advertisement
T M 1 1 - 5 8 3 0 - 3 4 0 - 1 2
.
TECHNICAL MANUAL
OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL
INTERCOMMUNICATlON SET
AN/VI C-1(V)
(NSN 5830-00-856-3273)
CONTROL, INTERCOMMUNICATlON
SETS C-10456/VRC
(NSN 5830-01-082-0804)
AND C-10680/VRC
AND AMPLIFIER, AUDIO
FREQUENCY AM-7046/VRC
This publication is required for official use or for administrative or operational purposes only. Distribution Is
Iimited to US Government Agencies. Other requests for this document must be referred to Commander, US Army
Communications-Electronics Command and Fort Monmouth,
ATTN: AMSEL-ME-P, Fort Monmouth, NJ 07703-5007.
HEADQUARTERS, DEPARTMENT OF THE ARMY
15 JANUARY 1986
Change
No 4
TM 11-5830-340-12
C4
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 1 July 1995
OPERATOR’S AND UNIT MAINTENANCE MANUAL
INTERCOMMUNICATION SET AN/VIC-1(V)
(NSN 5830-00-856-3273), (EIC: GCW),
AND
CONTROL, INTERCOMMUNICATION SET C-10456/VRC
(NSN 5830-01-082-0804), (EIC: N/A)
TM 11-5830-340-12, dated 15 January 1986 is changed as follows:
1.
Remove old pages and insert new pages as indicated below. New or changed material is indicated by a vertical bar in the margin of the page. Added or revised illustrations are indicated by a vertical bar adjacent to the identification number.
Remove pages
1-1 and 1-2
3-5/(3-6 blank)
4-13 and 4-14
5-5 and 5-6
A-1 and A-2
B-1 through B-5/(B-6 blank)
Insert pages
2.
File this change sheet in the front of the publication for reference purposes.
DISTRIBUTION:
To be distributed in accordance with DA Form 12-51-E, block 2985 requirements for TM 11-5830-340-12.
Change
No. 3
TM 11-5830-340-12
C 3
HEADQUARTERS
DEPARTMENTS OF THE ARMY
Washington, DC, 15 June 1990
OPERATOR’S AND UNIT MAINTENANCE MANUAL
INTERCOMMUNICATION SET AN/VIC-l (V)
(NSN 5830-00-856-3273),
AND
CONTROL, INTERCOMMUNICATION SET C-10456/VRC
(NSN 5830-01-082-0804)
TM 11-5830-346-12, 15 January 1986, is changed as follows:
1.
Title of manual is changed as shown above.
2.
Remove old pages and insert new pages as indicated below.
New or changed material is indicated by a vertical bar in the margin of the page.
Added or revised illustrations are indicated by a vertical bar adjacent to the identification number.
Insert pages Remove pages i through iii/(iv blank)
1-1 through 1-6
2-1 and 2-2
2-5 and 2-6
2-9 through 2-12
3-1 through 3-4
4-3 through 4-12
5-3 through 5-6
A-1 and A-2
B-3 through B-5/(B-6 blank) i through iii/(iv blank)
1-1 through 1-6
2-1 and 2-2
2-5 and 2-6
2-9 through 2-12
3-1 through 3-4
4-3 through 4-11/(4-12 blank)
5-3 through 5-6
A-1 and A-2
B-3 through B-5/(B-6 blank)
2.
File this change sheet in front of the publication for reference purposes.
Distribution authorized to the Department of Defense and DOD contractors only for official use or for administration or operational purposes. This determination was made on 15 April 1989. Other requests for this document will be referred t o C o m m a n d e r , U S A r m y C o m m u n i c a t i o n s - E l e c t r o n i c s C o m m a n d a n d F o r t
M o n m o u t h , A T T N : A M S E L - L C - M E - P , F o r t M o n m o u t h , N J 0 7 7 0 3 - 5 0 0 0 .
DISTRUCTION NOTICE --Destroy by any method that will prevent disclosure of contents or reconstruction of the document.
By Order of the Secretary of the Army:
CARL E. VUONO
General, United States Army
Chief of Staff
Official:
WILLIAM J. MEEHAN II
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION:
To be distributed in accordance with DA Form 12-51 operator and unit requirements for AN/VIC-1(V).
Change
No. 2
TM 11-5830-340-12
C 2
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 15 December 1988
OPERATOR’S AND ORGANIZATIONAL MAINTENANCE MANUAL
INTERCOMMUNICATION SET AN/VIC-1(V) (NSN 5830-00-856-3273),
CONTROL, INTERCOMMUNICATION SETS C-10456/VRC (NSN 5830-01-082-0804)
AND C-10680/VRC AND AMPLIFIER, AUDIO FREQUENCY AM-7046/VRC
TM 11-5830-340-12, 15 January 1986, is changed as follows:
1.
Remove old pages and insert new pages as indicated below. New or changed material is indicated by a vertical bar in the margin of the page. Added or revised illustrations are indicated by a vertical bar adjacent to the identification number.
Remove pages Insert pages
1-1 and 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 and 1-2
1-5 and 14. . . . . . . . . . . . . . . . . . . 1-5 and 1-6
B-3 and B-4 . . . . . . . . . . . . . . . . . . . . . . . . . B-3 and B-4
2. File this change sheet in the front of the publication for reference purposes.
Distribution authorized to the Department of Defense and DOD contractors only for official use or for administration or operational purposes. This determination was made on 31 August 1988. Other requests for this document will be referred to Commander, US Army Communications-Electronics Command and Fort
Monmouth, ATTN: AMSEL-LC-ME-P, Fort Monmouth, NJ 07703-5000.
DESTRUCTION NOTICE -- Destroy by any method that will prevent disclosure of contents or reconstruction of the document.
By Order of the Secretary of the Army:
CARL E. VUONO
General, United States Army
Chief of Staff Official:
R.L. DILWORTH
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION :
T o b e d i s t r i b u t e d i n a c c o r d a n c e w i t h D A F o r m 1 2 - 5 1 O p e r a t o r a n d
U n i t r e q u i r e m e n t s f o r A N / V I C - 1 ( V ) .
Change
No. 1
TM 11-5830-340-12
C 1
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 1 December 1987
OPERATOR’S AND ORGANIZATlONAL MAINTENANCE MANUAL
INTERCOMMUNICATION SET AN/VIC-1(V) (NSN 5830-00-856-3273),
CONTROL, INTERCOMMUNICATION SETS C-10456/VRC (NSN 5830-01-082-0804)
AND C-10680/VRC AND AMPLIFIER, AUDIO FREQUENCY AM-7046/VRC
TM 11-5830-340-12, 15 January 1986, is changed as follows:
1.
Remove old pages and insert new pages as indicated below. New or changed material is indicated by a vertical bar in the margin of the page. Added or revised illustrations are indicated by a vertical bar adjacent to the identification number.
Remove pages Insert pages
1-1 through 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 through 1-6
2-13 and 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 and 2-14
5-5 and 5-6. . . . . . . . . . . . . . . . . . . . . . . 5-5 and 5-6
B-3 through B-5/( B-6 blank) . . . . . . . . . . . . . . . . . . . . B-3 through B-5/( B-6 blank)
2. File this change sheet in the front of the publication for reference purposes.
Distribution authorized to the Department of Defense and DOD contractors only for official use or for administration or operational purposes. This determination was made on 31 August 1987. Other requests for this document will be referred to Commander, US Army Communications-Electronics Command and Fort
Manmouth, ATTN: AMSEL-ME-P, Fort Monmouth, NJ 07703-5000.
DESTRUCTION NOTICE – Destroy by any method that will prevent disclosure of contents or reconstruction of the document.
By Order of the Secretary of the Army:
CARL E. VUONO
General, United States Army
Chief of Staff Official:
R.L. DILWORTH
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION:
To b e d i s t r i b u t e d i n a c c o r d a n c e w i t h D A F o r m 1 2 - 5 1 l i t e r a t u r e requirements for AN/VIC-l(V).
TM 11-5830-340-12
SAFETY PRECAUTION
REVIEW THE SAFETY IDEAS IN TB 385-4 (SAFETY PRECAUTIONS
FOR MAINTENANCE OF ELECTRICAL/ELECTRONIC EQUIPMENT).
When the equipment is operated with covers removed, DO NOT TOUCH exposed connections or components. MAKE CERTAIN you are not grounded when making connections or adjusting components inside the equipment.
If someone is a victim of ELECTRICAL SHOCK, follow the FIVE SAFETY STEPS given in the
SAFETY INSTRUCTIONS in the front of this manual.
DO NOT SERVICE OR ADJUST EQUIPMENT ALONE!!!
Do not attempt internal service or adjustment unless another person, capable of giving FIRST AID and RESUSCITATION, is PRESENT.
A
TM 11-5830-340-12
SAFETY STEPS TO FOLLOW IF SOMEONE
IS THE VICTIM OF ELECTRICAL SHOCK
DO NOT TRY TO PULL OR GRAB THE INDIVIDUAL
IF POSSIBLE, TURN OFF THE ELECTRICAL POWER
IF YOU CANNOT TURN OFF THE ELECTRICAL
POWER, PULL, PUSH OR LIFT THE PERSON TO
SAFETY USING A WOODEN POLE OR A ROPE OR
SOME OTHER INSULATING MATERIAL
SEND FOR HELP AS SOON AS POSSIBLE
AFTER THE INJURED PERSON IS FREE OF
CONTACT WITH THE SOURCE OF ELECTRICAL
SHOCK, MOVE THE PERSON A SHORT DISTANCE
AWAY AND IMMEDIATELY START ARTIFICIAL
RESUSCITATION
TM 11-5830-340-12
WARNING
Do not be misled by the term “low voltage”. Potentials as low as 50 volts can cause death under adverse conditions. Remove or tape all exposed personal metal objects such as watches, rings or medallions before working on equipment.
WARNING
Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged breathing of vapor should be avoided. The solvent should not be used near heat or open flame; the products of decomposition are toxic and irritating, Since TRICHLOROTRIFLUOROETHANE dissolves natural oils, prolonged contact with skin should be avoided. When necessary, use gloves which the solvent cannot penetrate. If the solvent is taken internally, consult a physician immediately.
WARNING
The vehicle battery can give off explosive gas. Don’t smoke and be careful to avoid sparks when working near the battery; otherwise, you may cause an explosion injuring yourself and others.
CAUTION
Throughout this manual, there are cautions that must be observed when doing specific tasks to avoid possible damage to the equipment. Read each caution carefully and adhere to the appropriate safety procedures when doing the work,
C/(D blank)
TM 11-5830-340-12
CHAPTER 1
INTRODUCTION
1-1. Scope a General. This manual provides operator and organizational maintenance instructions for Intercommunication Set AN/VC-l(V). It also provides instructions for Control, Intercommunication Set
C-10456/VRC (used in M1 Tank (Abrams).
b. Oficial Nomenclature. Official nomenclature followed by (*) indicates all models of the equipment.
c. Common Names. Throughout this manual, the following common names are used to indicate equipment. (See listing below.) d. Control and Audio Frequency Amplifiers.
(1) AU references to AN/VIC-1(V) and
components of AN/WC-l(V) (fig. 1 – 1) apply to
the C– 10456/VRC (which is similar in appearance and performance to the C–2298/VRC.
(2) All references to the AM-1780/VRC also a p p l y t o t h e A M - 1 7 8 0 A / V R C a n d
AM – 1780B/VRC unless otherwise indicated.
e. Crewmembers are provided with Combat Vehicle
Crewmember (CVC) Helmet (fig. 2-8) or Armored
Vehicle Crewmember (AVC) Helmet (fig. 2–8) for
Section I. GENERAL use in combat vehicles. In APG, command posts, etc., crewmembers are provided with headset –microphone sets, microphones, and headsets.
f. The AM-1780/VRC can be connected through field wires to a telephone to enable the telephone users to communicate with the crewmembers.
g. Control, Intercommunication Set C–10456/VRC is used in Ml Tank (Abrams) (TM 9-2350–355-10).
It is similar to the C–2298/VRC except that it is provialed with a remote keying connector, J805/P805 (fig
2–5) to enable certain crewmembers to use the re-
mote keying controls/switches provided in the Ml
Tank. Thus, the crewmember can key the radio or intercom using the foot or thumb switch instead of the switch on the crewmember’s helmet.
h. Deleted i. Filter, Dc Power, F-1416/VRC is provided in
Howitzer M109, A1, A2 to filter the dc power applied
to the driver’s control box through vehicle wiring (fig.
Common name
AN/VRC- 12 series radios
Receiver - transmitters
Receiver- transmitter
Radio- interercom system
Intercom set
AM-178O/VRC
Suppressor
Control box(es)
Reference
TM 11-5820-401-10-L
TM 11-5820-401-20-2
TM 11-5820-401-10-2,
TM 11-5820-401-20-2
TM 11-5820-498–12,
TM 11–5820-667-12
Audio accessories
CVC helmet/AVC helmet
Radio mounts TM 11-5820-401-10-2,
TM 11-5820-401-20-2.
Change 4 1-1
1-2. Maintenance Forms, Records, and Reports a. Reports of Maintenance and Unsatisfactory
Equipment. Department of the Army forms and procedures used for equipment maintenance will be those prescribed by DA Pam 738-750 as contained in Maintenance Management Update.
b. Reporting of Item and Packaging Discrepancies.
Fill out and forward SF 364 (Report of Discrepancy
(ROD)) as prescribed in AR 735-11-2/DLAR
4140.55/SECNAVINST 4355.18/AFR 400-54/MCO
4430.3J.
c. Transportation Discrepancy Report (TDR) (SF
361). Fill out and forward Transportation Discrepancy
Report (TDR) (SF 361) as prescribed in AR
55-38/NAVSUPINST 4610.33 C/AFR 75-18/MCO
P4610.19D/DLAR 4500.15.
1-3. Reporting Equipment Improvement Recommendations ( EIR )
If your AN/VIC-l(V) Intercommunication Set needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us what you don’t like about the design. Put it on an SF 368
( P r o d u c t Q u a l i t y D e f i c i e n c y R e p o r t . M a i l it to Commander, US Army Communicant ions-
E l e c t r o n i c s C o m m a n d a n d F o r t M o n m o u t h ,
ATTN: AMSEL-PA-MA-D, Fort Monmouth, New
J e r s e y 0 7 7 0 3 - 5 0 0 0 .
W e ' l l s e n d y o u a r e p l y .
1-4. Administrative Storage
Administrative storage of equipment issued to and used by Army activities will have preventive maintenance performed in accordance with the PMCS charts before storing. When removing the equipment from administrative storage the PMCS should be performed to assure operational readiness. Disassembly and repacking of equipment for shipment or limited storage are covered in the procedures prescribed for the vehicle.
1-5. Destruction of Army Electronics Materiel
Destruction of Army electronics materiel to prevent enemy use shall be in accordance with TM 750-244-2.
1-6. Hand Receipt Manuals
Hand receipt manuals are available covering the radio equipment in tracked vehicles into which the
AN/VIC-l(V) is installed. The manuals do not cover the AN/VIC-l(V) without radios, The hand receipt manuals contain preprinted DA Forms 2062 (Hand
Receipt/Annex No.) listing the vehicle and the radiointercom system (AM-1780/VRC and Control Boxes
C-2296/VRC, C-2297/VRC, and C-2298/VRC), the radio, cabling, audio equipment installed in the vehicle, Following are hand receipt publications:
a. TM 11-5820-401-10-2-HR – AN/VRC-12 series radios used with intercom.
b. TM 11-5820-498-12-HR - AN/VRC-53, -64,
AN/GRC-125, -160 radios used with and without intercom.
1-7. Consolidated Index of Army Publications and
Blank Forms
Refer to the latest issue of DA Pam 25-30 to determine whether there are new editions, changes or additional publications pertaining to the equipment.
Section Il. DESCRIPTION AND DATA
1-8. Purpose and Use
Intercommunication Set AN/VIC-l(V) provides voice communication between members of crew-served weapon and between crewmembers of a vehicle. The
AN/VIC-l(V) also provides crewmembers of the facility to communicate on the radios that may be associated with the AN/VIC-l(V) in the vehicle.
a. The AN/VIC-l(V) is installed without radios in the following vehicles:
(1) Gun, 175 MM, Self-Propelled, M107 and in
Howitzer, Heavy, 8-inch, Self-Propelled, M110
(TM 9-2350-216-10).
