Tektronix SC 501 Instruction Manual

INSTRUCTION

MANUAL

Tektronix,

Inc.

P.O.

Box 500

Beaverton, Oregon 97005

Serial Number

070-1700-00

First Printing APR 1974

sc

501

TABLE

OF

CONTENTS

Page

SECTION 1

OPERATING INSTRUCTIONS

Introduction

Description

1-1

Installation and Removal

1-1

Controls

& Connectors

1-2

Operating Considerations

1-3

Deflection Factors

1-3

Applying Signals

1-3

Input

Coupling

1-3

Sweep

Triggering

1-3

Rear Interface

1-4

Table

1-1

Rear Connector Pin Assignments

1-4

Input

Assignments

1-4

Output Assignments

1-5

Electrical Characteristics

1-5

Table

1-2

Vertical Deflection

System

1-5

Table

1-3

Horizontal Deflection System

1-6

Table

1-4

Triggering

1-6

Table

1-5

Display

1-7

Table

1-6

Environmental

1-7

SECTION

2 SERVICING

INFORMATION

Introduction

2-1

Contents

2-1

Maintenance

2-1

Cathode-Ray Tube

Replacement

2-1

Test Equipment Required

2-2

Diagrams and Parts Lists

2-3

Electrical Parts List

2-4

Calibration

Adjustments

Component Locations (reverse side of foldout)

Block Diagram

Input &

Vertical

Amplifier

(Circuit Description)

Sweep

&

Horizontal Amplifier (Circuit Description)

Z-Axis & CRT Circuit (Circuit Description)

Low Voltage Supplies

(Circuit Description)

Mechanical

Parts List

Fig. 1 Exploded

View

Fig. 2 Accessories &

Repackaging

CHANGE

INFORMATION

sc

501

Section 1—SC 501

OPERATING

INSTRUCTIONS

INTRODUCTION

DESCRIPTION

The SC

501

general

purpose oscilloscop)e is

designed

to

operate

in

a

TM 500

Series Power

Module. The

SC

501 has

a

bandwidth of

at

least

5

MHz

and

a

calibrated

vertical

deflection range

from

10 mV/DIV

to

1 V/DIV,

selectable

in

decade steps.

An uncalibrated

VARIABLE control

extends

this

range

to at

least 10

volts/division.

Calibrated sweep

rates are selected by

pushbutton-

controlled

logic in decade steps

from

1

ms/DIV

to

lOOms/DIV

(millisecond

range)

and

in decade steps

from

1

ms/DIV

to 100 ms/DIV

(microsecond

range). A

VARIABLE

control

extends

the

slowest calibrated sweep

rate

to

at

least 1

second/division and

a

X5

Magnifier

extends

the fastest

calibrated

sweep

rate

to

at

least

200

nanoseconds/division.

The

triggering circuits

allow stable

triggering from either

internal or external sources. An AUTO

triggering mode and

manual LEVEL/SLOPE

selection

is

combined in

a

single

control. With no

input signal,

automatic

triggering provides

a

bright baseline

at

all

sweep rates.

An internal switch

converts the

horizontal deflection

system

of the

SC

501 to

an External Horizontal

Amplifier

mode

of operation.

INSTALLATION AND

REMOVAL

The

SC

501

is calibrated and ready

for use as

received.

Referring to

Fig. 1-1,

install the

SC

501

and turn on

the

Power

Module. Check

that the POWER

indicator on

the

SC

501 front panel comes

on.

NOTE

It

is

recommended

that the

Power Module be

turned

off before

inserting or removing

the

SC

501. Arcing

at

the

rear connector terminals

can reduce

connector

life. However,

no internal

damage will

result

if

the

SC

501 is

inserted in

a

live Power

Module.

Refer

to

CONTROLS &

CONNECTORS

(Fig.

1-2)

for

description

of front panel

controls, connectors

and

indicators.

©

1-1

Operating

Instructions—

SC 501

CONTROLS &

CONNECTORS

NOTE

Switch

for

Y-T

or

X-Y

operation located inter-

nally; right

side,

lower cen-

ter of instrument.

Vertical

Input Connector.

BNC connector for

vertical

amplifier signal

input.

VARIABLE

Control

Extends

each

calibrated

vertical

deflection factors

over

a 10:1

range. Maxi-

mum

at

least

10 V/Dhr.

Trigger Controls.

LEVEUSLOPE

selection

from

INT or EXT

sources.

Pull

LEVEL/SLOPE

con-

trol

out

for

AUTO

trig-

gering mode.

Sweep

VARIABLE

and

X5

Mag.

Variable controls

extends

each calibrated

sweep

rate

over

a

10:1 range.

Slowest

sweep rata

1

sac/Oiv.

Pull

variable

out

for

X5

magni-

fication of each

calibrated

sweep

rata. Fastest

cali-

brate

sweep rate

at least

200

ns/Div.

SC 501

OSCILLOSCOPE

p

—

;

—

!

I

i

t

1

1

i

!

"-ImTUISI

Jl

TY

EXT

HORIZ

pin

jack.

Operates

in

conjunction

with

internal

swit^ to

al-

low

X-Y

operation.

Range

EXT TRIG

pin

jack.

Allows

sweep

triggering

from

external

sources.

Tima/Div

button.

A

push-push switch

to

al-

low

selection of a

milli-

second or

microsecond

range

for the

calibrated

Time/Oiv settings.

FOCUS

Control

Provides

adjustment to

obtain

a

well-defined

dis-

play.

INTENSITY

Control.

Controls

display

brightness.

POSITION Control.

Positions

display vertically.

Volts/Div

Pushbuttons.

Two

self-canceling switches

select the

calibrated deflec-

tion factors as

indicated.

T o

return

to

the

10 mV/Oiv

setting, depress

the unused

pushbutton

just

enough

to

release the other

pushbutton.

POSITION

Control.

Positions

display

horizon-

tally.

Time/Div Pushbuttons.

Two

self-canceling

switches

select the calibrated

sweep

rates as

indicated.

Ground Connector.

Chassis

return connector

for signals.

Fig.

1-2.

CONTROLS

&

CONNECTORS.

Operating

Instructions—SC 501

OPERATING

CONSIDERATIONS

DEFLECTION FACTORS

The

amount of

vertical

deflection

produced

by

a

signal is

determined

by the signal amplitude,

the attenuation factor

(if

any)

of the probe, the setting of the

Volts/Div

pushbuttons,

and

the setting

of

the associated

VARIABLE

control.

Use

the

largest deflection factor

.(1

V/DIV)

when first

connecting

the

SC

501 to an

unknown voltage source.

If

the

deflection is too

small

to

make the measurement,

switch

to a

lower

deflection factor.

The

deflection factors

indicated

by the

Volts/Div push-

buttons

are calibrated

only when the

VARIABLE

control is

rotated

fully clockwise.

The range

of the VARIABLE

control is

at

least 10:1.

It

provides

uncalibrated

deflection factors covering the full

range

between

the fixed settings of Volts/Div pushbuttons.

The

VARIABLE

control extends the maximum deflection

factor to at

least 1

0

volts/division.

APPLYING SIGNALS

While most

connections

to

the

SC

501

will probably be

made

using coaxial

cables, probes offer

another convenient

method

of

applying a'

signal

to

the input of the

SC

501.

Tektronix

probes are

shielded

to

prevent

pickup

of

electro-

static

interference.

A 10X

attenuator

probe offers a

high

input

impredance and

allows the circuit under test to

perform

very close to

normal operating conditions. The

SC

501

is

compatible with probes

such as Tektronix P6006

and

P6028

Passive

Probes. When probe

attenuation is not

desired,

a

Tektronix P6011

Passive Probe

is recommended.

NOTE

Probe

compensation should be

checked with a

known

signal

(risetime of 700

nanoseconds or

less) before

using

the

SC

501.

Input

time constant is

normalized

for

each

attenuator step.

Unshielded test leads

can sometimes

be used to

connect

a

signal

source

to

the

SC

501,

particularly

when

a

high-level,

low-frequency signal is monitored at a

low

impedance

point. However, when any

of these

factors are missing, it

becomes

increasingly important to use

shielded cables. In

all cases, the signal

transporting leads should

be kept as

short

as

practical.

Be

certain that

a

common ground

connection is established

between the device under test

and

the

SC

501

.

The shield of a

coaxial cable or ground strap of

a

signal

probe

provides

an adequate

common

ground

connection.

INPUT COUPLING

The

AC COUPL

pushbutton switch allows

a

choice of

input coupling. The type of

display desired

determines the

method of coupling used.

Dc

coupling

(button out)

can be used for most

applica-

tions. However,

if

the dc compronent of

the applied

signal

is

much larger than the

ac

component, ac

coupling (button in)

will probably provide

a

better display.

Dc

coupling

should

be used to

display an

ac

signal below

ebout 3

hertz.

In

the

ac

coupling position, the dc

component

is blocked

by a

series capacitor

in the input circuit. The

low-frequency

response in the

ac

position is about

3 hertz

(—3

dB

point);

therefore, some

low-frequency attenuation

and

phase shift

can

be

expected

near this

frequency limit. Distortion

will

also appear

in square waves that

have

low-frequency

components.

SWEEP TRIGGERING

When the source

switch isinthe I NT

position,

the

sweep

is triggered by a

sample of the

signal applied to

the VERT

INPUT connector.

The display

is stable

for either Normal

or AUTO

triggering modes

as

long as

the signal frequency

is

above 10 Hz. Below

10 Hz, it may be

desirable

to

use

Normal mode

triggering (LEVEL/SLOPE

control

pushed

in). The

AUTO

triggering mode

(LEVEL/SLOPE

control

pulled

out)

reduces operator

adjustments

and provides a

bright

baseline in the absence

of an input

signal.

When

the

source

switch

is

in the

EXT

position,

the

sweep is

triggered

by

the

signal

applied

to

the

EXT

TRIG

pin jack.

The

signal applied

to

the

EXT

TRIG pin jack must

be

time-related

to

the signal appliedtothe

VERT

INPUT

connector in order

to

prevent drift in the display.

Operating

Instructions—SC

501

REAR INTERFACE

TABLE

1-1

REAR

CONNECTOR

PIN

ASSIGNMENTS

(REAR

VIEW)

Pin No.

Left (B)

Right

(A)

28 Unassigned

Unassigned

27

*

-t-

Gate

Out

‘EXT TRIG signal

26 Unassigned

‘

EXT TRIG common

23-25

Unassigned

Unassigned

22

Unassigned

Unassigned

18-21

Unassigned

Unassigned

17

‘VERT INPUT

signal

‘

EXT HORIZ common

16

‘VERT INPUT common

‘EXT

HORIZ signal

14

Unassigned

Unassigned

15 Unassigned

Ramp Out

13

Not used

Not used

12 +33.5

V

Filtered

dc

+33.5

V Filtered dc

11

Collector PNP Series-Pass

Transistor

Base

PNP

Series-Pass Transistor

10

Not used

Emitter

PNP

Series-Pass Transistor

9 ±33.5

Vdc common

±33.5

Vdc common

8 —33.5

V

Filtered

dc

—33.5

V Filtered

dc

7

Collector NPN

Series-Pass

Transistor

Emitter NPN Series-Pass Transistor

-6

No Connection

Base

NPN Series-Pass Transistor

1-5

Not used

Not used

*

Instrument not supplied

with these connections.

See INPUT

and OUTPUT

ASSIGNMENT.

NOTE

Refer

to

Power

Module instruction

manual for

information concerning pins labeled

Not

used.

INPUT ASSIGNMENTS

The VERT INPUT signal,

EXT TRIG signal

and

EXT

HORIZ signal

can be applied

through

the rear

interface

connectors if

the

SC 501 is modified

as

follows:

A. VERT INPUT signal.

1. Unsolder the 200 ohm resistor

attached

to

the

VERT

INPUT connector.

Connect tl\e center conductor

of a coaxial cable

to

the 200 ohm

resistor. Connect the

coaxial cable shield

to ground.

2. Connect the other end

of the coaxial cable: center

conductor

to

pin

17B

and

shield

to

pin

16B

(common).

NOTE

Parallel operation

may

be

obtained if

another

200 ohm

resistor

is

connected in series

with

the

center conductor of

a

coaxial cable to the

junction

of

R100 and the main circuit board. The

addition

of

any

coaxial cable

to

input circuits affects

the input

impedance.

B. EXT TRIG

signal.

1 .

Connect the center conductor of

a

coaxial

cable

to

the EXT TRIG pin jack. Ground the

coaxial

cable

shield.

2.

Connect the other end of the

coaxial

cable:

center

conductor to pin 27A

and

shield

to

pin 26A

(common).

1-4

REV. B,

AUG.

1974

Operating

Instructions—

SC 501

3. Set

the trigger

source switch to

the

EXT

position

to

trigger

the

sweep from

pin

27A.

C. EXT

HORIZ signal.

1 .

Connect

the center conductor of a

coaxial cable

to

the

EXT

HORIZ pin jack.

Ground the coaxial

cable

shield.

2. Connect

the other end of the

coaxial cable: center

conductor to pin 16A

and

shield

to

pin

17A (common).

OUTPUT

ASSIGNMENTS

A

+

Gate Out

signal can

be routed to

the rear

interface

connector via

the

center conductor

of

a

coaxial

cable to

pin

27B.

Shield ground may be any

convenient

location. A

Ramp Out Signal is

factory

wired to

pin

15A

.

Other

pins

(unassigned)

are

available

at

the rear

interface

connector

for

routing signals to

and from the

SC

501 for

specialized

applications. One or more

compartments

of

a

multi-plug-in

Power Module can

be wired

with

barriers installed to

provide specific

functions

between

compartments.

See

Power Module

instruction

manual

for

additional

information.

ELECTRICAL

CHARACTERISTICS

PERFORMANCE

CONDITIONS

The

electrical

characteristics

are valid

only if the SC 501

has

been

calibrated at an

ambient

temperature

between

-h

20°C

and

-t-30°C

and is

operating at

an

ambient

temperature

between

0°C

and

-h

50°C

unless

otherwise

noted.

TABLE

1-2

VERTICAL DEFLECTION

SYSTEM

CHARACTERISTICS

Characteristics

Performance

Requirements

Supplemental

Information

Bandwidth

Dc to

at

least 5 MHz.

Deflection

Factors

10

mV/div,

100

mV/div, and 1 V/div.

Accuracy

Within 3%

of indicated deflection.

VARIABLE in XI

(fully cw)

position:

gain

correctly

set at 10

mV/div.

Uncalibrated

(Variable)

Range

Continuously variable

between steps.

Extends

deflection factor

to a

maximum

of 10

V/div.

10:1 range

for

all attenuator settings.

