Zenith A2245E Disassembly Instructions Manual

PHOTOFACT*

Folder

DISASSEMBLY

INSTRUCTIONS

CHASSIS

REMOVAL

1.

Remove

4

push-on type knobs

from

the

front.

2.

Remove

6

metal

screws

from

the

rear

cover. Remove

the

rear

cover.

3.

Remove

4

metal

screws

holding

the

tuner. Remove

the

tuner.

4.

Remove

2

metal screws holding

the

control bracket.

5.

Remove

the

speaker

leads.

6.

Remove

4

chassis

bolts

from

the

bottom.

7.

Remove

the

chassis.

MODEL

A2221YlCh.

17A20)

TRADE

NAME

Zenith

MODELS

CHASSIS

MANUFACTURER

TYPE

SET

TUBES

POWER

SUPPLY

TUNING

RANGE

A2221J,

Y,

A2223E,

H, R, Y,

A2245E,

R,

A2250M,

R,

A2251E,

R,

A2282E,

R,

A2673E,

R

17A20

A2221JU,

YU,

A2223EU,

HU, RU, YU,

A2245EU,

RU,

A2250MU,

RU,

A2251EU,

RU,

A2282EU,

RU,

A2673EU,

RU

17A20U

A3001E,

H, R,

A3006E,

H, R,

A3008E,

R

17A20Q

A3000E,

R.

A3004,

E, R

17A21Q

Zenith

Radio

Corp.,

6001

Dickens

Avenue, Chicago

39,

Illinois

Television

Receiver

Seventeen

110-120

Volts

AC, 60

Cycle RATING

185

Watts,

1.6

Amp.

Volts

AC

Channels

2

thru

13

VHF,

14

thru

83

UHF, Video

IF 45.

75MC, Sound

IF 41.

25MC

(Intercarrier)

SERVICING

IN THE

FIELD

TUNER

OSCILLATOR

ADJUSTMENTS

Touch-up

adjustment

of the VHF

oscillator

is

possible

by

removing

the

channel

selector

and

fine

tuning knobs.

Set

the

fine

tuning

at the

center

of its

range.

The

adjustments

(located

in a

circle

around

the

shaft)

should

be

made

in se-

quence

from

the

highest

to the

lowest channel

in the

area.

Channel

13

adjustment

is

located

at 12

o'clock, proceed

in

a

counter clockwise direction adjusting

for

best

picture

and

sound.

PICTURE

TUBE

SAFETY

GLASS

CLEANING

Remove

4

push-on type knobs

from

the

front. Remove

4

metal

screws

holding

knob

escutcheons.

Tilt

the

safety

glass

out at the top and

lift

to

remove.

SPECIAL

ADJUSTMENTS

A.

AGC

Observe

the

picture

and

advance

the AGC

control

to a

point

where

the

picture

distorts

or a

buzz

is

heard

in the

sound.

Back

off

from

this

setting

until

the

picture becomes

stable

with

no

noise

in the

sound.

B.

Fringe Lock

Turn

the

fringe lock control

fully

clockwise,

then

counter

clockwise approximately

1/4

turn.

Adjust

picture

to

lock

in

with

hold

controls.

If

picture

jitters,

tears,

etc.

adjust

fringe

lock counter clockwise until

stable.

Readjust

hold

controls

and

check operation

on all

channels

in the

area.

C.

Focus

The

focus

may be

varied

by

means

of a

focus

control.

(For

location,

see

tube placement chart).

D.

Width

The

width

may be

varied

by

menas

of a

metallic

sleeve

lo-

cated between

the

yoke

and the

picture tube neck.

Adjust

sleeve

in or out of the

yoke

for a

picture

SLIGHTLY

larger

than

necessary

to

fill

the

screen.

HORIZONTAL

OSCILLATOR

FIELD

ADJUSTMENTS

The

horizontal

oscillator

coil

is

used

as the

horizontal hold

control.

Adjust

the

horizontal hold until

the

picture

syn-

chronizes horizontally. (For location,

see

tube placement

chart).

SOUND

IF

DETECTOR

BUZZ

ADJUSTMENT

To

eliminate audio

detector

buzz, adjust

the

buzz control

for

MINIMUM

buzz

and

maximum sound. (For location,

see

tube placement

chart).

FUSES

One

fuse

is

used

for

horizontal sweep

circuit

protection.

(For

location,

see

tube placement chart).

CENTERING

Centering

is

accomplished mechanically

by

adjusting

two

magnetic

rings

around

the

neck

of the

picture tube. Rotate

the

two

rings

around

the

neck

of the

tube until

the

picture

is

properly centered.

HOWARD

W.

SAMS

&

CO., INC.

The

listing

of any

available replacement part herein does

not

constitute

in any

case

a

recommendation, warranty

or

guaranty

by

Howard

W,

Sams

&

Co.,

Inc.,

as to the

quality

and

suitability

of

such replacement part.

The

numbers

of

these parts

have

been compiled

from

information

furnished

to

Howard

W.

Sams

Si

Co.,

Inc.,

by the

manufacturers

of

H389

•

Indianapolis

5,

Indiana

the

particular

type

of

replacement part listed. Repro-

duction

or

use,

without

express permission,

of

editorial

or

pictorial content,

in any

manner,

is

prohibited.

No

patent

liability

is

assumed

with

respect

to the use of the

informa-

tion

contained

herein.

©

1958

Howard

W.

Sams

&Co.,

Inc.,

Indianapolis

5,

Indiana

.

Printed

in

U.S.

of

America

o

m

70

DATE

3-58

SET

393

FOLDER

4

TUNER

SCHEMATIC

\D

ON

PAGE

5.

VHP

TUNER PART

IS-41682

ITOPVIEWI

SWITCH

ON

BI-STABLE

RELAY

21

2?

REMOTE

CONTROL

_TRANSFORMER

PRIMARY]

-i

REMOTE WIRING

FOR

CHASSIS

I7A20Q

PQ-1

SOCKET

ON

REMOTE (ONE

WAYI

PLUG USED WITH

CONTROLCHASSIS

PART

IS-41940

REMOTE CONTROL

USED

ON

CHASSIS

17A21Q

ONLY

CHASSIS

PART

IS-41941

I

MEASURED

FROM

PIN 7 OF V2.

6

SEE

PARTS

LIST

FOR

ALTERNATE

VALUE

OR

APPLICATION

DC

COIL

RESISTANCE VALUES

UNDER

ONE OHM

NOT

SHOWN

ON

SCHEMATIC DIAGRAM

ARROWS

ON

CONTROLS INDICATE CLOCKWISE

ROTATION

(CONTROL

VIEWED FROM SHAFT END)

WAVEFORMS

TAKEN

WITH

CONTROLS

SET

TO

PRODUCE

50

VOLTS PEAK-TO-

PEAK

SIGNAL

AT

PICTURE

TUBE.

voltmeter;

AC

voltage measured

at

1000

ohrns

per

volt.

2. Pin

numbers

are

counted

in

clockwise direction

on

bottom

of

socket.

3.

Measured

val

4

Line

Vo

5.

All con

taqe

rols

s

se

stated.

maintained

at

1

17

et

for

normal

oper

pin to

commor

volts

for

ation;

no

roltage

signa

negative

read

app

ngs.

ied.

