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« on: March 19, 2011, 10:41:59 PM »
aditya
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hello everyone
i have a 6 channel skytech t6i 8604 ace rc transmitter and reciever.
recently during changing transmitter batteries , by mistake i connected battery to transmitter in wrong polarity.
after that , the transmitter was not responding.
it is a big problem to me and i m completely unaware of transmitter electronics.
can anyone help me?
thanks.
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« Reply #1 on: March 20, 2011, 12:24:27 AM »
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"IF" there is a fail safe fuse then just replace it... (i had similar issues on the spektrum dx7 and had to just to replace the fuse and the tx was buzzing again)
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« Reply #2 on: March 20, 2011, 06:52:02 AM »
saikat
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Your tx has a diode for reverse polarity protection - in all
probablity it has blown.

see this link
http://www.siriuselectronics.com/index.php?main_page=page&id=29

try jumpering the diode it will probably work -- be sure of your battery
polarity once you have bypassed the diode.
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« Reply #3 on: March 20, 2011, 08:55:31 AM »
aditya
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first of all thanks for quick response...
sir mine transmitter is skytech t6i 8604  not  hitec.
http://www.tiger.com.tw/product/4839-F.html
on above link , u can see image of that transmitter. it comes with raptor 30 v2.
thanks
« Last Edit: March 20, 2011, 09:34:35 AM by anwar » Logged

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« Reply #4 on: March 20, 2011, 08:58:19 AM »
aditya
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sir
"IF" there is a fail safe fuse then just replace it... (i had similar issues on the spektrum dx7 and had to just to replace the fuse and the tx was buzzing again)
after opening the transmitter , i found that there is no fail safe fuse .
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« Reply #5 on: March 20, 2011, 10:58:51 AM »
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your tx is a rebranded hitec optic 6 sport
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« Reply #6 on: March 20, 2011, 01:41:08 PM »
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As you have already opened the Tx, Just unscrew the Encoder card from Cabinet and trace the Zener/7805 IC. Trace from Power input terminals and you surely find this. Please mark while opening the jumpers from Pots, Tx Cards, Display & other switches so that you can refix them in proper location.
Now, try to find out as above(Any blown out items) or take both side photo and place here.

You will surely be flooded with help and your Tx will be cured.

Thanks
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« Reply #7 on: March 20, 2011, 04:17:25 PM »
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ok sir , i m posting some pics of transmitter circuit.
me completely unaware of transmitter ckt.
where can i find quoted i.c.?
thanks.
« Last Edit: March 20, 2011, 09:29:47 PM by anwar » Logged

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« Reply #8 on: March 20, 2011, 05:09:03 PM »
aditya
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[Admin Note] Unwanted "Quote" removed... use "Reply" instead... See usage guidelines : http://www.rcindia.org/rc-india-forum/forum-usage-tips/


ok sir , i m posting some pics of transmitter circuit.
me completely unaware of transmitter ckt.
where can i find quoted i.c.?
thanks.
[/quote]here r the pics.

DSC07614.jpg
Re: help needed in repairing transmitter
* DSC07614.jpg (62.83 KB, 640x480 - viewed 690 times.)
« Last Edit: March 20, 2011, 09:30:49 PM by anwar » Logged

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« Reply #9 on: March 20, 2011, 05:17:07 PM »
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[Admin Note] Unwanted "Quote" removed... use "Reply" instead... See usage guidelines : http://www.rcindia.org/rc-india-forum/forum-usage-tips/

ok sir , i m posting some pics of transmitter circuit.
me completely unaware of transmitter ckt.
where can i find quoted i.c.?
thanks.
[/quote]here r the pics.
[/quote]another one..

DSC07615.jpg
Re: help needed in repairing transmitter
* DSC07615.jpg (43.29 KB, 640x480 - viewed 668 times.)
« Last Edit: March 20, 2011, 09:30:39 PM by anwar » Logged

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« Reply #10 on: March 21, 2011, 02:37:01 AM »
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What is the power cord jumper from battery to Encoder PCB ? Blue  in left of First Pic ?


