was no surprise as it was plenty of pictures We began a deep cleaning process with 50% vinegar, 50% hot water The result can be seen in the pictures At this point we would very much appreciate some hints from who is more expert than us Should we proceed what's your best suggestion for : Rebuilding missing pcb traces (there a few missing on the keyboard board and on the card reader board) What do you use for that ? The bakelite was very much deteriorated and although it can be clean well, it is not as smooth as it should be. We have found this to be a problem particularly in the card reader, as the card is not passing as it should be, sometimes it even stops in the middle because of the friction Has anyone succeeded in renovating this ? Last but not least, after the vinegar treatment and after the alcohol isopropyl rinse, even when a pcb looks clean, when it dries a kind of oxidation more like limestone shows up, how do you get rid of it ? Thanks for any technique you would like to share with us Pictures can be seen here : HP-67 1705A1636 very bad oxidation looking for suggestions Edoardo & Alberto |
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Messages In This Thread |
HP-67 1705A1636 very bad oxidation looking for suggestions - albertofenini - 12-29-2020 09:33 PM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - teenix - 12-30-2020, 12:04 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - rprosperi - 12-30-2020, 03:15 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - Massimo Gnerucci - 12-30-2020, 08:10 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - teenix - 12-30-2020, 09:40 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - [kby] - 12-30-2020, 04:31 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - albertofenini - 12-30-2020, 09:43 AM
RE: HP-67 1705A1636 very bad oxidation looking for suggestions - albertofenini - 01-11-2021, 10:11 AM
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