TM-11-5805-246-10

TM-11-5805-246-10
TM 11-5805-246-10
OPERATOR’S MANUAL
TELEGRAPH TERMINAL
TH-5/TG AND TH-5A/TG
(NSN 5805-00-315-2858)
(NSN 5805-00-246-8734)
HEADQUARTERS, DEPARTMENT OF THE ARMY
24 MARCH 1983
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
HIGH VOLTAGE IS USED IN THE OPERATION OF THIS EQUIPMENT.
DEATH ON CONTACT
MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS.
DANGEROUS VOLTAGES EXIST IN THE FOLLOWING COMPONENTS OF TELEGRAPH
TERMINAL TH-5/TG AND TH-5A/TG:
INPUT CIRCUIT:
TH-5/TG 115 VOLTS
TH-5A/TG 115 VOLTS
POWER TRANSFORMER T6:
TH-5/TG 560 VOLTS
TH-5A/TG 560 VOLTS
OUTPUT VOLTAGE:
285 VOLTS DC
DO NOT TAKE CHANCES!
REMOVE POWER CORD FROM POWER SOURCE OR REMOVE FUSE BEFORE MAKING ANY
CONNECTIONS OR REPLACING ANY PARTS INSIDE THE EQUIPMENT.
TO PREVENT DAMAGE TO TELEGRAPH TERMINAL BE SURE TELEGRAPH TERMINAL IS
CORRECTLY SECURED TO EQUIPMENT RACK MT-1278/U OR MOUNTING MT-791 NJ.
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.
A/ (B blank)
TM 11-5805-246-10
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHINGTON, DC 24 March 1983
TECHNICAL MANUAL
No. 11-5805-246-10
OPERATOR'S MANUAL
TELEGRAPH TERMINAL
TH-5/TG (NSN 5805-00-315-2858)
TH-5A/TG (NSN 5805-00-246-8734)
REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any mistakes or if you know of a way to improve the
procedures please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form 2028-2 located in back of this manual direct to: Commander, US
Army Communications-Electronics Command and Fort Monmouth, ATTN: DRSEL-ME-MP, Fort Monmouth, New Jersey 07703. A reply will be furnished to you.
Page
HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
I
II
Ill
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Technical Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
I
II
Ill
IV
Description and Use of Operator's Controls and lndicators . . . . . . . . . . . . . . . . . . . . . 2-2
Operator Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . . . 2-4
Operation Under Usual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Operation Under Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
3
MAINTENANCE INSTRUCTIONS., . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Section
I
II
Ill
Lubrication Instructions, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Troubleshooting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
APPENDIX
A
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
B
COMPONENTS OF END ITEM AND BASIC ISSUE ITEM LISTS . . . . . . . . . . . . . . . . . . . . . B-1
CHAPTER
Section
CHAPTER
Section
CHAPTER
GLOSSARY
........................................................................
Glossary 1
INDEX
........................................................................
Index 1
*This manual supersedes TM 11-5805-246-10, 20 June 1960, including all changes.
i
TM 11-5805-246-10
HOW TO USE THIS MANUAL
In this manual paragraphs are numbered by chapter and the order in which they appear in
each chapter. To find the paragraph you need, first locate your subject in the table of
contents. Turn to the page shown and read the paragraph headings until you see what
you’re looking for. Special tools and parts are shown in the rear of this manual as
appendixes. If you find a word or term you don’t understand, refer to the glossary.
ii
TM 11-5805-246-10
TELEGRAPH TERMINAL TH-5/TG and TH-5A/TG
1-0
TM 11-5805-246-10
CHAPTER 1
INTRODUCTION
Section
Subject
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
Equipment Description, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
Technical Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
Page
1-1
1-3
1-6
OVERVIEW
This chapter contains general information, equipment description and principles of operation for
Telegraph Terminal TH-5/TG and TH-5A/TG.
Section I GENERAL INFORMATION
Subject
Para
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Maintenance Forms, Records and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Destruction of Army Electronics Materiel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Reporting Equipment Irnprovernent Recommendations . . . . . . . . . . . . . . . . . . . . . . . 1-5
Nomenclature Cross-Reference List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Page
1-1
1-1
1-2
1-2
1-2
1-2
1-3
1-1. SCOPE.
This manual describes Telegraph Terminals TH-5/TG and TH-5A/TG and is a guide for operation,
troubleshooting and maintenance of each unit. The telegraph terminals are used to provide
teletypewriter transmission between distant stations.
1-2. MAINTENANCE FORMS, RECORDS AND REPORTS.
REPORTS OF Maintenance AND UNSATISFACTORY EQUIPMENT
Department of the Army forms and procedures used for equipment maintenance will be those
prescribed by TM 38-750, The Army Maintenance Management System (TAMMS).
REPORT OF PACKAGING AND HANDLING Deficiencies
Fill out and forward SF 364 (Report of Discrepancy (ROD)) as prescribed in AR 735-11-2/DLAR
4140.55/NAVMATlNST 4355.73/AFR 400-54/MC0 4430.3E.
1-1
TM 11-5805-246-10
1-2. MAINTENANCE FORMS, RECORDS AND REPORTS. (CONT)
DISCREPANCY IN SHIPMENT REPORT (DISREP) (SF 361).
Fill out and forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR 55-38/
NAVSUPINST 4610.33B/AFR 75-18/MCO P4610.19C/DLAR 4500.15.
1-3. DESTRUCTION OF ARMY ELECTRONICS MATERIEL.
Destruction of Army electronics materiel to prevent enemy use shall be in accordance with
TM 750-244-2.
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
paragraph 2-23.
1-5. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR).
If your telegraph terminal 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 your equipment. Let us know why you don’t
like the design or performance. Put it on an SF 368 (Quality Deficiency Report). Mail it to:
commander, US Army Communications-Electronics Command and Fort Monmouth. ATTN: DRSEL-MEMP, Fort Monmouth, New Jersey 07703. A reply will be sent to you.
1-6. NOMENCLATURE CROSS-REFERENCE LIST.
This list contains the common names used throughout this manual in place of official
nomenclature.
Common Name
1-2
Official Nomenclature
Telegraph terminal
Telegraph Terminal TH-5/TG or TH-5A\TG
Telegraph terminal rack
Electrical Equipment Rack MT-1278/U
Telegraph terminal mount
Mounting MT-791/U
Remote control unit
Control Unit RM-39
Line control unit
Telegraph Line Control Unit C-2894/FG
Telephone
Telephone Set TA-312/PT
Vf ringer
Telegraph-Telephone Signal Coverter TA-182/U
TM 11-5805-246-10
1-7. LIST OF ABBREVIATIONS.
This list contains all abbreviations used in this manual.
Abbreviation
Name
ac
am
bfo
cw
dbm
dc
dx
freq
fsk
Hz
kHz
km
ma
mHz
nsk
ow
owr
pwr
rf
rtty
rt
ssb
swr
tty
vac
vf
vswr
wpm
alternating current
amplitude modulation
beat frequency oscillator
continuous wave
decibels referenced to one milliwatt
direct current
duplex
frequency
frequency shift keying
Hertz
kilohertz
kilometer
milliampere
megahertz
narrow frequency shift keying
orderwire
one way reverisble
power
radio frequency
radio-teletypewriter
receiver-transmitter
single side band
standing wave radio
teletypewriter
volts alternating current
voice frequency
voltage, standing wave ratio
words per minute
Section II EQUIPMENT DESCRIPTION
Subject
Para
Equipment Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Capabilities and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Differences Between Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Equipment Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Page
1-3
1-4
1-4
1-5
1-8. EQUIPMENT CHARACTERISTICS.
The telegraph terminal isused between teletypewriter stations to change dc telegraph pulses
generated from a teletypewriter into voice frequency signals for transmission over voice channels
and changes received voice frequency signals back into telegraph pulses.
1-3
TM 11-5805-246-10
1-9. CAPABILITIES AND FEATURES.
MAJOR SYSTEM COMPONENTS
Converter case
Cover assembly
Spare fuse holder
Running spares
Mounting tracks
FEATURES
All weather operational
Portable
Can be used with or without mounting MT-791/U
1-10. DIFFERENCES BETWEEN MODELS.
Telegraph Terminal TH-5/TG can be used with Telephone Terminal TH-5A/TG. The TH-5A/TG model is a
modified TH-5/TG unit for use in the AN/TRC-80.
