The plate at the very top of this assembly is +5V distribution. The smaller plate just below and left of it is the O/C Sense Plate. Pins on middle DC panel: +5 VDC Feature PS B +12VDC Feature PS A +12VDC Feature PS A (Or regulator) ditto -4VDC base -4vdc base +6vdc base -5vdc base ditto ditto +8.5 vdc base ditto +24VDC base ditto -24VDC base The bottom panel is the Feature Distribution Assembly Pins: +5VDC Feature PS C ditto +8.5VDC +12VDC -5VDC -12VDC +5VDC Feature PS D ditto There! This came from the IBM System/34 5340 System Unit Maintenance Manual. (SY31-0457-5) -------