Damaged Futaba 6EX TX - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Jan 25, 2013, 06:14 AM
Registered User
Discussion

Damaged Futaba 6EX TX


Hello all,
I've made a stupid thing reversing the battery polarity (by mistake) of my 6EX transmitter. Now the TX module seems dead, no leds and no TX, only the LCD is working and the controls. Anybody knows how could I repair it?
Sign up now
to remove ads between posts
Jan 26, 2013, 09:55 AM
Registered User

repaired


Hi there, I'm glad to report that the radio is repaired. For anybody with this problem, dead(6EX) TX after reverse polarity, check the voltage regulator on the TX board, it is a SMD 7805, replacing it solved the problem.
Jan 26, 2013, 11:11 AM
A man with too many toys
The older Futaba radios had a diode to prevent that from happening. I don’t know why they have left out that on the newer radios.

.
Jan 26, 2013, 12:06 PM
Registered User
pilotpete2's Avatar
If I'm not mistaken, the diode in the entry level Futaba's was in the charge jack circuit to prevent reverse charging the Tx battery. More expensive Futaba's use a PolySwitch circuit breaker instead of the diode. I'm pretty sure that if you connect the battery to the radio with reverse polarity, there's no protection against that
Futaba's use of a standard servo plug for the Tx battery does make that very hard to do. You really have to wire the connector backwards to let out the magic smoke

delwinnikolov,
Nice to hear you have it fixed
Pete
Jan 26, 2013, 03:09 PM
Registered User
Quote:
Originally Posted by delwinnikolov
Hi there, I'm glad to report that the radio is repaired. For anybody with this problem, dead(6EX) TX after reverse polarity, check the voltage regulator on the TX board, it is a SMD 7805, replacing it solved the problem.
Thank you, any similarity to the photos and information shown:
Futaba - T6A - Reverse Polarity DIY repair.
"the element that had burned was a power regulator, the equivalent one LM78L05 "

Alan T.
Alan's Hobby, Model & RC FAQ Web Links
Apr 09, 2016, 07:44 PM
Registered User
Hi guys. Same thing just happened to me, burnt my 6EX futaba due to reversed polarity. I'm trying to find this voltage regulator on the board, so I can replace it. Does any one have pictures, or can describe the location of this component on the board?
Apr 10, 2016, 03:15 PM
Registered User
Why not follow the link above ?
Apr 10, 2016, 03:56 PM
KC
KC
Registered Loiterer.
KC's Avatar
nvm...
Last edited by KC; Apr 10, 2016 at 04:02 PM.
Apr 10, 2016, 07:12 PM
Registered User
Quote:
Originally Posted by Mukenukem
Why not follow the link above ?
Because it's the link for another radio, isn't it? The one I have is the 6EX.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
futaba 6EX 2.4GHz for spektum dx6i dsmx spechty37 Non R/C Items (FS/W) 0 Jan 19, 2013 08:24 PM
Sold Damaged Flyzone Albatros Micro EP TX-R with Anylink, $35 Shipped PACubFlyer103 Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 2 Jan 16, 2013 09:06 AM
Sold Futaba 6ex 2.4ghz used joesmith285 Aircraft - General - Radio Equipment (FS/W) 2 Jan 08, 2013 12:19 AM
Sold Used Futaba 6ex transmitter and charger joesmith285 Aircraft - General - Radio Equipment (FS/W) 0 Jan 04, 2013 04:03 PM
Sold Futaba 6EX 2.4 tx / FP-TK-FSS tx module / UltraMicro Tx Ice Aircraft - General - Radio Equipment (FS/W) 3 Aug 01, 2011 08:13 AM