Tektronix 1502 User manual

Addendum

the

1502

and

1503

Time

Domain

Reflectometer

Instruction

manuals.

TEKTROND©

WATERTIGHT

SEALING

PROCEDURES

for

1502/1503

TIME

DOMAIN

REFLECTOMETERS

INSTRUCTION

MANUAL

Tektronix,

Inc.

P.O.

Box

500

Beaverton,

Oregon

97077

070-2178-00

First

Printing

JULY

1976

WARRANTY

Tektronix

warrants

that

this

product

free

from

defects

materials

and

workmanship.

The

warranty

period

one

(1)

year

from

the

date

shipment.

Tektronix

will,

its

option,

repair

replace

the

product

Tektronix

determines

defective

within

the

warranty

period

and

if it

returned,

freight

prepaid,

service

center

designated

Tektronix.

Tektronix

not

obligated

furnish service

under

this

warranty:

torepair

damage

resulting

from

attempts

personnel

other

than

Tektronix

representatives

install,

repair,

service

the

product;

repair

damage

resulting

from

improper

use

from

connecting

the

product

incompatible

equipment;

personnel

other

than

Tektronix

representatives

modify

the

hardware

software.

There

implied

warranty

fitness

for

particular

purpose.

Tektronix

not

liable

for

consequential

damages.

1976

Tektronix,

Inc.

All

rights

reserved.

Contents

this

publication

may

not

reproduced

any

form

without

the

written

permission

Tektronix,

Inc.

Products

Tektronix,

Inc.

and

its

subsidiaries

are

covered

U.S.

and

foreign

patents

and/or

pending

patents.

TEKTRONIX,

TEK,

SCOPE-MOBILE,

and

Tort

are

reg-

istered

trademarks

Tektronix,

Inc.

TELEQUIPMENT

registered

trademark

Tektronix

U.K.

Limited.

Printed

U.S.A.

Specification

and

price

change

privileges

are

reserved.

REV

JUN

1980

TABLE

CONTENTS

LIST

ILLUSTRATIONS

PURPOSE

MATERIALS

SPECIAL

TOOLS

ASSEMBLY

PROCEDURES

Step

Preparation

subpanel

for

further

assembly.

Step

Install

the

holder

for

the

Battery

Level

Indicator.

Step

Install

the

seal

for

the

Power

Switch.

Step

Install

washers

for

the

Fuseholders.

Step

Install

the

Pushbutton

seals

the

Subpanel.

Step

Installation

rubber

seals

Subpanel

grooves.

Step

Installation

Implosion

shield.

Step

Preparation

Frontpanel.

Step

Bonding

Plug-in

Compartment

seal.

Step

10.

Bonding

washer

BNC

type

connector.

Step

11.

Install

pushbuttons

and

their

shaft

assemblies.

Step

12.

Attach

Subpanel

the

three

Frame

Sections.

Step

13.

Install

Frontpanel

Subpanel.

Step

14.

Install

Fuseholders

Frontpanel.

Step

15.

Install

Fusehoider

Caps.

Step

16.

Install

Battery

Meter.

Step

17.

Install

FOCUS

and

INTENSITY

controls.

Step

18.

Install

FINE

POSITION

control.

Step

19.

Install!

DISTANCE

METER.

Step

20.

Install

ZERO

REFERENCE

control.

Step

21.

Install

the

Record

control.

Step

22.

Install

the

GAIN

(1502),

O-dB

SET

(1503).

Step

23.

Partial

installation,

Main

Circuit

Board.

Step

24.

Install

cam

switch

inserts.

Step

25.

Finish

installation,

Main

Circuit

Board.

Step

26.

Install

Power

Switch

Shaft.

Step

27.

Install

POSITION

and

FINE

POSITION

knobs.

Step

28.

Install

ZERO

REFERENCE

knob

and

CHECK

pushbutton.

Step

29.

Install

FOCUS

and

INTENSITY

knobs.

Step

30.

Seal

Battery

Pack.

Step

31.