A

PHOTOFACT

STANDARD

NOTATION

SCHEMATIC

Ho»«J

W.

S«ms

S

Co.,

Inc. 1958

PAGE

2

TO

CAP OF

Vll

(HORIZ.

OUTPUT)

HV

TRANSFORMER

TERMINAL

LOCATION

ZENITH MODELS A2221J,

JU, Y, YU,

A2223E,

EU, H, HU, R, RU, Y, YU,

A2245E,

EU, R, RU,

A2250M,

MU, R, RU,

A2251E,

EU, R, RU,

A2282E,

EU, R, RU,

A2673E,

EU, R, RU,

A3OOOE,

R,

A3OO1E,

H, R,

A3OO4E,

R,

A3OO6E,

H, R,

A3OO8E,

R

(Ch. 17A2O,

O, U,

17A21Q)

PAGE

23

TUBE

PLACEMENT

CHART

OFF-ON

IPUSH-PULU-VOL

> N

0|o^

O

u

<_

££c

> M

sa

<•>

m

X

O

C'

O

_

I

00

»

C

TUBE

FAILURE CHECK

CHART

3-

M

»

L

*

-<

The

following

chart

lists

tubes whose failures

are

most likely

to

produce

the

indicated

symploms.

Refer

to

tube placement

chart

for

location

and

type

of

tube.

POWER

SUPPLY FAILURE

No

raster,

no

sound

-

V14

LOSS

OF

PICTURE

OR

SOUND

No

pic,

no

sound,

has

raster

-

VI,

V2,

V3,

Mode

(M2),

V4

No

pic,

no

sound,

has

snow

-

V201, V202,

VI

No

pic,

has

sound,

has

raster

- V4, V15

Has

pic,

no

sound

- V4, V6, V7

Overloaded

picture

- V5

SYNC

FAILURE

No

vert,

sync

-

V5

No

horiz.

sync

-

V5,

V9

No

vert,

or

horiz.

sync

- V5

SWEEP

FAILURE

No

raster,

has

sound

-

Fuse

(Ml),

V9,

V10,

Vll,

V12,

V13,

V15

•

No

vertical

deflection

- V8

Poor

vert,

linearity

or

foldover

- V8

Poor

horiz.

linearity

or

foldover

-

V10,

Vll,

V12

Narrow picture

-

V10,

Vll,

V12,

V14

Vert,

off

freq.

- V8

Horiz.

off

freq.

- V9,

V10

-

Cs™

a'*.

m

>

> c

1-

'

O

»

m

C

o

m

JO

SET

393

FOLDER

4

PAGE

3

ALIGNMENT

INSTRUCTIONS

PRE-ALIGNMENT

INSTRUCTIONS

Allow

a 20

minute

warm-up period

for the

receiver

and

test

equipment.

VIDEO

IF

ALIGNMENT

Connect

the

synchronized sweep

voltage

from

the

sweep

generator

to the

horizontal input

of the

oscilloscope

for

horizontal

deflection.

The

sweep

generator output lead should

be

terminated with

its

characteristic

impedance, usually

50

ohms.

DUMMY

ANTENNA

470mmf

Direct

SWEEP

GENERATOR

COUPLING

High

side

to

point

^>

.

Low

side

to

chassis.

High

side

to

ungrounded

tube

shield

floating

over

mixer-oscillator

tube

(V202).

Low

side

to

chassis.

SWEEP

GENERATOR

FREQUENCY

44MC

(10MC

Swp)

MARKER

GENERATOR

FREQUENCY

39.

75MC

41.25MC

45.

75MC

39.75MC

41.

25MC

47.

25MC

41.25MC

42.

75MC

45.0MC

45.75MC

CHANNEL

Between

any two

channels

CONNECT

SCOPE

Vert.

Amp. thru

10K

to

point

<g>

.

Low

side

to

chassis,

(across

video

det.

load).

ADJUST

Al,

A2

A3, A4,

A5, A6

A7,

A8,

A9

and

Mixer

Plate

Coil

REMARKS

Set

sweep

generator

output

to

produce

3

volts

peak

to

peak

on

scope.

Adjust

Al and A2

alternately

for

maximum gain

and

symmetry

with

the 45.

75MC

positioned

as

shown

in

Fig.

1

.

The

39.

75MC

marker

can

fall

within

± .

SMC

of the

specified

frequency.

if

the

desired

response

cannot

be

obtained,

check

to see

that

the

cores

are

entering

their

respective

windings

from

opposite

ends

of the

coils.

Connect

a

clip

lead

from point

<£>

to

chassis.

Connect

a

clip

lead

from

point

<§>

to

point

<E>

. Use

high

scope

gain

and

adjust

A3

thru

A6 for

MINIMUM

marker

amplitudes

as in

Fig.

2. A3

controls

39.

75MC

marker,

A4

controls

41.

25MC

marker

and A5 and A6

controls

47.

25MC

marker.

Disconnect clip

lead

from point

<£)

and

connect

to

chassis.

Adjust

for

maximum

gain

and

symmetry

of

response

similar

to

Fig.

3

with

markers

as

shown.

A7

affects

low

side

of

curve

and A8

affects

high

side.

SOUND

IF

ALIGNMENT

Connect

an

adjustable attenuator between

the

antenna

and the

receiver

terminals.

Tune

in a

modulated

TV

signal

and

adjust

the

attenuator

until

the

signal

is

below

the

limiting

level

of the

6BN6

(V6)

as

evidenced

by a

hiss

similar

to

super-regeneration

in the

sound.

Adjust

A10,

All,

A12

and

A13

for

maximum sound

and

best

quality. Adjust

the

buzz control

(Rll)

for

MINIMUM

buzz.

If the

hiss

disappears

during sound

alignment,

further reduce

the

signal until

the

hiss

returns.

F

IG.I

FIG.

2

FIG.

3

MIXER

PLATE

COIL

Nl

*S*

PAGE

4

RF

TUNER-TOP

VIEW

MIXER

PLATE

CO

IL

IF

OUTPUT

RFAGC

*

MEASURED

FROM

3 OF

V201.

CHANNEL SELECTOR SWITCH SHOWN

IN

CHANNEL

13

POSITION

VHP

TUNER

PAR!

IS-41682

A

PHOTOFACT STANDARD

NOTATION

SCHEMATIC

How,,d

VC.

S.m,

&

Co.,

Inc. 1958

TUNER

SCHEMATIC

(DLCtfZl

'n 'D

'OZWZl

'MD)

U

'38OOEW

'«

'H

'39OOEW

'M

'IfrOOEV

'a

'H

'31OOCV

"S

'aoooEV

'na

'a

'ni

'3E/9tv

'na

'a

'03

'scatcw

'na

'a

'ns

'3isicw

'na

'a

'nw

'wosctw

'na

'a

'ns

'ssfrctv

'nx

'A

'na

'a

'OH

'H

'03

'SEECCW

'HA

'A

'nr

'rictzw

sisaow

TUNER

ALIGNMENT

INSTRUCTIONS

PHE-ALIGNMENT

INSTRUCTIONS

USE

AN

ISOLATION TRANSFORMER

TO

PROTECT

THE

TEST

EQUIPMENT.

