Admiral C322C2, CS322C2, C322C17, CS322C17, CS322C26 Service Manual

TODTL IDTNTITICAIION

CHART

MODEL

NUMBERS

CHASSI5

MODEL

NUMBERS

CHASSIS

C3ZZCz

CS3?,ZCZ

C3Z?,C3

cs3z.z.c3

C3Z?,Q16

cs322C

l6

C3ZZCTT

CSSZ?,C11

c3?.zcz6

29ZI

EgSZI

29z;,1

ZgSZI

ZgZL

Z9SZI

ZgZL

Z9SZL

Z9.ZL

QS3?,ZCZ6

C32ZCZ7

cs3zzc?7

LC3?2C36

LCs3ezc

35

LC3ZZ,C37

LCS322C37

LC3ZZC39

LQ,3ZZC39

Z9SZI

zgzr

ZgSZL

Z,9ZIB

ugszlB

ZgZLB
LgSZLB

?9ZIB

z95ZlB

TABII OT

(ONTTNTS

SPECIFICATIONS

IIITPORTANT SET.UP

HINTS

PRECAUTIONS

PRELIMINARY SER,VICE ADJ.

ADDITIONAT SERVICE

ADJ.

SET.UP

ADJUST'IIENTS

COLOR PURITY

CONVERGENCE

TOUCH.UP

OF

PURITY

TOUCH.UP OF

CONVERGENCE

BTACK

& WHITE

TRACKING

CIRCUIT DESCRIPTION

B L

OC

K

D I

AGRAIVI

.2921

CH ASSI

S

ALIGNTYTENT

TROUBLE

SHOOTING

CHAR,T

CHASSIS PARTS

LIST

CABINET

PAR.TS LIST

SCHEMATIC-TUNER

TUBE

LOCATIONS

VOLTAGE

&

WAVEFOR.frT DATA

SCHEfrTATIC DIAGRA}TS

E"

rr

rt

n,

E

r

E'

B

E

E

Iil

w

I

E

Etr

EI

E

,t

E'

ql

q1

@l

:;

BI

Pege

2

SPECIFICATIONS

PICTURE

TUBE

Type

2LAXPZZA

round

21't

three

gun

shadow

rnask type--alurninized tricolor

phosphor

screen.

Magnetic

deflection--rnagnetic

convergence--electrostatic

focus.

OPERATING VOLTAGE

110-120

volts, 60 cycles,

AC only

WATTAGE

380

watts

INPUT IMPEDANCE

300

ohrns balanced

to

ground.

ANTENNA

See

TIANTENNA

REQUIREMENTSTT on

page

4.

IF

T'REQUENCIES

Intercarrier

IF: Video

45.75

MCi

Sound. 4L.25

MC

Sound

IF:

4.5

MC

FUSE

LOCATION

See

rrTube"Location

Diagrarn'r

on

page 56.

IUBE

COiTPLEMENT

2921

vI0l

Y102

v20l

YZO2

YZo3
YZ04

vzoS

YZ06

v301

v302

v303
v401
Y402
v403
Y404

6BN4

VHf'RF

Arnp.

6CG8

VHF

Mixer-Osc.

6AZ6 tst

IF Arnplifier

5826 2nd

IF Amplifier

6826

3rd

IF Amplifier

6CB5 4th

IF Arnplifier

LZBYT

Luminance

(Y)

Arnplilier

6au6

Gated AGC

5UB

Sound IF.

-

lst Audio Arnp.
6AL5 Ratio Detector
6V6cT

Audio

Output

6AW8 lst

Chrorna

Arnp.

-Color

Killer

5CL6

Chrorna

Amplifier

LZB}IT

Chrorna

Demodulator

?LAXPZZA

Picture Tube

V501

5BH8

Burst Amp.

-Pulse

Shaper

V502

6AL5 Color

Phase

Discrirninator

V503

6U8 3.58

MC

Osc. - Osc.

Control

V601

6CS6 Sync

Separator

V602

6CG7 Sync

Inv. - Vert. Osc.

V603

6AQ5

Vertical Output

V604

6CGZ

Horizontal

Oscillator

V605

5CB5A Horizontal Output

v606

6AU4caA Damper

Y607

IYZ Focus Rectifier

V608

3A3

H. V.

Rectifier

V609

6BK4 Shunt Regulator

V701

5U4GB L. V.

Rectifier

V702 5U4GB

L. V. Rectifier

TUBE

COiTPLE}TENI

29ZIB

Chassis

Z|ZLB

uses

the

sarne

above tube cornplernent

but

with the

following

exceptions:

Tube

type 6BV8

-- Ratio

detector

and

separate

additional

audio

amplifier.

Tube

type 6L6GB

--

Audio

Output.

Poge

3

TUBE CO}TPLEMENT

29SZI

Chassis

Z?SZL

uses the sarne

tube cornplernent as 29Zl but with

the

following addition:

Tube type

6Af'4A

--

UHF Oscillator.

TUBE

CO'IIPLEMENT

29SZIB

Chassis

Z9SZLB uses

the

sarne

tube cornplernent

as 29218

but with the

following

addition:

Tube type 6AF4A

--

UHf'

Oscillator.

IMPORTANT

COLOR R.ECEIVER SET.UP

HINTS

flM[:*,yl,,,;Ti::""x;'."",1ffi

il""i?[#"J.":?*."1?#",I]"i.ii,1x;

understanding

the lirnitations

of

present

day design will enable

you to fully acquaint

yourself

with

the

color receiver.

Tll€ll

read

the

"PRELIMINARY

sERVICE

ADJUSTMENTS"

on

pase ?,

turn

on

J

'.2t-

the

receiver, and deterrnine which

service adjustments

are necessary.

These

adjustrnents

should be rnade before the

I'COLOR

SET-UP

ADJUSTMENTS".

llufi

':"fiffi

'iJ,:";";'.'r:;J;si";Tlr;T;.i;ilTi'J1'"T';;;:'i

first read

completely,

it

will

be

easier

to

decide what

adjustrnent is necessary.

The

uprt and

[cornpletetr

procedures

are

outlined

under

this

section.

KNOW

THE

COTOR

RECEIVER

IMPORTANT:

The

following data should be read

cornpletely before rnaking

any color

set-up adjust-

ments.

I N SI A

t

L AI I O

N

RE Q U

I R E M

E

N I S

The color

receiver

should be

placed

away

frorn bright

windows or lights.

Sorne

light

in

the

roorn is desirable but should

not

fall directly on the

screen. Receiver

should

always

be

viewed

in a roorn with low

light 1eve1.

Allow

for adequate

ventilation. Receiver

should

be placed

away

frorn radiators,

heat-

ing vents, etc. Do not

place too

close

to walls.

Be

sure receiver is

conveniently

located

near electrical

outlet

and

for

antenn& conn€c-

tion.

IMPORTANCE OF DARK AREA FOR

SEI.UP ADJUST}TENIS

Since ultirnately, the

fidetity of color

reproduction

is dependent

upon

the

accuracy

of

the

convergence

and

purity

adjustrnents, these

adjustrnents

should

be

rnade

in

a darkened

room

with the receiver in the

sarne location

and

position as

used

for

viewing.

Window

shades,

venetian

blinds, etc. should be

drawn or closed to

eliminate

as rnuch

light

as

posslble.

If

enough

light

cannot

be

elirni.nated,

the color

receiver shouldg!b.

set-up

in that

area

or

roofiI. A

large cardboard carton

or cloth

shroud can

be

placed

over

the

cabinet

to

darken

set-

I

are

'rtouc}r

t

t

Poge

4

the screen for

ease

and

accuracy in perforrning adjustrnents.

It

is preferable

that the

ad-

justments

be

rnade with the

receiver

in the location where it

will

be used.

However,

ad-

justments

rnust be

checked

and

readjusted if

necessary, with the

receiver in the final loca-

tion,

position,

and with

the sarne

light conditions under which it will be viewed.

This

is

necessary

because

of the affect

of the earthrs

rnagnetic

field

and other

external rnagnetic

fields

upon color

purity

and

convergence.

For exarnple, a color

receiver

that is

properly

adjusted

facing a particular

direction,

rnay reproduce faithful

colors. If this

receiver is

turned or

ry1!

to face in another

directlon,

purity

and

gyg.ry,

rnay

now be

out

of ad-

justrnent.

The extent

of the effect of

rnoving the

receiver after if is set

up

will

vary

from

set to set and location

to

location.

TIMITS

OF PURITY AND CONVERGENCE

Perfect

convergence

norrnally cannot be obtained over the

entire

screen

area.

Picture

tube

and deflection

yoke developrnent

of

present-day design

lirnit this condition,

but it

should be

understood that with careful and accurate

adjustrnents,

a

very

good convergence

covering at

least 85% of the screen area

can be

achieved.

Good

convergence

in

the

four

corners

of

the raster rnay

not be obtained, but if..85%

(plus

or

rninus 5%l of. the

total

area

is accurately

converged, this is considered

a norlTral, acceptable

condition.

The

present-day

color

picture

tube

also

lirnits color

purity.

I4rith

careful

and accurate

adjustments, good

color

purity

can be

achieved for

each o{ the three

fields

with

good

black

and white reproduction.

Very

smalL areas of irnpurity at any

of

the four corners 6r

sides

of the

raster are

considered

acceptable.

BTACK

AND WHlTE

TR,ACKING

The

black and

white

tracking

adjustment

is another irnportant consideration. If

properly

rnade, the

color

set

will

produce

black

and

white

pictures

within the

norrnal

useable

range

of

both lhe

Contrast

and

Brightness controls.

If

the adjustrnent i" ir,Effii,TGtiE[T.-

ture wllI appear

tinted and

the color will

vary

at

different Brightness

and

Contrast

control

s etting s

.

Cornplete

TTBLACK

AND

WHITE

TRACKING'|

instructions are contained in the

"COLOR

SET-UP

ADJUSTMENTS"

on

page

II.

DEATER

AND CUSTO}TER INSTRUCTION

The Operating Instructions

packed

with the

receiver

should be

reviewed

with all

those

who

will operate

and

use

a

color

television

set.

The expected

perforrnance

and

lirnita-

tions of the color

set should also

be explained to the

dealer

or customer.

This

will help

thern

rrunderstandrt

their color receiver.

DEMAGNETIZING IHE

COLOR

PICTURE

TUBE

Satisfactory

purity and/or

convergence

of

a

color

receiver rnay be

difficult or

irnpos-

sible

to

obtain if

the metal

parts

of the

picture

tube or chassis

have

become magnetized.

Therefore,

a dernagnetizing or degaussing

procedure should be

perforrned before making

the

Color

Set-Up Adjustrnents. Instructions

on how to make

a dernagnetizilrg

coil

are

given

under

"DEMAGNETIZING

COIL"

on

page 49.

ANTENNA

REQUIRTMENTS

The

antenna requirernents for color

reception

are rnuch rrrore

critical

than

for black

and

Y

(

Y

(

Y

U

Poge

5

white

reception.

tr'or best

color reception,

a broad

band antenna

should be used.

It

should

also

have

an

essentially

flat frequency

response

characteristic across

the

frequency range

of

the

desired

channel.

Some antennas

of

the

'rYagitr

type

do

not rneet

these

requirernents

and should

not be

used.

Built-in

and

Indoor antennas

!o 4ot

rneet

these

requirernents

and

should

not be

used.

The

CONICAL type antenna

is a good

choice for

color

reception.

Antenna

orientation

is also

rnore

critical than for

black

and

white reception.

Sorne

an-

tenna

positions

rnay

provide

adequate black

and

wh:ite

reception,

but poor

color

reception.

If color reception

is poor,

and

the receiver is

operating

properly,

the antenna ehould be

oriented

for

best

color reception

while

receiving

a

color

program.

If

several stations are

received

frorn

different

directions, an antenna

rotator

rnay

be

required.

Multiple

antenna

installations, particularly

those

ernploying

distribution

arnplifler

sys-

terns,

rnay not provide

satisfactory

eolor reception.

Many TV

boosters do not

have

suffi-

cient

bandwidth for

color reception.

Standing

waves present

on the antenna

lead-in

can also result

in

poor

color or no color

reception.

The

lead-in

should

be

properly

rnatched

to the r"ceivurFelkninate

tffi condi-

tion.

To deterrnine

if

standing waves are present,

any

one o{

the two

following

rnethods can

be

used:

METHOD 1.

Insert a LZ db pad

between receiver

antenna

terrninals

and

lead-in

as

shown

in Figure

1, or,

METHOD 2.

Slide a piece

of tlnfoil

(wrapped

around

the lead-in) atong

the

lead-in.

260 0}lrs

t?

GENERATOR

OUTPUT

500 oHIs

500 o}lrs

TO

RECEIVER

ANTENNA

TERMINALS

+21I

200 0}lrs

Figure

1. 12 db

Pad.

In either

of the above

two rnethods,

if the signal

increases

in lntensity,

it'is an

indica-

tlon

that standing

waves are present.

lf

signal

intensity

does

not irnprove,

rernove pad

or

tinfoil and. reconnect

antenna

lead-in

to set.

I{

poor

or

no

color reproduction

is

stilI

experienced,

the receiver

or

antenna

ehould

be checked

further.

If signal

intensity

does

irnprove,

and

METHOD l was used,

leave

pad

connected.

lf

METHOD 2

was

used,

slide foil

along lead-in

until best picture

is obtained.

Fasten

foil on lead-in

with

tape

at

that

point.

U

Poge

6

PRECAUTIONS

HANDTING

OF

CHASSIS

The

picture

tube used

in

this

chassis

is rnuch

rnore

fragile than

any black

and white

pic-

ture

tube. The

possibility

of

accidental

breakage

is increased

because

of

additional

assem-

blies mounted

on the

neck of the tube.

The

foltowing

precautions

should be taken.

t. It

is irnportant that

ehatterproof

goggles,

heavy

gloves and

a

protective apron

be

worn while handling

or

installing

a

picture

tube.

2. Do not

slide

the

assernblies

rnounted

on

the

neck of the

picture

tube

hastily

or

care-

lessly,

and

without

observing the

procedures

given.

3. Scratching,

burnping or excessive

pressure

on

the

picture

tube

can

result

in

an ex-

plosion

of considerable violence.

The

circuits of this chassis

are

more

nunierous

and cornplex than

in black

and white

re-

ceivers.

Rough or careless

handling

increases the

possibility of

accidental circuit

faiLures.

HIGH VOLTAGE

WAR,NING

Very

htgh

voltage

is

present at sorne

points in this

receiver.

The

20,000 volt

high

volt-

age

regulated supply has

sufflcient energy

to cause

severe injury

or

death.

It ls

irnperatlve that the

following high voltage

precautions

be observed.

1.

Operation

of the

set outside of the

cabinet

or with the

cabinet

back

removed

is a

po-

tentlal

shock hazard.

Z. Severe

shock

can

result

without

rnaking

physical contact

with

any

high voltage

sources.

At all

tirnes

when the

receiver

is operating,

keep

at least

3rr

away

frorn

all points

where

high

voltage

is

present.

3. This

set usea

a rnetal coned

picture

tube

that

is

protected

by a covering

insulator

(boot).

At the

front edge of

the tube

near the

rnetal-to-glass

seal

,

there

is consid-

erable

shock hazardwithln

a distance

of

approxirnately

3'r

frorn

this edge.

X.NAY WARNING

'When

the

set is operating,

the

screen

of the

picture tube

radiates

soft

X-Rays.

These

are norrnally

absorbed

in the

safety

glass front,

but

operation

of the

receiver

outside

the

cabinet

leaves the

screen

unprotected.

This

results

in

a focal

point of these

X-Rays

at

a'

bout

9r'in

front

of the

central

screen

area. Exposure

within

this

area

for more

than

l7

hours

a

week inay

cause

physical injury.

The

X-Rays

are weaker

around

the

edge

and

sldes of the tube.

Physical

exposure

time

around

this

area is unlirnited.

When

maklng

adjustrnents

with

an

r.rrprotected

picture

tube,

avold

rernaining

in the

area

directly

ln front of the

plcture tube

for

rrrore than

the

17 hours

per

week

tirne

lirnit.

If

it

becornes

necessary,

slrield the

front

of the

tube

with

plate

glass

(at

least

l/4"

thick).

Thls

will

absorb

all X-Rays

from the

front

area of the

screen.

Y

(

t(

U,(

"t

I

t

Poge

7

PRELI'WNARY

SERVICE

ADJUSTMENTS

It is lmportant

that any

prelirninary

service adjustrnents

be

rnade before the color set-up

adjustrnents

to

prevent

upselting

color

purity

or

convergence.

Carefully check, and

if necessarlr

rnake the following

adjustrnents

in

the

order listed be-

Iow.

CHANNET

STUGS

The setting

of

the

Fine

Tuning

control

and

Channel Slugs

are

rnuch more critical

for

col-

or

reception.
Be sure

the correct

point

of tuning, as described

below, oscurs at

approxirnately

rnid-

rotation

of the Fine

Tuning control.

IMPORTANT:

If the

Channel Slug

or

Fine Tuning

control is slightly

rnisadjusted for a black and

white

prograrn,

the

picture

and

sound

rnay

still be

acceptable.

With the

same

Channel Slug

and

Fine

Tuning

control setting for a

color

prograrn,

the

picture

rnaygg!

E

t. color.

The

customer

should

be farniliarized with

the irnportance of

correctly

setting

the Fine

Tuning

control.

If

Channel Slugs

need

adjustment, proceed

as follows:

A.

Turn on set.

Allow

15

rninutes for

warrn-up.

B.

Tune

in station

and set for

norrnal picture and

sound.

C. Set Fine

Tuning control at approxirnately

rnid-rotation.

IMPORTANT:

See f

igure 2 for position

of

Fine

Tuning

carn for

rnid-rotatlon

setting.

When

carn

is

in thls

posltLon,

Fine Tuning control is at rnid-

rotation.

D.

Rernove

Channel Selector and

Fine Tuning knobs

and

insert a Lf

8"

blade,

flexlble

non-rnetallic

tool through

the hole

adjacent

to channel

selector shaft.

See f

igure

z,

E.

For

each channel, carefully

turn

Channel SIug until

sound bars appear

in

plcture.

Then

turn

slug

toward best

picture

until

sound bars

just

disappear.

Caution:

Only

slight

rotation

of

slug

is

necessary.

Turn-

ing

the slug

clockwise

too far

will

cause

it to fall into

the

coil.

Figure 2.

Front

View

of

Tuner

Showing

Mid-Rotation

of

Fine

Tuning Control.

f

?

CHANNEL SLUG

ADJUSTMENT

t1

Pege

8

HORIZONTAL SNYC

The

picture should rern,ain

in sync throughout the

range

of the

Horlzontal

Hold

control,

even

when interrupting the signal

by switching on and off station. See Figure

3 for

location

of

Horizontal

frequency

control.

The

HORIZONTAL SYNC

adjustrnent is

per{orrned the sarne way

as

on

a black

and

white

receiver

using the rnultivibrator

and discriminator

rnethod

for

horlzontal

sync

and

sweep.

For

exarnple,

all

20Y4 series

black and white

receivers use this rnethod.

RASTER TItT ADJUST}IENT

If

raster is tilted, loosen the

@g

wing

bolts

(A) (see

Figure 3)

and rotate

yoke until

picture

is straight.

Tighten the

wing bo1ts.

Note:

tr'igure 3

shows

the

location of only

two wing

bolts

(A).

The third

is located on

the sarrre bracket

directly

underneath the

picture

tube

neck.

HEIGHI

AND LINEARITY

These

adjustrnents

are

adjusted

the

sarne way on the color

receiver

as

on

a black

and

whlte

receiver.

Be

sure to adjust for best

height and linearity

with the

picture

set at

ap-

proxirnately

llZt' beyond

the top

and bottorn lirnits

of

the

rnask. The HEIGHT

and

LINEAR-

ITY controls

are located behind

the

rernovable

panel

under

the

safety

glass frarne.

Re-

rrrove

the

four

screws frorn

under

bottorn edge of the

panel.

Panel

can then

be

easily

re-

rnoved.

Adjusting

HEIGHT

and

LINEARITY

after

color

set-up

adjustrnents rnay upset

color

purity and

convergence.

Flowever,

if only

a

slight touch-up

is

necessary

following color

set-up

adjustrnents,

the

effectEy

be negligible.

HOR!ZONTAt DRIVE

Adjust

the

HORIZONTAL DRIVE

control to a

point

where the

white vertical

line(s)

just

disappear, or

to

rna><irnurn if drive lines

do not appear. See Figure

3 for control

location.

Ma<irnurn

drive is at

rnaxirnurn

(cornpletely

clockwise)

rotation

of the control.

HORIZONTAL

AND VERTICAL CENTER.ING

Adjust

for

proper

horizontal and

vertical centering.

See

Figure 3

for control

locations.

(

(

l}

rll,

WNG

BOLT

Poge

9

TYING

tsOLT

@

WING

BOLT

HORTZ.

NEARITY

FOCUS

@

WING

BOLT

.t

,1,:.:

trt'tj:i!,li:il:!ll:a,,irj:

:.-:::::-:ra:::ri:!i:,.4

j

c;!r'

:i

r'i:l:ii.lli:i:lef

!iia:i:l::;!:.

':.:.r

:;r :r:.:ii.r:!t1t1{1ij:

rii:

!,-:i:,i.:rirrielr::r!$;1r.

:iu:1i!i;1iiN.,:;!:.45;d

ffi"}

..'r

E#Sl

.',

lrr:i;;l.,:t;I::tti:::i;i:ti:

rt:tr

i:da!ii!i:!iii:::j:i!r

ti;;l:t

i

HORTZ.

CENT.

@

tO
@

9

FUSES

Figure

3. Top

Rear View

of

COLOR STRIPE

TEST

Chas

sis

Showing

VERT.

CENT.

HOR

rZ.

SYNC.

HOR

rZ.

DR!VE

Adjustrnent

and

Control Locations.

:

Poge

l0

ADDITIONAL

SERVICE

ADJUSTMENTS

REQUIRING

TEST

INSTRUMENTS

The

{ollowing

test

lnstrurnents

are

required

for the

1. VTVM

with

30

KV

high

voltage

probe'

Z. Milllarnrneter

(0

-

I

rna

range).

3. Milliarnrneter

(0-500

rna

range).

HORIZONTAL

TINEARITY

following

adjustments.

Hfi

ffi

:,,""1::";:"#*E'ff;:'rJiHxili,

controlonthecolorreceiverisrnuchrnorecritical

and

requlres

a different

adjustment

procedure'

Mis-

adjustrnent

of the

HoRIzoNTAL

LINEARITY

control

onacolorreceiverwillhaveverylittleeffectupon

the

actual

horizontal

llnearity,

but

can

result

i'44-

ggg to

the

6CB5A

(horizontal

output

tube)

or

associated

colrpon"nt".

For

this

reason,

the

adjustnle-nt

iF

accu-

.rtuiy@v@]Jv

should

not

re-

iffim'ffi,,IjriJ"''

.oiI

,

"t..

in the

field

rnay

require

adjustment

of

the

HORIZONTAL

LINEARITY

control

by

the

service

technician.

If

adjustment

is

required'

the

follow-

ing method

is

recomrnended'

Note:

A

DC milliarnmeter

(0-500 ma

range)

is

required

for this

adjustrnent'

Adjust

as

follows:

l. Rernove

fuse,

F604

frorn

its

holder.

See

"Tube

Location

Diagrarnil

page 66

for

fuse

location.

z. Insert

a

Dc

rnilliarnrneter

between

fuse

holder

terrninals

(positive

terrninal

of

rneLer

connected

to

toP

caP)'

3.

Tune

in Black

and white

picture.

Adjust

BRIGHTNESS,

CoNTRAST'

FOCUS'

vER-

TICAL,

and

HORIZONTAL

controls

for

a norrnal

picture'

i

,,

:.-

4.

Adjust

the HoRIZoNTAL

DRIVE

control

to

the

point

where

the

vertical

drive

line(s)

justdisappears,oratrnaxirnum(clockwise)ifnodrivelineispresent.

5.

