Sony CDX-715 Service Manual page 13

OPERATION CHECK
1 Confirm that the slider moves in direction C to move down the
chuck plate if the gear (LOAD 1) is rotated in direction A or the
chuck plate moves up and the slider moves in direction D if the
gear is rotated in direction B .
slider
chuck plate
D
A
B
gear (LOAD 1) ass'y
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C