3M XT-1 Boletim Técnico - Página 3

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Replacing the Inner Case Assembly, Outer Case Assembly, and Boom Microphone Assembly

Replacing the Inner Case Assembly

Tools Required:

1 - Small size Phillips screwdriver

1 - External retaining ring removal tool

3M OEM Parts and SKUs:

Procedure:

Important Note:

Be careful to avoid pinching wires between case halves when

reassembling the electronics case. Damaged wiring may cause the

headset to fail during use.

1. Make sure power is off and remove the battery from the headset as illustrated in Fig 3.

2. Remove the ear pad by using your fingers to pull the ear pad from the ear cup.

Then grasp the headset firmly in one hand, and pull the ear cup off the speaker

with the fingers of the other hand. See Fig 4.

3. To disassemble the electronics side of the headset begin by removing the three

screws shown in the illustration in Fig 5.

4. Carefully separate the inner and outer halves of the case assembly.

Support the Inner Case so the speaker cable is not strained.

Important Note:

It is important to disconnect the speaker from the main circuit

board as soon as the inner and outer case are separated to avoid

stress on the wires inside the sealed enclosure. Replace the entire

inner case assembly if the wires are broken at the speaker.

5. Remove the speaker wiring connector from the main circuit board. See Fig 6.

6. To install the new replacement Inner Case, connect the speaker wiring connector

on the speaker wires to the connector on the main circuit board.

7. Make sure the LED Lens is still in place. Otherwise, follow the procedure

Replacing the Indicator LED Lens to re-install the LED Lens.

8. Bring the two halves together and replace the screws as shown in Fig 5.

9. Reinstall the battery (Fig 7) and check operation of the headset prior to returning

it to regular operation.

FIGURE 3

FIGURE 4

FIGURE 5

FIGURE 6

FIGURE 7

Speaker Wiring

Connector