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Old Jan 10, 2013, 03:53 AM
Registered User
Australia, NSW, Hornsby
Joined Jul 2005
947 Posts
Discussion
Cheap HK TX issue

Hi,

I just received one of these,
http://www.hobbyking.com/hobbyking/s...Lipo_RTF_.html

When it arrived I found the TX not working. Not wanting to pay to send it back to Hongkong (which would cost more than I paid for the thing) I thought I'd have a look for any obvious issues.
I found the issue, the red wire from the TX battery box has come away from the circuit board.
Does anyone know where the positive wire should be soldered to the circuit board? I've asked if anyone can provide a pic in another sub forum but posting here on the off chance that someone knows off the top of their head.

Thanks.
Al
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Old Jan 10, 2013, 04:17 AM
Registered User
United Kingdom, Bristol
Joined Aug 2008
1,774 Posts
picture will help And link was dead for me
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Old Jan 10, 2013, 04:34 AM
Registered User
Australia, NSW, Hornsby
Joined Jul 2005
947 Posts
Sorry for poor photo.
Name: Dscf1042small.jpg
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I suspect it should go to V+ (bottom centre of board) but I'd prefer not to kill it on an assumption.
Thanks.

Al
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Old Jan 10, 2013, 08:51 AM
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United States, NH, Exeter
Joined Oct 2010
99 Posts
I think it pretty safe to say it goes to the V+ pad since it looks like the black battery negative wire goes to a pad marked V-
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Old Jan 10, 2013, 09:19 AM
Dave the Rave
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Joined Jun 2007
876 Posts
I think hammer22 is right, look for other clues, like the wire length, shape, etc. to see if it looks like the red wire was once attached to that V+ pad. Sometimes, if in doubt, I will melt the solder on the pad I think is correct to see if there are any pieces of the end of the original wire that broke off still visible. If they come off onto your soldering iron, it's a pretty safe bet you're on the right track.
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Old Jan 11, 2013, 06:26 AM
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Australia, NSW, Hornsby
Joined Jul 2005
947 Posts
Thanks.
I got the TX fixed today only to find the same dodgy soldering on the rudder servo so it's still not flyable.
I'll wait to see what HK have to say before I try any more soldering.

Thanks again for the assistance all.

Al
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