Tektronix 475 Manuale utente

TM 11-6625-2735-14-1

TECHNICAL MANUAL

OPERATOR’S, ORGANIZATIONAL,

DIRECT SUPPORT AND GENERAL

SUPPORT MAINTENANCE MANUAL

FOR

OSCILLOSCOPE OS-261B(V)1/U

(NSN 6625-01-101-1318)

(TEKTRONIX MODEL 475 WITH OPTION 04)

This copy is a reprint which includes

pages from Change 1. current

H E A D Q U A R T E R S, D E P A R T M E N T O F T H E A R M Y

JUNE 1982

CHANGE

No. 1

TM 11-6625-2735-14-1

C 1

HEADQUARTERS

DEPARTMENT OF THE ARMY

Washington, DC, 10 September 1984

OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND

GENERAL SUPPORT MAINTENANCE MANUAL

OSCILLOSCOPE OS-261B(V)1/U

(TEKTRONIX MODEL 475 WITH OPTION 04)

(NSN 6625-01-101-1318)

AND

OSCILLOSCOPE OS-261C(V)1/U

(TEKTRONIX MODEL 475 WITH OPTION 04

AND OPTION 07)

(NSN 6625-01-119-7314)

TM 11-6625-2735-14-1, 17 June 1982, is changed as follows:

1. Title of manual is changed as shown above.

2. New or changed material is indicated by a vertical bar in the margin of the page. Added or revised illustrations are

indicated by a vertical bar in front of the figure caption.

3. Remove old pages and insert new pages as indicated below:

Remove pages

i through iv

1-0

0-1

1-9 and 1-10

1-13/(1-14 blank)

2-1 and 2-2

6-1 and 6-2

None

7-3 and 7-4

7-15, 7-16 and 7-17/(7-18 blank)

A-1/(A-2 blank)

B-1 through B-5

D-1 through D-6

4. File this change sheet in the front of the publication.

Insert pages

C, D and E/F blank)

i through iv

0-0

0-1

1-9 and 1-10

1-13/(1-14 blank)

2-1 and 2-2

6-1 and 6-2

6-2.1 through 6-2.8

7-3 and 7-4

7-15, 7-16 and 7-17/(7-18 blank)

A-1/(A-2 blank)

B-1 through B-6

D-1 through D-6

By Order of the Secretary of the Army:

Official:

JOHN A. WICKHAM JR.

General, United States Army

Chief of Staff

ROBERT M. JOYCE

Major General, United States Army

The Adjutant General

To be distributed in accordance with DA Form 12-36B requirements for 0S-261.

TM 11-6625-2735-14-1

SAFETY SUMMARY

WARNING

This manual contains safety information which the user must follow to ensure safe operation of this

instrument. WARNING information is intended to protect the operator; CAUTION information is

intended to protect the instrument. The following general safety precautions must be observed during all

phases of operation, service, and repair of this instrument. Failure to comply with these precautions or

with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and

intended use of the instrument.

Warning statements precede potentially dangerous procedures throughout this manual. The instruc-

tions contained in the warnings must be followed. The following warning statements are found in this

manual:

Use a proper power source. This instrument is intended to be operated from a single-phase power

source. A suitable power source is one where both current-carrying conductors are ungrounded, since

over-current protection (fuse) is provided in both conductors. Operation from a grounded power source

is not recommended. If the fuse in the grounded conductor opens, the power-source voltage appears on

the internal primary wiring causing a possible shock hazard during troubleshooting.

Ground the instrument. This instrument has a three-wire power cord with a three-terminal polarized

plug for connection to the power source and safety-earth. The safety-earth terminal of the plug is directly

connected to the instrument frame. For electric-shock protection, insert this plug only in a mating outlet

with a safety-earth contact or otherwise connect the frame to a safety-earth system. Failure to complete

the ground system may allow the chassis of this instrument to be elevated above ground potential and

pose a shock hazard.

WARNING

Avoid live circuits. Dangerous voltages exist at several points throughout this instrument. When the

instrument is operated with the covers removed, do not touch exposed connections or components.

Some transistors have voltages present on their cases. Disconnect power before cleaning the instrument

or replacing parts.

Avoid contact with chemicals.

Handle silicone grease with care. Avoid getting silicone grease in eyes.

Wash hands thoroughly after use.

WARNING

Use care when handling the crt.

Protective clothing and safety glasses should be worn when handling

a crt. Avoid striking it on any object which might cause it to crack or implode. When storing a crt, place it

in a protective carton or set it facedown in a protected location on a smooth surface with a soft mat under

the faceplate to protect it from scratches.

TM 11-6625-2735-14-1

SAFETY SUMMARY (CONT.)

WARNING

Adequate ventilation should be provided while using TRICHLOROTRIFLUOROETHANE. Prolonged

breathing of vapor should be avoided. The solvent should not be used near heat or open flames; the

products of decomposition are toxic and irritating. Since TRICHLOROTRIFLUOROETHANE dissolves

natural oils, prolongted contact with skin should be avoided. When necessary, use gloves which the

solvent cannot penetrate. If the solvent is taken internally, consult a physician immediately.

WARNING

Compressed air shall not be used for cleaing purposes except where reduced to less than 29

pounds per square inch (psi) and then only with effective chip guarding and personnel protective

equipment. Do not use compressed air to dry parts when TRICHLOROTRIFLUOROETHANE has

been used. Compressed air is dangerous and can cause serious bodily harm if protective means

or methods are not observed to prevent chip or particle (of whatever size) from being blown into

the eyes or unbroken skin of the operator or other personnel.

CAUTION

Avoid crl phosphor damage. Crt phosphor damage can occur under adverse conditions. Avoid any

condition where an extremely bright, sharply focused spot exists on the crt.

TM 11-6625-2735-14-1

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

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 PERSONA SHORT

DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL

RESUSCITATION

Change 1 C

TM 11-6625-2735-14-1

WARNING

HIGH VOLTAGE

is used in the operation of this equipment

DEATH ON CONTACT

may result if personnel fail to observe safety precautions

Never work on electronic equipment unless there is another person nearby who is familiar with the

operation and hazards of the equipment and who is competent in administering first aid. When the

technician is aided by operators. They must be warned about dangerous areas.

Be careful not to contact high-voltage connections or 115 volt ac input connections when

installing or operating this equipment.

Whenever the nature of the operation permits, keep one hand away from the equipment to reduce

the hazard of current flowing through the body.

WARNING Do not be misled by the term “low voltage”. Potentials as low as

50 volts may cause death under adverse conditions.

For Artificial Respiration, refer to FM 21-11.

D Change 1

TM 11-6625-2735-14-1

SAFETY PRECAUTION

A periodic review of safety precautions in TB 385-4, Safety Precautions for Maintenance of

Electrical/Electronic Equipment, is recommended. When the equipment is operated with covers

removed, DO NOT TOUCH exposed connections or components. MAKE CERTAIN you are not

grounded when making connections or adjusting components inside the test instrument.

Change 1 E/(F blank)

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