DIFFERENCE IN
CHARACTERISTICS
TH-5/TG
TH-5A/TG
Line voltage
115 volts, single phase,
50 to 60 Hz
115 volts, single phase
47 to 420 Hz
Power transformer T6
50 to 60 Hz
CPN 672-0124-00
47 to 420 Hz
Rectifier shield
7-pin miniature, long
7-pin miniature, short
Receiving sensitivity
-50, -35, or -25 dbm
-50 or -25 dbm
NOTE
Vacuum tubes V3, V4, V6, V13, V14 and V15 may be replaced with semiconductors
5961-00-076-3545 and 5961-00-076-3546. Vacuum tube V13 may be replaced with
semiconductor 5961-00-645-2331. Locator diagrams will reference semiconductors which
may or may not be present. If a semiconductor is present, use a multimeter for tests.
1-4
TM 11-5805-246-10
1-11. EQUIPMENT DATA.
WEIGHTS AND DIMENSIONS
Weight
Length
Width
Height
18-1/2 pounds
11 inches
10-1/2 inches
7-1/2 inches
PERFORMANCE
Transmission speed
60, 75, 100 words
per minute
Voltage requirement
115 vac
Power consumption
65 watts (approx.)
Circuit application
Used with two or
four wire systems
Type of modulation
Frequency shift keying
Bandwidth
200 Hz
Transmission frequency
Mark 1325 Hz ±2 Hz
Space 1225 Hz ±2 Hz
Ringbreak 20 Hz
Minimum input level
vf signal 50 dbm
Ringing signal 90 vac
20 Hz
Jack current
Send
Receive
14.85 to 18.15 ma
19 to 32 ma
Signal time delay
5 to 8 milliseconds
Distortion
Receiving
Transmitting
5 percent maximum
5 percent maximum
Impedance (at 1,000 Hz)
Input
Output
600 ohms
600 ohms
1-5
TM 11-5805-246-10
Section Ill TECHNICAL PRINCIPLES OF OPERATION
Subject
Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Para
Page
1-12
1-13
1-6
1-6
1-12. OPERATING CHARACTERISTICS.
Telegraph Terminals TH-5/TG and TH-5A/TG are used between teletypewriter stations to provide
teletypewriter transmission over lines which will not pass direct current (de). For transmitting, the
neutral mark and space signals from the teletypewriter are 1,325 and 1,225 Hz respectively. The
received voice frequency (vf) signals are changed back to the corresponding neutral dc signals. The
telegraph terminal provides a means of 20 Hz signaling. If vf signaling is needed a vf ringer such as
Telegraph-Telephone Signal Converter TA-182/U must be used. The telegraph terminal also provides for
connection of a local-battery field telephone. Teletypewriter transmissions cannot be made when the
telephone is in use.
1-13. COMPONENT FUNCTIONS.
Component functions are divided into the following groups:
Sending circuit: Changes neutral dc teletypewriter signals to vf frequency shift teletypewriter
signals.
Carrier removal circuit: Prevents the output of the sending circuit from being applied to the
line when the teletypewriter sends a consent mark (idle) signal.
Receiving circuit: Changes vf frequency shift teletypewriter signals to neutral dc teletypewriter signals.
Threshold circuit (level control): Disables the receiving circuit when vf frequency shift
teletypewriter signals below approximately 50 dbm are received from the line.
Signaling and ringing circuits: Transmit and receive 20 Hz signals.
Power supply: Provides operating power for the circuits of the telegraph terminal.
1-6
TM 11-5805-246-10
CHAPTER 2
OPERATING INSTRUCTIONS
Subject
Sect ion
Description and Use of Operator’s Controls and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
Operator Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . II
Operation Under Usual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
Operation Under Unusual Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
Page
2-2
2-4
2-15
2-66
OVERVIEW
This chapter contains a description of controls and indicators, operating instructions, and
operator preventive maintenance checks and services for the telegraph terminal.
2-1
TM 11-5805-246-10
Section I DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS
DESCRIPTION OF CONTROLS
(1) NORM-REC-SEND Switch
FUNCTION
Arranges telegraph terminal for operation on
either wire or radio circuits.
Switch position
NORM
For transmitting or receiving over 2 or 4
wire circuit.
REC
For receiving over radio link.
SEND
For transmitting over radio link.
(2) 4W-2W-TEL Switch
Arranges for type of line circuit in
teletypewriter or telephone operation.
Switch position
2-2
4W
For operation on 4 wire circuit.
2W
For operation on 2 wire circuit.
TEL
For talking and signaling over telephone
circuits.
TM 11-5802-246-10
2-1. DESCRIPTION AND USE OF OPERATOR’S CONTROLS AND INDICATORS. (CONT)
DESCRIPTION OF CONTROLS
(3) RING Switch
FUNCTION
Controls signaling and buzzer unit.
Switch position
Down
Connects power to ringing generator and applies
20 Hz signal to 2W or 4W-S binding posts.
up
Connects buzzer circuit and receiver disabling
circuit (REC jack) across either 2W or 4W-R
binding posts.
(4) Glowlamp
Provides visual indication (2W operation only)
that the equipment is ready to transmit
teletypewriter impulses.
(5) Fuse 1.5 amp
Contains a 1.5 amp fuse which protects the
equipment from excessive voltages.
(6) Power cord strain
relief
Power cord strain relief prevents damage and
separation of power cord connection.
(7) REC jack
The REC jack receives red plug from
receiver section of the teletypewriter.
(8) SEND jack
The SEND jack receives black plug from
transmitter section of the teletypewriter.
(9) SEND jack
The SEND jack receives gray plug from
transmitter distributor section of the
teletypewriter.
(10) Binding posts 1 through 6
Binding posts 1 thru 6 provide for wire
connections. The posts have a spring action
and wires can be connected by pushing forward
on the post. When the post is released the
spring action will hold the wire securely.
The number of wires and posts used determine
the type of circuit and mode of communication.
2-3
TM 11-5805-246-10
Section II PREVENTIVE MAINTENANCE CHECKS AND SERVICES
Subject
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operator PreventiveMaintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . .
Para
Page
2-2
2-4
2-5
2-2. OVERVIEW.
Operator’s Preventive Maintenance Checks and Semites (PMCS) are required before operation of
your equipment to keep it in good operating condition.
Before operation, do the before (B) PMCS listed in the PMCS table to be sure that your equipment
is ready for operation.
If the equipment fails to operate, refer to. operator’s troubleshooting (para 3-2) in this manual.
Use TM 38-750 as a guide for reporting problems and using forms.
If the equipment must be kept in service continuously, check and service only the things that can
be checked and serviced without disturbing operation. Make complete checks and services when
equipment can be shut down.
The column titled Equipment is not Ready/Available If tells you why your equipment cannot be used
if the item to be inspected does not meet procedure needs.
Routine checks like equipment inventory, cleaning, and checking for loose hardware, nuts, bolts,
and screws are not listed in the PMCS table. You should do these things any time that you see
that they need to be done. If you find a routine check listed in the PMCS table, it is because
other operators reported problems with this item.
The Item Number column in the PMCS table is to be used as a source of item numbers for the TM
Number column on DA Form 2404, Equipment Inspection and Maintenance Worksheet, for recording
PMCS results.
NOTE
Always keep in mind the CAUTIONS and WARNINGS.
2-4
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES
B - BEFORE OPERATION
ITEM
NO.
1
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
EQUIPMENT IS NOT
READY/AVAIIABLE IF:
TELEGRAPH TERMINAL
Check that equipment is complete.
Any parts are missing.
2-5
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B- BEFORE OPERATION
ITEM
NO.
2
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
POWER CORD
Check that power cord is not frayed or cut
and that the power plug is not cracked.
Check that power plug prongs are not badly
bent or broken.
2-8
EQUIPMENT IS NOT
READY/AVAIIABLE IF:
Power cord is cut or frayed.
Power plug is cracked or
prongs are broken.
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
3
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
EQUIPMENT IS NOT
READY/AVAILABLE IF:
TELEGRAPH TERMINAL
Check that equipment is operational by
inserting power plug into proper receptacle.
Amber light will light if unit is working.
Amber light does not light.
2-7
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B- BEFORE OPERATION
ITEM
NO.
4
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
TELEGRAPH TERMINAL
Check that 1.5 amp fuse is not blown.
