RunRyder RC
WATCH
 1 page 815 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Fried my 3GX....How/why?
01-21-2015 05:18 PM  3 years agoPost 1
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

Don't feel too upset about it but I wonder why it fried.
I braided my servo leads to make it a little more neat.
I couldn't tell which ends were which though so I thought trial and error.
I plugged one in to power it and then thought I would swap them around until the right servos moved to the right channels.
The second I plugged in the second lead,it burned the lead in two and now the 3GX won't move any of the servos.

It was powered up when I plugged it in but why would that matter?
It also burned some leads in two a few days ago but I have flown it since that incident.

The leads have a constant almost exact six volts on them by the way.
The lights work and it cycles through the cold start but no servo movement anywhere.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-21-2015 06:00 PM  3 years agoPost 2
Stephen Born

rrElite Veteran

USA

My Posts: All  Forum  Topic

...

PM  EMAIL  Attn:RR  Quote
01-21-2015 06:04 PM  3 years agoPost 3
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

I only have one 2S lipo.
I use a voltage regulator. Set to six volts.
I didn't have time to smell burning. Didn't even get the lead plugged in all the way.
Just touched the plug to the pins and the lead lit up like a welding lead in the middle.
It was not backwards or anything.
It burned up when the plug contacted the pin row.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-21-2015 06:09 PM  3 years agoPost 4
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

I think it may have just been the jumper lead.
It is the second one to burn.
The jumpers are from a DJI Naza and may not be up for the servo draw since everything on a multirotor is signal with no moving parts.

When it melted,it must have shorted out the FBL.
Then again,the servos plug into the reg so the jumpers just power the lights and gyros.

I just don't know.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-21-2015 06:11 PM  3 years agoPost 5
Stephen Born

rrElite Veteran

USA

My Posts: All  Forum  Topic

...

PM  EMAIL  Attn:RR  Quote
01-21-2015 06:29 PM  3 years agoPost 6
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

I think you're right.
The jumpers are fine. There's no real power draw on them and I have used them for this exact purpose on a bunch of helis. Even this one has flown with them.

To help me sleep,I just hooked the regulator and servos up to a standard receiver and everything works. So it's just a fried 3GX....Not out much.lol...
I ordered a Kbar a few days ago because I was just curious to see if they actually work.
I'll just fly with it until my BeastX arrives.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-21-2015 06:33 PM  3 years agoPost 7
Stephen Born

rrElite Veteran

USA

My Posts: All  Forum  Topic

...

PM  EMAIL  Attn:RR  Quote
01-21-2015 06:47 PM  3 years agoPost 8
PilotPin

rrApprentice

Indiana -- USA

My Posts: All  Forum  Topic

It would take a serious short to burn a lead into. Probably also burnt the traces in the FBL.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-21-2015 09:19 PM  3 years agoPost 9
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

Not really burned in two. Sorry.
It just burned off the insulation and the hot and ground got together.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-21-2015 11:47 PM  3 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

My guess is you fried one of the power-line busses inside the 3GX. I had a friend who last summer hooked his up wrong and drew enough current to vaporize two of the three small, square connector pins on the lower right hand corner of the block.

I opened it up, replaced the missing connector stuff, and repaired one of the burnt power traces inside...took about 30 minutes, good as new.

I'd be willing to take a look at yours and see if it can't be brought back to life, if you want.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
01-21-2015 11:56 PM  3 years agoPost 11
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

Send me your mailing info.
You can have it if you want.

Appreciate the help and the offer.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:28 AM  3 years agoPost 12
jschenck

rrProfessor

La Vista, NE.

My Posts: All  Forum  Topic

The 3GX has ports that are for signal leads ony - where you use the 3-to-1 leads that come with the 3GX to plug the 3GX into a regular receiver.

Is it possible you plugged the power into one of these stacked signal ports? Or maybe plugging a servo into one of these stacked signal ports did it (?)

PM  EMAIL  GALLERY  Attn:RR  Quote
01-22-2015 01:30 AM  3 years agoPost 13
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

No. It's been flying.
I unplugged the right and left aileron to switch them around and it fried as soon as the plug touched the pins.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:33 AM  3 years agoPost 14
jschenck

rrProfessor

La Vista, NE.

My Posts: All  Forum  Topic

ah, another possibility, the servo plug may have been one pin off so positive of the servo landed on the ground of the 3GX and signal went to the postive, making a short - it's pretty easy to get the connector 1 pin off on the 3GX

PM  EMAIL  GALLERY  Attn:RR  Quote
01-22-2015 01:35 AM  3 years agoPost 15
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

Well....I shouldn't say impossible....but highly unlikely.lol....

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:38 AM  3 years agoPost 16
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

The one pin off would be possible but the center pin that the positive lead goes on is burned.
If it had been one pin off,the signal wire would have been on that pin.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:44 AM  3 years agoPost 17
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

I like your line of thought.
I'm sure it's something I did but I'm relatively certain I plugged it in right.
Never 100% though.

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:45 AM  3 years agoPost 18
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

The more I think about it....the more I like the one pin off idea.
The positive pin is burned but it may have burned from power going into the signal wire.

Bottom line is it's broke.lol...

I literally never use the word literally right.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-22-2015 01:53 AM  3 years agoPost 19
jschenck

rrProfessor

La Vista, NE.

My Posts: All  Forum  Topic

I do know when I've melted wires (which I've done more than I'd like to admit) it's something I did.

I have a pair of wire cutters I turned into a pair of nice wire strippers when I cut a white and black wire at the same time, thought I had flipped the breaker. Learned two things in one lesson: 1. verify power is off with a meter or tester of some sort. 2. cut one wire at a time.

point is - stuff happens

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 815 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Fried my 3GX....How/why?
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Sunday, October 21 - 2:17 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online