Frontpanel

jacks

X-Y

Module.

Step

32.

Thumbscrews

for

X-Y

Module.

Step

33.

Latch

assemblies

for

Front

Cover.

1502/1503

SEALING

Page

OOnN

aAnAaanAhAa

1502/1503

SEALING

Figure

10.

Figure

11.

Figure

12.

Figure

13.

Figure

14.

Figure

15.

Figure

16.

Figure

17.

Figure

18.

Figure

19.

Figure

20.

Figure

21.

Figure

22.

Figure

23.

Figure

24,

Figure

25.

Figure

26.

Figure

27.

Figure

28.

Figure

29,

Figure

30.

Figure

31,

Figure

32.

Figure

33.

Figure

34.

Figure

35.

ONOaAh

LIST

ILLUSTRATIONS

Subpanel,

identification

parts

for

Steps

through

Rubber

seals,

edge

sealing

for

Subpanel.

Detail

implosion

shield

sealing.

Front

Panel,

identification

parts

for

assembly

Steps

through

26.

Detail

Plug-In

Compartment

seal.

Detail

BNC

Connector

and

Washer.

Detail

Pushbuttons

and

their

Shafts.

Detail

Subpanel

and

screw-hole

sealing.

Detail

Fusehoider

installation.

Detail

Fushoolder

Caps.

Application

sealant

Battery

Meter.

Alignment

Battery

Meter.

Application

sealant

FOCUS

and

INTENSITY

controls.

Application

sealant

FINE

control

bushing.

Application

sealant

FINE

control

nut.

Installation

Distance

Meter.

Application

sealant

ZERO

REFERENCE

control

bushing.

Application

sealant

ZERO

REFERENCE

control

nut.

Application

sealant

CAMERA/RECORD

toggle-switch

bushing.

Application

sealant

CAMERA/RECORD

toggle-switch

nut.

Installation

rubber

Cap-Seal

CAMERA/RECORD

toggle-switch.

Application

sealant

the

GAIN

the

0-dB

SET

control

bushing.

Detail

showing

lubrication

and

sealing

for

the

variable

resistor.

Lubrication

the

O-rings

and

sealing

for

the

Cam

Switches.

Installation

the

POWER

SWITCH.

Lubrication

POSITION

control

knob.

Installation

knob

shaft.

Lubrication

ZERO

REFERENCE

knob.

installation

knob

ZERO

REFERENCE

control.

Lubrication

FOCUS

and

INTENSITY

control

knobs.

Sealing

Battery

Pack

screwholes.

Application

dielectric

type

compound.

Detail

front

panel

jacks.

Detail

X-Y

Module

thumbscrews.

Sealing

Latch

Assembly

screw-holes.

1502/1503

SEALING

PURPOSE

This

addendum

includes

only

those

assembly

procedures

that

are

concerned

with

making

1502

1503

watertight

instrument.

MATERIALS

Tektronix

Part

No.

Description

Notes

006-2302-00

Dow

Corning

No.

3144

This

Room

Temperature

Vulcan-

Adhesive

Sealant

izing

agent

(RTV)

used

form

watertight

gaskets.

(After

appli-

006-1171-00

Dow

Corning

No.

3145

cation,

allow

hours

curing

Adhesive

Sealant

time.)

252-0199-00

Dow

Corning

No.

3140

This

RTV

agent

used

where

the

Coating

application

requires

sealant

fluid

than

the

No.

3144

seal-

ant.

(Allow

hour

curing

time.)

006-0315-00

Dow

Corning

No.

This

compound

used

the

Silicone

Dielectric

Battery

Pack

assembly.

Compound

006-2475-00

Dow

Corning

No.

1204

Used

primer

for

No.

3144

Primer

sealant

applications.

006-2207-00

General

Electric

Used

waterproof

lubricant.

No.

G-661

Silicone

grease

006-0500-00

Acetone

Cleaning

Agent.

006-0034-00

lsopropy!

Alcohol

Cleaning

Agent.

