PreenFM > preenfm2 and preenfm3

Help request for troubleshouting Preen fm

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Henk vd Broek:
Last weekend i tried build my Preen fm ,and now  i have some problems with my build
and like to have some help with  troubleshouting it
my problem is that my display stays black so i don,t know were to start
I installed the windows driver so the  microcontroller is working
but that,s all i can tell about it
I hope someone can help me with my problem

Xavier:

Hi,

Of course we can help  ;)

First check : the jumpers.
Jmp1 & Jm2 must be ON.
Jmp3 must be OFF.

Then check this thread :
http://ixox.fr/forum/index.php?topic=63470.0
I posted a picture with some point you can check voltage.

Then if no success, post some good quality pictures of the 2 sides of your PCB.

Thanks,

Xavier

Henk vd Broek:
I found the picture ,and measured the points
and it seems that i don,t have 2,5v on pin 16 of both i,c,s
and i can,t measure anything on the resistor 2,5v points
any ideas???

Henk vd Broek:
another picture of my build

funkyfli:
What values do you have at those points?  Are they shorted to ground?

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