Re: 2nd QMX Build and it wont power on and an update on my old unit...
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Hello Devan
There's only one ADC on the main board which is the PCM1804. But I'd suggest first checking what you see on the RF sweeps (apologies if you've already posted that here, too many topics to follow).?
On Wed, Aug 30, 2023 at 5:46?PM Devan Phillis < devan@...> wrote: Good morning,
I have received and built my second QMX according to the current build guide, and cannot get it to power on. I built it for 12v operation and I tried starting at 7v and then up to 10v (painful past experience). I know the screen will be blank and off until the FW is loaded. The unit does not even power on enough to be recognized as a USB device. I tried reflowing all of my connections on the main board as well as the connections on the buck converter boards and I even reflowed the USB port.?
My first QMX had a bad day from the word go (fed with almost 14v by accident), and it will power on now after many repairs and much troubleshooting, but has no RX, I believe I may have fried one or more of the of the a/d converters on the main board but I do not know what part to replace them with, there are too many options. Maybe Hans can speak to that?
Thanks,
Devan KD8MST
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