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OPERATING INSTRUCTIONS FOR

SWEEP CIRCUIT ANALYZER

THE

MODEL

SS137

trouble shoot

AII tests
portant
only to have them break down in the circuit with

The

are

since

SWEEP CIRCUIT ANALYZER

SS137

TVsweep, sync, and high

made dynamically - that is, with the TV

many out-of-circuit tests wili indicate

voltage circuits

is expressly designed to help

faster and

set turned on.

sweep components

operating

potentials

more

applied.

profitably.

This is

are

you

im-

good,

Fig. 1. Blockdiagram shows

Fig.

Asseen in

a TV receiver.

of

"toughdog",

of the

tal sweep

you

tion,

pin-point

to
another.
output

sortof

of the

circuits

deflection

stituting

troubles

your

lose

there is so

For example, insufficient
tube,
trouble to thefaulty

To

checks

contain
a

indicating

the trouble

flyback

familiarize

that can be

yoke.

lorown-good,

1, the

Historically, however, they

time-consuming troubles. One

areso

difficuit totrace is that

much interaction

a driving oscillator, output

Both

device, and are
to a
yoke.

or

stage,

WHAT WILL THE

yourself

made

TVoscillators

variable-output

and

sync

sweep

specific section

The SS137

sweep circuits comprise

and

sync circuits comprise

figuratively

inthe

sweep

width can

and many

with what
with it. Both the

assists

the

can be

oscillator.

have represented neariy

the main reasons

of
thehigh voltage is often

working in the

circuit that itbecomes

or stage - one trouble

becaused by

you

even

times,

SS137

SS137

TV horizontal

stage,

checked

thehorizontai

quickly

in

thedefective

to

rc?

does, let's take

an

output transformer,

with

the SS137

roughly 50/oof

approximately

dark. In

often

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and verticai

by

80

why

horizon-

lost; thus

very

looks like
oscillator,
down" this

component.

a iook

directly

percent

difficult

at

sweep

TV.

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Dynamic

Tests

Horizontal and
Horizontal deflection
Flyback
Vertical
Vertical

Meter Ranges
Internal: 0-300

5@, 70o,
External:

with

vDC,

peak,

0-1,000

Physical

-

Height

-

Width
Depth
Weight

Vacuum Tube Complement
V1 - 6BN8

v2
Special Features
Large

Distortion free
ments.
All

I0 inches

-

-

-

6CS7

storage compartment.

Steel case.

vertical

transformer

transformer
yoke

drive

volts

1l0o

90o,

0-3 MA DC,

external

peak

V

Specifications

L/2

9

inches

"

4

lbs.

9

mirror

oscillator

yoke
check,

drive

signal

peak

and

0-300

probe,

to

in detachable

substitute

substitute

monitored

signal

peak,

to

COLOR, for flyback

MA

DC, 0-3

0-30,000

peak.

meter

on

for

monitoring

vDC,

vDC, with

cover, for

transiormer

viewing

substitute

0-300

vDC, 0-1000

external probe,

picture

check.

while

oscillator

vDC,

0-300

making adjust-

signals;

0-10,000

peak

v

to

Before starting

yourself

iarize

The
multitude
these functions
For

example,
oulpuL
tube

in the TV and

addition,

In
changes above,

SSl37

of external

of the horizontal

the

Let's

see what

with

the unit

provides

meter

are

used

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the

the

horizontal

by merely

CONTROLS

to use

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and

its

a

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ranges

simultaneously

coil

in

oscillator

TV high

controls

the

voltage

output

pushing

we

ON

you

SS137,

controls.

horizontal yoke,

for

measuring

in an average

SS137

in the

SS137

can

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the

transformer

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to

THE

SSI37

can

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voltages

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can

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perform

be

can

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test

these

time

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on the

button.

checks.

you

if

completely

four

test

and

cuttenG.

shooting

for

tne

the horizonial

SSl37
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famil-

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same inductance
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dication.

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to develop

SS137 is

degrees

connected, and

the

the flybackrransformer

width

in the

test

switch is

angle

such

or

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HORZ

power

raster

power

picture

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that

above

with

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as

the TV

switch and

from

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width,

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instead

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tube.

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a

if

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set

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a

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course

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to the

if it

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is read

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flyback

is

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is adjustable

done

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do

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the

on

on the

degree

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HORIZ

that would

when

so

across

yoke,

a

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SS137

tube

so that

when

meter

the meter

while

panel

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normally

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dynamic

maximum

the

in

terms

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merer

in

be

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VERT TRANS

from

the VERT
These are
signal is
SAFTY SHOULD
drive

signal is a low
duce full
good.

EXTERNAL METER

anywherein
Nine

ranges

MA

0-3

300

MA

0-

0-3V DC

0-300V

0-1000V
0-300V

ages
circuits.

