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Bad KR32A's ?

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peteben:
Hello,

I just received a new SC1200 system to upgrade my old PS561. Included in the package were 6 KR32A remotes, however, only one of these seems to work correctly.
Out of the box, all the others would not flash the LED when pressing buttons. Removing the batteries got the LED flashing again, but the units are not recognized by the console. Pressing 'arm' for 5-6 seconds will result in two flashes when releasing the button; afterwards the unit is dead until the batteries are removed again.
Another difference between the functioning unit and the bad ones is that pressing buttons on the good unit shows a flashing LED while the button is held down, whereas the bad units only blink the LED once.

I've emailed support and am waiting for an answer, but wanted to check if anybody here had ever encountered this problem.

Thanks!

Pete

toasterking:
I have not used the KR32A, but I know that there are multiple versions of the KR19A and the programming procedure among them varies, so that may apply here.

But first, and please excuse my asking, have you replaced the batteries in the nonworking remotes or tried swapping batteries with working ones?  It sounds like the broken ones could be powering down due to undervolting as soon as you activate them.

peteben:
Yeah, it's the batteries. Although they all test fine (3V), I have one pair of batteries, that works in every remote. Strangely, this set a a slightly lower voltage than the pairs that don't work.
I have seen this type of strange behavior before, with my car's key fob. Tried several good batteries, it would not work. Eventually found one that did but don't ask me why.

I have ordered a bunch of batteries of different brands, and will try them.

Thanks for your response.

Pete

toasterking:

--- Quote from: peteben on September 05, 2019, 09:10:40 PM ---Although they all test fine (3V),

--- End quote ---
If you're just measuring the voltage with a multimeter when it is out of the circuit, you may not get an accurate representation of the battery's health.  The voltage of a nearly depleted battery may drop as soon as there is a current draw, so you need to measure the voltage under load.  "Real" battery testers do this.  You could also use a ballast resistor in parallel with the battery to load it as you check the voltage with a multimeter.  Google can help you with that.  :)

peteben:
Yes, I tried that, too. Of course, with these remotes, there is hardly any current draw until a button is pressed. Then I see voltage drop to about 5.5V. Strangely, the pair of batteries that does work in every remote drops further than the ones that don't. Of course, this is a rough measurement with a DVM, I might need to look at it with a scope to see what is really going on.

I also tried hooking the remotes to a USB power supply and they work quite well with 5V or even less.

So the mystery remains, and I am a bit peeved that X10 would ship products like that. These things should work out of the box!  Seems to me the were not tested at all.

Thanks,

Pete

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