Sams Commodore 1701, Zenith ZVM-135 Technical Service Data

SJJMS_C_Q_M_P_U_~_ER_~_A_C_T._S_T"

________

M_O_DZ_EEL_N~T_

V~_.1_35

PRELIMINARY SERVICE CHECKS

This

data

prov i

des
designed
tions

Check

correct

for

quick isolation

_

all

interconnecting

hookup

before

DISASSEMBLY INSTRUCTIONS

the user

with

a time-sav ing service

and repair of Moni

tor

cables for good connection and

making

service

checks

_

too

malfunc-

l

~ CHASSIS REMOVAL

Remove four screws

:I:~

~>

re

move b

-N

sc

Z...J

Ww

move

NO

two

o

AudiolVideo Sync

~

fro m

Remove fo
botto
Swee p B

Remove

ack

rews fr

om

two

screws holding top brace

screws

AudiolVide

ur

m chassis. Di

oar

fou

holding rear

d and li

r s

TEST EQUIPMENT

Digital Volt/

Oh

High Voltage Probe

RT

Te ste r

C

shatch

Cros

De

gau

Generator

ssing

Item

holding

from set. Lay set

cabinet

bottom

. Li ft cabinet to p from se

jack

Board guides . D

o Sync Boa

screws

sconnec
ft

crews

rd

holding

t all cables from HV/

board

assembly

hol

ding

m Meter

Coil

Part

No

.

Release
Disconnec t all cabl

cabinet

facedown

back, l

ift

and remove

up and

t.

to

chassis. Remove

pane l and

two

screws

isconnect

holding

all cables

and remove board from set.

HV/Hor

izontal Sweep Board

Horizontal

from

cabinet

.

cabinet.

two

CRT REMOVAL

Re-

Follow
on a

soft
degaussing coil Conn
tor

(3S3A and 2A3), speaker Con n

control

to

screws holding cabinet fro

dicator

In
Remove four screws holding CRT

Main Board

to

cabinet

bottom

ground conn

.

TEST EQUIPMENT AND TOOLS

TOOLS

Phillips Screwdriver
Low Voltage Soldering Iron
Desol

PARTS LIST AND DESCRIPTION

Description

Item

two plastic

"Chassi

protec ti

Connecto

Connector

ecto

der

ing Too l

retai ning

es

from Main Board and

s Remova

ve

surface. Disconnect HV anode lead,

ector (3T

rs (3S8, TP7, 2A7 and 2

(Z)

and remove cabi net fr

rs and lift CRT from se

No_

Part

clips

holding Main Board.

lift

l"

proced ure and lay set facedown

8),

de flection yoke Connec -

ect

or

(4P4),

B7)

. Remove four

nt

to

chassis

. Disc

onn

to

chassis. Disconnect

t.

Description

board from

front

ect Powe r

ont

from set.

panel

#FX320 1

CR3224
CR3231
CR

3232/33
CR3234
IC2376

Q3208

R2125

RX

3299A

36

1

103-330
103-315-06
103-31
103-315-06
2

21

63

95-3603

r

t,.

l

ist

ing of any availa

conSlitut.

in any

Howa

rd

W. Sams & Co .. Inc .. as

replacement

om

informati

fr
manu

facture

-113-23

5-06

-17

9-0

1

-09063-02

-0

1

case

0

part.

The

numb.rs

on furn

ished

rs

of 'he

particular

AC

Fuse, 4A @250V

Fast

Act

ing
Diode 330GI
Rectifier
Rectifier

Rectifier
IC,

Trans

Cont

Focus, Part

Diode 315-6C GI SW1701 85-1640-01
Diodes H315F4 53201
Diode 315-6C

GI

ChromaiLuminance

Processor

tp

Ou

(221-179-1)

istor, Hor

izontal PCB, HV/Horizontal Sweep

ut (TZ1029-01) (9-247)

rol, Vertical PCB, Vid

Centering

(550 Ohms) PCB, Start-up

of

Trans- PCB, Width

R3441

SW001 85-1628

63-108

57

85-1559-02

former (TX3204) PCB, Control

Assemb

Howard

4300

ble

r.placement

recommendation,

to

of

to

Howard

type

ly # For SAFETY use onl y equivalent repl

W.

the

these

West

of

quality

W.

replacement

Sams

62nd

Street,

port

herein

warranty

or

and

suitability

ports

have

been

Sams & Co., Inc.,

part listed

does

guaranty

of

compiled

by

not

by contenf

such r

the
.

& Co., Inc.

P_O. Box 7092,

Reproduction

.

in

any

espect

to

the

~ 1985

Howard

.. 300

West

62nd

Printed

in

U.S.

Indianapolis,

or

U

S.,

wifho

monn.

r, Is

of

the information

W.

sams

Str

..

t,

Americo.

prohibited.

&

P.O

use

of

ut

expre"

Co

"

Inc

.

.

So.

7092 , I

85CB14946

Indiana

perminion,

No

contained

ndianapolis

patent

Cont

rol, Horizontal

Cen

ter

ing (100 Ohm
Swi tch, Green/Whi te
Switch,
Sw
PC

RG

B/Co mp.

it

ch, Power

B, AudiolVideo Sync

(9-230)

ai

n (9-22

eo

7)

Output

PCB, M

acement part.

46206 U.S.A.

of

editori

al or

dian

it

aSiumed

a

~206

pictoriol

wit

U.S.A.

h

liability

herei

, In

n.

DATE 1·85

s)

PRELIMINARY SERVICE CHECKS (Continued)

PRELIMINARY SERVICE CHECKS (Continued)

MISCELLANEOUS ADJUSTMENTS

SEE

INTERCONNEC

THE

NUMBER

CHECKS

DEAD MONITOR

(A)

(B)

(C)

(D)

(E)

(F) If the 26.9

(G) If

NO DISPLAY

(A)

(B)

(C) If

TO BE PERFORMED.

Che

ck for

nector

ord

C

If Po
(S3201) and Connec

If
chec
Power

If Power
good,

(03208).

it and
sistor

If

Transistor 03208
colle
for

(9·227).

the
not operate, replace the HV/Horizontal Sweep
Board

Check

be

If there is
video, replace
(IC23

the

Au

120VAC b

3R8. If v

and Conn

wer

Cord is good, check Power Sw

the

120VAC is present at

k AC

Fuse (FX32

Rectifiers

Rectifier

check the Hor

If

Transistor

check

0320

8.

ctor

of

26.9V at

defective

diolVideo

Transistor
the

V is

26.9V is present and

(9

·24

7).

the

RGB/C

no

76)

on th e AudiolVideo Sync Board.

video

displa

TING DIAGRAM,

IN

THE

CIRC

LES

etwe

en

olt

age is missing, check Power

ector 3R8.

tor

(CR3231 th

s (CR3231 thru CR3234) are

for

156V at the

cathode of Diode CR32

missing,

omp Switch (SW1701), it may

or

in wrong

display

the

Chroma/Luminance Processor

y does

Syn c Board (9·

pins 1 and 3 of Con-

3S8.

01)

izontal

03208 is defective, replace

is good, but the

03208

when using only c

Connector

. If Fuse is open,

ru CR3234)

Output

collector

is

missin

replace the Main Board

the Monitor

position

.

not

return, replace

230).

SERVICE CHECKS

WITH

Transistor

of

156V

g,

24.

check

Tran·

at the

check

PLACEMENT

THOSE

itch

3R8,

CD

CHART, AN

IN TH E FOLLOWIN G DATA FOR SERVICE

(D)

(E)

NO COLOR

(A)

(B)

(C) If there

(D)

@ NO FOCUS

still

does

(A) Check

(B)

@ DISPLAY DOES NOT FIT ON CRT

omposite

(A) Check

the

(B) Adjust

D PHOTOS TO

If

there is no
Compos
the

HV/H orizont
missing, repla ce the
(9

·247).

Check

Board.

If there is no
video input, replace
cessor (IC237

If

the

A

udiolVideo

the

Green/White

If only one
put

Boa rd by

tion.

If

the

fo

cus, check

substitution.

Board.

Centering

disp

lay when

ite

Video inputs

al

Sweep Board.

CRT and CRT

color

6)

on

color

does n

Sync Boar d (9·2

is

no

color

Switc

color

is

substitution.

the

Focus

Control

cha

racters on the

the

connectors

Horizontal (R34

controls

MATCH

using either

, ch

eck for 95V at TP3 on

HV/Horizontal

socket

on Video

when

using

onl y

the

Chro

the AudiolVideo

when

missi

.

ma/Luminance Pro-

ot

return, replace

30)

.

using RGB

h (SW001).

ng, check

(RX3299A) by s

displa

Video Output Bo ard by

P1A and

y are

P2

41)

and Vertical (R212

RGB

If

the

voltage

Sweep Board

Output

composite

Sync board.

input,

the

Video Out·

ubs

still

on the W

or

is

the

cheCk

titu

out

ith

of

5)

VIDEO INPUT CUTOF F ADJUSTMENT

Preset the Red (R1708) and
MINIM

UM. Ad
pears. Ad
tained. Readjust
pears.

APC ADJUSTMENT

Connect a color
Ohm Ja

·Up position

Set
movem ent of color. Return Plug A 1

RGB

CUTOFF ADJUSTMENT

Preset the Red (R2505
Cutoff Controls
(RX3499B)
Control
RX3499B

RGB

DRIVE ADJUSTMENT

Conn ect a video generat or to Video

vi

deo generator

Set
Red (R2506), Green (R251
for a white

VERTICAL CENTERING AND HEIGHT ADJUSTMENT

Adjus

t Screen

just

Vertical

ing Con
of CRT
CRT. Readju

SWEEP OSCILLATOR ADJUSTMENT

Ad

just

·

just

just

each

the

ck

until

trol (R21
an

Sweep

bar signal gener

(P7)

. R

otate

. Ad

for

until a dim raster

a gray raster is

until

raster disappear

raster.