2-8
EQUIPMENT IS NOT
READY/AVAlLABLE IF:
Fuse is blown.
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
5
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
EQUIPMENT IS NOT
READY/AVAlLABLE IF:
TELEGRAPH TERMINAL
Check RING switch with equipment power
cord plugged into power receptacle. Push
switch down, ring tone should be heard.
Light should be visible behind front panel.
RING switch does not work.
2-9
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
6
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
TELEGRAPH TERMINAL
Check front panel controls and binding posts
for trouble free operation.
2-10
EQUIPMENT IS NOT
READY/AVAlLABLE IF:
Controls bind or binding
posts do not work.
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
7
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
EQUIPMENT IS NOT
READY/AVAILABLE IF:
TELEGRAPH TERMINAL
Check that front panel quick-release screws
are tight.
Screws cannot be tightened.
2-11
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
8
INTERVAL
B
ITEM TO BE INSPECTED
PROCEDURE
COVER ASSEMBLY
Check that the cover assembly’s waterproof
gasket is not cracked or torn. Cover should
fit tight over unit.
2-12
EQUIPMENT IS NOT
READY/AVAILABLE IF:
Waterproof gasket is
cracked, or worn.
TM 11-5805-246-10
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)
B - BEFORE OPERATION
ITEM
NO.
9
INTERVAL
ITEM TO BE INSPECTED
PROCEDURE
EQUIPMENT IS NOT
READY/AVAILABLE IF:
TELEGRAPH TERMINAL
Check outside of transit case and front
panel for rust. See paragraph 3-7 for
cleaning instructions.
Outside of transit case or
front panel badly corroded.
2-13/(2-14 blank)
TM 11-5805-246-10
Section Ill OPERATION UNDER USUAL CONDITIONS
Subject
Assembly and Preparation For Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Unpacked Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
initial Adjustments and Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate Telephone-Teletypewriter Transmission Over Two-Wire Circuit . . . . . . . .
Two-Wire Circuit With Push-to-Talk Radio Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four-Wire Circuit With One-Way Reversible Teletypewriter Transmission . . . . . . . .
Four-Wire Circuit With Push-to-Talk Radio Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four-Wire Circuit With Full Duplex Teletypewriter Transmission . . . . . . . . . . . . . . .
Typical Telegraph Terminal Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-Wire Alternate Telephone-Teletypewriter Operation Point-to-Point . . . . . . . . . .
Two-Wire Alternate Telephone-Teletypewriter Operation Over Local
Battery Switchboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-Wire Alternate Telephone-Teletypewriter Operation Over Common
Battery Switchboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two-Wire Teletypewriter Operation Over Push-to-Talk Radio . . . . . . . . . . . . . . . . . . .
Four-Wire Circuit Half-Duplex Teletypewriter Operation Overtire. . . . . . . . . . . . . .
Four-Wire Circuit Half-Duplex Teletypewriter Operation Over Pushto-Talk Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four-Wire Circuit Full Duplex Teletypewriter Operation Over Two-Way Radio . . . . .
Four-Wire Full Duplex Teletypewriter Operation Over Two-Way Radio . . . . . . . . . . .
Standby Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shutdown Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation of Auxiliary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation For Movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Para
Page
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-15
2-18
2-20
2-28
2-30
2-32
2-34
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2-38
2-40
2-13
2-42
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2-50
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2-54
2-56
2-58
2-60
2-62
2-64
2-3. ASSEMBLY AND PREPARATION FOR USE.
When a single piece of equipment is packed for shipment, the telegraph terminal is placed in a
water resistant fiberboard container and sealed. When shipped in quantity, separate fiberboard
containers are packed in a wooden box reinforced with steel straps. Unpack the equipment in a
sheltered area as close as possible to the site of operation. Equipment can be damaged by
careless unpacking procedures. Be careful when using cutting tool on any container.
2-15
TM 11-5805-246-10
2-3. ASSEMBLY AND PREPARATION FOR USE. (CONT)
This task covers:
Preparation for use
INITIAL SETUP
Personnel Required
Tools
One technician
Tool Kit, Electronic Equipment
TK-100/G
Equipment Condition
Materials/Parts
Not in operation
None
ITEM
LOCATION
ACTION
REMARKS
WARNING
Wear heavy gloves and protective eye wear when cutting
straps.
1.
Top of wooden box
2.
Steel straps (1)
Cut straps and fold back.
Nails (2)
Using nail puller, remove.
3.
Below top of
wooden box
Fiberboard
container (3)
Lift each container out of box.
4.
Top of fiberboard
container
Pressure sensitive
tape (4)
Using knife, cut.
5.
Around unit
Fiberboard pads (5)
Remove pads from equipment.
6.
Inside fiberboard
container
Running spares (6)
Remove running spares.
7.
Sides of package
Running spares
container (6)
Fold back sides of container and remove
contents.
8.
Top of fiberboard
container
Technical
manual (7)
Remove.
9.
Inside fiberboard
container
Telegraph
terminal (8)
Remove.
2-16
TM 11-5805-246-10
2-3. ASSEMBLY AND PREPARATION FOR USE. (CONT)
2-17
TM 11-5805-246-10
2-4. CHECKING UNPACKED EQUIPMENT.
This task covers:
Checking unpacked equipment
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Not in operation
None
ITEM
LOCATION
ACTION
REMARKS
1. Sides of unit
Carry sling (1)
Loosen sling, check for rips.
2. Between cover
and unit
Spring
fastener (2)
Release.
3. Top of unit
Cover assembly (3)
Open and check action.
4. Inside of cover
Spare fuse
holder (4)
Check for damage or insecure mounting.
5. Front of unit
Power cord (5)
Unwind and inspect for damage.
6. Below fuse cap
Fuse (6)
Remove fuse. Check for damage, correct size
(1-1/2 ampere) and proper installation.
7. Front panel
Binding posts (7)
Check action.
8.
Switches (8)
Check action.
9.
Glowlamp (9)
Unscrew lens. Check glowlamp for damage
and proper installation.
Five spare
fuses (10)
Check quantity and for proper size (1-1/2
ampere).
10. Cover assembly
(inside)
2-18
TM 11-5805-246-10
2-4. CHECKING UNPACKED EQUIPMENT. (CONT)
2-19
TM 11-5805-246-0
2-5. INITIAL ADJUSTMENTS AND SELF-TEST.
This task covers:
Initial adjustments and self-test
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment off
Telephone Set TA-312/PT
NSN 5805-00-543-0012
Teletypewriter TG-7A
NSN 5805-00-198-9029
LOCATION
ITEM
ACTION
REMARKS
1. Telegraph terminal
and teletypewriter
Red plug (1)
Black plug (2)
Gray plug (3)
SEND jack (4)
SEND jack (5)
Rec jack (6)
Connect teletypewriter by putting black plug
into SEND, gray plug into SEND, red plug
into REC jack.
2. Telegraph terminal
Binding posts
4 and 6 (7)
Connect telephone set leads.
3.
NORM-REC-SEND
switch (8)
Set to NORM.
4.
4W-2W-TEL
switch (9)
Set to 2W.
AC motor
switch (10)
Set to ON.
Teletypewriter runs open.
Power cord (11)
Connect to 115 vac source.
Teletypewriter runs closed and glow.
lamp lights on TH-5/TG.
5.
Teletypewriter
6. Telegraph terminal
2-20
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
2-21
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
LOCATION
ITEM
ACTION
REMARKS
7. Teletypewriter
Keyboard (1)
Type letters R and Y.
Observe error free copy. Glowlamp on
TH-5/TG will go out. Varying tone is
heard in telephone receiver.
8.
Keyboard (1)
Stop typing.
Steady tone is heard in telephone
receiver for 3 seconds. When tone stops
glowlamp on TH-5/TG will light.
9. Telegraph terminal
RING switch (2)
Hold down.
Ringing signal is heard in telephone
receiver and glowlamp flickers.
10.
NORM-REC-SEND
switch (3)
Set to SEND.
Steady tone is heard in telephone
receiver and glowlamp will go out.
11. Teletypewriter
Keyboard (1)
Type letters R and Y.
Observe error free copy. Varying
tone is heard in telephone receiver.
12.
NORM-REC-SEND
switch (3)
Set to REC.
No tone in telephone receiver, glowlamp will light, and teletypewriter
transmission is not possible.
