On Fri, Jan 5, 2024 at 10:06 AM, K9NUD-Steve wrote:

Juan, estoy bien!

El modo IQ redirige el audio a la tarjeta de sonido USB incorporada. Un día habilité el mío y perdí todo el audio del conector del altavoz. Vaya a los menús hasta llegar al menú Configuración del sistema. Desde allí, verá una configuración llamada "Modo IQ". Asegúrese de que esté configurado en DESHABILITADO.

Thank you very much Steve.

Juan, I am well!

IQ mode reroutes the audio to the built-in USB sound card. I enabled mine one day and lost all audio from the speaker jack. Go through the menus until you get to the System Config menu. From there, you will see a setting called "IQ Mode". Make sure it is set to DISABLED.
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72/73 de Steve, K9NUD

On Thu, Jan 4, 2024 at 09:44 AM, K9NUD-Steve wrote:

This can happen if you enable IQ mode. Make sure it's disabled in the System Config menu.

Hello Steve, how are you?
What is de IQ mode??What is de IQ mode? Where is it deactivated from?
Thank you
73, Juan LU9CYV

On Tue, Jan 2, 2024 at 05:39 PM, Juan wrote:

Thanks for your responses Ron and Evan. I did what Ron told me to do and I also did the factory reset but the volume control still doesn't work, that is, I can't raise or lower the volume from the volume knob.
73, Juan LU9CYV

?This can happen if you enable IQ mode. Make sure it's disabled in the System Config menu.
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72/73 de Steve, K9NUD

Mine does that every now and then. A quick power-cycle fixes it. Another bug, I reckon. I haven't replicated it enough to report it.
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72/73 de Steve, K9NUD

On Wed, Jan 3, 2024 at 07:55 PM, Daniel Walter wrote:

Yes, very wrong. The left (volume) encoder is definitely not working correctly. A bad encoder is one possibility, but a bad solder connection is more likely. Now you have to trace the circuit from the encoder lines back to the main PCB to find out where it is not connecting. Highest probability is right where the encoder wires are soldered to the control sub assembly PCB. Other possibilities are a bad solder connection of the male and female pin connectors between the two boards. If you find no discontinuity, then a bad encoder is possible.

Good luck tracing it! Hopefully it is something simple.

Thank very much Dan!
73, LU9CYV

Juan,

Yes, very wrong. The left (volume) encoder is definitely not working correctly. A bad encoder is one possibility, but a bad solder connection is more likely. Now you have to trace the circuit from the encoder lines back to the main PCB to find out where it is not connecting. Highest probability is right where the encoder wires are soldered to the control sub assembly PCB. Other possibilities are a bad solder connection of the male and female pin connectors between the two boards. If you find no discontinuity, then a bad encoder is possible.

Good luck tracing it! Hopefully it is something simple.

--
73, Dan? NM3A
There are moments when everything turns out right .... Don't let them alarm you; they pass.?

-Jules Renard

Thank you very much Evan!
I'll see how I solve this problem.
I will try to contact Hans to see what solution he gives me.
Then I tell you
73, Juan LU9CYV

Juan,

The screen and test show a problem with the left encoder.? That could be a connection, a solder joint, or a bad encoder.

I suggest contacting QRP-Labs support to see if they can send another encoder.? I again urge you to find a local Ham who can help with the diagnostic and repair.? You must take apart the QMX, desolder the old part, and solder in the new part.? It is also a good idea to visually inspect all the connections to the control board.

73
Evan
AC9TU

It sounds as if the left encoder is not working properly. Check on the terminal diagnostics screen. there are a number of RED items. when you successfully exercise each of these items, the RED will go away. A strong suspect is that the left (volume) encoder is not responding to clockwise turning. This might be a bad connection from the encoder to the encoder sub assembly or a bad connection from the sub assembly to the main board. If you can check the continuity of those paths, you might find the issue.?

Or you can just PM Hans and see what he can do for you.
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73, Dan? NM3A
There are moments when everything turns out right .... Don't let them alarm you; they pass.?

-Jules Renard

开云体育

You might also use the terminal mode to run the diagnostic to be sure that the encoder and all are working... That's all described in the assembly manual.

Also, when you power on, is it showing you version 14?

Paul -- AI7JR

Juan,

Maybe the issue is the earphone jack?? Can you try connecting a speaker to the board connections of the jack?? The other possibility is the audio amplifier has failed.? Do you have a way to connect an earphone to the output of either C420 or C421?

73
Evan
AC9TU

-- 
Paul -- AI7JR

Juan,

Maybe the issue is the earphone jack?? Can you try connecting a speaker to the board connections of the jack?? The other possibility is the audio amplifier has failed.? Do you have a way to connect an earphone to the output of either C420 or C421?

73
Evan
AC9TU

Thanks for your responses Ron and Evan. I did what Ron told me to do and I also did the factory reset but the volume control still doesn't work, that is, I can't raise or lower the volume from the volume knob.
73, Juan LU9CYV

Juan,

Did you do the factory reset?

73
Evan
AC9TU

I was able to update the firmware to the latest version, but the volume control still does not work
73, Juan LU9CYV

Yes, The QMX can not get power from the USB cable.? It needs a separate power supply.? This is best done for the first time with a current and voltage controlled supply, starting at 6.5 to 7 volts, limited 250ma.? A power cycle is needed whenever the USB cable is disconnected from the PC.? The QMX does not always let the PC know how to connect.

73
Evan
AC9TU