Control (RX3499B)

Height Control

25)

d the bottom

st

Control (RX3499B)

Oscill

Blue (R17
Screen (R3499
Cut

off

Control

Screen

Service Plug (A

just APC Contr

),

Green

MIN IMU

for

an all

7)

and Blue (R25

(R3418) and the Ver

so the

top

of

raster is 1/2

ator

Coil (L3402) for a

14)

Cutoff

Controls

B)

until a dim

until

Control

M.

appears. Adjust each

obta

s.

white

of raster is 1/2

a gray raster is ob·

until

raster

just

ato

r to th e Video

1)

90 degrees

ol (R2390)

to

(R2

516

Ad

ined. Readjust Control

Input

raster signal. Adjust

until

until

for

MINIMUM

Normal

position

),

and Blue (R2527)

jus

t Screen Control

75 Ohm Jac k (

28)

Drive

a ras

ter

appears. Ad·

tical

inch

inch

from

raster disappears.

stable

raster ap·

disap

Input

to

Co lor

.

Cuto

P7)

the

Controls

Center·

from top

bottom

picture

95V ADJUSTMENT

for

Connect a DC
Transformer
95V.

·

PURITY ADJUSTMENT

If the CRT appears
to

75

ff

.

of

.

demagnetize the CRT and

sary,

perfo

the

purit

be

adjusted.

Cont

rols
and Blue (R2527) C
Screen Co
Green

Cutoff

scr

green

tr

green s
stripe. Turn Gree n Cuto
the

Red Cutoff

defle

ctio
ed. If necessary, r
red screen. Check the
ing each

CONVERGENCE ADJUSTMENTS

Connect a cross
Jack

(P7

of

the

Four Pole

Horizontal

Blue
Static

Magnet aroun d the neck
Red and
S

tatic Magnet
tal Lines. Rotate the Tabs
around the neck of the CRT to converge the Red/Blue and
Green Vertic

PU

RiTY

MAG:-.iHS

meter

to TP3 (pin G

TX320

4). Adjus

to

rm

center

y adjustment

Set th e Color Level , Bl

to

MINIMUM. Set

utoff

ntrol

until a dim

, Black Lev

een. Move

ipe. Ad

n yoke

Cutoff

) and tu ne in a

Blue

just

Control to
for

ward
eadjust

Control

hatch

Static Magnet

Lines. Rota te

Vertical Lines. Rotate the Tabs of the Six Pole

to

converg e the Red/Blue and Green Horizon·

al

Lines.

t 95V

be magnet ized use a deg aussing

mounting

convergence. Before proceeding

, the Screen

the

Controls

raster appears. Adv an ce the

el

and P

def

lection yoke

the Purity Tabs

ff Contr

produce

until a uniform

the

purity

one at a time.

generato r
crosshatch

of

of

Horizontal Ou

Adjust Control

bracke ts. If neces·

Control

ack

Lev

Red (R2505), Green

to

MINIMUM. Advance

ictu

re Con

tro

back to pr

to

ol to MINIMUM. Advance

a red stripe. Slide

red screen is obtain·

Purity

Tabs to

of all three

to

to

the

of

the Six Pole St

colors

the Video

patte

rn. Rotate
converge the Red and
Tabs

of

the CRT to con verge the

(R3

(RX3499B)

el

and

ls to pro

center

the green

obtain

by advanc·

Input

the Four

atic

tput

409)

with

must

Picture

(R251

duce

oduce

a pure

75

Ohm

the

Tabs

Pole

Magnet

for

coil

6)

the

a
a

@

®

R3499B

@A

SCREEN

95V

TP

POLE

Sf

ATle

MAGNc

T

4

POi

f:

SiATiC

MACN[

r

CRT NECK ASSEMBLY

HV/HORIZONTAL

SWEEP BOARD

II

PRELIMINARY SERVICE CHECKS (Continued)

PRELIMINARY SERVICE CHECKS (Continued)

/

AOOIO{OOT

IN(

~

,\::::>,ffi-+--4

/'"-

-1-

AUDIO/VIDEO

®®

SYNC

@)

SOARD

CHla'toVLl.tlI

®

297

If..

III

LL~

NANCE

PROCESSOR

~

IC2~S

I

,.1

L...LL

I

I

Y

l.IL

/'lAIN

BOARD

2A3

C:;]'

1

HV/HOR

SWEEP
SOARD

I

ZONTA

L

@@

fi-

-

-

2A7

-

-

--..

Q

-

1-

~

0B25

RGS

IN

R344

~

~

[;J C

I

HOAIZCWTAl
CfHTERIN6

01

1 E

@)

58

~

I X

R2125 @

VERTI

CAL

CENTERIN6

-fi

_

~

t:<::\

~

CR3224

3W3

• I

I.

~

IS4V

SOURCE

3V3

.

T3201

'-'

I!f-J

~

:

3S3

.----_+---

fll

J......l

,

TP3

@

FOCUS

~

3R3

~

L---

PIA

---+-----t-t-t--J

WIDTH
BOARD

f"5A\

\::!.Y

SPI

SPEAKER

INTERCONNECTING DIAGRAM

VI

!il'

I!.J

TPS

SHARPNESS

00000

TINT

COlOR9LACK

LEVEL

PICTURE

'~

!I'

=;;"

~

I I

lrh,

~

@=p~

sw

ITCH

~'r

26.9V

@@

SWITCH

AND

VOLUME

MOUNTIN6

0

VOlt.t£

CONTROl

BRACKET

I

-&

~
~

@

t;1

=TES
TIE POINT

353

~U

P2

~

~

INTERCONNECTING

DIAGRAM

III

PRELIMINARY SERVICE CHECKS (Continued)

PRELIMINARY SERVICE CHECKS (Continued)

PIN1

@

IC2376~

0.Y

R2390

APC

AJUS

1

RH08

RtD

CUTOFF

R1714.

I:lLUt

CUTOFF

Al

StHVICE:

PL

UG

3:

o

eN
mm

""'z

N-

<-4

3:~

.....

(,.)

C1'I

AUDIOIVIDEO SYNC BOARD

IV

AUDIOIVIDEO SYNC BOARD

V

<

<

3:

»

z

tD

o

»

:::D

c

L3402

SWEEP

OSCILLATOR

ADJUST

R3441

HORll

CENTERING

A250

REO

DRI

VE

A2517

GREEN

ORIVE~~

R2528-

BLUE

DRIVE

®

VERI

CI::NTERING

A2125

R3233

CR3234

VERT

HEIGHT

A3418

®

95V

ADJUST

A3409

@

CR3231

CR3232

26.9V

@

~

-

,..,

..

A.

2f

r

.xr:~.tiJ-A'L..&.~"e:-,

..

CA3224@

4A

AC

@C

FUSE

"'tJ

JJ

m

I'

-

s:

z

»

JJ

-<

CJ)

m

JJ

<

-

C')

m

C')

:%:

m

C')

CJ)

"

C')

-

o

::s

-

::::J

C

(I)

Q.

-

o

l>

tD

Z

m

":-'

:::D

m

»

:::D

<

m

::E

®
®

~@

~

@

~

®P

f3C\

GREENIWHITE

~

SWITCH

f2i0

V

SWITCH

1 F

®

R2527

BLUE

CUTOFF

P7

VIDEO

OUTPUT

BOARD

082

GB

IN

SW001

SW170

RGB/COMP

MAIN

BOARD

/

@

R2516

GREEN

CUTOFF

. f

1-,'

I

.':

rl

.'

( -.