Allow

a 20

minute

warm-up

period

for the

receiver

and

test

equipment.

VHF

OSCILLATOR ALIGNMENT

FOR

TUNERS

#3-41682

AND

S-41683

Set the

fine

tuning

to the

center

of its

range

by

turning

fine

tuning shaft

until

the

small

index

hole

in the

drive

cam is

directly

over

the

small

hole

just

below

the

channel

13

oscillator

adjustment

screw.

Starting

with

the

highest channel

operating

in the

area,

adjust

the

appropriate

oscillator,

adjustment

screw

for

best

picture

and

sound

for

each channel

available.

VHF

RF AND

MIXER ALIGNMENT

FOR

TUNERS

#S-41682

AND

S-41683

Connect

the

negative

lead

of a 2

volt

bias

supply

to

point

\£>

,

Positive

to

chassis.

Connect

the

synchronized sweep

voltage

from

the

sweep

generator

to the

horizontal

input

of the

oscilloscope

for

horizontal

deflection.

The

sweep

generator

output lead should

be

terminated

with

its

characteristic

impedance,

usually

50

ohms.

Use

only

enough

sweep

generator

output

to

provide

a

usable

pattern

on

scope.

Use

10MC

sweep

unless

otherwise noted.

Coils

not

containing adjustable

cores

are

adjusted

by

expanding

or

compressing

coil

turns.

DUMMY

ANTENNA

Matching

Network

"

-

"

-

SWEEP

GENERATOR

COUPLING

Across

antenna

termi-

nals

.

"

SWEEP

GENERATOR

FREQUENCY

213MC

207MC

201MC

195MC

18SMC

I83MC

177MC

85MC

79MC

69MC

63

MC

57MC

MARKER

GENERATOR

FREQUENCY

211.

25MC

215.75MC

205.25MC

209. 75MC

199.25MC

203.75MC

193.25MC

197. 75MC

187. 25MC

191. 75MC

181.25MC

185.75MC

175.25MC

179.

75MC

83.25MC

87.

75MC

77.25MC

81.

75 MC

67.25MC

71.

75MC

61.25MC

65.

75MC

55.25MC

59.

75MC

CHANNEL

13

12

11

10

9

8

7

6

5

4

3

2

CONNECT

SCOPE

Vert.

Amp.

thru

10K

to

point

<§>

.

Low

side

to

chassis.

"

ADJUST

A201

A202

A203

A204

A205

A206

A207

A208,

A209

A210,

A211

A212,

A213

A214,

A215

A216,

A217

REMARKS

Adjust

for

maximum

gain

and

symmetry

of

response

similar

to

Fig.

201

with

markers

as

shown.

"

Adjust

for

maximum

gain

and

symmetry

of

response

similar

to

Fig,

201

with

markers

as

shown. Adjust first

coil

for

proper

marker

position

and

second

coil

for

maxi-

mum

gain

and

symmetry.

"

F

IG.

201

Rl

Rcvr.

150n

FIG.202

FIG.

203

PAGE

6

TUNER

ALIGNMENT

INSTRUCTIONS

(cont)

UHF

ALIGNMENT

Alignment

of the UHF

tuner should

not be

artemped

unless

proper

test

equipment

is

available.

Switch

the

receiver

to the UHF

position.

Connect

2

volts

bias

to the IF AGC

line

and

adjust

the

sweep

generator

output

to

provide

3

volts

peak

to

peak

on the

scope

in the

following

steps.

Connect

the

synchronized

sweep voltage

from

the

sweep generator

to the

horizontal

input

of the

oscilloscope

for

horizontal deflection.

Use

10MC sweep

unless

otherwise noted.

DUMMY

ANTENNA

Fig.

203

SWEEP

GENERATOR

COUPLING

Across

UHF

antenna

terminals

thru

match-

ing

network

(Fig. 203).

SWEEP

GENERATOR

FREQUENCY

713MC

473MC

887MC

MARKER

GENERATOR

FREQUENCY

711.

25MC

471.

25MC

885.25MC

CHANNEL

54

14

83

CONNECT

SCOPE

Vert.

Amp.

thru

10K

across

video

detector

load.

ADJUST

A218,

A219,

A220

A221,

A222,

A223

REMARKS

Tuner

rocker

arm

should

be in a

horizontal

position.

If

necessary,

loosen

the set

screw

and

adjust

the

tuner

so

that

rocker

arm is

horizontal

when

the

channel

selector

is

set at

channel

54. Do not

adjust

A218

unless

oscillator

calibration

is off

more than

3

channels.

If

necessary,

adjust

A218

to

place

video

marker

at 50% on

response

curve

as in

Fig. 202.

The

image (weaker

response)

will

appear

also.

The

response

toward

the

counter clockwise position

of

A218

is the

proper

response.

Adjust

A219

and

A220 for maximum amplitude of re-

sponse

similar

to

Fig. 202.

Check

for

response

similar

to

Fig. 202.

If

the

oscillator

is off

more

than

3

channels,

adjust

the

oscillator

travel

(oscillator,

mixer

and

antenna

travel

adjustments

are

the

3

round

screws

on top of the UHF

tuner)

adjustment

to

scale.

Care

must

be

used

in

making

this

adjustment

so as not to

move

the

rocker

arm out of its

bearing.

Set the

mixer

and

antenna

travel

adjustments

for

maximum

response

on

scope.

Adjust

A221

to

place

marker

at 50% as in

Fig. 202. Adjust

A222

and

A223

for

maxi-

mum

gain

and

symmetry

similar

to

Fig.

202.

>

10

o 2 o

TUNER

PARTS

LIST

AND

DESCRIPTIONS

TUBES

(GENERAL

ELECTRIC,

SYLVANIA)

ITEM

No.

V201

USE

RF

Amp.

TYPE

6BK7A

NOTES

ITEM

No.

V202

USE

Mixer

-Osc.

TYPE

6U8

NOTES

FIXED

CAPACITORS

Capacity

values

given

in the

rating

column

are in

mfd.

for

Paper

Capacitors,

and in

mmfd.

for

Mica

and

Ceramic

Capacitors.

ITEM

No.

C201

C202

C203

C204

C205

C206

C207

C208

C209

C210

C211

C212

C213

C214

C215

C216

C217

RATING

CAP.

12

18

12

3.3

8.2

1.8

1000

25

1000

1.0

5

1000

VOLT

1000

REPLACEMENT

DATA

ZENITH

PART

No.

22-2679

22-2680

22-2679

22-2343

22-2681

22-2428

22-2889

22-2671

22-2889

22-2720

22-2714

22-2716

22-2889

AEROVOX

PART

No.

SI 12

NPO-SI

3

.

:

NPO-SI8.2

EF-001

N750-SI2.5

EF-001

NPO-SI1.0

EF-001

CENTRALAB

PART

No.

D6-120

TCZ-3R3

MFT-1000

TCN-25

MFT-1000

TCZ-1

MFT-1000

CORNELL-

DUBILIER

PART

No.

LT6Q12

C10V33C

C10V82C

C10Q25U

ERIE

PART

No.

GP-12

TCO-3.3

TCO-8.2

TC7-25

TCO-1

MALLORY

PART

No.

UC-5412

ZT-5533

SPRAGUE

PART

No.

5GA-Q12

5TCCB-V33

503C-D1

5TCU-Q25

503C-D1

5TCCB-V1

503C-D1

NOTES

5%

NPO 5%

N750

10%

N1500

10%

N330

5%

N330

5%

m

-<

BB

*"

*

U

m X

o c

-

o

_

z

CO

»

C

RESISTORS

All

wattages

1/2

watt,

or

less,

unless

otherwise

listed.

SS-"

ITEM

No.

R201

R202

R203

R204

R205

R206

R207

RATING

OHMS

230K

22K

2.

2meg

120K

100

K

1200S2

WATT

ZENITH

PART

No.

NOTES

ITEM

No.

R208

R209

R210

R211

R212

R213

RATING

OHMS

100K

10K

4700S2

470J2

WATT

2

ZENITH

PART

No.

63-317»

63-2398

NOTES

COILS

(RF-IF)

ITEM

No

L201

L202

L203

L204

L205

USE

IF

Trap Coil

IF

Trap

Coil

Ant.

Trans.

Ant.

Coils

Neut.

Coil

ZENITH

PART

No.

20-567

S-24644

S-23641

20-633

NOTES

Alt.

part

#24645

Channel

2-13

Wafer

Assy.

ITEM

No.

L206

L207

L208

L209

USE

HF

Coils

Mixer Screen

Coil

Osc.

Coils

Mixer

Plate

Coil

ZENITH

PART

No.

S-23640

20-632

S-41807

S-41665

NOTES

Channel

2-13

Wafer

Assy.

Channel

2-13

Wafer

Assy.

1

73

PAGE

19

TUNER-LEFT SIDE

TUNER-RIGHT

SIDE

PAGE

2O

MIXER

A

6U8

MIXER

PLATE

COIL

N1500

I.lmmf

CHANNEL

SELECTOR

SWITCH SHOWN

IN

CHANNEL

13

POSITION

A

PHOTOFACT

STANDARD

NOTATION

SCHEMATIC

How.rJW.

S.m,aCo.,lne.

1958

ALTERNATE

UHF-VHF TUNER SCHEMATIC

(DIEtf/L

'0

'O

'OtV/l

'H3)

a

'38OOEV

'a

'H

'39OOEV

'M

'3frOOCV

'«

'H

'31OOEW

'M

'3OOOCV

'na

'a

'ns

'3C/9cw

'na

'a

'ni

'IEBZCV

'na

'a

'n3

'aisccv

'na

'a

'nw

'woszcv

'na

'a

'ns

'isfrttw

'nA

'A

'na

'a

'nn

'H

'na

'aeczcv

'nA

'A

'nr

Tictcv

siiaow

ALTERNATE

TUNER

ALIGNMENT INSTRUCTIONS

PRE-ALIGNMENT

INSTRUCTIONS

USE

AN

ISOLATION TRANSFORMER

TO

PROTECT

THE

TEST EQUIPMENT.

Allow

a 20

minute

warm-up period

for the

receiver

and

test

equipment.

VHF

OSCILLATOR

ALIGNMENT

FOR

TUNERS

#3-41692

AND

S-41693

Set

the

fine

tuning

at the

center

of its

range.

The

adjustments

are

accessible,

one at a

time,

as the

channel

selector

is

rotated.

Adjust

for

best

picture

and

sound.

___

VHF

RF AND

MIXER

ALIGNMENT

FOR

TUNERS

#3-41692

AND

S-41693

Connect

negative

lead

of

0-15 volt

variable

bias

supply

to

point

^>

.

Positive

to

chassis.

Adjust

bias

for 2. 5

volts

at

point

<£>

.

Connect

the

synchronized sweep voltage from

the

sweep generator

to the

horizontal input

of the

oscilloscope

for

horizontal deflection.

Use

only

enough

sweep generator output

to

provide

a

usable

pattern

on

scope.

Use

10MC sweep

unless

otherwise

noted.

DUMMY

ANTENNA

Fig.

203

SWEEP

GENERATOR

COUPLING

Across antenna

termi-

nals matching network

(Fig. 203).

SWEEP

GENERATOR

FREQUENCY

195MC

213MC

207MC

201MC

195MC

189MC

183MC

177MC

85MC

79MC

69MC

63MC

57MC

MARKER

GENERATOR

FREQUENCY

193.25MC

197.75MC

211.25MC

21S.75MC

205.

25 MC

209. 75MC

199.

25MC

203.

75MC

193.25MC

197.

75MC

187.

25MC

191.

75MC

181. 25MC

185.75MC

175.25MC

179.

75MC

83.25MC

87.

75MC

77.

25MC

81.

75MC

67.25MC

71.

75MC

61.

25MC

65.75MC

55.25MC

59.

75MC

CHANNEL

10

13

12

11

10

9

8

7

6

5

4

3

2

CONNECT

SCOPE

Vert.

Amp. thru

10K

to

point

<g>

.

Low

side

to

chassis.

ADJUST

A201,

A202,

A203

A204

A205

A206

A207

A208

A209

A210

A211

A212

A213

A214

A215

REMARKS

Adjust

A201

and

A202

for

maximum

ampli-

tude

and

symmetry

with

markers

as

shown

in

Fig. 201.

Increase

bias

for

MINIMUM

amplitude

of

response

curve. Without

changing

the

bias

adjust A203

to

obtain

MINIMUM

response

on the

scope.

Adjust

for

maximum amplitude

of

response

similar

to

Fig. 201. Adjust

by

expanding

or

compressing

coil

turns.

UHF

ALIGNMENT

Alignment

of the UHF

tuner should

not be

attempted unless proper

test

equipment

is

available.

Switch

the

receiver

to the UHF

position.

Connect

2

volts

bias

to the IF AGC

line

and

adjust

the

sweep

generator

output

to

provide

3

volts

peak

to

peak

on the

scope

in the

following

steps.

Connect

the

synchronized sweep voltage from

the

sweep

generator

to the

horizontal

input

of the

oscilloscope

for

horizontal deflection.

Use

10MC

sweep

unless otherwise noted.

DUMMY

ANTENNA

Fig:

203

'

SWEEP

GENERATOR

COUPLING

Across

UHF

antenna

terminals thru match-

ing

network (Fig. 203).

SWEEP

GENERATOR

FREQUENCY

713MC

473MC

887MC

MARKER

GENERATOR

FREQUENCY

711.25MC

471.25MC

885.25MC

CHANNEL

54

14

83

CONNECT

SCOPE

Vert.

Amp.

thru

10K

across

video

detector

load.

ADJUST

A216,

A217,

A218

A219,

A220,

A221

REMARKS

Tuner

rocker

arm

should

be in a

horizontal

position.

If

necessary,

loosen

the set

screw

and

adjust

the

tuner

so

that

rocker

arm

Is

horizontal

when

the

channel

selector

is set at

channel

54. Do not

adjust

A216

unless

oscil-

lator

calibration

is

off

more

than

3

channels.

If

necessary,

adjust

A216

to

place video

marker

at 50% on

response

curve

as in

Fig.

202.

The

image (weaker response)

will

appear

also.

