Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this receiver.
Text excerpt from page 22 (click to view)
HELP 2: SPEAKER HARNESS
Speaker Harness
Claw
HELP 3: PRECAUTION WHEN INSTALLING THE CABINET L ASSY FOR SERVICE
Cabinet L assy for service D lid block Screws When the eject block is installed on the cabinet L assy for service, a discrepancy could be made between the cabinet D block and the D lid block, and as a result, the D lid may not to be closed. In case of such discrepancy, loosen the screws on the hinge to eliminate the discrepancy of the D lid block, and then retighten the screws.