Low

Frequency

Linearity

0.1

division or

less

compression or

expansion of

a

two

division (at

center

screen)

signal when p>ositioned to

the

top

and bottom of

the graticule area.

Input

Coupling

Ac or dc.

Lower

bandwidth

limit when

ac-coupled

is approximately

3 Hz.

Input

Impedance

1 MJ7

paralleled by 47

pF.

Input time constant

is

normalized for

each attenuator step.

Maximum

Safe Input Voltage

350 V (dc +

peak ac).

REV.

B, AUG.

1974

1-5

operating

Instructions—SC

501

TABLE

1-3

HORIZONTAL

DEFLECTION

SYSTEM

CHARACTERISTICS

Characteristics Performance

Requirements

Supplemental

Information

Time

Base

Calibrated Sweep Rates

1 ms/div,

10

ms/div, 100 ms/div,

1

ps/div,

10

ps/div, 100

/is/div.

Uncalibrated

(Variable) Range

Extends slowest

calibrated rate to at

least

1 sec/div.

10:1

range for all

calibrated

rates.

Zero to

10 V ramp

output

available at

rear

interface

connector for

all sweep

rates

(excluding

X5

magnification).

X5

Magnifier (fixed)

Extends

fastest

calibrated sweep rate to

at

least 200

ns/div.

Accuracy (Over

8

div)

Within 5%

for all

sweep

rates.

Disregard

first

0.5

ps

of total sweep

length.

Linearity (any two

division

fxartion

within center

eight divisions)

Within 5%.

Disregard

first

0.5

/is of total sweep

length.

External Horizontal

Amplifier

Internal

switch

must

be

set

to

X-Y

position.

Bandwidth

Dcto

100 kHz.

Internally

calibrated

for

100 mV/div.

Input lmF>edance

Approximately 100

kJ2

paralleled by

25

pF.

Maximum

Input Voltage

±3

V.

TABLE

1-4

TRIGGERING

CHARACTERISTICS

Characteristics

Performance

Requirements

Supplemental

Information

Normal Trigger

Sensitivity (Trigger

LEVEL/SLOPE control

pushed in)

Internal: Dc-coupled

0.4 major

division of

deflection at dc

increasing to 1.0

major

division of

deflection at

5

MHz.

External: Dc-coupled

1 V

minimum

to 5

V

maximum

from dc

to 5 MHz.

Input

Impedance

22 Kfi

paralleled by

approximately

150

pF.

AUTO

triggering

(Trigger LEVEL/

SLOPE

control

pulled to out

position)

Sweep

free-runs in

absence of

trigger

signal or for

trigger repetition

rates

below

10 Hz.

Operating

Instructions—

SC

501

TABLE

1-5

DISPLAY

CHARACTERISTICS

Characteristics

Performance Requirements

Supplemental

Information

Graticule

Type Internal black line, nonilluminated.

Area

Six divisions vertical

by 10

divisions

horizontal.

Each division

equals

0.203 inch.

Phosphor P31

standard.

TABLE

1-6

ENVIRONMENTAL

CHARACTERISTICS

Characteristics

Performance

Requirements Supplemental

Information

Temperature

Operating

0°C to

-t50°C.

Storage

-40°C to +75‘’C.

Altitude

Operating To

15,000

feet.

Storage To 50,000

feet.

Vibration

Operating

and Non-operating

With the instrument complete

and

operating, vibration frequency swept

from 10

to

50 to

10 Hz

at

1 minute per

sweep. Vibrate 15 minutes in each

of

the

three major axes at 0.015 inch total

displacement.

Hold 3 minutes at

any

major

resonance,

or

in

none,

at

50 Hz.

Tot^l time,

54 minutes.

Shock

Operating and Non-operating

30

g's, 1/2

sine,

1 1 ms duration, 2 shocks

in

each direction along

3 major

axes, for

a

total of

12

shocks.

1-7

Section

2—SC 501

SERVICING

INFORMATION

INTRODUCTION

CONTENTS

This

section of

the manual

contains

information neces-

sary to

service

the

SC

501

A

block

diagram

and

schematic

drawings are

provided as

an

aid

in

understanding the

theory

of

operation

of the

SC

501.

A circuit

description

for each

schematic

drawing

is

included on

the

associated

foldout page.

Adjustment and

calibration

procedures are

provided on

a

foldout

page

with supporting

illustrations that

show inter-

nal adjustment

locations and

measurement

check points.

Also included is

the

electrical parts list and a

component

location

grid

to

facilitate the location

of the components

on

the etched

circuit boards.

Mechanical

parts are

listed

in the

rear of

this

section

with an

exploded

view of

the

instrument. A

list of

standard

accessories and

a

carton assembly

drawing are

on

the back

of

the

exploded view foldout

page.

MAINTENANCE

General system

maintenance

procedures are

provided in

the Power Module instruction

manal,

i.e.,

preventive main-

tenance, troubleshooting aids, parts

removal

and

replace-

ment procedures, parts ordering information, etc.

Adjustment

of

the

SC

501 may be required after

a

repair

has been made, or after long time

intervals

in

which normal

aging of components may

affect instrument accuracy.

Before

complete calibration, thoroughly

clean and in-

sfject

this

instrument as

outlined in the service section of

the Power

Module

instruction manual.

Refer to

Fig.

2-1

as

an aid

in removing

or

replacing the

cathode-ray tube.

CRT

base

socket

NOTE

It

is

not necessary

to

remove the

crt shield

or

front

panel.

CRT shield

Use

care

when handling a

crt.

Protective

clothing and

safety

glasses

should

be

worn. Avoid

striking it

on

any object

whidi

might cause it to

crack or

implode.

When storing a crt,

place

it in a

protective car-

ton or set

it face down in a

protected

location on

a

smooth

surface with a soft mat under the

faceplate

to

protect it from

scratches.

Fig.

2-1. Replacing

the cathode-ray tube.

Replacing

the

crt

will require

partial

instrument readjostments. Refer

to

CALIBRATION

ADJUST-

MENTS

foldout

page.

2-1

Servicing

Information—SC 501

TEST

EQUIPMENT REQUIRED

The

following test equipment and accessories,

or its

equivalent, is

required

for

complete

calibration

of

the

SC

501.

Specifications

given

for

the test

equipment

are

the

minimum

necessary

for accurate

calibration

or

measure-

ment. All test

equipment

is assumed

to

be correctly

calibrated

and operating

with specifications.

If other

test

equipment

is substituted, control settings or

calibration setup may

need

to

be altered to meet

the

requirements of

the

equipment

used.

Detailed

operating

instructions

for the test

equipment used

are not given in

the

adjustment

or

calibration procedures.

Refer

to

the

instruc-

tion manual

for the test

equipment if more

information is

desired.

1. TM 500

Series Power

Module

2.

Plug-in

Extender.

Tektronix Part

No.

067-0645-01.

3.

Variable

Autotransformer.

Must be

capable of

supplying

sufficient wattage

over

a

range of

90

to

132 V or

180 to

264 V.

Autotransformer

must have an ac

voltmeter

to

indicate

output

voltage.

4. Dc

Voltmeter:

accuracy

within 0.1% and a

measure-

ment

range from

—1000

V to

-t-100

V.

For example,

a

DM

501

Digital

Multimeter, or any

high impjedance

dc

voltmeter

meeting the above

requirements.

5.

Amplitude

Calibrator:

accuracy

within 0.25%. Out-

put

amplitudes

from

50

mV

to

10 V.

Square-wave

repeti-

tion rate about

1 kHz. For example, Tektronix

Calibration

Generator

PG

506 or

Calibration Fixture

067-0502-01.

6. Test

Oscilloscop>e. Minimum bandpass

of

1

MHz

and

deflection

factor

of at

least 10 mV/div

with

a 10X

probe.

For

example, Tektronix 5103/D10

oscilloscope

with

5B10N

Time

Base/Amplifier,

5A23N

Amplifier

plug-in

and

a

P6006 probe, or any

oscilloscope that meets the

above

requirements.

7.

Leveled Sine-Wave

Generator.

Tektronix

SG 503 or

191

Constant-Amplitude

Signal Generator.

8.

Time-Mark

Generator.

Tektronix

TG 501

or

2901.

9.

Input

Ndrmalizer

47

pF (BNC).

Tektronix Calibra-

tion Fixture

067-0541-00.

10. 50-ohm termination with BNC connectors.

Tektronix Part No. 01

1-0049-01.

11.

Coaxial cables. Impedance

50 ohms, RG 58/U,

maximum length

42 inches,

BNC

connectors.

Tektronix

Part No.

012-0057-01.

12. Adapter, BNC

to

pin

jack. Tektronix

Part

No.

1

75-1

1 78-00, or

equivalent.

13.

Screwdriver, three-inch

shaft, 3/32

bit. Xcelite

R-3323.

14.

Low-capacitance

screwdriver, one and

one-half inch

shaft.

Tektronix Part No.

003-0000-00.

Servicing

Information—

SC

501

DIAGRAMS

AND PARTS

LISTS

SYMBOLS

AND

REFERENCE

DESIGNATORS

Electrical

components

shown on the

diagrams are in

the following units

unless

noted otherwise:

Capacitors

=

Values one or

greater are

in picofarads (pF).

Values less

than one

are in microfarads

(pF).

Resistors

=

Ohms

Symbols

used

on

the

diagrams are based on

ANSI

Y32.2

—

1970.

Logic

symbology

is

based

on MIL-STD-806B

in

terms of positive logic. Logic

symbols

depict the logic function

performed

and

may

differ

from

the manufacturer's data.

The

following

special

symbols are used

on the

diagrams:

External Screwdriver adjustment.

External

control or connector.

Clockwise

control

rotation

in

direction of

arrow.

Refer

to

diagram

number indicated

in

diamond.

Refer

to

waveform

number indicated

in

hexagon.

Connection

soldered to

circuit board.

Connection made to

circuit

board

with interconnecting

pin.

Blue

tint

encloses

components

located on

circuit

board.

P/0

circuit

board

ELECTRICAL

REPLACEABLE

PARTS

LIST

PARTS ORDERING INFORMATION

Replacement parts are available from

or through your

local Tektronix,

Inc.

Field

Office or representative.

Char>ges

to Tektronix

instruments are

sometimes made

to accommodate

improved

components as they become available, and to give

you

the benefit

of the

latest

circuit

improvements developed in our engineering department.

It is

therefore

important,

when

ordering parts,

to

include the following

information

in your order:

Part number,

instrument type or number, serial number,

and modification

number if

applicable.

If

a f)art you

have

ordered

has been replaced with

a

new

or improved

part, your

local Tektronix, Inc.

Field

Office or representative will

contact

you concerning

any

chartge in

part

number.

Change information,

if

any, is located at

the

rear of this manual.

SPECIAL NOTES

AND SYMBOLS

XOOO Part first added

at

this serial number

OOX

Part removed after

this serial number

ITEM NAME

In the Parts List, an Item Name is

separated from

the description

by

a colon

(:).

Because

of

space limitations, an

Item Name may sometimes appear

as incomplete.

For

further Item Name

identification, the

U.S.

Federal

Cataloging Handbook

H6-1

can be

utilized

where

possible.

ABBREVIATIONS

ACTR ACTUATOR

PLSTC PLASTIC

ASSY ASSEMBLY QTZ

QUARTZ

CAP CAPACITOR, RECP

RECEPTACLE

CER CERAMIC

RES RESISTOR

CKT CIRCUIT

RF RADIO

FREQUENCY

COMP COMPOSITION

SEL SELECTED

CONN CONNECTOR SEMICOND

SEMICONDUCTOR

ELCTLT ELECTROLYTIC SENS

SENSITIVE

ELEC

ELECTRICAL SEP

SEPARATELY

FXD FIXED

VAR

VARIABLE

INC

AND

INCANDESCENT

WW

Wl

REWOUND

LED LIGHT

EMITTING DIODE

XFMR

TRANSFORMER

NONWIR

NON

Wl

REWOUND

XTAL

CRYSTAL

Electrical Parts

List—

SC 501

CROSS

INDEX MFR.

CODE

NUMBER TO

MANUFACTURER

MFR.CODE

MANUFACTURER

ADDRESS

CITV.STATE.ZIP

0085

SaztgaiBO Electric

Co.

,

S.

Carolina

Dlv.

F.

O.

Box

128

Pickens,

SC

29671

01002

General Electric

Co.

,

Industrial and

Pover Capacitor

Products Dept,

John

St.

Hudson

Falls, NY 12839

0X121

Allen-Bradley

Co. 1201

2nd

St.

South

Milwaukee,VL53204

02735 BCA Corp.

,

Solid State Division Route

202

Somerville,

NY

08876

03508

General

Electric

Co

.

Semi-Conductor

Products

Dept.

Electronics

Peu'k

Syracuse, NY

13201

04713

Motorola, Inc.

,

Soslconductor

products Dlv.

5005 E. McDowell Rd.

Phoenix,

AZ 85008

07263

Fsirchild

Semiconductor,

X

Dlv.

of

FEtlrchild Camera and Instrument

Corp. 464 Ellis St.

Mountain

View,CA94040

07910 Teledyne

Semiconductor 12515 chadron

Ave.

•

Hawthorne, CA 90250

10389 Chicago Switch

,

Inc

2035

Wabansia Ave.

Chicago, IL

60647

12040 National

Semiconductor Corp.

Ccsmnerce

Drive

Danbury,

CT

06810

14752 Electro Cube

Inc. 1710

S.

Del Mar Ave.

San

Gabriel,

CA

91776

22229 Solltron

Devices,

Inc.

8808

Balboa

Ave.

San Diego, CA

92123

24931

Specialty Connector

Co., Inc. 3560 Madison Ave.

Indianapolis,

IN

46227

27014

National Semi-Conductor Corp. 2900

San

Ysidro Way

Santa Clara,

CA 95051

34553-

Ai^rex Electronic

Corp.

,

Coo^nent Dlv. 35 BOfAllan Ave.

Bappauge, NY

11787

56289 Sprague Electric

co.

North Adams,

MA 01247

63743

Nsurd

Leonard

Electric

Co., Inc. 31

South St.

Mount Vernon, NY

10550

71590 Centralab Electronics, Dlv.

of

Globe-Union, Inc. 5757

N.

Green

Bay

Ave.

Milwaukee,

WI

53201

71744

Chicago Miniature

Laji^ Works

4433 Ravenswood Ave. Chicago, IL

60640

72136 Electro

Motive

Mfg.

Co.,

Inc., The

South Park and John Streets

Willimantic,

CT 06226

72982 Erie Technological Products, Inc. 644W.12th

St.

Erie, PA

16512

73138 Beckman

Instruments, Inc., Bellpot Dlv. 2500 Harbor Blvd. Fullerton,

CA

92634

74970

Johnson,

£.

