Eachine P51D Flight Controller Receiver Repair

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Connecting the battery in reverse has let the magic smoke escape from this Eachine P51D flight controller. I show how to take the plane apart and see if we can fix the problem.
****STOP PRESS!!**** Update video here : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html
🛒 Eachine Mini Mustang P-51D 761-4 Mini F4U Mini T-28 Trojan RC Airplane Spare Part tinyurl.com/EachineFCP51
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26 дек 2020

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Комментарии : 108

@johnellefa 6 месяцев назад

similar things happened to mine, the only exception was, when i replugged the aileron servo, my board went poof. bought another board and the same thing. Surely the issue is that servo right. Ofcourse i didnt have any aileron control to begin with. but it's nice to know that with the new board the same thing happened.

@1nformatica 6 месяцев назад

Good to know, thanks for sharing. Thanks for watching, have a great day!

@tommyb5973 3 года назад

Hi - not only am I impressed with your technical ability I note you are attracting an all together different type of audience 🤩

@1nformatica 3 года назад

Yeah, I have to beat 'em off with a stick!!

@robertbheatcoker8638 6 месяцев назад

Do you know where I can buy this board?

@1nformatica 6 месяцев назад

There is a link in the video description. Thanks for watching, have a great day!

@stevecompton9644 3 года назад

Any idea if you could convert this warbird to brushless and use the stock receiver? If so, any thoughts on wiring locations for the motor leads?

@1nformatica 3 года назад

There are some great mods to this plane on this channel : ru-vid.comvideos Most need to change the receiver board. Please consider subscribing if you have not done so already!

@mrsillystrings4075 Год назад

Check out Groung control RC on RU-vid and you will find all you need to know about that conversion 👍🏻 I'm doing it myself

@burachattanpradit4450 2 года назад

Do you have any technique and proper area to cut through the foam body of the plane to replace the motor in case of the old motor in the plane has damage ? Thank you .

@1nformatica 2 года назад

You will need to split the fuselage in half, you can see what it looks like in this video : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rpCH3Kvqrl0.html Thanks for watching, have a great day!

@burachattanpradit4450 2 года назад

@@1nformatica Thanks a lot, Sir.

@1nformatica 2 года назад

@@burachattanpradit4450 You're welcome!

@MrDLRu Год назад

The better way, IMHO, is to cut at the body lines on the bottom section of the plane. Cut at an angle to help lock the panel back in when it gets glued. Make sure you push the motor out from the front before cutting the panel out. You will need to use a rod to sharply tap the motor loose. Once loose from the gearbox, cut the panel out. Second option is to cut around the fuselage in between the No2 and No3 exhaust pipe feature. They glued the gearbox in pretty good on these and tough to separate from the foam.

@Bbbbillythekid 2 года назад

Hi ! I,'ve similar experience with my volantex bf109, firstly, the aileron servo turned to one end once the battery connected.then i removed this servo, just to wait for the new spare part arrive. At the same time, i tried to fly the aircraft without aileron control. Oooh! Strange thing appered ~the rudder control stick had no reponse!and the aileron control stick changed to rudder control by itself! as well as the direction was reversed!! funny ha! Finally everything become nornal when the new aileron servo installed.

@1nformatica 2 года назад

The remaining mystery is how the controller detects the aileron servo! Glad you fixed it. Eachine I usually buy from Banggood as they have better pricing. Otherwise Aliexpress. Thanks for watching, have a great day!

@MCsCreations 3 года назад

Really great work, my friend! 😃 But it's definitely weird the way it's working now... 😬 Looks like it lost some kind of configuration... I don't know... Anyway, have a fantastic 2021! And stay safe there with your family! 🖖😊

@1nformatica 3 года назад

Thanks Mario. Yes, it is just so close to working properly. See the comment from #theoztreecrasher looks like it has set itself to 3 channel mode. Will try and find some way to change it. Keep safe!

