Analogue-sequencer

Nope, no logic probe..  Ive got my meter.. and an old scope.  
Any other way to check?
Could I rig up a logic probe w/ parts??

~Steve




--- In analogue-sequencer@yahoogroups.com, "Colin Fraser" 
<colin@...> wrote:
>
>  
> >  Colin, the sequencer works, its just that the display never 
comes 
> > on.  LED's work and it spits out MIDI, but no cool green !
> 
> For the sequencer to work without the display coming on, the CPU 
interface
> on the PLED module must be working, but there is a problem on the 
module
> driving the display.
> The intermittent non-booting CPU may also be caused by the PLED 
module - if
> it doesn't repsond to the CPU interface.
> Both could be symptoms of a failed PLED module.
> Another possibility is that if the 74245 bus driver that handles 
the PLED
> interface is gone, it might have failed in a way that breaks the 
link to the
> PLED display, but makes the CPU think it's OK.
> You got a logic probe ?
> 
> Best regards,
> Colin Fraser
> Sequentix Music Systems Ltd
> http://www.sequentix.com
>