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uuccio(at)gmail.com
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 Posted: Wed Jul 24, 2013 4:53 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Hi List,
I have a problem that is driving me nuts. I have run out of ideas for trouble shooting this.
I have a GN430 as com 1 and a GMA240 audio panel mounted in my Kitfox. My com2 is a handheld and I haven't wired it in yet.
All the GNS and GMA functions (GPS, intercom, music, etc) work except for the radio: I cannot hear others and they cannot hear me, even though I can see the Tx and Rx symbols on the GNS's LCD display which indicates that the PTT buttons are working and that the radio is receiving *something*.
Here are the steps I have taken so far towards trouble shooting:
- I have checked that the headsets are working (the intercom works perfectly and they work on other a/c).
- I have also checked that the radio works on my bench (I can hear transmissions that I send using a handheld radio, even without mounting an antenna on the GNS).
- I have checked all the connections between the GNS and GMA connectors using a tester.
- I have turned up the volume and turned down the squelch on the GMA and on the GNS.
Has anyone had a similar experience? Am I missing something obvious that I should check? I suppose I haven't checked that the com1 channel on GMA works but I have no reason to doubt it, since the unit is new.
Any help would be greatly appreciated!
Sacha
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dave.saylor.aircrafters(a
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| Posted: Wed Jul 24, 2013 5:44 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Do you have power to all the power inputs on the 430? It needs two separate inputs, and the separation isn't intuitive. It'll still do some comm stuff without comm power, IIRC.
Other than that, if you're using 12V, are you sure it's a 12V unit, not 24?
Dave Saylor
831-750-0284 CL
On Wed, Jul 24, 2013 at 5:52 AM, Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)> wrote:
[quote] --> AeroElectric-List message posted by: Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)>
Hi List,
I have a problem that is driving me nuts. I have run out of ideas for trouble shooting this.
I have a GN430 as com 1 and a GMA240 audio panel mounted in my Kitfox. My com2 is a handheld and I haven't wired it in yet.
All the GNS and GMA functions (GPS, intercom, music, etc) work except for the radio: I cannot hear others and they cannot hear me, even though I can see the Tx and Rx symbols on the GNS's LCD display which indicates that the PTT buttons are working and that the radio is receiving *something*.
Here are the steps I have taken so far towards trouble shooting:
- I have checked that the headsets are working (the intercom works perfectly and they work on other a/c).
- I have also checked that the radio works on my bench (I can hear transmissions that I send using a handheld radio, even without mounting an antenna on the GNS).
- I have checked all the connections between the GNS and GMA connectors using a tester.
- I have turned up the volume and turned down the squelch on the GMA and on the GNS.
Has anyone had a similar experience? Am I missing something obvious that I should check? I suppose I haven't checked that the com1 channel on GMA works but I have no reason to doubt it, since the unit is new.
Any help would be greatly appreciated!
Sacha
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uuccio(at)gmail.com
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| Posted: Wed Jul 24, 2013 7:14 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Hi Dave,
Yup, power is present on both inputs and its definitely a 12v unit. The Rx (resp. the Tx) signal does appear on the LCD screen when the radio is receiving (resp. when I push the PTT button), it's just that no sound seems to be received or transmitted.
Sacha
On Jul 24, 2013, at 15:41, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:
[quote]Do you have power to all the power inputs on the 430? It needs two separate inputs, and the separation isn't intuitive. It'll still do some comm stuff without comm power, IIRC.
Other than that, if you're using 12V, are you sure it's a 12V unit, not 24?
Dave Saylor
831-750-0284 CL
On Wed, Jul 24, 2013 at 5:52 AM, Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)>
Hi List,
I have a problem that is driving me nuts. I have run out of ideas for trouble shooting this.
I have a GN430 as com 1 and a GMA240 audio panel mounted in my Kitfox. My com2 is a handheld and I haven't wired it in yet.