Adjust

the HoRIZoNTAL

LINEARITY

control

for

minimurrl

current

reading'

(Mini-

rnurn

cathode

current

of

horizontal

output

tube)'

Repeat

step

4

for optirnurn

drive

setting'

AdjusttheHORIZoNTALCENTERINGcontroltocenterthepicture.

{

6.

U

T

il

i

;

r

I

Poge

I I

HIGH

VOLIAGE

REGUTATOR.

HORIZONTAL

LINEAR'ITY

A

line

voltage

of I 1?

volts

should

be

rnaintained

during

this

adjustrnent.

See

Figure

3

for

adjustrnent

locations .

?

Caution:

Milliarnmeter

leads

will

be at B

p}us

potential

(380

volts).

Be

sure

to

isolate

rneter

frorn chassis'

10.

Readjust

the HoRIZONTAL

LiNEARITY

coil

in the

direction

o{

less

inductance,

(slug

moving

outward

frorn coil)

until

the

cathode

current

of the

Horizontal

Output

tube

is

approxirnately

200

rnilliamperes.

Do

not

exceed

210 rnilliarnpeles

as

lin-

earity

is disrupted

above

this

value

of current.

The

High

voltage

should

read

in

the

range

o{

tg.5

to

ZL.5 KV,

with

regulator

current

of

750

to

I000

microamperes'

optirnurn

setting

is

200

rnilliarnperes

output

tube

current

with

20 KV

high

voltage

and

regulator

current

of

950

rnicroamperes'

For

line

voltages

between

105

and 11?

votts,

adjust

HORIZONTAL

LINEARITY

control

accordingly.

For

exarnple,

aline

voltage

of

110

volts

results

in

a

ratio

of

I10

llLT

or.9i

(r"irrg

117 volts

as standard).

Therefore,

the

high

voltage

would

be

set

at.

.g4

x

20,000

volts

or

18,800

volts.

Maxirnurn

Horizontal

Output

tube

cur-

rent

becornes

.94

x 210 rnilliarnperes

or 19?

rnilliarrrperes

and rninirnurn

optirnurn

regulator

current .94

x 750 rnicroarnperes'

Rernove

rneters

and

replace

test

jurnper

wire

and

fuse'

Repeat

steps

4

andT

if'

necessary.

overscan

should

be

approxirnately

I

Ll4

inch

each

side"

Il.

Recheck

vertical

height

and

linearity.

Overscan

should

be

at least

LIZ

incln

at top

and bottorn.

8. Set

the BRIGHTNESS

and

CONTRAST

9.

Connect

a

DC

rnilliarnrneter

(0-1

rna)

6FK4

regulator

tube

(positive

lead to

.rneter

insertion.

IMPORTANT:

Before

adjustrnents

(Purity or

you have.

controls

to minirnurn,

(

for bearn

cutoff).

in

series

with the

cathode

(Pin

#i)

of the

cathode).

A test

jumper

is

provided

for

rl7

o

@

o

@

o

COLOR.

sET

-

UP

ADJUSTMENTS

rnaking

any

color

set-uP

Convergence)

be

sure

read

page

3,

"IMPORTANT

COLOR

SET-UP

HINTS",

and

followed

through

with

the

instructions,

checked

and rnade

any necessary

prelirninary

service

adjustrnents,

checked

the

receiver

f6r

perforrnance

after the

prelirninary

service

adjustrnents,

read

this

section

cornPletelY,

decided

whether

the

color

receiver

needs

a

rttouch-up"

of

so ne color

adjustrnents

or

a

ncornpleterr

color

set-up

adjustrnent'

U

Poge

12

A

"cornplete'r

color

set-up

adjustrnent

consists

of the

following

steps

in

the order

given.

I

CENTER

STATIC

CONVERGENCE

(DC).

See Figure

lr.

II

COLOR

PURITY

III

CONVERGENCE

IV

TOUCH-UP

OF PURITY

V

TOUCH-UP

OF

CONVERGENCE

I

VI BLACK

AND

WHITE

TRACKING

(Good

black

of

the

Brightness

control)

If the

receiver

requires

a

trcornpleterl

set-up

adjustment,

rnake

all

adjustrnents

listed,

including

the

'rtouch-up'r

adjust-

rnents

"

If the

receiver

requires

only

a

rrtouch-up"

of sorne

color

adjustrnents,

rnake

those

adjustrnents

only.

Check

the

{ollowing

parts

for

cor-

rect

positioning.

See

Figure

4.

ASSEMBLY

PURIFYING

MAGNET

DEFLECTTNG YOKE

Figure

4.

Si.de

View

Showing

the

Relative

Placernent

o{

Neck Cornponents.

and

white

RADIAL-

CONVER6ING

MAGNE T

hout

9

RAL-

;RGING

NET

the range

I

I.

z.

BtUE

TATERAL

MAGNET

ASSETIBtY

The

rnagnet

within

the

sma1l

circular

holder

(in

the assernbly)

should

be

over

the

lateral

converging

pole

piece,

approximately

at

a

two

orclock

position

as

viewed

from

the

base

end

of

the

picture

tube.

The assernbly

stides

along

the

neck

of the

tube

sirnilar

to an

ion

trap

rnagnet

on

a

black

and

white

receiver.

PURITY

RINGS

The

PURITY

RINGS

should

be positioned

grid

ff4

of

the

electron

guns.

The

pURITy

CONVERGENCE

YOKE

ASSE'ITBtY

over

the opening

between

grid

f3

and

RINGS

slide

along

the

tube

neck.

This

assernbly

should

be positioned

so

that

its pole

shoes

are

directly

over

the

pole

pieces

in

the

electron

guns.

The

inside

of

the

tube neck

surrounding

these

pole

pieces

is

covered

with

Aqua-Dag

rnaking

it

irnpossible

to see

thern.

However,

the pole

pieces

are

located

just

in front

of

thl

targe

circuLar

disc

which

is

visible

when

the

tube

neck

is

viewed

frorn

the socket

end.

If necessary

to

re-position

the assembly,

slid.e

or

tu3:n

on neck

of

tube.

Be cer-

tain

that

the

bottorn

of

the

assernbly

is

horizontal.

'When

correctly

placed,

the center-line

of the

core associated

with

the

blue

gun

should

be

approximately

I 5/8

inches

in front

of

the center-line

of the

lateral-

converging

internal

pole

pieces.

u

Poge 13

DEFLECTION

YOKE

CONVERG.

YOKE POLE

PIECES

PURITY MAGNET

BLUE

BEAM

LATERAL

MAGNET

/:.

-1

&

tla

Figure

5. Transparent

View

of

Neck

of Picture

Tube

Showing

Correct

Positioning

of

Parts,

Adjustrnent

Locations

and

Identification.

o

(o
(o

o

D

t

'1

i

I

I

I

GRILL

CLOTH

COVERED

PANEL

(SLIOES

DOWN

AFTER

SCREWS

HAVE

BEEN

REMOVED)

ANGLE

AT

WHICH

MUST

BE

SCREWDRIVER

USED.

ru

POSTTTON

OF

SCREWS

rD

Figure

6. Front

Panel

Rernoval

.

Poge

14

4.

DEF

TECTION

YOKE

The

DEFLECTION

YOKE is

autornatically

centered

about

the neck

of

the

tube

d.ue

to

the yoke

and

picture

tube

rnounting

rnethod.

Norrnally, yoke

centering

need

not

be

checked,

but

if

it

becornes

necessary

due

to difficulty

in

rnaking

color

adjustrnents

or if

the receiver

requires

aricornpleterrcolor

adjustrnent,

perforrn

the following

steps:

a'

Slide

BLUE

LATERAL

MAGNET

and

PURITY

RINGS toward

base

of

tube neck.

b.

slide

CONVERGENCE

coIL

ASSEMBLy

toward

base

of

tube.

c.

Check

yoke

centering

about

neck

of picture

tube.

lf

yoke

is

not

centered.

and

yoke

brackets

are

not

dented,

etc.,

check

the two

hex

nuts

"G'r

under

the yoke

to be

sure

they

are

tight.

see

Figure 5.

(Figure

5

shows

location

of

only

one

hex

nut

,Gtr.

The

other

is

in sarne

position

on oppo-

site

side

of

bracket.

)

AIso

check picture

tube

mounting

rods.

See

,REMO1;AL

OF PICTURE

TUBETT

on

page

48

{or

rnounting

rnethod,

etc.

I

1

{

Poge

15

COTOR

PURITY

Before

adjusting

for

color

purity,

it is

recomrnended

that

the

magnetlc

parts

of the

pic-

ture

tube

be

dernagnetized..

If

any

parts

of the

picture tube

have

become

rnagnetized,

puri-

ty

or conv.rgurr".

rrray

be

difficult.

FuII

instructions

are

given below.

(See

page49f'or

de'

rnagnetizing

coil

construction

procedure.

)

DEMAGNETI

ZING

IN

SIR

UCIIONS

I. With

receiver

off

,

place in

sarne

position

toward

you

as for

viewing.

Rernove

the

screws

from the

strip

of wood

at the

top

of the

safety

gIass. Rernove

safety

glass

and rnask'

Z.

pull

lhe

rirn rnagnets

all

the

way

out

into their

shields;

else

the

dernagnetizing

coil

rnay

dernagnetize

tirre

rirn

rnagnets"

See

I'igure

?

for

rirn

rnagnet

locations.

3. Place

the

coil

around

the

picture tube

at

the

face

plate.

Energize

the

coil'

4.

Keep

the

coil

positioned around

the

picture tube

for

at least

one rninute,

and then

slowly

withdraw

the coil

to

a distance

of 15

feet or rnore,

keeping

the

plane of the

coil

parallel

to the

picture

tube

{ace

plate

at all times.

5.

If

irnpossible

to

back off

to 15

feet, this

distance

can

be simulated

by withdrawing

the

coil

to

a

distance of

about

5

feet

and then

gradually

reducing

the

coil

supply

voltage

to

zero

by use of

a

Variac

or

sirnilar

device.

6. Repeat

steps

3

through

5.

CHECK

ond

ADJUSI

COtOR.

PURIf

Y

os

follows

I. If

{ront

panel

has

not been

rernoved,

rernove

the

four

screws

frorn under

the

rernovable

panel

(covered with

grille

cloth

on rnost

rnodels)

located

on

front of the

set,

directly

un-

der

safety

glass

frarne.

See Figure

6.

The

panel can

then

be easily

rernoved'

(Do

not

replace

panel until

all color

adjustrnents

have

been

cornpleted.

)

Z.

With

receiver

on, turn

CONTRAST

to rninirnurn

and BRIGHTNESS

to

near

rnaxirnurn

(see

Figure

8

).

3. Turn

RED, GREEN

and BLUE

SCREEN,

and

GREEN

and BLUE

GRID

controls

to

rnini-

rnum.

See

Figure

9-

4. Turn

RED

SCREEN

to

provide

a bright

raster.

Observe

field

purity of

red

raster.

Note:

If

@lI

areas

of irnpurity

are

noticed

only

around-4gSg

of

raster,

a

rrtouch-up"

of

purity

should

be tried

before

proceeding

with

step 5.

See

"TOUCH-UP

OF

PURITY"

on

Page

23.

If

large

areas

of

irnpurity

are noticed

around

edges,

topr

bottorn,

or

central

areas,

continue

with

step 5.

5. Set

alt

six RIM MAGNETS

to

rninirnurn

posltion

(away

frorn

tube).

See

Figure

7

for

RIM MAGNET

locatlons.

3

?

U

6.

Poge

15

Turn

all

HORIZONTAL

CONVERGENCE

frorn

the

coil

form

end.s.

See

Figure

I0.

7'

Turn

the

YERTICAL

CONVERGENCE

AMPLITUDE

controls

counter-clockwise.

Set

the

VERTICAL

TILT

controls

at

rninirnurn

(approxirnately

rnid-position).

8' Set

the

PURITY

MAGNET

for

minimurn

magnetic

field (colored

tabs adjacent).

9.

set all

six

RIM

MAGNETS

to rninimurn

(away

frorn

tube).

STATIC

CENTER

DOT

CONVERGENCE

t1.

App1y

the signal

frorn

a

white

dot

generator

to

the

color receiver.

Turn

CONTRAST

control

up

to

rnaximurn.

Turn all

SCREEN

and all

GRID

controls

to

rninirnurn"

Just

extinsuish

the dot

presentatlon

with

the

brightness

control.

Then

turn up

the

RED,

GREEN

and

BLUE

SCREEN

controls,

and

GREEN

and

BLUE

GRID

controls

for

equal

size

small

dots-

The focus

control

rnay

be

reset

to irnprove

the sirnilarity

of

dot

shape.

Adjust

the

RED,

GREEN,

and

BLUE

Dc

CONVERGENCE

controls,

and

the

BLUE

LATERAL

MAGNET

to

produce

one

white

dot

at

the

center

of

the

picture

tube screen.

See Figure

I

1.

AMPLITUDE

and

TILT controls

3/8"

outward

See

figure

9

for

location

of controls.

turning

up

the

and

brightness

(

10.

lz.

13.

14.

15.

Alternately

observe

purity

of the

RED,

GREEN, and

BLUE

FIELDS

by

appropriate

SCREEN

and

GRID

controls (contrast

conlrol

at

rninirnum

control

near

rnaxirnurn).

If

any

hnpurity

exists

continue

with

Step

13.

Loosen

screws

IBrr(see

Figure

3).

Move

the yoke

back

and

forth and

rotate

each

pURI-

TY

RING going

back

and

forth

frorn

one

to the

other

until

the

purest

red.

raster

is

ob-

tained

over

most

of

the

screen

area

(particularly

over

the

central

,

top, and

bottorn

areas

).

Adjust

the

six

RIM

MAGNETS

by

rotating

and

pushing

thern in and

out until

the rnost uni-

forrn

red

raster

appears

around

the

edge

of the

screen.

Check the green

raster

purity

by

turning

the

RED

SCREEN

control

cornpletely

to

the left

and

turning

the

GREEN

GRID and

SCREEN

controls

up to

obtain a green

raster.

The

raster

should

appear

green

over

the

entire

screen

area.

Turn

the

GREEN

GRID

and

SCREEN

controls

cornpletely

to the

left and

turn

the

BLUE

GRID

and

SCREEN

controls

up

to

obtain a

blue raster.

The raster

should

appear

uniforrnly

blue over

the

entire

screen

area.

16.

Tighten

screws

rrBrr.

17.

Repeat static

center

dot

convergence

(step11).

Ifapure

red,

green

andblue

raster

is

not

obtained,

the picture

tube

rnay

not

have

been

cornpletely

demagnetized.

Repeat

DE-

MAGNETIZING

procedure

and

pURITy

adjustments.

18.

Recenter

the

raster

with

the

centering

controls

when

necessary.

(

Note:

If individual

pure

rasters

are

still

not

acceptable,

a

cornprornise

purity

adjustrnent

should

be

rnad.e.

(

(}

?

TUNER

MOUNTING

BRACKET

ANTENNA

TERMINALS

RETAIN!NG

RODS

CONVERGENCE

YOKE

PLUG

&

SOCKET

GROUND

SPRING

RIM MAGNET

Poge

17

NUT

PLASTIC

BOOT

RETAIN

ING

ROD

NUTS

RIM

MAGNETS

SPEAKER

SOCKET

HIGH

VOLTAGE

INTERLOCK

(

MOUNTED

BEHIND

SAFETY

GLASS.

)

o,

rO

(o

o

?'.['..ttJl?,[

&

SOCKECT

Figure

7. Right

Rear

View

o{

H

IGH

VOLTAGE

CONN

ECTOR

Chassis

Showing

Control

Locations.

Poge

18

CONVERGENCE

convergence

is

necessary

so

that

the

Red,

Green and

Blue

Bearns

are

rnuch

of

the

screen

area

as possible.

converged

over

as

In

general,

very good

convergence

can

be

achieved

over

screen

area.

A.

TEST

EQUIPMENT

85fl0

(plus

or

minus

5a/o)

of.

t]ne

A suitable

W'hite

Dot

Generator (such

as

ADMIRAL

Model

TE-100)

is

necessary

for

CONVERGENCE

adjustrnents.

See

',TEST

EQUIpMENT,,

on

page

3g.

B.

LOCATION

OF CONTROLS

The

STATIC

Convergence

controls

are

located

on

the

fronl

apron

of the

chassis

and

the

Blue

Lateral Magnet in

its

holder

on

the

tube neck.

See Figure

5.

The

DYNAMIC

Convergence

controls

are

located

on the front

apron

of

the chas-

sis.

Rernove

the four

screws frorn

under

the rernovable

front panel

for

access

to

controls.

The panel

is

then

easily

rernoved.

Identification

of

these adjustrnents

is

indicated

in Figure 9

and

on

a

label

on the chassis

apron.

ThC Effects

o{

the

HORIZONTAL

and

VERTICAL

AMPLITUDE

controls

and

TILT

controls

are indicated

in

Figure

12.

The

HORIZONTAL

TILT adjustrnent

for

I

(

OFF-ON

VOLUME

BRIGHTNESS

CHANNEL

SELEGTOR

CONTRAST

TONE

HORtZ.

HOLD

COLOR

INTENSITY

COLOR

FIOELITY

VERT.

HOLD

(

Figure

8.

Right

Front

Yiew of

Chassis

Showing

Location of

Operating

Controls"

L

?

lU

Poge

19

each color

will

cause

the

peaks

of

the

horizontal

waveforrn,

forrned

when

the HORI-

ZONTAL

AMPLITUDE

controls

are

advanced

fu1ly

to the

right, to

rnove

frorn

side

to

side.

C.

SET-UP

PROCEDURE

Apply

the

white

d.ot signal

to the

receiver.

See

step

10 under

PURITY.

Note:

Adjust

the three

guns to

provide

dots

of

intensity

d.istinct enough

for viewing

and equal

in

size, but

of

low

enough

intensity

to

keep the

dot size

at a rninirnurn.

Very

low

ambient

light

conditions

are recomrnended.

iMPORTANT:

If

only

a

touch-up

of

convergence

is

needed,

do

not

perforrn

the

following

3

steps.

1. Set

all

VERTICAL

TILT

controls

to

the

center

of their

rnechanical

rotation

range

(zero

saw waveform

applied

to

convergence

coils).

Z.

Set

all VERTICAL

AMPLITUDE

controls

cornpletely

to the

1eft,

(minirnurn

waveforms

applied

to

convergence

coils).

3.

SEt

A11

HORIZONTAL

AMPLITUDE

ANd

A11

HORIZONTAL

TILT

CONtTO1S

(COTE

StUdS)

3/8

inch

oulward

frorn

each

coil.

See

Figure

10'

STATIC

CONVERGENCE

CONTROLS

DYNAMIC

C ONVERGENCE

CONTROLS

1. RED

DC

Z.

GREEN

DC

3. BLUE

DC

4. BLUE

LATERAL

MAGNET

1

Z

3

4

5

6

RED HORIZ.

AMPL.

GREEN

HORIZ.

AMPL.

BLUE HORIZ.

AMP.

RED

HORIZ.

TTLT

GREEN

HORIZ.

TILT

BLUE HORIZ.

TILT

8

9

RED

VERT.

AMPL.

GREEN

VERT.

AMPL.

BLUE VERT.

AMPL.

10" RED YERT.

TILT

I1. GREEN

VERT.

TILT

LZ.

BLUE

VERT.

TILT

E

b

d l$

,b,5

d

H H

-hj'.

$:3::A

6"Q]$

(D

Figure

9.

Location

and

Identification

of

Color

Set-Up

Adjustrnent

Controls'

Poge

20

Figure

10.

Preset Position of

The

following

four

staternents

justrnents.

Horizontal

Dynamic

Controls

Be{ore

Beginning

Cornplete

Convergenc e.

should

be

kept

in

rnind

during

the

CONVERGENCE

ad-

o-

o

{

I

I.

The

purpose

of

the

DyNAMIC

controls

is

to

forrn

EeUAL

SPACING

between

the

color

dots

in

each

TR.IANGULAR

GROUP across

as

rnuch screen

area as

pos

sible.

The

purpose

of the

STATIC

controls

is

to converge

each of

these

TRIANGULAR

GROUPS

into

oNE single

dot

across

as

rnuch

screen

area as possible.

The

DYNAMIC

voltages

cause d.ifferent

dot

rnovernent

over

different areas

of

the

screen.

z.

3"

4,

The

DC

CONTROLS

cause

sarrle

d.ot

movement

over

the

entire

screen

PRE t !TIII

N

AR Y

CONVERGE

N

CE

area.

(

I.

Turn the

RED,

GREEN and

BLUE

DC

BLUE

LATERAL

MAGNET

within its

controls, and

if

necessary,

turn

the

holder

to

forrn

white

dots in

the central

@@

@@

@@

BLUE,GREEN AND

RED

DOTS SUPERIMPOSEO

area

of

the screen.

See

Fi.gure

t l.

Caution:

Do not

turn

or

rotate

the

BLUE

LATERAL

MAGNET

ASSEMBLY.

Note:

Either

a

cross

hatch

or dot

video

pattern

can be

used in the

following

convergence

procedure.

The cross

hatch lends

it-

seLf

better

for

rapid

convergence,

however

for accurate final

adjustrnents,

the

dot pattern

is

rnore

desirable.

Figure I 1.

Red, Green,

and

Blue Dots

Converged

in

Central Screen Area.

w

@4

@@

@o

--@+

(,

w

@@

@

@@

@

@@

@

w

@@

@

@@

@

@@

@

@@

@

OF

(

\-MOTION

OF BLUE DOTS

BECAUSE

BLUE

POSITIONING MAGNEI

[-

i

i

1

Poge

2I

+

l

t

a

+

a

+

a

I

+

a

i

a

+

I

I

a

I

I

v

a

I

V

t

I

a

g

?

v

a

I

V

?

I

?

I

V

a

I
I

t

{

1

EFFECT

OF

RED

EFFECT

OF

GREEN

E-IFECT

OF BLUE

veni. ampr-.

cor,tinol veRr. aupl.

coNTRoL

vERT. AMPL. coNTRoL

ON

RED

DOTS

ON GREEN

DOTS

ON

BLUE OOTS

I

I

t

I

t

I

t

EFFECT OF

BLUE

EFFECT

OF

REO

I VERTTcAL

TILT

vERTIcALTILT

E on BLUE

oors

oN

REo

oors

Figure

12.

Effect

of Dynarnic

Convergence

Controls

Upon

Dots.

VERTICAL

CONVERGENCE

I. Adjust

the RED, GREEN

and BLUE SCREEN

and the

GREEN

and BLUE GRID

controls

for norrnal

red,

green and

blue cross

hatch

pattern

(using

cross

hatch

generator).

2.

Using

the

blue vertical

center

line

as reference,

adjust the

RED

and

GREEN

VERTICAL

AMPLITUDE CONTROLS

to rnake

the

red

and

green

lines

syrnrnetrical

about,

or

to

over-

lap the

vertical

blue center

reference

1ine.

?

?

I

I

@

6
6

6

6

I

@

i

o

I

6

6

@

\

\\o

t\

''\')

\@/

9',

6

,Gl

rl

i\

(

@.\

.\,

b\

\

EFFECT

OF GREEN

VERTICAL

TILT

ON GREEN

OOTS

{l

(ll

t,q

Y

I

A

"P'),

tf,)

f

!

1

I

i

I

l

i

i

I

i

:

I

,

I

,l

1

I

I

i

I

EFFECT

OF

RED

HORIZ. AMPL. CONTROL

ON

RED OOTS

EFFECT

OF GREEN

HORIZ.

AMPL.

CONTROL

ON GREEN

DOTS

EFFECT OF

BLUE

HORIZ.

AMPL.

CONTROL

ON

BLUE DOTS

t'

Page

22

3"

Statically converge

the

center

of the raster using

the DC convergence controls

and

the

blue

lateral

rnagnet.

4. Adjust

the RED and

GREEN

VERTICAL TILT

CONTROLS

to

obtain as

straight

a

verti-

cal center line as

possible.

5.

Repeat

step

3, if necessary.

6. Adjust

the BLUE

YERTICAL

TILT

and

AMPLiTUDE

CONTROLS

to make the

horizontal

blue lines

equally

spaced or coincident with

the

associated red and green horizontal lines

along

the vertical

axis

of the tube.

