2040-309-002 REV B
73
Service information
Tools Required:
• T27 Torx
• 1/2” Box End Wrench
• #2 Phillips Screwdriver
• Wire Cutters
• Small Flat Blade Screwdriver
• 5/16” Nut Driver
• Multimeter
Procedure:
1. Raise the litter and the head end to the full up position.
2. Remove the head board from the bed.
3. Unplug the power cord from the wall socket and push the battery power On/Off switch to the “Off” position.
4. Using a 5/16” nut driver, remove the screw holding the power cord clamp to the bumper weldment and remove the
clamp from the bumper.
5. Using a T27 Torx, remove the four bolts (A) at the head end of the bed holding the control bar mounting bracket
to the head end (see Figure 1).
6. Using a #2 Phillips screwdriver, remove the three screws (B) holding the control bar cover to the head end of the
bed (see Figure 2).
7. Standing at the head end, pull the control bar toward you and fold down the control bar mounting bracket.
8. Using a 1/2” wrench, remove the nut holding the potentiometer to the mount. Using wire cutters, cut the wire ties.
Unplug the potentiometer cable from the CPU display board and remove the potentiometer.
9. Install the new potentiometer. Using a small flat blade screwdriver, turn the potentiometer shaft clockwise until it
stops. Turn it back counterclockwise 1/2 turn until multimeter reads 2.35 to 2.55 using the black and red wires.
10. After the new potentiometer has been installed, the potentiometer “burn-in” procedure must be performed (see
“Zoom® Option Control Bar Potentiometer ‘Burn-In’ Procedure”).
11. After performing the “burn-in” procedure, reverse steps 1 - 7 to reassemble the bed.
12. Test all functions before returning the unit to service.
Figure 1
Figure 2
Control Bar Potentiometer Replacement
A
B
B
B
Содержание Zoom 2040
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