Turnigy 9x with Flysky TH9x main board

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egpurusotaman
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Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sat Nov 18, 2017 1:57 pm

I use turnigy 9x radio for many years. In the initial days I fried my transmitter after connecting the battery with wrong polarity. After replacing all the fried component the transmitter started to work perfectly and using till date. I even upgraded to ER9x firmware to the main board.
Recently one of the hobby enthusiast broke this flysky th9x transmitter and he donated his main board for me. As both turnigy 9x and flysky th9x are just rebranded transmitter. When I received the th9x board all the Tactile push button was broken, which happened during the shipping of the board. I replaced all the Tactile button in Th9x board and connected in my 9x transmitter. On powering the tx, I dont get display, no beep sound and no signal from the transmitter it just look like a dead transmitter.

I cross check the voltage in the main board, The primary regulator 78L05 gets 11.1v as input and 5v as output and 6206A regulator gets 5v as input and 3.3v output and the on/off switch regulator also get the proper voltage of 11.1v input and 5v as output, But still the board is not coming up.

I tried replacing back my 9x board and all works perfecly.

Later, I tried to upgrade the fimware in Th9x board by soldering programmers ribbon cable wires (cable length is lessthan 15cm) and connecting to PC, The board is not getting detected by the Pc, getting below error

AVRDUDE Iniciado\n
C:/Program Files (x86)/eePe/avrdude.exe -c usbasp -p m64 -P usb -U eeprom:r:C:/Users/Naylor/AppData/Local/Temp/eebackup.hex:i
================================================== ===============================

avrdude.exe: error: programm enable: target doesn't answer. 1
avrdude.exe: initialization failed, rc=-1
Double check connections and try again, or use -F to override

I have double check the soldering of the ribbon cable and there is no bridge in soldering and also checked the board for any breakage in the circuit and not able to find any breakage.

Please help me to resolve the issue.

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jhsa
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sat Nov 18, 2017 3:38 pm

There are.2 inductors on the board. Check they are not open. If you don't know where they are I will post a picture when I get home later..

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sat Nov 18, 2017 6:50 pm

I will wait for you Pic...

ReSt
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Re: Turnigy 9x with Flysky TH9x main board

Post by ReSt » Sun Nov 19, 2017 12:00 am

And NEVER use the -F option of AVRDude.
That would probably brick your main board.

Reinhard

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sun Nov 19, 2017 1:26 am

Here is the picture.. The inductors are marked with a circle. when you measure their resistance, they should read like a short.. Near zero ohms

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sun Nov 19, 2017 3:10 am

eb104e1a-b08c-4f03-83f0-246d9ab94a23.jpg
attachment
@ Jhsa, I checked without connecting the battery and measured at 0.5 ohms and 0.3 ohms

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jhsa
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sun Nov 19, 2017 8:52 am

Then they ae ok. We need to know all voltages are at the processor. Will try to post another picture in a while.
You said this board was damaged and donated to you? Do you know what happened to it?

There is also a chance that it might be bricked as Rest pointed above.

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sun Nov 19, 2017 5:46 pm

I got this board from another hobby enthusiast, he said the Tx came under his car and the transmitter case and antenna got damaged. The transmitter was working before it got broken. below is the broken transmitter and the main board.
c78dae99-0409-4c62-be5c-55c14e53d05b.jpg
I received the board with the tactile push button broken during shipping, but was intact case was broken and I replaced all the push button.
a103addb-7d0a-43cc-846c-5fe185c67d6f.jpg
one more info... the processor in the board is ATMEGA128A
11330ece-a692-4210-bc94-0933b85aa892.jpg

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jhsa
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sun Nov 19, 2017 5:58 pm

Ha, how small is the world.. I think I already helped fixing that transmitter on RC Groups :) I bet it is the same.. I remember the car thing :)

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sun Nov 19, 2017 6:05 pm

Here:

https://www.rcgroups.com/forums/showthr ... 1/page1600

try reading from post #23999
I bet it is the same radio..

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Wed Nov 22, 2017 6:22 pm

@ Jhsa,
I gone thro the Rcg link and removed my Soldering and re-Soldered the cable to the main board. I have removed the main board from TX. and connecting on the programmer.
8fe251f8-98b9-44d1-91bf-970b57b987f7.jpg
I used pin 4 as Gnd with Vcc, I get 5v to the board after connecting the AVR programmer and I have checked for continuity for all the pins using multimeter and they are fine....
b035b4ef-e778-4e85-9be9-ddc0cab64c3a.jpg
But still the same ERROR... :( :( :(
cd8ecbbe-3a35-4f9d-9e2f-bfa0ef51a7d1.jpg
Last Info, I get same error when I have only the AVR programmer connected to the PC(without ribbon cable and board)

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jhsa
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Wed Nov 22, 2017 6:42 pm

What settings do you have in eepe Burn menu/Configure?
Also, please post some good resolution pictures from both sides of your UsbAsp programmer. We would like to have a good look at it.