REV

JUN

1980

1502/1503

SEALING

ASSEMBLY

PROCEDURES

NOTE

the

following

assembly

steps,

the

part

being

discussed

identified

its

Tektronix

Part

Number

(TPN)

and

its

location

the

Mechanical

Parts

List

(MPL)

the

Instruction

Manuals

for

the

1502

and

1503.

Example,

Step

the

Front

Subpanel

being

discussed.

the

1502

manual,

the

part

identified

TPN

426-1187-01

and

listed

the

MPL

under

Fig.

Index

No.

3-26,

the

1503

manual,

the

part

identified

TPN

426-1187-02

and

listed

the

MPL

under

Fig.

Index

No.

3-26.

MOUNTING

SCREW

IMPLOSION

SHIELD

POWER

SWITCH

SEAL

BATTERY

METER

HOLDER

OSC)

MAIN

SEAL

FRONT

DISTANCE

METER

PUSHBUTTON

SEAL

PUSHBUTTON

SHAFT

FUSEHOLDER,

WASHER

Figure

Subpanel,

identification

parts

for

steps

through

STEP

1502/1503

SEALING

Preparation

the

Subpanel

for

further

assembly

(see

Figure

SUBPANEL,

FRONT

(1)

1502

TPN

426-1187-01,

MPL

Item

3-26.

(2)

1503

TPN

426-1187-02,

MPL

Item

3-26.

Procedure.

(1)

Clean

entire

Subpanel

with

isopropyl

alcohol.

install

the

Holder

for

the

Battery

Level

Indicator

the

Subpanel

HOLDER

(1)

1502

TPN

352-0243-00,

MPL

Item

2-54.

(2)

1503

TPN

352-0243-00,

MPL

Item

2-57.

Procedure.

(1)

Insert

the

holder

into

the

Subpanel.

(2)

This

item

does

not

require

the

application

sealing

compound

Install

the

seal

for

the

Power

Switch

the

Subpanel

SEAL,

SWITCH

(1)

1502

TPN

348-0422-00,

MPL

Item

2-52.

(2)

1503

TPN

348-0422-00,

MPL

Item

2-55.

Procedure.

(1)

Clean

mating

surface

seal

with

acetone.

(2)

Coat

mating

surface

seal

with

No.

3144

sealant.

(3)

Install

seal

Subpanel.

install

washers

for

the

Fuseholders

the

Subpanel

WASHER,

FLAT

ea.)

(1)

1502

TPN

210-1246-00,

MPL

Item

2-49.

(2)

1503

TPN

210-1246-00,

MPL

Item

2-51.

Procedure.

(1)

Clean

the

washers

with

acetone.

(2)

Coat

the

mating

surfaces

the

washers

with

No.

3144

sealant.

(3)

Insert

the

washers

the

Subpanel.

install

the

Pushbutton

seals

the

Subpanel.

SEAL,

PUSHBUTTON

(1)

1502

TPN

348-0409-01,

MPL

Item

2-51,

and

TPN

348-0409-03,

MPL

Item

2-50.

(2)

1503

TPN

348-0409-01,

MPL

Item

2-53,

TPN

348-0409-02,

MPL

Item

2-54,

and

TPN

348-0409-04,

MPL

Item

2-52.

Procedure.

(1)

Clean

mating

surfaces

seals

with

acetone.

(2)

Coat

mating

surfaces

with

No.

3144

Sealant.

(3)

Install

seals

subpanel.

1502/1503

SEALING

G-661

LUBRICANT

FRONT

SIDE

RUBBER

Seal

(FRONT)

Coe

OUTSIDE

EDGE

wet

ses

sear

-,"

weds

BGs

Syl

cee

NO.

3140

_-~

Reta

SEALANT

“

Pty

RUBBER

Seal

(REAR)

G-661

LUBRICANT

REAR

SIDE

Figure

Rubber

Seals,

edge

sealing

for

subpanel.

STEP

Installation

rubber

seals

two

grooves

located

the

outer

(see

Figures

and

edges

the

front

and

rear

sides

the

Subpanel.

