Chamberlain 041C4672 Handleiding

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To avoid SERIOUS INJURY or DEATH from electrocution,

disconnect power to opener BEFORE proceeding.

RPM SENSOR 41C4672

Replacement Instructions

You will need a 1/4" magnetic nut driver and

long-nosed pliers.

1.Disconnect power to the opener.

2.Remove the opener lens (refer to your owner’s manual).

3.Remove the cover:

•Using a 1/4" magnetic nut driver, remove the two

screws recessed in the bottom of the cover.

•Unplug the wires to the light sockets inside, and place

the cover aside.

4.Lift off the Control Center access door and set aside.

5.Unfasten the receiver logic board assembly from the

chassis by removing the two screws inside the panel

under the top edges (a). Allow it to hang suspended by

wires.

6.Disengage the limit switch assembly from the(b)

retention slots in the limit switch bracket (c) by

squeezing the top and bottom on the right near the drive

gear (see illustration).

7.Disengage the hook on the left and allow assembly(d)

to hang by wires.

8.Remove the screw at the top rear of the limit switch

bracket where it fastens to the chassis.

9.Tilt the bracket upwards to disengage its two hooks

from slots in the chassis, and allow it to hang.

10.Remove the worm gear and retainer (e):

•Spread the retainer wings slightly to disengage from

the worm gear and slide the retainer center pin out

from the aperture in the motor shaft.

•Pull out the worm gear.

11.Pull out the interrupter cup (f).

12.Pull out the wire harness assembly plug from the(g)

sensor assembly .

13.Remove the sensor assembly (h) from the motor

bracket:

• With long-nosed pliers, squeeze one of the two

retainer prongs protruding through the motor bracket

(i) while lightly pulling away the sensor assembly to

free the prong from its hole. (This works best when

the pliers are held as vertically as possible.)

• Repeat with the second prong.

• Unhook and discard the old sensor assembly.

14.Install the new sensor assembly:

•Place the retaining hook over the edge of the slot in

the motor bracket.

• Align prongs with holes and snap the assembly in

place.

15.Plug the wire harness into the new sensor.

16.Replace the interrupter cup, pushing it all the way to the

end of the motor shaft, against the collar.

17.Reverse steps 10-1 to reassemble the unit and

reconnect power.

NOTE: A test of the safety reverse system is necessary for

safe operation. Follow the instructions on the reverse or in

your owner’s manual.

WARN

WARN

WARN

WARNWARNING

ING

ING

INGING

b

e

f

c

d

i

g

h

h

a

(squeeze)

Product specificaties