All the GNS and GMA functions (GPS, intercom, music, etc) work except for the radio: I cannot hear others and they cannot hear me, even though I can see the Tx and Rx symbols on the GNS's LCD display which indicates that the PTT buttons are working and that the radio is receiving *something*.
Here are the steps I have taken so far towards trouble shooting:
- I have checked that the headsets are working (the intercom works perfectly and they work on other a/c).
- I have also checked that the radio works on my bench (I can hear transmissions that I send using a handheld radio, even without mounting an antenna on the GNS).
- I have checked all the connections between the GNS and GMA connectors using a tester.
- I have turned up the volume and turned down the squelch on the GMA and on the GNS.
Has anyone had a similar experience? Am I missing something obvious that I should check? I suppose I haven't checked that the com1 channel on GMA works but I have no reason to doubt it, since the unit is new.
Any help would be greatly appreciated!
Sacha
===========
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ric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
MS -
k">http://forums.matronics.com
===========
e -
-Matt Dralle, List Admin.
t="_blank">http://www.matronics.com/contribution
===========
|
[b]
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Wed Jul 24, 2013 8:50 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. .
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tim2542(at)sbcglobal.net
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| Posted: Wed Jul 24, 2013 9:51 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Dave's suggestion is a good one and there is a test procedure in the 430 install manual to determine if you are getting complete pin engagement from the tray/panel assembly
Check the audio panel for the same issue. Next pull all the D subs and make sure all the pins are fully seated and don't push out when you try to press them out.
Tim
Sent from my iPhone
On Jul 24, 2013, at 9:49 AM, "David Lloyd" <skywagon(at)charter.net (skywagon(at)charter.net)> wrote:
[quote] Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. . .
When the 430 chassis box is mounted in the panel, it maybe set a bit too far back in the rack; maybe 1/8 inch or so. It must be fixed flush with the panel front. If it is not flush, when you slide the 430 in, all the pins do not fully engage into the chassis box receiver pin sockets. This can also happen when you install the 430 into a properly located chassis box, if the 430 is not fully drawn back into the chassis via the screw locking device.
D
[quote] ---
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uuccio(at)gmail.com
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| Posted: Wed Jul 24, 2013 10:24 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Thanks guys. I hadn't thought of that but it seems like a good place to look. When my GNS slides in, it does in fact have some trouble doing so. I'll check that and report any findings.
Regards
Sacha
On Jul 24, 2013, at 19:50, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:
[quote]Dave's suggestion is a good one and there is a test procedure in the 430 install manual to determine if you are getting complete pin engagement from the tray/panel assembly
Check the audio panel for the same issue. Next pull all the D subs and make sure all the pins are fully seated and don't push out when you try to press them out.
Tim
Sent from my iPhone
On Jul 24, 2013, at 9:49 AM, "David Lloyd" <skywagon(at)charter.net (skywagon(at)charter.net)> wrote:
[quote] Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. . .
When the 430 chassis box is mounted in the panel, it maybe set a bit too far back in the rack; maybe 1/8 inch or so. It must be fixed flush with the panel front. If it is not flush, when you slide the 430 in, all the pins do not fully engage into the chassis box receiver pin sockets. This can also happen when you install the 430 into a properly located chassis box, if the 430 is not fully drawn back into the chassis via the screw locking device.
D
[quote] ---
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ceengland7(at)gmail.com
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| Posted: Wed Jul 24, 2013 12:37 pm Post subject: Radio not working (GNS430 and GMA240 setup) |
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Don't forget *all* the grounds, too. I tried to help a friend with a similar issue several years ago; even spoke directly with a Garmin tech & told him exactly which pins were hooked up. The tech told me we were golden on all the wires. Radio worked when inserted in another a/c. He finally took it to a radio shop. They took one look at the back of the tray & said, "You're missing that ground right there." They installed the ground, & everything worked. Sorry to say I don't know which ground they added (there are several).