120VAC

@

~~~1

@

P1A

WIDTH@

-P2

BOARD

Q3208

HORIZONTAL
OUTPUT

VI

HORIZONTAL

SWEEP

BOAR~

~

@

10

f1'"2\

&

@;

"'tJ

JJ

m

I'

s:

Z

»

JJ

-<

CJ)

m

JJ

<

-

C')

m

C')

:%:

m

C')

CJ)

"

C')

-

o

::::J

-

::s

c

(I)

Q.

-

a_

~

...

W~.

5

It)

C'?

":'"

:x::ii!

....

>

-N

Z....l

Ww

NO

0

:ii!

N

•

t--

I-

:E

(J

~

COM UT R ZENITH

_______

P

__

IE

__

PRELIMINARY SERVICE CHECKS

SAFETY PRECAUTIONS

See pages

8,

9.

FA_C

__

Ts_rM

Mode

l ZVM·135

ENCLOSED

______________

SERVICE INFORMATION

See page

~MO_D~EL_Z~VM_'1~35

3:

o

ON

mm

r""Z

N-

5.

<-4

3:::I:

B

lock

Diagram
Convergence
Disassembly Instructio
Gri dTrace Lo

AudiolVideo
HV/H ori
Main
Video Outp

High

Volt age Sh

cellaneo

Mis
Parts
Photos

AudiolVi
C

abinet

Co

ntrol Board.
CRT Neck
HV/

Adjustment.

cation

Guide

Sync

Board

zonta

Board . . .

List

Horizontal Swee p Board

The
constitute

Howard
replacement
from

manufact

l Sweep

........

ut

Board . . . . . . . . . . . 33

utdown . . . . . . . . .

us

Adjustments.

. . . . . . . . . . . .

deo

Sync Board . .

·Rear View . . . . . . . . . . . . .

Assembly

listing

of

any available replacem

in any

cose a recommendation,

W. Sams &

Co., Inc.

port. The

information

urers

furnished

of

the

..

......

. Photos (Continued)

ns . .

Board.

.

. .

...

10,1

. . ....

...•.

Howard

West

4300

ent

, as

to

the

to

of

Howard

type

quality

these

parts hO\lle

W. Sams & Co .. Inc. .

of replacement

numbers

partlCulor

.

.........

20

thru

1,12,37,38,39

.

....

..... 17,18,

W.

Sams

62nd

port

herein

warranty

or

cnd

suitability

been

port

INDEX

Page

....

4

'"

. 7

45

. .

.36

...

18

. 34

..

5

. 7

29

.45
. 19

7

32

Street.

does not

gua

ran

of

compiled

by

listed.

Horizontal Output Board
Main Board
Video

Widt
Placement Chart
Resistance Measurements .
Safety Precautions
Schematics

Notes .......

Power Supp ly ......

Termi nal Guides . .
TV

..
Service I
Servicing in the Field.

Troubl

eshooting.

Troubleshooting

..

Output

h Board

nformation

& CO., Inc.

P.O

. Box 7092.

Reproduction or

ty

by

content, in

such raSpEKf

~

1985

the

"300

Pr

inled in

cny monner

to

the

How

ard

West 62nd

U.S. of

Indianapo

use, without

us.

of

W.

Saml

Street

America.

. ....

.. ..

Board

.........

.....

...

Aid

lis .

express

, is

prohibited.

th.

information

&

Co.

, Inc.

. P.O . Box 7092. I

Pa

ge

........

.

. . .

........

. . . . . . .

. .

. 13,14,15,

. .

... 31

35

.. 16,33

...

30

..

. . 43

.8,9

. . . 5

.3,46

6

. ... 44

.2

,47,48,

49

.

....

5

. . . .

45

.41,42

.....

.. ..

40

Indiana

permissi

No

potent

containe

ndianapo

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SERVICE INFORMATION

HIGH VOLTAGE SHUTDOWN DEFEAT

CAUTION: Care
Voltage
voltage and
(T
T
be
troubl esh
tion
supply.

To
CX3209 and l
shutdown circuit, ch
(OX3202). If
check
dow

"Shutdo

moni tor in shu

NOT

ITEM

OX3202
03204
0 3207

Shu

X3204

), CRT

ransformer

comes excess

oot

trans

defeat

the volt

n Transistors (OX3202,

wn V

E:

Vol tages are measured with monitor in s

sho

tdown Circuit

damage

a set with excessi

form

the shutdow

ift

the shutdo

uld

to

or

other

TX3204.

ive,

do not

er with a

from

the

eck for a shorted Switch Transistor

ages and

olt

age

Chart

tdown.

SHUTDOWN VOLT

E

OV

7.1V

1.5V

be taken in

whi ch may cause

the Ho rizontal

circu

its

Monitor

stepdown

n circu

board.

wn

comp

" fo r

the

defeat

the

ve

high voltage, use an isola-

control

it

unsold

If

this does

circuit

is not

onents

03204

voltages

AGE CHART

B C

0.

76V

6.4V

2.25V

and 03207) . See

defeating

Output Transformer

supp

high vo ltage,

shutdown

er one end

worki

asso

measured

excessive

lied B +

circ

as an AC

not

ng properly,

ciated

hutdown.

0.02V

7.03V

1.51V

the

uit. To

power

of

Diode

defeat

with

with the

Shut-

SCHEMATIC NOTES

High

high

from

if

the

the

HIGH VOLTAGE SHUTDOWN CIRCUIT DESCRIPTION

The high voltage is

horizontal pulse , at pin N
Transformer (TX3204). The pu Ise, r

CR3206, is appl ied

Zener Diode CRX3204 then

it

Transistor
the
begin to
Shutdown
Transistor
base of
Diodes CR3209 and CR3211, and
to
cause the Forward Driver
disable
cuit
TX3204 at pin D thru
TX3204 breaks down, the arc
Transi
start Transistor
circui

(03207). If the

Diode CRX3204 will

conduct

Transisto r

03204

Switch

conduct. When

the horizontal drive and

. The

stor

t.

shutdown

03207

monitored

to a resistor

and apply

03204

conducts

Transistor

Transistor

circ

Resistor

to

go

negative w

03207

conducting,

by

of

to

the

high

vol

tage

conduct,

enough

to

cause: it

a bias

(OX3202)

causes

OX3202

Transistor

shutdown

uit

also

RX3206.

transient

ith

rectifying

the

voltage

base

becomes

Transistor

voltage

voltage

thru

(03206)

monitors

causes

respect to

activating

the

60V

pop

Horizontal Output

ectified

to

Transistor

by

divider

of

the

Shu

excessive,

03207

to

the

conduct.

is

applied

Resistor

conducts,

to

conduct

the

horizontal cir-

Transformer

If

Transformer

the

the

the

shutdown

Diode

network

tdown

base

When
to

RX3204,

OX3202

it

emitter

base

will

the

will

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to

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Circuitry
Circu

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Waveforms

Waveforms

Tim

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Supp ly voltages
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Term inal i
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El

Resis
Value in ( ) used in
Measu

not

used in

it

ry

used in

ist

ound

tie

point

and voltages taken from

otherwise

75 Ohm Input J

e in fLsec. per cm, given w

each waveform.

stment

ju

lt

ages measured

ectr

noted

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taken using a col

instruction

rols

adjusted

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are

olyt

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are V2W

rements

some

some

versions

ack

(P7) unless noted.

in

rectangles

s.

maintai

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with digita

for

norma

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50

vol

ts

or

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are

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some

with sw i

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versions

ground

, unless

or

bar signa l app lied at Video

ith

pop

reading at the end

appear in the alignment/ad-

l meter,

l operation.

not

less,

50

5%

versions

as show n, unless noted.

no

signal.

be found on uni

5%

unl ess noted.

volts

or less, 20%

unless noted .

.

t.

unless

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5

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MISCELLANEOUS ADJUSTMENTS

VID EO INPUT CUTOFF ADJUSTMENT

Preset

the

Red (R1708) and Blue (R1714)
MINIMUM. Adju
pears.

Adjust
tained.
pears .

APC ADJUSTMENT

Connect a color
Ohm
Set-Up
movement

RGB

Preset
Cutoff
(R
Control
RX

RGB DRIVE ADJUSTMENT

Connect
Set vi
Red (R2506), Green (R2517) and
for a white

VERTICAL CENTERING AND HEIGHT ADJUSTMENT

Adjust
just
ing
of
CR

SWEEP OSCILLATOR ADJUSTMENT

Re

Jack

position. Adjust

CUTOFF ADJUSTMENT

the

Controls

X3499B)

until

3499B

a video

deo

Screen

Vertical

Control

CRT and

T.

Readjust

st

Screen (R3499B)

each

Cutoff

adju

st

the Screen

bar

(P7).

Rotate

of

color

. Return Plug A1

Red (R2505), Green (R2516), and Blue (R2527)

for MINIMU M.

until a dim

a gray raster is

until

raster

generator

generator

raster.

Control (RX3499B)

Height
(R2125) so the
the

bottom

Control (RX

Con trol

Control