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« Reply #11 on: March 21, 2011, 10:34:54 AM »
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frm these pics , it will b more clear

DSC07636.jpg
Re: help needed in repairing transmitter
* DSC07636.jpg (52.11 KB, 640x480 - viewed 736 times.)
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« Reply #12 on: March 21, 2011, 10:36:54 AM »
aditya
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left blue wire is for 6th channel , i think....

DSC07642.jpg
Re: help needed in repairing transmitter
* DSC07642.jpg (80.2 KB, 640x480 - viewed 608 times.)
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« Reply #13 on: March 21, 2011, 11:32:34 AM »
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Your tx has a diode for reverse polarity protection - in all
probablity it has blown.



 The reverse polarity protection diode is like a one way valve. It will block voltage and will never blow.
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« Reply #14 on: March 21, 2011, 11:48:49 AM »
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yaa , i also think so...
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« Reply #15 on: March 21, 2011, 11:50:04 AM »
aditya
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guys , show interest in  resolving the issue......
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« Reply #16 on: March 21, 2011, 12:05:23 PM »
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Your best bet is to contact a local modeller who has some knowledge of the electronics used. Without a circuit diagram or examining the set, it would be difficult to effect a diagnosis.
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« Reply #17 on: March 22, 2011, 10:13:11 AM »
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Please check the followings are correct or not?
1. Battery incoming terminals.
2. First soldering in PCB.
3. Need close up as not clear for low resolution.
4. If possible, both side high resolution photo. If required, also upload the photo in other image host lie tinypic or imageshack.us.

Possibly the PCB needs to be checked first.

DSC07642_1.jpg
Re: help needed in repairing transmitter
* DSC07642_1.jpg (80.65 KB, 640x480 - viewed 610 times.)
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« Reply #18 on: March 22, 2011, 09:18:02 PM »
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here is the link for a high resolution pic.
i tried for best pic in high resolution. can be zoom easily without breaking pixels.
http://img41.imageshack.us/i/transmitterpic.jpg/
pcb can be inspected clearly here.
thanks sir
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« Reply #19 on: March 22, 2011, 09:22:25 PM »
aditya
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also checked in marked areas
1 and 2 are correctly joined.
in marked area 3 only a screw is fitted , no connection there.
thanks.
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« Reply #20 on: March 22, 2011, 11:05:29 PM »
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Aditya

The IC ( LM 324 ,the black rectangular thing with 14 leads)on top side of the buzzer (Round thing) can you send a close up photo of it?
On the right hand side of the picture there is a diode marked D1 on the circuit board, I think this is the diode we are looking for.But I am not sure ,only from picture it is hard to tell.But do send me a good picture of this side also which I can magnify.



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« Reply #21 on: March 24, 2011, 06:29:35 AM »
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Aditya,
The right side PCB picture I need to check as power first comes here. The PCB is attached with back side of the Tx.
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« Reply #22 on: March 25, 2011, 04:59:19 PM »
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heyy all
tried some soft hands and logic on pcb,s ...
got some positive results....
tx is responsing up to a extent....
it has only 2 ic,s ..
1 for memory and 1 is op amp...
both r working....
suggestions please....
thanks..
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« Reply #23 on: April 04, 2011, 03:56:02 PM »
aditya
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hi all...
thanks for last responses and suggestions..
due to ur suggestions and little electronics knowledge of mine , ma skytech t6i transmitter is working now. all the 6 channels r properly working.
but a major issue remain as it is....
the computerized display is not responding at all...
display is completely blank.
problem starts from the time when i accidentally plugged battery in wrong polarity in transmitter.
reply me asap.
thanks
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« Reply #24 on: April 09, 2011, 11:34:33 PM »
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anyone have no ideas on blank computerized screen of rc transmitter?
no replies....
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