Mircom MD-1244 Installation Instructions Manual

Installation Instructions for Replacement
MD-1244 Microphone

The kit consists of the following parts:

• MD-1244: microphone circuit board with ad he siv e str ips on flat side

• wiring harness

You will also need the following tools:

• Screwdriver or a utility knife

• A multimeter probe

To install the microphone, you must perform the following steps:

A. Shut down the unit and disconnect power
B. Remove the old microphone
C. Attach MD-1244 to the door
D. Connect the wiring harness

Details on how to perform these steps are in the following pages.

A. Shut down the unit and disconnect power

It is essential that you follow the proper shut do w n pro c edu re .

To shut down the TX3 Touch Screen:

1. At the Touch Screen terminal, enter 9999.

2. Enter your administrator password, and then press OK.

3. Select File > Shut down > Shut down.

4. After the TX3 Configurator and Windows have finished shutting down, di sconnect power
from the Touch Screen.

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B. Remove the old microphone

1. Open the door.

2. Use a screwdriver or utility knife to remove the old microphone circuit board from the
inside of the Touch Screen door.

3. Clean any residue left behind.

Figure 1 Old microphone on the Touch Screen door

4. Disconnect the old microphone cable.

C. Attach MD-1244 to the door

The MD-1244 attaches to the inside of the Touch Screen door with double-sided tape. The
microphone fits into an indentation in the door. For ideal sound quality, the microphone
opening on the flat side of the MD-1244 (see Figure 2) must align with the microphone
opening on the door.

Figure 2 Location of the microphone opening on MD-1244

Microphone opening on
MD-1244

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