DRIVE and

Vertical

raster

The EXTERNAL

DC

horizontal
CHASSIS
AND

-

sistor and

DC - used

tube

DC

peak

transformer

TRANS

60

both

approximately

BE FOLLOWED

height

the TV

provided:

are

-

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same

ourpur rube.

GROUND, REMOVE

THE

TV SET

as

you

etc.

-

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peak

to

in the

DRIVE

cycle AC

350

voltage

when

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METER

set.

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for

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the

0-3MA range

must

for

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checking

and

0-1000Vpeak

horizontal

VERT YOKE

drive and

jack

and

sine wave

volts RMS;

WHEN

high

current

the

vertical

switch allows you

operates

TO PREVENT

set the

independenrlyof

control

cathode

NoTE;

AT,L

above.

regulator

B*voltage,

boost volrage,

and

vertical

DRIVE

current

to

JACKS

vertical

the

signals.

USING

signal.

output

DAMAGE

peak

yoke

VERT

EXTREME

of the HVregulator

current,

WHEN

OTHER

Some

current for a predetermined

screen

erc.

-

oscillators

drive

YOKE

DRIVE

The

vertical
CAUTION FOR

THIS

SIGNAL.

Both

signals are

transformer

to

check

rhe

resr

or sweep fuse

CHECKING

LEADS

TO THE

color

voltage

used for

checking

and

signals

and

voltages and
of the

BETWEEN THE

SST37.

TV's

on rhe horizontal

oulputs, AGC and

are

jack

respecrively.

transformer

PERSONAL

The vertical

designed

vertical

SS137

circuirry.

in

color

current

CURRENTS

have a

the

driving

built-in re-

available

drive

yoke
pro-

to

yoke

are

currents

TV's.

on the

ABovE

SS137

voltage.

ourput

volt-

sync

0-10KV
0-30KV - used

DC - used for

for

checking

setting focus

2nd

anode

voltage

volrages.

level

in

color

TV's.

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is

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same

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Notice that the
The degrees
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definite
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circuit
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circuit,
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disconnect the lead at each
meter moves up

the Horizontal

The flyback transformer

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power

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the trouble is in

to ncrmal,

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because

proceed

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FLYBACK

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(bottom)

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picture

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suitable
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indication, the flyback

of a defective flyback. A fast

shows

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stage

tothe defective

being

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circuits are functioning

other

as follows:

as described above.

TRANS test switch.

a maximum indication

obtain

is calibrated in degrees of

the test

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example,

sure the

be

tube in ttre set. Color TV

degree

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the

horizontal

plenty

located

of

color sets.

flyback

the

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deflection, the flyback

of

meter

operated

the

of this dynamic

will equal

you

if

flyback

deflection afger

defective

transformer is delivering

deflection,

transformer becomes a

is causing the trouble, make

leaky

or

oscillator connected to the

from

component in the

place

can

stage. If

should

boost

stage.

all

the tests

of

in-circuit

properly.

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on

deflection.

or surpass

are testing

sets

therefore

method

the

of

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use

the
you'vejust
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that re-

a

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checking

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flyback

completed

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set,

boost

boost

the

check

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,

(

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t

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for more

the

cause

basic
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for

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substituting the

about

than
substitute

When servicinghorizontal

types

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with

15 minutes

voke

the

SS137 remain the

yoke

SS137

at

a

to overheat.

to locatesweep

time; the higher

sweep circuits,
shown in Fig.

in color TV

4 .

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same

faster.

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sets, do not
power

you

should realize

good

A
three

leave

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in color

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vertical

on smaller

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color

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down

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yoke

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screens,

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output tube

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verriCal

SS137

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sweep is re-

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4.

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UNIVERSAL HORIZ

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secondary

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meter

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selected

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and
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the meter
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function switch
voltages

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-

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peak

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externally.

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yoke

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from

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R33

factory.

delivers. Since
of the

output in

peak

of

55.

and

5 to
YOKE

ground.

output transformer check

off coil

rectif ier

to complete

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picture

to

voltages. The

section

across

the meter

R10

to complete the

peak

to

Switch

Current Checks

substitute

40

millihenries

jack

the

-

picks

D2.

the circuit.

power
in degrees
tube in the

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Volts

peak

peak

53 has to

peak

to

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permeability-tuned

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is

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up

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to

indicates

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set shows the flyback

volts

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ground

to

circuit

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be

yoke

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a

of

uses
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test switch

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quality

the

can

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portion

A

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the

place

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shock

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red

meter

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push

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set

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test

any

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is

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or

is satisfactory.

fed

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peak

to

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1000,

have identi-

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horizontal

connected

low side

and feeds

the

output

measur-

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side

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cali-

through

peak

to

it

the

of
of

amp
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Resistors

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the
voltage ranges
10KV
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for

Peak

require readjustment unless a
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both the

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ranges.

