EP-MA73, EP-MA73KU892 (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 57

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When the Massage mechanism block is removed from the Chair, the position of the Up/down sensor gear changes resulting in the
change of the up/down stop position. When installing the Massage mechanism block on the Rear frame, be sure to adjust the posi-
tion with the Up/down sensor gear.

1. Before removing the Massage mechanism block from the Rear frame, push the button of Off/On on the Controller twice to

move the Massage mechanism block to the lowest position
or use the secret mode (CE) to move the Massage mechanism block to the lowest position.

2. First, remove four screws, which install the Rail piece set left, and remove the Rail piece left.  Then, install the Massage block

jig.
* You can unload the Massage mechanism block without the Massage block jig, which prevents the fall of the Massage mech-
anism block after the Rail piece set right is removed.

3. Remove four screws, which install the Rail piece set right, and remove the Rail piece set right.
4. Remove the Massage mechanism block from the Rear frame.