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07-06-2014, 08:20 PM | #1 (permalink) |
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Join Date: Jan 2014
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bad day, dx7s lost signal at less than 10 metters
Today i crash my goblin 770 and damaged all kit.
After this i tested range of my TX dx7s, and it lost signal in less than 10 or 15 meters. I tried with 3 others RX, hás the same pbm. Why it is with signal? I use 2 RX dsmx genuine, and i already flew to more than 6 months with him.
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Prôtos 500 stretch Trex 700 nitro Pro Flybar powered by OS 91HZ-ps Trex 700 nitro Pro FBL powered by OS 105HZ drs sk540 Goblin black thunder powered by quantum IKON2 Last edited by ftomazi; 07-07-2014 at 10:53 AM.. |
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07-06-2014, 10:27 PM | #2 (permalink) |
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Join Date: Jun 2008
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Too bad you didnt low power/range test before you flew. I havent heard reports of the DX7s having module problems but it does happen. The RF section is fairly sensitive and they do fail from time to time. If you cant get a reliable range test it needs to go in for service.
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Too many helis & Too many planks Lots of DX radios & A couple Futaba 72mhz radios AMA member & Full scale plank driver HELIFREAK !!! |
07-06-2014, 10:52 PM | #3 (permalink) |
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Join Date: Sep 2011
Location: Dallas
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7s Poor Range Problem
Had the exact same problem with my 7s.
Fix Remove the back Remove the antenna coax connector Remove the RF module re install RF module and antenna coax Range test 7s with back off. Fin the above steps Fixed my 7s range problem. Why? I think it was a lose antenna connector but it could have been the RF module connection. I also put in a new 9$ antenna. A new antenna was cheep and super easy install. Figured as long as I had the back off I might as well spend the 9$. Again My 7s range problem was just the antenna connector coming lose. Note: All this work will not affect your 7s warranty. Antenna R&R is a user replaceable item.
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Align450L / 470/150 DFC/Blade stuff DJI/AR Drone Last edited by DPW; 07-08-2014 at 03:17 PM.. |
07-07-2014, 07:20 AM | #4 (permalink) |
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Thread Starter
Join Date: Jan 2014
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I have the new antenna, and I replaced and tested, but problem continuous.
definitely is not wrong with the antenna. only difference is that I charged the battery in the original charger for the first time in 1 year of use
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Prôtos 500 stretch Trex 700 nitro Pro Flybar powered by OS 91HZ-ps Trex 700 nitro Pro FBL powered by OS 105HZ drs sk540 Goblin black thunder powered by quantum IKON2 |
07-07-2014, 09:53 PM | #5 (permalink) |
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Join Date: Sep 2011
Location: Dallas
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RF Module r Antenna
I've read that if you run a radio a long time with out an antenna the RF module can be damaged.
but I don't know the time to damage the RF module. I ran my 7s with a disconnected antenna connector for maybe 3 flights before I changed / found out it was the antenna connector. Again The only other thing I did was unscrew / pulled the RF module and looked it over with a 10x and re-installed.
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Align450L / 470/150 DFC/Blade stuff DJI/AR Drone Last edited by DPW; 07-08-2014 at 01:33 PM.. |
07-08-2014, 07:31 AM | #6 (permalink) |
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Thread Starter
Join Date: Jan 2014
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Yes, I too read, that turn it on tx without antenna the module RF burn, but I never turned on without antenna.
Yesterday I removed module RF and re install, test again, the problem continues. In my country not exists retail spektrum, I want buy a new module to replace, but i don't find new module to buy, anyone know where find?
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Prôtos 500 stretch Trex 700 nitro Pro Flybar powered by OS 91HZ-ps Trex 700 nitro Pro FBL powered by OS 105HZ drs sk540 Goblin black thunder powered by quantum IKON2 |
07-08-2014, 03:14 PM | #7 (permalink) |
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Join Date: Sep 2011
Location: Dallas
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Proprietary Parts
Prior to fixing my 7s I tried to find a RF module that would work.
Now I have 8 7s 7 6i I knew the 6i RF module would not work in a 7s but the 7 and 8 looked similar and they might be good for a 7s RF module. I posted this question on Heli Freak but got no response and could not find anyone selling Spektrum proprietary RF modules. I found the only way to test, repair, or replace a RF module is call HH then send in your radio to HH.
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Align450L / 470/150 DFC/Blade stuff DJI/AR Drone Last edited by DPW; 07-08-2014 at 08:27 PM.. |
07-09-2014, 06:39 AM | #8 (permalink) | |
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Thread Starter
Join Date: Jan 2014
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Quote:
can I buy a old dx7 cheaper to use rf module in my dx7s? PS. Yesterday I removed RF board of DX5e and put in my dx7s but not work, it not turn on.
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Prôtos 500 stretch Trex 700 nitro Pro Flybar powered by OS 91HZ-ps Trex 700 nitro Pro FBL powered by OS 105HZ drs sk540 Goblin black thunder powered by quantum IKON2 Last edited by ftomazi; 07-09-2014 at 11:26 AM.. |
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07-09-2014, 01:37 PM | #9 (permalink) |
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Join Date: Jun 2008
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You cannot mix and match RF boards. If you start doing this you are likely going to do more damage somewhere else. This is not a user replaceable item. it needs to be serviced by someone who is qualified. It then needs to be tested for proper performance by someone who is also qualified.
I understand the problems with trying to do this from Brazil.
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Too many helis & Too many planks Lots of DX radios & A couple Futaba 72mhz radios AMA member & Full scale plank driver HELIFREAK !!! |
07-09-2014, 02:18 PM | #10 (permalink) | |
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Thread Starter
Join Date: Jan 2014
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Quote:
Obviously before fly i needto test a lot... Ranges, packets losted etc...
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Prôtos 500 stretch Trex 700 nitro Pro Flybar powered by OS 91HZ-ps Trex 700 nitro Pro FBL powered by OS 105HZ drs sk540 Goblin black thunder powered by quantum IKON2 |
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07-09-2014, 05:37 PM | #11 (permalink) |
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Join Date: Sep 2011
Location: Dallas
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7 7s 8 RF Module
No
I picked up a used 7 that had case damage for 35$ to swap RF modules but As I stated above I fixed / tested my 7s with a new antenna. So I never got a chance to swap 7 or 8 RF modules into my 7s. Again Finding / buying a damaged 7 is rair My recommendation: Call HH tec support and ask for their help. Who knows HH might be able to find a way to repair your radio.
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Align450L / 470/150 DFC/Blade stuff DJI/AR Drone |
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