(2) Howitzer, M105MM, Self-Propelled, M108 and in Howitzer, Medium, 155 MM, Self-Propelled,
. M109 (TM 9-2350-217-10 (fig, 4-5)).
b. The AN/VIC-l(V) is used with vehicular radios
(para l-11e) in such crewmember combat vehicles as tanks, armored personnel carriers (APC), and armored
command posts (ACP) (fig. 4-9 and 4-10).
(1) In such vehicles as armored personnel carriers, and armored command posts, the AN/VIC-l(V) consists of Amplifier, Audio Frequency AM-1780/VRC and Control, Intercommunication Set C-2298/VRC
(fig. 4-4) for each crewmember.
(2) In tanks, except Abrams, the AN/VIC-l(V) also includes Control, Intercommunication Set
C-2297/VRC for the driver, and Control, Intercommunication Set C-2296/VRC mounted outside the
c. The AN/VIC-1(V) is part of the electronic installation harness of howitzers (a above) and combat vehicles (b above). The harness includes the mounts for the radios, interconnecting cables for the radios and the AN/VIC-l(V) and power cables. Refer to
paragraph 1-11 for information on equipment required
to make the AN/VIC-l(V) operational.
Change 1 1-3
TM 11-5830-340-12
1-9. Technical Characteristics a . C - 2 2 9 6 / V R C , C - 2 2 9 7 / V R C , C - 2 2 9 8 / V R C , C - 1 0 4 5 6 / V R C
Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intercom function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
500 to 3,000 Hz.
Provides communication between crewmembers.
Provides communication on all radios connected to AM-1780/VRC.
Radio function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio accessories:
Microphone impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset and loudspeaker impedance . . . . . . . . . . . . . . . . . . . . . . .
150 ohms ± 15 percent.
150 ohms ± 20 percent.
LINE binding posts of C-2296/VRC . . . . . . . . . . . . . . . . . . . . . . .
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
600 ohms ± 20 percent.
22 to 30 volts dc.
b . A M - 1 7 8 0 / V R C
Frequency range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intercom function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit impedances:
Microphone circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset and loudspeaker circuits . . . . . . . . . . . . . . . . . . . . . . . . . .
LINE binding posts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUDIO INPUT binding posts . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio transmitter microphone input circuit . . . . . . . . . . . . . . . . .
Radio receiver audio output circuits . . . . . . . . . . . . . . . . . . . . . . . .
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
500 to 3,000Hz.
Provides control of radios selected by control boxes.
Provides communication (intercom) between control boxes,
150 ohms ± 15 percent.
150 ohms ± 20 percent.
600 ohms ± 20 percent.
5,000 ohms.
150 ohms ± 20 percent.
150 ohms ± 20 percent.
22 to 30 volts dc.
1-10. Components
The AN/VIC-l(V) includes the AM-1780/VRC and as many control boxes as necessary for the particular vehicle. A maximum of six control boxes may be connected.
NOTE
The C-10456/VRC is not a component o f t h e A . N / V I C - l ( V ) . H o w e v e r , w h e n i t i s i n s t a l l e d i n a p a r t i c u l a r c o m b a t v e h i c l e i n c o n j u n c t i o n w i t h t h e
A M - 1 7 8 0 / V R C , t h e c o n f i g u r a t i o n m a y b e c o n s i d e r e d a s a n “ A N / V I C - l ( V ) ” .
Item
Amplifier, Audio Frequency AM-1780/VRC a
Control, Intercommunication Set C-2298/VRC a
Control, Intercommunication Set C-2297/VRC a
Control, Intercommunication Set C-2296/VRC a
Control, Intercommunication Set C-10456/VRC a
NSN
5820-00-892-3342
5820-00-892-3339
5820-00-892-3337
5820-00-892-3338
5830-00-01-0824
Height
Dimensions (in.)
Depth Width
3¾
4½
. . . . . .
. . . . . .
5
5¾
5¾
. . . . .
. . . . .
3¾
92/3
3¼
. . . .
. . . .
3¼
Qty
1
See note b below,
See note c below.
See note c below.
See note b below.
a. The components are installed with the required hardware.
b. One control box is provided each crewmember.
c. In some vehicles, one C-2297/VRC is provided for the driver’s position and one C-2296/VRC is mounted on the outside of the vehicle.
1-11. Description
a. Amplifier, Audio Frequency AM-1780/VRC
(1) The audio frequency amplifiers are the main junction box for the AN/VIC-l(V). They provide control of the dc power to the associated crewmember control boxes (b, c, and d below) and to the radio system that may be connected to the amplifiers. The amplifiers also amplify and control the audio signals in the intercommunication (intercom) and radio circuits,
(2) All operating controls are provided on the front panel. Ten jacks are provided on the top, bottom, and sides for connections to the control boxes and the radio(s). Two pairs of binding posts are provided on the front panel for connection to a telephone and the audio output of an auxiliary radio. Mounting lugs are provided on the sides. Captive screws hold the gaskets e a l e d b a c k c o v e r . A l l c o n t r o l s a n d j a c k s a r e waterproof.
b. Control, Intercommunication Set C-2298/VRC,
C-10456/VRC
(1) When an audio accessory is connected to the control box, the crewmember can select, by means of the MONITOR switch and the audio accessory controls, to communicate on the intercom circuit with
1-4 Change 3
TM 11-5830-340-12 other crewmembers, and on the radio(s) connected to the AM-1780/VRC
(2) The MONITOR switch is located on the f r o n t p a n e l ; t h e V O L U M E c o n t r o l i s l o c a t e d o n t h e b o t t o m o f t h e b o x . A j a c k o n e a c h s i d e o f t h e b o x p r o v i d e s c o n n e c t i o n t o t h e
AM-1780/VRC (or another C-2298/VRC). Jacks o n t h e b o t t o m p r o v i d e c o n n e c t i o n t o t h e a u d i o a c c e s s o r i e s . M o u n t i n g l u g s a r e p r o v i d e d o n t h e s i d e s .
C a p t i v e s c r e w s h o l d t h e g a s k e t - s e a l e d b a c k c o v e r .
(3) The C-10456/VRC is installed in combat vehicle, Ml Abrams and in Fighting Vehicle System (FVS)
M2 and M3.
c. Control, Intercommunication Set C-2296/VRC.
(1) The C-2296/VRC is provided with Handset
H-207/VRC to enable the user to communicate on the intercom circuit with other crewmembers, or on the radio(s) connected to the AM-1780/VRC.
(2) The radio and intercom control switch and
VOLUME control are located on the front panel. A jack on the left side provides connection through the vehicle wiring to the C-2297/VRC located inside the vehicle, A jack on the right side provides connection of the cable assembly to an external call light mounted in the cover of the box containing the C-2296/VRC. A pair of binding posts provides connection to a telephone. Mounting lugs are provided on the sides.
Captive screws hold the gasket-sealed back cover,
(3) The H-207/VRC has a push-to-talk switch, a dynamic. microphone and an earphone, and a retractile cord connected to the C-2296/VRC.
d. Control, Intercommunication Set C-2297/VRC,
(1) When an audio accessory is connected to the
C-2297/VRC, the crewmember can elect, by means of the MONITOR switch and the audio accessory controls, to communicate on the intercom circuit with other crewmembers, or on the radios connected to the the AM-1780/VRC.
(2) The MONITOR and SIG-EXT-OFF switches are located on the front panel; the VOLUME control is located on the bottom of the box. When the SIG-E XT-
OFF switch is in EXT position, the C-2296/VRC (c above) is enabled to become part of the radio and intercom circuits. A jack on the left side provides connection to the AM-1780/VRC; the jack on the right side provides connection through the vehicle wiring to the C-2296/VRC. Jacks on the bottom provide connection to audio accessories. Mounting lugs are prov i d e d o n t h e s i d e s . C a p t i v e s c r e w s h o l d t h e gasket-sealed back cover.
1-12. Equipment Required to Make AN/VIC-l (V)
Operational a. General. Items required to make the AN/VIC-l(V) operational are supplied by various means, depending on the particular vehicle in which it is installed. Dc power (22 to 30 volts dc) is provided by the vehicular electrical system.
(1) Supply Bulletin SB 11-131 lists the parts and
National stock numbers of the vehicular electronic installation harnesses and installation kits which contain the AN/VIC-1(V), and the accessory kits required to install the harness.
(2) The electronic installation harness is part of tracked vehicles (c below). It includes the AN/VICl(V), radio mounts, interconnecting and power cables, mounting brackets for the various components, and the MX-7778(*)/GRC.
The MX-7778(*)/GRC includes the Suppressor, MX-7777(*)/GRC and
Cable, CX-10613/VRC. The basic radio set components are provided by the using organization.
(3) Accessory kits complement the electronic installation harnesses. They include audio accessories, some interconnecting cables, the whip antenna parts for use with Receiver, Radio R-442(*)/VRC (used in some AN/VRC-12 series radio configurations), and i n s t r u c t i o n s f o r i n s t a l l i n g t h e h a r n e s s a n d t h e accessory kit. The accessory kits are a combination of items required for use with a specific type of radio in a specific type of combat (tracked) vehicle, Items are readily installed and do not become a part of the vehicle.
(4) Installation kits contain appropriate audio accessories, radio mounts, interconnecting cables and hardware necessary to mount the AN/VIC-l(V) in the vehicle. The kits are not part of the vehicle; thus, they are removed and used on another vehicle when the vehicle is turned in. Installation instructions for the kits are provided as part of the installation kits per
SB 11-131.
(5) A general purpose installation kit is provided for nonvehicular installation. It includes audio accessories, radio mounts, interconnecting cables, power cable, and general purpose mounting hardware.
A power supply such as Power Supply PP-2953(*)/U is required to operate the equipment.
b. Wheeled Vehicles. A representative wheeled vehicle in which the AN/VIC-1(V) is used is Truck, Cargo,
1¼-Ton, 6X6, M561. The items required to install the equipment are provided in the installation kit (a(4) above).
c. Tracked Vehicles.
(1) Representative tracked vehicles include: Tank
Full Tracked, M60Al; Carriers, Personnel, Armored,
Ml13 and Ml14; Carrier, Command Post M577; and
Change 3 1-5
TM 11-5830-340-12
(2) The items required for installation and operation of the AN/VIC-l(V) are provided in the electronic installation harness and the accessory kit (a(2) and (3) above) for the particular vehicle.
(3) The audio accessory for some tracked vehicles is contained in the CVC helmets provided for each of the crewmembers.
d. Marine Craft. Generally, installation harnesses in marine craft are considered in the same category as those for tracked vehicles (c above); and once installed, are considered as part of the marine craft.
e. Compatible Radio Sets. Following are various vehicular radio sets which may be connected to the
AN/VIC-l(V).
(1) AN/VRC-12 series radios (TM 11-5820-401-
10-2).
(2) Radio Sets AN/VRC-53, AN/VRC-64,
AN/GRC-125, and AN/GRC-160 (TM 11-5820-498-
12).
(3) Radio Teletypewriter Set AN/VSC-3 (TM
11-5815-332-15).
f. Typical Configurations. See listing below for typical configurations of the AN/VIC-l (V).
1-13. Differences in Models
The AM-1780/VRC and the AM-1780A/VRC are provided with rubber-covered binding posts and the designation of
TEL/REMOTE is used instead of LINE (fig. 2-l). The
AM-1780B/VRC is similar in appearance and performance to the AM-1780AVRC, except for internal configuration.
1-6 Change 3
TM 11-5830-340-12
CHAPTER
2
OPERATING INSTRUCTIONS
2-1.
Amplifier, Audio Frequency AM-1780/VRC Jacks,
Controls and Indicator
a.
Jacks.
Section 1. JACKS, CONTROLS AND INDICATORS
(1) J501 provides power to the AM-1780/VRC when used with radio sets. It also provides for audio a n d c o n t r o l i n t e r f a c e s i g n a l s o f “ A ” r e c e i v e r transmitter. When radios are not used in conjunction with the intercom set, J501 is left vacant and the
INSTALLATION SWITCH must be set to INT
ONLY.
(2) J503 provides audio signals and control interface signals of “C” receiver-transmitter.
(3) J504 should always be connected to the commander’s control box. It provides intercom and radio interface that is independent of all other control boxes.
(4) J505, J506 and J507 are wired in parallel.
They are used by other crewmembers, as required, to the intercom and radio interface functions.
(5) J508 provides power to the AM-1780/VRC when radios are not used. It may also provide audio signals from “C” receiver.
(6) J509 and J511 provide for connection of a
C-2299/VRC automatic retransmission (relay) control box used with some radio installations.
(7) J510 provides for connection of audio signals of “B” receiver.
(8) Two pairs of binding posts are provided. One set, labeled AUDIO, allows for connection of an additional receiver. The other is labeled either LINE or TEL/REMOTE and allows connection of a field telephone or switchboard.
b. Controls.
(1) INSTALLATION SWITCH. This is a screwd r i v e r a d j u s t m e n t . I n t h e R E T R A N S p o s i t i o n , radio relay operation is accomplished using the
C-2297/VRC provided in some radio installations. The
OTHER position is used to provide power and control signals when the intercom set is used with radios. The
INT ONLY position allows for dc power application through J508 when radios are not used with the intercom set.
(2) MAIN PWR switch. The OFF position removes dc power. The INT ONLY position applies dc power to the intercom circuits. The NORM position applies dc power to the intercom circuits and radio sets.
Figure 2-1. AM 1780/VRC jacks, controls, and indicator.
2-1
T M 11-5830-340-12
(3) POWER CKT BKR. The circuit breaker pro-
Vines overload protection for the intercom set and controls the dc power for the intercom and radio sets.
(4) INT ACCENT switch. When set to ON, the audio signals from the radios are reduced, making the intercom sound louder (accented).
(5) RADIO TRANS switch. In the LISTENING
SILENCE position, no one can key (transmit on) radios through the intercom set. When CDR ONLY is selected, only the crew commander can key the radios, and in CDR + CREW all crewmembers can key the radios connected to the intercom set.
c. POWER indicator. The lamp lights to show that power is applied when the POWER CKT BKR is ON.
2-2. Deleted.
Figure 2-2. C-2298/VRC jacks and control.
2-3. C-2298/VRC Jacks and Controls (fig. 2-2)
a. Jacks.
(1) J801 and J804 provide all power and control signals for the C-2298/VRC. They are wired in parallel so that one may be connected to the AM-1780/VRC and the other connected to another control box (tandem). When connected in tandem the control boxes operate independently.
2-2 Change 3
TM 11-5830-340-12
(2) J802 provides for connection of an audio accessory. This jack is used to talk and listen on either intercom or radios as selected by the MONITOR switch.
(3) J803 provides for connection of audio accessories. When this jack is used, talk and listen on the intercom is available, but the user can only listen to the radios. The MONITOR switch provides selection of the audio signals.
b. Controls.
(1) ,MONITOR switch. The MONITOR switch selects how the control box is used. In the ALL position, the user can talk and listen on the intercom, talk on the “A” receiver-transmitter, and listen to all items connected to the AM-1780/VRC. In the A position the user can talk and listen on the intercom and “A” receiver-transmitter. In the B position, the user can talk and listen on the intercom and “A” receivertransmitter plus listen to the “B” receiver. In the C position, the user can talk and listen on the intercom and “C” receiver-transmitter plus listen to the “C” receiver. In tank type vehicles, the C position may not function due to limited circuits in the vehicle slip ring assembly.
NOTE
Crewmembers (other than commander) cannot talk on radios when the intercom is keyed.
(2) VOLUME control.
The VOLUME control adjusts the level of the audio signals applied to the audio accessory jacks.
Figure 2-3. C-2297/VRC jacks, controls, and indicator.
2-4. C-2297/VRC Jacks, Controls and indicator
a. Jacks.
(1) J901 provides connection, through vehicle wiring, to a C-2296/VRC outside the vehicle.
(2) J904 provides connection of the C-2297/VRC to the AM-17801VRC for the passage of power and control voltages. This connection is sometimes made through vehicle wiring.
(3) J902 provides for the connection of an audio accessory. This jack is used to talk and listen on either intercom or radios as selected by the MONITOR switch.
(4) J903 provides for connection of an audio accessory. When this jack is used, talk and listen on the intercom is available, but the user can only listen to the radios. The MONITOR switch provides selection of the audio signals, b. Controls.
(1) MONITOR switch. The MONITOR switch s e l e c t s t h e u s e o f t h e C - 2 2 9 7 / V R C a n d t h e
C-2296/VRC. In the ALL position, the user can talk
2-3
TM 11-5830-340-12 and listen on the intercom, talk on the “A” receivertransmitter, and listen to all items connected to the
AM-1780/VRC. In the A position the user can talk and listen on the intercom and “A” receiver-transmitter. In the B position, the user can talk and listen on the intercom and “A” receiver-transmitter plus listen to the
“B” receiver. In the C position, the user can talk and listen on the intercom and “C” receiver-transmitter plus listen to the “C” receiver. In tank type vehicles the C position may not function due to limited circuits in the vehicle slip ring assembly.
NOTE
Crewmembers (other than commander) cannot talk on radios when the intercom is keyed.
(2) VOLUME control. The VOLUME control adjusts the level of the audio signals applied to the audio accessory jacks.
(3) SIG-EXT-OFF switch. The SIG position is spring loaded and causes an indicator lamp to light on both the C-22971VRC and the C-2296/VRC. The
EXT position connects the C-2296/VRC to the intercom through the C-2297/VRC. The OFF position disconnects the C-2 296/VRC from the intercom.
c. Indicator. The lamp on the C-2297/VRC lights when the SIG-EXT-OFF switch is in the SIG or EXT position, or when C-2296/VRC user presses the pushto-talk switch and the C-2297/VRC SIG-EXT-OFF switch is OFF.
2-5. C-2296/VRC, Jacks, Controls, Indicator, and H-207/VRC
a. General. The C-2296/VRC is installed in a waterproof box, outside the vehicle (usually tanks). It comes with an H-207/VRC attached. The C-2296/VRC must be connected to a C-2297/VRC (through vehicle wiring).
b. Jacks.
(1) J61 provides connection, in parallel, to the driver’s C-2297/VRC through vehicle wiring.
(2) J62 provides connection to the external signal lamp, attached to the waterproof box.
c. Controls,
(1) RAD TRANS-INT switch. Functions only if
C-2297/VRC has EXT selected. In the INT position the operator will monitor the audio selected by the driver’s C-2297/VRC, and may key the intercom. In the spring loaded RAD TRANS position, the operator may key the radio (selected by the driver).
(2) VOLUME control. Adjusts the loudness of the audio signal heard at the H-207/VRC.
(3) Key switch. The key switch on the H-207/VRC is used to key the radio or intercom set. It is also used to flash the light on the driver’s C-2297/VRC, if he has selected OFF on the SIG-E XT-OFF switch, by pressing and releasing the switch.
2 - 4
Figure 2-4. C-2296/VRC jacks, controls, and H-207/VRC.
TM 11-5830-340-12
2-6. C-10456VRC Jacks and Controls
a. General. The C-10456/VRC is a modified
C-2298/VRC designed for use in the Abrams Ml
Tank. It functions the same as the C-2298/VRC except it allows remote keying of the intercom or radio through a remote keying jack, J805. The remote keying jack, J805, is normally connected to the special keying cables in the Abrams Ml Tank. This disconnects the push-to-talk/release-to-listen function on the crewmembers audio accessory and enables special keying controls in the tank. When the dummy plug, P805, is connected to J805, the C-10456/VRC functions t h e s a m e a s , a n d i s i n t e r c h a n g e a b l e w i t h , t h e
C-2298/VRC.
b. T h e C - 1 0 4 5 6 / V R C i s u s e d o n l y w i t h a n
AM-1780/VRC.
2-7. Deleted.
Figure 2-5. C-10456/VRC jacks and controls,
Section Il. OPERATING PROCEDURES
2-8. Connections and Use of Audio Accessories The branched cable assembly is provided in some vehicular installations (SB 11-131). a. General. Typical audio accessories used with the
AN/VIC-l(V) and associated radios include a microphone (such as Microphone, Dynamic M-80/U; (fig.
2-6)), handsets (such as Handset H-189/GR or
H-250/U), headsets (such as Headsets H-140A/U and
H-250/U), headset-microphone (such as Headset-
Microphone H-161/U), DH-132Ahelmet (fig. 2-9) in which
an audio accessory similar to the H-161/U is installed, and a loudspeaker (such as Loudspeaker LS-454/U), with which Cable Assembly, Special Purpose, Electrical CX-7867/VRC of various lengths may be used as
an extension cord (fig. 2-7). In some AN/VIC-l(V)
installations, Cord Assembly, Electrical, Branched
CX-8650(*)/GR (fig. 2-6 and 2-8) maybe replaced by a
l o n g e r r e t r a c t i l e c o r d a s s e m b l y s u c h a s C o r d
Assembly, Electrical, Branched CX-10766/GR (25foot extension) or CX-10767/GR (35-foot extension).
b. Operating Terms. The following expressions which are used throughout the operating procedures are defined as follows:
(1) The expression “set the audio accessory switch to RADIO” or “key the radio” means to operate the nonlocking push-to-talk switch of the microphone or handset, or to operate the CVC helmet or headsetmicrophone switch to the nonlocking RADIO position.
While the switch is operated, the user talks with his lips close to the microphone; sidetone of the transmission is usually available. Received radio signals cannot be heard until the switch is released.
(2) The expression “set the audio accessory switch to off” means to release the push-to-talk switch of the microphone or handset, or t
O operate the DH-132A helmet or headset-microphone switch to center (lock-
Change 3 2 - 5
TM 11-5830-340-12 ing) position to hear received radio and intercom signals; or to await the reception of radio and intercom signals (standby operation) which can be heard in the center position without any action on the part of the user.
(3) The expression “set the audio accessory switch to INTERCOM” or “key the intercom” means to operate the microphone or handset push-to-talk switch, or to operate the CVC helmet or headsetmicrophone switch to the locking INTERCOM position. While in this position, the user talks with his lips close to the microphone; the received signals can be heard; sidetone of the transmission usually is available.
c. Audio Accessory Connections (fig. 2-10
(1) Insert the connector of the audio accessory into the audio accessory of the equipment with the flat surface in line with the jack key; push and twist the connector until it locks onto the jack.
(2) To facilitate connection and removal of the connector, put a light coating of insulating compound
(para 5-3a(2)) on the O-ring of the connector or damp-
en the O-ring before inserting it on the equipment jack.
d. Using Microphones and Handsets (fig. 2-10 and
2-1 1). Typical handset is provided with a dynamic mic-
rophone, earphone, and push-to-talk switch. Micro-
phone M-80/U (fig. 2-6) is provided with a microphone
and push-to-talk switch. Operation is accomplished by operating the push-to-talk switch and talking into the microphone with the lips close to the transmit element and releasing the switch to hear the reply. To use the microphone or handset, use the following connections as applicable.
( 1 ) T
O u s e t h e r e c e i v e r - t r a n s m i t t e r o r r
R-442 (*)/VRC in the radio system, connect the microphone or handset to the right jack of the control box
(RAD).
(2) To use the intercom circuit, connect the microphone or handset to the left jack, identified with a yellow band (INT), e. Using Loudspeaker and Headsets. The received audio signals are controlled to the desired listening level by adjustment of the equipment VOLUME control.
(1) Attach the LS-454/U and headsets to the
equipment jacks as shown in figures 2-10 and 2-11.
(2) Do not connect the LS-454/U or headsets to a
C-2299/VRC that is connected to the AM-1780/VRC
(fig, 4-8); the received radio signals are not available at
the C-2299/VRC connected to the AM-1780/VRC.
This restriction does not apply when the C-2299/VRC is connected directly to the radios.
2-6
TM 11-5830-340-12
2-8
Figure 2-7. Loudspeaker LS-454/U and extension cable CX-7867/VRC.
TM 11-5830-340-12 f. Using AVC Helmet and Headset-Microphone.
(1) The switch on these audio accessories has three position, as follows:
(a) The forward, nonlocking position (marked
RAD on H-161/U) identified as the “RADIO” position in these operating instructions. The position is used for radio transmission; the transmitter is keyed and sidetone of the transmission is heard.
(b) The rearward, locking position (marked ICS
(intercom system) on the H-161/U) is identified as the
“INTERCOM” position in these operating instructions. The position is used for intercom transmission; the intercom is keyed, sidetone of the transmission is heard, and intercom and radio signal can be heard.
(c) The locking, midposition disconnects the keying and microphone functions of the RADIO and
INTERCOM position of the switch, and permits radio and intercom signals to be heard,
Change 3 2-9
TM 11-5830-340-12
(3) On the C-2297/VRC, C-2298/VRC, and
C-2299/VRC, attach the audio accessory as shown in
figures 2-10 and 2-11. Set the switch as required as
explained in (1) above.
Figure 2-10. Typical connections of audio accessories to control boxes, radios not used.
CAUTION (2) Of the two audio plugs on the CVC helmet and headset-microphone, one is attached to a longer cord identified with a yellow band. This plug contains the keying control for the intercom circuit. The shorter cord and plug contain the keying control for the radio circuit, and the microphone and earphone circuits for both radio and intercom operation.
Observe the precaution on warning label DA
Label 132: WARNING: DO NOT START
VEHICLE WHILE RADIO IS ON. This precaution also applies when the AN/VIC-l (V) is used in the vehicle. The label, attached in an
“attention-arresting” location near the vehicle engine ignition switch, is issued in accordance with SB 11-624 (Warning Notice for Vehicles in Which Radios Are Mounted). Spraying or painting the label with clear lacquer or varnish will preserve the label.
2-10 Change 3
TM 11-5830-340-12
Figure 2-11. Typical connections of audio accessories to control boxes, with radio set.t
Change 3 2-11
TM 11-5830-340-12
g. Using DH-132A Helmels Connected to C-10456/VRC.
(1) If the dummy plug, P805, is installed on the remote keying jack of the C-10456/VRC, operation is as described in f above for the C-2298/VRC.
(2) If the remote switch in the vehicle is connected to the remote keying jack of the C-10456/VRC, put the switch on the DH-132A helmet in the rearward, locking position (marked ICS). The intercom or radio transmitter can not be keyed with the remote switch which is labeled RADIO/INT or is part of the driver’s steering control.
2-9. Operation of AN/VIC-l (V) for Radio and Intercom
Functions
a. AN/VZC-I(V) Used With Radio Systems. W h e n
radios are used with the AN/VIC-l(V) (fig. 4-7 through
4-10), detailed instructions for radio and intercom operation are provided in the following publications covering the indicated radio sets:
(1) When the AN/VIC-l(V) is used with Rad i o S e t s A N / V R C - 1 2 a n d A N / V R C - 4 3 t h r o u g h
AN/VRC-49, refer to TM 11-5820-401-10-2.
(2) When the AN/VIC-l(V) is used with Radio
Sets AN/VRC-53, AN/VRC-64, AN/GRC-125, and
AN/GRC-160, refer to TM 11-5820-498-12.
(3) When the AN/VIC-l(V) is used with the
AN/VSC-3, refer to TM 11-5815-332-15.
b. AN/VZC-l(V) Used Alone (Without Radio System)
(1) General. When one crewmember is keyed for talking on the intercom, all crewmembers hear the transmission, and sidetone is heard by the speaker.
When the MONITOR switch of any control box is set to INT ONLY, the intercom circuit will be keyed for communication with other crewmember control boxes.
When the user is not talking, vehicle noises are transmitted through the system to other crewmembers
if the DH-132A helmet or H-161/HR headset-microphone is connected and in the INTERCOM position. To prevent this, operate the audio accessory switch to
INTERCOM only when desiring to communicate with the crewmembers. The noise-cancelling circuit in the audio accessory microphone effectively cancels or reduces the outside noise provided the user speaks with lips close to the microphone.
(2) Starting procedure. Turn on AM-1780/VRC
(a) Set INSTALLATION switch to INT ONLY.
(The power cable must be connected to J508.)
(b) Set MAIN PWR switch to INT ONLY.
(c) Set POWER CKT BKR switch to ON. The
POWER indicator lamp should light. For blackout conditions, rotate the lamp cover one-eighth turn to the left.
(d) If the POWER CKT BKR switch springs back to OFF, an overload is present in the system. To reset the switch when it trips, reset it to ON. If the circuit breaker trips again, do not reset it; troubleshoot-
(e) The INT ACCENT and RAD TRANS switches may be set to any position; they do not function in intercom operation.
(3) Operating the C-2297/VRC and C-2298/VRC
(fig, 2-2 and 2-3). The following operational pro-
cedures apply to each C-22971VRC and C-22981VRC in the system.
(a) Set the MONITOR switch to INT ONLY.
(b) To stand by or to listen to calls from other crewmembers, set the audio accessory switch to OFF.
(c) To talk to other crewmembers, set the audio accessory switch to INTERCOM, talk into microphone, sidetone should be heard.
(4) Operating the C-2296/VRC (fig. 2-4). When the
the C-22961VRC is provided, a C-22971VRC is required. The C-22961VRC is mounted in a box on the outside of the vehicle. An external call light, used to attract the attention of personnel outside, is mounted to the box.
(a) Use the following procedures to attract the attention of C-2297/VRC and C-2296/VRC users:
1. To attract the attention of the C-2296/VRC user, operate the C-2297/VRC SIG-E XT-OFF switch to the spring-loaded SIG position a number of times.
The external call light at the C-2296/VRC should light each time the switch is operated.
2. To attract the attention of the C-2297/VRC user, o p e r a t e t h e p u s h - t o - t a l k s w i t c h o n t h e
H-207/VRC. The C-2297/VRC indicator light should light.
(b) T o e s t a b l i s h c o m m u n i c a t i o n b e t w e e n
C-2297/VRC and C-2296/VRC users, proceed as follows:
2. Set C-2297/VRC SIG-EXT-OFF switch to
EXT and the MONITOR switch to INT ONLY.
2. Set the audio accessory switch to IN-
TERCOM and talk to the H-207/VRC user.
3. At the C-2296/VRC, press the push-to-talk switch of the H-207/VRC and talk on the intercom to the crewmembers.
4, Under the conditions in 1 and 2 above, other crewmembers can talk on the intercom with the
C-2296/VRC user.
( c ) W h e n i n t e r c o m o p e r a t i o n f l r o m t h e
C-2296/VRC is no longer required, set the C-22971
VRC SIG-E XT-OFF switch to OFF. The C-2297/VRC i n d i c a t o r l a m p s h o u l d g o o u t i n d i c a t i n g t h e
C-2296/VRC is disconnected.
(d) When the LINE binding posts of the
2-12 Change 3
TM 11-5830-340-12
C-2296/VRC are connected to a field telephone (or the
AM-1780/VRC or C-2296/VRC of another vehicle), refer to c below for operating procedures.
(5] C10456/VRC Operation (fig, ,2-5). Controls
on the C-10456/VRC are identical to those on the
C-2298/VRC (fig. 2-2). If no remote switch is connect-
ed and the dummy plug is connected, operation is identical to the C-2298/VRC (para (3) above). If a remote switch is connected to the C- 10456/VRC, the following operational procedures apply:
(a.) Set the MONITOR switch to
INT ONLY
(or, if’ radio operation, to ALL, A, or B),
(b) Set the switch on the CVC helmet to
INTERCOM.
(c) To stand by or listen to calls from other crewmembers, leave the remote switch in the OFF position.
(d) To talk to other crewmembers, push the remote switch to INTER (com) and talk into the microphone, sidetone should be heard. For radio operation, set the remote switch to RAD.
c. Field Telephone and Intervehicle Operation, T o communicate with a user of field telephone connected to the AM-1780/VRC or C-2296/VRC, or to communicate with crewmembers of another vehicle when the
AM-1780/VRC or C-2296/VRC of both vehicles are interconnected, use the following operating procedures. Radio communication cannot be established with this arrangement, except by crew commander.
CAUTION
The ringing signal from a field telephone can damage the circuits in the AM-1780/VRC.
Thus, the telephone users must be advised that they cannot use the telephone ringer to attract the attention of vehicle crewmembers. To attract attention, whistle or talk into the telephone.
(1) When the lines are connected to the
C-2296/VRC, the C-2297/VRC SIG-EXT-OFF switch must be set to Ext.
(2) Set the MONITOR switch of the control boxes to ALL. Only the crew commander’s C-2298/VRC
MONITOR switch can be set to position C to communicate on this circuit.
(3) To talk to the other party, set the audio accessory switch to INTERCOM and talk; release the switch to hear the reply. The communication must be conducted on a push-to-talk, release-to-receive basis.
NOTE
If any other crewmember in the vehicle is keyed on intercom, the reply cannot be heard.
d. Stopping Procedures.
(1) To turn off the equipment when radios are associated with the AN/VIC-l (V), proceed as follows:
(a) On the AM-1780/VRC. set the POWER
CKT BKR to OFF.
(b) On the radios, set the POWER switch to
OFF.
(c) On the AM-1780/VRC, set the MAIN PWR switch to OFF.
(d) On the MS-7777 (*)/GRC, set the ON-OFF switch to OFF.
(2) To turn off the AN/VIC-l(V) when no radio is associated with it, set the AM-1780/VRC POWER
CKT BKR to OFF, the MAIN PWR switch to OFF, then the MS-7777(*) OFF.
2-10. Operational Check Procedures.
a. Before Mission. An operational check of the Intercommunications Set AN/VICV-l(V) should be done before starting any mission. These checks are to ensure proper operation of the intercom and should be performed with all assigned crewmembers at their stations.
b. After Maintenance. After any operator performed
maintenance procedure (para 3-5), the operational
check should be performed to ensure the problem was corrected and that no other malfunctions exist.
c. Procedures. The procedures below are for the
AN/VIC-l(V) installed without radios, such as the
M-109 Howitzer (SP). The procedure should be modified to fit the particular installation.
d. Sidetone. Each crewmember should hear sidetone of the transmission.
Change 1
2-13
TM 11-5830-340-12
e. AM-1780/VRC Initial Settings.
(1) Set the INSTALLATION switch to INT
ONLY.
(2) Set the MAIN PWR switch to INT ONLY.
(3) Set the PWR CKT BKR switch to ON.
( 4 ) T h e I N T A C C E N T a n d R A D T R A N S switches may be in any position.
f. Audio Accessories. Connect the audio accessories to the crewmember control boxes as shown in figures
g. Operational Check. P e r f o r m the intercommunications checks in the table below.
h. Installation With Radios. For AN/VIC-l (V) installations with radios, refer to the appropriate radio
TM for the operational check.
NOTE
If intercommunications cannot be established with any crewmember, refer to the operator
troubleshooting procedures, paragraph 3-4.
2-14
TM 11-5830-340-12
CHAPTER 3
OPERATOR MAINTENANCE INSTRUCTIONS
3-1. Scope of Operator Maintenance
Section 1. PREVENTIVE MAINTENANCE example, items 1 and 2 are only provided in some vehicle installations.
No special tools or test equipment are required for operator’s maintenance. Operator’s maintenance of the AN/VIC- 1(V) includes the following:
a. Preventive maintenance (para 3-2 and 3-3).
b. Troubleshooting (para 3-4 and 3-5).
NOTE
3-2. Preventive Maintenance, General
The PMCS procedures in table 3-1 are for
AN/VIC-l(V) installed in a vehicle in which no r a d i o i s c o n n e c t e d t o t h e A N / V I C - l ( V )
(fig. 4-4). For AN/VIC-l(V) connected to
radios, refer to the following publications for operator P M C S f o r indicated radio configurations.
Preventive maintenance is the systematic care, servicing, and inspection of equipment to prevent occurence of trouble, to reduce downtime, and to assure that the equipment is serviceable. Preventive maintenance checks and services (PMCS) defines the procedures to be performed at specific intervals and
under certain conditions (table 3-1).
a. Before you operate, perform your before (B) operation PMCS.
b, While you operate, perform your during (D) operation PMCS, The recording and reporting of your during (D) operation PMCS is done while performing the after (A) PMCS.
c. After you operate, perform you after (A) operation PMCS.
d. If the equipment was not used during the week, perform the (B), (D), and (A) PMCS together with the weekly (W) PMCS.
e. If the equipment fails to operate, try trouble-
shooting (para 3-4 and 3-5). If the equipment is
damaged, report it using the proper forms; see
DA Pam 738-7,50 for instructions.
f. The Item No. column in table 3- I shall be used as a source of item numbers for the TM number column on DA Form 2404 (Equipment Inspection and Maintenance Worksheet) in recording the results of the
PMCS.
g. If the equipment must he kept in constant operation, select those items that can be checked and serviced without disturbing operation. Make the complete checks and services when the equipment can be shut down.
h. Select those items to he inspected and serviced that are authorized for the vehicle installation, For
Radio configuration
Radio Sets AN/VRC-12,
AN/VRC-43 through
AN/VRC-49
Radio Sets AN/VRC-53,
–64, AN/GRC-125,
– 1 6 0
Publication
TM 11-5820 -401-10-2
(tracked vehicles)
TM 11-5820-498-12
i. Routine checks such as the following are not listed
NOTE
When indicated by visual inspection, perform the following:
Checking for frayed or damaged cables.
Checking and tightening loose nuts and bolts.
Change 3 3-1
TM 11-5830-340-12
Table 3-1, Operators preventive Maintenance Checks and Services (PMCS)
Item no.
1
2
3
4
5
6
NOTE
Within designated intervals, these checks are to be performed in the order listed.
B-Before
Interval
Item to be inspected
Shell: crewmember helmet
Earpieces and internal wiring: audio accessory
Switch assembly: audio accessory
Dust covers
Equipment operation
Telephone operation
D-During A-After
PROCEDURES
Check and have repaired or adjusted as necessary
Shell cracked; head assembly torn or separated from shell.
Earpieces not secured to shell; ear insulation padding damaged; internal wiring damaged.
Three positions are working
(center, locking, and nonlocking.)
Install dust covers (fig. 1-1 on
unused jack of AM-1780/
VRC, and crewmembers control boxes.
Check operation among crew-
If installed, check telephone
FOR READINESS
Reporting Equipment is not ready/auailable if.
Intercom is not able to be conducted among all crewmembers.
3-3. Cleaning Equipment
The exterior surfaces of the equipment should be clean: that is, there should be no dust, dirt, grease, oil, or fungus on the surfaces.
a. Remove dust and loose dirt with a clean cloth.
WARNING
Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE.
Prolonged breathing of vapor should be avoided. The solvent should not be used near heat or open flame; the products of decomp o s i t i o n a r e t o x i c a n d i r r i t a t i n g .
Since
TRICHLOROTRIFLUOROETHANE dissolves natural oils, prolonged contact with skin should be avoided. When necessary, use gloves which the solvent cannot penetrate. If the solvent is taken internally, consult a physician immediately.
b. Remove grease, oil, fungus, and ground-in dirt from equipment with a clean cloth dampened (not wet) with trichlorotrifluoroethane.
c. If the equipment is washed down using a water hose, do not direct the water directly at the front panels and cable connectors. Wipe the equipment dry after using the water hose.
Section II. OPERATOR TROUBLESHOOTING PROCEDURES
3-4. Troubleshooting by Visual Inspection a. Power Failure. If, during operation of the radiointercom equipment, the system seems to lose power, make the following checks:
(1) If the vehicle has a master switch, check to see that it is turned on.
(2) Check to see that the radio is pushed back fully on its mount and that the mounting clamps are tightened fully,
(3) When the CX-4720/VRC power cable is connected to the MX-7778/GRC, check to see that the
MX-7778(*)/GRC ON-OFF switch is set to ON, and that the cables connected to the MX-7778(*)/GRC and the radio mount are fully tightened to their jacks.
3-2
TM 11-5830-340-12
(4) Check to see that the POWER switch on the radio is turned on. Check to see that the
AM-1780/VRC MAIN PWR switch is set to NORM.
Also check to see that the AM-1780/VRC INSTAL-
LATION SWITCH is set to OTHER. When the
AM-1780/VRC POWER CKT BKR is set to ON, the
POWER indicator should light.
b. Radio Communication Failures. For radio equipment failures, refer to TM 11-5820 -401-10-2 for
AN/VRC-12 series radios; to TM 11-5820-498-12 for
A N / V R C - 5 3 , A N / V R C - 6 4 , A N / G R C - 1 2 5 , a n d
AN/GRC-160 radios; and to TM 11-5815-332-15 for the radio set in the AN/VSC-3.
c. Failures While Using Radio-Intercom System.
When radio or intercom communication failures occur while using audio accessories connected to the control boxes of the radio-intercom system, make the following checks:
(1) Check to see that the audio accessory cable plugs are locked on the control box jacks.
(2) Note that radio communication from all control boxes will be broken if another crewmember keys on the intercom circuit. However, radio communication from the crew commander’s control box (always connected to J504 of the AM-1780/VRC) is not interr u p t e d w h e n a n o t h e r c r e w m e m b e r k e y s o n t h e intercom.
(3) Check to see that the POWER indicator on the
AM-1780/VRC is lighted. If not, set POWER CKT
BKR switch to ON.
(4) If the C-2297/VRC or C-2298/VRC fails while the turret is being turned, the turret slip rings may be
All references to C-2298/VRC apply also to C-10456/VRC (see para c below for
C-10456/VRC troubleshooting.) at fault. To restore communication on a temporary basis until the vehicle slip rings are repaired:
(a) C o n n e c t a C X - 4 7 2 3 / V R C , o f s u i t a b l e length, between the driver’s control box and one of the unused jacks on the AM- 1780/VRC. If there is no available jack, connect the cable to the unused jack of a C-2298/VRC in the vehicle. Operation of both control boxes are independent of each other. Run the cable in a convenient manner and tie it at appropriate points to the vehicle.
(b) Or an extension cable, replacing the retractile cable of the CVC helmet or H-161/U may be used. Such extension cables include Cord Assembly,
E l e c t r i c a l , B r a n c h e d C X - 1 0 7 6 6 / G R a n d C o r d ,
Assembly, Electrical, Branched CX-10767/GR. Connect the extension cable between the driver’s audio accessory and a C-2298/VRC in the vehicle.
(5) If the C-2296/VRC is inoperative, check the cabling between t h e C - 2 2 9 6 / V R C a n d t h e
C-2297/VRC for damage.
(6) For radio failures, see b above.
(7) Refer to paragraph 3-5 to troubleshoot the
radio-intercom system.
3-5. procedures for Operator to Troubleshoot
Radio-Intercom System
a. General. The troubleshooting procedures in b below cover the AN/VIC-l(V), the audio accessories, and cabling in the radio-intercom system. Also included are procedures for troubleshooting the
C - 2 2 9 9 / V R C t h a t m a y b e c o n n e c t e d t o t h e
AM-1780/VRC (items 7 and 8, b, below). When the corrective measures indicated do not clear the trouble, higher maintenance level troubleshooting is required.
b. Troubleshooting Radio-Intercom Svstem
Item no.
Symptom
1 Unable to communicate on intercom or radio.
NOTE
Probable causes
a. Power is turned off.
Corrective measures
a. On AM-178/VRC, the POWER indicator should be lighted. If not check the following:
(1) On the AM-1780/VRC, open
POWER indicator lens; set
POWER CKT BKR switch to ON,
MAIN PWR switch to NORM, and
INSTALLATION SWITCH to
OTHER.
(2) If POWER indicator is still not lighted, set POWER switch on receiver-transmitter connected to
J501 of AM-1780/VRC to LOW or
HIGH. The dial lamp in receivertransmitter should be able to be keyed, and sound should be heard from its receiver. These signs indicate power is available to
Change 3 3-3
TM 11-5830-340-12
Item no.
2
3
4
5
Symptom Probable causes Corrective measures
Unable to communicate on intercom or radio from one of the control boxes
(other than C-2296/VRC).
Unable to communicate on any radio from any control box; intercom operation is satisfactory.
Unable to communicate from driver’s
C2297/VRC or C-2298/VRC; other control boxes operate satisfactorily.
Unable to communicate from
C-2296/VRC (C-2297/VRC is satisfactory.
b. Loose cable connections
c. Defective AM-1780/VRC
a. Audio accessory defective or connected incorrectly.
b. Loose cable connections
c. Defective control box or cable a.
b.
c.
e.
a.
Some crewmember’s audio accessory is keyed on intercom or is defective.
d.
RAD TRANS switch AM-1780/VRC is set to LISTENING SILENCE.
b.
a.
b.
Audio accessory defective or connected incorrectly.
MONITOR switch is not set correctly.
Defective radio
Loose cable connections
Defective vehicle wiring
Switches are not set properly on
C-2297/VRC.
Loose cable connections b.
c.
a.
b.
c.
a.
b.
c.
operate the radio and radio- intercom systems.
(3) If the receiver-transmitter does not exhibit above signs, refer to
Tighten cable connections at J501 of
AM-1780/VRC and at MT-1029/VRC.
Higher maintenance level troubleshooting is required.
Perform the following:
(1) Substitute the original audio accessory with one known to be good.
(2) Connect the original audio accessory to another control box and check it for operation.
(3) Refer to paragraph 2-8 instruc-
tions on the use of audio accessories.
Tighten cable connections at the control box cable jack, the vehicle outlets, and the AM-1780/VRC.
Higher maintenance level troubleshooting is required.
Perform the following:
(1) Check other crewmembers’ audio accessories to see that one is not set to INTERCOM.
(2) Disconnect plugs of the audio accessory of each crewmember, in turn, from the control box.
Perform corrective measures in item
2a above.
Set MONITOR switch to ALL or A to communicate on one receivertransmitter; to C to communicate on second receiver-transmitter; to B to hear signals from one R-442(*)/VRC; and to C to hear signals from second
R-442(*)/VRC.
d.
e.
a.
b.
a.
b
Set switch to CDR+CREW or CDR
ONLY, if authorized, to enable crewmembers or crew commander, respectively, to use receiver-transmitter.
Perform the following:
(1) Tighten cable connection at left jack of the control box and at vehicle jack.
(2) Tighten cable connection at
AM-1780/VRC and at vehicle jack.
Higher maintenance level troubleshooting required.
Set C-2297/VRC MONITOR switch to some position other than C, and set
SIG-E XT-OFF switch to EXT;
C-2297/VRC indicator lamp should light.
Perform the following:
(1) Tighten at right jack of
3-4
TM 11-5830-340-12
(Refer to TM 11-5820-401-20-2).
remote keying jack (fig. 2-5).
Change 4 3-5/(3-6 blank)
TM 11-5830-340-12
CHAPTER 4
INSTALLATION
Section 1. GENERAL
4-1. Service Upon Receipt of Equipment
When packed for shipment, the components of the
AN/VIC-l(V) are packed in a single package (para
l-8a) or are part of the installation kit package (para
1-8c). When required, the cartons are packed in
wooden boxes.
c. Shelter Requirements, The components of the
AN/VIC-1(V) are rugged and weatherproof units that can withstand extremes of cold and heat. Accordingly, no particular protective requirements are applicable,
4-2. Nonvehicular Installations a. Unpacking. If provided, open the wooden boxes; remove the contents from the cartons.
b. Checking Equipment,
(1) Inspect the equipment for possible damage.
Report damaged equipment on SF 364 (Report of Dis-
(2) Use the packing list to check the contents of the carton.
(3) Report shortages on SF 361 (Discrepancy in
a. When the AN/VIC-1(V) is not used in a vehicle, a general purpose i n s t a l l a t i o n k i t i s a v a i l a b l e
(SB 11-131). It is Installation Kit, Electronic
E q u i p m e n t M K - 1 4 5 3 / V I C - 1 ( V ) . I t i n c l u d e s t h e
AM-1780/VRC, four C-2298/VRCs, H-161A/U, interconnecting and power cables, and instructions for installing the equipment.
b. A dc power supply, such as Power Supply
PP-2953(*)/U, capable of supplying 22 to 30 volts dc at approximately 1 ampere is required.
Section II. INSTALLATION PROCEDURES
4-3. Installing AN/VI C-l (V) a. General.
(1) For wheeled Vehicles (para 1-12a), installation
instructions for mounting the AN/VIC-1(V) and the parts of the installation kit are provided in the installation kits.
(2) For tracked vehicles (para 1-12c), the
AN/VIC-l(V), and the mounts for the radios, if applicable, are part of the vchicle installation equipment
harness (para 1-12a(2)). The prescribed layout and
cabling details are provided in the publication covering the vehicle in which the harness is installed. Instruc-
tions for installing the accessory kit components (para
1- 12a(3)) are provided in the accessory kit.
b. Cabling, Refer to paragraph 4-5 for general
cabling instructions.
c. Determining Position of Power Control Link in
Radio Mounts, When the AN/VIC-1(V) is used with
radio sets in the vehicle (fig. 4-7, 4-8, and 4-9), the
position of the power control link in the radio mounts is usually set so that the AM-1780/VRC MAIN PWR switch becomes the main power control for the radio and radio-intercom systems,
(1) When the AN/VIC-l(V) is used with one of the
radio sets of the AN/VRC-12 series (para l-6a; fig. 4-7
and 4-8), the procedures for setting the power control link in the radio mounts is provided in
TM 11-5820-401-20-2.
