[sdiy] location for 5v in casio cz101 - backlit lcd installation

[Adam Inglis]

I've often wanted to do something like that to my CZs.

FWIW I've run my two 101s from unregulated supplies (nominally 9  
volts - but usually more or less by a volt or two when measured at  
the CZs input) rated at 500mA. The machines stated consumption is 5.4  
watts.

T4s collector sees the supply voltage. It appears to be the main  
regulator - I think the others are for the headphone amp and the auto- 
power-off circuit. Vdd is at the emitter (mine measures 4.87v, with  
7.9v on the collector - it seems to be fairly tolerant of undervoltage).

I can't see if there is any provision for overvoltage protection. I  
do know from experience it is tolerant of reverse polarity briefly!

Do you know how much current your mod will draw? Are there details  
online? It's a fairly tight space in there...

cheers
Adam




regards
Adam Inglis
http://www.adambaby.com

On 13/07/2011, at 7:59 AM, Travis Thatcher wrote:

> I'm working on installing a Sparkfun backlit LCD in a CZ101.  Looking
> at the schematics it appears that pin 3 of T4 should be the collector
> and should be outputting VDD which I assume is 5v for all the cmos
> logic chips. Can anyone confirm these assumptions? Also, I don't have
> any 9v supplies with enough current lying around, is the cz101 power
> circuit sufficiently designed to not die if I run it off of 12v?
> Sorry if these seem like dumb questions, I've been searching the web
> and as this isn't my synth, I don't really want to go the trial and
> error route.
>
> Thanks!
> Travis
>
> -- 
> http://www.travisthatcher.com
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