SEAL,

RUBBER

ea.)

(1)

1502

TPN

348-0477-00,

MPL

!tem

2-55.

(2)

1503

TPN

348-0477-00,

MPL

Item

2-58.

Procedure.

(1)

Clean

the

rubber

seais

with

acetone.

(2)

Apply

film

No.

3140

sealant

the

inner

surface

each

groove

See

Figure

not

apply

the

sealant

the

other

surfaces

the

grooves.

No.

3140

fluid

than

No.

3144

and

can

applied

with

hypodermic

type

applicator.

(3)

Place

seal

each

groove.

Trim

each

seal

length

such

that

its

ends

butt

together.

Apply

film

No.

3140

sealant

the

Butt

joint.

(4)

Before

installing

the

instrument

cabinet,

lubricate

the

outer

edges

the

seals

shown

Figure

REV

JUN

1980

1502/1503

SEALING

NO.

3144

SEALANT

RETAINER

REMOVE

EXCESS

SEALANT

SHIELD

SUBPANEL

Figure

Detail

implosion

shield

sealing.

STEP

Install

the

implosion

shield

and

its

retainer

the

Subpanel

(see

Figures

and

SHIELD,

IMPLOSION

(1)

1502

TPN

337-2206-00,

MPL

Item

2-94.

(2)

1503

TPN

337-2206-00,

MPL

Item

2-91.

RETAINER

(1)

1502

TPN

343-0610-00,

MPL

Item

2-93.

(2)

1503

TPN

343-0610-00,

MPL

Item

2-90.

Procedure.

(1)

Clean

the

retainer

and

the

implosion

shield

mounting

area

the

Subpanel

with

acetone.

(2)

Remove

the

protective

paper

from

the

implosion

shield.

(3)

Position

the

shield

the

Subpanel

and

form

continuous

bead

No.

3144

sealant,

approximately

.090

inch

diameter,

around

the

shield/Subpanel

interface.

(4)

Position

the

retainer

over

the

bead

sealant

and

press

into

place.

NOTE

(1)

Pressing

the

retainer

should

cause

some

the

sealant

appear

outside

the

retainer

area,

see

Figure

Failure

the

sealant

appear

any

point

around

the

retainer

indication

inadequate

sealing.

(2)

When

performing

this

step,

assure

that

the

shield

makes

flush

contact

with

the

subpanel,

see

Figure

(5)

After

curing

time

approximately

hours,

use

small

wooden

dowel,

such

Q-tip

handle,

and

remove

the

excess

sealant

that

visible

between

the

shield

and

retainer.

1502/1503

SEALING

BATTERY

METER

PLUG-IN

SEAL

POWER

SWITCH

SHAFT

POWER

anne

DISTANCE

VARIABLE

RESISTOR

FRONT

PANEL

INSTI:

mp/DIV

wurt/er

200

CABLE

vocus

rramatry

“

mm,

CAUTION

abet

SECORD

ats

“¢

1502

CABLE

BNC

CONNECTOR

CAM

SWITCH

SHAFT

INSERT

VARIABLE

RESISTOR

VARIABLE

RESISTOR

TOGGLE

SWITCH

FUSEHOLDER

Figure

Front

Panel,

identification

parts

for

assembly

steps

through

26.

STEP

Preparation

Front

Panel

for

assembly

(see

Figure

FRONT

PANEL

(1)

1502

TPN

333-1991-00,

MPL

Item

2-47.

(2)

1503

TPN

333-2003-00,

MPL

Item

2-49.

(3)

1503

Option

TPN

333-2123-00,

MPL

Item

2-49.

Procedure.

(1)

Clean

mating

surface

front

panel

with

acetone.

(2)

Coat

mating

surface

panel

with

No.

1204

primer.

Allow

hour

curing

time.

PANEL

SEAL

NO.

3144

G-661

SEALANT

LUBRICANT

Figure.

Detail

Plug-in

Compartment

seal.

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