7.

Repeat

step

3,

if

necessary.

8.

The

red, green

and

blue

vertical center

line should be nearly coincident

(overlapped forrn-

ing white).

If

necessarlr

repeat

steps

2

through 7.

HORIZONTAL

CONVERGENCE

1"

TUTN thc

BLUE

HORIZONTAL

AMPLITUDE and

BLUE

HORIZONTAL TILT

CONTROLS

out

fully

counter-clockwise

(rnaxirnurn

arnplitude,

rninirnurn inductance).

2.

Turn

the BLUE

HORIZONTAL

AMPLITUDE

CONTROL in

(clockwise)

until the

blue

horizontal

center line

bows downward,

slightly

to the right of the

center of

the

screen.

3.

Turn

the

BLUE

HORIZONTAL

TILT

CONTROL in

(clockwise)

to obtain

as

straight a

horizontal

center blue line

as possible.

4" Statically

converge

the center

of

the

raster,

if necessary.

5.

Repeat steps

I through

4 with

the

RED

HORIZONTAL

CONTROLS.

The

bow in

the

red.

center line is slightly

upward,

just

to the right

of the

center of

the

screen

in this case.

6.

Repeat

steps

I through

4 with

the

GREEN

HORIZONTAL

CONTROLS. The

bow in

the

green

center

line is

slightiy

upward,

just

to the right

of the center

of the

sc:een

in

this case"

FINAT CONVERGENCE

The

dot

pattern should

be used.

1. Touch up the RED, GREEN

and BLUE

HORIZONTAL CONVERGENCE

CONTROLS

for

best over-a1l horizontal convergence. There

is some interaction

which causes

the

Arnplitude Control to

effect Tilt

and

visa

versa,

but in

general

the controls

can be

treated

as

labeled.

2.

Touch

up the

RED, GREEN

and

BLLIE VERTICAL CONVERGENCE

CONTROLS

for

best

over

-a11

vertical

convergence.

r(

t"{

3.

Set the

best

over-a11

static convergence using

the

DC

CONTROLS

and

the BLUE LAT-

ERAL

MAGNET. The blue lateral tnagnet influences slightly

the bearn

from

the

red

and

t

(

green

electron

guns,

therefore, after

rnaking

final adjustment of the blue

lateral rnag-

net, readjust

the

RED

and

GREEN

DC controls.

Poge

23

TOUCH

I

UP

OF

PURITY

A

TOUCH-Up

of PURITY

rnay

be

required

on a

new

receiver

or

following

the

conver-

gence

adjustrnents.

In

either

case,

rnake

the

following

adjustrnents

until

good

purity is

achieved

for

the

red

field.

1. Perform

steps

Z, 3

and 4

under COLOR

PURITY

on

page 15.

2. Adjust

RIM MAGNETS

for

good purity

around

edges

of

raster.

3. SLIGHTLY

adjust

the tabs

on the

PURITY

RINGS,

if

necessary.

CAUTION:

ADJUSTMENT

OF

PURITY

RINGS

WILL

UPSET

CONVERGENCE.

HOWEVER,

THE

RESULTS

OF

A VERY

SLIGHT

ADJUSTMENT

MAY

BE NEGLI-

GIBLE

UPON

CONVERGENCE

AND

MAY

IMPROVE

PURITY.

4. Perforrn

step

12 under

COLOR

PURITY.

TOUCH

-

UP

OF

CONVERGENCE

A TOUCH-Up

of CONVERGENCE

is

not arrshort-cutrrfor

correctly

adjusting

the

re-

ceiver

for convergence.

Careful

reading

of

the CONYERGENCE

procedure,

or

previous

experlence

in rnaking

convergence

adjustrnents

will

aid the

servlce

technician

to deterrnine

whlch

controls

rnight

need a slight

touch-up.

It rnay

be found

that

following

the COLOR

PURITY,

CONVERGENCE

and

TOUCH-UP

of

PURITY

adjustrnents

that CoNVERGENCE

rnay

also

need

a

touch-up.

A touch-up

procedure

for

convergence

is

(1)

to

fo1low the

step-by-step

procedure

given

under CONYERGENCE

(cornplete

set-up)

and

(2)

rnake

only

the

adjustrnents

which

are

nec-

essary

to obtain

the

results

rnentioned

in each

step.

If

the

receiver

requires

only

a

touch-up,

the

adjustrnents

under

CONVERGENCE

will

be

easier to rnake

and

will take

less time.

BLACK

ond

WHITE

TR'ACKING

The

purpose of

the BLACK

and

WHITE

TRACKING

adjustrnent

is

to

produce

a

good

black

and while

picture within

the

usable

range

o{ the

Brightness

and

Contrast

controls.

If

this

adjustrnent

is

not

properly

rnade,

a

black

and

white

picture

will

appear

tinted

with

color

as

the Brightness

or Contrast

controls

are adjusted

and a color

picture

will

be

re-

produced

with

the wrong

colors.

Tune

in a

station

that

is transrnitting

black

and white

pictures.

Make

adjustrnents

as follows:

1. Turn

the

CONTRAST

CONTROL

cornpletely

to minirnurn.

Z.

Turn the GREEN

and BLUE

GRID CONTROLS

to

extrerne

left

(rninirnurn).

3. Adjust

the RED,

GREEN

and BLUE

SCREEN

CONTROLS

to

about Ll2

rotation

clockwise.

At these

settings

the

picture

should

be

red when

the

brightness

is

turned

up.

4. Adjust the

Brightness

control

until

the

picture

is

just

extinguished.

Poge

24

5.

Turn

the

GREEN

GRID control

completely

to

the right and

then reduce

the setting

until

the green

light

just

disappears.

6.

Repeat step

5 for

the BLUE

GRID control.

7.

If the

picture

appears

GREENISH,

turn

GREEN SCREEN

control very slightly

to the right.

Then

turn

GREEN

GRID control

to the left until

picture

is black and

white.

If the

picture

appears

BLUISH,

turn

BLUE

SCREEN control very

slightly

to

the

right.

Then

turn

the BLUE

GRID control

to the le{t until

the

picture

is black and

white.

If the

picture

appears

REDDISH, turn

RED SCREEN control

to the left until

pic-

ture is

black and

white"

8.

If

picture

is

sti1l

not

black and

white, repeat

entire

I'Black

and

\{hite Tracking"

proc

edure.

CIRCUIT

DESCRIPTION

VHF

TUNER

The

YHF tuner,

94D131-1,

features

high

gain

and

stability and

inherent

high signal

to

noise ratio.

Drift

has

been

rninirnized

by

the use of rugged

tuner construction and

ternpera-

ture

compensated

capacitors.

Sirnplicity

of

design

and

Printed

Wirlng will reduce

service

requirernents

to

a

rninirnurn.

Much longer

tube

life

is

rnade

possible

by the neutralized

triode

circuit. This

single

triode

has Iess

than

half

the dissipation

of a dual-triode

cascode.

A desirable feature

of the

tun-

errs circuitry

is

that it is

designed

to operate on a relatively

low

B-Plus

Voltage,

as 1ow as

125

volts,

thus assuring

longer

life

to cotrrponents and

tubes.

The 6BN4 is

used as a

neutralized

triode

RF

arnplifier.

The input

transforrner

T101

rnatches

the 300 ohm

balanced input antenna

lead-in to

the

unbalanced 75 ohrn input of the

trrner.

The signal

then is

applled

to two IF traps, one

paralle1,

one in

series.

These

traps

are

stagger-tuned

to

provide

optirnurn

IF

rejection

over

the

range frorn 4l

to

46

MC.

The

capacitor

C121

reduces

oscillator radiation.

f'rom

antenna

coil L102A, the

signal is

ap-

plied

to grid

of

the 68N4. AGC

bias is applied

to this

grid.

Capacitor Cl05

varies the

arn-

plitude

of

the

180

degree phase

shifted signal from

the

plate

circuit to

neutralize the

plate

to

grid

capacitance.

The output

of the

triode is rnutually coupled

to the

input tuned circuit

of the

pentode

Mixer 5CG8.

Cl08 tunes the

plate

circuit of the RF Arnplifier. Cl10

tunes

the

grid

circuit of the

rnixer stage.

rl

L(

The locaI oscillator

circuit

of the tuner is a conventional

Colpitts

circuit with

rrBookrr

fine

tuning. The fine

tuning

stator area in

the

plate

circuit is

printed on the board. A

hinged tin-dipped phosphor

bronze

plate

is separated by insulating tape

frorn

this

printed

atea.

FIence,

"Book

Tuning".

The

Fine

Tuni.ng control

provides a

tuning range

of.

frorn

Z

to 4.5

MC

on

all

VHF

channels.

L

(

'When

replacernent

ls

rnade of

feedthrough

capacitors

Cl)Z,

CL04,

C109, CLLZ, CI13,

CI15, exact

replacement

feedthrough

capacitors should be used.

Poge

25

TIIXER

IF COUPLING

NETWOR,K

The rnixer

IF

coupling

network

is

rnade

up of

four

tuned

circuits,

two tuned

to IF

fre-

quencies

(Ll05

and T201),

an adjacent channel

sound trap

(L202)

and

a trap

(L201) for

at-

tenuating

the

sound carrier.

The rnixer

plate

circuit

is luned to

4?.4

MC,

and

is

capaci-

tively-coupted

to the IF

input circuit

which

is tuned to

approxirnately

46.0

MC.

Capaci-

tance-coupling

is used to rninirnize

oscillator

radiation.

The trap

(L201),

tuned

to

41

.25

MC,

attenuates the

sound

carrler

approxlrnately 30

db to

prevent

the

herringbone

Pattern

on the

picture

tube

caused

by the

920

KC

beat

between the

sound

carrier

and color

sub-

carrier.

Cross

modulation

is the rnodulation

of the

desired

signal

by

an

unwanted

signal

or

inter-

ference

such as

adjacent channels. To

rninirnize

interference,

an adjacent

channel

sound

trap

(LZOZ)

in

the

rnixer-IF

coupting

network

provides approxirnately

46

db rejection

at

47.25 MC.

VIDEO

IF

CHANNEL

The

video IF

channel consists of

4 stages

of IF

amplification

using three

6B26 tubes

and

one 6CB6

tube.

The

channel

is designed

for a 45.75

MC

video carrier,

a

42.17 MC

color

sub-carrier

and a

41.25 MC

sound

carrier. The

first

and second

stages

are

tuned

to

the

video

and color sub-carrier

frequency

sides of

the

IF

response curve

(46.0

MC

and

45.1

MC)

so that the sound carrier

is kept

at a low

arnplitude

as long

as possible to

further

pre-

vent cross

rnodulation.

The third

stage is tuned

to

approximately

center

of the IF

response

passband

(43.2

MC)

and serves

as a

trtiltrt

control.

The

'rtiltI

is adjusted to

produce

a flat

response over the

passband of

approxirnately 4

MC

at

the 6

db

points on the IF

response

curve.

The

first, second

and

third IF

amplifiers

are controlled

by

autornatic

gain control.

To

further

rninirnize

cross rnodulation

the tubes

are of

rernote cut-off type.

The

screen

grids

on these three

tubes

are

rnade

{urther

rernote by using

a dropping

resistor in the

B

plus

line.

LUTIIINANCE CHANNEL

The

lurninance

(Y)

channel

function is

sirnilar to that

performed

in black

and white

re-

ceivers

--

that of

arnplifying

the lurninance

inforrnation to

the

required

arnplitude to

drive

the

picture

tube

and adjusting

the

peaking of the video

circuits

for

fine detail

in the

picture.

The

rrYrr

channel

consists

of the

lurninanie

detector,

delay line

and

one stage

of

arnplifica-

tion caIled Luminance

Output.

The

lurninance

detector

(CR20I)

is

a gerrnaniurn

diode

and is operated

at 7.0 volts

peak

output level.

A crystal

has

a rrrore linear

characteristic

resulting

in better

arnplitude

re-

sponse

for

the

gray portions of

the

picture.

Also, a

crystal

diode was

selected because

lts

physical size

provides easier

shielding

for IF

harrnonics.

The

srnall

diodes

have

less

shunt

capacity

providing less loss to

hlgh

frequencies.

Irnrnediately

following the

lurninance

de-

tector

is an

IF

bypass condenser

(C218) and

a series

rejection coil

(L20?)

tuned

to 43.5

MC.

These two cornponents

filter out

any IF or RF

signals that

rnay

have

passed through

the

lu-

rninance

detector.

Delay Llne- Slnce

the lurninance

signal

has

a wider

ovet-aIl

bandwidth

than the

chrorni-

nance channel,

it rnust

be delayed

in

order

to

insure

that the two

signals

arrive

at the

pic-

ture

tube

at

the

sarne tirne.

The lurninance

signal

thus

is

delayed

.8

rnicrosecond

in

the de-

lay line.

The

series

peaking

coil

(LZ10) in the output

o{

the

delay

line

is to rninirnize

reflections.

A modified bridged T

trap

(L211) foliowing

the

delay

line

provides

rejection

at 3.58

MC.

p.ZZ3,

4,300 ohrns

resistor, serves

as a detector

load,

a termination

for the

delay

line,

and

the

center leg

of

the

bridged T.

Poge 25

Lurninance

Outpg!,

V205

-The

single

stage

to

the picture

tube

cathodes,

thus

achieving

in

the luminance

amplifier

cathode functions

gain

and

bandwidth

in

the

plate

circuit

of the

used between peaking

coils.

LZBYT

lurninance

arnplifler

is dlrect-coupled

DC

restoration.

A

variable

resistance (R225)

as a

Contrast

control.

To

achieve greater

lurninance arnplifier,

rnutual inductance is

{

SOUND CHANNEL

The sound channel

consists of

and

audio output.

The

sound

and

video IF

transforrrer.

a

detector,

IF

arnplifier,

ratio

detector,

audlo arnplifier

chrorna are

taken frorn a separate winding

on the

{ourth

The 4.5

MC

intercarrier

beat is detected

in

the cornbination

sound and

chrorninance de-

tector.

The gerrnanlurn

dlode

used here is

the

sarne

as is used in the lurninance detector

stage,

Adrniral part

nurnber

93A8-1.

The input

transforrner (L301)

feeds

the 4.5

MC

sound

IF to the

grid

of

the

pentode

sec-

tion

of

a

6Ug tube, sound

IF arnplifier.

A

conventional

ratio

detector

stage

is used to

re-

move

the

audio

inforrnation

frorn

the

sound

IF

carrier.

The

remaining

triode

section of

the

6U8 tube

is

used as

the

first

audio arnplifier.

A

tapped volume control

(R308)

and

fre-

quency

cornpensation

network

in the

grid

circuit

provide

good

low frequency

response

even

at low settings

of

the

control

.

A rnanual

tone control

(R3

14) is inserted

ln

the

plate

circuit

of

the

first

audio stage.

The audio

output

consists

of

one 6Y6 tube.

CHROMINANCE

CHANNEL

The chrorninance section

of

the

color

receiver rernoves

the color

inforrnation

frorn

the

cornposite

video signal,

builds it up,

dernodulates it and

distributes

it in

proper proportions

to the

three

guns

in

the

picture

tube.

Several

stages work together to

perform

these

tasks.

Chrorninance Detector

-

A

gerrnaniurn

diode, Admiral

part

nurnber

93A8-1,

is

used

as

a

cornbination chrorninance and sound

detector. The diode is the

sarne

type

as

the

lurninance

detector diode.

Provisions

are

rnade

for

the

necessary

by-pass

and

peaking

networks.

A4.5

MC

bridged T trap

(L401),

located between the chrornlnance

detector

and first

chrorna

arnplifier, prevents

the

sound IF

frorn

entering the chrorna

channel. This trap

pro-

vides

26 db attenuation

to 4.5 MC.

Chrorna ArnpliIier.E

-

The three interstage circuits

in

the chrominance

ampliflers

are stag-

ger-tuned,

sirnilar

to video IF

arnplifiers,

to

provide

a

1 MC

flat bandpass. The two

high

elernents in

the

grid

and plate

circuits of the

first

chrorna

amplifiers

are

tuned to

4. I

MC

and

3.

1

MC,

respectively.

Figure l8a shows a typical

response of

two

such circuits"

The

plate

circuit

of

the chroma output has

a

slightly broader response

with less

arnplitude

(see

Figure 18b) and is

tuned to 3.58

MC,

approxlrnately

rnidway

between 3.1 MC

and

4. I MC"

The

three-stage

stagger-tuned response

is shown

in

Figure

18c, flat

for the fuIl 1 MC

band-

pass required

for

good

color detail.

The

input impedance of the

output

stage is lower than

the

output irnpedance

of the

first

chrorna

arnplifier.

Matching

is

accornpllshed

with the

2:1

turns

ratio

inter-stage

coupling

transforrner

T401. The chrorninance

output

is coupled

to

the

dernodulators

through capacitors

C4Z6

and

C427.

t

L(

?oge

27

3,58

+

,At

(o)

(b)

(c)

Figure

13. Typical

Response

curves

of Three

stagger-Tuned

circuits.

Four

voltages

are

present

at

the

grid of

the

first

chrorna

arnplifier.

Let

us

consider

each

of

these

voltages

individually:

A. The

chrominance

signal

,

containing

hue

and saturation,

is coupled

to

the

grid through

a

3.3

mrnfd

capacitor"

Due

to the

high

irnpedance

at low

frequencies,

this

capacitor

passes

only

sidebands

suppressed

3.

58MC

sub-carrier.

B. During

color

reception,

a

positive

pulse

frorn the

color

intensity

control

is coupled

to

the

grid

of

the {irst chrorna

arnplifier through

capacitor

C503

and coils

L402

and L403.

The

arnplitude of this

pulse

can

be varied

rnanually

by the

color

intensity

control

between

0 and

90

volts,

peak

to

peak.

The

bias

developed

at

the

grid varies

in

proportion

to

the

arnplitude

of the

pulse.

The

gain

of

the tube

varies

inversely

proportional

to the

arnpli-

tude

of the

pulse.

C.

During

black

and

white

reception

the Color-ki1ler

tube,

V401B,

conducts

and

provides

a

positive

pulse

to

the

grid of the

first

chrorna.

This

pulse,

approximately 80

volts,

peak

to

peak,

autornatically

accornplishes

the

same

result

as

described

in

steprrBil

above

in

the

absence of color.

D"

Aulornatic

Chrorna

Control

voltage

(cornparable

to

autornatic

gain control)

is the

fourth

voltage

applied to

the

grid

of the

first chroma

arnplifier

tube.

The

ACC

voltage,

de-

scribed

under

the heading

of Autornatic

Chrorna

Control

is

developed

in the 3.58

MC

phase d.iscrirninator

stage. The

arnplitude

of

the incoming

burst

determines

the

amount

of ACC

voltage

fed back

to

the

grid

as

gain control

voltage'

In

brief;

d.uring

color

reception,

the

first

chrorna

arnplifier

conducts

fully

during

hori-

zontal retrace

tirne

and

according

to the

selting

of

the

color

intensity

control

during

hor-

izontal trace

tirne" During

black

and white,

the

tube

conducts

only

during

horizontal

re-

trac e tirne .

Burst

Arnplifier,

V501B

-

The

color

trbursttr

signal

consists

of

8 to

11 cycles

of the

3"

58

MC

."rri."

*ua

in tha

b"t"nced

rnodulators

in the transrnitter.

Hence,

the

rrburstrrcon-

tains

the

sarne

frequency

and

phase as that

of

the

rnissing

subcarrier

and is used

in the

re-

ceiver

as

the Color

Synchronizing

signal.

This

color

sync

signal

appears

during

horizon-

tal

retrace

period

on

the

back

porch of the

horizontal

blanking

pulse.

The

color

nburstrr

signal,

arnplified

in the

first chrorna

arnplifier

tube

during

horizontal

retrace

tirne,

is taken

off

at the

interstage

coupling

transforrner

T40t

and

applied

to

the

grid

of

a pentode

burst

arnplifier

tube V50IB.

To

insure

trburstrr

separation

frorn

the

chro-

rninance

signal,

the

cathode

of the

burst

arnplifier

receives

a

negative

gating

pulse which

allows

the tube to

conduct

only

d.uring

the

horizontal

retrace

gating

pulse tirne.

The

arnpli-

tude

of the

gating

pulse is

approximately

45 volts,

peak

to

peak. The

arnplified

t'burstil

sig-

nal,

approxirnately

200 volts

peak

to

peak,

appears

in

the

plate circuit

and

is

developed

a-

cross

the

plate

load

coil, L50I.

This

"burst"

signal

is

applied

to

the

color

phase

discrirn-

inator

through

capacitor

C511.

f
E
I

o

1U

rp

Poge

28

Color

Phase

Discrirninator,

V50Z

-

The function

of

the color

phase

discrirninator

is

to

coryIpare phase

and

frequency

of

the 3.58

MC

recelver

oscillator

signal with

incorning burst,

the color

sync

signal.

The output

of

the

discriminator

in

the

forrn

of a

DC voltage is used

to

provide

automatic

frequency

control of

the

receiverts

3.58

MC

oscillator.

This

sarne out-

put

is used

to cut-off

the

Color

Killer

during

the

presence

of

color

burst.

An

add.itional

output

voltage is

used

to

control

the

gai.n

of

the lst chrorna arnplifier,

depending

upon the

level

of burst.

The inputs

to the phase

detector

consists

of a

Push-PulI

(Positive

and

Negative)

3.58MC

oscillator

signal and

the color

burst

signal.

On

a color

signal,

burst and

oscillator

inputs are

cornpared

in

frequency

and

phase,

"Positive

going"

3.58

MC oscillator

signal

to one

diode and

rrNegative

goingtr oscillator sig-

nal

to the

other diode

with the

burst signal

cornrnon to both diodes.

Each

diode

conducts

equally

when

the

phase

of burst

is

!0

degrees displaced

frorn

the

3.58

MC oscillator

signal appearing

at

either

cathode.

The 3.58

MC oscillator signals ap-

pearing

at

the

two cathodes

are,

of course,

of opposite

phase (180o).

lVhen the diodes con-

duct

equal1y,

therrvoltage

dropstracross

each diode load resistor,

R5Zl

and

R5ZZ,

are e-

qual

and

of

opposite polarity.

The

oscillator

control

tube,

Y5034,

requires

a srnall

value of operating

bias;

therefore,

the

oscillator

tank

coil

is adjusted

for

a

negative

six

(-6Y)

volts

at

Pin I cathode.

This sarne

negative

six

volts is applied

to the

color killer

tube

grid

to effect its

cut-off during

color re-

ception.

'When

the frequency

and phase

relationship

between

the

oscillator

voltage and

the incorn-

ing

burst signal

is

correct,

the

color

phase

discrirninator

supplies

norrnal

operating

bias

to

the grid

of

the

3.58

MC oscillator

control

tube,

V503A.

If the 3.58

MC

oscillator

increases

slightly

in frequency,

a

rnore positive

voltage

is developed

and

applied

to

the

grid

of the os-

cillator

control

tube.

This

will essentially

increase

the

capacitance

of the

control

tube

which

shunts

the

oscillator

tank,

thus reducing

oscillator

f.requency.

If the oscillator

frequency

d.e-

creases

slightly

below

3.58

MC,

a

more negative

voltage

is developed

and applied

to

the grid

of the

control

tube,

thus

decreasing

the capacitance

and

increasing

the frequency

of the

3.58

MC

oscillator"

ACC

-

Arrtornatic

Chrorna

Control

-

The

autornatic

chrorna

control functions

sirnilar

to

ar1

autornatic

gain

controt

on

black and

white receivers.

A negative

voltage deterrnined

by

the

arnplitude

of

the incorning

burst

signal

is fed

back

to the

first

chrorna arnplifier grid

to in-

crease

or decrease

gain

through

that

stage"

The

first

chrorninance

arnplifier

also

arnpli{ies

the

color burst which

i.s separated. frorn

the

chrorninance

signal

by rneans

of a

gated

burst

arnplifier

tube.

This

separated.

high-alti-

tude burst

is fed

to

the

phase

detector

where it is

cornpared

with

the output of

the 3.58

MC

oscillator.

