e. Remove the three screws that secure the control board to the plywood brace.
Grasp the board firmly at the bottom and pull straight down parallel to the plywood
f. Install the replacement control board using the screws that you removed in
step e. above.
g. Push the cords into the sockets in the control board until the locking arms
snap into place.
When connected, the shielded cord should be toward the toe of the chair.
h. Ensure that the toggle switch on the junction box is in the automatic position.
i. Replace the toe board cover.
j. Replace the clear toe cover using the common tacks to secure the tails to the
k. Connect the chair to the power supply.
l. Check the chair to ensure that it operates properly.
REPLACING BASE MOTOR (PLR-200)
The lift motor hums when you use the manual control switch, foot control switch,
or the automatic switch to raise or lower the chair. You have isolated the malfunction to
a faulty base motor. You must remove and replace it. There are different procedures
for the chair in the UP position and DOWN position. If you can raise the chair with the
lift to the UP position, use procedure a. If the chair is in the DOWN position and you
cannot raise it, use procedure b.
a. Chair Is In UP Position. Refer to figure 3-3.
(1) Detach the top bellows by removing the four #10 screws that secure the
bellows to the bellows hanger.
Lower the bellows to the base cover exposing the pantograph.
Place a block of wood, five inches long, between the pantograph arms
on one side and lower the pantograph slightly to grip the block of wood
securely. Refer to figure 3-4.