Check the mains filter x2 capacitor. Sent from my iPad
> On 13 May 2018, at 3:51 pm, Waldemar Brodkorb via cctech > <cct...@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_MicroPDP11_Systems_Technical_Manual_Sep85.pdf > > Thanks in advance for any starting hints, > Waldemar
