RC India

need help,i have never opened a tx ever this is my first time so decide to do some changes and learn something as im not good in electronics will need the best advice and help.
Got this second hand dx5e Tx,seems like it was hacked already antena was changed ,trim buttons missing but anyway i removed the module with help of a friend  thaught we would make a module for my futaba t6ex to fly dsm2 micro airplanes it was complicated  :banghead:( but still if anyone has any idea or has done it with futaba t6ex please advice) so its back in the tx now :thumbsup:. everything function well again now thank god.i thaught it would not.

now what ,ok i got an idea, will clean the tx good,make the antena look good ,also the plastic trim buttons were missing for the throttle and rudder trims (left stick pic1). :headscratch:

since i use elevator and alerions trim  (right stick) mostly i decided to simply remove only the plastic trim tabs from the throttle and rudder trims (left stick pic1)and put it on the elevator and alerions trim  (right stick).after doing this the elevator and alerions trim (right stick) with the plastic trims stoped functioning no beeps no nothing. :banghead:.. now what :banghead: called my tech officer sahilkit  ;) he said  to try   ,

opening the tx and connecting the throttle and rudder pcb trims (left stick)  to the connecters 6wire connector of the elevator and alerions trim  (right stick)did the same and it worked.so we then decided to remove the throttle and rudder pcb trims (left stick) along with the plastic trim buttons and use it as elevator and alerions trim (right stick pic2 trims swapped)it works fine now.
 However the throttle and rudder pcb trims dont work and i have removed them(pics in next post)

1st picture when recived the dx5e and second picture after a good clean and setting the antena which doesnt stick out at all now ;), and moving the trims and pcb's.
need the pcb trims in next post  for throttle and rudder trims..... please help ,advice, or assist from were to buy.

 realised that it could be the switches or wires faulty . any one has pcb trims(in pic) for this  dx5e ,or the plastic trim buttons which you dont need and are lying around do let me know. Pictures below are frount and back of the throttle and rudder pcb trim buttons which i need to get this tx working .

Nice work.
I love bringing old gear back to life.

Anyway, seems like the tx you bought was very badly taken care of.
In case you are not able to find those buttons, I suggest you make them on your own, the circuitry is simple as hell, and the buttons and all readily available.

Though another thought comes to mind, the pcb trims only have 2 diodes and 2 buttons, and buttons are the only mechanical parts, therefore if anything is wrong, it must be the buttons. You can just buy new ones and replace them and it should work.

Plus, what would it take to have the antenna come out of the hole at top, where it supposed to be?
Try doing that, would look better, shouldn't be hard.

Antenna is ok this way for me as it doesnt stick out from top and when bent it goes directly under the handle .... this will help for travel if all goes well. i too feel it is the button or may be the 6pin connector .i guess finding those plastic trim buttons will be the problem

On the rudder and elevator trim pcbs, check the action of switches using multimeter (in continuity mode), the problem will be mostly with the tactile switches, as foxrc said, thee are easily available in electronics shops .

They are tactile switch available at Lamington Road for very cheap price...you can find almost any replacement part for your radio at Lamington Road!  ;D :hatsoff:

Thanks foxrc,sooraj and himadri.... what about plastic trim buttons :headscratch:, as the tx will be opened i could put  the plastic trims and finish it of together in one go.

Sooraj you mean throtttle and rudder trim pcbs which i have to  check the action of switches using multimeter (in continuity mode) correct  :headscratch: the ones i have removed

Check all the non working switches .

p.s - was repairing the trim switches in a Avionic rcb 7x today :giggle:

I have plenty of those switches but need to find a good solution for covering the switches.

You might not be using all the 4 trims, try using only 2buttons for ele, aileron. This will solve your issue. As others said, the circuit is merely a switch. Try finding the points till the circuit board, then short these points using a screwdriver when the tx is on, you should hear the beeps. If yes, then its the switch fault, replace the switches. P.s. if you do not understand what i have said, please do not do it without some experts help.  Good luck.

frankly im sorry  i did not understand im illaterate in electronics but im learning how much i can,  would need to see a video or show someone who knows what he is doing and watch him do it, did not understand what you meant by"using only 2buttons for ele, aileron."why to touch elv and alerions when my throttle and rudd is not working.and elev and alr is fine. I will be using rud,elev,thr and alerions

Normally, you might find little use for rudder nd throttle trims, while trimming a plane you trim it for level flight using ele, ail and we hardly use rudder and throttle, so if the ele, ail trims are working fine, there is no need to open the tx for now.

Wanted to actually learn how its done as i doont hav much knowledge about it,so went  ahead gave it to a local electronic shop ,changed all 4 push buttons sat watching him do it and yeah it worked all trim buttons working fine even thou i have to give throttle and rudder pen pokes :giggle: here is a video of the servos dance watch full video.Made it just for fun
www.youtube.com/watch?v=y75jnkPSnXY (http://) (http://) (http://) (http://) (http://) (http://) (http://)

Looking for the plastic trim tabs for throttle and rudder ,anyone to donate ;D 8-) ;D 8-) or know were i could find them in india,


Questions?
- is that the distance these linear servos move when thay are being  trimed with the dx5e or should they go all the way to the end?????????
- the reverse servo buttons are kind of hard to reverse, may be not used for long, what will help to free it so it can be easily reversed?????

Someone having 3d printer may help  ;)

or ask the same repair person to source you suitable button caps.

https://www.google.co.in/search?q=tactile+button+caps&source=lnms&tbm=isch&sa=X&ei=86gHVdnqKsaLuAS0bQ&ved=0CAcQ_AUoAQ&biw=1280&bih=676 (https://www.google.co.in/search?q=tactile+button+caps&source=lnms&tbm=isch&sa=X&ei=86gHVdnqKsaLuAS0bQ&ved=0CAcQ_AUoAQ&biw=1280&bih=676)

after putting these button caps,do the trim buttons come a bit up ,so that i can use fingers to press the buttons instead of pen or something.im not sure if you get me.

yes they will come up

or can replace switches with lengthy version like this.

(https://www.adafruit.com/images/480x360/1490-00.jpg)

There is a specific switch for this, used in dvd player boards, which tells the uc that the tray has reached the either ends, you can use that to replace both the buttons of one channel trim, with this mod, you wont need a trim tab at all, search for your local market to see any dead dvd drives, and you will find them inside, i cannot post pics as i cannot find one now in my drawer, but i hope you understand.

Ashok.P

Wish i new this before i would have used it before replacing the push buttons,so may use button caps for now if worn out then go for these ideas thanks you ashok and akhilzid...... ashok sir a picture would really help in future especialy for me :giggle:... sorry im a slow learner