Emax

I just fixed a DX7II-FD main board for Jon Morgan. Same symptoms floppy drive errors then all of a sudden it would not boot anymore. The floppy disk controller chip was bad. If you can find a WD1772PH controller chip (Ebay) try it and you may be back in business. This FDC chip can interrupt the CPU and prevent it from booting.

--- In emax@yahoogroups.com, krikor kouchian <krikorola@...> wrote:
>
> from what i read in the service manual, Cheju is right, it could be either
> the CPU, the Echip/MCL, or the timer.
> But the fact that the LED and display go crazy is directly related to the
> main CPU, from the block diagram info.
> 
> Can this part be replaced? i have the feeling it can't
> 
> http://www.krikor.fr
> +33632199413
> 
> bookings:
> France/Suisse/Benelux: fanyktdj@...
> World: laetitia@...
> 
> 
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