Panasonic EP3203-U1 Service Manual page 77

10.10. Adjustment of the Up/down sensor gear
When the Massage mechanism block is removed from the chair, the position of the
Up/down sensor gear changes resulting in a change of the up/down stop position.
When installing the Massage mechanism block on the back frame, be sure to adjust
the position with the Up/down sensor gear.
*Up/down sensor gear position adjustment procedure
To make an adjustment, refer to the Massage mechanism block removing method
(the back frame is tilted from the chair).
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