signal

gen

Service Plug

raster appears . A

disappe

for an all white raster signal.

Cont

erator

APC

Control

obtained

ars.

to Video

Blue

rol (R3418) and the Vertical Center-

top

of

of

raster

3499

B)

Cutoff

Controls

until a dim raster

until

a gray raster is ob-

until

raster

just

to the Video Inp

(A

1)

90 deg rees

(R23

90)

to

Normal

Adjust

Screen Co

djust

. Readju

Input

75

(R2528) Drive Controls

until

a raster appears. A

raster is 1/2

is 1/2 inch fro m bott

until

raster

for

MINIMUM

position.

each C

st

Ohm

Jack

Adjust

inch

disappears

to

from top

Control

for

ap-

disap-

ut

Color

ntrol

utoff

(P7).

the

om

95V ADJUSTMENT

Connect a DC

Transformer

95V.

PURITY ADJUSTMENT

If the CRT appears to be magnetized use a
to demagnetize the CRT and

sary, perform

75

the

purity

be adjusted . Set the

Contro

ls to MINIM UM. Set
and Blue (R2527)
Screen
Green

Cutoff

green screen. Move

stripe

green
stripe.

Turn Green

the Red
deflection
ed. If necessary, readjust the Purity Tabs to
red screen. Check the

ea

ch Cut

ing

CONVERGENCE ADJUSTMENTS

Connect a
Jack

(P7)
of the Four Pole
Blue Horizontal Lines. Rotate the Tabs

d-

Static

Magnet around the neck
Red and Blue Vertical Lines. Rotate
Static Magnet

of

tal Lines. Rotate the Tabs

.

around the neck
Green Vertical Lines.

meter

to TP3 (pin G of

TX3204).

center

adjustment

Control

, Black Level and

. A

Cutoff

yoke forward

off

crosshatch

and tune in a

Adjust

convergence. B

, the Screen

Color

Cutoff

until a dim

deflection

djust

the Purity Tabs to

Cutoff

Control

Control

to converge the Red/Blue

to

until a uniform

purity

one at a

generator

crosshatch

Static Magnet

of

the CRT to c

95V A

Level, Black Level and

the

Controls

raster appears.

Control
produce

of

Hor

izontal

djust

Control

mounting

Picture

of

of

the

brac

efore

Control

Red (R2505), Green (R2516)

to MINIMUM

Controls

yoke

back to

to

MINIMUM. Advance

a red stripe.

red screen is

all three

time

.

to

the

Video

pattern. Rotate

to

converge

the CRT to

the

Tabs

and

Six Pole

onverge

(R3409)

degaussing

kets

. If
proceeding
(RX3499B)

center

colors

of

Green

the Red/Blue and

Picture

. Advance

Advance

to

produce

produce

the

Slide

obtain

by advanc-

Input

75

the

the Red and 0 N

the

Four

converge

of

the Six Pole < -I

Horizon-

Static

Magnet

Output

for

coil

neces

with

must

the

green

the

obtain·

a pure

Ohm

Tabs 0

Pole

the

a
a

-

s::

~

N-

s::

~

Co)

UI

m

Z

Z

Adjust

Sweep

Oscillator

Coil (L3402)

for a stable

4

POLE

STATIC

MAGNET

picture

.

PURITY

MAGNETS

POLE

SlATIC
MAGNF

r

CRT NECK ASSEMBLY

7

SAFETY PRECAUTIONS

PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS

CAUTION:
tempted
are
checks
the

risk

Afte
check

SUBJECT: FIRE & SHOCK HAZARD

1.

Be sure
way as
shorts. This
which

2.

Never release a repair unless all
as i
othe

3. Soldering
solder
cluding AC cord),
Be

4.

Check
ponents
tion

lead

5.

No
resistor
protruding

6.

All critical components
diagram)
tors, etc. mus
not
ified

After
leakage
metallic
knobs,
the set is safe
shock. DO
ER
5000
manner;
(63
capaci
(water pipe,
parts,
combination
Reverse the AC
ments
sured
to
stitutes a potential shock
immediately.

No

modification

. Service

thoroughly familiar

aod servicing guideli nes. To

of

r the

original

shou

are

nsulators

r hardware have been

cer

tain

the

and replace
length

lead

use

or

re-assembly of the set always

antenna

DURING THIS TEST. Use an AC

ohms

-10401-76), paralleled by a .
tor

one

for

must

0.5

milliamp AC.

work

potentia

ld be made

joints,

or

rated at 1

replacement
make

test

l hazards and injury

SAFETY CHECKS

service problem has been co rrected, a

that

all

to

for

parts

components

avoid

is

especially

transported

, barriers, covers,

must

be i

frayed leads, damaged in sulation (in-

solder

to

remove all l

"across-

physical

if

and

dress

component

metal

surfaces

such

as

t be replaced

unrecommended

at

DC

of

terminals,

to

NOT USE A LINE ISOLATION TRANSFORM-

per volt

Connect

(22-4384) between a

conduit

at a

time

of

1500 ohm

plug

each

exposed

not

exceed .75

of any

should

be

wit

h all

of

the

following

possibility

important

to

and

from

shie

reinsta

nspected

the

evidence

necessary.

.

watt

fuses

components

ground

the

operate

or

a 1500

, etc.) and the exposed

. Measure the AC voltage across the

and repeat AC voltage measure-

Any

to

splashes

oose foreign

-line"

capaCitor and

should

touch

or

more. Lead tension around

must

(shaded on

, fl

ameproof
with

test

cabinet, (the cha nnel

handle

without

more

sensitiv

known

resistor

metallic
volts

value

hazard and

performed

of

are

of

circuit

point

ohm

exceeding

circui

t should be at-

only

after

you

the

following

do

otherwise increases

to

the user .

:

positioned
adjacent

on

the

repair shop.

protective devices such

lds,

stra

lled per origin

discover possible

or

sharp solder

particles.

of

damage

Follow

original layout,

a receiving tube or a

be avoided.

the

resistors, capaci-

exact

Zenith

other

than those spec -

modifications

perform

and on all exposed

and screws)

danger

voltmete

ity, in the f

10

watt

15

mfd

. 150V

good earth gro und

and .15 mfd. capacitor.

part. Voltage mea-

RMS. This corres ponds

must

safety

in such a

compo

nent

those

chass is

in reliefs, and

al

des ign.

co ld

points

other

com-

or

deteriora-

sc hematic

types.

an AC

selector

to

be sure

of el

ectr

r,

having

ollow

resistor

AC

type

metallic

this

limit

con -

be corrected

Do

.

ical

ing

I

~

o A.C. VOLTMETER 0

22-4384

.

15

MFD

TY

A.C.

TO

GOOD EARTH GROUND 1500 ohm 10
SUCH AS WATER PIPE,
COND

UI

T. ETC. ON EACH EXPOSED

.

SUBJECT: IMPLOSION

1. All Zeni

2. Use only recom mended Zenith replaceme

SUBJECT: X-RADIATION

1.

2.

3.

th

picture

pl

osion

protection system , but care should be take n
avoid damage
tube.

Be

sure procedures and in
sonnel cover the
tial source of X-r
tube

. However,
H.V. is at the factory specified leve
H.V. is ex cessive that X-r
fer

to

the

X-ray Precaution Lavel which is located
each television receiver f
proper value is
manua

l.

Operation at higher volt ages may cause a
failure of the pi
under certain
ex

cess of desirable levels.

Only

Zenith

speci fied CRT anode
used. The degau
shield in

II is
curate and
of
reference standa rd, such as the one available at your
di

color

essential that

the

mter

stributo

r.

re

liable high voltage meter. The calibrat ion

sho

63-10401·76

tubes are

during installa

sub

ay

s in

this

al

so given in the app

cture

circumstances

ssin

sets, do not defeat its

uld be checked periodically agains t a

equipped

struct

ject of X-radi

current

tube

does

ad

iation may be generat ed. Re-

or

th e correct high voltage. The

tube

or

g shield

the serviceman has available

I

PE

watl

PLACE THIS PROBE
ON

DC

GROUND AND

METALLIC P

with

ti on.

AVO

ions

atio

n. The only poten-

TV receivers is the picture

not emit

l.

It is on ly when the

high voltage supply and,

, may prod uce radiatio

connectors

also

serves as

AR

T.

an

integr

al im-

id scrat c

to

purpose.

hing

nt

tube

s.

all service per-

X-rays when the

inside

lica

ble service

must be
an X-ray

an

to

the

n in

ac-

Courtesy of the Ma

nufacture

r

8

SAFETY PRECAUTIONS (Continued)

4. When the
there is
tim
be run up and
w

ith a meter

exceed the

rec

tion review
always

that
cu

stomer's

5. When
in a receiver

avoi d being unnecessarily close

the high vo

cha
excessive

6. Col
Line and l

desi gned
causing

mended that the C.R.T.
the n

.V

H

advisable. The C.R.T. 's in

replaced w

cess

ex

7.

