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#v5 Audio, Ground? #v5

 

Odd situation.
I have a working v4 in a metal case (from )
It has been working fine for a long time.
I had ordered a v5 months ago and finally decided to put it to work. I installed it in the same case the v4 was using, kept everything the same.

The v5 powers up fine, display great, output power fine (into a dummy load) but NO AUDIO.
The interesting thing is that if I remove the board from the metal chassis (just unscrew it and lift it a bit so the board does not touch the metal posts, the Audio come back!
Touch the chassis with one of the 4 holes in the board, NO AUDIO!!

Any suggestions? Is the v5 substantially different from the v5 that something in the periphery can affect it? (mic, key, earphone plugs, encoder/volume, power supply)

Regards and thanks,
A


?
Andy_501
 

Maybe try nylon screws andstandoffs

via my shoephone

Sent from
On Jan 9, 2020, at 17:42, Armando Escalante <escalantea@...> wrote:

Odd situation.
I have a working v4 in a metal case (from )
It has been working fine for a long time.
I had ordered a v5 months ago and finally decided to put it to work. I installed it in the same case the v4 was using, kept everything the same.

The v5 powers up fine, display great, output power fine (into a dummy load) but NO AUDIO.
The interesting thing is that if I remove the board from the metal chassis (just unscrew it and lift it a bit so the board does not touch the metal posts, the Audio come back!
Touch the chassis with one of the 4 holes in the board, NO AUDIO!!

Any suggestions? Is the v5 substantially different from the v5 that something in the periphery can affect it? (mic, key, earphone plugs, encoder/volume, power supply)

Regards and thanks,
A


?
 

Sounds like your speaker is grounded to the chassis on one terminal and your new configuration requires the other side to be grounded or no ground at all but two separate leads.

Mo

On 01/09/20 7:34:02 PM, "Andy_501" <andrew.webb.501.ve4per@...> wrote:

Maybe try nylon screws andstandoffs

via my shoephone

Sent from
On Jan 9, 2020, at 17:42, Armando Escalante <escalantea@...> wrote:

Odd situation.
I have a working v4 in a metal case (from )
It has been working fine for a long time.
I had ordered a v5 months ago and finally decided to put it to work. I installed it in the same case the v4 was using, kept everything the same.

The v5 powers up fine, display great, output power fine (into a dummy load) but NO AUDIO.
The interesting thing is that if I remove the board from the metal chassis (just unscrew it and lift it a bit so the board does not touch the metal posts, the Audio come back!
Touch the chassis with one of the 4 holes in the board, NO AUDIO!!

Any suggestions? Is the v5 substantially different from the v5 that something in the periphery can affect it? (mic, key, earphone plugs, encoder/volume, power supply)

Regards and thanks,
A


?
 

I remember reading posts that had the same issue.? It was traced to a clearance issue between the aux board and the v5 board.? When installed the 3.5 mm jack terminal was shorting out.? I would check that.

73
Evan
AC9TU
 

Hello Armando,
if it is an amateurradiokits.in then they do have an issue with the V5 board. I had to grind off the bump in the case ?right underneath the board with the headphone connector so it would not short out the speaker.?
 

I just completed putting a V3 into an amatuerradiokits case with Nextion 2.8 front panel and had this same issue. The problem turned to be the 3 pins that support the volume control connection on the aux board were shorting on the metal left post that supports the front stand on the bottom of the case. To resolve this I located a short little plastic cap and placed over the post which eliminated the short. This is not an issue with the 2 line lcd display as the aux board mounts much higher on the front panel.

Alan
NX4J
 

Thanks Alan, I figured that from another post, unfortunately, I reduced the solders in that area, placed tape over the chassis screw, still have the issue when the board touches the posts. So I replaced them with plastic posts, that solved the lost audio issue but now I have super loud noise, hissing that reduces a bit once I get a signal, but still makes it hard to operate.
Will keep looking :(
A


On Sat, Jan 11, 2020 at 8:00 PM <nx4j@...> wrote:
I just completed putting a V3 into an amatuerradiokits case with Nextion 2.8 front panel and had this same issue. The problem turned to be the 3 pins that support the volume control connection on the aux board were shorting on the metal left post that supports the front stand on the bottom of the case. To resolve this I located a short little plastic cap and placed over the post which eliminated the short. This is not an issue with the 2 line lcd display as the aux board mounts much higher on the front panel.

Alan
NX4J

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