[SOLVED]Bad power supply with high voltage.

[kroutshev]

Hi Xavier,
 ok i have tested this "By pressing and holding INST+one of the left buttons", only "plop" and absolutly no FM sound ... here the picture of what we can see on the screen when i hold INST and left button :

[kroutshev]

And for the spacer for the screen you can view the photo :
It's very nice from you to propose a screen, in regard of previous picture it seems that mine is out of order.
About MCU how can i know if it's ok ?
Thanks again Xavier.

[Xavier]

I've just PMed you.

[kroutshev]

Ok Xavier, with your new lcd it's better but now the problem is with my usb key. I have to find another one because the new one that i use is no compatible !!
The cer40 is in good state and don't need to be replaced.
But however i will pay the one that y have sent me in case of future problem.
Thanks again for your precious help !

[Xavier]

Ok Xavier, with your new lcd it's better but now the problem is with my usb key. I have to find another one because the new one that i use is no compatible !!
The cer40 is in good state and don't need to be replaced.
But however i will pay the one that y have sent me in case of future problem.
Thanks again for your precious help !

So if that's the LCD only, i don't understand why you didn't get any sound.
Are you DAC workging ? Do you have sound now ?

[kroutshev]

If my usb key is dead, i can have sound ?

[Xavier]

If my usb key is dead, i can have sound ?

If you're USB Key is dead, the preenfm2 freezes with its display full of yellow squares.
If you can boot and don't get any sound, you may have damaged your mcp4922.

[kroutshev]

achhhhhhh, in that case ... it seems that the mcp is dead too ... 
i have to managed to find another one ...
Maybe other parts are dead too ...

[Xavier]

I'm not surprised the DACs are powered by the 5V.
I can ship you 2 mcp4922 DACs...

Can you confirm midi work ?
Midi over DIN5.
To Confirm your 6N137 octocopler work.
A note is blinking on the display when it receives midi note on.

[kroutshev]

Hi Xavier,
 i will test midi tonight, about DAC shipping, i think that i've got some of them in my stock ...
I will confirm you when i'll have checked at home.
Thanks again for your help !!

[kroutshev]

Hi Xavier,
 my preenfm2 is reborn :-). I have received my new usb key and he has refound his voice !!
The DAC's were ok, no replacement needed !
Thanks a lot for you help !

[Xavier]

Good news 
Thanks for the update.