Quoting Fred Cisin <cisin at xenosoft.com>:
[RE RS232
tester]
> I bought mine over 20 years ago. It failed after about a week due to
the
> _terrible_ soldering on the PCB. I
resoldered everything and it's
been
> fine ever since.
some things should be opened and examined BEFORE use.
I recently purchased some diagnostic circuit boards and they are terrible, I am
seriously considering getting a rework station and removing all the non lead
based solder and re soldering them with good old fashioned lead based solder,
the soldier joints are horrible and there is some odd contamination (perhaps
some different flux they have to use with it) that comes to the surface when you
re solder the existing solder joints (black flecks) I contacted the dealer i
got them from and they told me that was normal for the lead-free solder that
they use now 0.o