The

response

toward

the

coun-

ter

clockwise position

of

A216

is the

proper

response.

Adjust

A217

and

A218

for

maxi-

mum

amplitude

of

response

similar

to

Fig.

202.

Check

for

response

similar

to

Fig. 202.

If

the

oscillator

is off

more

than

3

channels,

adjust

the

oscillator

travel

(oscillator,

mixer

and

antenna

travel

adjustments

are

tne

3

round

screws

on top of the UHF

tuner)

adjustment

to

scale.

Care

must

be

used

in

making

this

adjustment

so as not to

move

the

rocker

arm out of its

bearing.

Set the

mixer

and

antenna

travel

adjustments

for

maximum

response

on

scope.

Adjust

A219

to

place

marker

at 50% as in

Fig. 202.

Adjust

A220

and

A221

for

maxi-

mum

gain

and

symmetry

similar

to

Fig.

202.

F

IG.20I

FIG.202

Rl

Rcvr.

150n

FIG.

203

PAGE

8

MIXER

A

6CG8

IF

OUTPUT

VHFANT.

TERMINAL

BOARD

FILAMENT

A

PHOTOFACT

STANDARD

NOTATION

SCHEMATIC

Howird

W.

Sim,

&

Co.,

Inc.

1958

ALTERNATE

UHF-VHF TUNER SCHEMATIC

(oizwzi

'n

'o

'ocv/i

-HD)

a

'aeoocv

'a

'H

'39ooev

'a

'a»oocw

'a

'H

'aioocv

'a

'3OOOEV

'na

'a

'n3

'3CZ9ZW

'na

'a

'na

'ataczv

'na

'a

'n3

'3isczv

'na

'a

'nw

'wosctw

'na

'a

'na

'as^ccv

'nx

'A

'na

'a

'nH

'H

'na

'sezctv

'nx

'A

'nr

'rittcv

siaaow

HIINSZ

•a

O

m

00

VHFANT.

TERMINAL

BOARD

£*•

W-

30mmf

.

—

,

»-/7OTT>>

—

t

—

=

—

!

JT

^ML>

'Wi

(mj

}

'

120m

mf

\\/s-

fl

<^

RF

AMP

i

,

i

1

6BN4

A,\\

>

«KER

[A204]THRu[A215j

.

I'"

Wv",/

A

6CG8

r

!

5

1.0-4.5

I

Y

13

72V

mmf

=^

°

R

J25V

i

AV

XTN

|A20l|^

§

X^i

,ici/

)(•

«.<:>

^W>

<p^—

r

'--^---^

—

•

—

-*

^

"

-2-7V

/r==--^y_

12mmf

!

i

„

i

/\

A

iM

A

/

V

A

:28mmf

"

V*

i\

>

o

1

J

•

A

PHOTOFACT STANDARD

1

\

1-6

Ps

5.0-10J7

mmf

~

if

,

Hi

1

'

|A203|

>

J

4700n

*—*

SOOmmf

y

4

47mmf

*"T*"

_-J—

|

SOOmmf

<

—

it

T

9\F^!

^

47mmf

!

gfr^

b

J[A202J

|3900n

JT

1

T1-0-4/5

30m;.

^

"

6»

mmf

—

o/ll\_

i

\

|

220K

fc

1

F

MIXER

1

PLATE

COIL

V

g

^>

IF

OUTPUT

<

10K

>

^

osc

S

B6CG8

^lOOOmmf

FINE

TUNING

4r

!'J5~^*

^^

1

l§

±2^

T

2|WV

1

o

N750

N330

r'TN

6.8mmf

f^Ax

-L

3.ommf

^"

_L

5

I

NPO

'

10000

1

UK

=•

SOOmmf

>

6800n

r

SOOmmf

J

S5600n7W

]

1

VHF

TUNER

PART

IS-41692

NOTATION

SCHEMATIC

Howard

W.

Sams

& C

o.,

Inc. 1958

ALTERNATE

VHP

TUNER

SCHEMATIC

1

i

*

»|

FILAMENT

If?

9

l?l

T"

T

275V,,

H)

X

,

T

RFAGC

~

'AGE

16

CHASSIS

BOTTOM VIEW-CAPACITOR

AND

ALIGNMENT

IDENTIFICATION

tr

aacnod

(OLttf/L

'0

'D

'OCWZl

'MD)

a

'38OOEW

'a

'H

'39OOCV

'a

'3frOOeV

'«

'H

'3LOOCV

'a

'3OOOCV

'na

'a

'n3

'3e/9cv

'na

'a

'03

'izvtiv

'na

'a

'ns

aisitv

'na

'a

'nw

'wosctv

'na

'a

'n3

'3s*ctw

'iu

'A

'na

'a

'OH

'H

'03

'3ect5W

'nx

'A

'nr

Tictcv

siaaow

'AGE

1O

CHASSIS

BOTTOM

VIEW-RESISTOR

AND

INDUCTOR

IDENTIFICATION

aacnod

(DltW/L

'0

'O

'OCV/l

'MS)

Ji

'380OCV

'a

'H

'39OOCV

'a

'3frOOCV

'H

'310OCV

'a

'3OOOCV

'fia

'a

'03

'3C^9cw

'na

'a

'ns

'3S8C5V

'na

'a

'na

'aisccv

'na

'a

'nw

'wosccv

'na

'a

'03

'ssfricw

'ru

'*

'na

'a

'nn

'H

'ns

'acctcw

'nx

'A

'nr

Tizccw

si3aow

CENTERING

WIDTH

SLEEVE

BUZZ

FRINGE

LOCK

>i

u

5

o-

5

03

o

».C

O

in

«_

•H

m

-<

•5

"

5

»

c

CABINET-REAR

VIEW

'

O-

^

"^

^

> m

-<

•0s

C

O

™

-

•

C >

HORIZONTAL

SWEEP CIRCUIT ADJUSTMENTS

O

jo

me

Turn

the set on and

tune

in a TV

station, preferably

with

a

test

pattern.

Set

the

brightness

and

contrast controls

for a

normal picture.

Turn

the

horizontal hold clockwise

until

the

picture

loses

sync.

It may

be

necessary

to

switch

otf

channel

and

back again

for

picture

to

lose

sync.

Turn

the

horizontal hold slowly counter clockwise until

the

picture just

falls

into

sync.

5

SET

393

FOLDER

4

PAGE

11

PARTS

LIST

A

TUBES

(GENERAL

ELECTRIC,

SYLVANIA)

ITEM

No.

VI

V2

V3

V4

V5

V6

V7

USE

1st. Video

IF

Amp.

2nd.

Video

IF

Amp.

3rd. Video

IF

Amp.

Video

Output-Sound

IF Amp

AGC

-

Sync

Sep.

-

Noise

Limiter

Audio

Det.

Audio Output

TYPE

6BZ6

6AW8A

6BU8

6BN6

6AQ5

NOTES

«

Used

in

Ch.

17A21Q.

PICTURE

TUBE

ELECTROLYTIC

CAPACITORS

FIXED

CAPACITORS

Capacity

values

given

in the

rating

column

are in

mfd.

for

Paper

Capacitors,

and in

mmfd.

for

Mica

and

Ceramic

Capacitors.

