[Test-Equipment] Scope info needed

[jbarnes]

All the 7603s that I have worked on have linear power supplies.

It is the larger members of the 7000 series scopes that have the switchers.

Check the power supply rails for short circuits.

Try operating the unit with 1 or 2 plugins. The power supply short could be in a plugin.

I have also seen ceramic capacitors go short taking down the rails.

Do you have access to a manual ??

Sincere regards,

John Barnes
73 de VE3XRY

---------- Original Message ----------------------------------
From: "J. Forster" <jfor at quik.com>
Reply-To: jfor at quik.com
Date:  Fri, 18 Mar 2005 17:14:10 -0500

>Agreed on both points. The little dipped tantalums are a problem.
>
>If the power supply is damaged, it can be hard to fix. It's pretty complicated
>in the inverter section. There are several internal fuses as I remember that are
>worth checking first.
>
>BTW, this is an off-the-line switcher. USE AN ISOLATION TRANSFORMER.
>-John
>
 




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