@jordancoleman2402 Год назад

I've replaced many of those 3 leg dioads, I find that just a hair bigger ones from toy quad copters work a lot better than original and don't burn up easily

@1nformatica Год назад

Good to know, thanks for sharing.

@ClayPigeonKilla 3 года назад

Looks like you didn't have the third servo (aileron servo ) plugged in. When that servo is no connected the board goes into three channel mode. It's the same board used in the mini f22/F16. They just don't use the third servo and it's only three channels (bank and yank). I know it's late but hope this helps.

@1nformatica 3 года назад

Thanks! It was plugged in but some how faulty : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html RU-vid no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!

@ClayPigeonKilla 3 года назад

@@1nformatica just subscribed. I have the mini F16. I am currently working on a mini christen eagle And I'm going to use this board. Seems like it will work well for my application but I guess we'll see.

@1nformatica 3 года назад

@@ClayPigeonKilla Hey thanks! You have some very interesting projects there, look forward to seeing some videos.

@theoztreecrasher2647 3 года назад

Looks like time to hit the Boxing Day sales again M'lud! 😜 Actually you are not quite correct in saying that that board is only used in the 4Ch Sport Cub and Eachine War Birds rebrands. It is also used in the 3Ch Mini Trainstar, pusher V761-2 Mini Ranger, V761-3 Super Cub and maybe others and has the unusual programming that, when a working servo is plugged into the Aileron socket, it operates as a normal 4 channel system. But with no Aileron servo, it reverts to 3 channel with the Rudder control on the right stick. The F22 also uses the same board but the programming seems to have been altered a bit as reported by AirDOGGe. (RC Groups - Doggeslife here.) Neat work on the repair attempt though! No chance of old bleary eyed shaky fingers here attempting anything similar these days. 😁

@1nformatica 3 года назад

Ahhh, thanks for the info. I guess then it has somehow decided it is in 3 channel mode. Wonder if AirDOGGe or anyone has tried to hack the programming port? Merry Xmas!

@kwhp1507 3 года назад

I am thinking the momentary reverse polarity must have screwed up the programming done at the factory. But as a RC pilot, for future reference it would probably work just fine as a 3 channel aircraft if you changed a few wires around. All you would have is elevator, aileron, and throttle. This is what we call “bank and yank”. I know it has a gyro, but the gyro would have to be turned off or it won’t fly at all. BTW I found your channel while searching for electronic screwdriver tear downs and now I am subbed. Thx!

@1nformatica 3 года назад

Thanks Kevin! Glad you find my stuff interesting. Yes I plan to see if it will work just as 3 ch in another plane. Hope you fixed your Wowstick! Happy New Year!

@joelfildes5544 2 года назад

Hi there,I have the same plane,and it’s been great for years…but the motor started ‘acting up’ at first it would only work with a ‘finger start’ then it would only run for half a second,restart,another half a second…do you reckon it’s the motor,or the ESC ? (It did take a hard knock recently,nose on,but I don’t think it’s a mechanical issue,as I can’t hear the motor,and the prop still turns,albeit for only half a second at a time…cheers)

@1nformatica 2 года назад

My bet would be the motor, especially after a "close encounter"! It is a gear motor so maybe a tooth is missing. As you will need to take the plane apart anyway you can try running the motor direct from a DC supply to test. Thanks for watching, have a great day!

@joelfildes5544 2 года назад

@@1nformatica cheers,that great…I’ll let ‘you’ know.

@Indy64738 2 года назад

Nice job!😎😎😎

@1nformatica 2 года назад

You're welcome! Have a great day!!

@DrWenChannel 3 года назад

Hi, my Eachine mini P51's elevator suddenly stopped working. Do you think this is related to the Flight Controller? Why the Flight Controller would fail? Thanks! Also, if I need to replace it, where can I buy just the flight controller? Thanks!

@1nformatica 3 года назад

It is more likely to be the servo. Swap the connector on the board to the rudder and see if it works. If the servo still does not move it is faulty. You can get the FC here if you need it : tinyurl.com/EachineFCP51

@MsDanish1212 3 года назад

Hey , came across this helpful video :) , may i ask from what kind of board you found that 3.3v linear regulator ?

