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« on: November 04, 2011, 03:05:19 PM »
parambir
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Taking off is always an option...




Just upgraded my radio (JR 9X II) from 72 to 2.4 using FRSky set. Tested the range with Easystar (the most trusted bird of all) and yalahhhhh !!! I sent it up and way uppppp... I even tested the failsafe by switching off the Tx... It is the best system one can buy to upgrade to 2.4 without hitting a hole in the pocket...

Cheers...

Param
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« Reply #1 on: November 07, 2011, 02:29:32 PM »
Prad
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hi ,
I was as exited as you on the price front , and bought Frsky V8ft, 4 receivers and a TX module .
 last Sunday while i was flying my TX overheated and i lost a plane .
I am a electronic enthusiast o i decided to investigate and found that a ic No T212 was cooked and was overheating to the extent that when i was checking the temp it almost burnt my finger .
 The best part is that it functions when it is cold and in a Minuit it gets hot and fails .
 Now i am trying to get hold of the specifications of this ic for a replacement , does anyone have any info of this ic?
 By the way the RF board for the Rx and TX is the same , identical.
Prad Help Me
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« Reply #2 on: November 07, 2011, 02:50:42 PM »
Prad
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 Help Me

Hi . lost my plane due to failure of my TX module frsky V8FT , on opening it i find that the IC T212 gets so hot that you cant touch it .
 The module works but the servos have a delayed and jerky movement .
 It works ok for a few seconds till it heats up .
 I am looking for details for this ic ,if any of you electronic guys have the details .
 i cannot find any sort of information on the net for pin out etc .
 By the way the board is identical on both the RX and The TX , only the microcontroller is different.
 any help on the above will be appreciated .
Prad

« Last Edit: November 07, 2011, 04:26:42 PM by anwar » Logged
 

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« Reply #3 on: November 07, 2011, 04:43:41 PM »
Prad
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Here are some pictures of the frsky .
prad

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Re: FRSky and JR 9XII
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« Reply #4 on: November 07, 2011, 04:50:31 PM »
parambir
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Sorry to hear about the loss. What radio were you using this on? I have just done a couple of flights on Easystar with 4 ch Rx and Piper Cub with 8Ch Rx. No glitches and great range.
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« Reply #5 on: November 07, 2011, 04:52:34 PM »
Prad
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I am using a Futaba PCM 1024/ T9CHP.
Prad
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« Reply #6 on: November 07, 2011, 05:02:11 PM »
parambir
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Contact Chase Wu. He is the one who designs and manufactures these things. Maybe he can help.
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« Reply #7 on: November 07, 2011, 05:04:00 PM »
Prad
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Thanks , please can i have his email id so i can write to him?
Prad
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« Reply #8 on: November 08, 2011, 01:50:19 PM »
Prad
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hi ,parambir ,
 please can you do me a favor and check whether your module gets hot when you switch it on for couple of minuets ,as i have tightened the contacts on my module and it seems to work , but it does get quite hot , so i am in doubt whether it is a normal thing or some sort of defect.
prad 
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« Reply #9 on: November 08, 2011, 02:35:21 PM »
parambir
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Mine seems to working fine. I did not have any heating problems...
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« Reply #10 on: November 08, 2011, 11:19:22 PM »
Prad
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 Grin
I am so very happy , my electronics knowledge came to my rescue.
 I have many receivers and only one TX module , so I was kind of desperate , so when I found the 2.4 ghz board comman in both the tx and Rx I decided to spoil one Rx and swapped the boards , and bingo the tx started to function perfectly , no overheating .
 I traced the original cause of failure to the poor quality of connector ,used on the tx .
 Alli did was to tighten the contact with the help of a small watch screwdriver by bending the strips towards the centre to give a more firm contact .
 Also I scraped the enough edges on the plastic casing to give a better fit into the main unit .
 I have read on many forums that using the module without the antenna can burn out the ic , not though in my case , it was a poor contact .
 Now further to my experiment I have ordered the ic and will replace the one on the receiver and see if it works .
Prad
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« Reply #11 on: November 09, 2011, 08:03:15 AM »
saikat
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Which receiver has the same board ? the 8 channel one ?
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« Reply #12 on: November 09, 2011, 10:25:25 AM »
Prad
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Yes the V8fr has the same rf section
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