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acsjohn
Joined: 27 Jul 2009
Posts: 15
Location: Australia
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 Posted: Sun Feb 19, 2012 1:15 pm Post subject: Garmin 300XL NAV/COM |
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Looking for some suggestions from anyone who may recognise this problem. Yesterday after making a missed GPS approach, I noticed the 300XL screen starting to go blank.
Couldn't read anything worthwhile.
Turned the unit off for a few minutes or so and then powered up again...very faint but readable.
The unit was still working but I couldn't see enough to change frequencies etc...
Back home and in the hangar unit worked fine.
Is this a heat issue or something else? hasn't happened before and yesterday wasn't the hottest it has operated in.
Garmin info says not compulsory to have ducted cooling to the unit but a very good idea.
I don't have a cooling fan behind the avionics stack.
ambient temps were in the low 90F's.
Does anyone recognise the symptoms here?
John 40315
[quote][b]
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flysrv10(at)gmail.com
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| Posted: Sun Feb 19, 2012 3:21 pm Post subject: Garmin 300XL NAV/COM |
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My old VW Passat has the same issue with its digital display. Left in the sun, the display fades out but once the a/c cools the car, it comes alive. It started happening with age.
Do not archive.
Rob Kermanj
Sent from my iPad
On Feb 19, 2012, at 4:14 PM, John Dunne <acs(at)acspropeller.com.au (acs(at)acspropeller.com.au)> wrote:
[quote]Looking for some suggestions from anyone who may recognise this problem. Yesterday after making a missed GPS approach, I noticed the 300XL screen starting to go blank.
Couldn't read anything worthwhile.
Turned the unit off for a few minutes or so and then powered up again...very faint but readable.
The unit was still working but I couldn't see enough to change frequencies etc...
Back home and in the hangar unit worked fine.
Is this a heat issue or something else? hasn't happened before and yesterday wasn't the hottest it has operated in.
Garmin info says not compulsory to have ducted cooling to the unit but a very good idea.
I don't have a cooling fan behind the avionics stack.
ambient temps were in the low 90F's.
Does anyone recognise the symptoms here?
John 40315
[b]
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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iansdad
Joined: 06 Aug 2011
Posts: 14
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| Posted: Sun Feb 19, 2012 4:59 pm Post subject: Garmin 300XL NAV/COM |
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I had a 300XL in my Cessna here in Arizona for 5 years and it sat outside 3 of those years I never had any problems due to heat.
Date: Mon, 20 Feb 2012 07:14:20 +1000
Subject: Garmin 300XL NAV/COM
From: acs(at)acspropeller.com.au
To: rv10-list(at)matronics.com
Looking for some suggestions from anyone who may recognise this problem. Yesterday after making a missed GPS approach, I noticed the 300XL screen starting to go blank.
Couldn't read anything worthwhile.
Turned the unit off for a few minutes or so and then powered up again...very faint but readable.
The unit was still working but I couldn't see enough to change frequencies etc...
Back home and in the hangar unit worked fine.
Is this a heat issue or something else? hasn't happened before and yesterday wasn't the hottest it has operated in.
Garmin info says not compulsory to have ducted cooling to the unit but a very good idea.
I don't have a cooling fan behind the avionics stack.
ambient temps were in the low 90F's.
Does anyone recognise the symptoms here?
John 40315
[quote]
arget="_blank">http://www.matronics.com/Navigator?RV10-List
http://forums.matronics.com
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[b]
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mauledriver(at)nc.rr.com
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| Posted: Sun Feb 19, 2012 5:30 pm Post subject: Garmin 300XL NAV/COM |
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The unit I had my Maule was dim and slow when very cold... Doesnt apply to you.
I also had some water that would get into the stack and that caused the unit to not come on at first.. And then start up dim. This only happened when parked outside overnight AND if there had been rain or heavy condensate. I'd roll the plane into the sun and wait 30 mins. Then power up and go.
Bill
Sent from my iPad
On Feb 19, 2012, at 4:14 PM, John Dunne <acs(at)acspropeller.com.au (acs(at)acspropeller.com.au)> wrote:
[quote]Looking for some suggestions from anyone who may recognise this problem. Yesterday after making a missed GPS approach, I noticed the 300XL screen starting to go blank.
Couldn't read anything worthwhile.
Turned the unit off for a few minutes or so and then powered up again...very faint but readable.
The unit was still working but I couldn't see enough to change frequencies etc...
Back home and in the hangar unit worked fine.
Is this a heat issue or something else? hasn't happened before and yesterday wasn't the hottest it has operated in.
Garmin info says not compulsory to have ducted cooling to the unit but a very good idea.
I don't have a cooling fan behind the avionics stack.
ambient temps were in the low 90F's.
Does anyone recognise the symptoms here?
John 40315
[b]
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wmillson1(at)gmail.com
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| Posted: Mon Feb 20, 2012 5:56 am Post subject: Garmin 300XL NAV/COM |
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Mine did a very similar thing last summer. After about an hour it would go blank and then when it cooled off it would restart. Also the comm would become unserviceable. I bought a C-fan and installed it and it did no good. I pulled the unit and took it to my avionics shop and they said it was a power supply issue and it had to go back to Garmin. I paid their flat rate it came back working fine, I'm not sure but I think it has a new display.
Wayne Millson
53 hours and loving it!
Sent from my iPad
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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acsjohn
Joined: 27 Jul 2009
Posts: 15
Location: Australia
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| Posted: Mon Feb 20, 2012 12:51 pm Post subject: Garmin 300XL NAV/COM |
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Thanks Wayne, and others suggestions as well.This seems like a power supply issue as you've suggested.
I have been chasing intermittent problems with my comm as well and also recently a problem with my Tru Trak A/P. Tru Trak suggested it didn't seem like an A/P problem but may have been corrupted signal from the Garmin somehow. Like all things Murphys Law in aviation, it could only only happen at the worst possible time (during an approach) so I've pulled the unit and set it away for a check-up. (I've also installed a cooling fan in preparation for the units return just in case)
John 40315
On Mon, Feb 20, 2012 at 11:54 PM, Wayne <wmillson1(at)gmail.com (wmillson1(at)gmail.com)> wrote:
| Quote: | --> RV10-List message posted by: Wayne <wmillson1(at)gmail.com (wmillson1(at)gmail.com)>
Mine did a very similar thing last summer. After about an hour it would go blank and then when it cooled off it would restart. Also the comm would become unserviceable. I bought a C-fan and installed it and it did no good. I pulled the unit and took it to my avionics shop and they said it was a power supply issue and it had to go back to Garmin. I paid their flat rate it came back working fine, I'm not sure but I think it has a new display.
Wayne Millson
53 hours and loving it!
Sent from my iPad
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arget="_blank">http://www.matronics.com/Navigator?RV10-List
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le, List Admin.
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