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IFD knob won’t “enter”

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Robert114 View Drop Down
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    Posted: 07 Nov 2021 at 11:31am
Does anyone know of any reason other than failure why the lower right IFD knob won’t function as the enter button when pressed? Both outer and inner knows work correctly.
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Robert114 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert114 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2021 at 11:31am
knobs*
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b2002 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote b2002 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2021 at 11:50am
Have you tried pulling out on it slightly before pressing it?  Could be internals are stuck in pressed position.  One of my lower left knobs did that, working ok now after exercising it a bit.
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Robert114 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert114 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Nov 2021 at 3:17pm
I’ll give that a try but I’ve tried “exercising” it. Seems to be in the normal non-pressed position and until my last flight it would work intermittently. I fly VFR, usually using the D-> button so I doubt I’ve worn it out. Thanks for the suggestion. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 08 Nov 2021 at 9:13am
Does the knob press work at all?  For instance, can you press it while on the map page to switch between views (e.g. north up, track up)?  If not, it sounds like a bad knob and I'd get with your dealer to have it fixed.
Steve Lindsley
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pburger Quote  Post ReplyReply Direct Link To This Post Posted: 08 Nov 2021 at 10:34am
It could be a cracked knob.  I had this problem on my AXP-340 back in 2017.  The knob was cracked, and actually slid down on the shaft such that it couldn't push the shaft in when pressed (the base of the knob would contact the front face of the unit preventing the shaft from moving inward.)

Avidyne sent me a new knob which corrected the problem.

That might not be the problem, but something to check...
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Robert114 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert114 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2021 at 6:12pm
The knob isn’t cracked. I can feel the knob click when I press it. Unfortunately, didn’t try pressing it on the map page but it definitely didn’t function as an enter key. Both the knob rotary functions worked entering a flight plan. I’ll ride out to the airport tomorrow and check the map page function but I’m not optimistic. Very frustrating since I just got the JPI EDM-900 and Aspen 2000 MAX talking to the IFD 540.

Steve, if the knob is bad, as I suspect, is it a major operation to replace the knob? My avionics shop is no longer an Avidyne dealer. Will I have to find an authorized dealer for the repair? Thanks for everyone’s suggestions.

Robert 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSteve Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2021 at 8:48am
Yes, you'll need to get to a dealer for an RMA.  Give tech support a call and they can help with any further diagnosis and guide you through the return/repair process if necessary.  Call 1-888-723-7592 or email pilotsupport@avidyne.com.
Steve Lindsley
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeS Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2021 at 11:48am
Robert,

Pull the knob off and try the same operation again using only the metal tang. Even if a tactile click is felt, the knob could still be faulty. If the unit works without the plastic knob, we can just send you a set of knobs with no need to submit an RMA.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert114 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2021 at 4:16pm
Thanks Steve and Mike. Will do. (BTW, “press func” didn’t work on the Maps page either.)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote b2002 Quote  Post ReplyReply Direct Link To This Post Posted: 23 Nov 2021 at 6:35am
Wondering if there has been any resolution to this issue?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert114 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Dec 2021 at 3:22pm
I removed the knobs and there was still no “enter” function using the metal tangs. Since it will have to go to a dealer for an RMA, I’ll wait until the plane is down for its annual next Spring. Hopefully, it’s a quick turn around and not too expensive!

Robert 
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