The balanced

negative

output

of the

phase

detector

is

a

rneasure

of the relative

burst

signal

arnplitude;

this

control

voltage is

applied

to

the

first

chrorninance arnplifier

to

provide

Autornatic

Chrorninance

Control.

I

The

color intensity

control,

R

505, is a

rnanual

tive horizontal

retrace

pulse

applied

to the

grid

of

the chrorninance

arnplifier

varies inversely

as

the

burst

output

rernains

nearly

constant.

chrorninance

control.

By

varying a

posi-

the

first

chrorninance

arnplifier,

output

of

arnplitude

of the horizontal pulse

while

the

3.58

MC

Oscillator

Control

V5O3A

-

The 3. 58

MC Oscillator

Control tube is used

to

cor-

MC

oscillator.

The

arnount

of frequency

or

rect

the

frequency

or

phase

drift

of the

3.58

poge

29

phase

correction

depends upon the

amount of voltage

developed

by

the

phase discrirninator

tube.

The

phase

d.iscrirninator

develops correction

voltage

in

proportion

to the

arnount

of

frequency or

phase

drift.

The

correction

voltage is

applied to the

grid

of

the control

tube.

A

positive or negative

change

in

grid

voltage

will

result

in

an

increase

or decrease

in

plate

current,

in turn

re-

sulting

in a

decrease

or

an

increase

respectively,

in oscillAtor

frequency. This

systern

provides

very

accurate stability.

3.58

MC Oscillator,@-The

3.58

MC

voltage

is

produced by

a

crystal

controlled

os-

"iti"tor,

the

pentode section of

a 6U8. The

crystal is

connected

between

the

grid and

screen.

Electron

coupling

to the

plate produces

sufficient

signal

in the

plate

circuit

of the oscillator

to

drive

the

phase

discrirninator

and the triode

dernodulators.

Transforrner,

T502,

in the

plate

circuit

provides

such

signal voltages.

Chrorninance

Dernodulators,J!!!

-

Two triode

color

dernodulators

of

high

arnplification

are..s"i[ to

derrrodrrlate R-Y,

B-Y

and

G-Y

frorn

the chrominance

signal' This

high

leve1

type of

dernodulator

provides

adequate output

to

drive

the

picture tube

directly

with

good

linearity,

DC

stability,

and independence

of tube

characteristics.

The

chrorninance

signal

is fed

at high-arnplitude

to the

plate while the

3.58 MC

signal

is

applied to the

grid. The

grid circuit

is self-biased

and

driven

with

sufficient

voltage

to'as

-

sure class

C

operation. The

plate receives

adequate chrorna

signal to

drive two

of the

three

guns in

the

picture

tube

plus a srnaller

arnount

that

is subtracted

frorn

the

plate circuit

and

taken

off of the

cornrnon

cathode

to drive

the third

gun"

This

circuit

takes

advantage

of the

fact that the

G-Y

signal

requirernents

are

the

srnallest

of the

three

color

difference

signals,

and. that the

G-Y

can be rnade

up

of the

negative

of

R-Y

and

B-Y

since

G-Y= -.51

(R-Y)

-.19

(B-Y).

The G-Y

signal

produced in the

cathode

circuit

subtracts from

the B-Y

and

R-Y

sig-

nals

produced in

lhe

plate

circuit. Therefore,

sufficient

chrorna

drive rnust

be

applied to

the

plates

to

produce

the

cathode signal

as well

as

the

plate signal

.

To

etrirninate the cross talk

between

R-Y

and

B-Y

which

would

norrnally

exist

due to the

cornrrron cathode irnpedance, the R-Y

and

B-Y

dernodulating

reference

voltage

angles

are

rnoved toward each

other

frorn

their

quadrature

(90o

separation)

position

to cancel

out the

introduced cross talk. The R-Y

dernodulator

axis

is

rnoved I2.

t

degrees

away frorn

R-Y

in

the direction of B-Y. The B-Y

dernodulator axis is rnoved

13.5

degrees

away frorn

the

B-Y

in the

direction

of

R-Y.

Total

separation o{

the

dernodulator

axis is 63.6

degrees.

The operation

of the high

level

color

dernodulators

differ

frorn the well-known

diode de-

tectors

used

in

black

and

white

TV

and in the color set, to

obtain lurninance

inforrnation

frorn

the rnodulated carrier. There

are

two

reasons for this

difference.

l.

Z.

To

obtain

three

outputs

(red, green, blue)

frorn

one

signal it

is neces-

sary to

detect

the

signal

at phases, other lhan the

carrier. Two

sig-

nals

are

detected

(R-Y

and

B-Y)

and

the

third

(G-Y)

is developed

by

adding together

portions of the

first

two

signals

detected.

As

a result red,

greerr and bLue are not detected

in the

color dernodulators,

but

R-Y

'

B-Y

,

and

G-Y

where

Y

represents

the

black

and white

or lurninance

signals.

Use

isrnade

o{

the

picture

tube

to

add

together

the

chrorninance

information

received frorn the

color detec

Color

inforrnation

is

transrnitted

by

in order to

detect these signals

it is

the

receiver.

This

carrier rnust

be

color carrier transrnitted.

a suppressed

carrier

systern

and

necessary to

supply

a carrier

at

synchronized

to

burst, the

only

Poge

30

tors,

and the

lurninance inforrnation received from ihe luminance

arnplifier

to

produce

the

final red,

green

and

blue signals.

This

is done

by DC coupling the

black and white

inforrna-

tion to

the three cathodes of

the

picture

tube,

while

the three

outputs of

the

color

dernodula-

tors

are

DC coupled to the

respective grids

of

the

picture

tube.

The

chief

requirernents

for proper

operation of the

dernodulators

are--

I. The correct ratios

between the separate

plate-load

resistors

and

the

cornrnon

cathode

re sistor.

2.

The correct

phase

relationship between the two

reference

CW

signals

which

are applied

to the

grids.

Detection

of

the chroma

signal is accornplished by causing the

two triodes

to

act as grid

controlled

rectifiers.

The 3.58

MC

sine wave

voltage

frorn

the crystal

controlled

subcarri-

er

oscillator is applied between

grid

and

cathode

of the

R-Y

detector. To

detect

at

correct

phase

for

the

B-Y

detector,

a

two stage

phase

shift network is used. This

network delays

the subcarrier applied to the

B-Y

detector so that correct outputs

are

produced.

This

C\tr

voltage is

great

enough so that the

dernodulator

tubes

operate class

C;

that

is,

each tube

draws

current

for

only

a

very

short

tirne

during each cycle. Thus,

the tubes

oper-

ate"as switches,

turning or'). once each cycle. The

bias on

the

tubes

is

deterrnined by

grid

conduction,

and

by the

parallel resistance-capacitance network in each

grid.

The

series

resonant coils

L407, L408

and

L409

{ilters the

3.58 MC

component

in

the

output circuits.

Phase Shift

Network,

MM

-

Since

one of the two chrorninance

dernodulators

requires

a

phase

difference signal,

a

phase

shift network is used to

provide

the exact

arnount of

shift.

One

of the secondary windings

on the 3.58 MC

oscillator output transforrner,

A502,

supplies

the

3.58

MC

signal to

the two

dernodulator

stages.

One

dernodulator, V403A,

receives the

3.58

MC

signal direct;

the other

dernodulator,

Y4038,

receives

the

signat

that

has been

de-

layed. A two-section low-pass filter

having

a 560

ohrns

characteristic

irnpedance

provides

63.6

degrees

phase

shift,

The

use oftwo-sections rnakes the

value of

circuit cornponents

less

critical

and

irnproves

stability.

Only

one

adjustrnent is

reguired to obtain

63.5

degrees

relative

phase

shift;

see

Phase Alignment

on

page

48.

Pulse Shapgl,

V50lA

-

The

purpose

of the

pulse

shaper

circuitry

is

to

narrow the

positive

gating pulse

which is

applled

to the first chrorna

arnplifier,

Y40lA.

If

the

pulse coupled to

the

first

chrorna

arnplifier

is too wide,

it

rnight carry over

into

chrorna tirne

which would

distort

the chrorna

inforrnation

appearing on

the

left

side of

the

plcture.

The

pulse

shaper

tube

is a cathode follower. The

grid

leak

provided

places

the

operati.ng

point

o{ the tube at

cut-off

until

the

positive gating

pulse

applied to

the

grid goes sufficiently

positive

to

cause conduction. Thus the

positive

pulse at

the

cathode will

appear

only

during

this

shorter tirne.

This

is because

the

gating pulse is

progressively narrower

as it

ap-

proaches

its

positive peak.

Color Killer,

Y![lE-

The function

of the color killer circuitry

is to

disable the

first chro-

rna arnplifier during

black.and

white

reception

so that no video

will

pass

through

the

chrorna

channel

to cause color contarnination

of the black

and white

picture.

Another

function

of the

color

killer is

to

pulsdthe

first

chroma

arnplifier

into conduction

only during

burst tirne

so

that the chrorna channel

is

always

tropentrwhen

burst is

present

(during

color transrnission).

A

negative going pu1se,

taken frorn

a winding on the horizontal

output

transforrner,

is

applied

to the

grid

of the

color

killer tube.

The

positive pulse appearing

ln the

plate

cir-

cuit

(during

black

and

white transrnission)

is applied to the

grid of the

first chrorna

arnpli-

fier.

This causes the

first

chroma

arnptifier to conduct

during the

burst

time interval.

The

chrorna arnplifier

is then cut-off because of

grid current

flow which

develops

a

cut-off

bias.

t

L(

\-{

a

)

I

I

I

I

I

I

o

@
@

o

0

ru

Poge

3l

BI'RST

-(

E-Yl

Figure

14.

Vector Diagrarn

Showing

Relationship

of Axes.

Demodulator

Axes

Shown in

Heavy

Lines.

Due

to the long

RC tirne constant

in

the

grid

circuit, the tube

rernains cut-off until

the

next

pulse.

The

arnplifier is

held beyond cut-of{

(during

scan

tirne) untl1

another

pulse appea?s

(during

retrace

tirne).

Thus

no

video

passes

through the

chrorna channel

during

black

and

whlte

transrnission.

'When

color

burst

is present at

the input of the color

phase discrirninator,

a DC voltage,

negative

polarity,

is developed at pin

#l

cathode

of the color

phase discrirninator. This

voltage

supplies

norrnal

operating bias to the 3.58

MC

oscillator control

tube,

and cut-off

blas

to the color

killer

tube.

Thus

the

color killer is cut-off

during

color transrnission

and

will

not disable the

chrorna channel.

The

first

chrorna

arnplifier

conducts

during

color transrnission

and

conducts

only during

retrace

tirne during black and white

transrnissions.

The

color

killer

conducts

during black and

white transmission

(retrace

tirne

only)

and

is

cut-off during

color transrnis

sion.

-

(R-Yl

J

Poge 32

AGC- A

gated pentode

circuit

provides

autornatic gain

control

bias

for

the

grids

of

the RF

and first

three

IF

arnplifiers,

based on the lransrnitted sync

pulse

level. The

grid

of

the

gated

AGC tube,

Y206,

is

supplied with

the cornposite video signal voltage

frorn the

output

of the video arnplifier by direct

coupling

through

isolating resistor,

R605.

Pulsed

plate

voltage of 500

volts

peak

to

peak

developed during

horizontal

retrace

tirne,

is obtained

frorn

a winding

on the horizontal

output

transforrner

and is

coupled to the

plate

of the

AGC tube

through capacitor,

C603. Since DC voltage

is not applied

to the

p1ate,

the AGC

tube

con-

ducts only during

the horizontal

sync

pulse

interval.

The

amount

of

plate

current conduc-

tion during

this interval depends upon

the

arnplitude

of the transrnitted

sync

pulse and, in

turn,

determines

the

arnount

of

AGC voltage

developed by

the AGC

tube. The

transrnitted

sync

pulse

arnplitude

is

used to

deterrnine

the

arnount

of AGC

bias developed because this

is

a

constant

arnplltude

with respect

to the transrnitled carrier,

representing 100/o of carrier

power.

If the

average

composite video signal were used to deterrnine the

amount of AGC

blas, the

AGC bias

voltage would vary with changes

in

the

average

picture brightness being

transrnitted.

An AGC voltage divider,

rnade up of

R604,

R2

14

and

RZl6,

supplies three

different arn-

plitudes

of bias; first and

second

IF AGC

is approxlrnately

twice

that of the

third IF

and the

tuner AGC varies

widely

as

iacorning signal strength

varies. On

a

strong

signal,

tuner AGC

rnay

be several

tirnes

Lhat

on

the

IF

stages.

On

a weak signal,

tuner AGC

is below that

of

the

IF

stages

to

provide

better signal-to-noise ratio

through the tuner,

resulting

in less

snow in

the

picture.

A slightly

positive

voltage is applied

to

test

point'rU't

that cancels

part

of the tuner AGC

providing

rnore signal

gain

in

weak

or interrnediate

signal

areas.

This

srnall

positive

voltage

is

called

"Delay

Voltage't.

ErcS_Se,p"r"t""

""a

N"i""

l,l

,-y6.!.L-

This circuit

is

used

to

irnprove sync stability in

nolsy

slgnal

areas by

elirninating

noise

pulses

that

occur during vertical

and

horizontal

sync

pulse

intervals.

The cornposite

video

signal is applied

to

the first

and

thtrd

grids

of the

sync separator

tube, 5CS5.

The

signal

on the

first

grid

(pin

l)

ls

negative (negative going sync

pulses) and

is

obtained

frorn

the

grid

of the video arnplifier

through a 47

K

resistor,

RZZZ.

This

signal

is

the

sarne

as

the output from

the video

detector.

The

signal on the third

grid

(ptn

7)

is

positive

and

is obtained frorn

the output of the video

arnplifier.

The

amplitude of this

sig-

nal is rnuch larger

than that on

the

first grid and

is 180 degrees

out

of

phase.

The

negative

AC

and

DC voltages,

developed across

video

detector load

resistor,

RZZ3,

are applied

to the

first grid (pin

1) of the 6CS6 through

an

isolatlng

resistor,

RZZZ,

47,000

ohrns.

The

first grid

ls so

biased

by this

voltage

and

the

positive

(bucking)

voltage

frorr.r

the

385

volt

supply

through the 2.2

rnegohrn resistor,

R610,

that

any pulse greater

than

the

arnpli-

tude of the sync pulses

will cut

the

tube

off and prevent

these noise

pulses

frorn

entering the

synchronizing

circuits and

triggering

the

vertical

and

horizontal oscillators.

If

a nolse

pulse

is superirnposed

on

lhe

sync

pulse,

the action of

the circuit will

elirni-

nate

both

the noise

and

sync.pulses.

W'hen

sync pulses are

lost in this

manner, the

,'fly

wheelrreffect

of

the

oscillators

will

keep thern synchronized

untll the next sync

pulse

ar-

rives.

Capacitor

C607

provides

coupling

to the

grid

of

the

Slmc Inverter Stage.

9ygg_I.rurt*,

V60ZA

-

The negative

going

sync

pulses

frorn

the

plate

of the

slmc

separa-

tor are

applied

to the grid

of

the sync inverter.

Due

to

the

high

value

of

grid

leak resistance,

R618,

and sorne

cathode bias,

the

sync in-

verter also

operates

as a

sync

clipper.

Negative

going sync

pulse peaks

drive

the tube to

cut-off,

resulting

in sync

ctipping

or arnplitude

lirniting

action.

{

t

(

L{

poge

33

Negatlve

going

clipped

sync

pulses

frorn the cathode

of the

sync

inverter

are

applied to

a

cathode

of

the

sync discriminator through

a

coupling

capacitor,

C609.

Positive

pulses

of

approxirnately equal

arnplitude

are taken

from

a

voltage

divider

con-

sisting of

resistors R6l5

and

R616

in

the

plate

circuit

of this

stage

and are

applied to

a

plate

of the

sync

discrirninator

through

a coupling capacitor,

C508.

The

coupling

capaci-

tors

are

low in value

to

reduce

feed-through

of the vertical

sync

Pulses.

Color

Stripe

Tes.!

-

A

test

point is

provided on the

rear

apron of the

color

chassis

to

test

fr,

.-r1.,

"eception

in those

areas where

a color

stripe

ls transrnitted

during

black

and white

transrnission.

This

stripe

as it is transrnitted

consists

of

a

few

cycles

of 3.58 MC

at burst

phase.

This

color

inforrnation

occurs

{or

a short

tirne

just

after horizontal

btanking

and

for

a

short t1rne

just

before

blanking.

'When

the

capacitor

C6

14

is

grounded

to

the

chassis,

horizontal

sync

pulses

are

delayed

just

enough

to

cause

the

burst

arnplifier

gating

prrlse to

appear

at tirne

coincidence

with

the

color

stripe signal. This

delay

also causes the

raster to

shift to the

left

perrnitting the

vertical color

strip

to

be

seen on

the

right side of the

picture.

The

color

stripe

will

ap-

pear yellowish-green when the

Color

Fidelity Control

is

set

properly.

Correct

reproduction of

this

color

strlpe

indicates the

color

clrcuits ln the

receiver

are

functioning and that

color

prograrns

should

be faith{ully

reproduced.

Also,

good reProduc-

tion

of

the

color

stripe indicates

a satisfactory

antenna systern for

color

broadcasts.

Vertical

Osclllator

and

Discharge,

V602B

-The

vertical

sweep

oscillator

is

a

rnodified

rnulti-vibrator. I eedback

voltage

to sustain

oscillation

is

fed {rorn the

output

of

the verti-

cal output

amplifier

tube,

6AQ5.

Vertical

sync input is

frorn

the

plate

ol

Y602A,

sync inverter

and

clipper

stage. This

positive

slmc input

is applied

through

the

single-section

integrator circuit, R628,

C6I7,

to

the

grid

of

the

vertical

oscillator. Variable

resistor,

R540,

the

height control,

varies

the

plate

voltage

that

is applied to the vertical oscillator

tube

and so

deterrnines

the

arnplltude

of the

oscillator output.

Vertical OutpS!-,

V503

-The

vertical sweep

arnplifier, 6AO5,

provides

the

necessary

volt-

ige foi

veitical

deflection. This

tube is transforrner

coupled

to

the vertical

yoke deflection

coils.

Yoltage

taken

off

at

the cathode

of the tube

is used

for vertical

convergence.

This

voltage is

applied

to the vertical

arnplitude control circuits

and

to the

DC convergence

cir-

cuits.

Yoltage

frorn

three

separate secondary

windings

on the vertical

output transforrner

is

applied

to

the vertical tilt

control circuits.

Horizontal Sync

Oiscrirninator, C

-

The

horizontal

sync

discrirninator

is

a

dual

seleni-

um

diode so

connected

to

provide

positive

and negative outputs.

Balanced

sync

pulse

voltage i.s

applied

to the

plate

of

one

diode

and

the cathode

of

the

other;

positive

to the

plate and negative to the cathode.

A

comrnon

reference

voltage

frorn

a winding

on

the horizontal output transformer

is fed through

an

RC

waveshaping

network to

the

rernaining plate and

cathode

of

the

sync

discrirninator. The

two DC

outputs'

one

posi-

tive

and one negative, are developed

across equal values

of load

resistors, R6Z0

and R621,

and

the

difference

voltage

appears

at

the

junction

of

the two

resistors"

The

discrirninator

develops

a

DC

voltage

across Ftb22,4.7

megohrn

resistor,

that

is

proportional to

the

phase

difference

(by

cornparison)

between

the

transrnitted

sync

pulse

voltage

and

the horizontal

sweep

reference

voltage. When

the

{requency

and

phase

relation-

ship between the

two voltages

is correct,

the

sync

discrirninator

supplies

norrnal

operating

bias to the first triode section

of the horizontal

oscillator.

When

a

change

in

phase

or

fre-

Poge

3f

quency

relationship

between

the

two occurs,

the DC output

voltage

acros

s

F.6Z? changes ac-

cordingly.

This

change in

DC bi.as

on

one

section

of the horizontal

oscillator

rnakes the

necessary phase

or frequency

correction.

This

Autornatic

Frequency

Control Voltage

(Af'C)

is

filtered

by

C6i0, C6II

and

R623 to

prevent

noise

pulses

frorn reaching

the

oscillator

grid.

Horizontal

Oscillator,_89.4.- The

horizontal

osciltator

is

a

rnodified

cathode

coupled

rnul-

tivibrator"

Oscillator

feedback is

provided by

ihe

cornrnon

cathode

resistor

R648

and

plate

to

grid

coupling capacitor C628.

The oscillator

frequency is

partially

determined

by the

slug-adjusted

coil

L601

and ca-

pacitor

C626.

The

slug

adjustment of

L601

is

the Horizontal

Lock

control

and

functions

as

a coarse

frequency

adjustment.

The RC

time constant

of

C628,

R649,

R650

and

C631

also

deterrnines the oscillator

frequency, and variable

resistor

R650

is used

as a fine frequency

or

Horizontal

HoId

control.

Capacitor C629

and resistor

R651

form

a

waveshaping

network

to

develop

a saw-tooth

waveforrn

frorn

the output

of the horizontal oscillator. Capacitor

C6Z7

bypasses

unwanted

high

frequencies from

the

plate

of the horizontal

oscillator that

rnight

cause

horizontal

in-

stability or bending

at

top

of

picture.

Variable

resistor

R648

varies the

plate

voltage

of

the output

section of

the horizontal

os-

cillator

tube

and

consequently

deterrnines the

arnount of

drive to the

horizontal

output

stage.

This

variable

resistor

is the

Horizontal

Drive

control.

Horizontal

Outp"!:

V605

-

A beam

power

arnplifier tube, 6CB5A,

in

the

horizontal

output

circuit has the rnultiple

function of

providing

driving

power for

horizontal

deflection,

the

high voltage

pulses

for

the

focus and high voltage

rectifiers, and voltages

for

the

dynarnic

convergence

circuits.

The

horizontal

arnplifier

is

auto-transformer

coupled to

the

horizon-

ta1

deflection coils,

as

well

as

the

focus and high voltage

rectifiers.

Voltage

for

the

DC

convergence

circuits

is supplied from

the

cathode of the 6CB5A. Secondary

windings of

the horizontal

output

transforrner, T502,

suppLies

pulsed

voltages

to

the horizontal dy-

narnic

convergence

circuits,

horizontal

phase discriminator, AGC tube,

pulse

shaper tube,

and

the color kil1er

tube.

relatively

high voltage

pulse

from

a

tap on

the horizontal output

transforrner.

The

AC

input

to the

plate

of the

IVZ tube

is

controlled

by

R659,

which

serves

as

a focus voltage

control.

I

I

t

,

L{

The

high

voltage

interlock,

Ild602,

is disconnected when the

safety

glass

is

rernoved.

This

disconnect rernoves

the

screen

grid

voltage

frorn

the

horizontal

output tube,

thus

dis-

abling

the

high

voltage

supply.

Darnper,

V606

-

The two

purposes

of the

darnper

tube

are

to

suppress

oscillation in the

hor-

izontat deflection

yoke

circuit,

and

to

increase the

plate

supply voltage

for several

circuits

in

the

television chassis.

The

connections

of the horizontal

output transforrner T602,

are

such that the DC Plate

supply

and

the horizontal

sweep

voltage

are

in series. Conduction

of the

darnper

tube

causes the voltage

at

the cathode to

rise.

This

increased voltage

exceeds

the

B

plus

volt-

il

age by

about

330

volts

and is called

the

'tBootstrap"

voltage. This

voltage

is

also known

as

I

rrB

Boosttr. Bootstrap voltage

supplies

the

horizontal output

tube

and other stages

in the

re-

|

ceiver with

a

voltage that is higher than the voltage

delivered by the

conventional

low voltage

power

supply.

The

horizontal linearity control,

L610, in the

plate

circuit varies

the

wave-

forrn of the

current

flow

through the

darnper

tube

and conseqluently through

the horizontal

de-

flection

coils,

resulting

in

a

change

in

linearity.

Focus Yoltage Rectifier,

V607

-

The

Focus Volt4ge

Rectifier

tube,

1V2,

plate receives

a

L{

t

Poge

35

The DC output voltage which is applied

to

the focusing

anodes of

the

picture

tube

can be var-

ied frorn 3000

to 4500 volts.

