Casio CZ/ VZ/ FZ - Pro Series

OK, so not Cmos. All, I know, and this has happened a LOT, is by turning on for a couple hours each day, they all have come back to life. I was all set to send a synth back to Wine Country for repair, but it woke up just before I boxed it.
Rig
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On Fri, 7/15/16, Daniel Forró danforcz@... [CZsynth] <CZsynth@yahoogroups.com> wrote:

 Subject: Re: [CZsynth] CZ1 keyboard issue
 To: CZsynth@yahoogroups.com
 Date: Friday, July 15, 2016, 5:34 PM
 
 
  
 
 
 
   
 
 
     
       
       
       I don't think this can be caused by CMOS
 chips.
 
 
 
 Bigger problems with long time sleeping instruments can be
 caused by  
 
 old capacitors, mainly electrolytic ones.
 
 
 
 Repeating switching on/off can't help so much, important
 on it is the  
 
 phase when machine is on. Because it was enough time off
 :-)
 
 
 
 So what can help is to leave the machine on for longer time,
 but to  
 
 watch it (danger of the fire!).
 
 
 
 And the best is to check all caps and maybe change
 electrolytic caps  
 
 looking suspiciously in PSU (or elsewhere in the
 circuits).
 
 
 
 When PSU delivers stable voltages properly on spec, it's
 time to check  
 
 all the other things - first all connectors and chips in
 sockets, as  
 
 this is where oxidation can cause bad contact. Clean,
 de-oxit, reseat  
 
 more times...
 
 
 
 If this all doesn't help to revive the machine, it's
 necessary to do  
 
 other checking and  diagnostics, and maybe replace more
 components.
 
 
 
 Problems can be also solved by changing RAM backup battery
 (and  
 
 leaving the machine without battery for 24 hours), by
 factory reset,  
 
 by loading good set of sounds, and of course by using the
 machine (for  
 
 example problematic microswitches can return  to normal
 operation when  
 
 used for some time - something like self-cleaning).
 
 
 
 Just my experience from reviving of many old machines.
 It's not rocket  
 
 science.
 
 
 
 Daniel Forro
 
 
 
 On Jul 16, 2016, at 9:18 AM, bill bigrig
 billbigrig@...  
 
 [CZsynth] wrote:
 
 
 
 > I'm going to go out on a limb here, I've had
 Sequential Circuits,  
 
 > Yamaha Cx5 muzik computer and yes, CZ act weird on me
 after long  
 
 > rests in a closet etc. They act REALLY weird on power
 up. I turn  
 
 > them off for a day, then back on. Repeating this brings
 them back a  
 
 > little bit at a time. The only thing I can think of is
 the Cmos  
 
 > electronics of this era wakes up slowly. It has
 happened to me MANY  
 
 > times. You may want to try it.
 
 
 
 
 
     
      
 
     
     
 
 
 
 #yiv5787141714 #yiv5787141714 --