Check the mains filter x2 capacitor.
Sent from my iPad
On 13 May 2018, at 3:51 pm, Waldemar Brodkorb via
cctech <cctech at classiccmp.org> wrote:
Hi,
I started to revive an old Micro PDP11/83 I have for over 12 years
now. It is fully assembled and last time I tried to start the
machine it some kind of started.
My biggest issue at the moment is the power supply.
After the machine is running for a while, let's say 10 minutes and
then when I poweroff, the power supply starts producing a lot of
dense smoke. The smell is very penetrant.
What can I do with the power supply? Do I need to exchange it
completely or just parts of it?
At the moment I removed it from the case like described here:
http://www.bitsavers.org/pdf/dec/pdp11/microPDP11/EK-MIC11-TM-002_MicroPDP1…
Thanks in advance for any starting hints,
Waldemar