Magnavox ct 214, ct 218, ct 221 schematic

PHOTOFACT*

Fold

er

MAGNAVOX

CT-214,

CT-218,

CHASSIS

CT-221

VOL.CONT

ON OFF

TRADE

MANUFACTURER TYPE TUBES

POWER

Alignment Block

Circuit Linearity Parts

Parts

SW.

BRIGHTNESS

CONT.

HOLD

NAME Ilagnavox Chassis

SET

Twenty-three

Ilagnavox

Television

SUPPLY

105-125

Co.,

Volts,

Instructions

Diagram

Modifications

Adjustments

List

and

Description

List

(Tuner-Chassis

List

(Tuner-Chassis

18 18

Photographs

Cabinet-Rear View Capacitor

Identification

Chassis-Top

23

View

3

Horizontal Sweep Compartment

HOWARD

"The listing

of any

available case a recommendation, as

to the

quality parts have Inc.,

by the

"Reproduction

and

been

compiled

manufacturers

or

suitability

use,

without

replacement

warranty

or

guaranty

of

such

from information

of the

particular type

express

replacement

permission,

VERT.

2131

Receiver

CT214,

60

cycle

HORIZ.

HOLD

CT218,

Bueter

Rd.,

AC

CONTRAST

CONT

CT221

Fort

Wayne,

RATING

2.0

INDEX

Page

6,7,8

Photographs (continued)

24 RF

16,17,18

CT214)

CT221)

22

15

12,21

23

W.

SAMS & CO., INC. • Indianapolis

part

herein

does

not

constitute

by

Howard

furnished

of

W.

part.

The

to

Howard

replacement port

of

editorial

in any

Sams & Co., Inc.,

numbers

of

these

W.

Sams & Co.,

listed.'*

or

pictorial con-

Tuner

RF

Tuner (Chassis

RF

Tuner (Chassis Resistor Trans.,

Identification

Schematic Schematlc-RF Schematlc-RF Tube

Placement Chart

Voltage

tent,

in any

the

use of the Sams & Co., ternational Union

FINE

TUNING

Indiana

Amps,

(a)

117

Volts

(Chassis

CT214) CT218) CT221)

Identification

Inductor

and

Alignment

(Complete Receiver)

Tuner

(Chassis

Tuner (Chassis

and

Resistance

7,

manner,

is

prohibited.

information contained herein. Copyright

Inc., Indianapolis

Copyright Union.

(1910)

by

Howard

DATE

No

/,

Indiana,

All

rights

W.

Sams & Co., Inc."

5/49

4910-13

CHANNEL

SELECTOR

Page

14,19

4,9

CT214) CT221)

Indiana

patent

liability

is

assumed with respect

1949

by

#62

Howard

in U. S. of

FOLDER

America

U.

S. of

America. Copyright under

reserved under Inter-American Copyright

Printed

SLT

11

10

22 15 20 13

13

5

2C

W.

to

</>

to

In-

THE

COOPERATION

RECEIVER

MAKES

A

PHOTOFACT STANDARD

IT

©

Howord

OF THE

POSSIBLE

W.

MANUFACTURER

TO

BRING

NOTATION

Sams & Co., Inc.

OF

YOU

THIS SERVICE

SCHEMATIC

1949

THIS

PAGE

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®

CT-221

CHASSIS

CT-218,

SISSVHO

dOl

MAGNAVOX

CT-214,

M3IA

CHASSIS

BOTTOM

VIEW-TRANS.,

INDUC"

PAGE

4

JCTOR

AND

ALIGNMENT IDENTIFICATION

PAGE

9

RF

TUNER-LEFT

SIDE

RF

TUNER-RIGHT

SIDE

PAGE

5

ANTENNA

.01MFD

1.

2.

.01MFD

3.

.01MFD

4.

horizontal

ANTENNA

1.

2.

which SAKKES Connect

RCA

General

ANTENNA

5.

6.

7.

8.

9.

10.

11.

12.

for and

spurious

ANTENNA

13.

DUMMY

High

(Grid) L.OW

High

(Grid)

Low

Use

frequency

DUMMY

.01MFD

High

(Grid)

Low

.01MFD

This

receiver

tuner

TARZIAN

the

or

GENERAL

Instrument tuner)

Set

.the

DUMMY

See above

Connect horizontal To

inject

Gen.

Instr.

beats

DUMMY

See listed

TO

SIGNAL

GENERATOR

COUPLING

side

to Pin 1

of

6BA6

side

to

chassis.

side

to Pin 1

of

6BA6

side

to

chassis.

modulated

deflection.

SWEEP

GENERATOR

COUPLING

side

to Pin 1

of

6BA6

side

to

chassis.

employs

is

being

TUNER: Remove

high

side

INSTR'.'MENT:

contrast

Instructions

the

control

SIGNAL

GENERATOR

COUPLING

.

