JR servo DS8411 problems - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-07-2007, 12:07 AM   #1
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JR servo DS8411 problems

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I have a JR DS8411 servo that I am using for a steering servo in a 1/10 4wd buggy.
The problem I am having is it stops working intermittently.
It will work fine and then all of a sudden it will stop working, then start again. Everything is at random.
It is currently plugged into a Spektrum receiver sr3000.
It also did the same thing with an AM receiver.
I checked the plug and everything is nice and tight.

Any help would be appreciated.
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Old 04-07-2007, 08:04 AM   #2
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smell the servo if it has the burnt plastic smell the servo is toast
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Old 04-07-2007, 08:31 AM   #3
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Doesn't smell burnt, but I have not opened it yet.

Here are some more observations I have noticed

I have tried it with another radio and receiver. The results were the same.

It would work for about 2 minutes without problems, then things would start to happen.
It would all of a sudden stop. Then start etc.
Sometimes when it was turned to the left, sometimes to the right. The servo would also bounce, swing back and forth before it would settle into its neutral position.

Sometimes in neutral, it would not move when I turn the wheel on the transmitter. But if I gave the servo horn a push, it would go.
Also at times when it had stopped working. I would push on the servo horn with the transmitter in the neutral position. The servo would not budge, it would start to hum under the load I was applying and hold its position.
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Old 04-07-2007, 09:03 AM   #4
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Buzzing when pushing on it is normal as it is trying to center itself (or stay centered) when you apply pressure. There may be a problem with the gear teeth or the circuit board. I think the best thing to do is to open it up and take a look inside. You may find a broken gear, loose wire or a burnt circuit board.
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