@1nformatica 3 года назад

Hi, thanks for watching. The regulator came off another flight controller board that was faulty. They are very common as most MCU's and memory chips have 3.3 volt supplies. Please consider subscribing if you have not done so already!

@Jay-gf7mg 3 года назад

errrrrmmmm i'm not as tech savvy as you .. if i can get the brick out , would you repair it for me or look into what is wrong with it ??.... new model has turned up but its faulty and its defo the board me thinks ... rudder and elevator not working .. throttle and elevator are fine .... thanks

@1nformatica 3 года назад

A little more information please! Which model is it? Are you using the supplied transmitter? Rudder and elevator not working but throttle and AILERON working? I doubt that shipping it to Spain would be economic!

@Jay-gf7mg 3 года назад

@@1nformatica hi ... oh wow Spain would be throw!!🤣 no worries I think I will try to order a new board with servos if there is such a thing... oh it’s the same model in your video p51 mustang eachine ... tried the stock transmitter and bound it to my radiomaster ... still the same issue ... thanks for replying though , best

@1nformatica 3 года назад

@@Jay-gf7mg This is the board you need : bit.ly/EachineFC Be careful as there are several versions of the board for different models. Please consider subscribing if you have not done so already!

@seba2038 3 года назад

Great video. It would be useful if you make a video how to replace the motor too. Nobody does have it.

@1nformatica 3 года назад

Hey thanks. The model is back with its owner now so I will have to wait until he breaks it again! RU-vid no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!

@MrDLRu Год назад

I put a Volantex P40 Warhawk receiver into a TopRc P51 D ( couldn't bind to the TopRC receiver with TX16S Radiomaster) and had to invert the servos for Rudder and Elevator to get it to work, but then lost the safe mode. Was wondering if I could have just desoldered the motor leads and soldered them, in reverse polarity, to each others servo controller. Meaning, the Rudder motor wires at board to the Elevator motor wires at board, while reversing the polarity also.

@MrDLRu Год назад

To add, the servos are sitting upright in the TopRc P51 D 450mm as compared to being upside down in the Volantex Warbirds. I'm thinkin' how cool would it be to have an inverted flight safe mode function...lol.

@proprotornut5389 3 года назад

Fascinating video. Have you tried using and holding the sticks before arming the throttle. I think they use that for servo reversing, but maybe they can also change the channel mapping. Worth a try at least. Merry Xmas btw. 👍

@1nformatica 3 года назад

Hi, thanks for the idea. Moving the sticks down and out before arming the motor calibrates the gyro to the current attitude of the plane. I have done it and it calibrates as it should but the 3ch mode remains, no alerion control. Will keep trying, there must be a way! ¡Feliz Navidad!

@proprotornut5389 3 года назад

@@1nformatica Good luck. Like you say, there must be a way. 👍

@biffoswilly 3 года назад

When you get the new board how will you bind it ti the controller??

@1nformatica 3 года назад

The same procedure as described in the manual. 1. Tx off, throttle minimum and gyro in middle or beginner position. 2. Connect battery to plane and turn on Tx within 5 seconds. 3. Rx LED will flash for 3 - 8 seconds and bind automatically. 4. When Rx LED stops flashing binding is complete. Please consider subscribing if you have not done so already!

@biffoswilly 3 года назад

@@1nformatica Thanks I found the manual and this is correct, I am sorry for wasting your time and Thankyou again

@burachattanpradit4450 2 года назад

Hello, Sir. I am interested in this Eachine fighter planes series. Do you have some clip video to teach me how to bind the new receiver to the old radio controller in the case of if I have bought this plane but the receiver in the plane is damage and i have to buy the new receiver for spare parts . Thank you so much.

@1nformatica 2 года назад

You can see the binding procedure here: manuals.plus/eachine/eachine-mini-mustang-p-51d-manual#binding_instruction Thanks for watching, have a great day!

