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+--- Thread: HP67 black cable broken (/thread-3198.html)
HP67 black cable broken - Uli - 02-25-2015 09:04 PM
Good evening HP fans,
today I have started a big project. I have repaired the card reader of my HP67. Thanks a lot to Miles Davis.
Unfortunately a black cable is broken during this work.
Does anybody knows, where this black cable has to be fit to?
Hope you can help.
Kind regards
Uli from Northern Germany
RE: HP67 black cable broken - Geoff Quickfall - 02-25-2015 09:17 PM
First, always take pictures as you disassemble. Now that the lecture is finished :-)
The solder point directly adjacent to the red +ve power wire immediately to the right in the first photo.
Also, is that blue copper sulphate residue on the other solder points? If so clean it off before reassembly.
Geoff
A caveat, their are a few different circuit boards floating around and the contact of -ve and +ve may be reversed. Since the red wire is still attached it is obvious in this case. More need to photo all aspects during disassembly!
RE: HP67 black cable broken - Uli - 02-25-2015 09:23 PM
Hi Geoff,
to make no mistakes. This one? See white arrow.
The "blue" is no cupper. Only reflections.
Many Thanks
Uli
RE: HP67 black cable broken - Geoff Quickfall - 02-26-2015 12:37 AM
Yes! Under a magnifier you should see part of the remaining black wire in the centre. So vacuum up the solder with a de solder bulb or braid.
Then retin and solder when ready.
I actually de solder these prior to restoration so that I can clean the keyboard separately from the framework housing.
Cheers, Geoff
Another trick, if the solder points at the receptacle end need new wiring, plug the charger/wall wart into the calc but not the wall! This will hold the pins in place when you heat the solder.