Hi Rolf,
(Sorry I don't speak G e r m a n) Is this the right place to get technical support for the Jeannie HW synth?
I'm have some issues:
1) I don't measure -8 volts. Are there debug steps or tests points to try? The voltage pump IC is in the socket correctly.
2) I installed firmware V1.1.05.X (from the above message). The T41 orange light dimly blinks one time and then stays full on bright orange. Nothing on the LCD screen except full white. I tested the T41 by uploading "blink" sketch and it works.
Any help would be great.
Thanks,
Steve
Hi Steve ,
we need a liitle more information .
What power supply do you have ?
Than , all Voltages are ok , means 5V , 3,3 V , +8V . This is ok ??
Remove the FX Board . Than test all voltages again .
________________________
-8v isn't there .
How it works . + 12 Volt from the Power supoply goes via D 1 direct to the LT1054. Attention there , are the capacitors 10 u tantal and 100 uF in the right direction ?? If not , the LT 1054 don't work .
On the output pin 5 LT1054 you should have round about 10,5...11. volt . This goes via the L3 to the 79L08 , the negative regulator . Du you have take the L . Resistor and Coil looks simila .
Than, normally the LCD works . There is nothing on active parts between the CPU and the LCD . If the LCD doesn't works it can be that there is a short somewhere or a bad solder point ....
If you had buy a complete kit , i had add the 0,66 Firmware . This i had test with your Teensy and it works . Let me know .
g
Andre'
.
. 