@burachattanpradit4450 2 года назад

@@1nformatica So, one transmitter in radio controller can bind the new receiver if the previous receiver in the plane has damage ?

@1nformatica 2 года назад

@@burachattanpradit4450 Yes. I have one bound to my Taranis transmitter using a multiprotocol module : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-e4ReeQZznT4.html

@burachattanpradit4450 2 года назад

@@1nformatica Really Nice!!! With your valuable answers that can help me decide to buy this great planes soon !

@1nformatica 2 года назад

@@burachattanpradit4450 You will not be disappointed!

@Indy64738 2 года назад

Great job!! 😎😎😎

@1nformatica 2 года назад

Hey thanks! Have a great day!

@joelfildes5544 11 месяцев назад

Interestingly,my p51 started reverting to right stick,Rudder and elevator recently.If I don’t check it before flight,it can and WILL all go wrong.Time for a new one methinks

@1nformatica 11 месяцев назад

Maybe just a loose connection or broken wire on the aileron servo. Thanks for watching, have a great day!

@joelfildes5544 11 месяцев назад

@@1nformatica both my brand new Spitfire and the now crashed a million times mustang,we’re eaten by a mouse last week (I keep em at my caravan,and one got in) it tunnelled through each box (right in the middle ?!) and ate 80% of the spit,and had a few nibbles on the mustang…gutted.But,I’m gonna convert a small balsa rubber powered and stuff the spit innards in that…time for a bit of graft.I got the p51 back in the air with sections of the spit wing spliced in,and removed and taped over the half canopy that was left…it flew fine,but then occasionally did this mode change on binding.I’m gutted (not as much as the spit) but the question is,do I go for the BF109 or the NEW blue Mustang ? The spitfire had ‘wing wobble’ it was improved with nose weight,but it never flew as good as the Mustang…wadya reckon ?

@rudd2962 3 года назад

Unplugging the external servo from the brick will make it function like a 3 Channel , Left Stick = Throttle, Right Stick = RUD n ELE Try unplugging the external servo n play around with it, than turn OFF n plug in the external servo n try again to see if this resets it back to the default 4 Channel setting .. If the above fail, you can borrow a Jumper Tx n configure the tx to assign the Control Sticks correctly , this should probably work.. Then if it works, go buy a Jumper tx to fly the plane ..

@1nformatica 3 года назад

You are right but in this case it was a faulty servo : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html BTW I usually fly it with my Taranis! Please consider subscribing if you have not done so already!

@rudd2962 3 года назад

glad you worked it out . Taranis, than you are familiar with OpenTx eh, I am using Deviation, do you think I should upgrade to OpenTx

@1nformatica 3 года назад

@@rudd2962 Yes, OpenTx all the way! I don't know much about the Deviation code but it seems to me not to be being developed much these days. Your mileage may vary!

@JeffNowitski 2 года назад

atm my p51 has the same problem my aileron becomes the rudder control 😥

@1nformatica 2 года назад

Most likely the servo or connections. Try another servo. Thanks for watching, have a great day!

@carlosjuarez7449 Год назад

You're right! My servo was preventing connection

@gregcann6139 Год назад

You're welcome! Have a great day!!

@1nformatica Год назад

More info in my foloow up video : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html Thanks for watching, have a great day!

@miguelgateira4070 3 года назад

My plane hit a wall and stopped accelerating and the throttle trim just beeps backwards. There's nothing broken, just bumped into it. Everything else works. Does anyone know how to solve?

@1nformatica 3 года назад

You will need to take the plane apart and check the connections to the flight controller. Maybe a wire has come off. If not I would take the wires off the motor connections and test the motor (propeller off!) with the battery directly to check it spins. The tiny brushes inside the motor may be damaged. Please consider subscribing if you have not done so already!

@miguelgateira4070 3 года назад

@@1nformatica Hello again. I already installed the new engine and it works, however the elerons servo doesn't work and it gets very hot and it's melting...any suggestions for a compatible servo?

