4.21 Logic Control P.C. Board Assembly
Chapter 4: Procedures
4 - 36 Affinity® Four Birthing Bed Service Manual (195826 REV 2)
4.21 Logic Control P.C. Board Assembly
Tools: Needle nose pliers Isopropyl alcohol
The voltage in the electrical system presents an electrical shock hazard. Do standard electrical service
procedures before attempting service within the P.C. board enclosure. Follow all electrical safety
precautions when servicing the bed’s electrical system. Failure to do so could cause personal injury or
equipment damage.
REMOVAL
1. Set the brake/steer pedal to the brake position.
2. Make sure the bed is out of the Trend-Like position.
3. Raise the bed to the high position. If the hilow function is inoperable, skip this step.
4. Raise the head section to the high position. If the head function is inoperable, activate the CPR
release and manually raise the head section.
Failure to unplug the bed could cause injury or equipment damage.
5. Unplug the bed from its power source.
6. Put the siderail lockout switch at the head end of the bed in the locked position.
7. Remove the top motor cover (see Procedure 4.1 on page 4-3).
8. Identify and disconnect the wiring connectors from the logic control P.C. board (A), beginning with
the battery cable connection P5 (see
Figure 4-24 on page 4-37 and Figure 4-25 on page 4-38).
To prevent component damage, make sure your hands are clean, and only handle a P.C. board by its
edges. Failure to do so could cause equipment damage.
9. Use the needle nose pliers to compress the locking tabs on the five logic control P.C. board
mounting standoffs (B), and apply slight upward pressure on the logic control P.C. board (A) to
disengage the locking tab on each mounting standoff.
For shipping and storage, put the removed P.C. board in an antistatic protective bag. Failure to do so
could cause equipment damage.
10. Handle the logic control P.C. board (A) by its edges with clean hands, remove it from the electronics
plate weldment (C).
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