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the SS137
the suspected circuits
the SS137
troubles - horizontal,
that

you'llfind

TV TROUBLE
No
narrow

Pix not locked Oscillator
horizontally.

Insufficient
no height.

No
vertical
meter

Here is

fali

raster

picture.

SYMPTOM

horizontal

oulput

indication.

a

analyzer.

will

sholr up

into these

it is easy to

or

or

(for

or

(no

reference,

To

speed

before using

tube

sync

categories.

three

trace

CIRCUIT

Output tube
Oscillator

Damper
HV rectifier

Yoke

Flyback

frequency;
notbe lockedin
with

setcontrol.

I-.oss

of

pulses

in the

sync controls.

Loss

of
Caused
normal AGC.

Oscillator
output tube.

Output trans­former.

Yoke.

trouble

PROBABLE

Defective
Defective

switch.
Defective

potentiometer.

TROUBLE

TV

trouble guide

your

servicing,

the SS137.

faults,

and
any

(for

sync Same

sync Check

by

shooting

too.

vertical. It
trouble that develops

SS137 TROUBLE
trouble shooting

Check
voltage, grid
Substitute
the
ing

Check B* input and
Check
normal load,
CRT
Substitute universal
for

Checkflyback transformer under
eration

Substitute

off

the

can

pulse

A
lator

preceding

separator.

points

ab- pulseattheplateof

The RF,
loss of sync

or

Substitute the
the
it

on the meter.
Check
eration
lator

Check the
ation

signal.

SS137 TROUBLE

SS137

CAUSE

6CM7.
oscillator

oulput

GUIDE

you

Note

is impossible

However,

outputtubeforcathodecurrent,

output

it

on the meter.

output of high voltage

and

check again.

return

by

oscillator from

is available.

picture

stable

circuit in the TV.

as above

the defective
thepeak

IF

oulput

output transformer under dynamic op-

by driving it with the

signal.

bydriving it with

if

it should

'Check

18

chart to

should always

However,

that

*re chart

once

in the

GUIDE

TV troubles)

SS137

voltage and

the

known-good

from 2-250

then remove the HV lead

of high voltage.

measuring

horizontal

S5137

indicates a defective

but

stages

The return

peakamplitude

to

and

video stages

pulses.

known-good

form

0-250

vertical

GUIDE

CORRECTIVE

Check and
Clean and

and

you

help

you

boost

the

try to

-

working toward the sync

stage.

theAGCkeyertube. NOTE:

yoke

give

adjust

check the tubes

you

if

lists three

all

to list

have

used

and

sweep

CHECK

grid

oscillator
P-P

volts

voltages.

horizontal

power

delivered

oscillator

last

stage where

sync

ofa stable

oscillator

volts

under dynamic

the vertical

trouble)

replace

switch contacts.

replace,

get

started using

choose

while

if necessary.

to use

general

the

variations

your

sync circuits.

drive.

while monitor-

rectifier

the oscillator

can

vertical oscil-

MEASURE

if

SS137,

screen

and

under

from

yoke.

Watch

dynamic

yoke.

to

and

a

oscil-

picture pin-

of the keying

also

cause

and

monitoring

oper-

yoke

necessary.

vary

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sync

vary

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and
inoperative.

Poor
horizontal
oscillator.

Horizontal
lator
adjusted
cycles.

No
lator
cal okay.

peak

to

both oscillators

sync

cannot

horizontal

oulput

readings

when

substitute

oscil-

be

15,750

to

oscil-

-

verti-

using

No

B*.

Defective

c6.

Defective
R25 and

Defective
hold

Defective
Defective

transformer

Defective
switch.

capacitor

control.

capacitor

resistor

horizontal

6€M7

tube.

oscillaror

T2.

oscillaror

Check
C2, andresistors

place

Check and

Check

C7.

sary.
Check

sary.

Check
Check

necessary
Clean

rectifier

any

defective

replace

values and

value and

tube,

if weak,

continuity

and

adjust

Dl,

capacitor

R3 and

item.

if necessary.

replace

replace

replace

and

replace

contacts.

Cl and

R4.

Re-

if neces-

if neces-

it.

if

No vertidal

signal.

r

yoke

Defective

potentiometer.

hold
Shorted

drive

Defective
Open

transformer

winding

SENICOF=IE.

3200

SENCORE

horizontal

capacitor

resistor

on T1.

DR|VE,

Check and

C7.

Check and

Rl.

Check and

Check

STOUX FAttS,

replace

replace

replace

continuity

II\IC.

S.

DAKOTA

if necessary.

necessary.

if

if necessary.

6volt

of

57107

secondary.

Form

No.

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