[rescue] Sparcstation Voyager

[Andy Piercy]

This fault is usually due to the surface mount electrolytic capacitors on
the DC/DC converter.
I would recommend changing them all.
This usually fixes all the supply rails.

Thanks,

Andy.

On Tue, 23 Nov 2021 at 17:43, HHA <haderer.heinz at gmail.com> wrote:

> Dear all,
>
> some time ago I got a defect Sparcstation Voyager, which I want to try
> to revive now.
>
> Main faults are:
>
> - Faulty internal DC converter: 3.3 V and 12 V outputs seems to be
> stable, but the 5V voltage is rising slowly after power-on until the
> sparcstation is shut off (by an internal overvoltage protection ?) when
> the output voltage is coming near 6V. Maybe its a defectB  electrolytic
> capacitor, but it is hard to debug without a schematic.
>
> Does anybody have a schematic for the 40W DC-DC converter (Sun P/N
> 300-1234 == FDK CEX165-00) ?
>
> - The LCD display (Colour TFT) is looking dead, does not show anything;
> at least the banner and some error messages should appear.
>
> Does anybody own anyB  docs about the LCD's internal structure ? Are
> there any fuses (and where ?), which should protect the LCD?
>
> Many thanks for helpful replies,
>
> Heinz Haderer
>
> haderer.heinz at gmail.com
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue