TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 98 of 775
TM 9-2350-311-10
2–1 OPERATOR’S CONTROLS, INDICATORS, AND INSTRUMENTS — CONTINUED
2–1.4
Crew Controls and Instruments — Continued
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AMPLIFIER AM-1780/VRC
COMMANDER’S CONTROL BOX
C-2298/VRC
AN/PRC-68 RADIO AND APPLIQUE
OG-174
CONTROL CASE C-10327/GYK–29
COMBAT OVERRIDE SWITCH
(M109A4/M109A5)
NBC CONTROL BOX ASSEMBLY
(M109A4/M109A5)
DATA DISPLAY, GUN DIRECTION,
OD-144(V)/GYK–29
DATA DISPLAY, DEFLECTION/ELEVA-
TION (ID--2124/GYK–29)
DATA DISPLAY, DEFLECTION/
ELEVATION (ID-2124/GYK–29)
Provides power and voice switching circuitry for vehicular inter-
communications systems.
Provides operator attachment to vehicular system.
Provide two-way radio communication. Refer to
TM 11-5820-882-10 for operation of AN/PRC-68 radio.
Refer to TM 11–7440-283-12–1 and TM 11–7440-283-12–2
for operation of the AN/GYK–29 battery computer system.
Used to aid in starting the engine in emergency situations.
Provides operational control of vehicular NBC equipment.
Refer to TM 11–7440-283-12-1 and TM 11–7440-283-12–2
for operation of the AN/GYK–29 battery computer system.
Located on right front cab roof.
Refer to TM 11–7440-283-12–1 and TM 11–7440-283-12–2
for operation of the AN/GYK–29 battery computer system.
Located on left front cab roof.
Refer to TM 11–7440-283-12–1 and TM 11–7440-283-12–2
for operation of the AN/GYK–29 battery computer system.
2-14
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