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.



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. 


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