Sure Anwar Sir,

But due to low battry on mobile I have clicked only these pics but after that I start giving beep and was showing
Batt : 1.1 reason was Capacitor was not properlly connected to through the circuit,

after remove that burnt part, transmitter will able to on but with enoying beep, and show you Batt: 1.1

Total operation was, I have replaced Tantalum SMD with normal capacitor............(as discussed and suggested by Jitender Sir)

Tantalum SMD - 22mfd/16v
Normal Capacitor - 22uf/50v

This is pic with detail, what you have to do in case of this issue, and how to check.

Surely,

The difference is the ESR. there are electrolytic capacitors having 85 and 105 deg C. Choose 105 degree one. And in parallel, connect any 0.1uF of 0.22uF Capacitor for low effective ESR.

Possibly would work. And search for beep code.

I didnt understand sir, but now there is no beep issue.
and I have also checked is binding and is binding without any issue. i have checked its first 4ch and they are working fine...

Dear All,

I've read the entire mail but understand that you'll found the solution to the problem by repacing the right part but my question is Why did this Happen ? becuase all TX is Q TESTED & then sold to valauble customer like us ?

Is it because of bad dry soldering  ? or  due to high voltage to TX i,e  12.6V  continuosly operating for a long time or ?? pls try to find out the reason ,  this Thread can help another person  who buys a similar TX & Caution him to check his TX for any such problem .

I felt this thread is very important for Turngy tx User therefore asked this question & awaitng for replies.

pls also advise what to check in the TX for any such problem for eg Dry soldering etc.

regards Peter

i agree on peters point

There is no way to check  each individual component manufactured in millions and used in millions of gadgets  no level of QC practical to use. Even if each and every component going into a gadget can be checked and the the gadget using them in every single stage of manufacturing could be checked for any faults which is practically impossible, then even after passing the ultimate QC before release of the product for sale there is a chance of a component failing in operation. It happens to the unlucky person. If something COULD go wrong then it WOULD go wrong some time or other.  We just have to accept that.

Regards

point rao

Happy to here that
"It's Working."

Thanks

yes kalyan , you will find most of these types of threads ending  with nothing..this is something good

Hi All,

Its all depend on Luck, Few People burn that component by worng polarity and few like mine burn it without any wrong thing, most important thing is "We should know solution of problem" then we cant consider those problem as a problem, but when we dont know solution of problem then this is big issue.

This is want we can do.....

Play............Break............Repair...........and Play Again.........Cheers !!!

Hi all,
like gbisht even i got my radio burnt. I tried just by replacing the capacitor, but could not get it started.After few more inspection, i found wiring track near the switch was burnt.Got it repaired, but still no response. So finally hunted for the ICs.
got 78L05 and replaced.
Now my radio starts, binds, but servo doesnt show any actions for stick movements..

And on display its showing " BAT:9.0 ", while the actual voltage of battery is 10.2.

I have attached the after surgery pictures.

Abhay : Nice to see that my past work is usefull for someone.

You dont seems new but still how u are binding your Rx ?

Put Bind Plug in BATT (first n last pin)
put ESC in any channel (3-ch is good)
and then bind

I hope this will solve the issue

Yes Gbisht,
I am doing the same:
let me describe my procedure:

1:plugging bind plug in last pin of Rx
2:plugging ESC wire in channel 3
3:plugging ESC to battery.

the red light starts blinking on Rx

4:swithing on tx while "bind range test" button on module already pressed.
tx gets swithed on, after a second or two, the red light on rx stops blinking and glows continously..

then i switch off my tx, then rx.
remove bind plug from rx and then try to use it like my other Mhz Radio systems....

but why i am worried is:
1:i am getting 9.0 v in display panel..
2:and does this tx also make a beep sound while swithing on? my doesnt make 

Quote from: abhay1290 on May 17, 2012, 12:41:11 AM

1:plugging bind plug in last pin of Rx

Abhay,

Put bind plug in slot where written BAT, instead of BIND, I suppose that is Second Ch from TOP.

Look,
As 9 volt displays that means the microcontroller is OK but a separate subroutine is executing and so reading the pot position and generating pulss is not possible. But RF section is OK that is why it binds smoothly. But Serial Data that goes to Tx is missing.