Hig@ge

Rectifier,_y6.9.9.-

The

high side of

the

horizontal output

autotrans{orrner sup-

plies

the high

voltage

pulses

to

the

plate

o{

HY

rectifier

tube,

type

3A3. The

full

DC output

voltage of20,000 volts

is applied

to the ultor

ring ofthe

picture

tube.

The

filter capacitor

consists

of the metal bell of the

picture

tube

acting as one

p1ate,

the

t'Bootrras

the dielec-

tric,

and

the

outside

conductive surface of

Boot

as

the other

plate.

The

inside of

the

boot

also has a

conductive

surface.

The total

effective capacity

in the high voltage

circuit

is

1,500

mrnf.

Shunt Reg@,-@,

-

The high voltage

regulator tube, 6B.K4,

is

connected

between the

20,000

volt output of the

HV

rectifier

V608

and

380 volt B

plus.

A

fixed

resistance bleeder

network,

R6??

and

R680

between Bootstrap

voltage

and

ground

supplies

a fixed

positive

volt-

age to the

grid

of the

regulator

tube to

provide

a rrleans

of setting the high voltage

leveI.

The

circuit acts as a

voltage

regulator to the extent that

as

the

grid

voltage

increases

or de-

creases

the

regulator

tube

conduction increases or

decreases, thus

regulating the

high

volt-

age

DC. This

increase

or

decrease

of the

high voltage DC is caused

by

different

bright-

ness levels

of the

picture

tube

(more

or

less bearn current).

Low Voltage

Rectifiers,.@I,

Y702 - The

low voltage

power

supply

consists of

T701,

the

Power transforrner,

two type

5U4GB rectifiers,

(connected full wave-parallel)

and

the

fi1-

ter

C703A, L70l

,

C704A, R703

and

C7048.

A two

arnpere

fuse

is connected

between the

high

voltage secondary

center-top and ground.

The

basic

supply delivers DC

output

of

385

volts and

300

volts.

The

total power

consury!.ption of the

29Zt

Color

TV

receiver

is 380

watts.

Convergence Circuit

-

Parabolic

waveshapes

are

provided

for both

vertical

and horizontal

convergence.

A

vertical saw

tooth is obtained

frorn the cathode

of the vertical output

tube,

6AO5.

This

voltage

is applied

across

the

vertical windings

of the convergence

yoke

which

integrates this

voltage into

a

parabola

of current. Vertical

tilt

is

provided by

a

saw tooth

of

voltage

frorn

the

vertical output transforrner.

The

horizontal

parabola

is obtained by

doubte integration

of

a positive horizontal

gating

pulse

frorn the

horizontal

output transformer.

Inductances

are used to control

both the

arn-

plitude

and

the tilt of the horizontal

parabola.

t

I

Poge

36

LI

lrJ

v

o
o

F

g

lrJ

Y

UJ

o-

o

o

lr.,

(9

F

al,

L

<d

-o

o-

E

q.1

5o

Lt

IJ

t

I

trJ

F@
of

-F

(L

EEH

rd0l

F

o

v

F

z

o

U

J

u.ro

OE

<F

tz

(Lo

o

oo

Gt-

lrJ

=

:d

6c.

oo

F

F]

EL

lr,l

F

>l

o

ElrJ..

a<9

oro

o&

9).

uJ<

OJ

L

trJ

@o

cA

O

trl

J.J
OJ

oi

frF

i<

o.A64

o=

F

zYlgJ

l=

o

33

L{

Figure

15.

Block

Diagrarn o{

Z9ZI

Color

TV

Chassis.

Page

37

I

Figure 16.

Sectional

Identification of

Circuits.

Poge

38

ALIGNMENT

Cornplete

alignrnent

consists

of

the

(I)

Video

IF

and

TraP

Alignrrrent

(Zl

IF Response

Curve

Check

GENERAL

following

individual

procedure

s.

(3) Tuner

Alignrnent

(4)

Sound

IF Alignrnent

(5)

Chrorna

Alignrnent

(6)

Sub-carrier

-

Color

Sync

-

Color

Phase

Alignment

TEST

EQUIPMENT

To

properly

service

this

color

receiver,

it is

recornrnended

that

the

following

test

equlp-

rnent

be

available.

IMPORTANT:

Many

service

instrurnents

do not

rneet

the

reguirements

given

below'

Additional

test equiprnerrt

is

needed

{or color

receiver

alignment

and

adjustrnents

and their

requirements

are more

critical

than

for

black

and white

TV

servicing.

A

list

of

recoro-

rnended

equipment

is

available

frorn

your

Adrniral

distributor.

{

oSctrLoScoPE

standard -

but

with

flat vertical

frequency

response

(wide

band

deflection)

MC;

vertlcal

sensitivity

at

least .1

volt

(RMS)

per

inch'

Note:

MoEt

oscilloscopes

have

a

vertical

frequency

response

to

about

I.5

oscilloscopes

are not

suilable

for color

circuitry

alignrnent

although

they

are

for

black

and

white

receivers.

SIGNAL

MARKER

GENERATOR

4.5 MC

frequencY

38-50 MC

frequency

range

50-90

MC

frequency

range

L70-ZZ5

MC

frequency

range

Must

have

a

calibration

crystal

for

checking

dial

accuracy'

SWEEP

GENER.ATOR.

The

sweep

generator

rnust

provide

sweep

frequencies

frorn

38

to

50 Mc,

50

to

90

Mc'

and

1?0

to

zz5 MC.

The

sweep

width

rnust

be

at least

10 MC.

The

output

rnust

be

adjust-

able

with

at least

one

tenth

of

a volt

rna^r<irnurn.

The

output

irnpedance

should

be 300

ohrns

balanced

to

ground.

A

sweep

generator

not

having

constant

output

voltage

over

the

swePt

range

and linear

sweep,

will

produce

curves

which

are widely

different

frorn the

ideal

ctrrves

shown

in

the

following

pages. If

repeated

difficulty

is encountered

in obtaining

these

curves,

the

sweep

generatJr

should

be checked.

A

sirnple

check

is

to observe

the

response

culve

for

a set

that

is in

alignrnent.

Before

suspecting

the

generator,

be sure

the

alignrnent

instructions

in this

manual

have

been

followed

carefullY.

to

at least

3.6

MC.

These

sati

sfactory

I*l

VACCUM

TUBE

VOLTMETER

Preferably

with

low

range

(3 volts),

with

a high

voltage

probe

(30,000 volts

DC

zero

center

scale.

It

should

also

be

equipped

range)

for

other

adjustments

and

serviclng'

\,{

U

{

Poge 39

COI.OR

BAR

GENERATOR

A

Color

Bar Generator

is

needed for

Color Phase Alignrnent,

and for

troubleshooting

color

circults.

It

is preferred

that the

generator

produce

signals

according

to

NTSC

Stand-

ards.

The following

outputs are

required:

a.

Vari.ety of

color bars, preferably

of

prirnary

and

complirnentary

colors.

b.

Bars representing

R-Y

and

B-y.

c. 4.5

MC

carrier.

The

generator

rnust be

crystal

controlled

for stability.

The outputs

rnay

be

of

RF

or

video frequenciesl

facilities

for

both are

desirable.

WHITE DOT

GENERATOR

A

White Dot

Generator

(such

as

ADMIRAL

Model TE-100)

is

needed

for

adjustrnents.

The

Generator rnust

produce

stable, srnall size dots.

Model

duces

either dots,

or vertical

bars

or horizontal

bars.

ATIGNTIIENT TOOTS

Non-Metalltc (FIBER)

Screwdriver

-

16 inches

long

-

llA

inch diarneter

#98A30-r9.

Non-Metaltic-Alignrnent'Wrench

-

9

inches

long, for

Hexagonal

Core

IF

part

#98A30-LZ.

convergence

TE-100

pro-

-

Adrniral

part

Slugs

-

Adrniral

Non-Metallic

Alignrnent'Wrench

-

9

inches

long, for srnall

Hexagonal

Core

Slugs

-

Ad-

rniral part

#98430-14.

B!A5

SUPPTY

O

-

4.5

Volts

(battery

or

electronic).

0

-

l5

Volts

(battery

or

electronic).

Figure

I7.

Top

of

Tuner

Showing Alignrnent Adjustrnent

Locations

and

Test

Points.

TUNER

ATIGNMENT

Be{ore

aligning

the

YHF

tuner, the

IF

arnplifier

including

the converter

plate

circuit

should be checked

and

aligned,

if necessary.

1.

Connect YHF

sweep

generator

and rnarker

to the antenna

terrninals.

Poge 40

2.

3.

Set

the

tuner

channel

selector

and

sweep

generator

for channel

2' Set

rnarker

to

channel

2

sound

(59.75

MC).

.l

Construct

a

decoupllng

network

shown

in

across

test

point

V,

Lurninance

Detector

indicated.

Connect

4 volt

bias

supply,

negative

to

test

poin!

T,

to chassis.

heavy

lines

in Figure

ZZ

and

connect

Load.

Connect

test

scoPe

to

Point

on

IF

AGC

bus

s,

positive

4-

5.

6.

Connect

3

volt

bias

supply,

negative

to

test

point IJ,

on RF

AGC

buss'

positive

to

chassis.

CAUTION:

The

output

controls

of

the

sweep

and marker

generators,

and verti-

cal

gain control

of

ite

scope

should

be

adjusted

to

prevent

overloading

of

the

re-

ceiver

or

scope.

If

the

waveforrn

shape

changes

when

either

control

is

advanced'

an overload

condition

exists.

In

this

case,

reduce

sweep

output

or

scope

gain or

both. Marker

pip

should

be

barely

visible'

set

Fine

Tuning

control

at center

position.

The

sound

carrier

rnarker

should

now

appear

in

the

sound trap.

If

not,

adjust,

starting

frorn

channel

2 through

13,

oscillator

coil

slug

to

positionthe

sound

carrier

rnarker

in the

sound

trap'

Before

adjusting

each

channel

slug,

set

sweep

to

appropriate

channel'

and

rnarker

to

corresponding

sound

carrier

frequency'

Set

tuner

channel

selector

to

channel

10.

Adjust

the RF-plate

trirnrner

A1'

and. rnixer

grid trirnrner,

AZ

for

flat

response

and the

video-carrier

rnarker

appearing

o

au

(so%)

down

from

the

peak

of the

overall

response

curve

as shown

on-Figure

18.

The

RF

tilt

should

be

no

gleater

than

2

db

1

Z0olo\

lor

all

chan-

nels"

The

valley

(dip

between

peaks)

should

not

vary

I11ore

t]nan

zoolo

of the

total

arnplitude

of

the

curve.

See

Figure

18'

TUNER.

NEUTR

ALI

ZAII

ON

AD

J USTilTENT

Set

tuner

channel

selector

and

sweep

generator

to

channel

10.

Increase

RF-Bias

to

a voltage

just

before

cut-off

of

the

RF

tob.,

and

at the

sarne

tirne

increase

the

sweep

input

signal

to

rnaintain

2 volts

peak to

peak

at test

point Y'

This

condi-

tion

occurs

at a bias

voltage

(uP

to

t5

volts

rnay

be

required),

where

no rnore

gain

reduction

appears

on

the

scope

for

increase

in

bias.

The

response

should

be flat

as

shown

in

Figure

L8'

Use

a

flber

screwdriver,

and

adjust

the

neutralization

capacitor

A3,

observing

the

,rrocking',

effect

on the

resPonse"

Adjust

the

trirnrner

for

flat

response'

IF

TRAP

ADJUSIMENT

1.

Connect

an IF

sweep

generator

to

antenna

terrninals'

z.Setsweepat43MC(CenterFrequency),sweeping$evenMC.SetAttenuator

for rnaxlrnum

outPut.

3.ConnecttestsCoPetotestpolntllvtlusingdecoupllngnetworkasshownin

Figate

ZZ.

Set

scoPe

for

high

gain'

4.AdjustthelFtrapA4forrninirnumresponseaSobservedonthetestscope.

8.

L'l

Ud

Poge

4l

SOUND

MARKER

Figure

I8.

Over-a11

RF

-

Itr'Response

Curve.

THE

POINT

ON FINE

TUNING

CAM

MUST

BE

IN

THIS POSITION

DURING

TFALIGNMENT

Figure

19.

Front

Yiew of

Tuner,

Poge

42

IF AMPLIFIER

AND

TRAP

ALIGNMENT

1. Construct

the

decoupling

network

shown

in

heavy

lines

in Figure

20and

connect

across R401,

chroma

detector

load

resistor,

test

point

"Ctr.

Connect

VTVM

to

point indicated.

Z.

Connect

4 volts

bias

supply,

negative

to

test

point

rrTrt

on AGC

buss

and

positive to

chas

sis.

3. Connect

RF

rnarker

generator to

durnrny tube

shield

(insulated

from

ground)

of RF

rnixer-osclllator

tube

VI02,

6CG8. Keep

generator

output

low

so as

not to exceed

2

volts

on VTYM.

4. Rotate

tuner

to channel

10. Adjust

the Fine

Tuning

as shown

in Figure

l$'

(

Step

Marker

Gen.

tr'req. MC

Adjust

VTVM

Reading

I

43.

Z

MC

A5

Maxirnurn

z 4L.25 MC

A6

3

45.IMC

,PL?

4

Connect

a

.005

rnf. capacitor

frorn

terrninal

3

of T20I

to

ground.

5 4?-4 MC A8

Maxirnum

6 46.0 MC

A9

7 Rernove

the

.005

rn{. capacitor

connected

in step 4.

8

4L.?5 MC

AIO

Minirnurn

9

47.25

MC

All

10 Repeat

step 8.

I1

Rernove

the

decoupling

network

frorn

test

point

rrcrr

and re-connect to

test

point

rrV'r.

lz

Dettrne 41

.25

trap Al4

by inserting

a

piece

of

iron lnto the

core.

13 Detune AI3

by rnisadjusting

its own

slug before

doing step 14.

(Top).

L4 44.

Z

MC Alz

Maxirnurn

[5 42.4

MC

A13

15

Rernove

piece

of

iron frorn AI4.

L7 4t.25 MC

At4 Minirnurr

FREQUENCY

TABLE

Chqnnel

Video

Sound

Chonnel

Freq.,

Corrier,

Corrier,

VHf Osc',

Number

MC

MC

MC

in(

2

54-60

55.2

5

59.75

I Ol

3

60-6

6

61.25

65.7

5

lo7

4

66-tz

61.25

7t.tS

t I 3

5

76-82

71.25

81.7S

123

6

82-88

83.2

5

g7.ts

129

7

r74-I80

17s.25

119.75

221

8

180-186

181.25

185.75

227

9

186-192

187.25

l9l.7s

233

IO

192-198

193.25

rs7.75

239

I I

198-204

199.25

203.75

245

12

204-210

205.2s

209.15

251

13 210-216

21r.2s

215.7s

257

LJ

3l,l}1FD

F

ro399

Figure

20.

Decoupling Network

(heavy

line) Shown

Across Chrorninance

Detector

Load

Resistor.

3.3

f"d

I

Poge 43

87 TOP

SLUG

5.58MC

88 BOTTOM

SLUG 3.58MC

Bll

BI

3.58MC

B9

B2

3.rMC

B5

3.58MC

B3

4.tMC

B4

4.5

MC

SEE LOCATION OF

A8 FROM

TOP

VIEW OF

TUNER

AII BOTTOM

SLUG

4Z 25

MC

Ato

TOP

SLUG

41.25

MC

A9

46

MC

A7

45.lMC

A6

4t.25MC

A5

43.2

MC

A'14

4t.2

5MC

A16

4.5

MC

A]5

TOP SLUG

4.5

MC

Al7

Blo

a,

l

-t

:

)

BOTTOM

SLUG

4.5

MC

Al3

TOP SLUG

BOTTOM

SLUG

4 4.2MC

42.4MC

Figure 21.

Bottorn

View of

Chassis Showing

Alignrnent

Locations.

d

?oge

44

1.

IF

RESPONSE

CURVE

CHECK

connect

sweep

generator

and rnarker

generator

to

durnrny

shield

(insulated

frorn

chassis)

of

6CG8,

VLOZ,

rnixer-oscillator

tube'

connect

oscilloscope

through

decoupling

network

(as shown

in

Figure

zzl to

lurni-

nance

detector

load

-

test

point

I'Ytr.

Connect4voltsbiassupply'negativetotestpointrratrpositivetochassis.

t

z.

3.

r0

r$I

fisrflafftr

F

igute

ZZ.

Decoupling

Network-(heavy

lines)

Sto*r,

Acrosc

Luminance

(Y) Detector

Load

Resistor'

Ld

Figure

23. IF

ResPonse

Curve

with

Markers,

at Test

Point

V.

42.5MC

44.7

TO

'l5MG

Fig:ure

24. IF

Response

Curve

at Test

Point

'rCrr.

Sweep

Gen.

Frequency

Marker

Gen.

Freq.

MC

IF

Center

{req.

(43.5

MC)

42.5 MC

44.7 MC

45.75

MC

Response

curve

and rnarker

PiPs

should

appear

as

shown

in Figure

23.

If

curve

is

tilted,

re-adjust

A5

sLightly

to

obtain

egual

Peaks.

Re-adjust

A?

to

Positlon

45.75

MC

rnarker

at

50%.

Dlsconnect

oscilloscope

frorn

lurni-

nance

load,

test

Po1nt

ttYtt,

and

re-

connect

through

decoupling

filter

to

test

point

rrCrr

chroma

load.

Curve

should

appear

as ln l.ig:u.re

?4'

ro403

44.7

TO 45|lC

12,t7

MC

(t

,2XiC)

\r,

{

poge

45

4.5

}IC

SOUND IF

ALTGN'VTENT

It is preferable

to

use a

TY signal

rather

thaa a

signal

generator

for

this alignrnent.

However,

if a

TV signal

is

not

available,

a signal

generator

which

has

been

chectea against

a crystal

callbrator

or other

frequency

stand.ard.

rnay

be

used.

Accuracy

required

is with-

in

one

kilocycle.

If

a

television

signal

is to

be

used,

connect antenna,

set

CHANNEL

SELECTOR

for

strongest

TY signal

available

and

tune

in

a

picture.

Follow

chart

below

using

TV

signal

instead

of generator

set

to

exactly

4. 5

MC.

Connect

VTYM

as

instructed

in step

,,a,i-

If

a

signal

generaLor

is

to be

used,

disconnect

antenna

and. short

antenna

terrnlnals

to-

gether.

Connect

VTVM

and

rnarker genexator

as instructed

in

steps

rrarr

and

nbrrbelow.

Then

follow

chart.

a.

connect

high

side

of

vrvM

to

test

point

,yr,

cornmon

lead

to chassis.

b.

connecl

RF marker generator

to

junction

of

L206 and

c301.

Step

Marker

Gen.

Freq" (MC)

Adjust

VTVM

Reading

I

Exactly

4.5

MC

A15

Maxknurn

z

Exactly

4.5

MC

A15

3

Disconnect

VTVM frorn

test polnt

rrYtt

and

re-connect

to

test

poin!

rrl, rr

4

Exactly

4.5

MC

At7

Zero

5

Repeat steps

1

and

2.

t

o

a.

b.

c.

TOUCH

.

UP

OF

RATIO

DETECTOR

SECONDARY

-417.

USING

TETEVISION

SIGNAT

Adjustrnent need be

made on one channel

only.

Turn

set

on and

allow

about

15

rninutes

for

warrn

up.

Tune set for

norrnal plcture

and

sound.

Carefully

adjust

the secondary

slug

(A17)

of the

Ratio Detector

Transformer

using

a

non-rnetallic

alignrnent

tool

with a

hexagonal

end (part

nurnber

98A30-12).

Both

slugs (AI5

and

A17)

have

hollow

cores.

Either slug

rnay

be

adjusted

from

the

top

or

bottom

of the chassis

by passing

the

alignment

tool

through

the

core

of the first

slug

encountered.

AI7

is

the slug

closest

to the

chassis.

Adjust

A17 for

best

sound

with

rninimurn

buzz

leveI.

Do

this

carefully as

only

slight

rotation

in

either

direction

will generally

be

required.

Correct

adjustrnent

polnt

is

iocated

between

the

two

rnaxirnurn

buzz peaks

that

will be

noticed

when

turning

the

slug

back

and

forth

about

l/4

to L/Z

t:urrr.

If

necessary,

repeat

lndividual

channel

slug adjustrnent

and

conclude

with retouch-

ing

the ratio

detector

secondary.

Note: lf oscillator

adjustrnent

is required

for

other

channels,

it

will

not be

necessary

to repeat

the

ratio

detector

secondary

ad-

justrnent

after

once

correctly

adjusting

it.

)

d

d.

L

1.

z.

3.

4.

Poge

45

SUB.CARRIER

ATIGNMENI

By-pass

to

ground

pln

?

of

V40IA,

lst chrorna

arnplifier

with

.01

capacitor.

Connect

DC

VTVM

through

100K

resistor

to

pin 7 of

y5OZ,

color

phase

discrirnina-

tor.

Adjust

top

and. bottorn

slugs, 87

and 88,

of T502,

sub-carrler

osclllator

trans-

forrner,

for rnaxirnurn

output.

Repeat

until

rnaxirnurYl

is

obtained.

Rernove

by-pass

capacitor

frorn

pin

?

of

V401A.

CH ROMA

ALIGNMENT

1.

Connect

a

delector as

shown.

efflillat

cfr'ru

0/00t(/160

0i

fi65, frc./

r0

vrvil

0il00aur0l

(asf

ff t&Sr

50r

iltct)

alf

r0 clltssls

tfr0al0

Turn

color

intensity

control, R505

clockwise

about 3/4

of. its

range.

W'ith

cliplead,

ground

the color

ki1ler

pulse

(junction

of

C501,

R501).

Connect

a

.01

rnfd.

capacitor

across

the

phase shift

network

coll

,

L406,

terminal

#1

to

#3.

Connect

an

RF Signa1

Generator

through

a 3.3K

ohrn

resistor

to the

junction

of

L40l

and

C4OZ,

input of Ist

chroma

arnplifier.

Ground

the

grid, pin

I, of

the 4th IF

tube,

V204.

Detune

4.5 rnc.

trap, L401

(B,4) by turnlng

slug

out

about

three

turns.

Adjust

chrorna

stages

in the

following

order,

using

3.58

rnc.,

3.1

nIc.,

and

4.

1 rnc.

spot

frequencies.

Rernove

ground frorn If'grid,

and disconnect

signal

generator.

Tune

ln black

and white

station,

adjust fine

tuning

for

rnaxirnurn

reading

on VTVM'

Then

adjust the

4.5 rnc.

trap,

L401

(84) for minirnurn

reading

on vTVM.

Rernove

detector

and

phase shift

coil

bypass

capacitor.

{

ru Pil I

2.2ntl

0f f-l

<-11---

'.il

L

Z.

3.

4,

5,

6.

7.

10.

Frequency

3.58

rnc.

Maxirnurn

Maxirnum

Ld

'

Page 47

Blo

87

TOP

SLUG

3.58MC

B8 BOTTOM

SLUG 3.58MC

Bl'l

BI

5,58MC

B9

B2

3.tMc

B5

3.58MC

B3

4.rMC

B4

4.5

MC

SEE

LOCATION

OF

TOP

VIEW

OF

A8 FROM

TUNER

AII

BOTTOM

SLUG

47.25

MC

Alo

TOP

SLUG

4t.25

MC

A9

46

MC

A7

45.tMC

A6

4t.25MC

A5

43.?MC

Al4

4r.2

5MC

Al6

4.5MC

A15

TOP

SLUG

4.5

MC

Al7

'i

jl

ti

rl

l

.9

a.."tti::.

i1lw#

BOTTOM

SLUG

4.5

MC

AI

TOP

SLUG

42.4MC

BOTTOM

SLUG

44.2MC

Figure

25.

Bottorn

view

of

chassis

showing Alignment

Locations.

it

-,

L

I.

Poge

48

COLOR SYNC

-

COLOR

PHASE

ALIGNMENT

lffith

clip

lead, connect

junction

of

C501, R50l

and

R504

to

ground; this

shorts the

color

killer

pulse to

ground.

Connect

Color

Bar Generator

with RF

output to

antenna

terrninals

and adjust fine tuning

correctly,

i.e.,

for

rninirnurn

9ZO

KC

beat on screen

of

picture

tube.

Z.

Connect

'Scope

probe

to

cathode of

picture

tube, Y404.

Adjust

3.58 MC

trap

(B5)

{or

rninimum

sub-carrier

on color

bar'Scope

pattern.

tscope

gain should

be set

at high

level

for

this

adjustrnent.

Adjust Burst

Arnplifier

plate coil

(89) for

rnaxirnurn

DC

at pin 7 of

Y502;

approxirnate-

1y 80 to

100 volts negative. Note

and rernernber

this

reading"

Use

VTVM"

Adjust B10

so that

color

is

in

sync

and voltage

at

pin

I

of

V502

is 6

volts

negative.

Use

VTVM.

Set Color

Intensity

control

for

low

level color

bars.

Set

Bar

Generator

for

B-Y

output.

Set Color

Fidelity

control

to rnid-range.

Touch

up

89

so that B-Y

output

at

R-Y

dernodulator

is

zero

as

observed

on'Scope

connected

to

control

grid

of

red

gun.

Recall

peak

output

of

step 3

above.

If

voltage

obtained

in

step

6

is less than 10%

of

that

obtained

in

step 3,

return

to 89

and adjust

to

within

10%

of maxirnurn

reading originally

obtained

in step

3. Touch

up Bt

for zeto

B-Y

bar

out-

put at

control

grid

of

red

gun.

Set

Bar Generator

for

R-Y

output.

Connect

tscope

to

control

grid of blue

gun. Adjust

BII

so

that R-Y

output

at

B-Y

dernodulator

is

zero

as observed

on

scoPe. Recheck

step

6

and repeat

if necessary

as there

is some

interaction.

Remove

clip

lead

connect

in step

I from

junction

of

C501,

R501 &

R504.

Connect

VTVM

between

the

junction

of L403

& R5I3

and

pin

6

(cathode) of

lst

Chrorna

Arnp.

(V40lA).

'With

Color

Intensity

control

set

at rnaxirnurn,

rneter

should

read 0 volt,11.0

volt.

Tune in black

and white station. With

rneter

connected

as in

step

8,

and

Color

Intensity

set

at

rnaxirnurn,

reading should

be

at least minus

10 volts.

SERVICE

HINTS

PICURE

IUBE

REMOVAT

1.

Disconnect

the

High

Voltage

lead

connector

corning

frorn the

High

Voltage

rectifier

tube

socket

and

discharge

any

High

Voltage

static

charge

remaining

on

the

Znd

anode

ring

around the

faceplate of the

tube.

See

Figure

Tfor

location

of

High

Voltage

con-

nector. This

will

guard. against

any unnecessary

and

dangerous High

Voltage

shock

(20

KV)

while handling

the tube.

Z.

Rernove

picture

tube

socket,

blue lateral

magnet,

purity

rings' convergence

coil

as-

sernbly. See

Figures

3

and

7.

3.

Rernove

yoke, see

yoke rernoval

instructions

in

this

section.

4.

Rernove

the

four hexagonal

nuts

that hold

the

picture tube

rnounting

strap to the

four

retaining

rods connected

to

the

rnetal

yoke

bracket

around

neck

of

tube.

5. Loosen,

but

do not

rernove two

nuts

shown

as

rrGrr,

Figure

5. This

will

permit the

yoke housing to

be tilted

upward

allowing upward

rnovernent

o{ tube

during

rernoval-

6.

Rernove

bolt

and nut

rrDtr

on the

picture

tube

rnounting

strap.

IMpORTANT:

Three

insulating

rrbootsrr

and

High

Voltage

connector

rernain.

REMEMBER

their

exact

positions in order

to

re-install

properly on

new

picture

tube.

{

3.

4.

5.

6.

8.

a

rb -!

tbJ

?oge

49

7

'

The picture

tube

is

now

ready

for

rernoval.

Grasp

the tube near

the

top

and

bottorn

of

the

faceplate

and

gradually

lift

until

free.

Great care should

be taken

to

prevent

burnping

the

tube

which

rnight

cause

darnage

between

the glass

face

and

rnetal cone.

5,

Do

not

allow

the

rnetal

shell

to corne

in

contact

with any

rnagnetized

rnaterial as

this

will

cause

loca1

magnetization

of

the shell

resulting

in

color

purity

contarnination.

8.

Place

the picture

tube,

face

down

on

a

clean

cloth

or soft paper

on a flat surface.

9.

Rernove

the insulating

'boots'

and

High

voltage connecror.

IMPORTANT:

Rernernber

the

exact location

of

the insulating

,bootsr

and

the

High

Volt-

age

connector

in

order

to re-install

properly

on new

picture

tube.

INSTALTING

PICTURE

IUBE

1.

Position

the tube

so

that

the

blue gun

will

be on

top

when installed

in

chassis.

See

Figure

g

for

identification

of

blue gun.

Z.

Place

the

High

Yoltage

connector

on

the ultor ring,

lead

extending

to the

right,

at a

point

in

line

wi.th

pin

14 on

the base

of the

tube.

Looking

at the

face

of

the

tube with

the

blue gun

on

top,

the

connector

should

be approxirnately

in

the

nll

orclock'r posi-

tion.

3.

Install

the

cone

shaped

boot

first.

4.

The

second

boot

fits

snugly

around

the ultor

ring and

outer

circurnference

of

the

pic-

ture

tube.

Place

one

end

to the

irnrnediate

left

of the

High

Voltage connector

and stip

onto

the

tube

counterclockwise.

The boot

will

overlap.

FoId the

High

voltage lead

to

the left

and

bring

out

where

the

boot

overlaps

ends.

5.

Install

the third

boot

so the

overlap

is in

the

upper

right

(approxirnately

the

'rl

olclockrr

position)

looking

at

the face

of the

tube.

6.

Install

picture

tube

into

chassis.

CAUTION:

In order

to

tilt

the tube

enough to slide

over

the

rnounting

brackets,

the yoke

rnust

be rernoved.

See

yoke

Rernoval instruc-

tions.

7.

Install

the

Rirn

Magnet

Assernbly

strap,

yoke,

convergence

coi.I assernbly,

purity

rings,

blue lateral

rnagnet and picture

tube socket.

8.

Retighten

hex

nuts

I'Grr.

See Figure

5.

9-

Install the four

retaining

rods

between picture

tube

support

strap

and yoke

mounting

bracket.

Adjust

the

tension

on

these four

rod.s

to

perfectly

center

the

neck

of the

picture

tube

through

the yoke

shield.

DEFIECTION

YOKE

REMOVAT

1-

Rernove

picture

tube

socket,

blue

lateral

rnagnet

and

purity

rings.

z.

Rernove yoke

and

convergence

assembly

plugs

frorn

their

sockets.

3.

Rernove

convergence

coil assernbly.

See Figure

5.

4.

Rernove

the

two

wing

bolts

ilBr'.

See Figure

5.

5"

Carefully

rernove

Deflection

yoke.

CONSTRUCTING

A DEtTAGNETIZING

COtL

A dernagnetizing

coil

suitable

for

degaussing

the

rnagnetic parts

of the

ZLAy-pZZA

color

picture

tube

ls described

below.

This

coil is

intended

to degauss

the

rnagnetic parts

of

the

color

picture

tube

should

they

become

rnagnetized

during

shiprnent

or

handling.

Inability

to obtain

a pure

red,

blue and

green

raster

after

carefully

rnaking

the

color

purity

adjustrnents,

including

the

adjustrnent

of the rirn

rnagnets,

is

evidence

that

the

pic-

ture

tube

rnay

have

become

rnagnetized.

Fu11

instructions

and

parts

required

for

construc-

tion are

given

below.

The use

of the

coil is described

under

'TCOLOR

pURITy"

on page I5.

{,

Poge

50

Parts Required

for

Construction

The

rnaterials

needed

for

the

dernagnetizing

coil can

be

obtained

at

rnost

electrical

supply

houses"

40t

0"01" Fish

paper

-

Z-Ll2t'in

width

30t Carnbric

Yellow

varnished

tape

5t Scotch

brand vinyl

electricianrs

tape

1250t

#16

Forrnex

rrragnet wire

-

about

l2

lbs.

AC

line cord

and

plug

Coll

Construction

l.

Make

a

cylindrical

form ZZ-Li2,'

O.D.

and

approximately

4" wide.

Several

rneth-

od.s

of construction

can

be used

in rnaking

this

forrn. This

coil

is

not critical

and

following

the

general

procedure will

result

in a

satisfactory

coil"

.Method

A

(a)

I[ith

a

piece of. ll4,'plywood

4,twide

and 70-LllL6rrlong,

rnake

a

series

of

1/8"

deep cuts

with

a saw on one

side. These

cuts

should

be

made

about

every

Ll2t, io

facilitate bending

the

plywood

into

the

required

cir-

cular

forrn.

(b)

On

a large

flat surface,

scribe

a Z2-!f

4" circle

and

lay

out the

plywood

strip to

fit within

the circle. Use

nails

at

several

points

along

the

circle

to

hold the

plywood in

p1ace.

Pay

particular

attentlon

to

the

ends

of

the

plylvood in order

to

get a

srnooth,

circular

joint.

Method

B

Follow

steps

(a)

and

(b)

in

Method

A under

steps 1,

but

use

a piece of

sheet

d

rnetal

4', wide

and

?0-11/16'1

1ong. This

won't

be

as rigid

as

plywood

and

lb

{

will

require

more

nails to

hold

it

in a

circular

shape.

Z.

Allow

Ttt for start

lead,

and

using

#16

Forrnex

rnagnet

wire, layer

wind

200

turns

in 4 layers

of 50 turns

each

on

the

forrn.

Use

.01"

thick

fish

paper

between

lay-

ers

for

insulation.

3.

Use

clear

siotch tape

in spots to

prevent coil turns

frorn

loosening.

4. After

the coil

is wound,

bring the

end lead

out

near the

start

lead,

and allow

at

least

Ztt for splicing. Secure

the

end 1ead.

5.

Rernove

the

coil by cutting

plywood

forrn in

half.

6,

Cover

windings

with

I layer

of carnbric

yellow

varnished

tape or equivalent

and

secure

ends

with electricianrs

tape.

7.

Splice

and

solder ends to AC

cord.

8. Securely

anchor

and

cover

leads

with

electrical

scotch

tape.

{

*"{

t.!

Poge

5I

COTOR

TV

TROUBLE

SHOOTING

CHART

il

r,

I

:

I

l

I

l1

I

I

t,

i,
't

!

ii

SYMPTOM

CHECK

IUSING

COLOR

BAR

GENERATOR}

No color.

Picture

and

Sound

OK.

Fine

Tuning,

Color

Intensity

Control

settings.

Tubes

V401,

V4OZ,

V403,

V501,

VSOZ,

v503.

--l',.,,..!:,.,'
r,

i

:"...:i,

ti

r.,

i.::!

r.1.,\!t,r..:i

a:;e!-

Bias

on

control

grid

of

v5038.

I

'!

:'':ii

r"'

i

Loss

of

bias

(negative

voltage)

indicates

loss

of

3.

58

mc

oscillation.

Bias

on

control

grid

of

V40lA.

Bias

on

grid

of

V40tB.

Should

be

_

5.5

vo1ts.

'W'aveforrns

at plate

of

V403A

and

V4038.

'\,[aveforrns

at

control

grids

of.

y4A4,

picture

tube.

Loss

of

Color

Sync.

r'

1

,i,

',t.\

Picture

and

Sound

OK.

".

:,:..

,i',;

\

'

I

I'ine

Tuning

Control

setting.

Tubes

V501,

YSOZ,

1/503.

Bias

on

control

grid

of

V503A.

Votrtage

at

pin

SL

of.

vsOZ.

Should

be

_

6 volts.

fmproper

Color

s

.

Picture

and

Sound

OK.

Color

Fidelity

control

for

proper

range

and

operation.

proper

colors

should

be

repro_

duced

at

approxirnately

rnid-range

of

Co1or

Fidelity

control.

If

not,

set

Color

Fidelity

to

mid-range

and

adjust

L501

(see

schernat_

ic)

for

proper

colors.

Tube

V403.

'W'aveforrns

at

cathode

and

plates

of

y403.

Waveforrns

at

control

grids

of

y404,

picture

tube.

Poor

Purity.

Picture

apparently

OK.

Sound

OK.

Adjustrnent

of

purity

Rings,

Rirn

Magnets,

and

Yoke positioning.

If

unable

to

obtain

good.

purity,

degauss

Picture

Tube

and

re-check

purity

ia;ust_

rnents.

Using

a

White

Dot

Generator,

follow

the

Con_

vergence

Adjustrnent

procedure

in

manual

s592.

W'aveforrns

at

terrninal

UZ

on

T6OZ,center

terrninals

(rnovable

arrn)

of

Vert.

A*p.

,

Vert.

Tilt,

and

DC

controls.

Continuity

of

coils

on

Convergence

yoke

As

sernbly.

&i

Poge

52

SYMPTOM

CHECK

(USING

COLOR

BAR GENERATOR)

Picture

background

appear

s

Reddish,

or Bluish,

or

Greenish.

Sound OK.

If Reddish,

check Red

Screen

control

adjust-

rnent.

If Bluish,

check Blue Screen

and

Grid

ad-

justrnent.

If

Greenish,

check

Green Screen

and

Grid

control

settings.

Turn Color

Intensity

control

to

rninirnurn

(rernove

color

information

frorn

picture).

Perform

Black

and

White

Tracking

adjust-

rnent

as

per

instructions

in

manual

5592.

'Waveforrns

at control

grids of

Y404,

Pic'

ture

tube.

Tube V403.

Voltages

at control

grids of

Y404,

Picture

tube.

Check

for cathode-to-grld

shorts

in

V404.

Picture

is dirn.

Sound OK.

Brightness

control setting.

Tube V205.

Circuitry

o{ tube YZO5.

Lurninance

Detector,

CR201

Loss

of

color

and

sound.

Picture OK.

Sound

and

Chrorna

Detector,

CF.Z0Z.

Sound Bars

in

Picture.

Fine

Tuning

setting.

Oscillator

Slug

setting.

Rtr', IF,

Subcarrier

Alignrnent

920

KC

beat

interference

pattern in

picture (appears

as rnediurn

fine

cross-hatch)

Sound OK.

Fine

Tuning

Setting.

Oscillator

slug

adjustrnent.

IF

alignrnent

(especially Traps

L201

,

LZOZ,

and

L205

for correct

alignrnent).

t

t{

3{

I

Poge

53

.

'!t

I,

DEAD

RECEIVER

SYMPTOM

CHECK

Dead receiver.

Loss of

Sound and

Raster.

Tube filarnents

are

not

lit

P1ug,

Line, cord, and

Interlock connector.

On-off

switch.

Power

Transforrner.

Dear receiver.

Loss of

Sound and

Raster.

Tube filarnents

are

lit.

Fuse

(2

arnp,

F70l).

Fuse

(3/4

arnp,

F60l).

Deflection yoke plug.

(Rernoved

frorn

s

ocket).

Circuit

cornponents

of

Low

Yoltage

Power

Supply.

MONOCHROME

PICTURE

AND

SOUND

Loss

of

Sound and

Picture.

Raster

OK.

Tubes

VI01,

YL}Z,

YZOL,

YZjZ, VZO3,

Y204,

Y206"

Interrnittent

Sound and

Picture.

Raster

OK.

Antenna

and

Transrnission

line for

loose

or

broken

connection.

Be sure

Transrnission

line

is

not

shorting

at

receiver

antenna

ter-

rninals.

Tubes

VI01,

Vl02

and

circuitry.

Tubes

V201,

YZ)Z, Y203,

Y204

and

cir-

cuitry.

Dirty coil

contacts in

tuner.

W'eak

or loss

of

Picture"

'W'eak

Sound.

Raster

OK.

Fine

Tuning

setting.

Oscillator

slug

setting.

Tubes

V10I,

Vl02.

Tubes

V201,

VZAZ,

V203,

V204,

y206.

RF

and

IF

alignment.

MONOCHROME

PICTURE

Interrnittent

or loss

of

picture.

I

Tubes

yZO5,

y206.

Sound and

Raster

OK.

I

faufty

Contrast control.

Lurninance

Detector CRZ0 I .

Weak Picture

(lack

of contrast).

I

tuUe

YZO5.

Luminance Detector

CRZO1.

Sorrrrd and

Raster

oK.

I

Circuitry of

y205,

waveforrn

at

plate

of

Y205.

)e

Poge

54

SYMPTOM

CHECK

Poor Hori

z,orrtal Linearity.

Insufficient

width.

Insufficient

brightne

s s

Tubes

V605,

V606.

Low

Voltage

Rectifier

Tubes V701,

Y702.

Horizontal

Drive

setting.

Horizontal

Linearity

control

setting.

CAUTION:

Do

not

atternpt

to

set the Hori-

zorrtal Linearity

control

except

by following

the

step

by

step

procedure

given

in

Manual

s592.

Picture Jitter

(sideways)

Sound OK,

or

Hissing.

Horizontal

HoId

control

andf

or Lock

ad-

justrnent (especially

in weak

signal

areas).

Noisy

or

rnicrophonic

tubes

Vl01,

Vl02,

YZO1,

YZOZ,

YZO3,

YZO4,

y205,

y604,

Y605.

Arcing

in Sweep

(horizontal)

section

of

receiver.

Srneared

picture.

Sound OK.

Fine

Tuning

setting.
Tube V205.
Lurninance

Detector,

CR201.

Open

Peaking

coils,

L302.

Rtr',

IF

alignrnent.

Poor

Picture

Detail.

Sound OK.

Fine

Tuning

setting.

Misrnatch

in

antenna

sYstern.

Tube Y205

or circuitrY.

RF,

IF

alignrnent.

Sound

Bars

in

picture.

Fine

Tuning

or Oscillator

slug

adjustrnent.

Rtr',

II.

alignrnent

including

traps.

ttSnowt'

in

picture.

Antenna

or transrnission

line.

RF,

Itr.

alignrnent.

Tube VlOI.

Poor

horizontal

linearitY.

Horizontal

Drive

setting.

Horizontal

Linearity

control

setting.

CAUTION:

Use

Procedure

outlined

in

Manual

5592

for llnearity

procedure.

Tubes

V605,

V606.

'Waveforrns

at

V604,

Y605.

3d

t,d

rD{

(5)

SYMPTOM

CHECK

Poor

Yertical

Linearity

Yertical

Linearity control

setting.

Tubes

Y6OZ,

V603.

Vertical

Output

Transforrner.

Leaky

Capacitor

C6ZL, C622.

Vertical

Bars

on right

side

of

Raster.

Tubes

Y604,

V605,

V606.

Herringbone pattern

in plcture.

FM

or other forrn

of

interfer-

ence.

Trap alignrnent

of.

L20L,

LZOZ, L205.

Regeneration

in

IF arnplifier (caused

by

IF rnisalignrnent.

Alignrnent

of

IF trap,

L10I.

Light andf

or

Dark

Vertical

Iines (bars).

Usually

at

left

side

of raster.

Tubes

Y605,

Y606.

Setting

of

Horizontal

Drive.

Two heavy,

black

horizontal

bars

in

picture.

Open

filter

capacitor

in power

suppty.

One

heavy,

black

horizontal

bar

in

picture.

Heater

to cathode

short

in

picture

tube,

v404.

Heater to cathode short

in

Y101,

Vl02,

vzol,

Yzoz, Y203,

Y204, V205,

V403.

Bend

in

picture

at

top.

Horizontal

Lock adjustrnent,

L601.

Tube

Y604

and

circuitry.

Poge

55

Ir

tr

II

li

t!
t:

i:

i'l

t

1i

E

t:

ti

it

-tl

fl

G

E

{

I

I

i

il

1

1;

j

.E

u

lfl

ifl

tl

rtt

li

ti

l!

It

li
il

ti

t1

I

SOUND

Distorted

Sound.

Tubes

Y301,

Y302,,

V303.

Ratio Detector

Transformer alignment.

Loss of

Sound.

Picture

OK.

Tubes

V301,

Y302,

V303.

Audio

output

transforrner,

T302.

'Weak

Sound.

Tubes

V301,

V303.

Sound alignrnent.

Poge

56

SYMPTOM

CHECK

Noisy

Sound.

Picture OK.

Tubes V301,

Y302,

V303.

Volume

control

(faulty).

Circuitry

(1oose

connection)

in

V301

,

Y302,

v303.

Sync

Buzz

in Sound.

Fine Tuning

setting.

Faulty

capacitor,

C301

Sound

alignrnent.

Interrnittent

Sound.

Tubes V301,

Y302,

Y303.

Speaker

or Audio

Output

Transformer,

T302.

I{

T{

SYNC

Poor

horizontal

and vertical

sync

(weak

signal

area).

Tube Y101.

Loss

of vertical

sync.

Horlzontal

sync

OK.

Tube

V602.

Capacitor

C6L7

,

C618.

W'aveforrn

(check for

presence

of

sync

pulse)

at control

grid

of

Y60ZB.

Loss

of vertical

and horizontal

syrrc.

Interrnittent

or weak

horizontal

and/or

vertical

sync.

Tubes V601,

V602.

Loss

of

Horizontal

Sync.

Vertical

Sync OK.

Tube V504

and circuitrY.

Horizontal

Lock

adjustrnent,

L601.

Sync

Discriminator,

CR501.

'W'aveforrns

at

tubes

V602A,

Y504,

and

at

Sync

Dlscrirninator,

CR601.

Picture

"locks

ln'r only

at

center

of Horizontal

Hold

con-

trol.

tr'alls

out of

sync

at ex-

trerne

settings

of

control.

Sync

Discrirninator

CR601

and

circuitry.

Check

R520

and

R621

for correct

value.

\}{

Poge

57

RASTER

SYMPTOM

CHECK

No

Raster.

Sound

OK.

Tubes

Y6O4,

V505,

V606,

V6OZ,

V60g,

y404.

Horizontal

oscillator

circuit.

Horizontal

output

clrcult.

Horizontal

output

transformer.

Darnper

circuit.

Leaky

or shorted

capacltors,

C6Zg,

C630.

Interrnittent

Raster.

Sound

OK.

Tubes

Y604,

V605,

V606,

y607,

V60g,

v404 (PIx

TUBE).

Znd

Anode

Power

Supply

for

arc-over

or

corona

dlscharge.

Horizontal

oscillator

and

output

circuits.

Darnper

circuits.

'W'aveforrns

at

V604,

V605 grids.

Raster

Itbloorns,'

as

brightness

is

increased.

Horizontal

output

tube

y605.

Znd

Anode

rectifier

V6OB.

High

voltage

regulator,

V609.

High

voltage

(20

KV)

at picture

tube anode.

Insufficient

raster

brilliance.

Horizontal

Drive

adjustrnent.

Znd

Anode

power

Supply

Voltage.

Picture

tube,

y404.

Tilted

Raster.

Position

of deflection

yoke.

Raster

not

centered.

Setting

of

positioning

controls,

R560,

R6gZ.

R660,

R68z for

open.

Excessive

Raster

size

(Over-

s

can).

Vertical

Linearity

and

Height

control

ad_

justments.

Znd

Anode

Power

Supply.

'rKeystonedrt

raster-

Deflection

yoke

for

shorted

turns.

n.

ll'

II

;!

t

1i

li

I'

li

It

I

ll

II

l-'

6

r

)

t

,t

Poge

58

SYMPTOM

CHECK

Insufficient

raster width.

Horizontal

Drive

(R646)

adjustrnent

Tubes

Y604,

V605.

Power

rectlfier

voltage

outPut.

Insu{ficient

raster

hetght.

He1ght

and

Vertical

Linearity

adjustrnents.

Vertical

oscillator

and

vertical

output

tubes

Y602,

v503.

No vertical

deflection.

Tubes

Y602,

V603.

Deflection

coils

for open

circuit.

Vertical

Linearity

control

for open

clrcuit.

'Waveforrns

at

V6028,

V603.

Foldover

of vertical

sweeP.

Yertical

oscillator

tube, V5028.

Vertical

output

tube,

V603.

