AR7000 partial bind problem?

[astazou]

When I power up my heli (trex 600) the ar7000 reciever doesn't always come on. Actually, part of it always does. We know that this receive is a two part device having a small and large receiver body. Well, the small part always cuts on, the large one doesn't. It evutually does but after many attempts. Once it's on, everythings locked fine. Does any one have advice before I send it back to horizon?
Thanks,

[SansHeli]

When I power up my heli (trex 600) the ar7000 reciever doesn't always come on.
I have just received my Spektrum Module for my XP9303 and an AR9000 receiver. I was checking it out last night and had the same "partial binding" problem - it would bind OK and then when I turned the radio off and back on again to simulate "radio failure" and test the FailSafe position on the throttle servo, the small receiver led would start flashing like it does when binding (but dimmer) while the main receivers (2 in the main part of the AR9000) were on solid. I had to re-bind the receiver when this happened to get it to work again.

I then discovered that the RX battery voltage had dropped to about 3v and when I recharged the RX battery it was fine. It must have been the low voltage causing the problem. I thought that once the RX/TX binding had been done it was good for ever (or until you put the binding plug back in and did it again).

Lesson learned - I will never risk flying with a RX battery that is below 4.8v (never have anyway) if low voltage can screw up the binding. Secondly - I had read it before but was quite shocked when I saw just how long it takes for the receiver to re-set if you turn the RX battery off and on again. You will have to have quite a bit of height in hand to be able to regain control after a RX reset.

I have to admit that this has made a little nervous and I am having another look at the XPS specs, reading the forums and might even buy a module and receiver and do a comparison testing.

SansHeli

[Hughes500Bob]

I agree ..... you need to determin WHAT voltage the Rx is getting from the BEC or the Rx battery pack if you are powering it seperatly. You could also have a high power draw from a bad servo that is dropping the voltage down. Wire up a voltage meter to an open Rx slot using a spare servo extension or other and monitor the voltage. Could also be a bad solder joint somewhere in the BEC circuit or the Rx causing high resistance.

[lperagallo]

Specktrum specs say never to run at lower then 3.9 volts becuase the RX will not work.

[astazou]

I use a fully charged reciever lipo and radio. Plus once the reciever is on(both lights) it never goes off. This is me setting up the head, we're talking half and hour. However, if I cut the radio or BEC off and turn it back on, voila it happens. Then I have to unplug/replug over and over until it lights up. Once both are lite I'm good to go until I cut the power back off.