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.