Casio CZ/ VZ/ FZ - Pro Series

Ok, have an electronics engineer mate going to take a look, will pass your suggestion on.  Interestingly if left long enough it does eventually go on, & once warm will switch off & on immediately.  However, after I got an electric  shock of the rear of the casing I thought better of using it until checked. Thanks for your help Gordon. 

Tim



--- In CZsynth@yahoogroups.com, Gordon JC Pearce <gordon@...> wrote:
>
> On Sat, 2011-06-18 at 10:00 +0000, lloydsmith1961 wrote:
> 
> >  
> > It has gradually become slower & slower to switch on. The display
> > shows a line of boxes & then after a while there's the click &
> > characters/sounds appear. This  delay was initially intermittent -
> > sometimes it would switch straight on.  Last night (isn't it always
> > the way) about to use it for a studio project to find it wouldn't get
> > beyond the grey box stage - no click, no characters, no sound & no
> > buttons operational.  Have checked/tested the 3 AAA batteries which
> > are all good. 
> 
> Sounds like a problem around the power-up reset circuitry.  I'm not sure
> if there's a circuit diagram floating about but somewhere in there you
> should find a resistor to +5V and a capacitor to ground.  As the
> capacitor charges the reset pin goes from 0V to 5V.  Check for spillage
> on the board around there, or signs of distress from the capacitor.
> 
> Note that this does not mean "blindly replace every capacitor you can
> see in the hope this makes a vague problem go away".  That's the reason
> I've had to scrap several synths people have brought round to get
> fixed...
> 
> Gordon MM0YEQ
>