)

Some

versions

use 7.

5mmf

(Part

#22-2742)

In

this

application.

D

Some

versions

use .

Olmfd

gi

200V

10%

(Part

#22-2565)

in

this

application.

ITEM

No.

V8

V9

V10

VU

V12

V13

V14

USE

Vert.

Mult.

-Vert.

Output

Horiz.

Phase

Det.

-

Horiz.

AFC

Horiz.

Osc.-Horlz.

Disch.

Horiz.

Output

Damper

HV

Rectifier

LV

Rectifier

TYPE

6CY7

6CN7

6CG7

6BQ6A

6AX4GT

1B3GT

5U4GA

NOTES

1J3GT

*

5DB4»

5AU4

>

ITEM

No.

V15

REPIACEMENT

DATA

ZENITH

PART

No.

21CXP4

24AJP4

GENERAL

ELECTRIC

PART

No.

RCA

PART

No.

SYLVANPA

PART

No.

21CXP4

(D

NOTES

CD

"Silver

Screen

85"

ITEM

No.

CIA

B

C

D

C2A

B

C

RATING

CAP.

•40

.80

.10

100

14

•10

20

VOLT.

400

476

50

350

400

25

REPLACEMENT

DATA

ZENITH

PART

No.

22-2971

22-2744

AEROVOX

PART

No.

AFH4-113-50

,

AFH3-180

CORNELL-

DUBILIER

PART

No.

C1445.3

-BR8045

C1445

MALLORY

PART

No.

rFP459

LTCSO

JP394

hrc22

PYRAMID

PART

No.

SANGAMO

PART

No.

,Q-046

4HTD-4520

T-610

SPRAGUE

PART

No.

*R2584

TVL-3806.

6

ITEM

No.

R1A

B

C

R2A

B

R3A

B

R4A

,

B

IR5A

B

R6A

B

R7A

B

R8A

B

R9A

B

RIGA

B

Rll

RATING

RESIST-

ANCE

Imeg

Shall

Switch

Imeg

Shaft

750K

Shaft

250K

Shaft

8000!!

Shaft

7.

5meg

Shaft

750K

Shaft

7.5meg

Shaft

aooon

Shaft

5meg

Shaft

750O

WATTS

i

1

a

~z

2{WW)

1

i

4

2

2(WW)

REPLACEMEI

ZENITH

PART

No.

63-4005

63-3616

63-3299

63-3572

83-4001,

63-2919

63-3262

63-3263

63-3568

63-4012

63-3284

CENTRALAB

PART

No.

B-70

Not

Req..

KB-1

*

B-70

Not

Req.

B-66

Not

Req.

B-50

Not

Req.

WW-752

t

Not

Req.

AB-B'J

AK-1

AB-66

AK-1

AB-89

tt

AK-1

AB-8

AK-1

CLARO

PART

A47-lm

FS-3

SWE-12

A47-lm

KSS-3

A47-75'

KSS-3

A47-25I

KSS-3

A43-75I

DFS-i/

A47-7.

!

FKS-1/

A47-75I

FKS-1/'

A47-7.

!

FKS-1/

A47-30I

FKS-1/'

39-800

Note

1.

Alternate

3meg

control

(part

#63-4026)

may be

used

in

* Use

KR-1

on red

label

control.

t

File

double

flat as

required.

tt

Use

Imeg

resistor

In

series

with

right

hand

terminal

of

com

RESIS

All

wattages

1/2

watt,

or

les:

ITEM

No.

C3

C4

C5

C6

C7

C8

C9

do

Cll

C12

as

C14

CIS

C16

07

as

C19

C20

C21

C22

C23

C24

C25

C26

C27

C26

C29

C30

C31

C32

C33A

B

C34

C35

C36

C37

C38

C39

C40

C41

C42

C43

C44

C45

C46

C47A

B

C48

C49

C50

C51

C52

C53

C54

C55

C56

C57A

B

C58

C59

C60

C61

C62

RATING

CAP.

470

6

1000

12

7

470

1.5

1000

470

330

470

5

7.5

4700

47

.1

10000

1000

10000

.33

3.3

50

2.4

470

4

10

1000'

1000-

470

10000

2200

470

3300

.15

.022

.0068

.015

.1

.047

.033

100

-

100 _

4700

1000

.047

.1

330

1100

1500

1000

1000"

1000.

4700

.1

10000

110

72

VOLT

1000

200

1000

200

1000

\

iOOO

1000

200

400

600

400

200

400

\

200

1000

\0

4000

2000

REPLACEMENT

DATA

ZENITH

PART

No.

22-6

22-2381

22-17

22-2379

22-2513

22-16

22-1764

22-17

22-16

22-2667

22-16

22-2990

22-2742

22-14

22-2467

22-1777

22-3

22-17

22-3

22-2159

22-2343

22-2460

22-2596

22-2460

22-2731

22-21

22-6

22-3

22-8

22-6

22-11

22-2147

22-2621

22-2264

22-2061

22-1778

22-2635

22-22

/

\4

22-14

22-17

22-1778

22-1777

22-2667

22-2859

22-12

22-17

22-21

22-14

22-1841

22-3

22-2694

AEROVOX

PART

No.

HVD-15-470

NPO-SI1.5

1469-00033

P288N-1

BPD-01

HVD-15-1000

BPD-01

P288N-33

NPO-SI3.3

SI 50

HVD-15-470

BPD-01

BPD-0022

HVD-15-470

BPD-0033

P288N-15

P488N-1

P288N-047

BPD-0001

P288N-1

1469-08033

1464-0011

P688N-1

BPD-01

CENTRALAB

PART

No.

DD-471

D6-471

TCZ-1R5

D6-471

D6-331

D6-471

TCN-47

DF-104

DD-103

DD-102

DD-103

TCZ-3R3

D6-500

/

\1

DD-103

DD-222

D6-471

DD-332

DF-104

DF-503

DD-101

DF-104

D6-331

1

\4

DD-103

CORNELL-

DUBILIER

PART

No.

BYA10T47

C10V6C

OOV7C

5R5T47

C10V15C

5R5T47

5R5T33

5R5T47

1R5D47

CUB2P1

CTB2P1

BYA6S1

BYA10D1M

BYA6S1

CUB2P33

C10V33C

LT6Q5

C10V4C

"1R5D1

-LR5D1

BYA10T47

BYA6S1

BYA10D22

BYA10T47

BYA10D33

CUB2P15

CUB4P1

CUB2S47

L10T1

1R5D47

1H5D47

1R5D1

CUB2P1

5H5T33

1H5D11

1R5D15

"1R5D1

-1R5D1

1R5D47

CUB6P1

BYA6S1

ERIE

PART

No.

HD15-470

ED-470

TCO-1.5

ED-470

ED-330

ED-470

TC7-47

ED-01

HD15-100(

ED-01

TCO-3.3

GP-50

ED-1000

HD15-470

ED-01

ED-0022

HD15-470

ED-0033

ED-100

ED-1000

ED-330

CY20C112J

ED-1500

ED-1000

ED-01

MALLORY

PART

No.