Star
special
feature,
defeat
viced, f
capa
(used in

must

(22-7504-01). Please refer

No. 8

questi

high

no possibility

e a color

tly

. We

check

the

tr

oub

ssis longer

or

tra

nsis

ew

type

. m

eter

ive X-radiat io n and

ting

four

ed. However, each time one

or

citor shoul

be replaced

7)

for

ons,

volt age

of

chass

is is serviced,

dow

n while

to

be certai n

spec

ified value and that it is regu

sugg

est

test

high voltage reading be recorded on each

invoice.

leshoot

lt

voltage.

ater

to

withstand

excessive

to

ith

with

the interlock

whatever reason ,

"E

" and "F" model li nes only), th

the detai

or

that

proc

edures so

ed as a

with a prob

tor sets manu

tub

the

you may

sta

ing and

age

com

partmen

tha

n is necessary to lo

),

use new

higher operat

X-radiation. It is

e.

Additi

H.V.

anode

any

other tube

late

produc

lead damper c

ing f

d be examined.

with

an i

ls.

Your

write

circuitry

an X-radi

that

you and you r service organiza-

nd ard

lem

type

shop

on

possib

is

operating

ation

the

brightness

monitoring

the

that
servicing

making

of

t.

fact

ured after

pict

fixture

of

a permane

of

the

these sets

types as

tion " E"

apacito

our

the

mproved recommended

to

Zenith Tech

distributor

to Zenith for

the

high

volt age

vol

tage

test

excessive

to

the p

Do n

cate

ure tubes

ing vo

strongly

be equi

shop C.R.T. fixture is

shou

that

le violation of

line

r was

leads,

of

these

part n

If

it

is

the

proper

proble

m. Every

high

does not

lating

regul

procedure, and

meas

urements

high

icture

tube

ot

operate

the

cause

June

, 1973 (" E"

specif

ltages

pped with

ntly connec

ld never be

may

result

the

color

use

should not

set

umber

22-7233 type

at

capac itor

Top

ics (Issue

will

answer

further

shou

voltage

cor-

ation

voltage

and

the

ically

without

recom-

ted

law.

sets
d.

s is ser-

of

the

type

any

detai

ly

SUBJECT: TIPS ON PROPER INSTALLATION

ld

1.

Never install any receiver in a c losed-in rec ess, cubby-

is

,

of

in

, a

Its
be

ls.

hole or closely

2. Never

3.

4.

5.

6.

7.

8.

9. Caution cus

insta

the path of heated air flow.

Avoid

conditions

install

atio

where stea m leakage is a f

Avoid placement where drap erie s may
venting. The cu
decorati
obstruct

Wall and shel f mounted in stallations
mount

ing kit,

ting i

nstructio

A receiver
original feet (or the equivalent thi
provide adequate air
screws used for fastene rs
wiring . P
tions.

Caution
on a sloping she
receiver is properly secured. m

A receiver
mounti

ng to the cart. Caution
hazards
thresho

which has n
Inc.

for

receiver.

fitting

shelf space.

ll a receiver ove

of

high

hum

ns where dew is a factor, near

ve

ventilation.

customers against

of try

lds

stomer

scarves or

must

foll

ns.

mounted

erform

in

or

use with the

to a shelf

leakage t

lf

or in a t

a roll-

about

ing to roll a cart

deep pile

tomers against

ot

been l

isted

other

ow

flow across

carpets

ir

r,

or

close

to

a heat duct, or in

idi ty

suc

h as;

stea

actor, etc

sho

the

mus

ests

the

cart should be

by U

speci

.

uld also avoid t

coverin

gs which might

usin

factory

or

t not touch any

ilted posi

wit

.

the use

nderwriters Laborato

fic model

approved moun-

platform

cknes

s in spacers)

the

botto

on customized installa-

mounti

ng of a receiver

tion,

the

custo

h small

of

a cart or sta nd

outdoor

obstruct

g a commerc

must

casters

of

pat

m radi

ators

he

use

retain

m.

Bolts

parts

unless the C

stable

in its

mer on

across

tel evi

io

rear

of

ial

its

to
or
or

the

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1- 8

RX3

C2

131

C21

52

C3

202

C32

03

C

32

06

C320

7
C3209
C32

10
C3211
C3212
C32

13
C32

14
C32

16
C3217
C3218
C3233
C3

244

C3261

C32

76
C3277

CR3202
CR3203
CR

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CR32

05

CR32

06

CR320

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08

CR32

09

CR32

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CR3211
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CX32

04

CX32

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3251

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L3207
L322

0
LX3261
L

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62

Q32

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Q3206
Q3

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QX3202
QX320

7
R2105
R21

10
R2111
R3

207
R3209
R3219
R3224
R322

5
R3226
R322

7
R322

8
R3242
R3243
R3244
R

32

50
R3251
R3261
R3262
R32

63
R32

64

R32

79
R3282
R32

99A
R32

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RX3206

RX3208

RX3210

R

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ZENITH

PART No.

3-142-01

103-142-01

10

103-254-01

1

11

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103-336

103-142-0

10

1

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WORKMAN

DATA

RCA

REPLACEMENT

PHILIPS

NEW·TONE

GENERAL

WEP10

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PART No. PART No.

SK9091

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177

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PART No . PART No.

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PART No.

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GE-30

Description
and

Number,
Part

Model,

state
,

parts

ordering

PARTS LIST AND DESCRIPTION

When

~

MFGR.

TYPE

ITEM

SEMICONDUCTORS (Select replacement for best results)

PART No.

No.

No.

- 01

103-254

103-142-01

103-142-01

42

142

TI1

ITI

I

H28404

01

01
17

1703

hru
t

CR

CR13

CR

CR1714

1 GE-50

254-0
3-

3-301-13

03-336-11

10

10

1

103-142-01

42

739A

TI1

N4

I

1

M33611

15
17

1722

I 724 TZ4E254

CR

CR

CR

CRI725

42-01

1
3-

ITT1 42 10

I726
CR

thru

1

3-254-01

3-142-0

10

10

254GI

CR2104 R142

CRI728

CR2105

1

1 GE-50

01

-

03-142-0

03-254-0

1

103-142

103-279-14

42
TI1

I

MK279-14

CR2199 R142

CR2106, 7 H254E4 1

CR2108

CR2254

thru

CR2256

01

3-142-

03-142-01

10

1

142
TT

I

01

r u

CR25

CR2503A R142

CR2503

th

1

3-254-0
10

GI

06

504 254

hru
t

CR2

CR25

103-142-01

42
R1

4

CR251

- 01

-142

3-142-01

ZENITH

PART No .

10

103

62/ 177
10

1062/ 177

PART No.

WORKMAN

EP

W

WEP

01

2-01
14
3-

3-142-

10

10

77
1

/177

621

P 1 0
WE

WEP1062

2- 01

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3
10

77
/1

062
EPI

W

5

-330
03

03-30

1

1

103- 330

525

2/ 177
06

10621177

EPl77/

W

WEP

WEPI

-Dl
84

3-309

03-2

1

10

019

06

/5

I72/5

1420

WEP

WEP

01

-295­103

F- 16147

/177
62
10

WEP

1

1

42-0

1

3-295-0

03-

10

1

103 - 326

/177

/177

/ 506

62

62

l72

10

10

WEP

WEP

WEP

-1 42-01
03

1

WEP1062/ 177

1

01

-0

-142

3-254-

103

10

177

/ 1 16

62/

P158
WE

WEP10

1
4-0

25
3­10

/116
58
P1
WE

326
103-

/506

WEP172

330
3-

03-330

1

10

7

77

17
62/

WEP10

WEPI 06211

6

15-D6

15-0
3

3-3

3­10

10

06
5-

1
3-3

10

3-284
10

06
72/5

WEPI

3-254-01
10

P158/ 116
WE

ption
ri

sc

, and De

mber

PS

REPLACEMENT DATA

LI
PHI

NEW·TONE

GENERAL

.

.

No

MFGR

PART

177

RCA

PART No.

9091/
SK

NTE ECG

PART No . PART No.

PART No.

ELECTRIC

177

11 77

91/

91

90

K90

S

SK

I77
G

EC

ECG177

ECGI77

E 177

E 177

TEI77

NT

NT

N

0

-300

-30
C£

C£

GE-3 00

1

01

-0

-01
42

142-

-142
3-

03-1

103

1

10

1 177

1 1 177

091

909

K9

SK

S

ECGI77

ECGI77

177

E 177

TE

NT

N

-300

-300

C£

GE

1

01

-0
42

03-1

103- 142-

1

77
/1

/ 525
25

9
SK3

SK9091/ 17 7

SK9091

ECG525

ECGI77

ECGI 77

77

525

EI

E 177

TE

N

NT

NT

00

00

-3

-3
GE-533

C£

C£

0

305

33
3­10

103- 330

103-

2
/55

00
90

SK10A/501 9A

SK

G552
EC

ECG5019A