On 07/24/2013 01:23 PM, Sacha wrote:
[quote] Thanks guys. I hadn't thought of that but it seems like a good place to look. When my GNS slides in, it does in fact have some trouble doing so. I'll check that and report any findings.
Regards
Sacha
On Jul 24, 2013, at 19:50, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:
| Quote: | Dave's suggestion is a good one and there is a test procedure in the 430 install manual to determine if you are getting complete pin engagement from the tray/panel assembly
Check the audio panel for the same issue. Next pull all the D subs and make sure all the pins are fully seated and don't push out when you try to press them out.
Tim
Sent from my iPhone
On Jul 24, 2013, at 9:49 AM, "David Lloyd" <skywagon(at)charter.net (skywagon(at)charter.net)> wrote:
| Quote: | Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. . .
When the 430 chassis box is mounted in the panel, it maybe set a bit too far back in the rack; maybe 1/8 inch or so. It must be fixed flush with the panel front. If it is not flush, when you slide the 430 in, all the pins do not fully engage into the chassis box receiver pin sockets. This can also happen when you install the 430 into a properly located chassis box, if the 430 is not fully drawn back into the chassis via the screw locking device.
D
| Quote: | ----- Original Message -----
From: Dave Saylor (dave.saylor.aircrafters(at)gmail.com)
To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)
Sent: Wednesday, July 24, 2013 6:41 AM
Subject: Re: Radio not working (GNS430 and GMA240 setup)
Do you have power to all the power inputs on the 430? It needs two separate inputs, and the separation isn't intuitive. It'll still do some comm stuff without comm power, IIRC.
Other than that, if you're using 12V, are you sure it's a 12V unit, not 24?
Dave Saylor
831-750-0284 CL
On Wed, Jul 24, 2013 at 5:52 AM, Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)>
Hi List,
I have a problem that is driving me nuts. I have run out of ideas for trouble shooting this.
I have a GN430 as com 1 and a GMA240 audio panel mounted in my Kitfox. My com2 is a handheld and I haven't wired it in yet.
All the GNS and GMA functions (GPS, intercom, music, etc) work except for the radio: I cannot hear others and they cannot hear me, even though I can see the Tx and Rx symbols on the GNS's LCD display which indicates that the PTT buttons are working and that the radio is receiving *something*.
Here are the steps I have taken so far towards trouble shooting:
- I have checked that the headsets are working (the intercom works perfectly and they work on other a/c).
- I have also checked that the radio works on my bench (I can hear transmissions that I send using a handheld radio, even without mounting an antenna on the GNS).
- I have checked all the connections between the GNS and GMA connectors using a tester.
- I have turned up the volume and turned down the squelch on the GMA and on the GNS.
Has anyone had a similar experience? Am I missing something obvious that I should check? I suppose I haven't checked that the com1 channel on GMA works but I have no reason to doubt it, since the unit is new.
Any help would be greatly appreciated!
Sacha
===========
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ric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
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k">http://forums.matronics.com
===========
e -
-Matt Dralle, List Admin.
t="_blank">http://www.matronics.com/contribution
===========
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href="http://forums.matronics.com">http://forums.matronics.com
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uuccio(at)gmail.com
Guest
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| Posted: Thu Jul 25, 2013 11:14 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Thanks all for your help. It turns out that the unit was not sufficiently screwed in. The unit appeared to work but did not work completely. The installation manual says it needs a minimum of three turns of the Allen key and mine only had two turns. I wiggled the unit and managed to squeeze an extra turn into it and bingo! It works perfectly!
Thanks all for your help, I can't tell you how relieved I feel... I had been trying to fix this for months.
My next project is to wire in the handheld (its an Icom A3E)... Does anyone know if this is possible?
On Jul 24, 2013, at 22:36, Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
[quote] Don't forget *all* the grounds, too. I tried to help a friend with a similar issue several years ago; even spoke directly with a Garmin tech & told him exactly which pins were hooked up. The tech told me we were golden on all the wires. Radio worked when inserted in another a/c. He finally took it to a radio shop. They took one look at the back of the tray & said, "You're missing that ground right there." They installed the ground, & everything worked. Sorry to say I don't know which ground they added (there are several).
