Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this receiver.
Text excerpt from page 152 (click to view)
DP47
EXPLODED VIEW
51/57S715 Drawing 1
NOTE:
Some parts may appear different than those shown in the exploded view. When ordering, refer to the replacement parts list for the correct part number. The circled numbers correspond to the parts list shown on pages 154 and 155. 152