NORM-REC-SEND
switch (3)
Set to NORM.
No tone is heard In telephone
receiver.
13.
2-22
Telegraph terminal
TM 11-5805-246-10
2-6. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
2-23
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
LOCATION
ITEM
ACTION
REMARKS
14. Telegraph terminal
4W-2W-TEL
switch (1)
Set to TEL.
15.
Keyboard (2)
Press break key.
Tone is not heard in telephone
receiver and teletypewriter runs open.
16.
Keyboard (2)
Type letters R and Y.
Observe error free copy. Glowlamp
on TH-5/TG will go out. Varying tone
is heard in telephone receiver.
17.
Keyboard (2)
Stop typing.
Steady tone is heard in telephone
receiver for 3 seconds. When tone
stops, glowlamp on TH-5/TG will light.
RING switch (3)
Hold down.
Ringing signal is heard in telephone
receiver and glowlamp flickers.
19.
Binding posts
2 and 3 (4)
Connect a wire stripped on both ends from
binding post 2 to binding post 3.
20.
NORM-REC-SEND
switch (5)
Set to SEND.
Glowlamp will go out.
21. Telephone set
Lead (6), lead (7)
and binding posts
1 and 4 (8)
a. Connect telephone leads by pushing binding
posts in and attaching leads.
Steady tone will be heard in
telephone receiver.
b. Disconnect leads.
18.
2-24
Teletypewriter
Telegraph terminal
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
2-25
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
LOCATION
ITEM
ACTION
REMARKS
22. Telephone set
Lead (1), lead
(2) and binding
posts 2 and 4 (3)
a. Connect telephone leads by pushing binding
posts in and attaching leads.
Steady tone will be heard in
telephone receiver.
b. Disconnect leads.
23.
Lead (1), lead
(2) and binding
posts 3 and 4 (4)
Connect telephone leads by pushing binding
posts in and attaching leads.
Steady tone will be heard in
telephone receiver.
24. Teletypewriter
Keyboard (5)
Type letters R and Y.
Observe error free copy, and a
varying tone is heard in telephone
receiver, with telephone leads
connected.
25. Telegraph terminal
NORM-REC-SEND
switch (6)
Set to REC.
Glowlamp will light.
26. Telephone set
Lead (1), lead (2)
and binding posts
2 and 4 (3)
Connect telephone leads by pushing binding
posts in and attaching leads.
No tone is heard in telephone
receiver. Teletypewriter transmission
is not possible.
27. Teletypewriter
AC motor
switch (8)
Set to OFF.
Teletypewriter stops.
28. Telegraph terminal
Power cord (9)
Remove from power source.
Glowlamp will go out.
2-26
TM 11-5805-246-10
2-5. INITIAL ADJUSTMENTS AND SELF-TEST. (CONT)
2-27
TM 11-5805-246-10
2-6. ALTERNATE TELEPHONE-TELETYPEWRITER TRANSMISSION OVER TWO-WIRE CIRCUIT.
All connections and control settings are made on the front panel of the telegraph terminal.
Jacks are provided for connecting the teletypewriter. Binding post connections and control
settings are determined by the type of transmission circuit used.
This task covers:
Transmission
INITIAL SETUP
Tools
Personnel Required
One technician
None
Equipment Condition
Materials/Parts
None
Equipment on
LOCATION
ITEM
ACTION
REMARKS
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3. Teletypewriter
Gray plug (3)
Put gray plug into SEND jack.
4.
Black plug (4)
Put black plug into SEND jack.
5.
Red plug (5)
Put red plug into REC jack.
NOTE
Telephone transmission is not possible when telegraph
terminal is connected to a carrier terminal using a two-wire
circuit. When connected to common battery switchboard,
operate 4W-2W-TEL switch to TEL.
2-28
TM 11-5805-246-10
2-6. ALTERNATE TELEPHONE-TELETYPEWRITER TRANSMISSION OVER TWO-WIRE CIRCUIT. (CONT)
LOCATION
ITEM
ACTION
REMARKS
6. Telegraph terminal
control panel
Binding posts
4 and 6 (6)
Connect local battery switchboard lines or two
wire line.
7.
Binding posts
3 and 5 (7)
Connect telephone set leads.
NOTE
When connected to common battery switchboard, set
4W-2W-TEL switch to TEL and have organizational maintenance
install an internal wire strap.
2-29
TM 11-5805-246-10
2-7. TWO-WIRE CIRCUIT WITH PUSH-TO-TALK RADIO LINK.
This task covers:
Transmission
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Control Unit RM-39, main component of
Remote Control Equipment RC-289
LOCATION
ITEM
Equipment connected to Control
Unit RM-39
ACTION
REMARKS
NOTE
A remote control unit such as Control Unit RM-39 is required
when the TH-5/TG is used with push-to-talk radio on a two
wire circuit. Refer to TM 11-2887 for information concerning
connections to Control Unit RM-39.
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
Gray plug (3)
Put gray plug into SEND jack.
4.
Black plug (4)
Put black plug into SEND jack.
5.
Red plug (5)
Put red plug into REC jack.
3.
2-30
Teletypewriter
TM 11-5805-246-10
2-7. TWO-WIRE CIRCUIT WITH PUSH-TO-TALK RADIO LINK. (CONT)
2-31
TM 11-5805-246-10
2-8. FOUR-WIRE CIRCUIT WITH ONE-WAY REVERSIBLE TELETYPEWRITER TRANSMISSION.
This task covers:
Transmission
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment on
4-wire line or TG carrier terminal
LOCATION
ITEM
ACTION
REMARKS
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 4W.
Gray plug (3)
Put gray plug into SEND jack.
4.
Black plug (4)
Put black plug into SEND jack.
5.
Red plug (5)
Put red plug into REC jack.
3.
Teletypewriter
NOTE
When using 4-wire line, the send pair is usually colored
green and black, the receive pair is usually colored red,
white, or yellow. If TG carrier terminal does not match
above color code, refer to the proper TM for connection
instructions.
2-32
TM 11-5805-246-10
2-3. FOUR-WIRE CIRCUIT WITH ONE-WAY REVERSIBLE TELETYPEWRITER TRANSMISSION. (CONT)
LOCATION
ITEM
ACTION
REMARKS
6. Telegraph terminal
control panel
Binding posts
3 and 4 (6)
Connect send leads of four-wire line or TG
carrier terminal.
7.
Binding posts
5 and 6 (7)
Connect receive leads of four-wire line or TG
carrier terminal.
2-33
1
TM 11-5805-246-10
2-9. FOUR-WIRE CIRCUIT WITH PUSH-TO-TALK RADIO LINK.
This task covers:
Transmission
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment on
Jumper wire
Radio receiver and transmitter
LOCATION
1.
Telegraph terminal
control panel
ITEM
ACTION
REMARKS
NORM-REC-SEND
switch (1)
Set to SEND.
4W-2W-TEL
switch (2)
Set to 4W.
Gray plug (3)
Put gray plug into SEND jack.
4.
Black plug (4)
Put black plug into SEND jack.
5.
Red plug (5)
Put red plug into REC jack.
Binding posts
2 and 3 (6)
Connect a wire stripped on both ends from
binding post 2 to binding post 3.
2.
3.
6.
2-34
Teletypewriter
Telegraph terminal
control panel
TM 11-5805-246-10
2-9. FOUR-WIRE CIRCUIT WITH PUSH-TO-TALK RADIO LINK. (CONT)
LOCATION
ITEM
ACTION
REMARKS
7. Telegraph terminal
Binding posts
5 and 6 (7)
Connect receive leads of push-to-talk radio
receiver.
8.
Binding posts 1,
2, 3, and 4 (8)
Connect send leads of push-to-talk radio
transmitter.
2-35
TM 11-5805-246-10
2-10. FOUR-WIRE CIRCUIT WITH FULL DUPLEX TELETYPEWRITER TRANSMISSION.
This task covers:
Transmission
INITIAL SETUP
Tools
Personnel Required
One technician
None
Equipment Condition
Materials/Parts
Equipment on
4-wire line or TG carrier terminal
LOCATION
ITEM
ACTION
REMARKS
NOTE
Have organizational maintenance remove home copy strap.
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
NOTE
When using two-way radio set, NORM-REC-SEND switch is set
to SEND.
