Analogue-sequencer

Thank you so much colin =)

I will try soon

Mattia Cuttini

2006/4/10, Colin f <colin@colinfraser.com>:
>
>
> > I've powered up only the mainboard
> > but
> > the lcd doesn't write at all
>
> Can you see attempted writes to the LCD ?
> The CPU should be strobing pin 6 of the LCD connector.
> In one case I have seen, the transistor used for Q1 had too little gain to
> drive the LCD enable line.
> You could try a different transistor in there, and/or reduce R20 to 10k.
>
> The bootloader will attempt to write to the LCD display, and if it doesn't
> see a clear 'busy' flag, it wont continue.
> You can fool the CPU into thinking the LCD is responding by removing the
> display module, then wiring pin 14 to pin 1 of the LCD connector.
> That will ensure the CPU thinks 'busy' is always clear.
> If doing that makes it continue booting (you see LED activity), then the
> problem is with the LCD interface.
>
>
> > what is the current consumption of the main board?
>
> About 200mA.
>
> Best regards,
> Colin Fraser
> Sequentix Music Systems Ltd
> http://www.sequentix.com
>
>
>
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