Capacitor

C623

for

short.

Raster

too

srnall.

Insufficient

Height

and

\tridth.

Line

voltage.

Power

rectifier,,

volt'age

outPut.

Height,

Vertical

Linearity,

Horizontal

Drive

adjustrnents.

Excessive

brightness.

Brightness

control

has

no effect.

Brightness

control

R438

for

oPen.

Irnproper

focus.

Focus

rectifier

tube, V607.

Voltage

at

Pin

9

of. Y404,

Picture

tube

(3.8

KV.

DC).

Focus

rectifier

control

for value.

Reslstors

Ft672,

R673

for

va1ue.

lr

U

(

f

!

poge

59

PARTS

IIST

ElectricaL

conponents

have

symbols in lOO serles,

20O series, etc., aecording

to locatlon

on schematic.

Order

parts

by

part

nunber and deseription from

Admiral distributor.

syn.

RESI STOR S

Descriptlon

Part

No.

sym.

Rl-ol-

I,ooo

obms

.....

5On

8-fOa

R102 2,20o ohns

.....

5Oe 8-ZZz

R1o3

3,9OOohms

,.,.,5O88492

R1o4 22orooo ohms..

.

5os 8-ea4

81o, lOroOO ohms...

.608

8-103

R1o5 5r8oo

ohms. ....

5oB 8-582

Blo? 1,Ooo obme.

....

5oB 8-102

RloB

!1

ohms,

5/,

O\DL3L-L

Tuner

only)... 6ov

7-5to

RIIo

IOTOOO

ohms..

.....r.r

.603

B-1o3

R111

lrrooo ohms

(!4D111-2

Tuner

only)... 6ol

B-rr3

R2O1

22rOOO ohtts,

5$.

,,....

6OS

7-Ze3

R2O2 10 ohms,

5%,....

... ..

.

5OA

7-fOO

R2O3

IO,OOO

ohms..

,.

5Or 8-rO3

R2ol+

!5

ohms,

5%..,..

.,...,

6aB

7-r5o

R20,

I,OOO

ohms

.....

5or 8-foz

R2o6

3groooohns,J$.

.....6088-393

R2oT

l+r700

ohms, 2 watts

...

6oa 2a-\72

R2o8 lrOoo ohms

.....

508 8-Io2

R209

!6ohr:rsrr%...,.

.....,6O27-r5O

R2]O 10 oh&s,

5%.....

...... 6Or

?-rOO

R21I

4r7oo

ohms, 2 watts

.,.

5oS

20-\72

R212

1)

ohms,

,$,....

......

5oA

?-rro

R213 I,OOO ohms.

....6Oe

8-rOZ

R214

82,ooo

ohms..

..

6os 8-8ao

R21, 62 ohms,

,%.....

.. ,...

6oy

7-5zo

R215 58,ooooyms,)$.

......60sf-683

R217

J,!Ooohns, r/,.....

...5O9749a

R2t8

4r7oo

ohms, 2

watts

...

5or

Zo-\7a

R219 470

ohms

6os 8-4zr

-.,.^

I),,laa

olu:s (Run

r)...

..

.... ..

60B

i-r

T;.

'\""12,7Ca olu.rs

(riun

13)....

......

ior 3-a7a

R22L 27,AOO

obns,

)fu.

...... 60B

7-273

R222 47,00o ohms..

..

608 8-l+73

R223

)+r3OO

ohms,

,%,....

. ..

6OA

7-\32

R22,

,00

ohms,

Contrast eontrol.

..

71C

13-7\

R225 zz,ooo

orrrai, r wattllllT

.

. .

5os :t+-ea3

R227

47,000

ohms..

..

5os 8-413

R229

5r8oo

ohms.

....

5ol 8-58a

R23o

l+7

ohns.

6og 8-4To

R231

2r2OO ohms

(aaaea

at

Run

13)........ 5oB 8-222

R232

)r0OO

ohnrs,

)

'nratts.

..

5fA

17-9

R3o1

I2O olurs. ....,.

603 B*12I

R302

lorooo

ohms,

2

r.atts. .

5og aO-fo3

8303

39o

ohms.

......

5oB 8-391

R3o4 47rooo

ohms..

..

5on

8-4'f:

R30, lor0oo

ohms..

..

5oB

8-IO3

R3o5 ro,ooo

ohms...

.6on 8-ro3

n3o7

22,O0o

ohms...

,

5ol 8-ZZ3

R3O8

1 megohm,

Volur:e control

(trneludes

R)+38).

...

TrB

tr-31

B3o9

470

otuns

5On 8-l+?r

R310 2.2 rnegohns

....608 \-ZZj

R311

3r9O0

ohms,

2 watts

... 5Of AO-39A

R312 2rJO0

ohms, 2 Lretts

... 608 20-272

R313 l-00,0OO ohms...

5OS 8-fO4

R31\ .! megohm,

Tone control

,.....

|rC

73-73

R3r6 22o,ooo

ot

"*.

-

...... 6os }-zzi

B3}7

390,000

ohms...

608

8-391+

R318

IOrOOO ohms, I

watt..

.

part

of L3O2

R319 2rlo0

ohms,

10 watts.

6fS ZO-8

R331

33o

ohns,

1 vatt,

.....

5oB

14-331

R4or

lorooo

otmst

7y',,

....,.

5oB

7-103

n4o2

IOrOOO

ohrts,

)',",

......

ooe

7-ro3

Rl.o3

120

ohns

(nun

1

only).

Jo:

t-121

R4oL

2rlOO ohms,

7

watts.

.. 5rs

zo-8

Rl+o5

47orooo ohms..

.

6os

8-4ZL

R\o5

27rooo ohms,

2 watts.

.

6or ao-273

Rl+oT

]rooo

ohns

.....

5oe 8-roz

Rl+o8

lorooo ohms,

r watt.

.

60B 1l+-103

R4o9

1r2oo ohms,

2 watts

...

608 20-122

R41o 1,!oo

ohns, 2 watts

...

5oB

2}-lrz

R4rr

47orooo

ohms..

. 5oB

8-474

R412

l-5rooo obms,

2 s,atts,

5os eo-rr3

RLt3 l-o,ooo ohms, 2

wattsr

,%.,...

5or

r9-ro3

R414

l+7o

obns, l- watt.

.,...

5os

1l+-)+71

R[r, 2,loo ohms

.

.

.. .

60B

8-272

R)+16

2,Too o}]Irs ...

..

608 8-272

R4I7

5Bo

ohns, 1

watt. .....

5og

14-581

RLIB l8rooo obms, 2 watts.

6or ao-r83

R)+19 l8rooo ohms, 2 watts.

5oe ao-r83

Rl+20

l-ooro0o ohms.. .

5oB 8-104

R42r

2,loo ohms .....

6on

8-z7z

R\22 loorooo

ohms..

5on 8-ro4

R423

2rJoo obms.

....

6og 8-z7z

R42l+

3r3oo

ohms, 2 watts ...

6os 20-332

R42,

l-oo,ooo ohss...

5os 8-rd+

R4z6

2,Joo ohns.

....60I

8-272

Rl+2?

l-oorooo ohms..

508 8-Iou

R428

J- megohm,

Blue

Screen

Sg4lggl

(rncludes

R441). ...

758

l7-L9

R429

,60,000

ohms..

.

5os

8-564

8430

1 megohm,

Green Screen

control-

(Incrudes

R\3r). ..,

758

t7-L9

R431 1 megohm,

Bed Screen

Control-.

|rC

2O-rA

R432 22o,ooo ohms. . .

608 8-224

R433

loorooo

ohms.. .

5or 8-ro4

R434 l-oo,ooo

ohms.. .

608 B-lou

R43,

,oorooo

ohms, Green Grid control

(rnctudes

B[To[.;=. ...*. ...

7rB

77-79

R435

82rooo

ohms..

..

5oB 8-823

R43?

,6,000

ohns.. ..

6os 8-:53

R438

,0OrO0O

ohms,

Master

EfLeblnesE

Control-

(Includes

R308). ..

7rB

ll-:,

B\39

Sarooo

ohms..

".

5oB 8-823

Rl+40 l-Sorooo ohms..

.5og

8-rB4

R441

,O0rOO0

ohms, Blue Gr:!!

control-

n442

loorooo

ohms..

6os 8-rol+

R4\3 68rooo

obns,

1%.

..

.

.

.

.

5os

Z-683

Rl+l+)+ 22,ooo

ohms. . . .

508 8-223

R44,

33orooo

ohms. .

.

6os 8-334

R50r

3301000

ohros..

.

5oe 8-334

8502

33r00O

oirms, 2

r.ratts

(taaea

at

Run

13)....

.....

608 20-333

R503

t8ro00

ohms,

2 watts.

.

60B 20-183

Rro4

12,.ooo ohms..

. .

6on 8-ra3

RIOS

21000 ohms,

Color Intensity Control,

75C

l3-7O

Rro6

4,7oootrns..;...

....6088-472

R5o7

loo,Ooo

ohms.. .

5of 8-fo4

RroS

470rooo

ohns..

.

6on 8-4f4

oqnof2r2oo

ot:ms

(Fun

1).......,..........

6oy B-zez

"'"'lrrooo

ol:,ns

(Run

13)....

......

608 B-102

RESISIOnS Cont'd

Descriptlon

Part No.

T

5r

t.

i

I

l

l

I

l

I

I

iP

Poge

60

sym.

RESISTOR

S Conr'd

Descrlptlon

sym.

RESISIORS

Cont'd

Description

Part

No.

Part

No.

RrIl 4r7OO

ohns, 1

watt.

...

6os

t4)+72

Rrt2

82

ohns

.

6os

g_gzo

RrI3

68o,ooo

ohms..

.

5on

g_5g4

Rr14

lrOoO

ohms

..... 60B

B_t_02

Br12 47o

ohms

6or

g_47r

R516

27,ooa

obms,

5$,

.,..,.

doa

7-273

R517

1,00o

ohns

.....

5oB

B-1o2

R5l9 12 negohms.

.... 5oa 8-ra6

."o^J

6,L

;lcaoirs

(nur

I)

.. .

5OB

i-58,

lil'vl

LO ncgolu.rs (Run

l-l)

...

5Ol B-ro5

Rr21 1 megobm,

,%.....

..... 6On

T-ro,

R522 1

megohm,

,%....,

.....

5On

7-fO5

R523

Jrloo

ohms, 2

Hatts.

..

5OB

20-332

R524

33,ooo

obms...

.

5oB 8-333

R52, 61800

ohns.

....

5or B-68a

Rr26 1

megohm.

..

....

608 8-ro5

Rr27

2,20O ohms

.....

609

9-ZZa

R 28

22rooo ohms..

.. 6os 8-az3

Rr29

l-ror000

ohms..

6oA 8-rr4

Rr30

390,000

ohms..

.

608 8-394

Rr31 l-oo,0o0

obs6..

.

5oS

8-1"04

R532

100 ohms

(nun

I only).

608 8-101

Rr33 10o

ohlos

5Or 8-ror

Rr34

47r0o0 ohris

(Added

at

Run

I3)....... 508 8-473

Rr3,

lrooO

ohms

(Aaaea

at

Run

13).....,.. 608 8-l-o2

R6or- 4?rooo

ohms..

..

60B 8-473

R5o2

l.!megohms, r%.....

.,AoyfSg>

R603 1! megohms

.....

5of 8-r:6

n5ol+ 1.! negohms,

,fi.,,.

...

5og

7-t,

R5o,

jSrooo

ohms..

..

5or

8-:6:

R5o5 fr,ooo

ohms..

..

6on 8-153

860T 2?o,ooo ohms..

5oB 8-2?4

R5oB 22orooo

ohms..

608 8-a24

R61o 2.2 rregohms

....

6oa 8-ee:>

R611

-3.3

eegohms

....

6ca 8-3:l

R(1)[

Zzraoo

ohrns, 2

r.ratts

(nun

1)........

5OB Zo-aA3

''"*-

t

27rOO0

ohms, 2 rvatts (Run

13).,..... 5On

ZO-273

ne rUI ?101000

ohms

(Run

I)

., 5or

B_27L

''"-'l

33or00o

ohms

(nun

13)

,

6os

g_:34

R51, 2r7oo ohn6

..,.. 6088,-272

p(1(

I

4r7oo obrns

(Run

I)....

...a...

5oB B-\Tz

""*"

t

I0r000 ohms

(nun

13)....

.....

6cg B-ro3

2.2 megobms.

...

608 8-225

4.1

negohns.

...

5oa

8-t+75

21200

ohms.

....

5oB 8-2Aa

loorooo

obns,

J$,

.....

6os

?-fo4

1o0r00o

obns,

56.

.....

5oB

T-104

4.7

megobms.

...

6os 8-4t5

L7orooo

ohms..

.

5og 8-)+t4

21200 ohne.

....

6os 1-eae

5r5Oo

or''s.

..,.

6og 8-552

2r!00

ohns,

7

watts.

..

6ts

zo-6

I20ro00

ohns..

.

6oe 8-ra)+

5.8 megobms.

...

6o1 8-58>

1

megohn.

......

5og 8-ro,

2.5

megohms,

Vertlca].

Llnearity

control

(

rn;lude;RaiF-

.

. . .

.

75C

a5-3

2.) megohms,

YErtical Xold controL,.

]rD

13-80

391000

ohms..

..

608 8-393

1rr0o0 ohms..

..

508

8-153

18rooo

oh&s..

..

6o1

8-183

22r0O0

ohms, I

lratt..

,

5OS tl+-ZZ3

2.2

negohms.

,..

608 8-az5

100 ohns.

......

5oB

8-101

4?orooo

ohee..

.

5oB 8-4Tl+

t

negohus,

Eeleht

control

^a\,^

R'J

12

1OO,000

:1::--s . .

jCS

8-fd+

ne,'i

r-:i';G";,";'i';;;;:.:::.::.:::.::..

s., Lu-z:t,

R5\k

Z-(OrAAa

oirins..!.,....

.;AB0-27t+

R5+5

LrorOOO

olurs..

. 60B B-I54

n5lr5

SOTOOO

ohnE,

Horiz. Drivc

c:::t:-oL...

7)C

20-31+

R64T

ro;ooo

o*.,s..l.ll.l...-.-...

-os

c-ro:

n646

2rOOO

oiurs,

,1,.,...

,.. 5oy

7-eoz

R5lr,r

1ro, ooo

oir

rs

, .

.

5oB 8-154

n55O

Zr)CAa

ohrs,

Hor.iz.

ijolcl

cont::o1

....

7i)C

L3-72

R5rr

t)r200

utr,rs,')7*..*....*....

5oy

l--giz

:;);

Ir2CO

oir s,

)ll

(p:rt

o-'

i.

;C_)

cOB

I-LZZ

R,r3

L|ZOC olssts,

5il

(pa::t

of

i,l5OL)

5Oy

7-tZZ

?5iL',

'20

otu:rs

5oB 8-121

p

icc r n^^-'T.,

r\v,/

I

".r<---L.-.

...... UUlj O-IU)

R556

)5

ohrLrs

. 5on B-55o

a65l lorOOC oh:rs,

lC

.,iat1;s.

6fn zO-3

R5r8 4r7oo oitns,

I

r.ratt.

.

.

.

5os T\)+TZ

:611

2OCrOoO

o]urs,

Foc1rs

::n'-rrl.

.

TjC 33-L

f-'650 lOO on-::s,

t-lSrl-

SSdrrrL

co:i;-cl.

.

|rC 33-2

.,r-nf

L.5 oil:rs,

!11

(nu::

I

only).

... 6Og a3-50

It"t"l3.l

ohns (nun

g)

.."..508

28-Io

iii7l 10 ncgo!:rs, 2 i.ratts.

..

5Oe 20-106

R672 I nregoirnr 2

Uaits . ....

50S 2O-I0,

R573

Inegohmr2i.ratts

.....50820-I0I

R57\

10

raegoirns,

2

r"ratts

... 6ot 2O-LC6

R57, 10 r.regoh:--s, 2 vatls

. .

. 60B 2A-1Cf

RST6

rorooc ojr:rs..

..

5oa B-ro3

R677

1.E negolr;,s, I

l,'ait,

5i,.....

. 5Ot

f3-:-8,

R58O 1.8 r,rbgohls,

1 r,'ati;,

,ril

,

,.,.

. 6Ol f3-f8,

RJBI

IOO

nc6ohr:s, I

:::tt,

?J,' ,.., .

5Og fr-fO7

R682

40 ohros,

Vert.

Centering

control....

7rC

2O-\9

o.-,stl22

ohrns, 2

riatts

(Run

1)....

,

5OB 2O-22O

"""'t

33

olurs,

2

r,ratts

(Run

13)... . 608 20-330

oep.t, f

22 oixrs,

2 rratts

(Run

1).

... .

6Ol ZO-ZZO

1\UV-F I

^-

"""'l::

oh:ns, 2

ratts

(Run

I3).... 6Ol aO-330

R6B5 22 otms, 2

yatts

...... 608 zo-zao

R5B6

58oh.-rs

*.....

.50s8-580

R5B7

IOO olrins,

894

DC

control.

,.,.

T5C

35-4

n688

lOO ohms,

creen

DC

control. ..

75C

3r-\

n689

roo ohns,

tG-oEcZntroTT ...

7jc 3j-\

n59o loo

ohrns,

frEilvEtl-TF:.t control.

...

T12c 35-z

n5rr 1oo olurs,

cr"""-yee.E-!-@g]..

T5c

35-a

R692 IOO

oh:rs,

BIue Vert.

TlIt

control...75C

35-2

R99J 100 ohms,

Red Vert. Amp.

control....

75C a5-2

Ror4 1OO

ohms,

@l !gI!.

4rrg.

cont::o1

..

75C 3r-2

R69,

Ioo ohns,

i--Iuc

Vcrt. Amp.

controf- .

Trc 35-2

R5)6

2r20o

ohr:sr2

1,'atts(Ad"ded

at

nurr:)

.

6cm ao-zzz

R597 47 oiurs

(taaea

at

Run

r3)...,,..t...

5oB 8-470

R598

8.2 ohms,

1 lrait

(aaaea

at

Run

I3).. 5oB

28-62

B7o1

47oroo0

ohms..

.

608 8-4Tl+

R702 looro0o

ohms..

.

5oB 8-104

R?03

430

ohno,

2o watts.

... 5fa f-l+a

R70[ $gg

ehns, 1o

watts.

...

5fS

aO-?

R7o5

61800

ohns, 2 watts.

..

608 ao-682

R?05

5,500

ohmE, 2 watts

...

60B

2o-55a

CAPACIIORS

elOI 120 naf,

10/, ceranic

.

9l+D

131-79

C102

30

@f,

)$,

eetaJd-c, feed-through...

94D

I31-8O

C1O3 28 nnf, I0S,

cerenle ..

94D

13I-81

C104 lrooo Enrf, cera.Ble, feed-through....

94D

131-82

CIOS 1 t6

4.5

rmf,

ceranlc

trlnmer.......

94D

131-83

C1o6

,

wf

,

ceramlc.

94D

13]-84

C107

lrooo @f,

ceramlc. ...

94D

131-85

c108

1 to

4.,

rmf, ceramic trtnmer...,...

94D

131-83

C1O9

L7

nnf,

J$

ceraaic, feecl-tbrough....

94D

131-85

C110

1.to

4.5

nnf,

eeramlc

trin&er.......

94D

131-83

U

T

R617
R518
R51g
R52o
R521

R522
R5z3

B52l+

R625
R6a5

R628

R52g

B53o

R631
R632

R533
R534
R535
R535

n53z

R538
R539
R54o

R54r

U.l

syn.

CAPACITORS

Cont'd

Description

Part

No.

s1m.

CtIl

47

onf,

1ofi, ceramle

..

94D

131-87

C112

IrOOO

Erf, ceranie,

feed-through....

9\D

131-82

CI13

30

E!nf, 2O$,

eeramlcl

feed-through..

94D

f3I-88

C114 IrOOO

mnaf, ceraroic,

N?50

tenp.coeff.

9l+D

131-89

C11,

Lr0o0

n$f, cera.n01c,

feed-through....

94D

131-90

C115 3 nmf, 10y',

cera.nl,c, NPO tenp.coeff

.

9l+D

131-91

CI1J

6.8

onf, 10S,

cera^nle, N33O tenp.

coeff.

......94D

L3t-92

C118

2

Enf,

!S

cera^mlc,

N55O teap.coeff..

94O

131-93

C119 Flne

Punlng Capacltor. Not

SuppJ-lecl

as replace-
able

part.

c120 l, uLf,

5$rcer.(9\ot3l-I

rrner

only)

94o

131-9|

C121

12 mf

,

J.OS, cera,nle

..

94D

L3L-9,

CL22

lrooo

o!f, ceranlc, feed-through....

9l+D

131-82

C123

1rO0O

@f, eeramle, feedt-through....

9\D

131-82

8.2 lmf

+

.25

wf

,

cer.

(chassis

nnnof

using

thD131-1

Tuner

only]....... 6n 6-t*

ueva\

10

md,

ceramic

(chassis

using

94D13I-2

Tuner

onry).

...,.

65c 5-:-:.5

C203

91

&nf

(Part

of taOL, 1.2AA|.

.

5rO

fo-95

c2ol+

58

umf

(Part

of

Lzot, Laoz)

.,

55o

to-97

C2O5

11500

mf

(Part

of

L2O:-, L2o2),.....

65a

1O-1Oo

C2o6

820

eef,

eera.mlc

tllsc..

......

5rO

fO-9f

C2O7

82o

nuf, cera,nic dLsc..

......

65O :-o-9r

C2O8

82o

nnf,

ceramic

clisc..

......

6ro

fo-9f

C209 .00, mf, ceramic

(aaAea

ai

p,un

I3)..

5rD tO-,

C21o

82o

rnmf,

ceraJlic

dlsc..

......

55O fO-9f

CaLL .005

nf,

ceraflic

dlsc..

....,. 55o tO-5

C2l2

820

onf,

cera&ic

alisc..

. .

. .

..

55O fo-9f

C2l3 82O

enof, ceramlc

clisc..

..,...

55D 10-91

C214

820

nmf, cera"uic tl1sc..

......

65O fO-9f

C2L5 100 eof,

eeramic

.,,...6rA

5-W

C2l6

6.8

nnf, 10S.,

eeramlc

.

55O fO-fOe

CALT

4.7

ntr.f, tube

cera^nrlc

.

65O

tO-fOf

C218

5.8

onf, 10fi, ceramic

.

5ro fo-:-oa

c279 82

nmf, 1O$, cera.nic alj.sc..

..

6rO

fO-98

C22o

5.8

mef, 1O$,

cera^nle

,

65D 5-82

C227 1r0

mnf

,

sllverlmlca

(Part

of

L211).

65y eO-S,rt

C222 .'01

mf,

ceranlc dlse,. 55o fo-3

c223 .0015 &f,

600

volts.

..

54s 8-l-8

C22l+ 10 mf,

45o volts,

electrolytlc

(c7o3c

).....

"

....

Part of

c7o3

C225

4

nf,

1r0

volts,

electrolytlc

67A 4-2

e225 .OO, mf

,

cera^ule cllec..

....,,

65A rc-,

C231

820

nmf, cera.nic

d"isc..

......

5rO

fO-9:-

c232 8eo rnf, cera^mlc tllsc..

...

..

.

55o

fo-9f

C233

820

oaf,

ceramtc ttiec.

. .... ..

55O

fO-9f

C23l+ 820

mf

,

cera.mlc

atlsc..

...... 6rp

fo-9f

C235 .O2 mf, ceramic dlec.. 55o fO-e8

C236

I.o

ef, 1oo volt8,

paper.

....

54A

1o-3

C237

eb

nrnf,

(used.

rrith

9llD131-2

tuner only)

.

5fc

6-lsz

CaOl

3,3

mmf,

cela,mlc

(Part

of Ll+o1)..... 5SO 6-8g

C3OA 12

@f

,

cera,mlc dlsc

(Part

of LlOl). 5ro

fO-91+

C3O3 .OO5 mf,

ceramlc

tllsc..

......

55O fO-,

Caol+ .0022 nf,

cera,ulc

dlsc.,

.....

