Casio CZ/ VZ/ FZ - Pro Series

  ----- Original Message ----- 
  From: rabies _ 
  To: CZsynth@yahoogroups.com 
  Sent: Wednesday, August 04, 2010 3:52 AM
  Subject: [CZsynth] clicking sound


    
  hi,

  i had my cz1000 for two decades now and still works really fine.
  but lately i've been hearing this clicking sound inside, near the power and audio output side.

  it's not really affecting the functions of the synth but i'm 'kinda worried that it might in the long run. every time the clicking starts, it produces minute interference that i could hear from the headphones.

  i'm using a regulated power supply (purely 9 volts at 1000ma) so i don't think the power supply is the problem. even tried other regulated 9v psu just in case. i often make sure that power fed in all my equipment are accurate.

  i know a bit of electronic trouble shooting, so i opened the synth to peek inside and found the culprit - this black square component (which i forgot the actual name for it; though i think it's a regulator or something) located near the transistor with a heatsink, was the one causing the clicks. 

  since i know only the basics in electronics, i only tried to see if there was grounding, and i far as i know, i found none. 

  anyone hear have a similar problem?

  any solution or cure for this?

  thanks.



  


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>
> sounds like a dry joint just reflow the solder on the pins of the regulator first and see if the clicking stops if not then the regulator is on its way out
> 
> only a couple of quid to buy 
>   ----- Original Message ----- 
>   From: rabies _ 
>   To: CZsynth@yahoogroups.com 
>   Sent: Wednesday, August 04, 2010 3:52 AM
>   Subject: [CZsynth] clicking sound
> 
> 
>     
>   hi,
> 
>   i had my cz1000 for two decades now and still works really fine.
>   but lately i've been hearing this clicking sound inside, near the power and audio output side.
> 
>   it's not really affecting the functions of the synth but i'm 'kinda worried that it might in the long run. every time the clicking starts, it produces minute interference that i could hear from the headphones.
> 
>   i'm using a regulated power supply (purely 9 volts at 1000ma) so i don't think the power supply is the problem. even tried other regulated 9v psu just in case. i often make sure that power fed in all my equipment are accurate.
> 
>   i know a bit of electronic trouble shooting, so i opened the synth to peek inside and found the culprit - this black square component (which i forgot the actual name for it; though i think it's a regulator or something) located near the transistor with a heatsink, was the one causing the clicks. 
> 
>   since i know only the basics in electronics, i only tried to see if there was grounding, and i far as i know, i found none. 
> 
>   anyone hear have a similar problem?
> 
>   any solution or cure for this?
> 
>   thanks.
> 
> 
> 
>   
> 
> 
> ------------------------------------------------------------------------------
> 
> 
> 
>   No virus found in this incoming message.
>   Checked by AVG - www.avg.com 
>   Version: 8.5.441 / Virus Database: 271.1.1/3049 - Release Date: 08/03/10 14:22:00
> 
> 
> [Non-text portions of this message have been removed]
>

>
> I think you have a relay going bad. There is a relay that keeps the 
> audio output shut off while the CZ is powering on so as to prevent power 
> supply surges going to the output during power up. These relays do go 
> bad, and I had to replace mine. The good news is that they are cheap ( 
> $5 or 6 ) and still available at real electronics parts supply houses 
> (not Radio Shack). I used a NTE Electronics R40-11D2-5  (a 5 volt relay) 
> to replace the OMRON G2VN-237PL on my CZ-1.
> 
> Hope this info helps.
> 
> Gary
>

  ----- Original Message ----- 
  From: rabies _ 
  To: CZsynth@yahoogroups.com 
  Sent: Thursday, August 05, 2010 9:00 AM
  Subject: [CZsynth] Re:clicking sound


    
  yes gary, you are correct.

  mine is an Omron G2E-187P -H-B 5VDC. and when i 'googled' it i already found out it's exactly what you say, a relay.

  i was just about to ask it here what it does to the synth, and your info is more than enough. thanks!

  btw, i already took out the relay to look for a spare part. 

  although, when i 'googled' its availability, many of the searches that came out says 9vDC not 5vdc. will it make a difference?

  i'll try to go the electronics hub in our city (manila) this weekend and try to look for it. i just hope there's one for me out there.

  also, without the relay in the synth, will the synth still work? i'm using a regulated power supply that exactly put out 9volts at 1000ma.

  sorry for so many questions. but your info is very accurate to the solution for my cz1000 problem.

  again, thanks so much!!

  --- In CZsynth@yahoogroups.com, "Gary H. Dunford" <garyd@...> wrote:
  >
  > I think you have a relay going bad. There is a relay that keeps the 
  > audio output shut off while the CZ is powering on so as to prevent power 
  > supply surges going to the output during power up. These relays do go 
  > bad, and I had to replace mine. The good news is that they are cheap ( 
  > $5 or 6 ) and still available at real electronics parts supply houses 
  > (not Radio Shack). I used a NTE Electronics R40-11D2-5 (a 5 volt relay) 
  > to replace the OMRON G2VN-237PL on my CZ-1.
  > 
  > Hope this info helps.
  > 
  > Gary
  >



  


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  ----- Original Message ----- 
  From: Gary H. Dunford 
  To: CZsynth@yahoogroups.com 
  Sent: Friday, August 06, 2010 4:51 PM
  Subject: [CZsynth] Re:clicking sound


    
  No, the CZ will not have an output without the relay. However, if you 
  really know what you are doing, you can bypass the relay circuit by 
  removing the relay and placing jumpers across the relay output contacts 
  on the board. It is very easy if you can solder. You will need a CZ 
  schematic to do this if you are unsure which contacts on the relay are 
  the outputs. If you do this, be sure to turn on your CZ before turning 
  up you mixer or amplifier volume to prevent power pops. Schematics are 
  available online and some are even available in the Yahoo group. Best 
  to replace the relay. 5vdc relay will work.

  Gary



  


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  Version: 8.5.441 / Virus Database: 271.1.1/3054 - Release Date: 08/06/10 07:37:00


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>
> these relays are also used in yamaha keyboards sy22 sy35 and other models there there for anti thud protection you can by pass them by just linking the audio outs across the relay 
> 
> and just turn the fader down on the mixer when switching on its there so the thud does not damage your speakers as there is a large transient when switched on  which the relay circuit kicks in after 
> 
> the transient has finished 
>   ----- Original Message ----- 
>   From: Gary H. Dunford 
>   To: CZsynth@yahoogroups.com 
>   Sent: Friday, August 06, 2010 4:51 PM
>   Subject: [CZsynth] Re:clicking sound
> 
> 
>     
>   No, the CZ will not have an output without the relay. However, if you 
>   really know what you are doing, you can bypass the relay circuit by 
>   removing the relay and placing jumpers across the relay output contacts 
>   on the board. It is very easy if you can solder. You will need a CZ 
>   schematic to do this if you are unsure which contacts on the relay are 
>   the outputs. If you do this, be sure to turn on your CZ before turning 
>   up you mixer or amplifier volume to prevent power pops. Schematics are 
>   available online and some are even available in the Yahoo group. Best 
>   to replace the relay. 5vdc relay will work.
> 
>   Gary
> 
> 
> 
>   
> 
> 
> ------------------------------------------------------------------------------
> 
> 
> 
>   No virus found in this incoming message.
>   Checked by AVG - www.avg.com 
>   Version: 8.5.441 / Virus Database: 271.1.1/3054 - Release Date: 08/06/10 07:37:00
> 
> 
> [Non-text portions of this message have been removed]
>