F.

,

Co. 299 10th

Ave.

S.

W.

Waseca,

MN

56093

75042

TRW

Electronic Coe^xments,

IRC

Fixed

Resistors,

Philadel^la Division 401

N.

Broad

St.

Philadelphia,

PA

19108

80009 Tektronix, Inc.

P.

0. Box 500 Beaverton,

OR 97005

91637 Dale

Electronica, Inc.

P. 0. Box 609 Columbus,

NB 68601

Electrical

Parts

List—SC

501

Tektronix

Ckt No.

Port

No.

Serial/Model

No.

Eff

Dscont

Nome

&

Description

Mfr

Code

A1

670-3304-00

CKT

BOARD ASSY:MAIN

80009

A2

670-3364-00

CKT BOARD ASSY :

AMPLIFIER

80009

ClOO

283-0189-00

C102

281-0184-00

C104

281-0153-00

C105

281-0628-00

C107

283-0641-00

CAP.,FXD,CER

DI:0.lDF,20%,400V

72982

CAP.

,VAR,PLSTC:2-18PF,500VDC

34553

CAP.

, VAR,AIR

DI:1.7-10PF,

250V

74970

CAP.,rXD,CER

DI:15PF,5%,600V

72982

CAP.

,FXD,MICA

D:180PF,1%,100V

00853

Clio

281-0184-00

C112

281-0153-00

C113

281-0628-00

C115

283-0696-00

C117

281-0184-00

CAP.

,VAR,PLSTC:2-18PF,500VDC

34553

CAP.

,

VAR,AIR

DI:1.7-10PF,

250V

74970

CAP.,FXD,CER

DI:15PF,5%,600V

72982

CAP.

,FXD,MICA

D:2300PF,1%,500V

72136

CAP.

,VAR,PLSTC:2-18PF,500VDC

34553

C118

281-0576-00

C120

283-0003-00

C124

290-0525-00

C127

281-0518-00

C138

283-0003-00

CAP.,FXD,CER

D1:11PF,5%,S00V

72982

CAP.,FXD,CER

DI:0.01UF,

+80-20%, 150V

72982

CAP.

,FXD,ELCTLT:4.7tJF,20%,50V

56289

CAP.,FXD,CER

DI:47PF,+/-9.4PF,500V

72982

CAP.,FXD,CER

DI

:0.01UF,

+80-20%, 150V

72982

C154

281-0528-00

C156

290-0525-00

C169

281-0576-00

C200

281-0550-00

C204

281-0629-00

CAP.,FXD,CER

DI:82PF,+/-8.2PF,500V

72982

CAP.,FXD,ELCTLT:4.7UF,20%,50V

56289

CAP.,FXD,CER

DI:11PF,5%,500V

72982

CAP.,FXD,CER

DI:120PF,10%,500V

72982

CAP.,FXD,CER

DI:33PF.,5%,600V

72982

C205

290-0522-00

C210

283-0004-00

C218

290-0522-00

C220

283-0051-00

C228

283-0594-00

CAP.

,FXD,ELCTLT:1UF,20%,50V

56289

CAP.,FXD,CER

DI:0.02UF,

+80-20%, 150V

72982

CAP.,FXD,ELCTLT:1UF,20%,50V

56289

CAP.,FXD,CER

DI:0.00330F,5%,100V

72982

CAP.

,FXD,MICA

D:0.001DF,1%,100V

00853

C229

285-1049-00

CAP

C230

285-1051-00

CAP

C270

283-0003-00

CAP

C305

281-0524-00

CAP

C310

281-0658-00

CAP

C318

281-0638-00

CAP

C339

281-0526-00.

CAP

C345

283-0178-00

CAP

C346

283-0178-00

CAP

C348

283-0003-00

CAP

C367

283-0010-00

CAP

C369

290-0522-00

CAP

C375

283-0010-00

CAP

C378

290-0410-00

CAP

C380

285-0629-00

CAP

.

,FXD,PLSTC:0.010F,1%,200V

14752

.

,FXD,PLSTC:1UF,1%,200V

14752

.,FXD,CER

DI.-O.OIOF,

+80-20%, 150V

72982

.,FXD,CER

DI:150PF,+/-30PF,500V

72982

.,FXD,CER

DI:6.2PF,+/-0.25PF,500V

72982

.,FXD,CER

DI:240PF,5%,500V

72982

.

,FXD,CER

DI:1.5PF,+/-0.5PF,500V

72982

.,FXD,CER

DI:0.1OF,

+80-20%, lOOV

72982

.

,FXD,CER

DIiO.lOF,

+80-20%, lOOV

72982

.,FXD,CER

DI:0.01UF,

+80-20%,

150V

72982

.,FXD,CER

DI:0.0'50F,

+100-20%,

50V 56289

.,FXD,ELCTLT:1UF,20%,50V

56289

.,FXD,CER

DI:0.050F,

+100-20%, 50V

56289

.

,FXD,ELCTLT:15UF,

+50-10%, lOOV

56289

.

,FXD,PLSTC:0.047UF,20%,100V

01002

C382

290-0410-00

C384

283-0267-00

C385

283-0267-00

C387

283-0267-00

C388

283-0267-00

CAP.

,FXD,ELCTLT:15UF,

+50-10%, lOOV

56289

CAP.

,FXD,CER

DI:0.01DF,20%,500V

72982

CAP.

,FXD,CER

DI:0.01UF,20%,500V

72982

CAP.,FXD,CER

DI:0.01DF,20%,500V

72982

CAP.

,FXD,CER

DI:0.01UF,20%,500V

72982

C390

283-0267-00

C391

283-0267-00

C392

283-0013-00

C394

283-0013-00

C395

283-0013-00

CAP.

,FXD,CER

DI:0.010F,20%,500V

72982

CAP.

,rxD,CER

DI:0.01DF,20%,500V

72982

CAP.,FXD,CER

DI:0.01UF,

+100-0%, lOOOV

56289

CAP.,FXD,CER

DI:0.01UF,

+100-0%, lOOOV

56289

CAP.,FXD,CER

DI:0.01UF,

+100-0%,

lOOOV

56289

C397

283-0013-00

C408

283-0279-00

CAP.,FXD,CER

DIiO.OlUF,

+100-0%, lOOOV

56289

CAP. ,FXD,CER

DIiO.OOlOF, 20%,

3000V

72982

Mfr

Part Number

670-3304-00

670-3364-00

8151-400X5R104M

2222-809-05003

187-0106-005

301-000C0G01S0G

D151E181F0

2222-809-05003

187-0106-005

301-OOOCOGO15OG

DM19E232F0500

2222-809-05003

301-050COG0110J
855-547E103Z

196D475X00S0KA1

301-O0OU2J047OM
85S-547E103Z

301-OOOU2M0820K

196D475X0050KA1

301-050COG0110J

301-OOOX5P0121K

308-000COG0330G

196D105X0050HA1

855016Z5V0203Z

196D105X0050HA1

8131N145C0G332J

D151F102F0

230B1C103F
230B1C105F

855-547E103Z

301-OOOX5UO151M

301-000C0H0629C

301-OOOZ5D0241J

301-OOOS2K0159D
8131N145651104Z

8131N145651104Z

855-547E103Z

273C20

196D105X0050HA1

273C20

30D156F1000DD4

64F19AB473

30D156F1000DD4

841-541C103M
841-541C103M
841-541C103M
841-541C103M

841-541C103M
841-541C103M

33C29A7

33C29A7
33C29A7

33C29A7

878Y5S102M

REV. B

AUG

1974

2-6

Electrical Parts

List—

SC

501

Tektronix

Serial

/Model

No.

Ckt No.

Port No.

Eff

Dscont

C412

290-0522-00

C41S

283-0343-00

C418

283-0279-00

C420

290-0164-00

C422

281-0638-00

C424

283-0057-00

C505

281-0638-00

CS14

290-0525-00

C520

290-0525-00

CS2S

290-0525-00

C527

290-0525-00

C530

290-0525-00

CS37

290-0525-00

C540

281-0638-00

CR121

152-0246-00

CR12S

152-0141-02

CR152

152-0141-02

CR154

152-0141-02

CR165

152-0233-00

CR178

152-0233-00

CR190

152-0141-02

CR200

152-0141-02

CR201

152-0141-02

CR215

152-0141-02

CR238

152-0141-02

CR280

152-0141-02

CR282

152-0141-02

CR285

152-0061-00

CR290

152-0061-00

CR334

152-0141-02

CR362

152-0141-02

CR365

152-0141-02

CR366

152-0141-02

CR382

152-0107-00

CR384

152-0107-00

CR386

152-0107-00

CR387

152-0107-00

CR389

152-0107-00

CR390

152-0107-00

CR392

152-0107-00

CR415

152-0107-00

CR416

152-0107-00

CR418

152-0107-00

CR420

152-0107-00

CR424

152-0107-00

CR540

152-0141-02

DS515

150-0109-00

JlOO

131-0955-00

JlOl

355-0170-00

Name

&

Description

CAP

.

,FXD

,

ELCTLT

;

lUF

,

20%

,

50V

CAP.,FXD,CER

DI:0.01OF,

20%,

2000V

CAP.,FXD,CER

DIsO.OOlDF,

20%,

3000V

CAP

.

,FXD

,

ELCTLT :

lOF

, +50-10%

,

ISOV

CAP.,FXD,CER

DI:240PF,5%,500V

CAP.,FXD,CER

DliO.lOF,

+80-20%,

200V

CAP.,FXD,CER

DI:240PF,S%,500V

CAP.

,FXD,ELCTLT:4.70F,20%,50V

CAP

.

,FXD

,ELCTLT : 4

.

TOT,20%

,

50V

CAP.

,FXD,ELCTLT!4.7UF,20%,50V

CAP.

,FXD,ELCTLT:4.7OF,20%,50V

CAP

.

,

FXD ,ELCTLT

!

4

. 70F , 20%

,

50V

CAP.

,FXD,ELCTLT!4.7OF,20%,50V

CAP.,FXD,CER

OI:240PF,5%,500V

SEMICOND

DEVICE:SILICON,400PIV,200MA

SEMICOND

DEVICE:

SILICON,

30V,

150MA

SEMICOND

DEVICE:

SILICON,

30V,

1

SOMA

SEMICOND

DEVICE:SILICON,30V,lS0MA

SEMICOND

DEVICE:SILICON,8SV,100MA

SEMICOND

DEVICE:SILICON,8SV,100MA

SEMICOND

DEVICE

:SILICON,

30V,

150MA

SEMICOND

DEVICE

:SILICON,

30V,

150MA

SEMICOND

DEVICE:

SILICON,

30V,

ISOMA

SEMICOND

DEVICE:

SILICON,

30V, 1

SOMA

SEMICOND

DEVICE:SILICON,30V,150MA

SEMICOND

DEVICE

:SILICC»J,

30V,

150MA

SEMICOND

DEVICE:SILICON,30V,150MA

SEMICOND

DEVICE:

SILICON, 17

SV,100MA

SEMICOND

DEVICE;

SILICON,

17

5V,100MA

SEMICOND

DEVICE :

SILICON,

30V, 1

SOMA

SEMICOND

DEVICE

:SILICON,

30V,

ISOMA

SEMICOND

DEVICE:

SILICON,

30V, ISOMA

SEMICOND

DEVICE:SILICON,

30V, ISOMA

SEMICOND

DEVICE:SILICC»J,375V,400MA

SEMICOND

DEVICE:SILICON,375V,400MA

SEMICOND

DEVICE

:SILICON,

375V,

400MA

SEMICOND

DEVICE:SILICON,37SV,400MA

SEMICOND

DEVICE:

SILICON,

375V,

400MA

SEMICOND

DEVICE:SILICON,375V,400MA

SEMICOND

DEVICE:SILICON,375V,400MA

SEMICOND

DEVICE :

SILICON

,

37 SV

,

400MA

SEMICOND

DEVICE:SILICON,37SV,400MA

SEMICOND

DEVICE:

SILICON,

375V,

400MA

SEMICOND

DEVICE:SILICON,375V,400MA

SEMICOND

DEVICE:SILICON,37SV,400MA

SEMICOND

DEVICE-.SILICON,

30V, ISOMA

LAMP

,

INCAND :

18V

,

26MA

CONNECTOR,

RCPT,

:BNC,

FEMALE

STDD,SH(XILDERED:6-32

X

0.40 INCH

LONG

Mfr

Code

Mfr Part

Number

56289

196D105X0050HA1

72982

3848-019E103M

72982

878YSS102M

56289

30D105F1S0BA4

72982

301-000ZSD0241J

56289

274C10

72982

3O1-O00Z5DO24U

56289

196D47SX0050KA1

56289

196D475X0050KA1

56289

196D475X0050KA1

56289

196D475XOOSOKA1

56289

196D475X0050KA1

56289

196D475X0050KA1

72982

301-OO0Z5D0241J

07910

CD12676

07910

1N4152

07910

1N4152

07910

1N4152

07910

CD61128

07910

CD61128

07910

1N4152

07910

1N4152

07910

1N4152

07910

1N4152

07910

1N4152

07910

1N4152

07910

1N4152

80009

152-0061-00

80009

152-0061-00

07910

1N4152

07910

1N4152

07910

1N41S2

07910

1N4152

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

80009

152-0107-00

07910

1N4152

71744

CM7220

24931

28JR200-1

80009

355-0170-00

L415^

P415^

^Furnished

as a unit

with

V415.

2-7

REV.

B

AUG

1974

Electrical

Parts List—

SC 501

Ckf

No.

Tektronix

Port No.

Seriol/Model

No.

