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  #1  
Old 02-28-2017, 10:29 AM
txshan130 txshan130 is offline
 
Join Date: Oct 2011
Location: Katy, TX
Posts: 93
Default GNS 430 Sticky Button Repair

For those of you with "old" GNS430 or similar units...

For the last several years, my front faceplate buttons have been getting more and more unreliable. Seems like every time I went to fly it took more and more presses to activate the buttons. After checking on Garmin's repair prices, I decided I was up to the task of doing it myself

For most of us here, this would be an easy task...so here are some pics to help others make the decision which way to go! FYI, my 430 is at least 10 years old, if not a bit older.

I used DEOXIT (available at ur local Radio Shack) on the PCB and on the underside of each switch...

After putting it all back together, the switches all work like new again...very happy to have saved lots of money and time!

[IMG][/IMG]

[IMG][/IMG]

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https://www.dropbox.com/s/tjjftsowpp...x1024.jpg?dl=0

https://www.dropbox.com/s/bzez2rnc76...53656.jpg?dl=0

https://www.dropbox.com/s/kuloyt9eof...53703.jpg?dl=0

https://www.dropbox.com/s/ek5ds4lk5m...00323.jpg?dl=0

https://www.dropbox.com/s/l7n2xe21x1...00223.jpg?dl=0
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Katy, TX
RV6 N7463B

Last edited by txshan130 : 02-28-2017 at 10:48 AM.
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  #2  
Old 01-23-2018, 08:44 PM
dougbush dougbush is offline
 
Join Date: Mar 2017
Location: Santa Rosa Beach, FL
Posts: 1
Default

I'd really like to do this repair! Could you tell me more about how you did it?

I was intimidated as soon as I loosened the CDU Assembly and saw all those paper-thin ribbon cables and how little room there was to work on disconnecting them. Any tips?

Some of the ribbon cables seem to be soldered on to the backs of the concentric rotary switches--did you disconnect them? How?

How did you take those concentric rotary switches out?

How did you get the LCD out?

How does the front plastic (with the buttons and printing on it) come off?

Finally, how do the little metal dome switches come off the PCB and how do you re-attach them?
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  #3  
Old 01-23-2018, 09:20 PM
txshan130 txshan130 is offline
 
Join Date: Oct 2011
Location: Katy, TX
Posts: 93
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PM me with your phone number and a good time to call.. I will go thru it with you.
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Katy, TX
RV6 N7463B
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  #4  
Old 01-24-2018, 07:44 AM
cderk cderk is offline
 
Join Date: Sep 2015
Location: Park Ridge, NJ
Posts: 260
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I did this as well a few months ago after my enter button pretty much quit. Now its as good as new. Peeling up the plastic cover was a little nerve racking, but the DeOxit really made quick work of all of this.

I work in an engineering department, so I borrowed a 12v power supply and was able to rig up the unit in Test mode so I could bench test it after i was done with surgery. I would have hated driving 45 minutes to the hangar, only to find that i screwed something up.
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