2.
4W-2W-TEL
switch (2)
3. Teletypewriter
Gray plug (3)
Put gray plug into SEND jack.
4.
Black plug (4)
Put black plug into SEND jack.
5.
Red plug (5)
Put red plug into REC jack.
NOTE
When using 4-wire line, the send pair is usually colored red,
green and black, the receive pair is usually colored red,
white, or yellow. If TG carrier terminal does not match
above color code, refer to the proper TM for connection
instructions.
2-36
TM 11-5820-246-10
2-10. FOUR-WIRE CIRCUIT WITH FULL DUPLEX TELETYPEWRITER TRANSMISSION. (CONT)
LOCATION
ITEM
ACTION
REMARKS
6. Telegraph terminal
control panel
Binding posts
3 and 4 (6)
Connect send leads of four-wire line or TG
carrier terminal.
7.
Binding posts
5 and 6 (7)
Connect receive leads of four-wire line or TG
carrier terminal.
2-37
TM 11-5805-246-10
2-11. TYPICAL TELEGRAPH TERMINAL ARRANGEMENTS.
2-38
TM 11-5805-246-10
2-11. TYPICAL TELEGRAPH TERMINAL ARRANGEMENTS. (CONT)
2-39
TM 11-5805-246-10
2-1 2. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION POINT-TO-POINT.
This task covers:
1. Telephone signaling
2. Teletypewriter signaling
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment connected.
See paragraph 2-6.
None
LOCATION
ITEM
ACTION
REMARKS
TELEPHONE SIGNALING
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to TEL
3. Telephone set
Hand generator (3)
Use hand generator to signal distant station.
2-40
TM 11-5805-246-10
2-12. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION POINT-TO-POINT. (CONT)
LOCATION
ITEM
ACTION
REMARKS
TELETYPEWRITER SIGNALING
1.
Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3.
Ring switch (4)
Hold down for signaling distant stations.
Glowlamp (5)
Wait until glowlamp lights before starting
or resuming transmission.
4.
Telegraph terminal
2-41
TM 11-5805-246-10
2-13. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION OVER LOCAL BATTERY
SWITCHBOARD.
This task covers:
1. Station 1 transmit
2. Station 2 receive
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment connected. See
paragraph 2-6.
None
LOCATION
ITEM
ACTION
REMARKS
STATION 1 TRANSMIT
1.
Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3.
RING switch (3)
Hold RING switch down to signal station 2.
4.
Glowlamp (4)
Glowlamp will go out when station 2
acknowledges RING signal.
Wait until glowlamp lights before
starting or continuing transmission.
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3. Teletypewriter
Keyboard (5)
Acknowledge by typing on teletypewriter keyboard. Stop typing to receive message.
STATION 2 RECEIVE
2-42
TM 11-5805-246-10
2-13. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION OVER LOCAL BATTERY
SWITCHBOARD. (CONT)
STATION 2 RECEIVE (CONT)
NOTE
To signal Station 1, hold RING switch down for 3 seconds.
seconds.
2-43
TM 11-5805-246-10
2-14. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION OVER COMMON BATTERY
SWITCHBOARD.
This task covers:
1. Station 1 transmit
2. Station 2 receive
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materiais/Parts
Equipment connected.
See paragraph 2-6.
None
LOCATION
ITEM
ACTION
REMARKS
STATION 1 TRANSMIT
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W. This automatically signals
switchboard.
3. Telegraph terminal
Glowlamp (3)
Wait until glowlamp lights before starting
or continuing transmission.
Glowlamp will go out when station 2
acknowledges RING signal.
4.
4W-2W-TEL
switch (2)
Set to TEL when transmission is completed.
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3. Teletypewriter
Keyboard (4)
Acknowledge incoming signal by typing or
teletypewriter keyboard.
Stop typing to receive message.
STATION 2 RECEIVE
2-44
TM 11-5605-246-10
2-14. TWO-WIRE ALTERNATE TELEPHONE-TELETYPEWRITER OPERATION OVER COMMON BATTERY
SWITCHBOARD. (CONT)
STATION 2 RECEIVE (CONT)
NOTE
To signal station 1 hold RING switch down for 3 seconds.
seconds.
2-45
TM 11-5805-246-10
2-15. TWO-WIRE TELETYPEWRITER OPERATION OVER PUSH-TO-TALK RADIO.
This task covers:
1. Transmitting
2. Receiving
lNITIAL SETUP
Tools
Personnel Required
None
One technician
Materials/Parts
Equipment Condition
Control Unit RM-39, main component
of Remote Control Equipment
RC-289
LOCATION
Equipment connected to Control
Unit RM-39.
ITEM
ACTION
REMARKS
NOTE
A remote control unit is required for this type of operation.
See paragraph 2-7. NORM-REC-SEND switch in SEND position
turns on radio transmitter through the remote control
unit.
TRANSMITTING
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 2W.
3.
Glowlamp (3)
Begin transmission after lamp is out. Do
not use RING switch.
2-46
TM 11-5805-246-10
2-15. TWO-WIRE TELETYPEWRITER OPERATION OVER PUSH-TO-TALK RADIO. (CONT)
2-47
TM 11-5805-246-10
2-15. TWO-WIRE TELETYPEWRITER OPERATION OVER PUSH-TO-TALK RADIO. (CONT)
LOCATION
ITEM
ACTION
REMARKS
NOTE
NORM-REC-SEND switch set to NORM position disables radio
transmitter and turns on receiver through remote control
unit.
RECEIVING
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
Glowlamp (2)
When the NORM-REC-SEND switch is set to
NORM position, the glowlamp will light.
2-48/(2-49 blank)
TM 11-5805-246-10
2-16. FOUR-WIRE CIRCUIT HALF-DUPLEX TELETYPEWRITER OPERATION OVER WIRE.
This task covers:
1. Transmitting
2. Receiving
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment connected.
See paragraph 2-8.
None
LOCATION
ITEM
ACTION
REMARKS
TRANSMlTTlNG
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 4W.
3.
RING switch (3)
Hold down for 3 seconds to signal or break
transmission from the distant station.
4.
Glowlamp (4)
Wait until lit before starting or continuing
transmission.
1.
Telegraph terminal
control panel
NOTE
If teletypewriter runs open, stop typing.
RECEIVING
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 4W.
3.
Glowlamp (4)
Wait until lit before starting or continuing
transmission.
2-50
TM 11-5805-246-10
2-16. FOUR-WIRE CIRCUIT HALF-DUPLEX TELETYPEWRITER OPERATION OVER WIRE. (CONT)
RECEIVING (CONT)
NOTE
Four-wire, one-way reversible teletypewriter operation is the
same as half duplex except that there is no break in feature.
2-51
TM 11-5805-246-10
2-17. FOUR-WIRE CIRCUIT HALF-DUPLEX TELETYPEWRITER OPERATION OVER PUSH-TO-TALK
RADIO.
This task covers:
1. Transmitting
2. Receiving
INITIAL SETUP
Tools
Personnel Required
None
One technician
Materials/Parts
Equipment Condition
Equipment connected.
See paragraph 2-9.
None
LOCATION
ITEM
ACTION
REMARKS
TRANSMITTING
1.
Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to SEND.
NOTE
Setting NORM-REC-SEND switch to SEND automatically turns
on radio transmitter and disables receiver.
2.
4W-2W-TEL
switch (2)
Set to 4W.
3.
RING switch (3)
Hold down to signal the distant station only
if distant station has a vf ringer.
4.
Glowlamp (4)
Begin transmission after glowlamp goes out.
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to REC.
2.
Glowlamp (4)
RECEIVING
2-52
While NORM-REC-SEND switch is set to REC
position, the glowlamp will be lit.
TM 11-5805-246-10
2-17. FOUR-WIRE CIRCUIT HALF-DUPLEX TELETYPEWRITER OPERATION OVER PUSH-TO-TALK
RADIO. (CONT)
RECEIVING (CONT)
NOTE
Setting the NORM-REC-SEND switch to REC automatically
disables the radio transmitter and turns on the receiver.
2-53
TM 11-5805-246-10
2-18. FOUR-WIRE CIRCUIT FULL DUPLEX TELETYPEWRITER OPERATION OVER TWO-WAY RADIO.
This task covers:
Four-wire circuit
INITIAL SETUP
Personnel Required
Tools
One technician
None
Materials/Parts
Equipment Condition
Equipment connected.
See paragraph 2-9.
None
LOCATION
ITEM
ACTION
REMARKS
1. Telegraph terminal
control panel
NORM-REC-SEND
switch (1)
Set to NORM.
2.
4W-2W-TEL
switch (2)
Set to 4W.
3.
RING switch (3)
Use RING switch to signal the distant station
only if a vf ringer is a component of that
system.
4.
Glowlamp (4)
Transmission is possible when lamp is on or
off.
NOTE
Full duplex operation refers to sending and receiving between
two points in both directions at the same time. Home copy is
not possible during this time because internal home copy
strap has been removed.
2-54
TM 11-5805-246-10
2-18. FOUR-WIRE CIRCUIT FULL DUPLEX TELETYPEWRITER OPERATION OVER TWO-WAY RADIO. (CONT)
2-55
TM 11-5805-246-10
2-19. FOUR-WIRE FULL DUPLEX TELETYPEWRITER OPERATION OVER TWO-WAY RADIO.
This task covers:
Two-way radio circuit
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment connected.
See paragraph 2-9.
None
LOCATION
ITEM
ACTION
REMARKS
NORM-REC-SEND
switch (1)
Set to SEND.
2.
4W-2W-TEL
switch (2)
Set to 4W.
3.
RING switch (3)
Use RING switch to signal the distant station
only if a vf ringer is a component of that
system.
4.
Glowlamp (4)
Transmission is possible when lamp is on or
off.
1.
Telegraph terminal
control panel
NOTE
Full duplex operation refers to sending and receiving between
two points in both directions at the same time. Home copy is
not possible during this time because internal home copy
strap has been removed.
2-56
TM 11-5805-246-10
2-19. FOUR-WIRE FULL DUPLEX TELETYPEWRITER OPERATION OVER TWO-WAY RADIO. (CONT)
2-57
TM 11-5805-246-10
2-20. STANDBY PROCEDURE.
This task covers:
Standby Procedure
INITIAL SETUP
Personnel Required
Tools
One technician
None
Materials/Parts
Equipment Condition
Not in operation
None
LOCATION
ITEM
ACTION
REMARKS
1. Front panel
4W-2W-TEL
switch (1)
Set to TEL.
During two-wire teletypewriter operation over common battery switchboard.
2.
NORM-REC-SEND
switch (2)
3.
NORM-REC-SEND
switch (2)
Set to NORM.
During two-wire teletypewriter operation over push-talk radio.
Set to REC.
During four-wire operation.
2-58
TM 11-5805-246-10
2-20. STANDBY PROCEDURE. (CONT)
2-59
TM 11-5805-246-10
2-21. SHUTDOWN PROCEDURE.
This task covers:
Shutdown procedure
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment on
None
LOCATION
ITEM
ACTION
REMARKS
1. Teletypewriter
AC motor
switch (1)
Set AC motor switch to OFF.
Teletypewriter stops typing.
2. Telegraph terminal
control panel
Power cord (2)
Remove power cord from power source.
3.
Glowlamp (3)
Glowlamp will be off.
2-60
TM 11-5805-246-10
2-21. SHUTDOWN PROCEDURE. (CONT)
2-61
TM 11-5805-246-10
2-22. OPERATION OF AUXILIARY EQUIPMENT.
This task covers:
1.
2.
3.
4.
Mounting telegraph terminal
Using prefabricated racks
Using remote control unit
Using line control unit
INITIAL SETUP
Personnel Required
Tools
None
One technician
Materials/Parts
Equipment Condition
Mounting MT-791/U
Equipment off
LOCATION
ITEM
ACTION
REMARKS
MOUNTING TELEGRAPH TERMINAL
1. Base of mounting
Grounding
strap (1)
Check that grounding strap is secure.
2. Front of mount
Locking
handles (2)
Push in locking handles on front of mounting.
3. Telegraph terminal
cover
Luggage catch (3)
Unlatch and raise cover assembly on terminal.
4. Bottom of converter
case
Tracks (4)
Set tracks on bottom of converter case in
grooves of mounting.
5. Front of mount
Locking
handles (2)
Pull locking handles forward. Make sure
that mounting clamps hold unit securely.
2-62
TM 11-5805-246-10
2-22. OPERATION OF AUXILIARY EQUIPMENT. (CONT)
USING PREFABRICATED RACKS
When two or more units are needed in a shelter, prefabricated racks are sometimes used. These racks
are usually lined with a cushioning material which may require the removal of the telegraph terminal
transit case before installation. Removal is to be performed by the organization technician.
USING REMOTE CONTROL UNIT
The telegraph terminal can be used with Remote Control Unit RM-39. Refer to TM 11-2667 for
connection information.
USING LINE CONTROL UNIT
The telegraph terminal can be used with a line control unit such as Telegraph Line Control Unit
C-2894/FG. Refer to TM 11-5805-204-15 for connection information.
2-63
TM 11-5805-246-10
2-23. PREPARATION FOR MOVEMENT.
This task covers:
Preparation for movement
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment off
None
LOCATION
Telegraph terminal
control panel
ITEM
ACTION
REMARKS
Power plug (1)
Disconnect from power source.
2.
Teletypewriter
cord jacks (2)
Remove the teletypewriter plugs from the
SEND and REC jacks.
3.
Binding posts (3)
Remove all transmission wires from binding
posts.
4. Front of mounting
MT-791/U
Locking handles (4)
Push in and lift the unit from mounting.
1.
If the front panel chassis assembly has been removed from the
transit case, report to a higher level of maintenance.
5. Telegraph terminal
control panel
Power cord (5)
Wind and stow against the front panel.
6. Telegraph terminal
converter case
Running spares
and technical
manuals
Assemble running spares and technical
manuals.
2-64
TM 11-5805-246-10
2-23. PREPARATION FOR MOVEMENT. (CONT)
LOCATION
7.
ITEM
Latch and
cover assembly (6)
ACTION
REMARKS
Close. When the cover Is closed, the equipment is waterproof.
2-65
TM 11-5805-246-10
Section IV OPERATION UNDER UNUSUAL CONDITIONS
Subject
Operation Under Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Para
Page
2-24
2-25
2-26
2-66
2-66
2-66
2-24. OPERATION UNDER UNUSUAL CONDITIONS.
COLD CLIMATES
Keep the telegraph terminal warm and dry. Operate the equipment continuously, if possible. Tube
filaments will furnish some heat.
When the equipment has been exposed to low temperatures and then is brought into a warm room,
condensation will form on the inside and outside surfaces. Wait for condensation to dry before
placing equipment in operation.
HOT DRY CLIMATES
Protect the telegraph terminal from sand, dust, and strong sunlight. Clean and dust the outside
surfaces often.
Whenever installation permits, keep equipment in its case to protect components from sand and
dust.
WARM, DAMP Climates
Protect equipment from humidity and fungus.
Remove moisture and fungus from outside surfaces with lint free cloth.
2-25. FORDING.
Before: Close and latch cover assembly. When cover is closed the equipment is waterproof.
During: Keep latch and cover assembly closed.
After: Dry exterior with lint-free cloth.
2-26. EMERGENCY PROCEDURES.
If an emergency occurs, disconnect power cord from power source.
2-66
TM 11-5805-246-10
CHAPTER 3
MAINTENANCE INSTRUCTIONS
Section
Subject
Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
Page
3-1
3-2
3-5
OVERVIEW
This chapter contains maintenance instructions for the telegraph terminal.
Section I LUBRICATION INSTRUCTIONS
3-1. LUBRICATION INSTRUCTIONS
The telegraph terminal does not require lubrication.
3-1
TM 11-5805-246-10
Section Il TROUBLESHOOTING
Subject
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symptom Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Para
Page
3-2
3-2
3-2
3-3
3-2. OVERVIEW
The table lists common problems which you may find during the operation or maintenance of the
telegraph terminal or its components. You should perform the tests/inspections and corrective
actions in the order listed.
This manual cannot Iist all malfunctions that may occur, nor all tests, inspections, or
corrective actions. If a malfunction is not Iisted or is not corrected by Iisted corrective
actions, notify your supervisor.
To prevent injury when performing troubleshooting procedures, all CAUTIONS and WARNINGS
must be observed. Always discharge capacitors before working on chassis assembly.
