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All Forums >> RC Helicopters >> Electric RC Helis >> Walkera Helis - Dragonfly, etc.. >> 22e Receiver Problem
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22e Receiver Problem - 4/28/2006 11:08 PM   
jshudson


 

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From: , CA, USA
Status: offline 		My 22e jumped up on it's own accord and slammed into the wall (or it could have been pilot error, who knows?). Anyway I replaced all of the damaged parts but I think my receiver may be broken as well.

Everything seems connected correctly but when I throttle up (motor disconnected) the blade pitch doesn't change. The servos make a slight whine but no movement. Left/right/forward/reverse and all three servos move fine.

I have the front servo connected to connector 1, left rear connector 2 and right rear connector 3 (looking from front) and this seems to be the correct connections.

Any other tests/diags someone can recommend before I buy a new receiver and try that?

Thanks

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RE: 22e Receiver Problem - 4/29/2006 2:22 AM   
krisma



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From: McDonough, GA, USA
Status: offline 		check your plt rheostat (top left silver knob) and make sure it's not all the way up, and check your throttle trim and make sure that's not all the way up. if it's all the way up (lots of throttle preset) you might not notice any movement because there is so much throttle preset. Turn everything all the way down and watch the swashplate for up and down movement.

you might also have the pit silver knob set high which again gives it more pitch and then again you won't notice pitch change because it's already set so high.

don't forget to verify dip switch positions

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RE: 22e Receiver Problem - 4/29/2006 6:23 PM   
jshudson


 

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Status: offline 		Krisma:

Hmmmm.....this is strange.

I did all of the checks you recommended and still it didn't work - no blade pitch change at throttle up.

In the process however I made the mistake of powering on the receiver with the transmitter off. When I turned the transmitter on the receiver reset and the pitch now changes with throttle.

Flakey electronics or normal behavior?

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RE: 22e Receiver Problem - 4/29/2006 8:18 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		definitely not normal, but it has happened to me before.

I have two stock batt's and I notice that with the original the receiver behaves strange, mainly just blinking led, but with the new second one I have no such problem.

Just an observation from my situation, don't have experience with this situation

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RE: 22e Receiver Problem - 4/29/2006 8:22 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		hmmm, one more thing... keep an eye on your 3d switch and make sure it stays in the 'N' position.

I almost took my head off one time. I kneeled down to straighten out my blades (throttle all the way down) but I brushed the controller against my leg as I kneeled and tripped the 3d switch causing it to spool up really fast. Fortunately I was faster in flipping the switch back and disconnecting the batt just in case.

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RE: 22e Receiver Problem - 4/29/2006 8:58 PM   
bonjovi


 

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From: ireland, IRELAND
Status: offline 		hi , i have the 22e and all was going well, i was happily hovering away using a lipo 11.1v 2200Mah when all of a sudden the main rotor stopped working !!!!! everything else is ok and i dont know what to check i even connected the battery straight to the motor and got nothing im thinking it might be a reciever problem ,im not sure has anybody got any ideas

thanks
Gary

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RE: 22e Receiver Problem - 4/29/2006 9:04 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		does your receiver have a steady, blinking, no red led??

are you running the lipo on a stock motor or brushless. If stock then it could be an overheat issue. How long were you flying it?

are you getting any voltage out of your batt? does the battery pack look ok? for a lipo make sure you do your first few recharges outdoors away from stuff in case of fire/explosion.

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RE: 22e Receiver Problem - 4/29/2006 9:10 PM   
bonjovi


 

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From: ireland, IRELAND
Status: offline 		hi,
have just checked again the heli initiates the red light blinks and then stays on if i power up the tail rotor goes and the collective works but no power to main rotor i was flying for about two mins on the lipo witch was fully charged

thanks
gary

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RE: 22e Receiver Problem - 4/29/2006 9:22 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		i don't know if this is recommended or not, but I would secure the heli down to table, switch the leads from the tail and main rotor to verify that it's not a receiver output problem. if the main rotor still doesn't work after the switch (and tail does work) then the main could very well be fried.

be careful

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RE: 22e Receiver Problem - 4/29/2006 9:43 PM   
bonjovi


 

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From: ireland, IRELAND
Status: offline 		i just swapped the leads over and nothing the tail rotor went but not the main, looks like a fried motor its a stock motor not brushless but has been working fine on the 11.1 v lipo there was no smell of burning or anything the heli is only three weeks old

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RE: 22e Receiver Problem - 4/29/2006 10:10 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		how long where you flying when this happened? maybe it did fry, which is what it sounds like. Let me just say that I don't know if the receiver puts out different voltages to the main and tail, I don't think it does which is why the resistor is on the tail motor.