52

5019A

E'5

TE

NT

N

l 0

11

- 5

ZD-

C£

GE

09-01
3-3

103- 284

10

52

1177

1/ 177

9000/5

909

)
7(1

F-1 614

SK

SK

2

I77
G

CG55

E

EC

552
E

NT

NTE 177

11

- 300

C£-5

GE

-01
295

3­10

103-326

SK9091

ECGI77

NTEI 77

0
30

GE-

01
2­14

3­10

SK9091/177

ECG177

77
EI
NT

GE-300

1

-0
295

103-

/ 177
091
SK9

GI 77
EC

177
TE

N

-300
GE

-{)1
142

3­10

16

13/1

SK33

SK9091 I 177

6

I77

11

ECG

ECG

NTE116

GE-504A

01
254-

3­10

16
/1

313
SK3

177
NTE

00

-3
C£

1

-0
42

1
3-

10

16

ECG1

16

NTE1

4A
50

GE-

01

3-254­10

2
/55

91/177

00

K90

SK90

S

2

GI77

CG55

EC

E

EI 77

E552
NT

NT

GE-511

326
3­10

091/177
SK9

ECGl 77

77

1
NTE

C£-3 00

GE-300

0

0
33

33

­03

03-

1

1

6

06
5­31

-315-D

3­10

103

/552
9000

SK

ECG552

52

NTE5

11

- 5
C£

5- 06

284

31
3-

03-

1

10

3/116

SK331

~·lllN:>

6
G11

EC

1300W

6
11

E
NT

GE-504A

01
254­103-

H1IN3Z

9£~·WAZ

Model, Part Nu

state
,

rts

PARTS LIST AND DESCRIPTION (Continued)

When ordering pa

.
No

TYPE

No.

ITEM

SEMICONDUCTORS (Select replacement for best results)(cont)

2
14

R

25
R25

C

ITT142

41
5

R2

C

42
TT1

I

CR2543

42
TT1

I

545
CR2

ITT41 2142

3202
CR

8C
4 1

05G1

ITT3304 19

3

330GI

3203
CR

CR3205

CR3202A

ITT

-01
309

5A
320

CR

284
4C
TZ

CR3206

-01

295- 1

295

208
R3

C

CR3207

42

326
4A

TT1

I

TZ

3209
CR

CR3208A

ITT1 42

0
321

CR

54E4
H2

210A
CR3

142
TT

I

11
2

CR3

I
54G

2

A
11

CR32

2K4
H31

B
11

CR32

I
I
30G

3

19

CR32

330 GI

3,24
322

CR

GI

4

CG

5F

1

5-6

315-6C

31

H3

231

232,33

R3

C

CR3234

CR3

4C254
TZ

H284D4

CR3276

CR3235

h)

39-4

26

3

A3

4F

4

TZ

TZ

339G I

217
R3

CR32 14

CR32 12

C

ZENITH

1

-01
42-01

3-142-0

103-1

10

103-142

01

-14
79

3-142-

3-2
10

10

9-19

06

7

3-3

3-2

10

10

96
1-

1-105
22

22

1-290
22

-130
221- 179-{)1

221

221 - 264

66

95

21-6

121-9

1

695
121-

19

-10
121

1096

­121

121-1084

- 1096
121-695

121

121-1019

121-1096

121-499-01

019

-499-{)1
21-1

121

1

62/177

PART No. PART No.

WORKMAN

WEP10

.
No

DATA

RCA

91/177

PART

SK90

REPLACEMENT

ECG

PHILIPS

PART No.

GI77
EC

E

TON

·
NTE

PART No.

NEW

ERAL

GEN

TEI77

N

PART No.

ELECTRIC

~-300

177

1 77

/5014
415

062/

10621177

10621
P

P1

WE

WE

WEP

WEP1

14A

/177

1/177

6/50

91/177
SK90

SK9091

SK909

SK6A

77
GI

ECG5014A

EC

ECGI77

ECG177

4A

177

EI77
NT

NTE

NTEI 77

NTE501

00

00

GEZO-6.6

GE-3

~-300

GE-3

123 1
31/

WEP1420/501 9

WEP12

231

01

/1

10A/5019A

SK902617

SK

SK3632

23l

701

ECG1

ECG

ECG5019A

231

701

E5019A

TE1

NT

NTE

N

GE-1231

~ZO-10

736/123A
WEP

WEP62/159

3AP
159
6/

K346

S

SK3654/1 2

AP
59

1

123

CG

E

ECG

E159

NTE123AP

NT

-62
GE-123AP

GE

EP736/123A

WEP62/159

W

3AP
12

6/159

4/

46
SK3

SK365

AP
23

ECG1

ECG159

123AP

NTE159

NTE

~-82

GE-I23AP

WEP736/1 23A

123AP
54/

SK36

123AP
CG

E

3AP
E12

NT

GE-123AP

9
/15

6/123A

3

62

WEP736/123A

WEP

WEP62/159

WEP7

66/159
34

SK3854/123AP

SK

SK3466/159

SK3854/123AP

9

123AP

159

CG15

CG

CG

E

NTE123AP

E

159
NTE

E

ECG123AP

23AP

159

NTE1

NTE

AP

~-62

~-123AP

GE-62

GE-123

Description

, and

Number

el, Part
Mod

state

parts,

rdering

PARTS LIST AND DESCRIPTION (Continued)

Wh en o

10,)

10,)

SEMICONDUCTORS (Select replacement for best results) (cont)

MFGR.

PART No.

No.

TYPE

.
No

ITEM

1

-01

2-0

- 14

-142
03

1

103

42

142

TT1

ITT

I

CR3401

CR3404

1

-1 4
79

142-01

­103-2

103

103-142-0

-14
79

ITT1 42

R142

MK2

06

CR3405

CR34

CR3406

9
9-1

7

308

-

103-2

103

TT

-141

0864

9
27

MK3

204

CR3409

CRX3

I

II

105

-96

1­22

221

105

221-

221 - 96A05

1

1

45
IC 1

IC130

90
1-2

22

01
0-

-29
221

1

ICl70

0

79-{)1

264

-1

1-

22 1

22

221-13

9-1

264

-130

1-17

1-

22

22

221

401

2376

C3

I

IC1702

IC

95

66

121-9

121-6

966

895

3,4

2
120

Q120

Q

695
21-

895 1

thru

Q1701

Q1707

19

121-1084

121-10

1019

1064

thru

thru

706

717

Q1

Q1

Q1716

Q1722

6
09

1
1­12

121 - 1096

96

1096

10

Q1726

QI723

121-1096

121-695

1096

1064

895

Q1727

QI726

-499-{)1
21-1019

1

1 21

1019

499-1

u

0

thr

,3

Q1733

Q1731

Q1729

1

19

1-499-{)
12

121-10

1
9-

1019

49

734
Q1

Q1735

ZENITH

WORKMAN

-1084
121

PART No. PART No .

51

1019

1-5

21-

12

1

29
/2

2/159
6

WEP

WEP956

95

-8
121

/ 123A
36
P7
WE

-895
21

1

121 - 1019

A
123

59

/
36

WEP62/1

WEP7

1072-01

- 975

1-

-l0896

21

12

1

F

1
/29

P736/123A
WE

WEP780

064

1

121-699

121-

P62/159
WE

WEP62/159

551

-1019
21

121-

1

229

/159

6/
95

P
WE

WEP62

-1019
121

019

551

-

- 551
121

121

12 1- 1

/229

561229

956

9
WEP

WEP

WEP62/159

WEP62/159

1019

1019

-

1-

21
1

121-966-02

12

159

5/152

/159

4

62/

P62

EP

WEP7

WE

W

121-499-01

FI2737

WEP736/1 23A

37

3

0

1034

97

-

21-1059

121-

121

121-1

1

P702/171

P62/159

EP62/159

EP702/171

WE

WE

W

W

ion

Descript

DATA

RCA

PART No.

REPLACEMENT

ECG

PHILIPS

No. PART No.

NTE

PART

NEW·TONE

No.

PART

GENERAL

ELECTRIC

AI229

6/ 159

S1<346

SK3246

9

9

ECG15

ECG22

229
TE

N

NTE 159

GE- 82

GE-6 1

AP

9

23

466/15
K3

S

SK3854/1

P
3A

59
CG1

ECG12

E

159
NTE

NTE123AP

GE-123AP

GE-82

23AP

0/291

854/1
SK3

SK344

23AP

291

ECG1

ECG

NTE291

NTE123AP

P

302
GE-

GE-123A

AP

159

SK3466/

SK3466/159

S1<3854/12 3

G123AP

ECG159

ECG159

EC

3AP

159

159

12

NTE

NTE

NTE

3AP

GE-82

GE- 12

GE-82

1229

466/159
K3

SK3466/159

SK32 46A

S

159
ECG

ECG159

ECG229

159

E229

NTE159

NT

NTE

-61
GE-82

GE-82

GE

9

229

246A/

466/15
K3

K3
S

S

ECG229

ECG159

159

229
TE

NTE

N

GE-82

GE-61

9

/229

246A

466/15

466/159
K3

K3

SK3

S

S

ECG159

ECG159

ECG229

59

229

E 1

NTE

NT

NTE159

-82

GE-82

GE

GE-61

93/152

SK38

ECG152

152
NTE

-66A
GE

71
/1
01

466/159
SK3

S1<3466/159

SK3854/123AP

SK32

S1<3201/171

AP
3

159
ECG

ECG12

NTE123AP

AP
23

GE-1

ECG171

ECG159

9
15

E159
NT

NTE

NTE171

GE-82

GE-27

GE-82

ECGI71

171
NTE

GE-27

~·llIl\lO

1300W

H1IN3Z

S£~·WAZ

and

te Model, Part Number ,
sta

dering parts,
or

PARTS LIST AND DESCRIPTION (Continued)

When

MFGR.

PART No.

No.

TYPE

No.

ITEM

SEMICONDUCTORS (Select replacement for best results)(cont)

-1019
1-895

21

121-551

121-1084

1

12

51

019

1

1084

5

895

739

736

1738

01737

01

01

0

019
1-1

12

1019
u

hr
t

43

1740
0

017

121-895

895

thru

746

744
01

01

-01
75

072

-1

-9

21
1

12 1

F-l0896(2l

ITT975

1072-1

02 103

02101,2

064
1-1

12

4M
106

021 04

9

1-69
12

99
6

2215
0

1

019

- 1

-55
121

121

1019M

551M

2502
0

02501

019

1

551

-

21-

121

1

551M

Rl019

503

02504

02

1-551

121-1019

12

121-1019

M

191~

1 0

551

Rl019

7

506

02 505

0250

02

019

-1
1-966-02

2737(2l

12 1

12

F1

9M
101

TZ966-03

200
2508,9
0

03

1

34

99-0

1-10
12

121-4

-01-G

34
TZl0

R499

03201

03202

1-1037

1-1059

121-973

12

12

9M

I TT973

105

TZ1037

3203

3206
0

0

03204

I\.)

Co)

I

REPLACEMENT DATA

PHILIPS

NEW·TONE

ZENITH

PART No.

121-975

121-1029

PART No.

WORKMAN

'IIEP736/123A

.
No

RCA

PART

SK3854/123AP

ECG

PART No.

ECG123AP

NTE

PART No.

NTE123AP

- 895

-Z9003
12 1

121-1040

P736/123A

WEP740B/165

WE

5/165
11

SK3854/123AP

SK3

CG165

E

ECG123AP

NTE123AP

NTE165

121-895

121

WEP62/159

WEP736/123A

SK3466/159

SK3854/123AP

59

1

CG123AP

E

ECG

59

1
NTE

NTE123AP

95
1-8

121-895

WEP736/123A

WEP736/123A

SK3854/123AP

SK3854/123AP

ECG123AP

ECG123AP

E123AP
NT

NTE123AP

121-1034

12

171

123A

2/

736/

WEP

WEP70

SK3201/171

SK3854/123AP

171
G

EC

ECG123AP

1

NTE17

NTE123AP

F-15684

121-975

36/123A

7
WEP

123AP

SK3854/

3AP
2

CG1

E

NTE123AP

rs.
to

rIbu

t
dIs

local
at

able

l

avaI

No,

MFGR.

PART

ING
RAT

1

9

862-0

7

22-7406