(2) When the AN/VIC-l(V) is used with Radio
Sets AN/VRC-53, AN/VRC-64, AN/GRC-125, or
AN/GRC-160 (fig. 4-9), the procedures are provided in
TM 11-5820-498-12.
4-4. AN/VIC-l(V), General Removal and Replacement procedures
a. Removal. As a general rule, when an item is removed, replace the mounting screws with its lock washers and nut in place in the mounting bracket or screw hole. Retain the cable straps and screws that hold the cables in the same way.
(1) To remove a cable connector, refer to the
general instructions in paragraph 4-5.
(2) To remove equipment, loosen the equipment mounting screws and remove the unit from its mounting, b. Replacement.
(1) Attach the equipment to its assigned mounting bracket. Use the prescribed mounting screws, lock washers, and nuts. Make sure one lock washer is under the head of the screw and another under the nut.
(2) Attach the cable plug to the equipment jack
c. Dust Covers. Install dust covers (fig. 1-1) on
unused equipment jacks. This will prevent dirt and moisture from impairing the circuits connected to the jacks.
4-1
TM 11-5830-340-12
4-5. General Cabling Instructions
Refer to paragraph 1-12 for general discussion con-
cerning equipment required to make the AN/VIC-l(V) operational.
a. Identifying Cable Connectors. To identify the cable plugs with the equipment jack to which they are attached, inscribe the equipment jack reference designation on a tag, label, or decal and attach it to the plug. A set of decals containing equipment jack designations (J501, J509, J71, etc.) is available. The set is identified as a marking set in SB 11-131. Attach the proper label to the neck of each cable plug while it is attached to the equipment jack.
b. Connecting Cables.
(1) Before connecting a cable to the equipment jack, observe the following:
(a) Check to see that the connector pins are straight; straighten them if necessary.
(b) Check to see that the locknuts of both sides of the plug are tight; tighten them if necessary (fig.
(c) Check to see that the wing nuts on the plug
are tight; tighten them if necessary (fig. 4-2).
(d) Replace the cable when the insulation is damaged or the insulation has come loose from the
gland nut in the connector (fig. 5-1).
(2) To attach the cable plug to the equipment jack, raise the wing nut, position the plug at the angle that permits the keyway in the plug to slip into the key in the jack, then press the cable connector into the jack. Rotate the wing nut to lock the plug to the jack, and lower the wing nut.
(3) Route the cable to the assigned equipment jack,
(a) Follow the route prescribed in the installation instructions.
(b) Make sure there is no slack in the cable between the cable clamp points. Check to see that the cable clamps grip the cable securely and that the screws and lock washers holding the clamps are tight.
(4) The following information applies to the
AM-1780/VRC and the equipment associated with it (fig. 4-4
through 4-10).
NOTE
When the C-10456/VRC is installed in the combat vehicle, all references to C-2298/VRC in the following procedures apply to the C-10456/VRC.
Connect the cable from the remote hand or foot switch in the vehicle to the keying control jack in the vehicle to the keying control jack located behind the VOLUME control
(a) The cable from the commander’s control box must be attached to jack J504 on the
AM-1780/VRC. This arrangement is required to ensure that the commander can assume control of the radio circuits thus overriding control of the system by other crewmembers using the intercom system.
CAUTION
The cable connection from the MT-1029/VRC of radio “A” must be attached to J501 of the
AM-1780/VRC if radios are used. If attached to other jacks, the AM-1780/VRC circuit components may be damaged. If radios are not used, power should be connected to J508 and the AM-1780/VRC INSTALLATION
SWITCH set to INT ONLY.
(b) The cables to the AM-1780/VRC from the crewmember c o n t r o l b o x e s ( C - 2 2 9 8 / V R C a n d
C-2297/VRC) can be connected indiscriminately to the jacks (J505, J506, and ,J507) on the top of the
AM-1780/VRC,
(c) In some vehicles, the connection from the driver’s C-2297/VRC or C-2298/VRC is provided by d i r e c t c a b l e c o n n e c t i o n u s i n g c a b l e a s s e m b l y
CX-4723/VRC. In other vehicles, the connection is made by other cable types to the vehicle wiring system.
When connection is made through vehicle wiring, the cables on both sides of the vehicle wiring must be the same (CX-7060/VRC on each side or CX-9640 on each side).
NOTE
The CX-9640 MUST be used in the M-109 S.P.
Howitzer installation.
(d) The cable connections to the C-2298/VRCs can be made to either the left or right jack.
(e) One or more C-2298/VRCs can be connected to a C-2298/VRC that is connected to the
AM-1780/VRC, u s i n g C X - 4 7 3 2 / V R C s f o r t h e purpose. All C-2298/VRCs operate independently of each other when so connected.
(f) If the C-2299/VRC is used, the left jack,
J701, must be connected to J511 of the
AM-1780/VRC; J702 must be connected to J509 on the AM-1780/VRC.
(g) In some tank installations, a branched cable, connected on one end to the commander’s
C-2298/VRC, is terminated in two jacks in the cupola t o w h i c h t h e c o m m a n d e r ’ s a u d i o a c c e s s o r y i s connected.
( h ) C o n t r o l b o x C - 1 0 4 5 6 / V R C c a n b e recognized from the C-2298/VRC control box, by the additional jack located behind the VOLUME control.
(i) To use control box C-10456/VRC in a nonremote keying situation, secure the remote keying dummy plug on the remote keying jack, J805. System operation is now identical to that of the AN/VIC-l(V)
Change 3 4-3
TM 11-5830-340-12 using control box C-2298/VRC.
(j) To secure remote keying cables and dummy plug on remote keying jack of the C-10456/VRC perform the following.
1. Aline key of dummy plug or remote keying cable connector with keyway of jack.
2. Insert dummy plug or cable connector into jack.
3. Turn outer ring to the right (clockwise), while applying light pressure to the cable connector or dummy plug, until it locks into place.
(k) To remove the dummy plug or cable connector from remote keying jack perform the following.
1. Turn outer ring to the left (counterclockwise).
2. Pull connector out of keyway.
c. Field Telephones and Intervehicle Connections.
Operation under the arrangements in (1) and (2) below
(1) Field telephone connections. A field telephone can be connected to the intercom circuits of the
AN/VIC-l(V) to enable the telephone user to communicate with the crewmembers. Connect the wires from the field telephone to the LINE (or TEL/
REMOTE) binding posts of the AM-1780/VRC or the
LINE binding posts of the C-2296/VRC (fig. 4-4
through 4-10).
(2) Intervehicle connections. The intercom circuits cuits of different vehicles can be interconnected to enable the crewmembers to communicate with each other. This is accomplished by connecting the field wires between the LINE (or TEL/REMOTE) binding posts of the AM-1780/VRC or C-2296/VRC of one vehicle with the AM-1780/VRC or C-2296/VRC of another vehicle.
d. Cabling Diagrams,
(1) Figures 4-4 and 4-5 show typical cabling of
AN/VIC-l(V) when it is not used in conjunction with
(2) Figure 4-7 through 4-10 show cabling of
ANWIC-l(V) when it is used in conduction with radio
e. Cabling Details.
(1) Figure 4-2 shows cabling details for the
AM-1780/VRC pointing out proper cable angles.
(2) Figure 4-3 shows cabling details for control
boxes, pointing out proper cable angles.
4-4
Figure 4-2. AM-I780/VRC cabling details, shown in “with radio” configuration.
EL2DT013
TM 11-5830-340-12
EL2DT014
Figure 4-3. Control box cabling details
4-5
TM 11-5830-340-12
4-8
Figure 4-6, Filter, Dc Power F-146/VRC and schematic diagram.
EL2DT025
TM 11-5830-340-12
4-6.
Cable Assemblies CX-4720/VRC and
CX-13089/VRC (fig. 4-11) provide connection be-
tween the dc power source and the AM-1780/VRC
(fig. 4-4 and 4-5), or between the dc power source and
the MT-1029/VRC when the radio equipment is used
with the AN/VC-1(V) (fig. 4-7 through 4-10). The
power cables are available in various lengths depending on the distance between the power outlet and the equipment.
a. Attaching Terminal Lugs and Bendix Connector to
CX-4720/VRC. Depending on the vehicle in which the equipment is used, either terminal lugs ((1) below) or a
Bendix connector ((2) below) is attached to the
CX-4720/VRC.
(1) Terminal lugs. In installations in which the power cable is connected directly to the vehicle battery, terminal lugs are soldered to cable conductors. The lugs are issued with the installation kit for the vehicle and are sometimes supplied with
MT-1029/VRC.
NOTE
In order to identify the CX-4720/VRC wire conductors, attach a label permanently to each
conductor (fig. 4-12). Use either battery cable
lead labels made for this purpose or TY-RAP cable ties marked with the letters POS and
NEG. The black-green pair is the negative and the red-white pair is positive. The positive lug is larger than the negative lug.
(2) Bendix connector. In vehicles in which dc power is available from a 3-pin receptacle, or from
Suppressor, Electrical Transient MX-7778/VRC, the
CX-4720/VRC or CX-13089/VRC is attached to the vehicle Bendix receptacle.
Figure 4- 11.
Change 4 4-13
TM 11-5830-340-12 when working near battery. Otherwise, you may cause an explosion injuring yourself and others.
4. When the cable is provided with terminal
lugs (A, fig. 4-11), attach the cable lugs to the battery
terminals as shown in figure 4-12.
MAIN PWR switch to OFF (fig. 2-l). Also,
(1) Installation.
(a) When the AN/VIC-l(V) is used alone (fig.
4-4), attach the CX-4720/VRC (or CX-13089/VRC) to
J508 on the AM-1780/VRC.
(b) When the AN/WC-l(V) is used with the radio
system (fig. 4-7 through 4-l0), the
CX-4720/VRC (or CX-13089/VRC) is connected to
J21 of the MT-1029/VRC. The dc power is applied through the MT-1029/VRC jack J22 and the
CX-4723/VRC to J501 on the AM-1780/VRC for use both by the AN/VIC-1(V) intercom set and the radio set(s). To install the dc power cable (CX-4720/VRC or
CX-13089/VRC) use the procedures in 1 through 5 below.
NOTE
All references to “dc power cable” apply to
CX-4720/VRC and CX-13089/VRC in the following procedures.
1. Separate the top tray of the MT-1029/VRC
left jack J21 (fig. 4-7). If applicable, connect the
CX-4723/VRC to J22 and the other dc power cable,
CX-4721/VRC, to J23. Route each cable between the top tray and the base assembly in such a way that it follows the cable route to the next equipment.
2. Reinstall the top tray on the base assembly.
3. Route the cable to the equipment use the prescribed route, insulators, and cable clamps that are provided.
WARNING
Vehicle battery can give off explosive gas,
Don’t smoke and be careful to avoid sparks
CAUTION
Reversing the polarity of the damage the AM-1780/VRC.
5. When the cable is provided with the Bendix
connector (B, fig. 4-11), connect the plug section to the
vehicle dc power outlet or the MX-7778(*)/GRC, and tighten the locknut.
(2) Removal.
(a) When the AN/VIC-l(V) is used alone
(without radio system), disconnect the dc power cable
from J508 on the AM- 1780/VRC (fig. 4-4).
(b) When the AN/VIC-l(V) is used with radio system, use the procedures in 1 or 2 below.
1. Separate the top tray of the MT-1029/VRC from its base assembly and disconnect the dc power cable from the jack (J21). If required, disconnect other cables from the radio mount receptacles. Replace the top tray on the base assembly.
WARNING cable lugs will
Vehicle battery can give off explosive gas.
Don’t smoke and be careful to avoid sparks when working near battery. Otherwise, you may cause an explosion injuring yourself and others.
2. Disconnect the other end of the dc power
cable from the battery terminals (fig. 4-12); be sure to
tighten the nuts on the battery clamps after removal of the dc power cable. If the cable is connected to the vehicle dc power outlet or the MX-7778(*)/GRC, loosen the locknut on the Bendix connector and remove the connector from the outlet.
4-14
TM 11-5830-340-12
Figure 4-12 Connecting CX-4720/VCR to vehicle battery.
4-1 5/(4-1 6 blank)
TM 11-5830-340-12
CHAPTER 5
ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section CI PREVENTIVE MAINTENANCE
5-1. Scope of Organizational Maintenance Radio configuration
a. Organizational maintenance of the AN/VIC-l(V) includes the following:
(1) Preventive maintenance checks and services
(2) Lubricating parts (para 5-3) and touchup painting (para 5-4).
(3) Troubleshooting (para 5-9) and maintenance
b. Tool Kit, Electronic Equipment TK-101/G is required for tools to install and replace equipment.
Radio Sets AN/VRC-12, AN/VRC-43 through AN/VRC-49
Radio Sets AN/VRC-53, AN/VRC-64
AN/GRC - 1 25, and AN/GRC - 160
Publication
TM 11 -5820-401-20-2
TM 11-5820 -498-1 2
e. Routine checks, such as cleaning (para 3-3),
checking for frayed or damaged cables, stowing items not in use, checking for loose nuts and bolts etc., are not listed in the PMCS chart. These are things you should do anytime you see they must be done.
5-3. Using Lubricants on Connecting Surfaces
5-2. Preventive Maintenance, General
Preventive maintenance is the systematic care, servicing, and inspection of equipment to prevent occurrence of trouble, to reduce downtime, and to assure that the equipment is serviceable. Preventive maintenance checks and services (PMCS) defines the procedures to be performed at specific intervals and under certain conditions. Organizational PMCS is performed on a monthly and quarterly schedule (table
a. If the e q u i p m e n t f a i l s t o o p e r a t e , t r y
troubleshooting (para 5-9). Refer to DA Pam 738-750
for forms and records to be used for troubleshooting and for recording, scheduling, and reporting PMCS.
b. If the equipment must be kept in constant operation, select those items that can be checked and serviced without disturbing operation. Make the complete checks and services when the equipment can be shut down.
c. Select those items to be inspected that are authorized for the vehicle installation.
d. The Item no. in table 5-1 shall be used as a source
of item numbers for the TM number column on DA
Form 2404 (Equipment Inspection and Maintenance
Worksheet) in recording the results of the PMCS.
There are two kinds of lubricants that can be used on the mating surfaces of the equipment. One is used on the radio whip antenna sections to prevent them from seizing; the other is used on surfaces of preformed packing in the covers of equipment and the O-rings on connectors (b below).
a. Lubricants. Following are typical lubricants that can be used.
(1) Grease, Graphite. This is used on radio whip antenna sections.
(2) Insulating Silicone Compound, used on Orings, preformed packing, and gaskets (b below).
b. Lubricating O-rings, Preformed Packing and
Gaskets.
(1) Typical example of O-ring is found in audio
accessory cable connectors (fig. 5-l).
(2) Typical examples of preformed packing are found embedded in the covers of the control boxes and radios. Gaskets used in the installation may also be coated with the insulating silicone compound.
CAUTION
Do not let the insulating silicone compound touch electrical contacts or surfaces.
NOTE
The PMCS procedures in table 5-1 are for the
AN/VIC-l (V) installed in a vehicle in which no radio is connected to the AN/VIC-1(V). For
AN/VIC-l(V) connected to radio, refer to the following publications for organizational
PMCS for indicated radio configurations:
(3) Clean the surface and apply a thin film of insulating silicone compound, item a(2) above.
5-4. Painting
Remove rust and corrosion from metal surfaces by lightly sanding them with fine sandpaper. Brush two thin coats of paint on the bare metal to protect it from further corrosion. Refer to applicable painting and refinishing instructions given in SB 11-573 and TB
43-0118.
5-1
TM 11-5830-340-12
Table 5-l. Organizational Preventive Maintenance Checks and Services
M–Monthly Q-Quarterly
5-2
Figure 5-1. Details of cable connectors.
TM 11-5830-340-12
5-5. General a. When troubleshooting procedures identify a piece of equipment as defective, it is either replaced at the organizational maintenance facilities or referred to higher maintenance level for repair.
b. The following equipment is required to troubleshoot and repair the equipment.
(1) Tool Kit, Electronic Equipment TK-101/G.
