c. Tilting the Seat Up.
(1) You can tilt the seat up from either the doctor's or the assistant's side of
the chair. Zero voltage is applied from the incoming neutral wire to a tie point in the
junction box to one side of the motor. 125v is brought to the other side of the motor
through the black wire to the mode switch. With the switch in the manual position,
power is applied to the tie point in the junction box, along the top wire to the common of
the back adjust switch.
(2) The assistant's and the doctor's seat adjust switches are parallel to each
other. The commons of all four switches are tied together. From the common of the
seat adjust switch, continuity is maintained through the switch to the red wire, pin 3 of
the switch to the junction box. From the tie point in the junction box, power is applied
along the red wire to the "operate up" windings of the seat motor, energizing the motor
and tilting the seat. A screw shaft protrudes from the bottom of the motor. As the motor
turns, the shaft tilts the seat back by turning inside a plastic sleeve.
(3) This mechanical action tilts the seat up or down, depending on the
direction of travel.
d. Tilting the Seat Down. One hundred twenty five voltage is applied to the
junction box, through the mode switch to the common of the seat adjust switch. When
you select down, power is applied out the brown wire from switch pin (1) to the junction
box, along the brown wire to the exit down windings. It energizes the motor and lowers
e. Reclining the Back. Zero voltage is applied to the back adjust motor as it is
applied to the seat adjust motor. One hundred twenty voltabe is applied through the
mode switch to the common of the back adjust switch, pin (2). The switch is pushed to
the back position bringing 120v through switch, pin 3, out the blue wire to the junction
box. Out of the junction box at JP-3 pin 6, power is applied to the back windings. It
energizes the motor and reclines the back.
f. Tilting the Back Up. Power is applied to the common of the back adjust
switch through the junction box and the mode switch. When the switch is depressed to
the forward position, power is applied through switch pin (1), out the white and black
wire to the junction box to the manual up windings. It energizes the motor and brings
the chair forward.