Etf Dscont

Nome

& Description

Mfr

Code Mfr

Port

Number

Q120A,B

151-1011-00

TRANSISTOR

: SILICON

,

JFE

,

N-CHANNEL

,

DUAL 22229 FD1167

C125

151-0190-00

TRANSISTOR

: SILICON

,

NPN

04713 2N3904

Q135

151-0190-00

TRANS

ISTOR : S ILIC£»I

,

NPN

04713 2N3904

Q148

151-0190-00

TRANSI STOR ! S

ILICON,NPN

04713

2N3904

Q150

151-0188-00

TRANSISTOR

: SILICC8J

,

PNP

04713 2N3906

Q158

151-0188-00

TRANSI STOR

: S ILICON

,

PNP

04713

2N3906

Q160

151-0190-00

TRANSISTOR : SILICON

,

NPN

04713 2N3904

C165

151-0279-00

TRANSISTOR

: SILICON

,

NPN

07263

S25381

Q167

151-0190-00

TRANSI STOR : S ILICON

,

NPN

04713 2N3904

C176

151-0190-00

TRANSISTOR:

SILICON

,

NPN

04713 2N3904

Q178

151-0279-00

TRANSI STOR

: S ILICON

,

NPN

07263

S25381

Q184

151-0342-00

TRANS

ISTOR

: SILICON

,

PNP

07263

2N4249

Q190

151-0341-00

TRANSISTOR : SILICON

,

NPN

07263 2N3565

Q230A,B

151-1054-00

TRANSISTOR

: SILIOXJ

,

JFE ,N-CHANNEL

.DUAL

22229 FD1644

C240

151-0190-00

TRANSISTOR

: SILICON

,

NPN

04713 2N3904

Q250

151-0190-00

TRANSISTOR:SILICON,NPN

04713 2N3904

C252

151-0342-00

TRANSISTOR

: S ILICCM

,

PNP

07263

2N4249

C270

151-0342-00

TRANSISTOR

: SILICCM

,

PNP

07263

2N4249

Q285

151-0347-00

TRANSISTOR

: S ILICON

,

NPN

80009

151-0347-00

Q290

151-0347-00

TRANSISTORiSlLICON

,NPN

80009

151-0347-00

5305A,B

151-1054-00

TRANSISTOR

: SILICON

,

JFE

,

N-CHANNEL

,

DUAL

22229 FD1644

Q315

151-0341-00

TRANS

ISTOR

: SILICON

,

NPN

07263 2N3565

C320

151-0341-00

TRANSISTOR:SILICON,NPN

07263

2N3565

C336

151-0342-00

TRANSI STOR : S

ILICON,PNP

07263 2N4249

C345

151-0350-00

TRANSI STOR : SILICON,PNP

07263

2N5401

Q348

151-0347-00

TRANS

ISTOR : S ILICON

,

NPN

80009

151-0347-00

C350

151-0301-00

TRANSISTOR

: S ILICON

,

PNP

04713

2N2907A

Q360

151-0519-00

TRANSISTOR:SILICON,SCR

04713

2N5063

C365

151-0254-00

TRANSISTOR

: SILICON

,

NPN

03508 2N5308

0370

151-0301-00

TRANSISTOR

: SILICON

,

PNP

04713 2N2907A

Q380

151-0358-00

TRANSISTOR:SILICON,NPN,SEL

FROM D44R4 03508

D44R211

0500

151-0190-00

TRANSI STOR : S

ILICON

,

NPN

04713 2N3904

0510

151-0342-00

TRANSISTOR

: SILICON

,

PNP

07263 2N4249

0520

151-0208-00

TRANSISTOR : SILICtW , PNP

12040 2N4036

0525

151-0341-00

TRANS

ISTOR : SILICON

,

NPN

07263

2N3565

0530

151-0342-00

TRANSISTOR: SILICON

,

PNP

07263

2N4249

0535

151-0136-00

TRANS

ISTOR

: S ILICON

,

NPN

02735 35495

0540

151-0342-00

TRANSISTOR

: SILICON, PNP

07263

2N4249

0545

151-0341-00

TRANSISTOR: S

ILICON

,

NPN

07263 2N3565

RlOO

315-0201-02

RES.,FXD,CC»0>:200

OHM,5%,0.25W

01121 CB2015

R105

322-0621-00

RES.,FXD,FILM:900K CNm,l%,0.25W

75042 CEBT0-9003F

R107

321-0617-00

RES.

,FXD,

FILM: lllK OHM,1%,0.125W 75042

CEAT0-1113F

R113

322-0624-00

RES. ,FXD,FIU!:990K

OHM,1%,0.25W

75042 CEBT0-9903F

R115

321-0614-00

EES. ,FXD,Fim:10.1K

C«M,1%,0125W

75042 CEAT0-1012F

R117

321-0481-00

RES.,FXD,FIm:lM OHM,1%,0.125W

75042 CEAT0-1004F

R120

315-0104-00

RES.,FXD, COMP :100K CNm,5%,0.25W

01121

CB1045

R121

315-0201-00

RES.

,FXD,COMP:20O OHM,5%,0.25W

01121 CB2015

R125

321-0184-00

RES. ,FXD,FILM:806 OHM,1%,0.125W

75042

CEAT0-8060F

R127

321-0242-00

RES.,FXD,FILM:3.24K

OHM,1%,0.125W

75042 CEAT0-3241F

R129

321-0086-00

EES. , FXD,FILM:

76.

8 OHM,1%,0.125W

75042

CEAT0-76R80F

R130

311-1182-00

RES.

,VAR,NONWIR:1.5X

OHM, 10%, 0.

SOW

01121 W-783S

R132

311-1560-00

RES. ,VAR,NONWIR:5K OHM,

5%,

0, SOW

73138

91A-500CW1

R134

321-0242-00

RES, ,FXD,FILM:3.24K

CNiM,l%,0.12SW 75042

CEAT0-3241F

R136

321-0181-00

EES.

,FXD,FILM:750 OHM,1%,0.125W 75042

CEAT0-7500F

REV. B AUG 1974

2-8

Electrical

Parts

List—

SC

501

Ckt No.

Tekfronix

Port No.

Serial /Model No.

Eff Dscont Name

&

Description

Mfr

Code

Mfr Part Nur

R138 31S-0S60-00

RES.,

FXD,

COMP:

56

OHM,5%,0.25W

01121

CB560S

R139

315-0472-00

RES.,FXD,COMP:4.7K OHM,5*,0.25W

01121 CB4725

R142

311-1558-00

R£S.,VAR,t)ONWIR:20R (%M ,

20%

,

0

. SOW

73138 91A-20001M

R145

311-1298-00

RES.,VAR,NOtJWIR.-10K

OHM,

20%,

0.

SOW

01121

W7909

R146

315-0622-00

RES.,FXD,COMP:

6.

2K 0HM,5%,0.25W

01121

CB6225

R147

315-0155-00

RES.,FXD,COMP:1.5M

OHM,5%,0.25W

01121

CB1555

r148

315-0103-00

RES.

,

FXD,

COMP: lOK OHM,5%,0.25W

01121

CB1035

R150

321-0221-00

RES.,FXD,FILM:1.96K

OHM,1%,0.125W

75042 CEAT0-1961F

R1S2

321-0230-00

RES.,FXD,FILM:2.43K OHM,1%,0.125W

75042

CEAT0-2431F

R154

321-0155-00

RES.,FXD, FILM:402 OHM,l% ,0.12SW

75042

CEATO-4020F

R156

321-0230-00

RES.,FXD,FILM:2.43K OHM,1%,0.125W

75042

CEAT0-2431F

Rise

321-0221-00

RES.,FXD,FIIM:1.96K

OHM,1%,0.125W

75042

CEAT0-1961F

R160

315-0103-00

RES.,FXD, COMP :10K

OHM,S%,0.2SW

01121

CB1035

R165

308-0293-00

RES.,FXD,WW:4K OHM,5%,3W

91637

RS2B-B40000J

R167

322-0210-00

RES. ,FXD,FILM:1.5K CHM,1%,0.25W

75042

CEBT0-1501F

R169

321-0184-00

RES.

,

FXD,

FILM:

806

OHM,1%,0.125W

75042

CEATO-8060F

R172

311-1563-00

RES. ,VAR,N0NWIR:1K OHM,

20%,

0. SOW

73138

91A-10000M

R174

315-0392-00

RES.,FXD,COMP:3.9K CMffl,5%,0.25W

01121

CB392S

R176

322-0210-00

RES. ,FXD,FILM:1.5K OHM,1%,0.25W

75042

CEBT0-1501F

R178

308-0293-00

RES.,FXD,WW:4K

OHM,5%,3W

91637

RS2B-B40000J

R184

315-0622-00

RES. , FXD,

COMP

:6.2K

OHM,5%,0.2SW

01121

CB6225

Riee

311-1565-00

RES.,VAR,NONWIR:250 OHM,

20%,

0.

SOW 73138

91A250R0M

R187

315-0331-00

RES.

,

FXD,

COMP :330 OHM,5%,0.25W

01121

CB3315

R189

315-0561-00

RES.,FXD,

COMP:

560

OHM,5%,0.25W

01121

CB5615

R190

315-0182-00

RES. ,

FXD,

COMP

:1.8K

C«M,5%,0.2SW

01121

CB1825

R192

315-0272-00

RES.

,FXD,COMP:2.7K

OHM,5%,0.25W

01121

CB2725

R200

315-0223-00

RES.,FXD,COMP:22K CMM,5%,0.25W

01121

CB2235

R205

315-0332-00

RES.,FXD,CC»a>:3.3K

C»M,5%,0.25W

01121

CB3325

R210

311-1686-00

RES.,VAR,NONWIR:2.5K OHM,20%,1W

01121

12M358

R212

311-1559-00

RES. ,VAR,NONWIR:10K

OHM,

20%,

0.

SOW

73138

91A-10001M

R214

315-0333-00

RES.,FXD,

COMP:

3

3K

OHM,5%,0.25W

01121

CB3335

R215

315-0122-00

RES.,FXD,COMP:1.2K

OHM,5%,0.25W

01121

CB1225

R220

315-0223-00

RES.,

FXD,

COMP

:22K

OHM,5%,0.25W

01121

CB2235

R22S

311-1686-00

RES.

,VAR,N0NWIR:2.5K OTM,20%,1W

01121

12M358

R226

311-1564-00

RES.,VAE,NONWIR:500 CMM,20%,0.50W

73138

91A-500R0M

R228

321-0368-00

RES.,FXD,FILM:66,SK

OHM,1%,0.125W

75042

CEAT0-6652F

R229

322-0464-00 RES. ,FXD,FILM:665K

OHM,1%,0.25W

75042

CEBT0-6653F

R230

323-0557-08

RES.,FXD,FILM:6.19M OHM,1%,0.50W

75042

CECT2-6194F

R231

321-0450-00

RES., FXD,FILM :475K

OHM,1%,0.125W

75042

CEAT0-4753F

R235

311-1558-00

RES. ,VAR,NONWIR:20K

OHM, 20%,

0.

SOW

73138

91A-20001M

R236

315-0433-00

RES.,FXD, COMP:

4

3K

OHM,5%,0.25W

01121

CB4335

R238

315-0432-00

RES.,FXD,COMP:4.3K OTM,5%,0.25W

01121 CB4325

R240

315-0103-00

RES. , FXD,

COMP: lOK

OHM,5%,0.25W

01121

CB1035

R242

315-0303-00

RES., FXD, COMP :30K

OHM,5%,0.25W

01121

CB3035

R245

311-1558-00

RES.

,VAR,N0NWIR;20K OHM,

20%,

0.

SOW

73138

91A-20001M

R248

315-0562-00

RES. ,FXD,COMP:5.6K C«M,5%,0.25W

01121

CB5625

R250

315-0103-00

RES. , FXD,COMP: lOK

OHM,S%,0.25W

01121

CB103S

R251

315-0471-00

RES.,FXD, COMP: 4

70

OHM,5%,0.25W

01121

CB471S

R252

321-0246-00

RES.,FXD,FILM:3.57K

CMM,1%,0.125W

75042

CEAT0-3S71F

R254

321-0259-00

RES. ,FXD,FILM:4.87K OHM,1%,0.12SW

75042

CEAT0-4871F

R256

315-0512-00

RES.,FXD,C0MP:S.1K OHM,5%,0.25W

01121 CB5125

R2S8

311-1564-00

RES. ,VAR,NONW1R:500

OHM

,

20%

,0.

SOW

73138

91A-5O0R0M

R260

315-0821-00

RES,,FXD, COMP:

820

OHM,5%,0.25W

01121

CB8215

R265

311-1561-00 RES. ,VAR,N0NWIR:2.5K OHM,

20%,

0. SOW

73138

91A-25000M

R267

321-0259-00

RES. ,FXD,FILM:4.87X

OBM,1%,0.125W

75042

CEAT0-4871F

2-9

REV. B

AUG

1974

Electrical Parts List

—SC

501

Ckt

No.

Tektronix

Port

No.

Seria

Eff

1

/Model

No.

Dscont

Nome

&

Description

Mfr

Code Mfr Part

Number

R270

321-0246-00 RES.

,FXD,FILM:3.57K OHM.l*

.0.125W 75042

CEAT0-3571F

R272

315-0222-00

RES.

,FXD,COMP:2.2K

C»IM,5%,0.25W

01121

CB2225

R273

315-0912-00

RES.,FXD,C«a>!9.1K

C«M,5%,0.25W

01121 CB9125

R275

311-1298-00 RES.

,VAR,fKMWIR:10K C«JM , 20% , 0 .

SOW

01121 W7909

R280

315-0102-00

RES.,FXD,CCMP:1K

OHM,5%,0.25W

01121 CB1025

R285

308-0412-00

RES.,FXD,WW:8.2K

OHM,l%,3W

91637 RS288201F

R287

321-0243-00

RES.,FXD,FIU<:3.32K

OHM,1%,0.125W

75042

CEAT0-3321F

R289

321-0193-00 RES.

,FXD,FIU1:1K

CMM,1%,0.125W

75042 CEATO-IOOIF

R291

321-0243-00

RES.

,FXD,FIIA!:3.32K

OHM,1%,0.125W

75042 CEAT0-3321F

R294

308-0412-00

RES.

,FXD,WW:8.2K

OHM,l%,3W

91637 RS288201F

R300

311-1555-00

RES.,VAR,NONWIR:100K

C«M,20%,0.5W

73138 91A-10002M

R302

315-0153-00

RES.

,FXD,CCMP:15K OHM,5%,0.25W

01121 CB1535

R303

315-0512-00

RES.

,FXD,COMP:5.1K

OHM,5%,0.25W 01121 CB5125

R305

315-0392-00

RES.

,FXD,COMP:3.9K

C«M,5%,0.25W

01121 CB3925

R307

315-0332-00

RES.

,FXD,CCMP:3.3K

OTM,5%,0.25W

01121

CB3325

R310

315-0243-00

RES.

,FXD,COMP:24K

OHM,5%,0.25W

01121

CB2435

R315

315-0273-00

RES.

,FXD,C0MP:27K

OHM,5%,0.25W

01121

CB2735

R316

315-0273-00

RES.,FXD,CX»G>:27K

OHM,5%,0.25W

01121 CB2735

R318

315-0103-00

RES.

,FXD,COMP:10K

C»M,5%,0.25W

01121

CB1035

R320

315-0222-00

RES.,FXD,C0MP:2.2K

C»JM,5%,0.25W

01121 CB2225

R324

321-0226-00

RES.

,FXD,FILM:2.21K

OHM,1%,0.125W

75042 CEAT0-2211F

R326

321-0298-00

RES.,FXD,FIU<:12.4K

QHM,1%,0.125W

75042 CEAT0-1242F

R328

315-0113-00

RES.,FXD, COMP :11K

C»M,5%,0.25W

01121 CB1135

R330

311-1298-00

RES.,VAR,NONWIR:10K

CttiM,20%,0.50W

01121

W7909

R334

315-0184-00

RES.