(2) Multimeter AN/URM-105 (TM 11-6625-
203-12).
Section Il. TROUBLESHOOTING AND MAINTENANCE normal (expected) results, and a remarks column.
(3) When normal indications are observed, proceed to the next step or follow the how to proceed instructions.
(4) When abnormal indications are observed, the step will either state a faulty item of equipment or refer you to a troubleshooting flow chart, by number,
These charts are contained in paragraph 5-9.
(5) Observe all WARNINGS and CAUTIONS as they appear throughout the procedures.
5-6. Troubleshooting the Intercom kt
a. General. The procedures used in this chapter are used to check the operation and troubleshoot the intercom set without radios. For radio-intercom systems
(radios installed) refer to ‘TM 11-5820-401 -20-2 for radio-intercom system using AN/VRC-12 series radios or TM 11-5820-498-12 for radio-intercom system using AN/VRC-64 or AN/GRC-160 series radios.
(1) Before proceeding, perform the checks and corrective measures in the operator’s troubleshooting
procedures (para 3-4 and 3-5),
(2) Refer, to figure 4-1 when troubleshooting cable
assemblies.
(3) Refer to figures FO-1 and FO-2 for power and
signal distribution circuits of the radio-intercom system.
(4) Simplified block diagrams are provided throughout the troubleshooting flow charts.
(5) Repair information is contained in paragraph
b. Toubleshooting the Intercom Set. The troubleshooting procedures listed herein cannot be allinclusive. The methods used below may be altered to fit the configuration concerned. The troubleshooting procedure contains two parts, an operational check (c
below) and troubleshooting flow charts, paragraph 5-9.
The operational check is normally done with the equipment installed in the vehicle. As a minimum, it is performed as part of the scheduled preventive maintenance checks and services (PMCS). After repairs, the operational check, or the appropriate portion of it, should be performed to ensure that the malfunction has been corrected and that no other malfunction exists.
(1) The operational check first lists preparatory actions that, when done, establish a starting condition for the equipment performance checklist (EPC) that follows.
(2) The equipment performance checklist contains detailed steps consisting of a procedure to follow,
c. Operational Check, Follow the procedures below in the sequence given.
(1) Initial Adjustments. (Perform as applicable.)
OFF (hull and turret).
on can cause components.
WARNING
To safeguard against electrical shock and possible damage to equipment, remove or tape all personal exposed metal objects such as watches, rings, and medallions.
(a) Set vehicle MASTER POWER switches
(b) Set MX-7777(*) circuit breaker and
BATTLE OVERRIDE switches OFF.
(c) Set AM-1780/VRC MAIN PWR and POWER
CKT BKR switches to OFF.
CAUTION
Do not start vehicle engine with any communication equipment turned on. Make certain that all communications components that have POWER switches are turned OFF. Starting a vehicle with communication equipment serious damage to its
(2) Refer to the appropriate TM and ensure that all items of equipment for the intercom set are properly installed, and that the cables are properly routed and connected.
(3) Start vehicle and set MASTER POWER switches ON.
(4) Set AM-1780/VRC INSTALLATION SWITCH to INT ONLY.
(5) Set RADIO TRANS switch to LISTENING
SILENCE.
(6) Set INTACCENT switch to OFF.
(7) Open POWER lamp lens cover by turning lens cover counterclockwise to stop, then 1/8 turn clockwise.
Change 3
5-3
TM 11-5830-340-12
CAUTION
The POWER lamp socket may become loose and rotate in the AM-1780/VRC housing, causing an adverse short. Do not operate the equipment when this receptacle is loose.
(8) Set the C-2297/VRC (if included, at the driver’s position) as follows:
(a) SIG-EXT-OFF switch to OFF
(b) Open lamp lens cover by turning lens collar counterclockwise to stop, then clockwise 1/8 turn.
CAUTION
The lamp socket may become loose and rotate in the C-2297/VRC housing causing an adverse short. Do not operate the equipment if this receptacle is loose.
(9) Check the operation of the H-189/U as shown.
To circuit disturb, set the multimeter up as an ohmmeter, RX1O, and connect the negative lead to chassis ground. Touch the positive lead to the test point several times. A clicking sound should be heard each time the test point is touched.
MICROPHONE ELEMENT
EL2DT028
Figure 5-2. H-189/U Handset,
(a) Phone Element Check Circuit disturb (para
5-6c(9) above) between pin A and B of handset’s audio
plug. A clicking sound should be heard from phone element.
(b) Keying Check. Connect meter ‘leads between pin A and C of handset’s audio plug. With handset’s push-to-talk switch held in, meter should show zero ohms. With handset’s push-to-talk switch released, meter should show infinity (00) ohms.
(c) Microphone Element Check. Connect meter leads between pin A and pin D of handset’s audio plug.
While listening to microphone element, press and release handset’s push-to-talk switch several times. A clicking sound should be heard from microphone element,
NOTE
Before connecting cables and audio accessories to components of the intercom set, make sure that all plug and jack contacts or pins are clean and undamaged. After connection, ensure that the connection is tight.
(10) Perform the Equipment Performance Checklist below.
5-4 Change 3
TM 11-5830-340-12
5-7. Equipment Performance Checklist
NOTE
If the MX-7777A is installed, the BATTLE OVERRIDE switch should remain in the OFF (closed hood) position.
Remarks
If lamps do not light, report condition to supervisor.
If circuit breaker trips, refer t
Q
troubleshooting chart, figure 5-3.
If POWER lamp lights, replace
AM-1780/VRC.
a.
If POWER lamp does not light, refer b.
to troubleshooting chart, figure 5-4.
If POWER CKT BKR trips OFF,
refer to troubleshooting chart, figure
5-5.
a.
b.
c.
d
If in any switch position the relaya do not click and no sidetone is heard,
refer to troubleshooting chart, figure
5-7.
If in any switch position relays do not click, but sidetone is heard, refer to
troubleshooting chart, figure 5-8.
If in all switch positions relays click but no sidetone is heard, refer to
troubleshooting chart, figure 5-10.
If in a particular switch position relays click but no sidetone is heard, refer to
troubleshooting chart, figure 5-11.
If normal indications are not obtained,
I replace commander’s control box.
If there is only a driver’s control box left in the installation go to step 18 at this time.
a. If in any position relays do not click and no sidetone is heard, refer to
troubleshooting chart, figure 5-7.
b. If in any position relays do not click but sidetone is heard, refer to touble-
c. If in all positions relays click but no sidetone is heard, refer to trouble-
d. If in a particular position relays click but no sidetone is heard, refer to
troubleshooting chart, figure 5-11.
Change 4 5-5
TM 11-5830-340-12
29.
30.
31.
32.
33.
5-7. Equipment Performance Checklist- Continued
Step
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
34.
Procedure
Move handset from J803 to J802 of the same control box.
Set MONITOR switch to INT ONLY,
Key handset and talk into microphone, then unkey handset.
Repeat steps 11 through 16 for each crewmember’s (not driver’s) control box.
Then go to step 18,
Connect the handset to J803 orJ903
(yellow band) of the driver’s control box.
Turn VOLUME control fully clockwise.
If driver’s control box is C-2297/VRC, set the SIG-EXT-OFF switch to OFF.
One at a time, for each position of the
MONITOR switch listed, key handset and talk into the microphone, then unkey the handset:
ALL
A
INT ONLY
B heard.
Normal indication
AM-1780/VRC relays should click and sidetone should be heard.
NOTE
In the M-109 S.P. Howitzer, the circuit for driver’s earphone is only complete when driver’s
C-2298 is in the ALLposition, due to vehicle wiring.
For each position of the MONITOR switch, relays in the AM-1780/VRC should click and sidetone should be
NOTE
Sidetonc will not be heard on positions A and B in Ml and
M1A1 tanks.
Remarks
If normal indications are not obtained, replace the control box.
——
Steps 18 through 31 are for the driver’s control box only.
a. If in any position relays do not click and no sidetone is heard, refer to
troubleshooting chart, figure 5-7.
b. If in any position relays do not click but sidetone is heard, refer to
troubleshooting chart, figure 5-12.
c. If in all positions relays click but no sidetone is heard, refer to trouble-
d. If in a particular position relays click but no sidetone is heard, refer to
troubleshooting chart, figure 5-11.
Move handset to J802 or J902.
Set MONITOR switch to INT ONLY.
Key handset and talk into microphone, then unkey handset.
If driver’s control box is a C-2298/VRC, the EPC is completed; if it is a
C-2297/VRC, continue with step 26.
Turn lens cover fully counterclockwise then 1/8 turn clockwise.
Set SIG-EXT-OFF switch to OFF.
Set SIG-EXT-OFF switch to EXT,
AM-1780/VRC relays should click and sidetone should be heard,
If normal indications are not obtained, replace driver’s control box,
Lamp should not light.
Lamp should light, AM-1780/VRC relay should not click.
If lamp lights, refer to troubleshooting
a. If lamp does not light and
AM-1780/VRC circuit breaker does not trip, lamp or lamp circuit is bad.
b. If lamp does not Light and
AM-1780/VRC circuit breaker trips, refer to troubleshooting chart,
c, If lamp Iights but AM-1780/VRC relays click, refer to troubleshooting
If lamp does not light, refer to
troubleshooting chart, figure 5-15.
Set SIG-E XT-OFF switch to SIG.
Return SIG-EXT-OFF switch to EXT.
Set MONITOR switch to ALL.
Turn C-2296/VRC volume control fully clockwise.
C-2296/VRC RAD TRANS-INT switch should be in INT (spring held).
Key handset, H-207, and talk into its microphone,
Lamp should light.
AM-1780/VRC relays should click and sidetone should be heard.
If switch is in RAD TRANS, the switch should be replaced at higher maintenance.
a. If relays do not click, refer to trouble-
b. If relays click but no sidetone is beard, refer to troubleshooting chart,
5-6 Change 3
TM 11-5830-340-12
5-8. Using the Troubleshooting Flow Charts
a. Entry. The troubleshooting flow charts are entered from the equipment performance checklist
(EPC). Based on the abnormal indication observed, use the appropriate chart.
b. Special Symbols. The special symbols listed below are used throughout the troubleshooting flow charts.
(1) W for Ohms (resistance).
(2) > for greater than.
(3) < for less than.
(4)
∞ for infinity (a number too large to write).
(5) control box.
c. Instructions. The instructions listed below apply to the use of the troubleshooting flow charts.
( 1 ) U n l e s s o t h e r w i s e s t a t e d , a l l v o l t a g e measurements, resistance measurements, and circuit disturbance checks are made with respect to chassis ground (bare metal).
(2) To circuit disturb, set the multimeter up as an ohmmeter, RX 10, connect the negative lead to chassis ground (bare metal), and touch the point with the positive lead. A click should be heard.
(3) To measure the ac talk signal, set the multimeter up as an ac multimeter (lowest range), connect the negative lead to chassis ground, connect the positive lead to the test point, key the mike and note the reading. Next, sharply whistle into the mike and look to see if the meter reading changes, An increase in the ac voltage reading indicates the presence of the talk signal.
(4) Observe all WARNINGS and CAUTIONS as they appear throughout the flow charts.
WARNING
To guard against electrical shock, remove or tape all exposed personal objects.
CAUTION
To guard against equipment damage when making measurements or circuit disturbing with power applied, make sure the proper pin is selected and the meter leads do not touch.
d. How to Use a F1
O
w Chart. After selecting a flow chart, as indicated in the equipment performance check, proceed as follows:
(1) Do the actions described in the first rectangle.
(2) Answer the YES or NO question asked in the diamond that follows the first rectangle.
(3) Go to the next step as directed by the answer to the YES/NO question.
(4) Do additional steps as required and directed until the bad item of equipment is found and then follow the repair instructions presented in that box.
(5) Repeat the operational check, or portion of it, after each repair is completed.
NOTE
Troubleshooting flow charts pertain to the
AN/VIC-l only, per the MAC. For application with radios refer to the appropriate TM.
5-7
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts
NOTE:
1. Refer to block diagram ,page 5-9.
2. If system includes radios, refer to the radio
TM for troubleshooting procedures.
5-8
EL2DT031
Figure 5-3. Troubleshooting intercom input power, adverse shor t
5-9. Troubleshooting Flow Charts – continued
TM 11-5830-340-12
Figure 5-4. Troubleshooting intercom block diagram (Sheet 1 of 3).
EL20T032
5-9
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts- Continued
NOTES:
1. Refer to block diagrams
2. If jacks are filled, remove one plug to make test then replace it.
3. Fix or replace and return to operational check at this time.
5-10
Figure 5-4. Troubleshooting intercom input power, adverse open (Sheet 2 of 3)
EL2DT033
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-4. Troubleshoooting intercom input power, adverse open (Sheet 3 of 3).
5-11
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - continued
5-12
Figure 5-5. Troubleshooting intercom power distribution, block diagram (Sheet 1 of 2).
EL2DT035
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-5, Troubleshooting intercom power distribution (Sheet 2 of 2).
E L 2 D T 0 3 6
5-13
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – continued
5-14
Figure 5-6. Troubleshooting intercom keying circuits, block diagram.
EL2DT037
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-7. Troubleshooting intercom keying circuits, adverse open (Sheet 1 of 2)
5-15
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
5-16
Figure 5-7 Troubleshooting intercom keying circuits, adverse open (Sheet 2 of 2).
5-9. Troubleshooting Flow Charts- continued
TM 11-5830-340-12
NOTES :
1. Refer to block diagrams
2. Fix or replace and return to operational check at this time.
3. Turn AM-1780 Main Power Switch to OFF if relay clicks. AM-1780 continuous key if relay does not click AM-1 780 not keyed.
Figure 5-8. Trobleshooting intercom keying circuits, adverse short.
EL2DT040
5-17
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts- Continued
5-18
Figure 5-9. Troubleshooting intercom talk/listen circuits, block diagram.
EL2DT041
5-9. Troubleshooting Flow Charts - Continued
3.
4.
5.
6.
1.
2.
TM 11-5830-340-12
EL2DT042
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 1 of 26).
5-19
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
5-20
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (sheet 2 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 3 of 26).
5-21
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts- continued
5-22
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 4 of 26).
5-9. Troubleshooting Flow Charts – continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercorn talk//isten circuits, adverse for all positions of MONITOR switch (Sheet 5 of 26).
5-23
TM 11-5830-340-12
5-9. Troubleshooting Flow charts – Continued
5-24
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switcvh (Sheet 6 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 7 of 26).
5-25
5 - 2 6
T M 1 1 - 5 8 3 0 - 3 4 0 - 1 2
5-9. Troubleshooting Flow Charts- Continued n
5 SEE NOTE 2
Y t
SET ADVERSE BOX MONTOR
TO ALL. AT AM-1780, J505--
J507 (OPEN JACK), PIN K,
MEASURE AC VOLTAGE.
WHISTLE INTO KEYED MIKE.
I
NO
SEE CAUTION (l).
1. SET AM-1780 POWER CKT
8KR TO ON. AT J505-J507
(OPEN JACK), PIN K, MEA-
SURE RESISTANCE WITH
MIKE KEYED.
1
Y E S
I SET POWER CKT BKR
TO OFF. AT AM-1780.
J50i-J507 (OPEN JACK), 4
PIN L, CIRCUIT DISTURB.
LISTEN TO EARPHONE.
1
I ?)
9
SH 12
FIG. 5-10.
Y E S
(SEE CAUTION, SH 1.) AT
AM-1780, J505-J507 [OPEN
JACK), PIN K, CIRCUIT OIS-
- TURB WITH MIKE KEYED.
LISTEN TO AOVERSE EAR-
7
I
NO b
10
SH 9
FIG. 5-10.
SET AM-1780, POWER CKT
8KR TO OFF. AT J505-J507
(OPEN JACK), PIN L, CIRCUIT
DISTURB. LISTEN TO EAR-
Y E S
EL2DT049
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 9 of 26).
5-27
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – Continued
5-28
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switcfh (Sheet 10 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 11 of 26).
5-29
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
5-30
Figure 5-10 Troubleshooting intercom talk/listen circuits, adverse all positions of MONITOR switch (Sheet 12 of 26).
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-10 Troubleshooting intercom talk/listen circuits, adverse/or all positions of MONITOR switch (Sheet 13 of 26).
5-31
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – Continued
5-32
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MON\ITOR switch (Sheet 14 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-10. Troubleshiooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (sheet 15 of 26).
