Re: 9825A Troubleshooting #VintageHPComputers #HP9825


Paul Berger
 


On 2021-03-02 3:13 p.m., Rik Bos wrote:
By head I say it's the AC return line to the transformer.
So it seems your very lucky.

-Rik

_._,_._,_

The trace that burned some of the solder mask off is the leg of the transformer feeding the +20 unregulated.  I am surprised it did not blow the fuse before doing that damage, maybe there is a nail in the fuse-holder.  I have had two power supplies fail one in a 9825 and one in a 9835  and neither one suffered that kind of damage. 

Paul.

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