On Tue, 11 Jan 2011 21:18:28 +0000, Gareth Magennis wrote:

"Meat Plow" wrote in message
news
Yaesu VX-5R tri-band hand held. Momentary contact power on/off button.

I've owned this radio for 9 or 10 years. Recently I have to push
several times on this rubber on/off button to get the radio to come on.
But it always takes just one touch to turn it off. And the radio works
fine otherwise including all the other buttons. Just have to play
around pressing the button maybe three/four/five times. Sometimes it
powers on when pressed once! But always shuts off with just one easy
push. This indicates to me that it's not a problem with button contact
but rather a microprocessor problem.

Discuss.





Could be a microprocessor controlled delay programme whereby you have to
hold the on button on for longer to turn it on, than the off button to
turn it off. Perhaps because it is more important to screen out
accidental ons than accidental offs.

And/Or, If the button is dirty, and thus resets its state
randomly/rapidly during a single press, perhaps this results in favour
of the Off debounce and/or delay routines rather than the "On" routines.


Dunno, just a guess.

Yeah it's a good guess and makes sense however, the optional barometric
pressure sensing unit displays when the unit is off. So some processing
remains. That and the battery discharges faster when placed and the unit
is off over being removed from the unit even without the barometric unit
installed. So again even when powered on their must be some degree of
processing going on. Anyway, when it gets to the point where it is hard
to get the VX-5 to turn on I'll tear it apart. Things are pretty
compressed and it isn't the easiest of things to work on.


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