Here are some docs that might be helpful if you haven't already found these:
http://www.bitsavers.org/pdf/dec/vax/655/EK-306A-MG-001_655Mnt_Mar89.pdf KA655 CPU System Maintenance Order Number EK-306AA-MG-001 http://www.bitsavers.org/pdf/dec/vax/655/EK-KA655-TM-001_KA655_CPU_Module_Technical_Manual_Jan89.pdf KA655 CPU Module Technical Manual Order Number EK-KA655-TM-001 http://bitsavers.trailing-edge.com/scandocs.trailing-edge.com/micropdp11-volume_2_enclosures-EK-189AA-MG-001.pdf BA213 Enclosure Maintenance Order Number EK-189AA-MG-001
