28EX-009-002 REV B
1-49
En
gli
sh
CONTROL BOARD REPLACEMENT
Tools Required:
•
#2 Phillips Screwdriver
•
#3 Phillips Screwdriver
•
Needle Nose Pliers
•
Cutting Pliers
•
3/8” Combination Wrench
Procedure:
1 . Raise the bed to the highest position and apply the brakes .
2 . Unplug the bed from the wall outlet .
3 . Remove the foot board .
4 . Using a #3 Phillips screwdriver, remove the six screws (A) holding the plastic cover to the foot end casing . Grasp
both ends of the cover, move them apart to disengage the inside clips from the round accessory brackets and
remove the cover .
5 . Using a #2 Phillips screwdriver, remove the four screws (B) holding the protective plate to the foot end casing .
6 . Properly ground yourself (see “Grounding Diagram”,
) .
7 . Using cutting pliers, cut the cable ties holding together the cables .
Note
•
Carefully note the position and the grouping of the cables before clipping the cable ties .
•
Ensure Dip Switch settings of the new control board match the ones on the old board .
8 . Remove the jumper from W1 on the control board and install it on the new board .
9 . Remove all cables connected to the control board . Note their location so they will be connected properly to the
new board . Refer to drawing OL280118,
, for the connecting position of the
cables on the motor control board .
10 . Using a 3/8” combination wrench, remove the nut/screw (C) holding the ground cable to the frame .
11 . Using needle nose pliers, pinch the upper part of the stand-off pins and lift the defective board up and out .
12 . Using a 3/8” wrench and a #2 Phillips screwdriver, remove the nut/screw (D) holding the ground cables to the
board .
13 . Reverse the above steps to install the new control board .
14 . Test all the bed functions before returning the bed to service .
A
B
C
C
D
Figure 11
Service Information
Summary of Contents for FL28EX
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