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Wed Nov 22, 2017 7:02 pm

Attached the photo...
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ff119e96-15a6-400e-9759-1b72fe2ab76f.jpg
e6ea7736-5f7b-4ed2-b1c6-df57bf657b35.jpg
273a8237-1cb9-4069-8456-e2b6ab3ff17b.jpg

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jhsa
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Wed Nov 22, 2017 7:21 pm

In eepe Burn configure please change

"mcu" m128

"Extra arguments", leave blank for now

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Wed Nov 22, 2017 7:24 pm

Can you please take a better picture of the programmer? I would like to see the values of the resistors.

Also to which pin of the programmer are you connecting the Ground from the radio's mainboard?

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Wed Nov 22, 2017 7:52 pm

a7b0c9d4-426e-4893-a319-942a800fd5a6.jpg
Better pics of the programmer and pin 4 is connected to GND.

Tried with "mcu" m128 and no "Extra arguments" and still the same ERROR.

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Wed Nov 22, 2017 7:57 pm

Please try again with -B 100 or -b 100 in the extra arguments. I can't remember which of the two is the correct one. I think it is -B100

Are you sure you never used the -F option? That could brick your board..

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Re: Turnigy 9x with Flysky TH9x main board

Post by ReSt » Wed Nov 22, 2017 11:56 pm

I used pin 4 as Gnd with Vcc,
Some programmers have ground on pins 4,6,8,10 but some not.

Reinhard
image001.jpg
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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Thu Nov 23, 2017 1:46 am

Please connect your programmer to the board, and then take a good picture so we can see all the connections..

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Re: RE: Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Thu Nov 23, 2017 3:32 am

jhsa wrote:Please connect your programmer to the board, and then take a good picture so we can see all the connections..

João
Attached the pic...Image

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Thu Nov 23, 2017 12:08 pm

You said you connected the Ground to pin 4 of the programmer. Well, pin 4 is not Ground. Pin 3 is.. please look at the connector's diagram "ReSt" posted above..

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Re: RE: Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Thu Nov 23, 2017 4:13 pm

jhsa wrote:You said you connected the Ground to pin 4 of the programmer. Well, pin 4 is not Ground. Pin 3 is.. please look at the connector's diagram "ReSt" posted above..

João
@jhsa,@Rest... I will try changing pin4 to pin10

I was able to get 5v with Vcc against pin4, if it's not ground, then I should not get voltage reading.
I used same connection and programmer to my old 9x board long time back, I cut the unused cable shorter to have a mark, used the same now....

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Re: Turnigy 9x with Flysky TH9x main board

Post by ReSt » Thu Nov 23, 2017 4:36 pm

Check it with an Ohm-meter at the programmer (without a cable connected).
If pins 4,6,8,10 are connected to ground than it should work with pin4.
But I do really own one programmer, where only pins 8 and 10 are connected to ground.
(And it did not flash when iI had ground connected to pin 4)

Reinhard

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Thu Nov 23, 2017 7:29 pm

Reinhard, according to the connector pinout you posted above, pin 4 is not ground, it is (TXD)???

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Re: Turnigy 9x with Flysky TH9x main board

Post by ReSt » Thu Nov 23, 2017 9:35 pm

This is correct.
But there exists another layout according to this picture

Reinhard
image003.jpg
image003.jpg (16.82 KiB) Viewed 1325 times
and as I said before, I have USBASP programmers with both layouts

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sat Nov 25, 2017 8:47 am

Well, I checked... My programmer has 4,6,8,10 as Ground double checked with Ohm-meter....

I re-soldered with 10pin as Ground and check the Voltage against Vcc(2pin) and GND(10pin) and got 5v.

I rechecked the if cable is faulty, but it link fine tested with Ohm-meter after soldering....

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Re: Turnigy 9x with Flysky TH9x main board

Post by ReSt » Sat Nov 25, 2017 10:12 am

So I would assume that either the radio is bricked or may be the crystal is defective.
In both cases, supplying an external clock signal could work.

Reinhard

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sat Nov 25, 2017 10:17 am

You could also remove the big capacitor under the Crystal.. It is.on the Reset line..

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Re: Turnigy 9x with Flysky TH9x main board

Post by egpurusotaman » Sat Nov 25, 2017 10:53 am

can you please point out please... (big capacitor under the Crystal), Do I need to replace it..

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Re: Turnigy 9x with Flysky TH9x main board

Post by jhsa » Sat Nov 25, 2017 11:09 am

The orange capacitor near the Crystal. Just remove it..

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