, FXD,

COMP: 180K

OHM,S%,0.25W

01121

CB1845

R336

315-0222-00

RES.,FXD,CC«P:2.2K

C«m,5%,0.25W

01121

CB2225

R337

315-0472-00

RES.,FXD,COMP:

4.

7K

C«M,5%,0.25W

01121

CB4725

R339

321-0344-00

RES.,

FXD,FILM: 37.

4K OHM,1%,0.125W

75042 CEAT0-3742F

R342

315-0683-00

RES.,FXD,COMP:68K

OHM,5%,0.25W

01121 CB6835

R343

315-0682-00

RES.

,FXD,COMP:6.8K

OHM,5%,0.25W

01121 CB6825

R345

315-0471-00

RES. ,

FXD,

COMP :470

OHM,5%,0.25W

01121 CB4715

R346

315-0182-00

RES.

,FXD,COMP:1.8K

OHM,5%,0.25W

01121 CB1825

R348

315-0101-00

RES.,FXD,

COMP:

100

OHM,5%,0.25W

01121 CB1015

R352

315-0102-00

RES.

, FXD,COMP: IK

OHM,5%,0.25W

01121

CB1025

R354

315-0472-00.

RES. , FXD,

COMP: 4. 7K

C«M,5%,0.25W

01121 CB4725

R356

315-0183-00

RES.,FXD,

COMP

:18K

OHM,5%,0.25W

01121 CB1835

R357

315-0102-00

RES. , FXD,

COMP: IK OHM,5%,0.25W

01121 CB1025

R362

321-0645-00

RES.

, FXD, FILM:

lOOK

OHM,0.5%,0.125W

75042 CEAT2100KD

R363

315-0102-00

RES. ,

FXD,

COMP: IK

Omi,5%,0.25W

01121 CB1025

R365

315-0103-00

RES.

, FXD, COMP: 1OK

OHM,5%,0.25W

01121

CB1035

R367

315-0103-00

RES.

,

FXD,

COMP: 1OK

OHM,5%,0.25W

01121 CB1035

R369

315-0101-00

RES.

,FXD,CCWP:100

OHM,5%,0.25W

01121

CB1015

R370

315-0222-00

RES.

,FXD,COMP:2.2K

OHM,5%,0.25W

01121 CB2225

R372

315-0682-00

RES.

,FXD,COMP:6.8K

OHM,5%,0.25W

01121 CB6825

R374

315-0472-00

RES. , FXD,

COMP :4.7K

OHM,5%,0.25W

01121 CB4725

R375

315-0101-00

RES.

, FXD,

COMP: 100

OHM,5%,0.25W

01121

CB1015

R378

315-0100-00

REE. , FXD,

COMP:

10

OHM,5%,0.25W

01121 CB1005

R380

315-0100-00

RES.

,FXD,COMP:10

OHM,5%,0.25W

01121 CB1005

R382

315-0220-00

RES. , FXD,

COMP

:22

OHM,5%,0.25W

01121 CB2205

R392

315-0822-00

RES.

,FXD,COMP:8.2K

OHM,5%,0.25W

01121

CB8225

R395

315-0203-00

RES.,FXD,CX»IP:20K

OHM,5%,0.25W

01121

CB2035

R397

315-0100-00

RES. , FXD,

COMP :10

OHM,5%,0.25W

01121 CB1005

R398

315-0100-00

EES.

,FXD,COMP:10

OHM,5%,0.25W

01121 CB1005

R400

321-0481-00

RES.

,FXD,FILM:1M

OHM,1%,0.125W 75042

CEAT0-10O4F

R402

321-0481-00

RES.

,FXD,FILM:1M

OHM,1%,0.125W 75042 CEAT0-1004F

REV. B AUG

1974

2-10

Electrical

Parts

List—

SC 501

Ckf

No.

Tektronix

Port

No.

Serial/Modet No.

Eff Dscont

Nome

&

Description

Mfr

Code Mfr Part

Number

R405

311-1312-00

R£S.,VAR,N0NWIR:5M

OHM,20%,1W

01121 10M156A

R406 321-0481-00

RES,,FXD,Fn«;lM

OHM,1%,0.125W 75042 CEAT0-1004F

R407 321-0481-00

RES.,

FXD,FILM :1M 0HM,1%,0.125W

75042 CEAT0-1004F

R408 321-0481-00

RES.

,FXD,FIIM:1M C»]M,1%,0.12SW 75042 CEAT0-1004F

R410

315-0106-00

RES.,FXD,COMP :lC»t OHM,5%,0.2SW

01121 CB1065

R412

321-0377-00

RES.,FXD,FIIM:82.5K

OHM,1%,0.125W

75042 CEAT0-8252F

R413

321-0354-00

RES.,FXD,FILM:47.5K

0HM,1%,0.125W 75042 CEAT0-4752F

R414

315-0822-00

RES.,FXD,COMP:8.2K

OHM,S%,0.25W

01121

CB8225

R415

311-1558-00

RES.,VAR,IK)NWIR:20K

C*M,20%,0.50W 73138 91A-20001M

R422

315-0334-00

RES.,FXD,COMPs330K

OHM,5%,0.25W

01121

CB3345

R424 315-0222-00

RES. ,FXD,COMP:2.2K

OHM,5%,0.25W 01121 CB2225

R42S

311-1554-00

RES.,VAR,NONWIR:200K

OHM,20»,0.5bW 73138 91A-20002M

R500 311-1564-00

RES.,VAR,N0NWIR:500

OHM,

20%, 0.

SOW 73138

91A-500R0M

RSOl

321-0222-00

RES.,FXD,FIIM:2K

OHM,1%,0,125W 75042 CEATO-2001F

R502

321-0252-00

RES.,FXD,FIIM:4.12K

OHM,1%,0.125W

75042

CEAT0-4121F

R504

315-0222-00

RES.,FXD,COMP:2.2K

OHM,5%,0.25W

01121

CB2225

R506

315-0102-00

RES.,

FXD,COMP: IK CX1M,5%,0.25W

01121 CB102S

R507

315-0621-00

RES.,FXD,COMP:620

OHM,5%,0.25W

01121

CB6215

R510

315-0822-00

RES.,FXD,COMP:8.2K

OHM,5%,0.25W 01121 CB8225

R512

307-0115-00

RES.,

FXD,COMP:

7. 5 OHM,5%,0.25W 01121 CB75G5

R514 315-0201-00

RES.,

FXD,COMP:

200

OHM,5%,0.25W

01121

CB201S

RSIS

308-0218-00

RES.,FXD,WW:150

OHM,5%,3W 56289 242E1S1J

R520

315-0102-00

RES.,

FXD,COMP: IK OHM,5%,0.25W

. 01121

CB1025

R522

321-0237-00

RES.,

FXD,FILM:

2. 87K

OHM,1%,0.12SW

75042 CEAT0-2871F

R523

321-0226-00

RES.,FXD,FILM:2.21K 0HM,1%,0.125W

75042 CEAT0-2211F

RS25

315-0121-00

RES.,FXD,

COMP:

120

OHM,5%,0.25W

01121 CB1215

R527

315-0121-00

RES.,FXD,COMP:120

OHM,S%,0.25W

01121 CB1215

R532

321-0226-00

RES. ,FXD,FIIM:2.21K

OHM,1%,0.125W 75042 CEAT0-2211F

RS33

321-0237-00

RES.,FXD,FIIM:2.87K

OHM,1%,0.125W 75042 CEATO-2871F

R535

315-0102-00

RES. ,

FXD,COMP: IK C«M,5%,0.25W

01121 CB1025

R537

308-0385-00

RES.,FXD,WW:200

0HM,5%,3W 63743

35326

RS40

315-0622-00

RES.,FXD,COMP:6.2K C»m,5%,0.25W

01121 CB6225

R542 321-0289-00

RES.,FXD,FILM:10K

OHM,1%,0.125W

75042 CEAT0-1002F

R543

321-0289-00

RES.,FXD,FIIM;10K

OHM,1%,0.125M 75042 CEAT0-1002F

R545

315-0102-00

RES. ,

FXD,COMP: IK 0HM,S%,0.25W

01121 CB1025

R546

315-0621-00

RES.,

FXD,

COMP :620

OHM,S%,0.25W

01121 CB6215

R548 315-0822-00

RES.,FXD,COMP:8.2K

OHM,5%,0.25W 01121 CB822S

RS50

307-0109-00

RES.,FXD,C0MP:8.2

0HM,5%,0.25W

01121 CB82G5

SlOO

260-1445-00

SWITCH,

PUSH:

80009

260-1445-00

S110A,B

260-1365-00

SWITCH,

PUSH:

80009

260-1365-00

S200

260-1470-00

SWITCH

,

SLIDE : DPDT

,

0

.

5A

,

12

5V

10389

23-021-309

S220A,B

260-1365-00

SWITCH,

PUSH:

80009

260-1365-00

S225

260-1332-00

SWITCH,

PDSH:1

BUTTON,

MS

71590

2KHB010010-XXX

S230

260-0723-00

SWITCH

,

SLIDE : DPDT

,

0 . 5A

,

12 SVAC 80009

260-0723-00

T380

120-0863-00

XFMP,PWR,SDN

fi:HV 80009

120-0863-00

U200

155-0055-00

MICROCIRCUIT

LI :TRIG SWP 80009

155-0055-00

U310

156-0105-00

MICROCIRCUIT,

LI :OPERATIONAL AMPLIFIER 27014

LM301AN

V415

154-0699-00

ELECTRON TUBE: 80009

154-0699-00

VR280

152-0279-00

SEMICOND DEVICE:ZENER,0.4W,5.1V,5%

07910

1N751A

VR350 152-0283-00

BOlOlOO B029999X SEMICOND

DEVICE:ZENER,0.4W,43V,S%

04713

1N976B

VR352 152-0241-00

BOlOlOO B029999 SEMICOND DEVICE:ZENER,0.4W,33V,5% 04713 1N973B

VR352

152-0357-00

B030000 SEMICOND

DEVICE:

ZENER,

0.4W,

82V,

5% 04713

1N983B

VRSOO

152-0280-00

SEMICOND DEVICE:ZENER,0.4W,6.2V,5% 04713 1N7S3A

2-11

REV.

B AUG

1974

sc

501

MECHANICAL

REPLACEABLE PARTS LIST

PARTS

ORDERING

INFORMATION

Replacement

parts are

available

from

or

through your

local

Tektronix, Inc.

Field

Office or

representative.

Changes to

Tektronix

instruments

are sometimes

made

to

accommodate

improved

components as

they become

available,

and

to give you

the benefitofthe

latest circuit

improvements

developed in

our

engineering

department.

It

is

therefore

important,

vi/hen

ordering parts, to

include the

following

information

in your

order; Part

number, instru-

ment type

or

number,

serial

number, and

modification

number if

applicable.

If

a

part you

have

ordered has

been replaced

with

a

new

or

improved part,

your

local

Tektronix, Inc.

Field

Office or

representative

will contact

you

concerning

any change in

part

number.

Change

information, if

any, is

located

at

the rear of this

manual.

SPECIAL

NOTES AND

SYMBOLS

XOOO

Part

first added at

this serial number

OOX

Part

removed

after this

serial

number

FIGURE

AND INDEX NUMBERS

Items in this

section

are referenced

by

figure and index

numbers

to

the illustrations.

INDENTATION SYSTEM

This mechanical parts

list

is indented to irxficate

item

relationships. Following is an example of the

indentation

system

used in the description column.

1

2

3 4 5

Name

&

Description

Assembly and/or

Component

Attaching parts

for

Assembly and/or Component

Detail

Part of Assembly

and/or

Component

Attaching

parts

for Detail Part

«

Parts of Detail Part

Attaching parts for Parts of

Detail

Part

Attaching

Parts

always

appear

in the same indentation as

the item

it

mounts,

while the detail parts are irxlented

to

the right. Irxlented items

are

part of,

and included with,

the

next

higher indentation.

The separation symbol

—

*

—

irxlicates

the end

of

attaching

parts.

Attaching

parts

must be purchased separately,

unless

otherwise specified.

ITEM NAME

In the Parts List,

an

Item

Name

is separated from the

description by a

colon

(:).

Because of

space limitations,

an

Item

Name

may sometimes appear

as

incomplete.

For

further

Item Name

identification,

the

U.S.

Federal

Cataloging

Handbook

H6-1 can be

utilized

where

{possible.

2-12

Mechanical Parts List—SC 501

ABBREVIATIONS

"

INCH

FLH PLAT HEAD

PWR

POWER

f

NUMBER

SIZE

PLTR FILTER

RCPT

RECEPTACLE

actr ACTUATOR

FR FRAME or

FRONT

RES

RESISTOR

ADPTR ADAPTER

PSTNR FASTENER

RDG

RIGID

ALIGN

alignment

FT

FOOT

RLF

RELIEF

AL

ALUMINUM

FXD

FIXED

RTNR

RETAINER

ASSEH

ASSEMBLED

GSKT GASKET

SCH

SOCKET

HEAD

ASSY

ASSEMBLY

HDL

HANDLE

SCOPE

OSCILLOSCOPE

ATTEN

ATTENUATOR

HEX

HEXAGON

SCR

SCREW

AWG

AMERICAN

WIRE GAGE HEX HD

HEXAGONAL

HEAD SE

SINGLE END

BD

BOARD

HEX SOC

HEXAGONAL SOCKET

SECT

SECTION

BRKT

BRACKET

HLCPS

HELICAL

COMPRESSION

SEMICOND

SEMICONDUCTOR

BRS

BRASS

HLEXT

HELICAL EXTENSION

SHLD

SHIELD

BRZ

BRONZE

HV HIGH VOLTAGE

SRLDR

SHOULDERED

BSHG BUSRING

IC INTEGRATED

CIRCUIT

*

SKT

SOCKET

CAB

CABINET

ID

IVSIDE

DIAMETER SL

SLIDE

CAP

CAPACITOR

IDENT

IDENTIFICATION

SLFLKG

SELF

-LOCKING

CER

CERAMIC

IMPLR

IMPELLER

SLVG

SLEEVING

CHAS

CHASSIS

IN INCH

SPR

SPRING

CKT

CIRCUIT

INCAND INCANDESCENT

SQ

SQUARE

COMP

COMPOSITION

INSUL

insulator

SST

STAINLESS

STEEL

CONN

CONNECTOR

INTL INTERNAL

STL

STEEL

COV

COVER

LPHLDR

LAMPHOLDER

SW

SWITCH

CPLG

COUPLING

MACH

MACHINE

T

TUBE

CRT CATHODE

RAY TUBE

MECH MECHANICAL

TERM

TERMINAL

DEG

DEGREE

MTG MOUNTING

THD

THREAD

DWR

DRAWER

NIP NIPPLE

THK

THICK

ELCTRN

ELECTRON

NON WIRE

NOT

WIRE WOUND

TNSN

TENSION

ELEC

ELECTRICAL

OBD ORDER BY

DESCRIPTION

TPG

TAPPING

ELCTLT

ELECTROLYTIC

OD OUTSIDE

DIAMETER

TRH

TRUSS

HEAD

ELEM

ELEMENT

OVH OVAL HEAD

V

VOLTAGE

EPL

ELECTRICAL PARTS LIST

PH BRZ

PHOSPHOR BRONZE

VAR

VARIABLE

EQPT EQUIPMENT

PL

PLAIN or

PLATE

w/

WITH

EXT

EXTERNAL

PLSTC

PLASTIC

WSHR

WASHER

FIL

FILLISTER HEAD

PN

PART NUMBER

XFMR

TRANSFORMER

FLEX

FLEXIBLE

PNH

PAN

HEAD

XSTR

TRANSISTOR

CROSS

INDEX MFR. CODE

NUMBER TO

MANUFACTURER

MFR.CODE

MANUFACTURER

ADDRESS

CITY.STATE.ZIP

00779

AMP, Inc.