22-7708-0

22-

NP

5V

5V

2

.47 3

)
(1

)(2)
(1

01
35-

479

-13

22- 77

F

180V

0 180V

00

30

DESCRIPTION (Continued)

AND

PARTS LIST

Whe n ordering parts, state Model, Part Number, and Description

~

SEMICONDUCTORS (Select replacement for best results) (cont)

PART No.

GENERAL

ELECTRIC

MFGR.

PART No.

. No.
No

ITEM TYPE

GE-38

GE-123AP

GE-123AP

GE-123AP

-975

-1040
121

121

121-895

040

ITT975

1

TZl029-01

R895

03401

03208

03209

# Q3207

GE-123AP

GE-82

GE-123AP

121-895

121-895

ITT895

986M

R895

Q3404

03402

03403

GE-123AP

- 895
21

1

R895

03405

GE-27

F-15684(2)

121-1034

1034

TZl088

thru
01

05103

051

GE-123AP

sleeve.

part.

bead &

acement

l
rep

ferrite

valent

121-975

i

diode,

equ

l udes
inc

use on l y

I TT975

SAFETY

Assembly,

For

(1)

#

OX3202

~

sInk.
at

he

includes

Assembly,
(2)

No .

TEM

I

normally
are

listed

not

.

No,

MFGR

PART

numbers

Item

RATING

No.

ITEM

ELECTROL YTIC

CAPACITORS

C3429

CX3202 1 50V

#

-02

87-01

740 5

22-74

22-

t'P

NP

5V
2

50V

1

2.2

C1201

C1702

CX3240 17

CX3219 100

#

#

900

406-01

7

7
22-

22-

NP

t'P

100V

35V

4 22

402 1

25

C3

C3

CX3240A

#

t.
par

ent

eplacem

r

6

404-0

7
22-

qu1valent
e

nly
o

NP

use

16V

TY

----

FE

22

SA

- -

or

# F

C3410

y.

d CX3240A.
an

3240
CX

I udes

I udes Lead Assemb I

nc

nc

I

2)

(

( 1) I

PARTS LIST AND DESCRIPTION (Continued)

When ordering parts, state Model, Part Number, and Description

CAPACITORS

I

TEM
No

.

C1203
C1204
C1303
C

17

04
C1705
C1706

172

3

C
C2282
C2283
C23

55
C235

6

C23

59
C2376

23

77

C
C2386
C2389

# F

or SAFETY use only

68 NPO

20

N330 50V

47

N750 50V

18

NPO 5

18

NPO 50V

18

NPO

68 NPO

120

N150

22

NPO

51

NPO

33

NPO

I I

NPO

75

N470 50V

68

N470 50V

68

N470

36 NPO

RATING

50V

5%

0V

5%
5%

50V

5% 22-7743-18

50V

5%

50V

50V

5%

50V

5%

50V

5%

SOV

50V

50V

5% 22-7743-25

It-em

22-7633-29
22-7648-23

22-7743-18
22-7743-18

22-76121-30

5%

22-7633-35
22-7743-20
22-7621-27
22-7743-24
22-7621-11

5%
5% 22-7749-32
5%

equivalent

22-7747-33
22-7749-32

CONTROLS (All wattages

ITEM

NO

.

R1400
R1708
R1714
R1832

R1836
R2125

R2390
R2505
R2506
R2516

R2

517

R2527
R2528
R3409
R3

418

R3

441
R7101 Picture
R7

102
R7103 Color Level

R7104

R71

05

R7131 Brigh
RX3499A
RX3499

B Screen

FU

NCTION

Volume
Re

d C

utof

BI

ue

Black L

Reference

Black Leve l

Vert

APC
Red
Re

d Dr

Q-een Cutof

Green Drive

BI

ue

BI

ue Drl

95V Adj

Vert
Horlz

Bl

ack L

Tint
Sh

arpness/Switc

Focus

f

Cutoff

evel

Center

Adj

ust

Cut

of

f

ive

Cutoff

ve

ust

Height

Centering

evel

tness

Cutoff

I ng

f

h

RE

15K
5000
5000
2000

30K
500

10K

800

2500
800
2500
800
2500

lOOK
2000

100
5000
5000
Detent
5000

5000

5000
Detent
5000 63-10857-87
20M

4.5M

numbers

PART

replacement

Y2

SIS

TANCE

not-

MFGR

listed

.

No.

part.

are

normally

ITEM

No.

C3209A
C3210
C3233 .68
C3234
C3242
C3257
C3427
C3450
CX32

II
II
II
II

II
II
II

II

04
CX3205
CX3211
CX3223
CX3227
CX3229
CX3250
CX3258

watt, or less, unless listed)

MFGR.

PART

NO.

63-10772-04 (1)
63-10857-11

57

-31
or

(1

)

@

@

50%

50%

63-108
63-10857-86
63-10857-88
63-10857-15
63-09063-02
63-9023-2
63-10857-12
63-10857-27

63-10857-25
63-10857-26

63-10857-17
63-10857-08
63-10857
63-10750
63-10754

63-10751
63-10751
63-10766-01

(

2)

(2)

available

RATING

470

N1500 5%

82

N750

200V
470 N1500
100

N1500

470

N1500
150

N750
200

NPO

• I

100V

.01

2KV
530

N2200

.01

2KV
530

N2200
.0165
.0047

500V

• I

125VAC

10%

10%

50V

50V
5%

at

5%
5%
5%

5%

3KV
3KV

local dis

5%

10%
10%

NOTES

tributors.

MF

GR.

PART

22-7395

22-5995

22-7128

22-7395

22-5685

22-7395

22-7647-35

22-761 9-41

22-7773-24

23-

22-75

22-7672-08
22-7431-06
22-

01

5854

No.

3:

o

ON

mm

'z

N-

<-I

3:::I:

.....

Co)

CI1

II

For SAFETY

(I)

Number on unit.

(2)

Part

of Horizontal

use

only

equivalent
Output Transformer

replacement

TX3204,

part.

Part

No.

95-3603-01.

25

PARTS LIST AND DESCRIPTION (Continued)

When order ing parts, state Model, Part Numbe

r,

and

Description

RESISTORS (Power and Special)

ITEM

No.

RATING MFGR.

PART

REPLACEMENT DATA

No

.

NEW·TONE

PART

No

WORKMAN

.

PART No .

Rl

R2

R1706

#

R1772
R1776
RI779
R17

81
R1782
R1

784
R1785
R1789
R1791
R1799 100
R180

0

R1

801
R1803
R1834

#

R18

34A

#

R2

111
R2112
R2

121

/I

R2122

#

R2299
R2507
R2518
R2529
R3206

24

R32

#

R3225

/I

R32

28

/I

R3231

#

R3239
R32

40

R32

41

R3243

#

R32

44A

R3245

R32

61
R5101
R51

12

R5

113

RX

1457

/I

RX

2101

/I

RX2104

/I

RX2

105

/I

RX3204

/I

RX

3206

/I

RX

3207

/I

RX

3208

/I

RX3209

#

RX321

X3211

R

X3

213

R
RX32

14

X3

215

R
R

X321

RX3217

X321

R
R

X32

19

X3

235

R

X3

240

R
RX3246

0

6

8

#

#

#

#

/I

#

#

#

#

#

/I

#

5'11

5%
5%

1/2'11

1%
1%
1%

1%

'II'll

5'11

'II'll

Me

/4'11
1/4'11
1

/4'11

I'll Car

I'll

I'll

1/4'11

1/4

390
390
2 5%

698 1% 1

698 1%

698 1%

1100
1100
1100

698

27.4K 1%

51.1K 1% 1/ 4
1%

1

100
100 1%

100 1% 1

51
39
3000
10K

150 5% 1/ 2

150 5%
51

1500

1500

1500 2%
12 10% 10
4700

680 5%

680 5%
220

1
1 10% 3

.18
4
2200
47 10% 3'11
47
PTC

3~

2000 5%

2000

2000 5%

82

22

3 5% 1/ 2

3 5% 1

22

5600 5% 1

22 5%

2200 5%

1000

1100 5%

3000 1%

33K

2700

18K

1200

470 5%

2700 5%

4700 5% 1

1100 1% I

10M 10% 1

1.2M 10%

/4'11

1%

1/4'11
1/4'11

/4'11

5% 1/4

5% 1

/2'11

2%

1

2%

1/4'11
1/2'11

5% lOW

2%

1

2%

1/4'11
1/

5%

1

2'11 Metal

2'11

10%

1/2'11

10%

2'11

'11

10%

3'11

10% 10'11

5%

1/2'11

5%

3'11

11

Cold

10% 5'11

3'11

5%

3'11
3'11

5%

2'11 Metal

5%

1/2

',1

/2'11

00 5%

1/4'11

1/

2'11

1/4',1

5%

1/4'11
1/2'11

I'll

5%

1/4'11

2%

1/

5%

1/4'11

1%

1/2'11

1/

1/4'11

'11
/4'11

'11

WIll

/4'11

4'11

'11

/2'11

'II'll

'II'll
'II'll

'11',1
'11',1

Carbon

'11

Carbon Fi
Carbon Film

/2'11

4'11

2'11

/4'11

'll

/2'11
1

/2'11

tal

Oxi

de
Carbon Film
Carbon Film
Carbon Film

bon Fi lm
Carbon F ilm
Carbon Fi lm

Ca

rbon Fi

'11

Carb

on Film

'11

Carbon Fi

Carbon Fi
Carbon Fil
Carbon FIl m
Carbon FIl m

Carbon FI

lm

Carbon FIlm

Carbon FIlm
Carbon Fi
C

arbon
Ca

FIl m

r bon FIlm

Carbon Film

Car

bon Fil

Carbon Film

'II'll

Carbon

Film

Oxi

de 2

Carbon Film

'II

'll

Carbon Film

Film

'II'll
Carbon FIl m

Carbon Fi lm

Carbon Film

Oxi

Carbon Fi

de

lm

lm

Carbon Fi lm
Carbon

Carbon Film

Car bon Film
Carbon
Ca

Film

rbon

Carbon Film

C

arbo

n Fi lm

Carbon Fi

C

arbon Fil
Carbon Film

Carbon

Carb

on

Car

Carbon Fi

Film

bon Film

lm

Carbon

Carbon

lm

lm

lm

m

lm

m

m

lm

6

3-10

271

63-

10442-86A

63-1 0

271

63-

10442-86A

63-1

05

65-

6

3-10934-

63

-10934-

6

3-10934-

63-1

09

36-

63-

10

936-84

63-109

36-

63-109

34-

63

-10935-4

63

-10235-

6

3-10235-4

6

3-10235-4

63

-10235-4

07
97
97
97
84

84
97

8

48

8
8
8

(1)

(1

)

5'11139
5

'1113

HW200

HW051

HW039
63-1 0233-83
63-1 023
6
6

63-10
6
63- 10
63-10460-

3-

10565- 52

3-

10565-52

235-76

3-

102

235-76

3-96

35-

76
50

63-10243-88 H

QW230
QW3
HW11
HW1

QW
QW21
QW2

10

W2

'111

ll

(

(1)

2'11

H

W122

2'11

10'11309

'111

2'110

63-10836-68
63- 7757
63-10422-24
63-1 085 2 (
63-1 0852-01
63-08246
63-1024
63-10
63-1 0
63-1071
778413
63-1 0
63-10840-

63-1 0840­63-1 0
6

3-80 HW2
430-64
840-

40

0

(1)

444-

86 5
79

79

840-

79

3-10235-46

ll

63-1 0565-32 HW0
63-1 0243-11
6

3-10243-11 HW300

6

3-1023
3-7

5-80

816

6
63-10235-32
6

3-

102

35­63-1023
63­63-10
6

3-10236
63-10
63-1 02
63

-10

6

3-7
6

3-

80

5-72

778

7

81

8

-08

233-82

36-0

2

810-0

6

770 H

102

35-8

2

63-102 35-88

HW
QW222

H

W2

HW022
QW2
QW2

HW
QW333

QW22

QW3

W14
QW227
QW24

63-10810
6

3-10657-

63-1 0657

