[R-390] R-390A R390 Stuck Micro Switch

[Ed Rafferty]

My Motorola R=390A had the dreaded micro switch issue where it would not
shut off when switched from Stand by  to Off.
The previous care taker of this marvelous radio had purchased the
replacement switch but had not installed it when I acquired it. So I've had
the part in my parts drawer for a few years now, Waiting for the opportune
time to perform the surgery.

Today, while reading the"Approaches to the Dead Receiver" compilation, I
read the post from Mark Huss 12/30/2006 describing the (do not attempt this
at home ,professionals only) procedure of deploying the fine alignment tool
technique" to the targeted area of the ascribed "FUNCTION" label to release
the stuck microswitch.
One "calibrated" whack later, My 390A is now performing beautifully, as
advertised , the function switch is now back to normal. My spare switch
remains ,spare.
I used a wood block and a 8 oz ball peen to administer the corrective
inertia.
As a former Navy Avionics Technician, I have been trained in the benefits
of the technique described, and it worked for me today.
Thanks to Mr. Huss for his Post,

Ed , N4MDA  , USN, Ret.