The PSU (and the PDP11/73 in a BA11) is working again.
After thorough cleaning of the PSU PCB (had to dismount the heatsink and
the 3 TO3's, loosen the TO220's) I'vew checked the semiconductors..ok so far.
Fuse F2 was
blown.
Interestingly the electrolyte of that original Mallory cap seems to
ha
That is a BA11-M box with a H780 supply. The schematics can be found in the
KC780 document since the front end processor of the 11/780 is a PDP-11/03
with a RX01 drive.
In the end of this document there is a schematic:
http://bitsavers.org/pdf/dec/vax/780/MP00534_KC780_Nov77.pdf
Good luck!
/Matt
