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rv8iator
Joined: 11 Apr 2006
Posts: 145
Location: Newberg, OR
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 Posted: Sun Mar 29, 2009 7:38 pm Post subject: GNS 430 question |
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Hello Garmin experts...
In reviewing the Garmin 430 install manual the power wiring diagram shows two 5 amp CBs on the 2 of 3 grounds. This is in addition to CBs on all the positive power supply lines. What does this accomplish? I can find nothing in the text that provides an explanation.
Chris Stone
RV-8
Newberg, OR
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Bob McC
Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON
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| Posted: Sun Mar 29, 2009 9:19 pm Post subject: GNS 430 question |
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Chris;
Not sure what you're looking at Chris. Rev M of the install manual Figure F-10 on page F-21 is the schematic for the typical installation of a GNS 430 and shows power through a 5A CB to pins 19, 20 on connector p4001 , power through a CB to pins 11, 12 of connector P4002(5A 28V or 10A 14V), and then pins 21, 22 of P4002, 77,78 of P4001, and 41 of P4006 all grounded. (no CB's) Where do you see CB's in the grounds? See page 108 of 132 at the following link. http://tinyurl.com/ccfsyq
Bob McC
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rv8iator
Joined: 11 Apr 2006
Posts: 145
Location: Newberg, OR
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| Posted: Tue Mar 31, 2009 6:04 am Post subject: GNS 430 question |
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Bob...
I have the 400 Series install manual 190-00356-02 Rev B dated November 2006. Page H-10 figure H-5 Power, lighting and antenna interconnect sheet 1 of 3.
I have attached a PDF of the page.
Also I see that your IM and my IM have different part numbers. Hmmmm?
Chris Stone
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gns430w_IM.pdf |
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rv8iator
Joined: 11 Apr 2006
Posts: 145
Location: Newberg, OR
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| Posted: Tue Mar 31, 2009 6:05 am Post subject: GNS 430 question |
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Bob...
This is the corect page from the Garmin IM 190-00356-02 Rev B November 2006
Chris
[quote]
Chris;
Not sure what you're looking at Chris. Rev M of the install manual Figure F-10 on page F-21 is the schematic for the typical installation of a GNS 430 and shows power through a 5A CB to pins 19, 20 on connector p4001 , power through a CB to pins 11, 12 of connector P4002(5A 28V or 10A 14V), and then pins 21, 22 of P4002, 77,78 of P4001, and 41 of P4006 all grounded. (no CB's) Where do you see CB's in the grounds? See page 108 of 132 at the following link. http://tinyurl.com/ccfsyq
Bob McC
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| Description: |
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Download |
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img-331054426-0001.pdf |
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25.03 KB |
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1408 Time(s) |
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Bob McC
Joined: 09 Jan 2006
Posts: 258
Location: Toronto, ON
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| Posted: Tue Mar 31, 2009 8:07 pm Post subject: GNS 430 question |
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Chris;
This is a case of misinterpretation of the information shown. First the diagram you attached does NOT show a CB in the ground wire. The labeling specifying the two ground wires shows an amperage for a CB because the wire gauge required changes depending upon which CB is used in the wire connected to pins 11,12 immediately above (based on 14 or 28 volt systems) but no CB is shown in the ground wires. The ground wire label is simply guiding you as to correctly determine the wire gauge required for these wires.
Bob McC
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rv8iator
Joined: 11 Apr 2006
Posts: 145
Location: Newberg, OR
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| Posted: Wed Apr 01, 2009 6:18 am Post subject: GNS 430 question |
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Bob...
You are absolutely right. I now see what Garmin is communicating with their schematic. Maybe a bit unconventional.
Thanks!
Chris
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