» "

• " " " »

syncronized deflection.

signal

in

Tuner

.

SWEEP

GENERATOR

COUPLING

Instructions

above.

DISABLE

used,

construct a dummy

ALIGNMENT

HIGH VOLTAGE REMOVE HORIZONTAL OSCILLATOR TUBE

GENERATOR

(Vll

(V10

signal

(V10

one of

and

of the

signal

Inject

accessible

to

GENERATOR FREQUENCY

sweep

Sarkes Tarzlan

GENERATOR

SOUND

IF

SIGNAL

FREQUENCY

21.25I1C

21.25MC

SOUND 1 ALIGNMENT USING

with

SWEEP GENERATOR FREQUENCY

21.25I1C (450KC

Sweep)

three

inject signal

the

oscillator

generator

signal

approximately

SIGNAL

21.25MC

19.75I1C

27.25MC

21.8

MC

25.3

MC

22.3

MC

25.2

MC

23.4

MC

voltage

SWEEP

FREQUENCY

24MC

(10MC

Sweep)

ALIGNMENT

CHANNEL

Any

BO^modulation

MARKER GENERATOR FREQUENCY

21.25MC

RF

tuners.

as

tube

across

through

hole

-3

CHANNEL

Any

» » » "

• « »

OVERALL

from

tuner,

loop

mixer

MARKER GENERATOR FREQUENCY

19.75I1C

21.25MC

25.75HC

27.25MC

INSTRUCTIONS

USING

CONNECT

VTVM

Probe

to

Common

s.

f

"

DC

Probe

Meg.

to

Probe

Meg

to

FM

SIGNAL GENERATOR

and

CHANNEL

Any

IF

ALIGNMENT

To

inject

(V3)

and

coil

mixer

in side

CONNECT

VTVM

Probe

to

Common

assls.

" » « » " » "

IF

RESPONSE

generator

turns

as

shown

CHANNEL

Any

thru

thru Point

450KC

and the low

to

1

Common DC

1

Common

VIDEO

outlined.

to the

the

volts.

f

VIDEO

the

sweep

a few

tube

AM

SIGNAL

GENERATOR

ADJUST

Al,

Point

to

chas-

A3, A4

AS

.

Point

<$>.

chassis.

AS

..

<£>

chassis.

sweep.

CONNECT

SCOPE

Vert.

imp. <K>

to

chassis.

top. to

<^

to

chassis.

the

-signal

Low

to point side

Vert.

point side

fashion a coil grid

resistor

of

chassis.

ADJUST

Point

A7, A8

A9 A10

All

A12 A13

A14

A15

CHECK

to the

of

hookup

in

Figure

CONNECT

SCOPE

Vert.

top. to

point

<TJ)

Low

side

t5

chassis.

A2

AND

Use

A5,

Into

of

side

to

(point

Adjust

horizontal

wire

5.

Remove

(V18)

FROM

AND

VTVM

Adjust

for

maximum

Adjust

for

reading

of the

much sawtooth

Adjust symmetry

A6

Adjust stralghtness per over pattern.

the

video

hookup

wire

chassis.

L for

for

,,

for

„ „

„

n

ii

zero

RCA

minimum

maximum

negative side quired

OSCILLOSCOPE

120%

ADJUST

Al, A2, A3, A4

amplifier

around

the

oscillator

ADJUST

Check Is

similar slightly and

SOCKET.

REMARKS

deflection.

"

reading. A positive

will

correct

adjustment,

fig.

point occurs

IF

be

setting.

repeat

voltage

In

REMARKS

for

maximum

as per

fig.

A5 for

maximum

of

crossover

2.

Adjust

Continue with channel , determine

around

the

tuner

and

REMARKS

reading.

deflection.

rt

n

of the

mixer

tube.

For the

tube

REMARKS

to

-see

that

to

fig.

retouch

15 to

All,

obtain proper curve.

obtained

mixer

If A6 re-

steps

scope

for

amplitude

1.

amplitude

A6 so

at

center

Step

tube.

on

lines

cross-

point K lor

oscilloscope

RCA

to

prevent

response

3. If

pattern

necessary,

13,

13, 14,

and

either

3 & 4.

and

of the

5.

and as

PA3E6

FIG.

3

NOT

MORE

CAREFULLY

AT CONNECT PIN 4 WHICH AT OTHER SHOWN.

RIGHT

PINS

THE

SOCKET.

COMPONENTS

BEND

ANGLE.

516

IS

GROUNDED CONNECT

PINT

TO

AS

DUMMY

FIG.

5

MIXER

TUBE

SOUND

MARKER

2

THAN

20%

_}_

FIG.

VIDEO

MARKER

4