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Subject: Re: [yamahacs80] PSU question

From: Csaba Zvekan <czvekan@...>
Date: 2011-03-02

Hi Fernando,

The PSU should and can only be calibrated/troubleshooted under load meaning connected with all other boards. What exactly is your problem ? What voltages do you read ? And compare them with the service manual . If something is off and can not be adjusted we can see further down.

Kind Regards

Csaba


On Mar 2, 2011, at 9:40 AM, Fernando Zarone wrote:

> A question.
> If something is wrong in the PSU of CS-80, how to check why all of the CC voltages are faulty from the origin? Usually one separates the PSU unit from the machine and checks where it is bad. In the service manual (p. 59 if I don't get wrong) it is alerted not to detach the connectors from the PSU, for the risk of damaging the whole.
> So, how to check the PSU unit?
> Moreover, if both two fuses are ok, is there any other component protecting the system ?
>
> Thanks
> Fernando
>
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>
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