I'd suggest posting this on the 'let's talk 22e' thread, where there a bunch of people there with heavy modding/repair experience. But as you saw, looks like a motor change.

rcandme.com

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RE: 22e Receiver Problem - 4/29/2006 10:18 PM   
bonjovi


 

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From: ireland, IRELAND
Status: offline 		hi ,i have just ordered a new one from ebay 9 us dollars thanks for your help was flying for about 2-3 mins but probably had 4-5 flights today no problem and then she just went down and will not fire up again, bit of a pain as i only put new parts on it yesterday after waiting a week from ehirobo.com

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RE: 22e Receiver Problem - 4/29/2006 10:33 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		what ebay site did you order from?

rcandme.com is awesome, but he also as an ebay store. if you go to his website and it shows zero stock call the customer service number and Tim will check his inventory and adjust the website stock. He's done this a few times for me, and they always ship priority mail so I've never waited more than three days for a part.

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RE: 22e Receiver Problem - 4/30/2006 12:07 AM   
jshudson


 

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From: , CA, USA
Status: offline 		I have the brushless motor and lipo battery.

I went through 3 motors before deciding on upgrading. I burned out 2 with the original battery and 1 with the lipo. So far though since the upgrade no problems.

And BWT after figuring out how to trim it my heli is now flying great.

Thanks for all the help.

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RE: 22e Receiver Problem - 4/30/2006 1:15 AM   
krisma



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From: McDonough, GA, USA
Status: offline 		JS

what tips do you have for trimming?

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RE: 22e Receiver Problem - 5/1/2006 4:06 AM   
jshudson


 

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Status: offline 		OK, here's how I trimmed it. Keep in mind I tried to logic it out based on blade position and failed miserably. So I took the advice from another thread and did this:

1) Set PLT & PIT to top dead center.
2) Unscrew 3 linkages from servos.
3) Set all trim levers to center setting. Power on receiver then radio. Wait for beep.
4) Power off all electronics.
5) Make sure ball linkage lengths are aproximately the same.
6) Connect rear servos to linkages at as close to 90 degrees from verical as possible. Swashplate should be level looking from front.
7) Adjust front servo linkage so that the swash plate is (a) level from left or right side and (b) as close to 90 degrees from vertical as possible.
8) Replace all servo screws.

That's it. I fly it with PIT at 4 and PLT at 11 (clockwise from TDC with dipswitch #8 @ off or "unlock"). This seems most stable.

Hope this helps.

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RE: 22e Receiver Problem - 7/11/2006 8:13 AM   
asinla



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From: Venice, CA, USA
Status: offline 		Hi all. I had finally got my 22E hovering nicely and was getting some good hovering in. Then I made the dumb mistake of bumping the flight mode switch while I was checking the swash levels. After nearly taking my head off it fell on it's side and did the wounded heli dance only for 1/2sec before I grabbed the tx and flicked the switch off. Tonight when I plugged the battery in I got a blinking red led and no response from the servo's. Nothing. Dead. I opened the 4 in 1 and didn't see any burnt fet's. There was no burnt smell either. Everything looked good. I plugged it in again and got the same thing.Throttle was down all the way. I haven't tried my other batt yet. I will tomorrow. Anyone know what's up with this?

_____________________________

Will work for heli's

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RE: 22e Receiver Problem - 7/11/2006 4:18 PM   
krisma



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From: McDonough, GA, USA
Status: offline 		make sure your tx is also plugged. I had this problem before and for me it initially turned out to be the battery, or so I think. everytime I charged the new batt and used it then I wouldn't get the light. Recently, however, i've been experiencing the same thing with the newer battery. I jiggle wires on the 4-1 and get it to the second twitch of initialization, but as you did I opened the black box and could not find anything visually wrong.

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RE: 22e Receiver Problem - 5/24/2008 8:24 PM   
mysteryguymlt


 

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From: , MO, MALTA
Status: offline 		does anybody know how much current does the stock motor takes or the rating of the mosfet in the reciever? thanks to all

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RE: 22e Receiver Problem - 5/25/2008 5:46 PM   
jtspin


 

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From: Reno, NV, USA
Status: offline 		IIRC, the MOSFET is rated for an insane amount of current - like 80 Amps - but only under ideal conditions of cooling and loading (like bursts for X amount of time followed by light loading). The wiring and circuit board traces could never handle that much current and there's no heat sink on the MOSFET. The main motor draws something like 6A max. This is all from memory of quite a long time ago.

-JT

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All Forums >> RC Helicopters >> Electric RC Helis >> Walkera Helis - Dragonfly, etc.. >> 22e Receiver Problem
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