TM-9-2350-274-BD

M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1984

TM-9-2350-274-BD - Page 160 of 219

TM 9-2350-274-BD

COMMUNICATIONS SYSTEM

Procedural Steps (Cont):

7.

a.

Connect the CVC helmet to the chest plate switch. Connect the chest plate

switch to any of the R-124 receptacles (5, 10, 12, or 14 in the intercom

figure).

b.

Set FUNCTION SWITCH (2) and FUNCTION SWITCH (15) to the intercom BC

position. (Both function switches must be in the BC position to allow all four

boxes access to intercom.)

c.

Adjust VOLUME CONTROL (4) for desired audio level in the headsets.

Record the BDAR action taken.

When the mission is completed, as soon as

practicable, repair vehicle using standard maintenance procedures.

11-14