DEC DECtape 551 Manual page 74

APPENDIX1
ENGINEERING DRAWINGS
This appendix contains reduced copies of the block schematics, circuit schematics, and other
engineering drawings necessary for understanding and maintaining this equipment. Only those
drawi ngs wh ic hare essentia I and are not ava i lable in the referenced perti nent documents are
included. Refer to the table of contents for a list of these drawings.
A complete set of engineering drawings is supplied with the equipment. Should any discrepancy
exist between the drawings in this appendix and those supplied, assume that the latter drawings
are
correct~
DRAWING NUMBERS
Engineering drawing numbers contain five items of information, separated by hyphens. This
information consists of a 2-letter code spec Hying the type of drawing, a l-Ietter code spec ify-
ing the size of the drawing, the type number of the equipment, the manufacturing series of the
equipment, and a code specifying the drawing within a particular series. The drawing type
codes are:
BS, block schematic or logic diagram
CD, cable diagram
CS, circuit schematic
FD, flow diagram
I D, interconnection drawi ng
PW, power wiring
RS, replacement schematic
SD, system diagram
TD, tim ing diagram
TFD, timing and flow diagram
UML, uti
Ii
zation modu Ie list
WD, wiring diagram
Al-l