On 07/24/2013 01:23 PM, Sacha wrote:
| Quote: | Thanks guys. I hadn't thought of that but it seems like a good place to look. When my GNS slides in, it does in fact have some trouble doing so. I'll check that and report any findings.
Regards
Sacha
On Jul 24, 2013, at 19:50, Tim Andres <tim2542(at)sbcglobal.net (tim2542(at)sbcglobal.net)> wrote:
| Quote: | Dave's suggestion is a good one and there is a test procedure in the 430 install manual to determine if you are getting complete pin engagement from the tray/panel assembly
Check the audio panel for the same issue. Next pull all the D subs and make sure all the pins are fully seated and don't push out when you try to press them out.
Tim
Sent from my iPhone
On Jul 24, 2013, at 9:49 AM, "David Lloyd" <skywagon(at)charter.net (skywagon(at)charter.net)> wrote:
| Quote: | Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. . .
When the 430 chassis box is mounted in the panel, it maybe set a bit too far back in the rack; maybe 1/8 inch or so. It must be fixed flush with the panel front. If it is not flush, when you slide the 430 in, all the pins do not fully engage into the chassis box receiver pin sockets. This can also happen when you install the 430 into a properly located chassis box, if the 430 is not fully drawn back into the chassis via the screw locking device.
D
| Quote: | ----- Original Message -----
From: Dave Saylor (dave.saylor.aircrafters(at)gmail.com)
To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)
Sent: Wednesday, July 24, 2013 6:41 AM
Subject: Re: Radio not working (GNS430 and GMA240 setup)
Do you have power to all the power inputs on the 430? It needs two separate inputs, and the separation isn't intuitive. It'll still do some comm stuff without comm power, IIRC.
Other than that, if you're using 12V, are you sure it's a 12V unit, not 24?
Dave Saylor
831-750-0284 CL
On Wed, Jul 24, 2013 at 5:52 AM, Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)> wrote:
| Quote: | --> AeroElectric-List message posted by: Sacha <uuccio(at)gmail.com (uuccio(at)gmail.com)>
Hi List,
I have a problem that is driving me nuts. I have run out of ideas for trouble shooting this.
I have a GN430 as com 1 and a GMA240 audio panel mounted in my Kitfox. My com2 is a handheld and I haven't wired it in yet.
All the GNS and GMA functions (GPS, intercom, music, etc) work except for the radio: I cannot hear others and they cannot hear me, even though I can see the Tx and Rx symbols on the GNS's LCD display which indicates that the PTT buttons are working and that the radio is receiving *something*.
Here are the steps I have taken so far towards trouble shooting:
- I have checked that the headsets are working (the intercom works perfectly and they work on other a/c).
- I have also checked that the radio works on my bench (I can hear transmissions that I send using a handheld radio, even without mounting an antenna on the GNS).
- I have checked all the connections between the GNS and GMA connectors using a tester.
- I have turned up the volume and turned down the squelch on the GMA and on the GNS.
Has anyone had a similar experience? Am I missing something obvious that I should check? I suppose I haven't checked that the com1 channel on GMA works but I have no reason to doubt it, since the unit is new.
Any help would be greatly appreciated!
Sacha
===========
-
ric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
MS -
k">http://forums.matronics.com
===========
e -
-Matt Dralle, List Admin.
t="_blank">http://www.matronics.com/contribution
===========
href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Thu Jul 25, 2013 2:20 pm Post subject: Radio not working (GNS430 and GMA240 setup) |
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Sacha,
I am glad my suggestion worked out to fix the 430 problem . . .
Here is another tip about installing the 430 back into the receiver chassis whenever you have removed it.
