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Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Message

Re: Yamaha TG33 power supply

2010-02-25 by Royce

Thanks Brian.
What a great scan. I wish I could get my ccts to scan that well.

Looks like there is a 5V reg for the digital and the full voltage is sent to power some OpAmps 
As well there is a split off regulated with a 9.1V 1A zenner but most of the load is passed through a transistor. I assume it is on a heat sink.

Did I miss anything?

So 12V should be OK.

Thanks again
Royce


--- In vintagesynthrepair@yahoogroups.com, "Brian" <brian@...> wrote:
>
> I can offer you a copy of the whole cct, however you should be OK with 12V
> but you may want to check the operating temperatures of the regulator ccts.
> 
>  
> 
> If the Yahoo system removes the attachment contact me off list.
> 
>  
> 
> Regards
> 
> Brian G3OYU
>

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