P. 0.

Box 3608

Harrisburg,

PA 17105

01295

Texas

Instruments, Inc.,

Components

Group

P. 0. Box

5012

Dallas,

TX

75222

10389 Chicago

Switch, Inc.

2035

Wabansia Ave.

Chicago, IL

60647

22526 Berg

Electronics, Inc.

Youk

Expressway

New Cumberland,

PA

17070

24931 Specialty

Connector

Co.,

Inc.

3560 Madison

Ave.

Indianapolis,

IN

46227

45722

USM Corp.,

Parker-Kalon Fastener

Div.

1

PeeRay

Drive

Clifton,

NJ

07014

71159

Bristol

Socket

Screw,

Div.

of

American Chain

and

Cable Co., Inc. P. 0. Box

2244

Waterbury,

CT

06720

71590

Centralab

Electronics, Div.

of

Globe-Union,

Inc.

5757

N.

Green Bay

Ave.

Milwaukee,

WI

53201

73743

Fischer

Special Mfg. Co.

446 Morgan St.

Cincinnati,

OH

45206

74445

Holo-Krome Co.

31 Brook St.

West

Hartford,

CT

06110

78189

Illinois Tool

Works,

Inc.

Shakeproof

Division St.

Charles

Road

Elgin,

IL

60126

79807

Wrought

washer Mfg.

Co.

2100 S. 0 Bay St.

Milwaukee,

WI

53207

80009

Tektronix, Inc.

P. 0. Box 500

Beaverton,

OR 97005

82647 Texas

Instruments,

Inc.

Control Products

Div.

34 Forest St.

Attleboro,

MA 02703

85385

Central

Screw Co.

2530

Crescent

Dr.

Broadview,

IL 60153

85471 Boyd, A. B.,

Co.

1233

Howard

St.

San

Francisco,

CA

94103

2-13

Mechanical

Parts

List—

SC

501

FIGURE

1

EXPLODED

Rg. &

Index

Tektronix Serial/Model No.

Mfr

No.

Port

No.

Eff

Osconf

i34 s

Nome

& Deicription

Code Mfr

Port

Number

1-1 337-1399-00 2

SHLD , ELECTRICAL

:

S IDE

80009 337-1399-00

-2 366-0494-00

3

KNOB: GRAY

WITH

SETSCREW

80009 366-0494-00

-

.

EACH KNOB INCLUDES:

213-0153-00 1

.

SETSCREW:5-40

X 0.125 INCH, HEX

SOC

STL 74445

OBD

-3

366-1173-03 2 KNOB : CHARCOAL

,

W/SETSCREW

80009

366-1173-03

-

.

EACH KNOB

INCLUDES:

213-0239-00 1

.

SETSCREW:3-48

X 0.062 INCH, STL

71159 OBD

-4

366-1257-27

1

PUSHBUTTON:

GRAY,AC COUP

80009

366-1257-27

-5

366-1257-54 1 PUSHBUTTON : GRAY

,

10

OMV

80009

366-1257-54

-6

366-1257-55

1

PUSHBUTTON

: GRAY

,

IV

80009

366-1257-55

-7

366-1257-87 1 PUSHBUTT0N:GRAY

, XIO

80009

366-1257-87

-8

366-1402-41

1 PUSHBUTTON

:

GRAY

, XI0

80009

366-1402-41

-9

366-1422-01 1 KNOB: LATCH

80009

366-1422-01

-10 214-1840-00 1 PIN, KNOB SECRG:

80009

214-1840-00

-11

366-1489-74

1

PUSHBUTTON : GRAY

,

MS

80009

366-1489-74

-12 426-0681-00

6

FR.PUSH

BUTTON:GRAY PLASTIC

80009

426-0681-00

-13 384-1114-02

2 EXTENSION SHAFT:

80009

384-1114-02

-14 220-0633-00

1

NUT,

PLAIN,

KNURL:0.

50-28

X 0.25 INCH,BRS

80009 220-0633-00

-15 355-0170-00

1

STUD,BDG POST:6-32

X

0.40

INCH LONG

80009

355-0170-00

-16

131-0955-00 1

CONNECTOR

,

RCPT

,

: BNC

,

FEMALE

24931

28JR200-1

-17 2

RES,VAR, NONWIRE:

(SEE

R2104R225 EPL)

(ATTACHING PARTS)

-18 210-0583-00

2

NUT, PLAIN, hex.

:0.

25-32

X

0.312 INCH,BRS

73743

2X20319-402

-19 210-0940-00

2

WASHER,FLAT: 0.2

5 ID X

0.375 INCH

OD,STL

79807

OBD

-20

358-0378-00 2

BUSHING, SLEEVE:

PRESS MOUNT

80009

358-0378-00

-21 260-1470-00

1

SWITCH , SLIDE : DPDT

, 0 .

5A ,

12SVAC

10389 23-021-309

-22

1

RES,

VAR: (SEE

R130

EPL)

(ATTACHING

PARTS)

-23 210-0583-00

1

NUT,

PLAIN, HEX.

:

0.25-32

X 0.312

INCH,BRS

73743

2X20319-402

-24

210-0940-00

1

WASHER, FLAT:

0.2

5 ID X

0.375 INCH OD,STL 79807

OBD

-25

333-1890-00

1

PANEL,

FRONT:

SC 501

80009

333-1890-00

-26

214-1513-01

1

LCH,

PLUG-IN

RET:

80009 214-1513-01

(ATTACHING

PARTS)

-27

213-0254-00 1

SCR,TPG,THD

CTG:2-56X0.25"100

DEG,FLH STL 45722

OBD

-28

200-0935-00 1

BASE,

LAMPHOLDER;

0.2

9 OD

X

0.19"

L,BK PLSTC

80009

200-0935-00

-29

378-0602-00

1

LENS , L

IGHT :

GREEN

80009

378-0602-00

-30

352-0157-00 1

LAMPHOLDER:

WHITE PLASTIC

80009 352-0157-00

-31

200-1555-01

1

BEZEL,

CRT:

80009

200-1555-01

(ATTACHING

PARTS)

-32

211-0101-00

2

SCREW,MACHINE:4-40

X

0.25"

100 DEG,FLH

STL 83385 OBD

-33

386-2641-01

1

SUBPANEL

,

FRONT : PLASTIC

80009

386-2641-01

(ATTACHING

PARTS)

-34

213-0229-00

3

SCR,TPG,THD.

FOR:6-20X0.375

100 DEG,FLH

STL

83385 OBD

-35

337-2026-00 1 SHIELD, ELEC:

REAR

SUBPANEL

80009 337-2026-00

-36

384-1216-00 1

EXTENSION

SHAFT:

6.

375 INCH

LONG

80009

384-1216-00

-37

384-1217-00 1

EXTENSION

SHAFT:

8.

4 5 INCH

LONG

80009

384-1217-00

-38

384-1099-00 2

EXTENSION

SHAFT:PUSH BUTTON, 1.54

INCH

LONG

80009

384-1099-00

-39

354-0423-00 1 RING ,

SPRT

,

CRT :

RUBBER

80009

354-0423-00

-40

348-0279-00 1 CUSHION, CRT:

85471

OBD

-41

337-1458-03

1

SHLD, ELECTRON

T:

80009

337-1458-03

(ATTACHING

PARTS)

-42

211-0101-00

1

SCREW,MACHINE:4-40

X

0.25’

100 DEG,FLH STL

83385 OBD

-43

136-0611-00 1

SKT,ELCTRN

TUBE:

.

SKT,

ELECTRON

TUBE ASSEMBLY INCLUDES:

.

SKT,ELCTRN

TUBE:

80009

136-0611-00

136-0453-00 1

80009

136-0453-00

131-1109-00 10

.

CONTACT,

ELEC:

00779

42869-6

-44

343-0403-00

1

CLAMP,

XSTR:

80009

343-0403-00

(ATTACHING

PARTS)

-45

211-0114-00

1

SCREW,

MACHINE

:4-40

X 0.438

INCH

L,FLH STL 83385 OBD

-46

342-0082-00 1 INSULATOR PL;

80009

342-0082-00

*

0

2-14

Mechanical Parts

List—

SC 501

FIGURE

1

EXPLODED (CONT)

Fig. &

Index

Tektronix

Seriol/Model

No. Mfr

No.

Port

No. Eff Dscont

1 I 3 4 s

Nome &

Description

Code

Mfr Port Number

X-47

214-1061-00

1

SPRING

,

GROUND

:

FLAT 80009

214-1061-00

-48

426-1022-00

1 FR SECT, TOP: 80009

426-1022-00

(ATTACHING PARTS)

-49

213-0146-00

1 SCR,TPG,THD FOR:6-20

X

0.313 INCH,PNH

STL

83385

OBD

-50

426-1047-00

1 FR SECT, BOTTOM: 80009

426-1047-00

(ATTACHING

PARTS)

213-0146-00

1

SCR,TPG,THD

FOR:6-20 X 0.313 INCH,PNH STL 83385

OBD

-51

337-1839-00

1 SHIELD, ELEC:HI VOLT, RIGHT

80009

337-1839-00

(ATTACHING

PARTS)

-52

211-0008-00

1

SCREW,

MACHINK:

4

-40

X

0.25 INCH,PNH

STL 83385

OBD

-S3 210-0994-00

1

WASHER,

FLAT:0. 125 ID

X

0.25"

OD,STL

83385

OBD

-54

337-1842-00

1

SHIELD,

ELEC:HIVOLT, LEFT 80009

337-1842-00

(ATTACHING PARTS)

-55

211-0144-00

1

SCREW,MACHINE:4-40

X 01.312 INCH L,PNH STL

83385

OBD

-56

210-0994-00

1 WASHER,FLAT: 0.125

ID X

0.25"

OD,STL

83385 OBD

-57

361-0581-00

1

SPACER, SLEEVE:

0.25 OD

X

1.044 INCH

LONG

80009

361-0581-00

-58

129-0419-00

1

POST,ELEMCH: 80009

129-0419-00

-59

1

CRT

BOARD

ASSY:

(SEE A1 EPL)

-

.

CRT BOARD

ASSY

INCLUDES:

-60

131-0608-00

8

.

CONTACT,

ELEC: 0.365 INCH LONG

22526

47357

-61

136-0252-04

15

.

SOCRET,PIN CONN:0.188

INCH

LONG

22526

75060-001

-62

136-0260-02

1 . SOCRET,SEMICOND:16

CONTACT, LOW

CLEARANCE

01295 C931602

-63

214-0579-00

1

.

TERM.,

TEST PT:0.40 INCH LONG

80009

214-0579-00

-64

214-0973-00

1 .

HEAT

SINR,ELEC:

0.28 X 0.18

OVAL X 0.187"H

80009

214-0973-00

-65

260-0723-00

1 .

SWITCH,

SLIDE :DPDT,0.5A,

12

5VAC

80009

260-0723-00

-66

260-1332-00

1

.

SWITCH,

PUSH :1 BUTTON

71590

2RAB010010-XXX

-67

361-0542-00

2

.

SPACER,

SWITCH -.PLASTIC

71590

J-64281

-68

337-1838-00

1 . SHIELD, ELEC:

PUSHBUTTON

80009

337-1838-00

-69

260-1445-00

1 . SWITCH,

POSH:

80009

260-1445-00

361-0542-00

2

. SPACER, SWITCH:

PLASTIC

71590 J-64281

-70

260-1365-00

2

. SWITCH,

PUSH:

80009

260-1365-00

-71

337-1837-00

1

.

SHIELD,

ELEC: PUSHBUTTON

80009

337-1837-00

-72

376-0051-01

4

.

CPLG,

SHAFT,FLEX: FOR 0.125 INCH

80009

376-0051-01

-

.

.

COUPLING,

SHAFT,FLEXIBLE INCLUDES:

354-0251-00

2

.

.

RING, COUPLING:

80009

354-0251-00

376-0049-00

2

. .

CPLG, SHAFT,

FLEX:

PLASTIC

80009

376-0049-00

213-0048-00

4

. .

SETSCREW:4-40

X

0.125 INCH HEX

SOC STL

74445

OBD

-73

3

.

RES,VAR,NONWIR:

(SEE R405

EPL)

-74

1 .

RES,VAR,NONWIR:

(SEE R145,R275 £

R330 EPL)

(ATTACHING PARTS)

-75

210-0583-00

3 .

NOT, PLAIN, HEX.

:

0.25-32 X 0.312

INCH,BRS 73743

2X20319-402

-76

210-0046-00

3 .

WASHER,LOCR:1NTL,0.26 ID

X

0.40"

OD,STL

78189

1214-05-00-0541C

-77

337-1840-00

1 .

SHIELD, ELEC: POT

MTG

80009

337-1840-00

-78

1 CRT BOARD ASSY: (SEE A2 EPL)

-

.

CRT BOARD ASSY

INCLUDES:

-79

136-0252-04

6 . SOCRET,PIN CONN:

0.188

INCH LONG

22526

75060-001

-80

136-0514-00

1 . SOCRET,SEMICOND:MICROCIRCUIT,8

CONTACT

82647

C930802

(ATTACHING PARTS)

-81

210-0406-00

1

NOT, PLAIN,HEX.