55D Io-89

C3O, .O02q nf,

cera.mlc dlsc..

.....

55O

fO-89

Ca06

18o

mef,

56r

cera,mic dlec..

..

65O

lo-52

C3O7 4

rf,

50

vol-ts, electrolytlc

.

5ll.

t+-9

CaOS

390

mf,

cera,mlc.

..... Part of M3O1

C3O9

.0022 nf,

cera,mic.r......

....

Part

of M301

Ca10

.00,

Ef,

ceranlc.

..... Part

of

M3O1

Call

.O2 af, ceramlc atlse..

55D 10-28

Ca12 .O2

s!,

cera^nic dlsc..

5rD to-28

CAPACIIORS Cont'd

Descriptlon

Poge

6I

Part

No.

c3I3

47

nnf, ceranlc dlsc..

6ro lo-8o

CaI1+ .o33 nf,

5oo vo1ts. ...

5\S

8-a9

c315 .047

nof, 4oo volts. ...

544 B-a8

catS

.qo4?

mf, 500

vorts.

..

648 8-15

C31? .oO, mft

cera^nlc

dtsc..

..,.,.65o

to-l

cal8

.oo5 af, cera.mic

d1sc..

......

6rn fo-5

S33S*

;S

H;rl3'":ii:,i::ii1"*"trogtlc.

5rD r,-r38

C32OC

5

mfrl+5O volts

Ca2OD

20 nf, 2l volts

C4OI

43 rmf, ceramic d-lsc

(Part

of

L)+01) .

65t

to-95

.3.3.flmf,

ceramic

disc

(Part

of

fl+Or)

nLnc I

(nun

r)

.. .

..

.))L)

o-!r')

"'-*

16.8

mrf, cera.:nic

disc

(fart

of

f,\Of

)

(nun

13)

....62o 6-8a

1OO mf, ceramic d.isc

(Part

of

f,4OZ)

, - f

(nun

r)

....

5:o

ro-84

c403t

f8o'mnf,

ceramic

dise

(rart

of

il+02)

-

(aun

l3)....r....r

.6ra

to-52

c1+04

4

mf,

150 vo1ts, electroll'tie

57a

\-z

C405

.02 mf, cerarci.c

d.isc.. 65D

10-28

c4o5 .o05 nf, cera.uic disc

(Run

1).......

6So

tO-,

c4o7

lr2oo

@f,

10S, cera.roic dlsc...,,,,.

6>o 10-128

'C4o8

.01

nf,

lOO

volts, cera.mic

dlsc..... 55o ro-3

c4o9 .oo,

of, cera^Blc

tlisc..

, .....

651 to-,

c41o

1 0f, roo volts. ......

54a lo-3

c\11

2r\oo m[f,

)$,

mtca. ..

6Se 2o-d+2

C\12 .of

nf,

!00

volts,

cer8lolc

dlse.....

5rD

1o-3

c)+14

18

enf, cerardc

disc..

55n ro-ro4

cl+15

.o2

af , ceramic

d.lsc.. 55D 10-28

cl+15

47

umf,

cera.:nlc 6tl 6-8\

C\1?

18 Drnf,

cera:nlc

dlsc.. 55D 1o-1oL

c418 .oa trf, ceranlc

dlsc..

6rD Lo-28

c419

4?

ref, cera,mlc

disc

(Part

of

L\05). 65o to-9e

c42o

27 nwf, cera.mlc dlsc

(Part

of L4o5).

5rp

ro-93

d+22 .01 ef,

5oo

voIts, cera.nic dlsc.....

55o fo-3

c423 .oI nf,

,oo

vo1ts,

cera,nic

dlsc..... 5ro fo-3

c42l+ .01 trf,

!0o

voIts,

cera,nlc

dlsc..... 55o

fo-3

c\25 .1 nf,

5oo vo1ts1 nolded.

....

5\s 8-Z

cl+25

22

wf

,

$,

tub, ceranle. ,...

5>c

64o

c\27

22 nnf

, 4,

r,aV ceraulc.

....

6>C 5-So

c428 .01

nf, lrooo

volts,

noldeit. .

544 a-r3

c\29 .or

mf, rrooo vo1ts2 moItlett.

.

54.0, e-r3

c43o

.ol

nf, 1r0Oo

volts,

nolded. .

5l+n z-r3

CSOI

.1 mf,

600 vo1ts, moIded.. ....

5Ls

8-Z

^En^

.oO1

nf, 600 volts, mold-ed

(nun

f)..

6LB

B-tg

v)ea

U7o mof, cerem.lc

d,isc

(Run

13)......

651

ro-?o

,.01

nf,

100

voltsl ceremic d.isc

cro3{

(nun

r)..

... 65D

1o-3

t

.oot

nf, 4oo

vo1ts,

1@

(nun

13)....

0+e,

z.z\

c5o4 .1

nf, 600

vol-ts, noldecl. ....

54g B-Z

c5o5 .0047 nf,

5oo

volts, nolded. .

5l+B 8-1,

c5o6 .oo,

mf,

ceranle

cllsc..

......

5rD

10-,

C5O7 .O2

nf

,

ceramic

allBc..

55O

rc-e9

c5o8

.1 nf, 2oo volts, molded.

....

5\s 8-3g

C5o9 .o2

af

,

cera,nlc atisc. .

5rD 10-28

CrlO

3.5

-

28

nmf, Color Fldeltty.

554 4O-l

C511

.oo22

nf, cera.mic

alec.............. 65o :-o-89

Crl2 .oo5

nf,

ceraric

allsc..

......

65D

lo-)

C5l3 .oO22 nf, cerantc

dlsc.............. 5ro

fo-89

cr14 2 Mf

,

cera^mlc. 55D

5-58

CrtS .O1 Ef,

,OO

votts, ceranlc

disc..... 65O

fO-3

C5l:6

27 rl[}f,

cera,ulc

dltsc

(Part

of

T5o2) .

55o ro-93

c5L7

,o2

m!, eeranlc

dlsc.. 55O l0,-e9

I

I

st

&

:

j

\:,

-:'

:,

1

I

tr

4

';'

I

I

1,,

I

L

t:

-1

_i:i

0

I.;

r

I

?age 62

s1m.

CAPACITORS

Cont'd

Descriptlon

cot

rs

Description

Part

No.

Part

No.

Cr18 22o

nnlf,

ceramlc

disc,.

......

6rD to-83

C519

.OO22 mf

,

ceraIxlc disc.

. .. .. .

5rD tO-89

CrzO

,22

rf, 4OO vol-ts,

molded.

...

548 8-24

CrzL

.01+7

mf, 4OO vo1ts.

...

54f

8-28

C522 12 mmf, ceramlc dlsc

(Part

of L!02) . 6rD LO-9\

Cr23 .O2 ef

,

cerauic disc.

.

55D LO-28

Crdl 22O nllrlf,

mica..

655

et-eZt

C525

82 nmf,

1O$, ceranlc d,isc..

. -

5lO fo-98

c6o1 1mf, loovol-ts.

......51+A1O-3

CSAA .Oo5

mf,

ceramic

disc..

,,....5rD

to-,

c5o3

.ool-

mf, r,5oc

volts

,.

6\A

e-z9

c6o4

150

md.

part

of M6o5

C60r- .01 uf....

.....

Part

of M5o,

C6o6 .22 nf

,5oo

vol-ts,

molded.

...

5t+g 8-l

C5o7 .oo, mf, cera.:ntc disc..

......

6rO ro-,

c5o8 .oo1 mf,

4oc volts,

tofi,..

,.,

O+A

2-2\

C5O9 .Oo1 nf,

4oo

volts, Lo11,,,.

.,,

6\A 2-2\

c51o .005

mf,

ceramlc

disc..,.....

65arc-:-

C611

.04?

nmf,

2oO

volts

...

64s 8-l+f

c6L2

.oo47 &f, 600 votts,

nolded.

.

64t 8-:->

C613 .oo1 rf, 5oo vo1ts,

motded.

..

548 8-19

C51l+

.oot

nf,

5oC vofts, nolded.

..

648

8-19

C6l5

50

mnf,

J!0

volts,

electrolyttc

(c32oB)

.....

6lt rr-r38

6

.O1 :.:i,

UOO volts,

mo}lcd

c

;tl

{

(nun

:-)

..

.

.

.

r-.D

J-Lr

t

.OO.:.7 rf

,

rOO volt; (riun

13). .. . ... .

(\s

''-t,

c5L9 .ool"5 uref, 600 1ro1ts,

molded. .......

648 8-18

c62o

.L2 taf,50o volts, 10$, molded.,..., 6\B 22-l+3

c62t

.033

nef, 5oo volts

...

5\B

22-10

C522 .33 nf, 200 voIts,

to$...

..,,

6\e zz45

c54 .016 n$t,4oo volts, Lq..,

..

64s

ea-44

c52\

.0027

!,uf, tr5oo

volts, Lofi,........64Aa-37

c52, .l- mf, 600 vo1ts,

molded.

....

548 8-T

c626 .oo39 mf, 1O$, mlca

(part

of L5o1).. 55I. zo-392

c627 22

nnf

,

I$,

atca

(Part

of

L6ot)..,.

6rn

2L-zzo

C628 220 umf, ceraml"c disc..

...... 5:O fO-83

c629 470 msf, 1O$,

mlcs.

...

65t 2L-)+7L

c53o

.oI

mf, 600 volts,

molded.

...

648 8-13

c63l

"1

mf,

2oO volts,

molded.

....

64a

8-:g

C532 82 rmlf, 1oS,

ceramlc

disc..

..

65D

10-98

c663

5

mf, \ro

volts

(ca2oc)......

6TD

rr-138

c53l+ .1 mf, 5oo volts,

molded.

....

5)+s 8-Z

C635 .22

rtrlrf,

5OO volts,

molded.

..

64S 8-:

C$6

25o

nmf

, 3

Kv,

5*,

ceramlc

dlsc.....

55O 10-11l+

C63l 2ro mnf,

3

:KVt

5f,t

ceramlc

dlsc...,.

6ro lo-lt4

C538 .l+? $nf, 2oO vo1ts, t4...

.".

6+8

22-35

c$9

.47

nnnf,

2oo

volts,

1q,.. ... 6\8 22-35

C64O

.1

nf, 600 vo1ts,

nolded.

....

54S 8-Z

C541 .1,

orf,

5oo

volt8,

nottled.

..

6l+8 8-25

C5\2

,6

nuf

,

,rOOO

volte,

ceramic

d.lsc..

.

65O tO-l25

C6\3

.04?

nnlf, 600 volts,

molded.

,

6\t 8-g

C5&4 .0033 onrf, 500 volts, nolded. 54S 8-f5

C6\, .39 mn0f, 2oO volts,

ll)4..,

,..

6\8 22-\e

c5,+6 .39 nnf

,

2OO voIts,

1G4 .,.

...

6l+9 22-\2

c5\7

.)+?

mnf,

2oo vo1ts, :-o{p...

.,.6\n ez4,

c648 .47 mmf, 2oo vo1t6,

74..,

...

5\.8 22-35

C70I .o47 Dr[f, 5oO

volts,

nolded.

.

544 8-g

CTOA

.0\7

nmf,

5OO volts, nolded.

.

6\g

8-g

C?O3A 80 nf,

)+rO

volts

I

C7038 10 dr

350

volts

felectrolytlc.

,....

6lO

15-t37

C7O3C

10 mf,

l+50

volts

J

c704A

100

mf,

4r0

volts)

etectrolytlc .....

57D rr_135

c?o4B

50

trf,

45o

_volts /

C7o7 .o\? runf,

5OO

vo1is,

molded. .

6M

e46

U

L201 4f.25 MC

i;;;

;;'.;;';Z

rraP coir'

"

728

t6\-t

L2O3 Choke

Coif.

.,.,

738

d+-3

L2o4 Choke Coir.

....

738

2L-3

L2O5

l+L.z,

MC

Trap

Coi1.

,.,

728

L66J-

L2O6 Peaking Coil..

.

73!.,-27

L2O7

43.'

MC Choke.

73B

2l+-1

L2O8

Peaking Coil..

.

738

25-,

L2O9 De.l-ayLlne

...".

?28

158-1

L21O Peaking Coil-..

.

73B 5-31

L211

3.r8

MC Trap Coll.

..,.

72D

L6r-,

L2l.2

Peaking

Coif..

.

738

5-28

L213

Peaklng

Coj.1.. .

73B

r-27

U

L2r7

1

L2t8

|

Ctrote, Fila.nent.

..,,..

73A

2-,

LzLg)

L3O1 Sound Takeoff Coll-.

...

728

I57-L

L3O2 Peaking Coil..

.

738

2r-7

L4Ol

4.5

MC Sound

Trap Coi1..

,,...

72D

L6r-2

L4o2

l-st Chroma

cotl..

....

.

72D

L5r-7

r,403 choke

(5

Mc). ..

T3B

2\-6

il+o, Output Chrona

Coil.. ..728

763-l

L4o6 Phase Shift coll-.. ...,

?28

118-1

L1+O7.

l4o8

|

ci,ox.

3.6

MC

Resonent.

738

2\-5

Ll+o9

l

L5O1 Burst Amp. P1ate Coif.

72B

181-1

LrOz Reactance Tube

Plate Co11..

..

728

t 6-t

l5o3

Peaklng

Co11..

.

73B r-28

L5Ol- Eorizontal

Osclllator

Colt..

9)+C

17-11

L6oz chokecoil .

....RB33-1

L6C8 choke col].

....

738 33-1

L5O4

Eorizontal-

Red Anp.

...

9l+B

133-2

L5o, Eorizontal Red T11t.

..

948

133-1

\606 fiorlzontat Green

Aep.

94B

133-2

L5o7 Horlzontal Green Tirt.

94B

133-1

L6o8 Eorlzontal Blue

Amp.

..

94B

133-2

L5O9 Eorizontal B]-ue Tilt.

943

133-1

L51o Eorizontal tunlng Co11..

.."..

9l+B

114-3

L7o1 Power Supply

Fllter Choke.

...

7\B

18-20

Trap Coil

(Series

tuned)

.....

94D

131-11

Tuning Core

(for

L1o1).

......

94D

\37-71

Channel Coil

(Starped

2Nl+,

3N4,

l+t14,

etc .

)

for Channel

#2.......

94D

L3L-52

for

Channel

#1.......

9l+D

131-13

for Channel

#t+.......91+D

131-54

for channel

#r...,... 94D

L37-5,

for channel

#5...

..

..

94D

L3L-56

for channel-

#1.......

94D

L3t-r7

for

Channel

#8.......

94D

131-18

for

Channel

#9.....

..

94D

L3l-r9

for

Channel

#1o......

9l+D

131-50

for

Channel

#tt......

9\D

131-51

for channel

#7?......

94D

t3t-52

for channel

#t5......

94D

131-53

Trap

Coi.l

(Paral-l-ef

tuned) ...

94D

131-64

Screen coll..

..

94D

Bt-65

Mlxer

Pfate Co11 ..

....

9l+D 8l-56

Tuning

Core

(for

Llor)

.

......

94D

131-78

RF

Choke Coil..

9l+D

131-57

sym.

L101

Ll02

Ll03

L104

Ll05
L]06

!.

fl

il

,l

:]

syn.

TRANSFOR'SERS

Deseription

Part No. svn.

illl5C.

CHASSIS PARTS Cont'd

Descriptlon

Poge

63

Part No.

TIol

Antenna Input Assembly.... ...

94D

131-68

T2oI IF

Input

Transforuer. .

72D

t5l-l

T2O2 lst

IF Transformer. ..,

72D

1I1-4O

T2O3

2nd

ltr'

Transformer. ...

728

Lr\-L

T20l+

Jrd

II'Transformer. ,..

72D

111-39

T2O, IF

Output

Transforner.

728

Lr9

\206 tuminance

Compensation Transforner. .

728

I57-L

T3Ol" Batlo Detector

Transformer.....

....,

72C

68-2

T3O2 Audlo

Output

Traneformer. .,..

795

65-7

TL01

2nd

Chrona Transformer, ..,,..

72}-

Lrr-l

'I5OZ

Sub-Carrler

Oscillator. ......

728

178-1

il83if

,"n"

Assembly.

e4D

132-1

'1502

Eorizontal

Output

Transformer.

......

79D

69-2

T603 Vertical

Output

Transformer.

.

79C 72-l

T?01

Power Transformer.. ...

BOc

53-f

PJ-ug, Yoke.

....

88.e.

g-4

P1ug,

Pol€ Piece Assemb1y....

88A 2o-1

Switch,

AC....

.

Part

of

RJOS

C1ip, Contact

(Insulatlng

Cone) ....

188 1?8

Connector,

Plate cap

(53KL).

88c

t5-65

Das

Sprlng.

...

19A 121

Eolder,

3/10

AEp Fuse..

.....

841 m-e

Eolder,

S/A

arrlp Fuse..

......

84A' fa-4

Eolder,

2 Amp Fuse.

..

841 ra-5

Insulatlng

Cone,

Palnted

(picture

tube)...

33C

279

Insulatlng

Cyllnder,

E.v.

(3A3

tube)......

338

215

Insulatlng Ring

(plcture

tube)

.....

333

155-1

fnsulator,

Rlm Magnet.

......

33A

175

fnsulating

Knob

(focus

end

centerlng

controls)

...

33A

196

Magnet,

Blue

Lateral

.

94A

135

Magnet,

Purity.

......

9)+A

104

Magnet

Assembly, Rin...

....

"

948

135

Pofe Plece Exciter

Sprlng.

..

188 1?o

Pole Plec€ l{old-er.

...

18A 169

Pole Plece Retatner Sprlng.

,

338

2L6

Rubber Channel

(Yoke

Bracket)....

..

l2A

9-I5

Shielti,

Tube

for

7

pin

niniature.

.,

87C

7-L9

for

!

pin

miniature.

..

87c

7-2O

for

P

pln

(rone).

,,..,

87c

7-25

Socket, Tube

I

pin

mlniature...

....

87A

39-1

!

pin

nlntature...

..,.

871' Zr-l

7 Bin,

shiel-d base.

...

878 23-4

7

pln,

Ehierd base

(v3oz,

6ts.5).....

8te rl+-7

9

pinr

Ehield

base..

..

87l 23-2

9

pln,

for

v5o7

(uica).

......

338

142

?

pin,

for v5o3

(ttlca)

87A

39-3

octal,

for V505

(urca).

......

878

3o-7

octa],

for

v5or,

5o9,

303,

7o1

e1o2.

87A

,-L

Octal, for

v5o8

(with

shield)

eTe

5r-:

Picture Tube.

.

.

8?A

,3-3

}IISC

PARTS FOR TUNERS

ghleld,

tube.

.

9t+o

rSr-50

Screw, Trimner

(l+154/\")

..

9\D BL-69

Nut,

Loeklng

(for

trlmner) ......

...

98A

4r-3I

Bracket,

Fine Tunlng.

9l+D

110-92

Turret Assenbly, I,ess Col]-s.

94D

L3L-72

Spring, I,Iiper.

9\D

131-73

Cover,

Bottom.

94D

131-?4

SIug, Oseitlator

Tunlng.

....

98A

4r-88

sprlng, Slug

Retaintng....

..

98A

4r-r2

P501
P604

6?01

t)

I

itr

:

a

T

UN ERS

VHF Tuner

(used

in early sets).

...

9\D

13t-l

VHF Tuner (used

in later sets).

,..

94D

I3t-2

VHF-UHF

Tuner.

....

94D

107-1

\t

ftilsc.

cHASsrs

PARTS

CR2O1 Crystal, Luminance

Detector.

.

93A

8

CR2O2 Crystal,

Sound & Chrons

Detector....

93A

8

CRrol

Crystal,

3.58

MC

Oscill-ator

(wi.rea

rn)...

......

938 3-3

CR!01 Crystal,

3.58

MC Osellfator

(erus

rn)

...

938 3-l+

Cn5ol

Diode, Dual Selenlum

..

93A

5-2

F5oI

Fuse,

3/4

Anp...

...,..

8\l r3-9

F5ol+ Fuse,

3/ro

Anp...

.....

84e r3-5

F?o1 Fuse, 2 Amps..

. 8l+A

13-14

Plug,

Yoke.

....

884

9-4

Socket, Convergence Yoke..

...

88A

20-2

Cable, Eigh Voltage

Anode.

...

889

34-fo

Plug, Itr' Input

Cable.

.

88A 2-,

Sound

Coupfate....

....

63c

5-t5

Socket, Speaker.

......

8?A

l+-4

Plug,

Speaker.....

....

884

3-7

J5o1
J602

J5o3

M201
M301
M302
M303
M3o4
M305
M6o1

M6oa

M5d+

M5o,

MTo1

M702

M701+

Speaker

A66eeb1y.

.....

see.cablnet

Spring,

Drum Retalner"

" '

"

94D

131-70

'

Parts

Fine

Tuning sbaft

and

Cam

Assem.

.

..

94D

131-71

Yoke Aseembly.....

....

9UD

132-1

Ei.gh

Voltage Interlock Sulteh. ..

-.,.

76A

3,

PoIe

Pleee

Asselobly.

..

94D

134-I

Sync Coup1ate.....

....5:C

0-e

Line Cord &

Plug

Assembly.

...

89A 22-l.

Socket,

AC Power.

."...

884

35

Sprlag

and Ro11er, Detent.

.'

9LD

131-7,

Pilot

Light.

.... See Cablnet

Parts

Sprlng, furret Groundlng.

...

94D

L3L-76

\t

Poge 64

F.-

\o

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SCHEMAIIC

NOTES

@

@

."0

@"rc.

indicate alignrnent

points

and alignrnent

connections.

Fixeij' resistor

values shown in

ohms

tLO%

tolerance, L/2 watt; capacitor

values

shown

in rnlcromicrofarads

lZOolo tolerance

unless otherwise

specified.

NOTE:

K=R

X 1, 000,

MEG=R

X

1, 000,

000.

MF=

rnicrofarad.

CONDITIONS T'OR

MEASURiNG VOLTAGES

'W'arning:

Pulsed high voltages

are present

at

the

caps of

V605, Y607,

V608,

Y609,

and at

pin

3 of

V606.

Do not

attempt

to rneasure

voltages

at

these

points

without

suitable

equiprnent.

A

VTVM

with

a

30,000 volt high voltage

probe

should be used

when

heErsur-

ing

plcture

tube high voltage

(to

ultor ring).

Set the

CHANNEL SELECTOR on an unused channeL.

CONTRAST

and

COLOR

INTENSITY controls {ully

clockwise.

BRIGHTNESS

and

VOLUME

controls

at

rninirnurn.

All other controls at

norrnal settings.

O

Antenna disconnected

and

terrninals shorted

together.

O

Line voltage: 117

volts AC.

O

DC voltages rneasured

with

a

VTVM

between

tube

socket

terrninals

and chassis,

rrn-

Iess otherwise

indicated.

o

Yoltages at

Vt01

and

Vl02 measured

frorn

the

top

of the

tuner

with

tubes

ln socket.

Use

of

an

adapter

is

recornmended.

O

Yoltages

at picture

tube

are

shown

with SCREEN

and

GRID

controls set

at

rninirnurn

and

rnaxirnurn.

CONDITIONS

T'OR

OBSERVING

WAYET'ORMS

Warning:

Pulsed

high

voltages are present

at

the

caps

of

V605, Y60?, V608, V609,

and at pin

3 of

Y606.

Do not

atternpt

to observe

waveforrns

at

these

points

unless

suitable

test

equipment is

used.

O W'aveforms should resernble

those shown on

the

schernatic.

o

'Wavefortns

are

taken with a

transmitted black and.

white signal lnput

to

the television

chas sis.

O

Set

all

controls for norrnal

picture.

o

Oscilloscope sweep

is set at

30 cycles for

vertical

waveforrns and

at7,875 cycles

for

horizontal

waveforrns,

to

pernrit

2

cornplete cycles

to

be observed.

O

Peak-to-peak

voltages will

vary

from

those shown on

the

schematic, depending on

the

test equiprnent

ernployed

and

chassis

parts

tolerances.

O

Chrorna waveforrns

shown are

the result

of

injecting

a

signal from a

typical

color

bar

generator.

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to-56