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weird spektrum receiver problem

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Old 08-18-2014 | 12:49 AM
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dx6i dsmx fully charged batterys, brand new ar 400 just out of the package. brand new mpi switch with charge plug,nimh battery with full charge at 6.55 volts. I have three other ar 400s they work great for me never a problem. what is going on is I bind the receiver from about ten feet away everything goes as normal ,light goes solid nothing different from my other receivers. when I plug all four servos in its fine until you start moving the sticks around , then it just goes black no flashing lights then it comes back online. if I only plug two servos in everything work just fine no black or brown outs. three servos goes black. I have tried about six different servos with the same effect. cant tell you how many times I have rebound receiver. I have tried another fully charged battery another ar 400 and a brand new six channel out of the box same thing. thought it might be my transmitter but I tested it with my other planes the receivers take up to nine volts so I don't thik that has anything to do with it I also bypassed the switch used strait battery this is a first for me any help would be appreciated thanks
Old 08-18-2014 | 05:02 AM
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Sounds like the battery is not fully charged. You always need to check a battery under load. So when you hook up all the servos it's just too much load for the charge.
try and cycle the new battery a couple of times
Old 08-18-2014 | 05:30 AM
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If I understand your post, you've tried different receivers and different batteries and different servos in this plane? And your transmitter works fine with other planes? If that's right, about the only thing left is any extensions you have in this plane. For the sake of thoroughness, I'd cycle the battery to be sure it's a good battery, then check the amps that your servos are pulling with a multimeter. It's simple enough to wire up a harness to do that with. Then try eliminating extensions to see if it works when you take one away.
It's also helpful just as a general setup tool to make a servo plug lead for your meter so you can monitor receiver voltage while you move the sticks. In your case, that will tell you what's really happening in your system. If you still show 5+ volts when the receiver goes black, then you can eliminate a bad battery or servos drawing too many amps.
Old 08-18-2014 | 08:33 AM
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I believe it is the batterys I have used two nimh batterys to test this system and the same thing. these batterys do have some age on them. plugged in a fairly new five cell six volt NiCad and it worked just fine. thanks
Old 08-18-2014 | 10:15 AM
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I'd still try to verify that. It's easy to solder up a test lead for your meter with a servo plug on the end. That will let you see what voltage your receiver is actually getting. If the old Nimh drops substantially when you pull on a servo, then you've found your culprit. If not, connectors are the likely suspect. I'm leery of flying anything that has shown a problem without positively identifying that problem and being sure I've eliminated it.
Old 08-18-2014 | 12:54 PM
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hey jester sounds good but went to my local shop bought a new battery and everything is fine almost got it all ready to go
Old 08-18-2014 | 07:01 PM
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I'm glad to hear it's working now, but my point was that you aren't completely sure that you've fixed it. Let's say the issue is actually a connector that's a little too loose on your switch. You unplugged it and plugged it back in, creating a new good connection, but the problem could come back in a few weeks due to arcing causing corrosion on the connector. Or if you have a servo that's drawing too much current this new battery may be able to handle it and prevent a brownout, but eventually the servo will fail or you'll get a brownout at 1/2 charge when you shouldn't. That's why I suggested that you still do some diagnostic work to be sure you identified the problem correctly to begin with so you don't get a surprise later.

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