So, there is two option.
1. Either the voltage sensing circuit has changed/modified (with time/humid weather, change of capacitance/resistance value change).
or
2. The voltage itself is low.

So, think for the problem corresponding  to easiest solution  first.
The voltage itself low may be occured for loose connection or burnt wire/loose connector.
Check that first.
Again, use 8 dry-cell in series if it disappears. If yes, it may be other problem. If not, check all connections.

But if the circuit modified (for diode replacement or insertion) voltage drops and this type error displays.

have you introduced any diode in battery line for extra safety? Just short it and check.

Waiting for solution.

yes gbisht'
i tried on ch 9 also.. no response..

i still wonder why does the light stops blinging (and glows continuously) and rx gets bind, still servos not responding..

i even factory reset the tx..


@ kalyan sir, yes i've inserted a 1n4001 diode, to check any further reverse polarity..
ive attached the image also

regarding battery: i use a 8-cell nimh rechargeble battery pack (1000 mah) for my Tx

i am still worried about the "no beep" issue on switch on.

I think I missed something is tx only showing BAT 9.0 Only on display no turnigy logo or any other information.
if yes then read my above thread again

As told earlier,
JUST SHORT THE DIODE AND CHECK AGAIN Please...

Hope failsafe mode would vanish.
If you want to keep diode, use LiPO insted LiFe battery or use low drop diode.
Possibly there is another in built diode inside which drops further. You may short that also insted of 4001.

Yes kalyan sir,
will short the diode in some time and check it..

@ gbisht , the screen is all normal with display. just now i have low battery on camera. will upload screen photo in a couple of hour..

Abhay

@ Kalyan sir,
I have eliminated diode. The voltage now it shows it 9.7 V, on actual voltage on battery being 10V. I think voltage problem is solved.

But Rx still not functions.But binds smoothly.
I am afraid about the buzzer too. Is there anything wrong with 6206A regulator also??

Why afraid ?
Just measure the in out voltage of the IC. If OK, then forgot about that.

Now, check the Joystick POT terminal Voltages with respect to ground. (Or Negative).
If all the terminal voltags are same, you have to check the POT common terminals (of various POTs) and the uncommon terminals. And the connected voltage supply block / component.

And check if the servos connected to Rx have stable position or uncontrollable. (If no signal is present, you can rotate servo arm and it will not return back. But if you cannot or returns back, It gets signal, but fixed one. In first case, Crystal may be damaged (But as display works, it depend on circuit diagram) and in second case, POT Data are constant (Or POT Supply voltage is missing).

Waiting for early recovery.

Datasheet :
http://www.infinwin.com/files/LN6206.pdf
Thanks

i hope this thread will be made sticky thread.. and people repairing their cheap 60 $ radio themselves.. reversing the polarity and burning the radio is the most unacceptable mistake though ,( i burnt 2 radios like that)..huh.. but still cheap fixes like this will help members a lot.

Kalyan da, i checked the voltage of the other IC i.e. 6206A,
Input Voltage is 5V (from 7805)
Output is 3.29V.
i campared it from chart, its correct. The IC seems functonal no doubt..  

I didnt checked the sticks and knobs by multimeter, as they are in action as per the Display mode(i.e. Menu-Settings-display)..
as i move any stick, screen shows the movement on display..

and the servos connected to Rx are free, i.e, i can rotate their arms without any hindrance and they remain wherever i leave them.

sorry i forgot to add that buzzer has the speaker damaged. i tested with alarm clock speaker, it is getting input. but thats secondary concern.


now what can be the next step? If crystal is the probable reason, how can they be checked?

Just check the trainer switch and the entire lint that goes from uC data to RF card.
Possibly PPM/PCM data not enter to RF block.
And check any servo terminal voltage (center and the dark one) at receiver end for receiver failure. (Mostly should be with no problem but for extra precaution as servos are free).

And if you have components, you can check the data Line pulse by series capacitor, antiparallel Diode+LED(red) and resistance 10 Ohm-220 Ohm). And a transistor may require for low voltage checking if bus voltage peak lower than 2 volt.

You can check with schematics. Turnigy 9x is same too.

Thanks