TM-9-2350-274-BD M109 Battlefield Damage Assessment and Repair Download
Page 148 of 219
TM 9-2350-274-BD COMMUNICATIONS SYSTEM SECTION II. General Operating Procedures 11-4. General. This section contains general operating procedures for the AN/VIC-1 intercommunications set. TM 11-5830-340-12 lists operating procedures for the system, but for convenience, the main points have been reproduced here. a. Normal Intercom Operation with the AN/VIC-1 Intercommunications Set without radios. 1. Turn turret power on. Turn MAIN PWR switch on the AM-1780 to INT ONLY. Power is now available for intercom equipment. See figure 11-1. 2. Turn POWER CKT BKR switch on the AM- 1780 to ON. This supplies power to AM-1780 and all control boxes connected to the AM-1780. 3. Turn INSTALLATION SWITCH on the AM-1780 to OTHER. 4. Intercom only operation is now possible using the control boxes and the audio accessories connected to them. 5. To turn off the AM-1780, place the MAIN PWR and POWER CKT BKR switches to OFF. Figure 11-1. AM-1780 Amplifier 11-2