5-33
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - continued
5-34
Figure 5-10. Troubleshooting intercom talk/listen circuits, adver S e for depositions of MONITOR switch (Sheet 16 of 26).
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 17 of 26)
5-35
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
5-36
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (sheet 18 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 19 of 26).
5-37
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts- Continued
5-38
Figure 5-10. Troubleshooting intercom talk/list circuits, adverse for all positions of MONITOR switch (Sheet 20 of 26).
5-9. Troubleshooting Flow Charts- Continued
TM 11-5830-340-12
Figure 5-10, Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 21 of 26).
5-39
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – continued
NOTES :
1. Refer to figure FO-1 in back of this manual.
2. Use this flow chart if vehicle is equipped with e
C-2297 driver's control box.
3. Set up multimeter as an AC voltmeter (Iowest range) connect motor probes between signal Iine
(test point) and chassis ground; then key mike and note reading. Next sharply whistle into keyed mike and see if motor reading changes. A change in AC voltage reading indicates the presence of the talk signal. (Reading is <1 volt.)
4. Fix or replace and return to operational check at this time.
5. Setup multimeter as an ohmmeter to do circuit disturb, RX1O.
6. Refer to higher maintenance level.
5-40
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 22 of 26).
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 23 of 26).
5-41
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
5-42
Figure 5-20. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switch (Sheet 24 of 26)
5-9. Troubleshooting Flow Charts- Continued
TM 11-5830-340-12
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all position.s of MONITOR switch (Sheet 25 of 26).
5-43
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – Continued
5-44
Figure 5-10. Troubleshooting intercom talk/listen circuits, adverse for all positions of MONITOR switcvh (Sheet 26 of 26).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-11. Troublshooting intercom talk/listen circuits, a particular position of MONITOR switch is adverse (Sheet 1 of 6).
5-45
5-46
T M 1 1 - 5 8 3 0 - 3 4 0 - 1 2
5-9. Troubleshooting Flow Charts– continued
-L
UNPLUG CX-4723 FROM
ADVERSE CONTROL BOX.
AT VACATED JACK PIN
(SEE NOTE 3), CIRCUIT
DISTURB. LISTEN TO
EARPHONE.
~
Y E S
*
I
BAD CX-4723.
NO
BAD CONTROL BOX.
UNPLUG AM-1780’S CX-7060
OR LX-9640 FROM TURRET
BENDIX JACK. AT BENDIX
JACK PIN (SEE NOTE 3),
CIRCUIT DISTURB. LISTEN
TO EARPHONE.
Y E S BAD AM-1780’S
CX-7060 OR CX-9640.
NO t)
3
SH 3
FIG. 5-11.
~’igure 5-1 I, Troubleshooting intercom tdkflisten circuik, czwrtidarposition of~oNIToR Su)itch is adlerse (sheet z of 6)
EL2DT069
5-9. Troubleshooting Flow charts – Continued
TM 11-5830-340-12
E L 2 D T 0 7 0
Figure 5-11. Troubleshooting intercom talk/listen circuits, a particular position of MONITOR switch is adverse (Sheet 3 of 6).
5-47
TM
11−5830−340−12
5-9. Troubleshooting Flow Charts – Continued
EL2DT071
5-48
Figure 5-11. Troubleshooting intercom talk/listen circuits, a particular position of MONITOR switch is adverse (Sheet 4 of 6)
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
EL2DT072
Figure 5-11. Troubleshooting intercom talk/listen circuits, a particular position of MONITOR switch is adverse (Sheet 5 of 6)
5-49
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – Continued
5-50
Figure 5-11. Troubleshooting intercom talk/listen circuits, a particular position of MONITOR switch is adverse (Sheet 6 of 6).
E L 2 D T 0 7 3
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
NOTES:
1. Refer to figure FO-1 in back of this manual.
2. If more cables are plugged to J505--J507, ramove one at a time until fault is isolated
(unkeys).
3. Fix or replace and return to operational chock at this time.
4. Refer to a higher maintenance Ievel.
Figure 5-12. Troubleshooting intercom keying circuits, adverse short (Sheet 1 of 3).
EL2DT074
5-51
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - continued
5-52
Figure 5-12. Troubleshooting intercom keying circuits, adverse short (Sheet 2 of 3).
EL2DT075
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-12. Troubleshooting intercom keying circuits, adverse short (Sheet 3 of 3).
EL2DT076
5-53
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
N O T E S
1. Refer to figure FO-1 in back of this manual.
2. Use this flow chart if the vehicle is equipped with a C-2297/VRC driver’s control box.
3. Fix or replace and return to operational check at this time.
4. Refer to higher level of maintenance.
5-54
Figure 5-13. Troubleshooting C-2296 intercom keying circuits, adverse short (Sheet 1 of 2).
EL2DT077
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
EL2DT078
Figure 5-13. Troubleshooting C-2296 intercom keying circuits, adverse short (Sheet 2 of 2).
5-55
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – Continued
N O T E S :
1. Refer to figure FO-2 in back of this manual.
2. Use this chart if vehicle is equipped with a
C-2297/VRC control box.
3. Fix or replace and return to operational check at this time.
4. Refer to higher level of maintenance.
5-56
Figure 5-14. Troubleshooting intercom power distribution circuits, adverse short (Sheet 1 of 2).
EL2DT079
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
EL2DT080
Figure 5-14. Troubleshooting intercom power distribution circuits, adverse short (Sheet 2 of 2).
5-57
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
NOTES:
1. Refer to figure FO-1 in back of this manual.
for intercom keying and signaling wiring schematic.
2. Us. this flow chart with vehicles equipped with a C-2297/VRC driver's control box.
3. Fix or replace and return to operational check at this time.
4. Refer to a higher level of maintenance.
5-58
Figure 5-15. Troubleshooting intercom keying and signaling circuit, adverse open (Sheet 1 of 2).
EL2DT081
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
EL2DT082
Figure 5-15. Troubleshooting intercom keying and signaling circuit, adverse open (Sheet 2 of 2).
5-59
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts - Continued
NOTES :
1. Refer to figure FO-1 in back of this manual.
2. Use this chart with vehicles equipped with e
C-2297/VRC driver’s control box and
C-2296/VRC outside control box.
3. Fix or replace and return to operational check at this time.
4. Refer to higher maintenance level.
5-60
Figure 5-16. Troubleshooting C-2296 intercom keying and signaling circuit, adverse open (Sheet 1 of 2).
EL2DT083
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
EL2DT084
Figure 5-16. Troubleshooting C-2296 intercom keying and signaling circuit, adverse open (Sheet 2 of 2).
5-61
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – continued
NOTES:
1.
Refer to figure FO-1 in back of this manual for
intercom wiring schematic.
2.
Fix or replace and return to operational check.
3.
Set up multimeter as an ohmmeter to do circuit disturb, RX10.
4.
Set up multimeter as an AC voltmeter (lowest range). Connect meter probes between signal line
(test point) and chassis ground, then key mike and note reading. Next, sharply whistle into mike and look to see if the meter reading changes. A change in AC voltage indicates the presence of the talk signal. (Reading is 1 volt.)
Refer to higher Ievel of maintenance.
5-62
E L 2 D T 0 8 5
Figure 5-17. Troubleshooting intercom talk/listen circuit, adverse for all positions of MONITOR switch (Sheet 1 of 5).
5-9. Troubleshooting Flow Charts - Continued
TM 11-5830-340-12
Figure 5-17. Troubleshooting intercom talk/listen circuit, adverse for all positions of MONITOR switch (Sheet 2 of 5).
EL2DT086
5-63
TM 11-5830-340-12
5-9. Troubleshooting Flow Charts – continued
EL2DT087
5-64
Figure 5-17. Troubleshooting intercom talk/listen circuit, adverse for all positions of MONITOR switch (Sheet 3 Of 5).
5-9. Troubleshooting Flow Charts – Continued
TM 11-5830-340-12
Figure 5-17. Troubleshooting intercom talk/listen circuit, adverse for all positions of MONITOR switch (Sheet 4 of 5).
EL2DT088
5-65
TM 11-5830-340-12
5-66
Figure 5-17. Troubleshooting intercom talk/listen circuit, adverse for all positions of MONITOR switch (Sheet 5 of 5).
EL2DT089
TM 11-5830-340-12
5-10. Troubleshooting C-10456/VRC in Radio-Intercom
System
C-10456/VRC troubleshooting procedures for radiointercom system are the same as those for the
C-2298/VRC. To use the procedures, perform the following operations, in turn, at each C-10456/VRC:
a. Remove the remote keying control cable con-
nected to the remote keying jack J805 (fig. 2-5),
b. Secure the remote keying dummy plug P805 to
J805.
c. Operate the system. If the malfunction still exists, use the procedures outlined in the EPC.
d. If the system now operates normally, connect each remote keying control cable to the associated
C-10456/VRC. Test the system after each cable connection. When malfunction reoccurs, remove the last remote keying cable connected, replace the dummy plug, P805, on J05. If the system operates normally, defect is isolated to the remote keying cable and/or switch associated with the remote keying cable. Refer to maintenance levelfor the vehicle for the repair of the cable and/or switch.
5-11. Maintenance of AN/VIC-1(V) and Radio Intercom
System
a. Repair of the AM-1780/VRC and control boxes includes replacing front panel knobs, indicator lamps, dust covers, and back cover assembly,
b. Parts for components of the radio intercom sys-
tem (fig, 4-4 through 4-10), including the AN/VIC-l(V)
are listed in SB 11-131 under the National stock number of the electronic equipment harness (para
cle in which the equipment is installed. See also TM
11-5820-401-10-2-HR for listing of major components of the vehicle systems associated with the AN/VRC-12
series radios (para 1-6) and to TM 11-5820-498-12-
HR for major components of the vehicle systems associated with AN/VRC-53, -64, AN/GRC-125, and
-160.
5-67/(5-68 blank)
TM 11-5830-340-12
CHAPTER 6
MATERIEL USED IN CONJUNCTION WITH
INTERCOMMUNICATION SET AN/VIC-1(V)
6-1. General
Refer to paragraph 1-10 for information covering
e q u i p m e n t r e q u i r e d t o m a k e t h e A N / V I C - l ( V ) operational.
6-2. Description of Radio System Equipment a. AN/VRC-12 Series Radios. T h e A N / V R C - 1 2 series radios include Radio Sets AN/VRC-12, and
AN/VRC-43 through AN/VRC-49. Figure 4-7 shows
AN/VRC-12 used with the AN/VIC-l(V); figure 4-8
shows AN/VRC-49 used with the AN/VIC-1(V). These radio sets provide short-range, two-way, radiotelephone communication in 30.00 through 75.95 MHz range using frequency-modulated (fm) transmission and reception. The receiver-transmitters of these radio sets can transmit on low (approximately 5 watts) and high (approximately 35 watts) rf power. Description and operation of the radios in conjunction with the
AN/VIC-l(V) in the radio-intercom system are provided in TM 11-5820-401-10-2.
b. Radio Teletypewriter Set AN/VSC-3. When the
AN/VSC-3, which includes Radio Set AN/GRC-106 or
AN/GRC-106A, is used with the AN/VIC-l(V), it is
connected to J503 of the AM-1780/VRC (fig. 4-7)
as “C” radio. Operating procedures are provided in
TM 11-5815-332-15.
c. Radio Sets AN/VRC-53, AN/VRC-64,
AN/GRC-125, and AN/GRC-160. These radio set configurations are similar to AN/VRC-12 series radios
(a above) except they transmit only on low power
(approximately 5 watts maximum). Figure 4-9 shows
AN/VRC-53 or AN/VRC-64 used with the AN/VIC-
1(VI. Description and operation of the radios in conjunction with the AN/VIC-1(V) in the radio-intercom system are provided in TM 11-5820-498-12.
6-3. Description of Audio Accessories
The following or equivalent audio accessories can be used with the radios and radio system equipment.
Information on the use of the audio accessories is dis-
a. Hand Microphone. The microphone used with the
equipment is Microphone, Dynamic (fig. 2-6). It has a
push-to-talk switch, a microphone element behind which is a noise-cancelling element, and a retractile cord terminated in a five-pin connector.
b. Headsets. Typical headsets include Headsets,
Electrical H- 140A/U (TM 11-5965-260-24P) and
H-25l/U (fig. 2-6). The headsets have a pair of
earphones separated by a spring-steel band and each earphone assembly is provided with a rubber cushion to fit over the user’s ears. A retractile cord is terminated in a five-pin connector.
c. Handsets. Typical handsets include Handsets
H-250/U, H-189/GR (TM 11-5965-280-15), and
H-138/GR (TM 11-5965-257-15). A handset includes a dynamic microphone, earphone, and a push-to-talk switch. A retractile cord is terminated in a five-pin connector.
d. Headset-Microphone.
Typical headset-microphone is Headset-Microphone H-161/U (TM 11-5965-
262-13) (fig. 2-6). It has a pair of earphones similar to
those on the headsets (b above), and a dynamic microphone mounted on a boom that can be positioned in front of the user’s lips. Neck and body bands are used to attach the switch assembly to the user’s body, The switch assembly contains a three-position switch and a retractile cord, CX-8650(*)/GR terminated in a pair of five-pin connectors. The retractile cord is connected to the switch assembly section by means of quickdisconnect connectors (bail-out connectors). In some installation kits, CX-8650(*)/GR may be replaced with
longer retractile cord assemblies (para
2-6a).
e. Helmets with Installed Audio Accessories. Some crewmernbers are issued their own size Combat Vehi-
cle Crewmember (CVC) DH-132 Helmet (fig. 2-9) or
Armored Vehicle Crewmember (AVC) DH-132A
Helmet (fig, 2-8). The AVC helmet will be issued as a
direct replacement for the CVC helmet. Each unit includes straps for adjusting the helmet to the user’s head and for holding the earphones of the audio accessory. Maintenance of both helmets is provided in TM 10-8400-201-23. A typical audio accessory used in the CVC helmet is Headset-Microphone Kit
MK-1039/G (TM 11-5965-282-15). A typical audio accessory used in the AVC helmet is Headset-
Microphone Kit MK-1697/G (TM 11-5965-286-14).
Each audio accessory has a switch assembly attached to the side of the helmet, earphones which are attached inside the helmet, a dynamic microphone mounted on a boom that can be positioned in front of the user’s lips, and a retractile cord, CX-8650(*)/GR, with bailout connectors, and terminated in a pair of five-pin connectors. In some installation kits, CX-8650(*)/GR may be replaced with longer retractile cord assemblies
f. Loudspeaker and Extension Cord. T y p i c a l loudspeaker available is Loudspeaker LS-454/U (fig.
2-7) (TM 11-5965-255-15P). It is provided with a cord
terminated in a five-pin connector. The loudspeaker
6-1
TM 11-5830-340-12 case has a clamp to enable the unit to be mounted in a convenient place near the equipment. Cable Assembly,
Special Purpose, Electrical CX-7867/VRC (of various lengths) can be used between the equipment and the loudspeaker to enable the loudspeaker to be located at a distance from the equipment.
6-4. Cable Assemblies Used With Radio Sets and Radio-
Intercom Systems
Following are typical cable assemblies that may be used with the radios and radio-intercom system. Each cable assembly is available in various lengths suitable to the vehicle in which it is used (SB 11-131). Most of
the cable assemblies are shown installed in figures 4-4
through 4-10.
a. Cable Assembly, Special Purpose, Electrical
CX-4722/VRC. This cable assembly is the control cable between the receiver-transmitters and the antenna matching unit. It has two 12-terminal connectors; a male on one end and female on the other.
b. Cable Assembly, Radio Frequency CG-1773/U.
This rf antenna cable assembly is used to connect the radio to the antenna. It is type RG-58/U cable terminated on one end with a right-angle BNC connector and on the other end with a straight BNC connector.
An adapter UG-306/U is provided in some installations to provide less strain on the CG-1773/U in its position in the equipment.
c. Cable Assembly, Radio Frequency CG-1127/U.