DC30347

GEM-201

DC511

DC3021

DC5U

GEM-2033

ZT-5533

UC-545

MCB255

DC30347

DC511

UC-5222

DC30347

UC-5233

GEM-2015

GEM-16268

GEM-401

GEM-4147

UC-531

MCB255

GEM-201

MCB255

GEM-601

DC511

SPRAGUE

PART

No.

5GA-T47

MS-347

5TCCB-W

MS-347

MS-333

MS-347

MS-247

2TM-P1

5HK-S1

5GA-D1

5HK-S1

2TM-P33

5TCCB-V3!

5GA-Q5

5GA-D1

5GA-T47

5HK-S1

5GA-D22

5GA-T47

5GA-D33

2TM-P15

4TM-P1

2TM-S47

5GA-T1

MS-247

MS-21

2TM-P1

MS-333

MS-211

MS-215

MS-21

MS-247

6TM-P1

5HK-S1

NOTES

NPO

10%

N76 5%

N75 5%

NPO

10%

N470

10%

N750

5%

10%

NPO©

N150

5%

10%

®

10%

a

10%

ITEM

No.

R12

R13

,R14

R15

R16

R17

R18

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R29

R30

R31

R32

R33

R34

R35

R36

R37

R38

R39

R40

R41

R42

R43

R44

R45

R46

R47

R48

R49

R50

R51

R52

R53

RATING

OHMS

2.

2meg

33K

sen

15K

56(2

isoon

120K

15 K

22R

220!)

220!!

8200n

1200

2700S2

68K

osoon

10K

12K

100 K

looon

100K

15K

220K

3301!

33 K

47SJ

150K

220K

27K

56K5%

180K

Imeg

l.Smeg

680K

470K

100K

180 K

27K

47K

100K

WATT

4

1

2

ZENITH

PART

No.

63-1926

63-4008

63-1737

63-1733

63-1792

63-1873

63-2372

63-1715

63-1758

63-3602

63-1747

63-1803

63-1862

63-1820

63-1071

63-1831

63-1870

63-1786

63-1869

63-1834

63-1883

63-1765

63-957

63-1729

63-1876

63-1884

63-1845

63-1858

63-1880

63-1911

63-1918

63-1904

63-1898

63-1869

63-1880

63-947

63-1855

63-1870

NOTES

Note

1.

Chassis

17A21Q

uses

33

TRANSFORME

ITEM

No.

Tl

RATING

PRI.

117V

@1.6A

SEC.

1

560VCT

®

.

280A

SEC.

2

ZENITH

PART

No.

95-1555

0>

95-1562

@

Holldorso

PART

No

I

Used

in Ch.

17A20,

U,

Q.

)

Used

in Ch.

17A21Q.

TRANSFORMERS

ITEM

No.

T2

T3A

B

M5

T4

USE

Vert.

Output

Yoke-Horiz.

(13MH)

(90°)

Vert.

(37.

5MH)

Rear

Cover

&

Centering

Device

Horiz.

Oulput

!

ZENITH

PART

No.

95-1552

95-1554

@

S-23237

S-41906

PART

No.

DF606

®a>

Mer

PART

MDF-

®<3>

HVO-

d)

Connect

as

autoformer.

@

Includes

rear

cover

and

centering

device.

®

Connect yoke

terminal

#3 to

horizontal

output

transformer

i

terminal

#1. Use

original

yoke damping network,

if

necessary

<3)

Use

original

rear

cover

and

centering

device.

®

Connect yoke

terminal

#2 to

horizontal

output

transformer

i

terminal

#1. Cut and

tape

orange

lead.

® Use

original

mounting

bracket.

PAGE

12

JiA)

PARTS

LIST

AND

DESCRIPTIONS

CONTROLS

)utput

Disch.

TYPE

6CT7

6CN7

6CG7

6BQ6A

6AX4GT

1B3GT

5U4GA

NOTES

1J3GT

*

5DB4

«

5AU4«

MID

No.

SANGAMO

PART

No.

rQ-046

4UTD-4520

T-610

SPRAGUE

PART

No.

•R2584

TVL-3806.

6

ITEM

No.

H1A

B

C

R2A

B

R3A

B

R4A

,

B

IR5A

B

R6A

B

R7A

B

R8A

B

R9A

B

R10A

B

Rll

RATING

RESIST-

ANCE

Imeg

Shaft

Switch

Imeg

Shaft

750K

Shaft

250

K

Shaft

8000(2

Shaft

7.

5meg

Shaft

750 K

Shaft

7.

Smeg

Shaft

3000(2

Shaft

Smeg

Shaft

750(2

WATTS

a

1

a

2(WW)

i

1

~z

2(WW)

REPLACEMENT

DATA

PART

No.

63-4005

63-3616

63-3299

63-3572

63-4001

».

63-2919

63-3262

63-3263

93-3588

63-4012

63-3284

CENTRALAB

PART

No.

B-70

Not

Req.

KB-1

»

B-70

Not

Req.

B-66

Not

Req.

B-50

Not

Req.

WW-752

f

Not

Heq.

AB-89

AK-1

AB-66

AK-1

AB-89

tt

AK-1

AB-8

AK-1

CLAROSTAT

PART

No.

A47-lmeg-Z

FS-3

SWE-12

A47-lmeg-Z

KSS-3

A47-750K-S

KSS-3

A47-250K-S

KSS-3

A43-7500

DFS-1/2

A47-7. 5meg

-S

FKS-1/4

A47-750K-S

FKS-1/4

A47-7.

Smeg

-S

FKS-1/4

ft

A47-3000-S

FKS-1/4

39-800

IRC

PART

No.

"013-137

Not

Req.

76-1

013-137

Not

Req.

011-136

Not

Req.

QU-130

Not

Req.

011-142

RQ

QU-136

TQ

QU-142

tt

TQ

011-112

RQ

Bll-141

TMl-Klt

MALLORY

PART

No.

PP16A

Not

Req.

Not

Req.

U53

Not

Req.

054

Not

Req.

U48

Not

Req.

U82

Not

Req.

PTA7S4L

Not

Req.

PTA855R

tt

Not

Req.

PTA352L

Not

Req.

FL-750

INSTALLATION

NOTES

Volume

Tone

Vert.

Hold

Brightness

Contrast

Focus

-Note

1

AGC

Vert.

Size

with

Imeg

stop

Vert.

Lin.

Fringe

Lock

Buzz

Note

1.

Alternate

3meg

control

(part

#63-4026)

may be

used

in

some

versions.

* Use

KR-1

on red

label

control.

t

File

double flat

as

required.

tt

Use

Imeg

resistor

in

series

with

right

hand

terminal

of

control.

ORIGINAL

TERMINAL

CONNECTIONS

Tl

ITEM

No.

T5

IMPEDANCE

PRI.

940012

SEC.

3-4S2

ZENITH

PART

No.

95-1379

(J>

1.

for

Paper

apacitors.

VTA

ULLORY

ART

No.

230347

iM-201

5M-201

3511

33021

3511

JM-2033

F-5533

3-545

CB255

330347

3511

3-5222

330347

3-5233

EM-2015

EM-16268

EM-401

EM-4147

0-531

C-531

CB255

EM-201

CB255

EM-601

C511

SPRAGUE

PART

No.