I don't recommend that you draw the 430 back into it chassis by only using the Allen drive screw-jack. This is hard on the small screw assembly and could cause it to fail later on.
I always insert the 430 using my thumbs on the panel ends until I feel engagement resistance. Then, I take up 1 turn on the screw jack, then using my thumbs again, I press and rock the 430 further back into the chassis and then use the screw-jack to take up the slack until it is fully seated.
Two reasons for doing this..... using your fingers can detect if the 430 is hanging up going into the chassis and you can stop and investigate. #2.. is to take the torqueing wear and tear off the screw- jack mechanism. It is small and uses nylon parts. It is not very durable if you are the ham fisted slam it in type.....
Dave
[quote] ---
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uuccio(at)gmail.com
Guest
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| Posted: Thu Jul 25, 2013 8:21 pm Post subject: Radio not working (GNS430 and GMA240 setup) |
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David,
Absolutely. In fact I did exactly as you said. I still can't believe it's all working, it feels like a luxury not to have to grab the handheld everytime I need to make a radio call!
I've been wondering.... Is there a way that one can wire in the handheld (Icom A3E) to the audio panel as a standby com2?
I already have an adaptor to use the headset with the handheld, but it would require me to unplug the headset from the aircraft and plug it into the handheld. Is there a way that I wire things so I just have to select com2 on the audio panel?
Sacha
On Jul 26, 2013, at 0:19, "David Lloyd" <skywagon(at)charter.net> wrote:
[quote] Sacha,
I am glad my suggestion worked out to fix the 430 problem . . .
Here is another tip about installing the 430 back into the receiver chassis whenever you have removed it.
I don't recommend that you draw the 430 back into it chassis by only using the Allen drive screw-jack. This is hard on the small screw assembly and could cause it to fail later on.
I always insert the 430 using my thumbs on the panel ends until I feel engagement resistance. Then, I take up 1 turn on the screw jack, then using my thumbs again, I press and rock the 430 further back into the chassis and then use the screw-jack to take up the slack until it is fully seated.
Two reasons for doing this..... using your fingers can detect if the 430 is hanging up going into the chassis and you can stop and investigate. #2.. is to take the torqueing wear and tear off the screw- jack mechanism. It is small and uses nylon parts. It is not very durable if you are the ham fisted slam it in type.....
Dave
---
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Mauledriver(at)nc.rr.com
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| Posted: Fri Jul 26, 2013 6:04 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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I too ran into this.
In fact, it took a good bit of 'shimming' to get the G430, an SL30 and a PMA9000EX to all 'line up'. They each have a slightly different criteria for relating to the front panel.
Bill
On 7/24/2013 12:49 PM, David Lloyd wrote:
[quote] Sacha,
My suggestion is a bit far out, but, I have witnessed the 430 problem. . .
When the 430 chassis box is mounted in the panel, it maybe set a bit too far back in the rack; maybe 1/8 inch or so. It must be fixed flush with the panel front. If it is not flush, when you slide the 430 in, all the pins do not fully engage into the chassis box receiver pin sockets. This can also happen when you install the 430 into a properly located chassis box, if the 430 is not fully drawn back into the chassis via the screw locking device.
D
[quote] ---
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Fri Jul 26, 2013 6:49 am Post subject: Radio not working (GNS430 and GMA240 setup) |
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Sacha,
I 'assume' what you are asking is a method to be able to "plug-in" a handheld into the aircraft's antenna system.
There is and Bob has addressed this before in one of his many responses.
In summary, (others will point to the details. . .) One builds or buys a small shielded box with the main ship's antenna cable going thru it via BNC connectors, but, broken via a jack and plug set-up with the jack connector accessible via the panel.
The handheld's antenna is removed and a short shielded cable is attached and the other end does to the new switch box.input located on the panel. The connection is made such that the main comm's are disconnected from the antenna and the handheld now has command of the ship's antenna.
Bob or others will point to the detailed article & method of doing this or where to purchase.....Dave
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