Originally Posted by Jim Cate
We have older Standard Horizon instruments on Insatiable II, including a Tri-data and a wind instrument. They have been excellent instruments, accurate and reliable... up to now. Recently, one of the button switches on the Tri-data stopped responding, and now one on the wind instrument has followed suit. These are small rubber oval shaped devices. One can hear and feel the normal faint "click" when they are pushed, but nothing happens. Most aggravating.
So, does anyone know if these switches can be reasonably repaired or replaced?
I'm not competent to work
on modern electronics
, even devices that are 20 years old like these... vision and steadyness of hand are not up to the task these days. I'm sure that I will be advised to simply replace them, but I prefer them to their more modern equivalents and would like to resurrect them.
It is the underlying switch action on the PCB which fails and many (but not all) of these PCB switch can be purchased as a discrete item as they are fairly generic in nature.
The older style ones were simpler in construction and thus easier to source and replace BUT finding a competent
fella (male or female) willing to spend the time and effort to carry out such repairs
is becoming harder and harder.
You got to find someone who is willing to pull the unit apart, take a gander at the actual switch and then try to source something similar without the benefit of a part number or even an IPC for the PCB. Then stick it on the shelf and wait for the part to arrive hoping it is the right item. Then solder it in and hope it works. It is doesn't, the better ones are unwilling to charge you for a non-repair and write off their time and effort. The best ones will repeat the excretes until a solution is found.
So yes, it can be done some times but not all times.
For a left field idea, you might try to get it fixed at an old school
GA avionics workshop. These guys are used to operating at component level and contrary to popular belief, don't aways have a detailed manual at their side telling how to do everything. They have to work it out themselves and have experience in finding parts
for "obsolete" electronics. However don't go to a upmarket modern workshop, they will stare at you blankly there if isn't an approved manual and manufacturers parts