On 6/24/2014 12:25 AM, Dave Caroline wrote:
There were various fluxes about, some were sold as
no-clean, meaning
once cold no (little) further corrosion. Inspect around and check the
condition and then decide whether cleaning is more damaging than leave
it on.
Dave Caroline
There were a lot of fluxes which were not a problem, just didn't
look
nice. Some hardened up, some stayed gooey and attracted dust, which was
a problem.
Also I don't recall any that were water soluble then. We always had
freon to clean the boards, which didn't damage the components. Only
risk I recall was that you didn't want to immerse anything that could
have flux on it, as it went into solution and got distributed over
everything, unless you used a flux bath machine which removed it from
solution.
So things like switches still had to be sealed or you could risk making
them not close. You never wanted to do that anyway, I'm just mentioning
what happened when you didn't seal such as switches.
So I don't know how or what you'd use to clean it that would not damage
the board worse than leaving it. Hopefully it is now pretty much lost
all the volatiles and is hard resin.
They never should have used any corrosive core in electronic manufacture
anyway, that should not be a problem. That would have caused problems
before now if they had used it anyway.
On 23/06/2014, Ian McLaughlin <ian at
platinum.net> wrote:
Hello all and thank you for adding me to the
list.
I am in the process of restoring a NorthStar Horizon machine. The boards in
this machine have a significant amount of flux residue on them - it
certainly appears that this particular machine was constructed from a kit.
My question is about this flux - should I be removing it as part of my
cleanup, or should I leave it in place? I know that this isn't a
super-collectible machine or anything, but I've never come across this issue
in any other machine in my collection, and I was wondering what the general
consensus was. I'm perfectly aware of the corrosive nature of the flux and
how to remove it, however this flux has been there for 35+ years.
Thanks in advance for your thoughts.
Ian