Synth-DIY Yahoo! Groups Archives

Thread

CMI III Fuses / power indicators

2010-07-02 by arroncx

OK, so i turned my CMI upside down and removed the bottom plate to get to the fuses : Indeed one was blown , marked Audio + 20v. I replaced this one, and the light now comes on at the back of the CMI. This is an improvement:))

Unfortunately, the light marked +5 Digital is still off : I have checked the fuse in this position with a continuity tester, and it is fine.

Does anyone know : 

1) What this fuse actually controls ?
2) If there is any reason it would unlit, even with a good fuse ? 
3) If this is something to do with the monitor, and replaceing the old mono video card with a CG3 ? 

The CMI boots as far as the point where it has finished displaying the Fairlight Logo, then the screen goes  from black to blue, still displaying the fairlight logo, which is a has a few extra corrupt pixels on it.

Thanks,

Arron

Re: CMI III Fuses / power indicators

2010-07-03 by horiprod

Hi Arron.

Very quickly, as I'm just moving "house" in London...

You're 5V supply is obviously working, otherwise you'd have no boot at all... There is no main 5V fuse as such (it'd have to about 30A) however there is a 5V fuse for the analogue side of things, which is on the analogue motherboard. You may have to remove a few modules to find it (near MIDI and router from memory).

Try this and see what happens...

Regards,

Peter Wielk in sunny London.

Show quoted textHide quoted text

> Unfortunately, the light marked +5 Digital is still off : I have checked the fuse in this position with a continuity tester, and it is fine.
> 
> Does anyone know : 
> 
> 1) What this fuse actually controls ?
> 2) If there is any reason it would unlit, even with a good fuse ? 
> 3) If this is something to do with the monitor, and replaceing the old mono video card with a CG3 ? 
> 
> The CMI boots as far as the point where it has finished displaying the Fairlight Logo, then the screen goes  from black to blue, still displaying the fairlight logo, which is a has a few extra corrupt pixels on it.
> 
> Thanks,
> 
> Arron
>

Re: CMI III Fuses / power indicators

2010-07-04 by arroncx

Hi Peter : just a quick note to say thanks : I found and replaced the fuse you mention, and now have all my power indicator lights working : thanks :)

Also good luck moving house.

Best Wishes : Arron

--- In Fairlight-CMI@yahoogroups.com, "horiprod" <horizontal_productions@...> wrote:

Show quoted textHide quoted text

>
> Hi Arron.
> 
> Very quickly, as I'm just moving "house" in London...
> 
> You're 5V supply is obviously working, otherwise you'd have no boot at all... There is no main 5V fuse as such (it'd have to about 30A) however there is a 5V fuse for the analogue side of things, which is on the analogue motherboard. You may have to remove a few modules to find it (near MIDI and router from memory).
> 
> Try this and see what happens...
> 
> Regards,
> 
> Peter Wielk in sunny London.
> 
> 
> > Unfortunately, the light marked +5 Digital is still off : I have checked the fuse in this position with a continuity tester, and it is fine.
> > 
> > Does anyone know : 
> > 
> > 1) What this fuse actually controls ?
> > 2) If there is any reason it would unlit, even with a good fuse ? 
> > 3) If this is something to do with the monitor, and replaceing the old mono video card with a CG3 ? 
> > 
> > The CMI boots as far as the point where it has finished displaying the Fairlight Logo, then the screen goes  from black to blue, still displaying the fairlight logo, which is a has a few extra corrupt pixels on it.
> > 
> > Thanks,
> > 
> > Arron
> >
>