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n81jg(at)aol.com
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 Posted: Sun Apr 20, 2008 9:39 am Post subject: Garmin 250XL problem |
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I have a VariEze with a Garmin 250XL GPS/COM. I accidentally shut off the master while flying and because of my B&C 8 amp. permanent magnet alternator I continued to feed power to the buss until I rolled out on landing. At that point the instruments showed intermittent low voltage and were flickering and cutting out. I discover the reason and turned the master back on. The next flight my 250XL began to flick off and back on in a split second several times at regular 4-5 min. intervals. It continued to work fine as it was on, but the GPS had to reboot each time. It appears that I have damaged some internal component with the low voltage episode. Does anyone know if this can be fixed easily or am I looking at a major circuit change-out?
John Greaves
VariEze N81JG
Redding, CA
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tim2542(at)sbcglobal.net
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| Posted: Sun Apr 20, 2008 12:36 pm Post subject: Garmin 250XL problem |
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Hi John, Tim In cottonwood (Cozy builder.) Those radios have two electrical feeds. I would pull the radio from the tray, find the pinout from the install manual or elsewhere and then check for continuous power to each feed as you move the harness around from the back side. I think I have a pinout for the 300 XL in a hanger near you if you need it. I bet they are the same. Also check the ground wire the same way. There is also a chance it’s the connector in the tray and you can clean those contacts with electrical cleaner while you have it out. I’m no expert but I am pretty handy with this sort of thing, and I’m off the next 3 days if you need any help. I’m just guessing but I bet the radio is fine and it’s in the tray connector or the install somewhere, probably just a coincidence it came up after your last flight.
Tim Andres
347 6138
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of N81JG
Sent: Sunday, April 20, 2008 10:34 AM
To: aeroelectric-list(at)matronics.com
Subject: Garmin 250XL problem
I have a VariEze with a Garmin 250XL GPS/COM. I accidentally shut off the master while flying and because of my B&C 8 amp. permanent magnet alternator I continued to feed power to the buss until I rolled out on landing. At that point the instruments showed intermittent low voltage and were flickering and cutting out. I discover the reason and turned the master back on. The next flight my 250XL began to flick off and back on in a split second several times at regular 4-5 min. intervals. It continued to work fine as it was on, but the GPS had to reboot each time. It appears that I have damaged some internal component with the low voltage episode. Does anyone know if this can be fixed easily or am I looking at a major circuit change-out?
John Greaves
VariEze N81JG
Redding, CA
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nuckolls.bob(at)cox.net
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| Posted: Mon Apr 21, 2008 5:36 am Post subject: Garmin 250XL problem |
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At 10:34 AM 4/20/2008 -0700, you wrote:
| Quote: | I have a VariEze with a Garmin 250XL GPS/COM. I accidentally shut off the
master while flying and because of my B&C 8 amp. permanent magnet
alternator I continued to feed power to the buss until I rolled out on
landing. At that point the instruments showed intermittent low voltage and
were flickering and cutting out. I discover the reason and turned the
master back on. The next flight my 250XL began to flick off and back on in
a split second several times at regular 4-5 min. intervals. It continued
to work fine as it was on, but the GPS had to reboot each time. It appears
that I have damaged some internal component with the low voltage episode.
Does anyone know if this can be fixed easily or am I looking at a major
circuit change-out?
|
I can't speak to the potential for damage to your
accessories but I can suggest a review of your system
architecture that allows operator mis-positioning of
switches to produce an alternator-only powering of
the bus.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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