Capacitors may retain dangerous voltages when power cord is removed from power
source.
SYMPTOM INDEX
Telegraph Terminal
Does net work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Glowlamp
Does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Remote Control Unit
Does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Line Control Unit
Does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-2
TM 11-5805-246-10
TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
These procedures apply to both the TH-5/TG and the TH-5A/TG.
1. Telegraph terminal does not work.
Step 1.
Check that power cord is connected to power source and that it is not cut or
frayed.
Connect or report to higher level of maintenance.
Step 2.
Check fuse.
Replace 1.5 amp fuse. See paragraph 3-4.
3-3
TM 11-5805-246-10
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Glowlamp does not light
Step 1.
Check that power cord is connected to power source.
Connect to power source.
Step 2.
Check bulb.
Replace bulb. See paragraph 3-5.
3. Remote control unit does not operate.
See TM 11-2667 for information.
4. Line control unit does not operate.
See TM 11-5805-204-15 for information.
3-4
TM 11-5805-246-10
Section Ill MAINTENANCE PROCEDURES
Subject
Para
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Replacement of Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Replacement of Neon Glowlamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Checks/Adjustments/Alinement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Maintenance of Auxiliary Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Page
3-5
34
3-8
3-10
3-10
3-10
3-10
3-3. OVERVIEW.
Maintenance is the systematic care, inspection, and servicing of equipment to keep it in
serviceable condition, prevent breakdowns and ensure maximum operational condition.
3-5
TM 11-5805-246-10
3-4. REPLACEMENT OF FUSE.
This task covers:
1. Removal
2. Installation
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment off
Fuse, 1.5 amp
NSN 5920-00-199-9482
ITEM
LOCATION
ACTION
REMARKS
REMOVAL
1. Telegraph terminal
control panel
Fuse cap (1)
Remove.
2.
Fuse (2)
Remove.
INSTALLATION
CAUTION
Use only a 1.5 amp fuse. An improper fuse can cause damage
to telegraph terminal circuits.
1.
Fuse (2)
Install.
2.
Fuse cap (1)
Replace.
3-6
TM 11-5805-246-10
3-4. REPLACEMENT OF FUSE. (CONT)
3-7
TM 11-5805-246-10
3-5. REPLACEMENT OF NEON GLOWLAMP.
This task covers:
1. Removal
2. Installation
INITIAL SETUP
Personnel Required
Tools
One technician
None
Equipment Condition
Materials/Parts
Equipment off
Lamp
NSN 6240-00-155-8014
ITEM
LOCATION
ACTION
REMARKS
REMOVAL
1. Telegraph terminal
control panel
Lens (1)
Unscrew and remove.
2.
Glowlamp (2)
Release from base and remove.
1. Telegraph terminal
control panel
Glowlamp (2)
Install.
2.
Lens (1)
Replace and tighten.
Do not overtighten.
INSTALLATION
3-8
TM 11-5805-246-10
3-5. REPLACEMENT OF NEON GLOWLAMP. (CONT)
3-9
TM 11-5805-246-10
3-6.
CHECKS/ADJUSTMENT/ALINEMENTS.
Check controls for easy movement. Check that the teletypewriter is not placed more than 6 feet
away from telegraph terminal and that plugs are long enough to reach the telegraph terminal.
3-7. CLEANING.
Case should be kept free of dirt, grease, rust, fungus, and corrosion. Clean and dust the
outside surfaces frequently with a lint free cloth dampened with cleaning compound
(NSN 6850-00-984-5853).
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.
3-8. TESTING.
For test procedures, see paragraph 2-5 (Initial Adjustments and Self-Test).
3-9. MAINTENANCE OF AUXILIARY EQUIPMENT.
REMOTE CONTROL UNIT.
The telegraph terminal can be used with Remote Control Unit RM-39. See TM 11-2667 for
maintenance procedures.
LINE CONTROL UNIT.
The telegraph terminal can be used with a line control unit such as Telegraph Line Control Unit
C-2894/FG. See TM 11-5805-204-15 for maintenance procedures.
3-10
TM 11-5805-246-10
APPENDIX A
REFERENCES
A-1. SCOPE.
This appendix lists all forms, field manuals, technical manuals, and miscellaneous publications
referenced in this manual.
A-2. FIELD MANUALS.
Military Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 21-5
Techniques of Military Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 21-6
Military Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 21-30
A-3. TECHNICAL MANUALS.
Remote Control Equipment RC-289 and
Receiver Transmitter Control Group
AN/GRW-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 11-2667
Operator’s, Organizational, Field and Depot Maintenance Manual:
Terminal, Telegraph-Telephone AN/TCC-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5805-254-15
Operator’s, Organizational, Direct Support, General Support and
Depot Maintenance Manual (Including Repair Parts and Special Tools
List): Panel Patching Communication SB-611/MRC . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5805-204-15
Procedures for Destruction of Electronics Materiel to Prevent Enemy
Use (Electronics Command) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 750-244-2
A-4. MISCELLANEOUS PUBLICATIONS.
lndex of Army Motion Pictures, Filmstrips,
Slides, and Phono-Recordings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DA Pam 310 Series
Military Publications: Index of Supply
Manuals; Signal Corps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DA PAM 310 Series
Dictionary of United States Army Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SR 320-5
Authorized Abbreviations and Brevity Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SR-320-50
Consolidated lndex of Army Publications and Blank Forms . . . . . . . . . . . . . . . . . . .
DA PAM 310-1
A-1/(A-2 blank)
TM 11-5805-246-10
APPENDIX B
COMPONENTS OF END ITEM LIST
Section I. lNTRODUCTION
B-1.
Scope
This appendix lists integral components of and basic issue items for the Telegraph Terminal TH-5/TG and TH5A/TG to help you inventory items required for safe and efficient operation.
B-2. General
This Components of End Item List is divided into the following sections:
a. Section II. Integral Components of the End Item. These items, when assembled, comprise the TH-5/TG and
TH-5A/TG and must accompany it whenever it is transferred or turned in. The illustrations will help you identify
these items.
b. Section III. Basic Issue Items. These are the minimum essential items required to place the TH-5/TG and TH5A/TG in operation, to operate it, and to perform emergency repairs. Although shipped separately packed they
must accompany the TH-5/TG and TH-5A/TG during operation and whenever it is transferred between accountable officers. The illustrations will assist you with hard-to-identify items. This manual is your authority to requisition replacement Bll, based on TOE/MTOE authorization of the end item.
B-3. Explanation of Columns
a. Illustration. This column is divided as follows:
(1) Figure number. Indicates the figure number of the illustration on which the item is shown.
(2) Item number. The number used to identify item called out in the illustration.
b. National Stock Number. Indicates the National stock number assigned to the item and which will be used
for requisitioning.
c. Part Number. Indicates the primary number used by the manufacturer, which controls the design and
characteristics of the item by means of its engineering drawings, specifications, standards, and inspection requirements to identify an item or range of items. Following the part number, the Federal Supply Code for
Manufacturers (FSCM) is shown in parentheses.
d. Description. lndicates the Federal item name and, if required, a minimum description to identify the item.
e. Location. The physical location of each item listed is given in this column. The lists are designed to inventory all items in one area of the major item before moving on to an adjacent area.
f. Usable on Code. Not applicable.
g. Quantity Required (Qty Reqd). This column lists the quantity of each item required for a complete major
item.
h. Quantity. This column is left blank for use during an inventory. Under the Rcvd column, list the quantity you
actually receive on your major item. The Date columns are for your use when you inventory the major item at a
later date; such as for shipment to another site.