@1nformatica 3 года назад

@@miguelgateira4070 I replaced an aileron servo with one of these : bit.ly/4xServo1mmJST good luck!

@lalbeikh_channel 3 года назад

Hey, this is the 1st video i came across on your channel, was searching for such board repairing. I was wondering if you have any idea on how to change the servo if it is broken? It seem like the servo has its potentiometer soldered onto the board, so if i were to change it, i have to do the same right, motor to motor and potentiometer connection to the board as well?

@1nformatica 3 года назад

Yes, that wold be correct. It may be difficult to find a suitable servo to use. What is wrong with the servo? The replacement boards are not that expensive. See link in the video description.

@lalbeikh_channel 3 года назад

@@1nformatica the servo gear broke. It is the wltoy f959 board without the gyro. Its still useable, just did not want to throw them. So gonna try to replace it with external 3.7g servo bypassing the internal servo control circuit

@1nformatica 3 года назад

@@lalbeikh_channel Good job! Tell me how it works out for you.

@lalbeikh_channel 3 года назад

@@1nformatica sure buddy, will update you once i've im done with the replacement.

@jaimemacias826 Год назад

Conect the servo, then it work propely.

@1nformatica Год назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html

@lasersbee 2 года назад

If the PCB does not see (or reecognize) an aileron connected... only the rudder and elevator will work.

@1nformatica 2 года назад

That is explained in part 2 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KNiZMd9VDoY.html Thanks for watching, have a great day!

@lasersbee 2 года назад

@@1nformatica Hadn't seen the 2nd part... Just watched it... Glad you found the problem... ;-)

@1nformatica 2 года назад

@@lasersbee The mystery remains as to how the board senses the servo, especially as the servo I changed works perfectly well! Any thoughts?

@lasersbee 2 года назад

@@1nformatica Since you only changed out the Ail Servo it seems the other servo was fried. That being said it could be that the load on the Servo motor was not sensed like they do with the Propeller Motor. There are no pulses going to drive the FET that controls the prop motor without the motor connected. This can be enabled (without the prop motor) by installing a 3K resistor instead. For the Ail Servo it's hard to know for sure without that 'defective' servo in hand.

@gbraadnl 2 года назад

These 66xx or 65xx (662K) are not very tolerant to reverse voltage and spikes. Already replaced many on different boards and receivers.

@1nformatica 2 года назад

You're right! The magic smoke escapes very easily! It is difficult but obviously not impossible to plug the battery in backwards. In my other guise repairing computers I have even seen someone manage to force a USB plug into an ethernet port!

@gbraadnl 2 года назад

@@1nformatica manufacturers have become lazy to add reverse polarity protection. Flysky and WLToys do the same. Always nice to have some in stock.. But should not be needed. Also, try using a smaller tip. I did see you were able to solder it, but a smaller tip avoid accidently blobbing other pads or damaging surrounding plastic.

@1nformatica 2 года назад

@@gbraadnl I think it's not so much laziness but penny pinching. My first job was with Marconi Space & Defence and mil spec dictated everything built up to a high standard. Now sadly everything is built down to a price. Thanks for the "tip" on soldering!

@gbraadnl 2 года назад

@@1nformatica you can pinch on money and still add it. But yeah... Even the engineers work costs money. Lol, I used to work on contract for the RNLA so MilStd and military spec are known to me. In those places money doesn't matter: it was counted in human lives :-D.

@gbraadnl 2 года назад

For those who didn't understand : lives saved of course ;-)

@Bbbbillythekid 2 года назад

By the way! Wanna know which way you guy boughtt such rc aircraft?by armazon? ailbaba? I'm just boughtt it through the ( tao bo) . PS : i'm living in hongkong.

@1nformatica 2 года назад

Eachine I buy from Banggood as they usually have better pricing and ship from Europe. Otherwise Aliexpress. Thanks for watching, have a great day!

@Bbbbillythekid 2 года назад

@@1nformatica you too!