6 - 22 MTH800 TETRA Handportable Terminal / Basic Service Manual MAINTENANCE
5. Apply DC 744 RTV white-color adhesive (Motorola part # 1186134U01) to the
inner perimeter of the selector knob.
6. Insert the selector knob cover (3687537V02) by using a tiny pin.
7. Use hand tool to push down the selector knob cover. Wipe off excess
adhesive using a lint-free cloth. Make sure the selector knob cover is fully
pressed.
8. Install the display & chassis assembly.
Removing and Installing the Microphones
Recommended tools: tweezers or narrow blade knife, mini flat-tip screwdriver
To remove the top microphone from the unit
(See Figure 15)
1. Remove the display & chassis assembly. Refer to “Removing and installing
the Display” on page 15.
2. To remove the top microphone, press slightly its rubber boot and slightly
insert the tweezers or knife inside the boot between the microphone plastic
housing and the rubber boot.
3. With an upward motion of the tweezers or knife, remove the microphone. The
microphone might be damaged during the removal and should then be
replaced by a new one.
To install the top microphone
1. Insert the top microphone into location.
2. Install the display & chassis assembly.
To remove the bottom microphone from the unit
(See Figure 15)
1. Remove the display & chassis assembly. Refer to “Removing and installing
the Display” on page 15
.
Do not try to remove the keypad board before removing
the accessory connector retainer and the accessory
connector as this may damage the microphone spring
contacts.
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