B-1
TM 11-5805-246-10
Section II COMPONENTS OF END ITEM
(1)
ILLUS
NO
(2)
NATIONAL
STOCK NUMBER
1
5805-00-315-2858
5805-00-246-8734
1
2
B-2
(3)
DESCRIPTION
FSCM AND PART NUMBER
(4)
USABLE
ON CODE
(5)
U/M
QTY
REQ’D
Telegraph Terminal,
(80058) or (80063), TH-5/TG
EA
1
5805-00-020-5720
Telegraph Terminal,
(80058) TH-5A/TG
EA
1
5805-00-186-9464
Mounting, (80058), MT-791/U
EA
1
TM 11-5805-246-10
Section Ill BASIC ISSUE ITEMS
(3)
DESCRIPTION
FSCM AND PART NUMBER
(1)
ILLUS
NO
(2)
NATIONAL
STOCK NUMBER
1
5805-00-615-6503
Case, Electrical
Equipment Cabinet (less
cover and straps),
(80063), SC-D-98317
2
5805-00-625-5418
Cover Assembly (P/O
Case, Electrical Equip
Cabinet) installed in
equip. (80063) SC-C-98314
3
5960-00-519-7812
4
(4)
USABLE
ON CODE
(5)
U/M
QTY
REQ’D
EA
1
EA
1
Electron tube, (80131),
5726/6ALSW
EA
2
5960-00-539-7910
Electron tube, (9488), 6X4W
EA
1
5
5960-00-166-7663
Electron tube, (01362), 12AU7
EA
3
6
596040-166-7764
Electron tube, (01362), 12AX7
EA
2
7
5920-00-199-9482
Fuse one and one-half
amp, (71400), 3AGF1
EA
5
8
6240-00-223-9100
Glowlamp, (01808), NE 51
EA
1
9
6240-00-155-8014
Lamp, (24446), 6S600-125 (E7)
EA
1
B-3/(B-4 blank)
TM 11-5805-246-10
APPENDIX C
EXPENDABLE SUPPLIES AND MATERIALS LIST
Section I INTRODUCTION
C-1. SCOPE.
This appendix lists expendable supplies and materials you will need to operate and maintain
Telegraph Terminal TH-5/TG or TH-5A/TG. These items are authorized to you by CTA 50-970,
Expendable Items (Except Medical, Class V, Repair Parts, and Heraldic items).
C-2. EXPLANATION OF COLUMNS.
a . Column 1, Item number. This number is assigned to the entry in the listing and is
referenced in the narrative instructions to identify the material (e.g., Use Cleaning Compound,
Item 5, App. D).
b . Column 3. Level. This column identifies the lowest level of maintenance that requires the
listed item.
C - Operator/Crew
O - Organizational Maintenance/Aviation Unit Maintenance
F - Direct Support Maintenance/Aviation Intermediate Maintenance
H - General Support Maintenance
c. Column 3, National Stock Number.
use it to request or requisition the item.
This is the National stock number assigned to the item;
d. Column 4, Description. Indicates the Federal item name and, if required, a description to
identify the item. The last line for each item indicates the Federal Supply Code for
Manufacturer (FSCM) in parentheses followed by a part number.
e. Column 5. U/M (Unit of Measure). Indicates the measure used in performing the actual
maintenance function. This measure is expressed by a two-character alphabetical abbreviation
(e.g., ea, in, pr). If the unit of measure differs from the unit of issue, requestion the lowest
unit of issue that will satisfy your requirements.
C-1
TM 11-5805-246-10
Section II EXPENDABLE SUPPLIES AND MATERIALS LIST
LEVEL
(3)
NATIONAL STOCK
NUMBER
1
C
6850-00-984-5833
TrichlorotrifIuoroethane
OZ.
2
C
7920-00-924-5700
Cleaning cloth
EA.
3
C
5350-00-260-3485
Sandpaper
PKG.
C-2
(2)
(4)
(1)
ITEM
NUMBER
DESCRIPTION
U/M
TM 11-5805-246-10
GLOSSARY
ALTERNATING CURRENT
Electric current (waves) that continually changes in
amplitude and reverses polarity.
AMPERE
Basic unit of electrical current flow.
CARRIER
A wave of constant amplitude, frequency and phase
which can be modulated by changing amplitude,
frequency, or phase.
CONTINUOUS WAVE
Electric current (waves) of a constant amplitude
and frequency.
CURRENT
Flow of charge or rate of such flow.
DIRECT CURRENT (dc)
Electric current (waves) that flows in only one
direction and remains essentially constant in magnitude.
DUPLEX
Transmission and reception over teletypewriter
lines are possible at the same time.
FUSE
A device to open a circuit when excess current
exists in a circuit.
MARKING PULSE
Equal length pulses making up a code with spacing
elements.
NEUTRAL
In a normal condition; neither positive (+) nor
negative (-).
OSCILLATOR
Generates repetitive waveforms at a fixed or varying
frequency.
POWER SUPPLY CIRCUIT
Provides dc voltage to operate tubes. Power
transformer T6 changes 115 vac line voltage to
higher ac voltage and then is tube rectified
to dc. Also provides low voltage of 12.6 and 6.3
vac for tube filaments.
PULSE
A quick change in voltage, either positive or
negative which conveys information to a circuit.
RECEIVE
To receive a signal or message.
ECEPTACLE
An outlet to which the male end of a power cord is
inserted.
RECTIFIER CIRCUIT
Changes ac voltage to dc.
SPACING PULSE
Equal length pulses making up a code with marking
elements.
Glossary 1
TM 11-5805-246-10
GLOSSARY (CONT)
TRANSMIT
To send a signal or message.
THRESHOLD CIRCUIT
A circuit which cuts off a received telegraph signal
if its level is below -50 dbm.
VOLTAGE
Electromotive force, or pressure which causes
current to flow through an electrical conductor.
VOLTAGE DOUBLER
Multiplies voltage amplitude by two.
Glossary 2
TM 11-5805-246-10
INDEX
Subject
Page
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
AC Motor Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Adjustments
Alinements/checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Initial and self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Alinement/checks/adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
1.5 Amp Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary 1
Function and location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Arrangements, Typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Assembly, Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Auxiliary equipment
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
Basic lssue ltems List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Binding Post 1 thru 6
Function and location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Capabilities and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Case, Transit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-66, 3-10
Checks/adjustments/alinements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Circuit Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-66, 3-10
Components
End item. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Functions, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Checks/adjustments/alinementor maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Control Unit, Line C-2894/FG
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Control Unit, Remote RM-39
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Index 1
TM 11-5805-246-10
INDEX (CONT)
Subject
Page
Converter, Telegraph-Telephone Signal TA-182/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Cord, Power
Preparation for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15, 2-18
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Strain relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Cover Assembly Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Difference between models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Emergency procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
Equipment data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Equipment Improvement Recommendation (EAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Expendable Supplies and Materials List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Features and capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
First Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . follows warning page
Fording Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
Forms, records and reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Functions
Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Control and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Fuse, 1.5 amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3, Glossary 1
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Preventive Maintenance Check and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Gasket, waterproof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Generator, hand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary 1
Glowlamp, Neon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Inventor y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Replacement, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Hand generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Index 2
TM 11-5805-246-10
INDEX (CONT)
Subject
Page
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
of auxiliary equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Jacks
Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
REC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
SEND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Troubleshooting, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Line Control Unit C-2894/FG
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Under unusual conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-66
Mounting MT-791/U
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Movement, preparation for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Neon Glowlamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Nomenclature cross-reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
NORM-REC-SEND switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 2-20
Index 3
TM 11-5805-246-10
INDEX (CONT)
Subject
Page
Operation
of auxiliary equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
Principles of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Under unusual conditions,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
Under usual conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Packaging
and Handling deficiencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Posts, Binding, 1 thru 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Power cord
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Strain relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Power plug PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Power Transformer T6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Prefabricated racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Preparation for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Telegraph-Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5, 2-7, 2-13
Quick-release screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Racks, prefabricated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Radio link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Receiving sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
REC Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Rectifier shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Remote Control Unit RM-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Ring switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Ringer, vf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Index 4
TM 11-5808-246-10
INDEX (CONT)
Screws, quick-release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Self-test and initial adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Semiconductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
SEND jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Shutdown procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Standby procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Switch
AC motor (TTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
NORM-REC-SEND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Preventive Maintenance Checks and Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
4W-2W-TEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Switch positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Symptom index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Telegraph-Telephone Signal Converter TA-182/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Telegraph Terminal Mount MT-791/U
Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Telephone Set TA-312/PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Teletypewriter TG-7-A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Typical arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Transformer, Power, T6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Transit Case
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66, 3-10
Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Transmission
Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Typical arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Trichlorotrifluoroethane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Use for cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Typical arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Index 5
TM 11-5805-246-10
INDEX (CONT)
Subject
Page
Vacuum tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
vf Ringer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Voice frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Voltage
High Voltage Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lnside Front Cover
Line voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Warning page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside Front Cover
Waterproof gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
4W-2W-TEL switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Index 6
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