Casio CZ/ VZ/ FZ - Pro Series

On Jun 18, 2011, at 7:00 PM, lloydsmith1961 wrote:

> Purchased a nicely looked after CZ5000 from a friend a few months  
> back.
>
> 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.
>
> Is there an internal battery to check, or is this irrelevant?  I  
> want to avoid spending at least what it is worth getting it prof  
> repaired if possible.  Greatly appreciate any help.
>
> Thanks
>
> Tim

From: lloydsmith1961 <timlloydsmith@...>
Subject: [CZsynth] CZ 5000 -  please don't die on me..
To: CZsynth@yahoogroups.com
Date: Saturday, 18 June, 2011, 11:00















 
 



  


    
      
      
      Purchased a nicely looked after CZ5000 from a friend a few months back.

 

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. 



Is there an internal battery to check, or is this irrelevant?  I want to avoid spending at least what it is worth getting it prof repaired if possible.  Greatly appreciate any help.



Thanks



Tim





    
     

    
    


 



  










[Non-text portions of this message have been removed]

>
> 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
>

>
> Have you tried to initialize? There's a button for it. But maybe it  
> will not work if you can't read display.
> 
> Try to remove batteries and then switch on and perform initialization.
> 
> There's no internal battery.
> 
> If it went gradually worse and worse, it can be some contact problem,  
> or transient resistance somewhere. Probably it needs some small  
> maintenance and cleaning inside. I would open it, disconnect all  
> connectors (one by one), clean them with some contact cleaner and  
> connect again. It's good to repeat more times to disconnect and  
> connect the connector for cleaning. And check power supply voltages  
> to be sure this is OK. There are more grounds - digital, DAC, frame  
> and analog...
> 
> If this doesn't help, you have to get it check by professional  
> serviceman.
> 
> If you need Service manual, I found it somewhere on the net and can  
> send you thru some big file sending service (9.6 MB PDF).
> 
> Good luck.
> 
> Daniel Forro
> 
> On Jun 18, 2011, at 7:00 PM, lloydsmith1961 wrote:
> 
> > Purchased a nicely looked after CZ5000 from a friend a few months  
> > back.
> >
> > 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.
> >
> > Is there an internal battery to check, or is this irrelevant?  I  
> > want to avoid spending at least what it is worth getting it prof  
> > repaired if possible.  Greatly appreciate any help.
> >
> > Thanks
> >
> > Tim
>