Buzzer Assembly DS101 or DS201

TM 11-5820-477-30

2-11. Buzzer Assembly DS101 or DS201

This task covers:

a. Removal

b. Installation

c. Adjustment

INITIAL SETUP

Personnel Required

Tools

2 Technicians

Tool Kit, Electronic Equipment TK-105/G

Spanner Wrench

NOTE

Buzzer assembly DS101 is located on local control unit. Buzzer assembly DS201 is

located on remote control unit. Removal, installation and adjustment procedures are the

same for both.

a. Removal (figure 2-8)

CAUTION

Do not use a soldering gun; damaging voltages can be induced in the components. Use

a pencil-type soldering iron with 25 watt maximum capacity. Both control units are

transistorized. If only at-operated iron is available, use an isolating transformer.

NOTE

When removing soldered leads, tag each lead as it is unsoldered from its terminal to

facilitate reconnection.

(1) Release clamp on each side of control unit and slide chassis out of case.

(2) Tag and unsolder three wires connected to buzzer assembly (1).

(3) Remove four flathead screws (2) securing cover assembly (3) to front panel. Remove cover assembly.

(4) Using spanner wrench, unscrew ring nut (4) which secures buzzer assembly (1) to front panel.

(5) Remove O-ring retainer (5), O-ring (6), diaphragm assembly (7) and spacer ring (8) and remove buzzer

a s s e m b l y (1).

b. Installation. (figure 2-8)

(1) Insert buzzer assembly (1) into front panel opening.

(2) Install spacer ring (8), diaphragm (7), O-ring (6), O-ring retainer (5), and ring nut (4) on buzzer unit (1).

(3) Tighten ring nut (4) , using spanner wrench.

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