5GA-T47

MS-347

5TCCB-W

MS-347

MS-333

MS-347

MS-247

2TM-P1

5HK-S1

5GA-D1

5HK-S1

2TM-P33

5TCCB-V3!

5GA-Q5

5GA-D1

5GA-T47

5HK-S1

5GA-D22

5GA-T47

5GA-D33

2TM-P15

4TM-P1

2TM-S47

5GA-T1

MS-247

MS-21

2TM-P1

MS-333

MS-211

MS

-215

MS-21

MS-247

6TM-P1

5HK-S1

NOTES

NPO

10%

N75 5%

N75

5%

NPO

10%

N470

10%

N750

5%

10%

NPOO)

N150

5%

10%

®

10%

ITEM

No.

R12

R13

,R14

R15

R16

R17

R18

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R29

R30

R31

H32

R33

R34

R35

R36

R37

R38

R39

R40

H41

R42

R43

R44

R45

R46

R47

R48

R49

H50

R51

R52

R53

RATING

OHMS

2.

2meg

33 K

68(2

15K

561!

1500(2

120K

15K

220

220(2

22012

8200(2

120(2

2700(2

68K

6

800B

10K

12K

100K

1000(2

100K

1SK

220 K

330Q

33K

47(2

150K

220K

27K

56K5%

180K

Imeg

1.

Smeg

680K

470K

100K

180K

27K

47K

100K

WATT

4

1

2

ZENITH

PART

No.

63-1926

63-4008

83-1737

63-1733

63-1782

63-1873

63-2372

63-1715

63-1758

63-3902

63-1747

63-1803

63-1862

93-1820

63-1071

63-1831

63-1870

63-1786

63-1869

63-1834

63-1883

63-1765

93-957

63-1729

63-1876

63-1884

63-1845

63-1858

63-1880

63-1911

63-1918

63-1904

63-1898

63-1889

63-1880

63-947

63-1855

63-1870

NOTES

RESISTORS

Allwattagesl/Zwatt,

or

less,

unless

otherwise

listed.

ITEM

No.

R54

R55

R56

R57

R58

RS9

R60

R61

R62

R63

R64

R65

R66

R67

R68

R69

R70

R71

R72

R73

H74

R75

R76

R77

R78

R79

R80

R81

R82

R83

R84

R85

R88

R87

R88

R89

R90

R91

R92

R93

R94

RATING

OHMS

10K

880B

390K

27K

470(2

680(2

220K

82K

3.

3meg

22K

18K

33K

220 K

68K

82K

1000(2

2.

2meg

82K

1200(2

8200(2

390(2

100K

Imeg

100K

47K

680(2

22K

10K

68K

180K

100(2

Imeg

22K

100(2

10K

56K

4.

7Q

22K

230 K

WATT

2

1

2

1

4

2

1

ZENITH

PART

No.

63-1827

63-1779

63-1894

63-947

63-1771

63-2290

63-1883

63-1866

63-1932

63-1842

63-1838

63-1848

63-1883

63-1862

63-1866

63-1786

63-1925

63-1866

63-1976

63-3602

63-1768

63-1869

63-1911

63-1869

63-1855

63-1779

63-1842

63-2145

63-1862

63-2313

63-1744

63-1912

63-1841

63-1744

63-3623

63-2341

63-1581

63-1055

63-3607

NOTES

Motel

ITEM

No.

SP1

TYPE

SIZE

5

1/4"

10"

8"

3

1/4"

FIELD

PM

Electrt

V.

C.

IMP.

3-4(2

3-412

3-4(2

static

ITEM

No.

L1A

B

L2A

B

L3A

B

L4

LS

L6

L7

L8

L9A

B

L10

m

L12

USE

1st. Video

IF

41.25MCTrap

47.

25MC

Trap

39.

75MC

Trap

2nd.

Video

IF

47.

25MCTrap

3rd. Video

IF

4th.

Video

IF

Series

Peaking Coil

HF

Choke

Shunt

Peaking Coil

4.

SMC

Trap

1st.

Sound

IF

Series

Peaking

Coll

2nd.

Sound

IF

Quadrature Coil

S-

8-

S-

S—

S-!

S-

S-:

S-.

S-l

*

Parallel

with

560012

resistor.

•

Enlarge mounting holes.

Note

1.

Alternate

part

(S-41890.

ITEM

No.

L13

DC

RES.

PRI.

165(2

*

SEC.

ZENITH

PART

No

S-19743

Note

1.

Chassis

17A21Q

uses

330(2

2W

(Part

J63-1622)

in

this

application.

ITEM

No.

L14

RATINGS

CURRENT

(Measured)

.280A

DC

RES.

62(2

INDUCTA

(0

CURR

1000^

1.8

Hy

TRANSFORMER

(POWER)

ITEM

No.

Tl

RATING

PRI.

117V

®1.6A

SEC.

1

560VCT

@

.

280A

SEC.

2

REPLACEMENT

DATA

ZENITH

PART

No.

95-1555

(D

95-1562

@

Holldorson

PART

No.

Merit

PART

No.

PART

No.

PART

No.

Thordorson

PART

No.

Triad

PART

No.

)

Used

in

Ch.

17A20,

U, Q.

)

Used

in Ch.

17A21Q.

3)

Used

in Ch.

17A20,

U,

Q.

©

Used

in Ch.

17A21Q.

®

Drill

new

mounting hole.

TRANSFORMERS (SWEEP CIRCUITS)

ITEM

No.

Kl

K2

USE

Vert.

Integrator

Vert.

Feedback

ITEM

No.

T2

T3A

B

MS

T4

USE

Vert.

Output

Yoke-Horlz.

(13MH)

(90°)

Vert.

(37.

5MH)

Rear

Cover

&

Centering Device

Horiz.

Output

REPLACEMENT DATA

ZENITH

PART

No.

9S-1SS2

95-1554

@

S-23237

S-41906

Holldorson

PART

No.

DF606

®®

Merit

PART

No.

MDF-91

®3>

HVO-143

PART

No.

Y90F12/47

®3>

X137

® *

Sloncor

PART

No.

A-8123

Q)

DY-13A

®a>

HO-271®*

Thordarson

PART

No.

Y-39

®

FLY-118®*

Triad

PART

No.

Y-42-28,

NW24

NOTES

ITEM

No.

Ml

TYPE

N

RATING

4AOA

125V

S/B

Z

P

FUSE

136-33

CJ)

Connect

as

autoformer.

(2)

Includes

rear

cover

and

centering device.

(£>

Connect yoke terminal

#3 to

horizontal output transformer terminal

#2,

yoke

terminal

#1 to

horizontal output transformer

terminal

#1. Use

original

yoke damping network,

if

necessary,

connect horizontal network

across

yoke

terminals

#3 and #7.

®

Use

original

rear

cover

and

centering

device.

®

Connect

yoke

terminal

#2 to

horizontal

output transformer terminal

#2,

yoke

terminal

#7 to

horizontal output

transformer

terminal

#1. Cut and

tape

orange

lead.

® Use

original

mounting

bracket.

ITEM

No.

M2

ORIG.

TYPE

1N64

ZENITH

PART

No.

103-23

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Zenith A2245E Disassembly Instructions Manual

Zenith A2245E Disassembly Instructions Manual

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