-.4-40

X

0.188 INCH,BRS

73743 2X12161-402

-82

211-0144-00

1

SCREW,MACHINE:4-40

X 1.312 INCH

L,PNH STL

83385

OBD

-83

213-0336-00

1 SCR,TPG,THD FOR:6-32

X

1.25 INCH.PNH STL

83385

OBD

-84

361-0671-00

2

SPACER, SLEEVE:

0.18 9 OD jC 1.06

INCH

LONG 80009

361-0671-00

2-15

®

SERVICES

AVAILABLE

d. Set

the following controls on

the

SC

501

.

Tektronix, Inc.,

provides complete

instrument repair

and

calibration at

local

Field Service Centers and at the

Factory

Service Center.

Contact

your local Tektronix

Field

Office

or

representative

for further

information.

NOTE

The test

equipment

end accessories required

for

complete calibration

of

the

SC 501

are listed

under

Test

Equipment

Required.

Do

not proceed

with

VERTICAL

or HORIZONTAL

adjustments

unless

the

checks

and

procedures

for

the POWE

R

SUPPL

Y

& CRT

ADJUSTMENTS

have

been performed. The

performance of

this instrument

can

be

checked at

any

temperature

within the

0°C

to +S0°C

range.

Make

any adjustment at a

temperature

of

+26^

C,

±5°C,

WARNING

Dangerous

potentials exist at

several points through-

out

this

instrument.

When the instrument is

operated

with

the covers

removed, do not touch

exposed

connections or

components. Disconnect

power before

cleaning

the instrument

or

replacing

parts.

PRELIMINARY

PROCEDURE

a. Check

that correct

nominal line selector block ha:

been

installed on the

line selector pins on the

Powe

Module

and that

the regulating range selected

includes th<

input

line voltage. See

Installation section of

Power Modul«

instruction

manual.

b. Remove

the

SC 501

side

covers and connect

th(

SC

501 to the

Power Module using

the

plug-in extender.

c. Connect

the Power Module to the

variable autotrans

former and

autotransformer

to

input line

voltage.

Se

autotransformer

to

nominal line voltage and apply

power t<

the

SC

501 .

INTENSITY

FOCUS

POSITION

(Vertical)

POSITION

(Horizontal)

VARIABLE

(Vertical)

VARIABLE

(Time

base)

LEVEL/SLOPE

Trigger Source

Pushbuttons

Fully counterclockwise

(ccw).

Midrange

Midrange
Midrange

Fully

clockwise

(c>w)

(XI)

Fully

clockwise

(ow) (XI)

AUTO

(Centered

and

pulled

OUT)

INT

ALL OUT,

except

ushed

in.

POWER

SUPPLY & CRT

1

.

Power

Supply Checks

Connect

the

precision

dc

voltmetf

between each

voltage

test point an

ground. Check;

that each supply

^withi

the tolerance liisted below.

Supply

Tolerance

+20

V

+

19.9

V to

+30.1

V

-20

V

-19.6

V to

-20.4

V

+8

V

+7.9

V

to +8.5

V

-8

V

-7.8

V to

-8.6

V

+65

V

+60

V

to +70

V

-980

V

-950 V to -1010 V

2.

+20

V

Adjustment

R500

Connect

the nrecision

dc

yoltmett

between the

+20

V

test

point

an

ground. Adjusit R500 (+20 V

ADJ)

for

reading of exactly +20 volts.

3.

Regulation

With the

dc

voltmeter on the

—980

'

test

point, adjust Variable

Autotran:

former

output

voltage from

the

low

limi

to

the

high Himit

as

indicated

in

th

Power Module: instruction manual.

Te:

point

reading should

not

vary

more

tha

±10

V- Return

Variable

Autotransforme

to

nominal line voltage

setting.

4. CRT Bias

Adjustment

R425

With the INTENSITY

control

se

fully ccw and! no test

equipment

cor

nected

to the SC 501

,

adjust

R42

(Bias!

until trace just disappears.

If

trac

is

rrot

visible^

adjust R425

until

trac

appears and readjust

R425

urjtil

trac

just

disappears

5.

Trace Rotation

Adjustment R415

Adjust INTENSITY

cw

for

visible

trace,

FOCUS

for best

trace,

horizontal

position for

centered trace.

Adjust R415

for

straight line

trace. Adjust

vertical

position control to

set trace top

to

bottom of

graticule.

It

may be

necessary

to

readjust

R415

so

that

trace

will

be

a

best

straight line

compromise

at

any

vertical position.

VERTICAL

SYSTEM

NOTE

Refer

to

POWER

SUPPLY &

CRT

(steps

1-5) before

performing any

vertical

system

adjustments. Be

certain that

the

power

supply and

crt voltages

are

within

their listed

tolerance and

that

all

controls on

the

SC 601 have

been sat

to

their

preliminary settings.

6.

Vertical

Balance R142

Set vertical

deflection factor to

10

mV/div,

AC

COUPL in,

and

center

the trace

with POSITION

controls.

No

input

signal applied. Rotate

vertical

VARIABLE from XI

to

X10

and note

the position of the trace at X10

setting.

Return vertical VARIABLE

to XI

position.

Adjust R142

(Bal)

to set

trace

to same

position

as

the

VARIABLE

X10

setting.

Repeat the above

procedure

until there

is

one-half minor division or

less of

trace

shift when rotating

vertical

VARIABLE over

its

entire

range. Reset

vertical

VARIABLE to XI position.

FIEV.

B.

AUG

1974

CALIBRATION

ADJUSTMENTS

7.

Trigger Balance R186

Attach

probe of test oscilloscope to

junction

of

R200,

C200

and connection

to

trigger selector

switch.

Using

the

test

oscilloscope as a

dc voltmeter,

adjust

R186

for

a

reading of +50

mV. Apply

a

50 mV,

1 kHz

square wave from the

Amplitude Calibrator to the VERT

IN-

PUT

connector of the

SC 501 . Measure

the peak-to-peak

amplitude.

Displayed

signal

on

the test oscilloscope should

be

a

square wave

with

a peak-to-peak

am-

plitude not less than

2.8

volts nor

more

than 4.2

volts.

Remove test oscilloscope

probe

from

SC

501

.

8.

Vertical

Gain

(XI) and vertical

VARIABLE range

(X10)

With 50 mV square

wave still applied,

adjust

SC 501

LEVEL/SLOPE control

for

stable display.

Set vertical

VARIABLE to

XI

and

adjust

R172

(Vert Gain) for

a

display

amplitude of

exactly

5

major divisions.

Set vertical

VARIABLE to

X10. Apply

500 mV

square

wave

from

Amplitude

Calibrator.

Adjust

R132 (X10 Cal) for

a

display

amplitude

of exactly

5 major divisions.

Remove Amplitude

Calibrator signal.

Set

vertical

VARIABLE to XI.

9.

Normalize

(10 mV/div) input time

constant

Attach Input

Normalizer

(47 pF) to

VERT INPUT connector.

Set SC 501

controls to 10

mV/div, vertical

VAR-

IABLE to

XI. Apply

100 mV,

1kHz

square wave from

Amplitude Calibrator

to

Input Normalizer.

Adjust

Cl 17

for

best displayed

square wave

(flat

top and

square

corners)

on

SC

501

crt.

Remove

Input Normalizer from

circuit.

10.

Normalize

(100 mV/div)

input

time

constant

Set

SC

501

to

lOOmV/div.

Apply

500 mV, 1 kHz

square wave

from

Ampli-

tude Calibrator

directly

to

VERT

INPUT

of

SC

501

.

Check

for

displayed

ampli-

tude

of 4.85

to

5.15 major

divisions.

Adjust

Cl

12 for

best dispiayed

square

wave. Insert

Input

Normalizer

between

VERT INPUT

connector

and

Amplitude

Calibrator.

Apply

1

V, 1 kHz

square

wave

to Input

Normalizer.

Adjust

Cl

10

for

best displayed

square

wave.

Remove

Input

Normalizer

from circuit.

11.

Normalize

(1

V/div)

input time

constant

Set SC 501

controls

to 1 V/div.

Apply

5

V, 1 kHz

square wave from

Amplitude

Calibrator directly

to

VERT

INPUT connector.

Check for displayed

amplitude

of 4.85

to 5.15 major

divisions.

Adjust

C104

for

best displayed

square

wave. Insert

Input Normalizer

between

VERT INPUT connector

and

Amplitude

Calibrator.

Apply

10 V,

1 kHz

square wave

to Input Normalizer.

Adjust 0102 for

best displayed

square

wave.

Remove Input Normalizer

from

circuit.

Set

SC 501

controls

to

10 mV/div;

dc coupled (all vertical

push-

buttons

OIJT).

12.

Check vertical

bandwidth

Terminate

VERT

INPUT connector

of

SC

501

with

50-ohm

termination.

Set all

SC

501 vertical

pushbuttons

to

OUT

position

(lOmV/div;

decoupled).

a.

Apply

50

kHz

reference

signal

frequency

from Leveled

Sine-Wave

Gen-

erator to 50-ohm termination

and adjust

output for

a

displayed

amplitude of

6.0

major divisions. Set Leveled

Sine-

Wave

Generator frequency

to

5

MHz.

Displayed amplitude

must be

greater

than

4.2 major divisions.

b.

Repeat step

12a

with

SC

501

set

for

100

mV/div.

c.

Repeat step

12a

with

SC 501 set

for

1 V/div. Use

5.0

major divisions

of

displayed amplitude

at the

50

kHz refer-

ence frequency. Displayed amplitude

at

5

MHz must

be

greater than

3.5 major

divisions.

HORIZONTAL

SYSTEM

NOTE

Refer

to POWER SUPPLY

8< CRT

(steps 1-5) befor performing

any

horizontal

system adjustments.

Be

certain

that the power supply and

crt voltages are within their

listed

tolerance and

that

all

controls on

the

SC 501

have

been

set to their

preliminary

settings.

13.

Check Time/div accuracy

Apply appropriate

time

marks from

Time-Mark Generator to

VERT INPUT

connector

on

SC 501

.

Adjust

SC 501

controls

so

that second marker

is

on the

second vertical

graticule line. Check for

proper

timing

over the

.

center eight

division portion of

the

sweep

for each

Time/div setting.

Disregard the first

0.5

microsecond

of total sweep length.

Time

SC

501

Marks Time/div

1 ms 1 ms/div

10 ms 10 ms/div

100 ms 100 ms/div

1ms 1

Ms/div

10

ms

10

Ms/div

100

ms

100

MS/div

Tolerance

The second

through tenth

time

marks dis-

played

for

each

Time/div setting
must be

aligned

with its associated

vertical graticule

line

within ±2

minor

divisions

(5%

of eight

divisions).

14.

Check

X5

Magnification

Apply

500 microsecond markers

to

SC 501

at 1 ms/div. Pull time

base

VARIABLE control

out (X5). Five-

division

spacing

between two time marks

indicates

X5 magnification. Push time

base

VARIABLE

in

and set to

XI

position.

15.

Check time base

VARIABLE range

Apply

10

millisecond

time marks to

SC

501

at 1 ms/div.

Set

time

base VAR-

IABLE to X10

position.

One time mark

per

division indicates

a

10:1 range.

Re-

turn time

base VARIABLE

to XI

position.

16.

Adjust

basic timirrg

Apply one millisecond time marks

to

SC 501

at 1 ms/div.

Adjust

R265

(Hor-

izontal

Gain

XI)

on Auxiliary board for

nine’

divisions of horizontal deflection.

Adjust

R212

(Sweep

Adj) to

display

a

total of eleven time marks.

Readjust

R265

for

one time mark per major

division on the

SC 501 .

of

two time marks per

five major

divisions. Position

display horizontally

from full left

to

full

right. Signal lin-

earity

must

remain

within

±2

minor

divisions. Return horizontal

POSITION

control

to

midrange.

Push time

base

VARIABLE control in and

set to

XI

position.

18. Adjust

time

base VARIABLE range

Apply 10 millisecond time marks

to

SC

501

at 1 ms/div. Set time base

VAR-

IABLE to

’XIO position.

Adjust

R226

(Sweep XIO Cal) for

a

display of one

time mark per

major

division

on the

SC 501

.

Return time

base VARIABLE

to X

1

position.

19.

Check Trigger functions

Connect

time marker output from

the Time-Mark Generator to VERT IN-

PUT

of

SC

501 and

trigger

output

from

Time-Mark Generator to EXT

TRIG

pin

jack of

SC

501

. Set

SC

501

trigger

source to EXT

arid triggering

mode to

AUTO. Set SC

501 time

base

for

1

ms/div.

Set

time marks and triggers

from Time-Mark Generator for 1 milli-

second.

Adjust LEVEL/SLOPE

control

for

a

stable display on

SC

501 Keeping

marker

output

of Time-Mark Generator

at 1

millisecond: select in sequence,

10

millisecond, 0.1 second, and

1

second

triggers from Time-Mark Generator.

SC

501 display should not

be

stable for

1

second triggers in

AUTO

mode. Push

LEVEL/SLOPE

control in and check for

a

stable display with

1

second triggers.

Adjustment of LEVEL/SLOPE

control

may be

necessary.

20.

Check

+

Gate

Out

Set SC 501

time

base

for

1

ms/div.

LEVEL/SLOPE

out (AUTO). Trigger

source to INT. No

signals applied. Using

test

oscilloscope, check

+

Gate Out

for

a

10

millisecond rectangular pulse. Ampli-

tude

limits:

7.7

volts

to 8.7

volts.

21.

Adjust Ramp

Out

With

SC

501

controls

set

the same

as

for step

8,

attach probe

of

test

oscillo-

scope to

pin

15B

at

rear

interface

con-

nector. Using

test oscilloscope

as a

volt-

meter adjust

R245 (Ramp

Gain)

for

a

10 V

peak-to-peak signal. Adjust R235

(Ramp Zero)

for signal level to start at

a

zero volt

dc

level.

22.

Adjust

External

Gain

Set

SC

501

Ext Horiz (X-Y) selector

switch,

S230,

toward

rear of instrument.

Adjust INTENSITY

for visible

dot on

crt

of

SC 501 .

Position

dot

to first vertical

line on left side of screen and centered

vertically. Apply

a

1 V,

1 kHz

square

wave

from Amplitude

Calibrator to

EXT

HORIZ

pin jack on

SC

501

.

Adjust

R300

(Ext Gain)

for

10 major

divisions

of horizontal

deflection

(lOOmV/div).