This is a short rf cable assembly used between two
R-442(*)/VRCs. It is type RG-58/U terminated on both ends with a right-angle BNC connector.
d. Cable Assembly, Special Purpose, Electrical
CX-4723/VRC. This cable is the type most commonly used throughout the radio-intercom system. It is terminated in 18-terminal male connectors at both ends.
e. Cable Assemby, Special Purpose, Electrical
CX-7056/VRC. This cable has a nine-terminal male connector on one end and a 14-terminal male connector on the other.
f. Cable Assembly, Special Purpose, Electrical
CX-7057/VRC. This cable has a l4-terminal female connector on one end and a nine-terminal male connector on the other.
g. Cable Assembly, Special Purpose, Electrical
CX-7058/VRC. This cable has a nine-terminal male connector on each end.
h. Cable Assembly, Special Purpose, Electrical
CX-7059\VRC. This cable has a 19-terminal male connector on one end and an 18-terminal male connector on the other.
i. Cable Assembly, Special Purpose, Electrical
CX-7060/VRC. This cable has an 18-terminal male connector on one end and a 14-terminal male connector on the other.
j. Cable Assembly Special Purpose, Electrical
CX-7621/VRC. This is a short two-wire cable terminated on one end with a four-terminal male connector attached to the C-2296/VRC and a pair of tinned wires on the other end to be attached to the external call lamp on the box containing the C-2296/VRC on the outside of some vehicles.
k. Cable Assembly,, Special Purpose, Electrical
CX-9640/VRC. This is a five-wire cable terminated on both ends with an 18-terminal male connector.
1. Cable Assembly, Power, Electrical CX-4720/VRC
(fig. 4-11). This power cable is terminated on one end
with a four-terminal female connector and on the other end the four wires are paired and tinned. The tinned pairs are connected to terminal lugs or a Bendix connector, as required for the installation of each particular vehicle.
m. Cable Assembly, Power, Electrical CX-4721/
VRC. This power cable is terminated on one end with a four-terminal female connector and a four-terminal male connector on the other.
6-5. Power Supply PP-2953(*)/U
The PP-2953(*)/U (TM 11-6130-233-12) is used to provide regulated and filtered 27.2 volts dc from an ac power source. It may be used in fixed installations to provide power for radios or the AM-1780/VRC.
a. Ac power sources may be 115 volts, 50-60 Hz,
4 amperes maximum; 230 volts, 50-60 Hz, 2 amperes, maximum; a n d 1 1 5 v o l t s , 4 0 0 H z , 4 a m p e r e s , maximum.
b. The regulated 27.2 volts output (fixed; but variable to 22 volts dc output by internal control) is applied through CX-472l/VRC to the radio or J508 of
AM-1780/VRC.
c. Transformer, Variable TF-523/U (TM 11-5950-
212-15) can be used with the PP-2953(*)/U to provide controlled ac input when the ac power source voltage is beyond the ac input limits of the PP-2953(*)/U.
6-6. Electrical Transient Suppressor MX-7778(*)/GRC
T h e M X - 7 7 7 8 ( * ) / G R C c o n s i s t s o f s u p p r e s s o r
MX-7777(*), Cable CX-10613, and all other items needed to complete the installation.
6-2
AR 55-38
AR 735-11-2
DA Pam 25-35
DA Pam 738-750
DA Pam 750-10
SB 11-131
SB 11-573
SB 11-624
TB 385-4
TB 43-0118
TM 10-8400-201-23
TM 11-2300-372-14-2
TM 11-5815-332-15
TM 11-5820-401-10-2
TM 11-5820-401-10-2-HR
TM 11-5820-401-20-2
TM 11-5820-498-12
TM 11-5820-498-12-HR
TM 11-5830-340-12
APPENDIX A
REFERENCES
Reporting of Transportation Discrepancies in Shipments (NAVSUPINST 4610.33C; AFR 75-18;
MCO P4610.19D; DLAR 4500.15)
Reporting of Item and Packaging Discrepancies (DLAR 4140.55; AFR 4355,73A; AFR 400-54; MCO
4430.3F)
Consolidated Index of Army Publications and Blank Forms.
The Army Maintenance Mangement System (TAMMS).
US Army Equipment Index of Modification Work Orders.
Vehicular Radio Sets and Authorized Installations.
Painting and Preservation Supplies Available for Field Use for Electronics Command Equipment.
Warning Notice for Vehicles in Which Radios are Mounted.
Safety Precautions for Maintenance of Electrical/Electronic Equipment.
Field Instructions for Painting and Preserving Electronic Command Equipment Including
Camouflage Pattern Painting of Electrical Equipment Shelters.
Organizational and Direct Support Maintenance Manual: General Repair Procedures for Clothing and Individual Equipment
I n s t r u c t i o n s f o r I n s t a l l i n g I n s t a l l a t i o n K i t s , E l e c t r o n i c E q u i p m e n t M K - 1 2 5 5 / V I C - l ( V ) ,
MK-1256/VIC-l(V), and MK-1257/VIC-l(V) in Truck, Cargo, l¼ Ton, 6 X 6, M561 for Intercommunication Set AN/VIC-l(V).
Operator’s, Organizational, Direct Support General Support and Depot Maintenance Manual:
Radio Teletypewriter Set, AN/VSC-3 (NSN 5815-00-224-8130) and AN/VSC-3A (5815-01-102-
5 9 1 6 ) ( R e p r i n t e d W / B a s i c I n c l C l - 1 0 )
Operator’s Manual, Radio Sets, AN/VRC-12 (NSN 5820-00-223-7412), AN/VRC-43 (5820-00-
223-7415), AN/VRC-44 (5820-00-223-7417), AN/VRC-45 (5820-00-223-7418), AN/VRC-46
(5820-00-223-7433), AN/VRC-47 (5820-00-223-7434), AN/VRC-48 (5820-00-223-7435) and
AN/VRC-49 (5820-00-223-7437) (Used with an Intercom System)
Hand Receipt Manual Covering the End Item/Components of End Items (COEI), Basic Issue
Items (BII) and Additional Authorization List (AAL) for Radio Sets, AN/VRC-12 (NSN 5820-00-
223-7412), AN/VRC-43 (5820-00-223-7415), AN/VRC-44 (5820-00-223-7417), AN/VRC-45
(5820-00-223-7418), AN/VRC-46 (5820-00-223-7433), AN/VRC-47 (5820-00-223-7434),
AN/VRC-48 (5820-00-223-7435), and AN/VRC-49 (5820-00-223-7437) (Used With Intercom
System).
organizational Maintenance Manual for Radio Sets, AN/VRC-12 (NSN 5820-00-223-7412),
AN/VRC-43 (5820-00-7415), AN/VRC-44 (5820-00-223-7417), AN/VRC-45 (5820-00-223-7418),
AN/VRC-46 (5820-00-223-7433), AN/VRC-47 (5820-00-223-7434), AN/VRC-48 (5820-00-223-
7435) and AN/VRC-49 (5820-00-223-7437) (Used W/Intercom System, AN/VIC-l(V) (EE 150-
JA-MMO-020/E 154-VRC-12, 43)
Operator’s and Organizational Maintenance Manual: Radio Sets, AN/VRC-53 (NSN 5820-00-223-
7467), AN/VRC-64 (5820-00-223-7475), AN/GRC-125 (5820-00-223-7411) and AN/GRC-160
(5820-00-223-7473) and Amplifier Power Supply Groups OA-3633/GRC and OA-3633A/GRC
(5820-00-973-3383) (Reprinted W/Basic Incl C1-9)
Hand Receipt Manual Covering End Item/Components of End Item (COEI), Basic Issue Items
(BH), and Additional Authorization List (AAL) for Radio Sets, AN/VRC-53 (NSN 5820-00-
223-7467), AN/VRC-63 (5820-00-223-7475), AN/GRC-125 (5820-00-223-7411) and AN/GRC-160
(5820-00-223-7473)
Change 3
A-1
TM 11-5965-257-15
TM 11-5965-260-24P
TM 11-5965-262-13
TM 1-5965-280-15
TM 1-5965-282-l5
TM 1-5965-286-14
TM 11-5965-286-23P
TM 11-6130-233-12
TM 11-6625-3199-14
TM 740-90-1
TM 750-244-2
TM 11-5830-340-12
TM 11-5820-667-12
TM 1l-5820-898-20P
TM 11-5830-340-23P
TM 11-5895-1548-24P
TM 11-5895-1548-34
TM 11-5915-223-12
TM 11-5915-224-14
TM 11-5950-212-15
TM 11-5965-255-14P
A-2 Change 4
TM 11-5830–340-12
APPENDIX B
MAINTENANCE ALLOCATION CHART (MAC)
Section I. INTRODUCTION
B.1 THE ARMY MAINTE NANCE SYSTEM MAC.
a. This introduction (section 1) provides a general explanation of all maintenance and repair functions authorized at various maintenance levels under the standard Army Maintenance System concept.
b. The Maintenance Allocation Chart (MAC) in section II designates overall authority and responsibility for the performance of maintenance functions on the identified end item or component. The application of the maintenance functions to the end item or component will be consistent with the capacities and capabilities of the designated maintenance Ievels, which are shown on the MAC in column (4) as:
Unit – includes two subcolumns, C (operator/crew) and O (unit) maintenance.
Direct Support – includes an F subcolumn.
General Support – includes an H subcolumn.
Depot - includes a D subcolumn.
c. Section III lists the tools and test equipment (both special tools and common tool sets) required for each maintenance function as referenced from section ii.
d. Section IV contains supplemental instructions and
maintenance function.
explanatoty notes for a particular
B . 2
Maintenance functions are limited to and defined as follows:
a. Inspect
To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical characteristics with established standards through examination
(e.g., by sight, sound, or feel).
b. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or
electrical characteristics of an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating condition;
e.g., to clean (includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases.
d. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position,
or by setting the operating characteristics to specified parameters.
Change 4 B-1
TM 11–5830–340–12
e. Align. To adjust specified variable elements of an item to bring about optimum or desired
performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted on
instruments or test, measuring, and diagnostic equipment used in precision measurement.
Consists of comparisons of two instruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared.
g. Remove/Install. To remove and install the same item when required to perform service or other maintenance functions. Install maybe the act of emplacing, seating, or fixing into position a spare, repair part, or module (component or assembly) in a manner to allow the proper functioning of an equipment or system.
h. Replace. To remove an unserviceable item and install a serviceable counterpart in its
place. “Replace” is authorized by the MAC and assigned maintenance level is shown as the third position code of the SMR code.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a
completely serviceable/operational condition as required by maintenance standards in appropriate technical publications (i.e., DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally return an item to like new condition.
k. Rebuild.
Consists of those services/actions necessary for the restoration of unserviceable equipment to a like new condition in accordance with original manufacturing standards, Rebuild is the highest degree of materiel maintenance applied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements (e.g., hours/miles) considered in classifying Army equipment/components.
B - 2 Change 4
TM 11–5830–340–12
B.3 EXPLANATION OF COLUMNS IN MAC, SECTION Il.
a.
Column 1, Group Number. Column 1 lists functional group code numbers, the purpose
of which is to identify maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.
b. Column 2, Component/Assembly. Column 2 contains the item names of components,
assemblies, subassemblies, and modules for which maintenance is authorized.
c. Column 3, Maintenance Function. Column 3 lists the functions to be performed on the
item listed in column 2. (For detailed explanation of these functions, see para B-2.)
d. Column 4, Maintenance Level. Column 4 specifies each level of maintenance
authorized to perform each function listed in column 3, by indicating work time required
(expressed as man–hours in whole hours or decimals) in the appropriate subcolumn. This work–time figure represents the active time required to perform that maintenance function at the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance function vary at different maintenance levels, appropriate work–time figures are to be shown for each level. The work-time figure represents the average time required to restore an item (assembly, subassembly, component, module, end item or system) to a serviceable condition under typical field operating conditions. This time includes preparation time (including any necessary disassembly/assembly time), troubleshooting/ fault location time, and quality assurance time in addition to the time required to perform the specific tasks identified for the maintenance functions authorized in the maintenance allocation chart. The symbol designations for the various maintenance levels are as follows: c . . . . . . . . . . . . . .
Operator or crew maintenance
o . . . . . . . . . . . . . .
Unit maintenance
F . . . . . . . . . . . . . .
L . . . . . . . . . . . . . .
Direct support maintenance
Specialized Repair Activity (SRA) 5
H . . . . . . . . . . . . . .
D . . . . . . . . . . . . . .
General support maintenance
Depot maintenance
C h a n g e 4 B - 3
TM 11-5830-340-12 e.
Column 5, Tools and Test Equipment Reference Code.
Column 5 specifies, by code, those common tool sets (not individual tools), common TMDE, and special tools, special TMDE, and special support equipment required to perform the designated function. Codes are keyed to tools and test equipment in section Ill.
f. Column 6, Remarks.
When applicable, this column contains a letter code, in alphabetical order, which is keyed to the remarks contained in Section IV.
B.4 EXPLANATION OF COLUMNS
IN
TOOLS AND TEST EQ UIPMENT SECTION Ill.
a. Column 1, Reference Code.
The tool and test equipment reference code correlates with a code used in the MAC, section II, column 5.
b. Column 2, Maintenance Level.
The lowest level of maintenance authorized to use the tool or test equipment.
B.5.
a. Column 1, Remarks Code.
The code recorded in column 6, Section II.
b. Column 2, Remarks.
This column lists information pertinent to the maintenance function being performed as indicated in the MAC, section Il.
B-4 Change 4
TM 11–5830–340–12
Section Il. MAINTENANCE ALLOCATION CHART
FOR
INTERCOMMUNICATION SET AN/VIC- 1(V)
Change 4 B - 5
TM 11-5830-340-12
B-6 Change 4
TM 11–5830–340–12
Change 4 B - 7
TM 11-5830-340-12
Section Ill. TOOLS AND TEST EQUIPMENT
FOR
INTERCOMMUNICATION SET AN/VIC-1(V)
6 6 2 5 - 0 1 - 2 6 5 - 6 0 0 0
5 1 8 0 - 0 0 - 0 6 4 - 5 1 7 8
5180-000-605-0079
6130-000-985-7899
6625-00-783-5965
6625-01-144-4481
6625-00-668-9418
6625-01-144-4481
6625-01-643-1670
6625-01-144-4481
6625-00-228-2201
6625-01-187-7848
6625-00-880-6081
6695-01-073-9492 or equal
6625-01-217-0054
6625-01-145-2430
B - 8 Change 4
TM 11-5830-340-12
Section Ill. TOOLS AND TEST EQUIPMENT
FOR
INTERCOMMUNICATION SET AN/VIC-1(V)
5905-00-141-1183
5905-00-119-8811
5905-00-407-6167
5905-00-111-1679
5905-00-119-3505
5820-00-892-0622
5820-00-892-0623
5820-00-893-1323
6625-00-790-2746
5820-00-892-3337
5820-00-892-3338
5305-00-173-1119
5995-00-823-2726
5995-00-823-2833
5995-00-823-3073
5985-00-177-1639
5820-00-892-3339
5995-00-823-2818
5995-00-261-9880
Change 4 B-9
TM 11-5830-340-12
Section Ill. TOOLS AND TEST EQUIPMENT
FOR
INTERCOMMUNICATION SET AN/VIC-1(V)
5965-00-043-3463
5965-00-876-2375
B-10 Change 4
SECTION IV. REMARKS FOR INTERCOMMUNICATION SET AN/VIC - 1(V)
TM 11-5830-340-12
Refer to TM 11-5895-154&34 for repair.
Change 4 B-11/(B-12 blank)
TM 11-5830-340-12
Figure FO-1. AN/VIC-1(V), audio signals and keying
control circuits (without radios).
FP-1/(FP-2 blank)
TM 11-5830-340-12
Figure FO-2. AN/VIC-1(V), dc power distribution circuits
(without radios).
FP-3/(FP-4 blank)
TM 11-5830-340-12
Figure FO-3. AN/VRC-1(V) using C-10456/VRC, audio signals and keying control circuits (without radios).
FP-5/(FP-6 blank)
TM 11-5830-340-12
Figure FO-4. AN/VIC-1(V) using C-10456/VRC, dc power distribution circuits (without radios).
FP-7/(FP-8 blank)
By Order of the Secretary of the Army:
JOHN A. WICKHAM JR.
General, United States Army
Chief of Staff
Official:
MILDRED E. HEDBERG
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION :
T o b e d i s t r i b u t e d i n a c c o r d a n c e w i t h D A F o r m 1 2 - 5 1 l i t e r a t u r e r e q u i r e m e n t s f o r A N / V I C - 1 ( V ) .
✰ U.S. GOVERNMENT PRINTING OFFICE : 1987 - 201-421 (71150)
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ATTN: AMSEL-ME-MP
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THE METRIC SYSTEM AND EQUIVALENTS
PIN: 018990-004
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