Eachine P51D Flight Controller Receiver Repair

[@johnellefa]

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]

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

[@tommyb5973]

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

[@1nformatica]

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

[@robertbheatcoker8638]

Do you know where I can buy this board?

[@1nformatica]

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

[@burachattanpradit4450]

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]

You will need to split the fuselage in half, you can see what it looks like in this video : kzbin.info/www/bejne/qKGmeWaBq9alopI Thanks for watching, have a great day!

[@burachattanpradit4450]

@@1nformatica Thanks a lot, Sir.

[@1nformatica]

@@burachattanpradit4450 You're welcome!

[@MrDLRu]

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]

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]

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!

[@joelfildes5544]

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]

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]

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

[@ClayPigeonKilla]

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]

Thanks! It was plugged in but some how faulty : kzbin.info/www/bejne/gX_Mi4Cabrt3pbs KZbin no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!

[@ClayPigeonKilla]

@@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]

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

[@Jay-gf7mg]

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]

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]

@@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]

@@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!

[@burachattanpradit4450]

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]

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]

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

[@1nformatica]

@@burachattanpradit4450 Yes. I have one bound to my Taranis transmitter using a multiprotocol module : kzbin.info/www/bejne/m2W1lpiHj9-hipY

[@burachattanpradit4450]

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

[@1nformatica]

@@burachattanpradit4450 You will not be disappointed!

[@biffoswilly]

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

[@1nformatica]

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]

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

[@MsDanish1212]

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

[@1nformatica]

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!

[@MrDLRu]

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]

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.

[@jordancoleman2402]

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]

Good to know, thanks for sharing.

[@DrWenChannel]

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]

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

[@Indy64738]

Nice job!😎😎😎

[@1nformatica]

You're welcome! Have a great day!!

[@MCsCreations]

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]

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!

[@theoztreecrasher2647]

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]

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!

[@seba2038]

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

[@1nformatica]

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

[@kwhp1507]

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]

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!

[@Indy64738]

Great job!! 😎😎😎

[@1nformatica]

Hey thanks! Have a great day!

[@JeffNowitski]

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

[@1nformatica]

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

[@carlosjuarez7449]

You're right! My servo was preventing connection

[@gregcann6139]

You're welcome! Have a great day!!

[@1nformatica]

More info in my foloow up video : kzbin.info/www/bejne/gX_Mi4Cabrt3pbs Thanks for watching, have a great day!

[@jaimemacias826]

Conect the servo, then it work propely.

[@1nformatica]

kzbin.info/www/bejne/gX_Mi4Cabrt3pbs

[@joelfildes5544]

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]

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

[@joelfildes5544]

@@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 ?

[@proprotornut5389]

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]

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]

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

[@lalbeikh_channel]

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]

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]

@@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]

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

[@lalbeikh_channel]

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

[@miguelgateira4070]

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]

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]

@@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]

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

[@lasersbee]

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

[@1nformatica]

That is explained in part 2 kzbin.info/www/bejne/gX_Mi4Cabrt3pbs Thanks for watching, have a great day!

[@lasersbee]

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

[@1nformatica]

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

[@lasersbee]

@@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.

[@rudd2962]

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]

You are right but in this case it was a faulty servo : kzbin.info/www/bejne/gX_Mi4Cabrt3pbs BTW I usually fly it with my Taranis! Please consider subscribing if you have not done so already!

[@rudd2962]

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]

@@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!

[@gbraadnl]

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

[@1nformatica]

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]

@@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]

@@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]

@@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]

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

[@Bbbbillythekid]

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]

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]

@@1nformatica you too!

[@terrymurphy562]

Just wondering if you ever fixed the issue. Can you not use with another radio and change the channel order??think it’s AETR