NOTE

AFTER

COMPLETION

OF STEPS

16THROUGH

18,

REPEAT

STEPS

13

THROUGH

15,

MANUAL CHANGE

INFORMATION

TEKTRONIX®

to

t0ChnicMt

CHANGE:

PRODUCT

EFF SN

B040250-UP

CHANGE

REFERENCE

DATE

9-10-74

DESCRIPTION

M22,921

ELECTRICAL PARTS

LIST

AND

SCHEMATIC

CHANGES

CHANGE- TO:

R165

308-0349-00

RES.,FXD,WW:3.6K

OHM,

1%,

3W

R167

322-0205-00

RES.,FXD

Fim:1.33K OHM,

U,

0.25W

R176

322-0205-00

RES.,FXD,FI1M:1.33K OHM,

17.,

0.25W

R178

308-0349-00

RES.,FXD,WW:3.6K

OHM,

17.,

3 W

PAGE

1

OF

1

TEKTROryiX®

committed to

technical excellence

MANUAL CHANGE INFORMATION

PRODUCT

SC

501

CHANGE

REFERENCE

Cl/1074

DATE

10-8-74

CHANGE:

DESCRIPTION

070-1700-00

CALIBRATION ADJUSTMENTS

Step 21

Adjust

Ramp Out

CHANGE TO READ:

With

SC 501 controls set

the

same as for

step

8,

attach

probe of test oscilloscope

to

pin

15A

at rear interface

DIAGRAM

INPUT & VERT AMP

C120

sh

’

’ be

0.01

pF

PAGE

1

OF

1

MANUAL

CHANGE

INFORMATION

TEKTHOIMIX’

sr SOI

PRODUCT

CHANGE

REFERENCE

C2/1-75

PH

to

lochnicsl

oxceltenco

1

'

070-1700-00

DATE

1-7-75

CHANGE:

DESCRIPTION

CALIBRATION

ADJUSTMENTS

Step

10

CllANCi;: AJiust C112 to

read:

"Adjust

C104”

CllANCn:;

Adjust

CllO to

read:

"Adjust

C102"

Step 11

CHANGE:

Adjust

C104

to

read:

"Adjust

Cl

12"

CHANGE;

Adjust

C102 to

read:

"Adjust

CllO"

INTERCHANGE: Circuit Board

Step

(circled) Notations

10

and

11,

PAGE

1

OF

1

MANUAL

CHANGE INFORMATION

PRODUCT

_S_C

5Q1

EFF

SN

B050560-U-

CHANGE

REFERENCE

^^3,539

DATE

7-17-75

CHANGE:

DESCRIPTION

070-1700-00

ELECTRICAL

PARTS LIST

AND SCHEMATIC

CHANGES

CHANGE

TO:

A1

670-3304-02

CKT

BOARD

ASSY:MAIN

C154

281-0637-00

CAP.

,FXD,CER DI:91

PF,

5%,

500V

(C154

is

located

on

diagram

1

INPUT &

VERT AMP)

PAGE OF

IMPUT

COUPLIUG,

ATTEKJUATOR.

XI XIO

XlOO

VER.-TIC.AI_

PR-EeaMP

QI20>

<5125

QI

|^5

EMITTER

FOU-OWERS

Ql

4

a

<au.o

^

VERTICAL

OUTPUT

Qiao (3IUT

QlS8 Q|T<0

QK«4 QI7S

VARIA&UE

TRIGiCiER

AMPUIPIEP.

G5184

ai40

!

MULTIPLIER

5270

I

S2 2&

RAMP

amplifier.

Q

240

0250

*KT

9X00

I

i.Eveu/si.ope

SOUR.ce

FOL. LOWER-

SV^EEP

GENERATOR

HORIZONTAL

amplifier

Q2SZ

Q28E

Q.Z10

Q

2HO

Z AXIS

amplifier

asiE.

Gisau

GiaRO

QS

4

E

as

4

S

MI<^H

VOLTA<^E

SUPPLIES

Q

850

SlSTO

Q.3C>0

Q3SO

S134E.

T3SO

+

L5 VOUX5

PIN

A

CRT

SEXTUPLER

—

P«0

VOL-fS

EXT

HORIZ.

E XTERNAL

HORIZONTi^L

AMPLIFIER

aaos

U

3

IO

|ikixen'»itY

LOW

VOLTAIRE

SUPPLIES

GJSOO

QEtO

as20

0525

ZO VOLTS

8.Z VOLTS

QSSO 053

S

S.2

VOLTS

GtS-AO

SS4

S

*0

VOLTS

Block. Diag^ram

ozta

Servicing

Information-

SC

501

INPUT

AND

VERTICAL

AMPLIFIER

CIRCUIT

DESCRIPTION

Input

Attenuator.

The input attenuators

allow

a

choice

of

either XI.

X10,

or X100

attenuation

of the input

signal,

which

is ac- or

dc-coupled

by

the

selected

position of SI 00.

C112

and

C104

allow the

XIO

and

X100

attenuation

networks to

be

frequency compensated. C117,

C110,

and

Cl 02

allow the

attenuation

networks

to

be normalized

for

a

time

constant

of

47 microseconds.

Preamplifier. The

preamplifier stage

employs a

dual field

effect

transistor.

Q120,

to

provide

a

high input

impedance.

Q120B

acts as a

constant-current source

for

Q120A.

Q125

and Q135

circuitry

operates as a

paraphase

amplifier. Q148

and

Q160

operate as

emitter-followers to

provide a

low-

impredance drive to

the

following stages.

Quiescently,

the

two

sides of the

paraphase

amplifier are

balanced

by

the

adjustment of R142 so

that there is no

current

through

the

gain-setting

resistor, R129,

when

the VARIABLE

control

is

fully

clockwise.

The input stages

are

diode clampred by

CR121

and

CR125,

protecting

the input stages

against

negative-going

over-drive

signals.

R130

(VARIABLE

con-

trol)

provides an adjustable

attenuation

factor other than

the

fixed

calibrated values set by

the input attenuators

and

the XI

position

of

R130.

Output

Amplifier. A

push-pull

signal is developed

at

the

emitters of Q148

and

Q160,

along

with

a

dc positioning

voltage

from R145

(vertical POSITION

control). The

gain

of

the

push-pull

amplifier,

consisting

of

0150, 0158,

0167,

and

0176,

is controlled by

Gain

adjustment R172.

The

output

stage, 0165

and

0178,

with their associated

components

is

a

balanced

grounded-base

amplifier

circuit

which is

protected

from over-drive

signals

by

clamping

diodes, CR165

and

CR178.

Trigger Takeoff.

The

trigger takeoff

amplifier,

0184

and

0190,

with their

associated

components,

develops the

internal

signal

to

trigger

the

sweep

generator. The

gain of

this

stage is about

seven.

Servicing

Information— SC

501

SWEEP

AND

HORIZONTAL AMP CIRCUIT DESCRIPTION

Trigger. Integrated circuit

U200

is a

combination

Trigger/Sweep Generator.

The Trigger

portion (input pin

13)

derives

trigger pulses

from

a

sample of the Vertical

Amplifier signal, or

from

an

external signal

applied

to

the

EXT

TRIG

pin jack. CR200 and CR201

limit the amplitude

swing

of

the trigger

signals.

C204

is the

differentiating

capacitor

for

the

trigger pulses. LEVEL/SLOPE control is

provided

by a

voltage

applied

to

pin 14 from R210. No

trigger signals can start

the sweep

generator system until

sweep

hold-off period has been

completed. The sweep

hold-off

F>eriods

(pin

3)

are

determined by the RC time

constants of

R215, C218,

and

C220.

The

timing period for

the

AUTO

triggering mode is

determined

by

the

time

constant

of R205 and C205

if

no

voltage is

applied

to

pin

10

through

S205.

For

normal

triggering,

approximately

—6

V

is

applied

to

pin 10 through S205.

Sweep

Generator. The Sweep

Generator

portion

of

U200

produces two output

signals; the sweep ramp voltage

on pin

4 and

crt

unblanking gate on

pin 16.

The

sweep is

generated

by

a feedback

operational

amplifier integrating

circuit. The slope of the ramp

is controlled by

fixed

RC

time

constants selected

by

the Tlme/div

pushbuttons.

CR215

provides

a

low

impedance discharge path

for

the

sweep

capacitors. Sweep

length is

controlled

by a

voltage

applied

to

pin

6

from R212

(Sweep Adjust).

Sweep

VARIABLE

control, R225,

controls

the charging

current

to

the

sweep

(integrating)

capacitors

and when

varied changes

the slope of the ramp at

pin 4.

Horizontal Amplifier.

Sweep

ramp voltages

or

signals

from the

EXT HORIZ pin jack

are applied

to the base of

Q252.

The circuit containing

Q252 and

Q270 is

an

emitter-coupled paraphase

amplifier

with

a

horizontal

POSITION

control voltage applied

to

the

base of

0270

and

R275.

In

the

magnified

mode,

emitter degeneration is

reduced, resulting in

a X5

increase

in

gain.

Clamping diodes,

CR280

and

CR282

limit

the positive

excursions of the

signals

at the bases

of

Q285

and

0290 to about

—3

V as set

by

Zener diode,

VR280.

Push-pull signals

are developed

at

the collectors of

Q285

and

0290 to drive the horizontal

deflection plates of the crt.

Ramp Out. The

Ramp

Out

feedback

amplifier circuit,

0240 and

0250,

produces

a

zero

to

-HO

V

ramp or an

amplified and

inverted version of signals from the EXT

HORIZ

pin jack to

the rear connector pins.

The feedback

arrangement

allows the

emitter of

0250 to

be

set

to a

zero

volt dc

level, and produces a

low

output

impedance without

causing 0240 to go

into saturation.

External Horizontal Amplifier.

The External Horizontal

Amplifier circuit is an operational amplifier configuration,

U310,

fed

by

buffer amplifier

0305.

The gain

of U310 is

fixed

at about

six

by

R310 and R305.

R300

controls the

external

signal amplitude

to

the

gate of

O305A.

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OUT

XI

1

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Servicing

Information—SC 501

Z-AXIS

AND CRT

CIRCUIT

DESCRIPTION

Z-Axis

Amplifier

and

+

Gate Out.

The Z-axis amplifier is

a

shunt-feedback

operational

amplifier with

a

voltage

output.

The

amplifier consists of

Q336, Q348,

and Q345.

The

feedback path is

from the collectors

of

Q345-Q348

through C339-R339

to

the

summing point at the base of

Q336.

Q345 and Q348

are connected as

a

complementary

amplifier to provide a

fast

risetime signal

while

consuming

minimum

quiescent power. Q345 acts as a

pull-up

transistor

and

Q348

acts

as

the

pull-down transistor for the amplifier.

The

output voltage

from the

amplifier provides

the

drive

signal

to

control the

crt intensity

level

through the

control-grid supply.

Emitter-follower

Q315,

acts as

a

buffer

amplifier

for the

Z-axis

amplifier

and

+

Gate Out

circuits.

The negative-going

unblanking gate

at

the

emitter

of Q315

is

coupled

through

CR334 to

the Z-axis

amplifier.

The

current through

CR334

is set

by

R330,

INTENSITY control.

When R330

is set to

+20

V,

CR334

is cut

off and the

crt is

blanked.

Cathode-Ray

Tube

Circuit.

A

repetitive, sinusoidal

signal

is

produced

by a

regenerative feedback oscillator in the

primary

of

T380

and

induced

into

the secondary. Current

drive for

the

primary

winding

is

furnished

by

Q380,

whose

conduction

is controlled

by

the voltage

difference between

its base

and emitter. The secondary

winding

of

T380

develops

about 350

volts peak-to-peak. The sextupler rec-

tifier

circuit (six

diodes in series) produces about

—980

V

dc at

the

crt

directly-heated cathode

(filament).

A

separate

transformer tap

and

rectifier

circuit,

CR382,

in

the

second-

ary

of

T380 produces

about

-t70

V

dc

for the vertical,

horizontal, and Z-axis

amplifiers.

The 350

volts

peak-to-peak

output

of

T380 is also

applied to CR415 and

CR416

to

provide the rectified

negative potential for the crt control

grid. CR420

limits

the

positive swing with respect to the

-t

dc

reference level

set by

Bias

adjustment

R425. CR418 limits the negative swing

with respect to the output voltage level of the

Z-axis

amplifier.

R410

connects the

crt

grid voltage

to

the crt

filament (cathode)

to

ensure

that the crt grid is

more

negative than —980

V

(crt is

cut

off).

A

positive-going

unblanking gate from the Z-axis amplifier

decreases crt bias

and

intensifies the

trace.

High voltage

regulation is accomplished

by

sampling the

—980

V

across

a

voltage

divider

returned

to

-t-20

V

(five

1

resistors

in series with

R362). A quiescent

level

of

zero

volts is established

at

the

base of

Q365,

a

Darlington

amplifier.

If

the

output

level

of the nominal —980

V goes

more

negative,

the

output

level of

Q365

goes

more

positive,

reducing the

conduction of

Q370 and

Q380.

The

result is a

lower

peak-to-F>eak

amplitude

induced in the

secondary of

T380.

Conversely, if

the

—980

V goes

more

positive,

Q380

will conduct harder

and

a

larger

peak-to-peak voltage

appears across the secondary of

T380.

C367

limits

the

regulator bandwidth

to

prevent

oscillations.

Q360

and

Q350,

and

associated components, is

a

high

voltage

shut-down circuit.

If

the

-t70

V or

—980

V supplies

increase above the amplitude regulation

limits, Q360

will

turn on, reducing the voltage difference between the

base

and

emitter of

Q380 to

near zero

and removes

the

current

drive

to

the primary

of

T380.

sc

5.01

REV-

6,

AUC

Z

Axis

and CRT

Cir-cuit

OKM

0174

Servicing

Information—

SC

501

LOW

VOLTAGE

SUPPLY

CIRCUIT

DESCRIPTION

The

+20

V

supply

provides power to

operate

the

SC

501

and

also

establishes

the

reference supply for

all

other

power

supplies,

including the crt

system. An error-

sensing

circuit,

Q500,

compares

a

sample of

the

+20

V

across

a

voltage

divider (R507-R506-R504)

with a

reference

voltage

established by

Zener diode,

VR500. Any

voltage

difference (or

change)

between

the base

and

emitter

of

Q500

is

amplified

by

Q500

and

applied to

the base of

Q510.

This

results in Q510

controlling (or regulating) the

conduction

of the

PNP

series-pass transistor

(located

in the

mainframe)

to

correct

for

a

change in the

+20

V

supply.

R500 (+20 V

Adjust)

sets

the quiescent

level at the base

of

Q500. R506

provides current

limiting for

Q500

in case

Q510

fails.

C505

prevents regulator

oscillations. Boot-

strapped

emitter-followers,

Q520

and

Q525

regulate the

+8.2

V supply in a

manner

similar

to

the

operation of

the

+20

V

regulator.

The

—20

V

and

—8.2

V

supplies are

regulated in

a

manner

similar

to

the

+20

V

and

+8.2

V

supplies,

except

that Q545

controls the conduction of

the NPN

series-pass

transistor located in the

mainframe. The

reference voltage

for the error-sensing circuit,

Q540,

is established by

CR540.