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HomeRC & PowerAircraftHelicopterRadio - Spektrum DSM › Brand New Spektrum DSMX Satt.... Watch Out!!!!
04-26-2013 09:02 PM  5 years agoPost 1
RCHSF

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NC

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I'm very disappointed in my new radio systems accessories quality. Not in the Transmitter. I love this radio, and I will keep buying spektrum. Only a Satt I bought this system brand new last June. And just about ready to install the satellite off the ar8000 that came with the radio. Never Been Used before, and I noticed the satt led was flickering on off. So at first I thought maybe the 3-wire cable was bad, but being new, I decided to swap ends around and if you press down just a little in the plug that accepts the wire harness the led will stay solid orange. So being the techie I am. I took the satt apart. To my surprise their was no solder on two of the pins going through the circuit board. Only on the bottom of three pins and on top of one. This solder joint should be free flowed all the way through each pin hole. So the pins are just barely making contact on the bottom side.

This was going in my brand new FBL Heli, had I missed this it would have resulted in a totaled model.

I have used the tx right much with smaller 6ch rx's but the 8000 or satt has never been in the air. Thank Goodness.

You can see the two pins on the left, bone dry, except a tiny spot on the oppsite side of board.

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04-26-2013 09:26 PM  5 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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Nice catch! Did you contact anyone about the problem?

Bill Whittaker

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04-26-2013 09:42 PM  5 years agoPost 3
RCHSF

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NC

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Yeah I called Horizon, they wanted me to send it in. But I protested. And I said how about e-mail a high quality picture so they can see the problem. But they said we take your word for it this time.... So they said they would send me a new one monday.

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04-26-2013 09:55 PM  5 years agoPost 4
Helipilot01

rrApprentice

ColliervilleTn

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What does the back side look like?

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04-26-2013 10:06 PM  5 years agoPost 5
RCHSF

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NC

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The back side has the solder mounds like normal. But they cant be fully making contact or this sat would work right. Anyone who has seen solder joints like this knows sometimes the tip of pins are just touching the solder, not coated, or submerged. I call it a dry joint.

If you rock it back and forth it works, so that tells the story, and the dry wells you see in the pic. Nothing else can be said.

And no the traces are not broken.

Still love my DX8, just little upset at this satt.

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04-26-2013 10:18 PM  5 years agoPost 6
Helipilot01

rrApprentice

ColliervilleTn

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You must have got the one in a billion. I've used these satellites in both DSM2 and DSMX protocol in helis and all sizes of planes and never had a moments trouble. Normally, the flashing light means that you turned off the receiver and back on without turning the TX off to establish a new bind relationship between the receiver and TX. The real test is to check the number of loss signal recordings locked into the receiver for that satellite.
My dealings with Horizon is that their straight up people and they will correct anything that is not right with their products. I encourage you to send the satellite back to them for their examination. They will correct the manufacturing process, if its required. If it does require a correction, someone in the future will appericate your follow through and it may prevent them for damaging their Heli or plane.

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04-26-2013 10:30 PM  5 years agoPost 7
RCHSF

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NC

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Yeah I know about the power being turned off, and back on and the flashing light. Either a machine or person ran out of solder on a friday near quiting time and just said F-it looks good to me.

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04-27-2013 02:44 AM  5 years agoPost 8
altima1779

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Toledo, oh u.s

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That sucks! But an FYI I have had a remote receiver come unplugged in flight and I never had as much as a glitch. Not the best situation but It does not necessarily mean disaster.

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04-27-2013 02:59 AM  5 years agoPost 9
RCHSF

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NC

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If you only have one satt for a zyx-s it does.

Only has a port for one satt.

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04-27-2013 03:06 AM  5 years agoPost 10
altima1779

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Toledo, oh u.s

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Oh yea, then that is most defiantly a major problem. Good catch!

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04-27-2013 04:53 AM  5 years agoPost 11
dkshema

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Cedar Rapids, IA

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The holes are plated-through, if the solder joint on the bottom is sound, it is not necessary for the entire via to be filled in as there is continuity through the entire plated-through hole. Even if there are circuit traces on the top surface, the lack of solder completely through the hole is of no consequence.

However, it does appear that those two pins may not have seen sufficient heat to allow the solder to flow properly and the solder joints on the bottom may be cold joints. Under good magnification you may be able to see that the connector pins were not properly wetted by the solder. You may also be able to see any fracture around the pin/solder interface if this is truly a cold solder joint.

As an aside, additional solder through the barrel of the via would increase the reliability of the solder joint, as this is a joint that needs to at least withstand the force being applied to the connector as you plug and unplug the cable.

A good, hot iron and solder would take care of those two pins in a hurry.

-----

This picture is one that Horizon of which Horizon should be made aware.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-27-2013 05:42 AM  5 years agoPost 12
RCHSF

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NC

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When I said the solder on the bottom was right, and had mounds over/on the pins. I was wrong. I looked closer,with a magnifing glass and noticed their are three solder humps near the front of the circuit board under the plastic plug. Well those are not the ones connected to the pins in the socket. Their was a peice of foam tape covering the actual pins in the socket that I could not see further back, and when I peeled it back the actual solder was flat, on top of the pins with a circle around the center pin. It was the one that was not connected. Plum dry of solder, like a tiny gap all way around the center pin. The well reachs to top of the board, from all three but pins but the center pin the well has a trace conncted to it at the top side of the board, and it could not make connection. The other two pins on either side the traces are on top of the board and they were making contact. Just the one was not.

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04-27-2013 06:44 PM  5 years agoPost 13
dkshema

rrMaster

Cedar Rapids, IA

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when I peeled it back the actual solder was flat, on top of the pins with a circle around the center pin. It was the one that was not connected. Plum dry of solder, like a tiny gap all way around the center pin
That's a whole 'nother useful bit of information and you have identified the problem. I don't know if those little connectors are part of the overall board soldering process, or if they are installed after the board is reflowed, but either way, someone missed not only the solder process, but any inspection and final test that might go on.

I hope you took pictures and sent them to Horizon before going in and making the repair. They need to get this kind of info back to the manufacturer so they can tweak their build process.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-27-2013 06:51 PM  5 years agoPost 14
RCHSF

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NC

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No I did not take a pic of the bottom. Wish I had. When I was on the phone with them they did not seem to want any pictures. I belive they just update firware, but if it's something like this they just send a new unit out. And throw the bad one in trash. And don't even report the cause of such issue like mine to the manufacture. They just dont seem to care. Thats what I got from the guy I talked to.

From now on, if I get any used satts, or new ones I'm pull them apart and check to see if they are done right. If I find any more like this with the pins unsoldered on the bottom I'll be sure to snap some good high res pictures.

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