KPG-36X Unknown USB Device (Device Descriptor Request Failed)

[RWilliams500]

I have a Kenwood KPG-36X. It worked the last time I used it, which was a year or so ago. But now plugging it in, Device Manger shows Unknown USB Device (Device Descriptor Request Failed). I've uninstalled the device, the drivers in Add/Remove software. I downloaded new drivers from Kenwood. I downloaded what I THINK is the right generic stuff from Silicon labs. Nothing fixes it. This is a Windows 11 system. Any advice so that I can use my cable and programming software once more would be appreciated.

 

[ramal121]

Is your switch on USB and not UART?

 

[RWilliams500]

Is your switch on USB and not UART?

Yes, it's on USB

 

[n7maq-1]

Yes, it's on USB

Is it plugged into a radio?

 

[ramal121]

If it's not a newer radio like a NX-5000 series it should be on UART.

 

[RWilliams500]

It being plugged in to the radio does not change the device manager error.

It is a nx-5000

 

[AM909]

This seems obvious, but is the radio on?

I think that, with the radios that require the switch to be in the USB position, there is no circuitry required in the cable – the radio is a USB device and the cable just runs the right wires to it from the PC USB jack. This thread talked about that in regards to the KPG-46X (the mobile cable), which I've built and verified to work.

[Add] The KPG-36X manual (RQ070) has the pinouts on page 3.

 

[RWilliams500]

Yes, the radio is on. I don't know anything about the pins. This is an official Kenwood cable. I feel like it might be a driver issue. But I have no idea how to contact Kenwood about this.

 

[jasej]

Hi !

The original Kenwood cable uses the CHIP called CP2102 and until now, it has been enough to read and write NX5000 series devices.

You should not have a problem if you have downloaded the necessary and correct Kenwood drivers for your computer, type of architecture in your operating systems, software and hardware,,,!

Remember, the drivers for the CP2102 CHIP are installed first and then locate the port that was automatically selected and thus, you can work with the original Kenwood cable

Regards

 

[hunterca]

Try uninstalling the driver and then reboot the computer. Then reinstall the driver and try connecting it back to the computer.
You may try to download from the companies website. Maybe there is a new driver for the cable.
Rob

 

[WA0CBW]

It can also mean the port failed. Have you tried using that USB port on anything else?
Bill

 

[RWilliams500]

I have tried every USB port on the computer, no change. I have tried other devices (like keyboard and mouse) in the USB ports, they all work. I have uninstalled the driver, restarted the PC, and reinstalled. No joy. I have installed the drivers from the CD that came with the cable, the drivers downloaded from Kenwoods site, and what I think are generic drivers from Silicon labs. No fix.

In desperation, I brought in a laptop and plugged the cable in after installing the drivers from CD. Worked just fine. So, no idea what conflict is going on in the first computer I'm using, but it looks like it's just something I'll have to accept as never being fixed.