4.4 Hilow Limit Switch
Chapter 4: Removal, Replacement, and Adjustment Procedures
Page 4 - 14 Affinity® Three Birthing Bed and Affinity® Four Birthing Bed
Service Manual (MAN272 REV 4)
d. Use the hilow function to do as follows:
• Non-Stow and Go beds—lower the bed until dimension B is 16"
(406.4 mm) (see figure 4-5 on page 4-12).
• Stow and Go beds—lower the bed until the distance between the
floor and underframe is 3" (76.2 mm) (see figure 4-7 on page 4-15).
e. Using the small screwdriver, turn the screw (D) on the hilow limit
switch (LBD), located on the logic control P.C. board, until the green
light comes on (see figure 4-6 on page 4-13).
f. Continue to adjust the screw clockwise and counterclockwise in small
increments, until an adjustment is attained between the green light
coming on and going off.
g. Using the hilow function, lower and then raise the bed.
h. Check the bed height at the high position. Verify that the distance (A) is
31" ± ½" (787.4 ± 12.7 mm) (see figure 4-5 on page 4-12).
i. Check the bed height at the low position. Verify that dimension B is:
• for Lift-off foot section – 18.5" ± 1/2" (469.9 ± 12.7 mm)
• for Stow and Go® foot section – 19.5" ± 1/2" (495.3 ± 12.7 mm), and
the underbed clearance is at least 3" (76.2 mm).
j. Repeat step a through step i until the high position of the bed is correct.
An adjustment to the hilow limit switch requires verification of the foot limit
switch adjustment.
2. Adjust the foot limit switch adjustment:
• Stow and Go bed—make sure there is a 1" (12.54 mm) gap between
the yoke pin and the ramp guide (see figure 4-5 on page 4-12).
• Non-Stow and Go bed—check the adjustment as instructed in the
section “Foot Limit Switch” on page 4-22.
3. Do the “Function Checks” on page 2-4.
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