Transmitter Low Battery Alarm (with new batteries) - help

[The Doctor]

Not sure if anyone can help me with this, or if anyone has had a similar problem.

I have a Futaba 3GR 2.4Ghz transmitter, which has performed faultlessly for the 2 years I have owned it. It has not been dropped and has never got wet. Recently the low battery voltage alarm came on. I have replaced the batteries with BRAND NEW Duracell AAs and the alarm immediately comes on.

I've checked inside and the connections are all clean and making good contact with the batteries. Inside the transmitter itself I cannot see any obvious loose connections. I've tried swapping the AAs for another new set in case one of the batteries was dodgy but this was also unsuccessful.

Any suggestions?

[SlowOne]

Have you checked that every battery you put in was a new one? Are you absolutely sure that you didn't mix an old one with a new one? Been there, done that...!!

If the alarm was working before the likelihood is it is working now, so if you can check the voltage of each battery individually to make sure there isn't a duffer in there, and then re-check they are all inserted the right way round, that would eliminate the obvious. HTH

[ianjoyner]

The low battery alarm goes off at 8.5V, check the voltage across the 8 cells in place, if they read 12+ as you would expect but you're still getting the alarm then try contacting Ripmax who may be able to help / suggest any known faults/fixes:

http://www2.ripmax.net/AR_Contact.aspx

[The Doctor]

I've put the same batteries in a separate transmitter (27 meg so can't use that one instead) and they read 11.8V, so it's definitely not the batteries. I've also connected the battery holder from that transmitter to the Futaba and the alarm still sounds, so it's also not the battery holder in the Futaba tranny. Going to have to get it looked at professionally I think.

[bodgit]

Can you get the back off and check the voltage where the battery wires are connected to the board

[Cardnim]

Guess here chum, but I reckon that one of the capacitors inside the tranny has gone.

This might give a low voltage alarm - and the capacitor went when the first "genuine" low volt alarm came on.

Check the capacitors and if one is gone, its an easy fix.

Hope it helps.

[metalmickey0]

Cant you just turn it off? Know know what the voltage is anyways