-0

04

3

9

10

5

15

215

5

15

'11

012

47
68

168

100

22

39

82

22

3DO

56
22

10

211

18

22-2062
22-2253

22-

2076

22-2076
22-2243

22-2243
22-22

43

22-21

12

22-4092
22-2080

WS1.

0

02

1

24-4

22-2104

FR605

22-40

70

22-2056

22-110

4

22-

2114

22-20

56
22-1 104
2

2-

1096

22

- 1132

7

126

22-1

7

22-2088
22-1106

7

22-11

12

22-217 0

26

# For

SAFETY

use only

equ

ivalent

replac

ement

part.

(

1) Number

on unit.

PARTS LIST AND DESCRIPTION (Continued)

When orderin g parts, state Model, Part Number, and Description

COILS (RF·IF)

ITE

No.

M

FUNCTION

MFGR

PART

.

No.

ITEM

N

o.

,

FUNCT

ION

MFGR.

PART

No.

Ll

L2
L1202
L

17
L1702
L1703
L2276
L2277
L2278
L2376
L2377

L23

L2

501

{I

For

01

78

W

idth

Wi

dth
RF
Peaking
Peak I
Peaki
Delay

Peakin

RF

Chroma Tak
RF
Peak I
RF

SAFETY

(120uH)

(120

Choke

ng
ng

Line
g

Choke
Choke

ng

Choke (6

use

only

uHl

eoff

63uH)

equivalent

2

0-4

031

20-40

31

28-390

7-

17

20-3887-16

20-3887- 16

20-3

887-1 6

20-4136

20-3907-21

20-39

19

45-3

080

20

-3887-20

20

-38

31

replacement

part.

COILS & TRANSFORMERS (Sweep Circuits)

IT

{I

{I

{I

{I
{I

No.

D

Y1

L340

2

L

X32

61

T320

1
T3205
TX3202

X3

204

T

TX3251

EM

Yoke
90·
S

we

Wi

dth
Start
Horlz
Re

gulat
Hor
Pi

ncushion

FU

Hor

lz

Vert 27mH

ep

Osc

I I I

Up
Driver

or

I z Outp

ut

NCTIO

1mH

ator

N

PAR

HE

-234­HE-23
20-40
20

- 3976

95

-3558-0 3

95

-3344

MF

4-4

26

95-3502-02
95-3603-01

95

-33

89-06

{I

II

{I
{I

(I

GR.

T No.

547

55

L3401
L5

102

L5

103

L5

104

L5105

L51

06
L5107
LX1201
LX1706
LX1785
L

X3262

TX3202A

or

RF

Cho

ke
RF
RF

RF
Pe
Pe

akin
aki

(663uH)
Choke (IOuH)
Choke (

10uH)

Choke ( 1 OuH)

g (8.2uH

ng (8.2uH)
Peaking (8.2uH)
RF

Choke

RF

Choke

RF

Choke

Horl z

LI

LI

REPLACEMENT

IDENTlFICA TION

near I ty

ne Choke

DATA

OTHER

20-3831
20-3907-12
20-3907-1 2

)

20-3907-11
2

0-

20-3907-

12

3907- 11

20-3907-11
20-3801-01
20

- 3975

95-3439

s::

o

THO

RDA

PART

RSON
No .

ON

mm

r""

Z

N-

<-I

s::

::I:

{I

For

SAFETY

FILTER CHOKE

{I

ITEM

LX3202

{I

No.

For

CU

RRE

(Measured)

600m

A

SAFETY

use

NT

use

only equiv

RATINGS

DC

RES.

2.

5

onl y

alent

replacement

INDUCTANCE

(0 CURRENT

1000~)

60mH

equivalent repl

part.

MFGR.

PAR

T No.

95-3501

-02

acement part.

REPLACEMENT DATA

THORDARSON

PAR

NOTES

T No.

27

PARTS LIST AND DESCRIPTION (Continued)

When

ordering parts, state

Model

, Part Number, and Description

SPEAKER

REPLACEMENT DATA

MFGR

. QUAM

PAR

T No.

SPI

IT

No.

EM

114" X 3

2

TYPE

1/2"

PM

32

Ohms

49-1332

FUSE DEVICES

TEM

I

NO

.

F

X3201

/I

II

For

SAFETY

ESCRIPTION

D

4A @ 250V
F

as

t-Act 1 ng

use

on

I y equ 1 va I e'

nt

13

6-113-23

rep

I acement

DEV

ICE

part

MFGR.

PART NO.

.

PART

No,

NOTES

NOTES

HOLDER

MISCELLANEOUS

ITEM

No.

CR71
ffi2356
E3251
E5101
E51

02

E5103

L3201

L3207

L3210

L3220

PI

S3201
SOOI
SW1701
SW7501

VI

LED

Crystal

Spark
Spark
Spark

Spark
Degauss I ng
Ferrite
Ferr I te
F
Power Cord
Switch

Switch
Switc

Switch

an

P.C.
P.C.

P.C.
P.C.

P
P.C.

P.C.

Power Cord

Power Cord

Socket

erri

.C.

PART

Gap

Gap

Gap
Gap

Bead
Bead

te

Bead

h

Board
Board
Board
Board

Board
Board

Board

NAME

Co

MFGR

PART

103-15201

.

No.

Power

3.58MHz

Indicator,

NOTES

Red

52-2240-08
52-2240-06
52-2240-06
52-2240-06

II

149-454

AC,

A-11847

Polarized

Power

ite/Green

85-1628

Wh
Composlte/RGB

63-10766-01
M33AAWOOX02

HE-234-547

(1)

or

No! se P

(P

rocessor

art

of Sharpness

Control R7105)

HE-234-455

AudIo/Video Sync

9-230-

5 (1)

Cont

rol

A-9522-05 (1)

204-840-03

zontal

Sweep

HV

/Hor i

9-247A (1)

MaI

9-227-

5A

(1)
204-1023-02
9-155-12

(1)
A-ll056
204-979-01

n
Video Output
VIdeo Ou

tput (A

Width

ssembly Includes

CRT

Socket)

A-l0530 (1)
50-347
125-198-07
78-2993-02

AC, Ass

AC,

CRT

Stra

embl y

In Rei i

ef

(1)

28

Number

on

unIt.

PARTS LIST

When ordering parts,

AND

state

DESCRIPTION (Continued)

Model, Part Number, and Description

CABINET & CABINET PARTS (When ordering specify model, chassis & color)

ITE

Top Cover
Bottom
P
Kn

P I a

erfora

ted

ob -On/ Of f

te

Botto

M

m Pl a

te

PART

14-11529-01
12-8215
12-8416

49-1332

No.

I

Knob-Volume

Kn

ob

Assembly-Volume

Knob RetaIning

TEM

SprIng-Volume

PART No.

46-10333
A-08846
80-02166

WIRING DATA

High Voltage Lead
Shie lded

General-use

Hook

........................

-up W

ire

Unshi e lded

••••••••••••••••••••

Hoo

k-up Wi

re

••••••

Use BEL
U

se BEL

Use BEL

DEN
DEN

DEN

No.

9867 (30

No.

8401
8208 (Two-Conductor)

No.

8529 (Sol id)
8522

KV)

or

8421 (Single-C

(Stranded)

Ava

i l

able

Avai l

onductor)

in

13

able

in

Colors

13 Col

ors

:s:::

o

ON

mm

I""'"Z

N-

<-4

:s::::I:

.....

c.:l

U1

29

N

_-

....J

,....

,....

(..)

---

~=

01

'

WIDTH BOARD

30

A

Howard

W. Sams

[.11-13111,-,.'31

Photo

R3240

s::

o

ON

mm

'-z

N-

<

....

s::X

.....

w

U'I

A Howard

W.

Saml

[!i'·lailiii·s31

Photo

TX3202

HORIZONTAL OUTPUT BOARD

31

=-=--E

.....-r-_

B 03204

C

HV/HORIZONTAL SWEEP BOARD

32

A Howard

W.

Saml

(tj1·14iiiili4i

Photo

VIDEO OUTPUT BOARD GridTrace LOCATION GUIDE

L5

C510

1 F- l 0

C5

102

C5

103 E- 8 L5103

C

51

04
C5105
C5

106

01

C51
C5102
C5103 G

A-9
K-5

A-7

-7

8

1

-3

E- 7

-3

101

L5102
L5104

L5105
L

510
L5107
05101
05102

J­D-2
D
D-3

6

J
C-5
D­J
A-4

-2

-2

-3

05103

4

R5101

R5102
R5104
R5105
R51

06

R5108

5

R511

0

R5111

C-6

H-l
J

-4
L- 7
C-l0
E

-4
E-5
D-3
C-9

R5112
R5113
R511
R5115
R511
R5120
R

51

21

R51

22

R51

23

R5

C- l
C-4

4
9

A-8
8-8
C- 8

-2

J

C-5

D­A-

6
8

124
R5125
5

A2

5C

2
5H3
5X3

K-7
8-8

A-I

-ll

D
G-2
F-2

I

A

B

C

D

E

F

G

H

1 2

3

4

5

.~

:(

•

6

•••

•

7

• •

8

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MAIN BOARD GridTrace LOCATION GUIDE

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C2103
C2104
C2

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C2106
C2107
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C3253
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C3409
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C34

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C34

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34

MAIN BOARD

35

AUDIOIVIDEO SYNC BOARD GridTrace LOCATION GUIDE

J-

Al
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01

C1

203
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C1

206
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R1463
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R1703
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R1718
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Rl728
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R1731
R1732
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R1739
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R1750
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R1757
R1758
R1759
R1760
R1761
R1762
R1763
R1764
R1765
R1766
R1767
R1768
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R1791
R1792
R1793
R1794
R1795
R1796
R1797
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R1808
R1810
R1811
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R1816
R1817
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R1820
R1821
R1822
R1823
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R1826
R1827
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R1832
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AUDIOIVIDEO SYNC BOARD

38

A

Howard

W. Sams

[Ii'·Ai,Il

·f.i3i Photo

AUDIOIVIDEO SYNC BOARD

11

TROUBLESHOOTING AID

NOTE: Waveforms taken

meter

, no signa

PICTURE

NO PIC,
(TX3204). Refer to "Troublesh

NO PIC, HAS
"Tr

NO PIC, HAS SOUND, HAS RASTE

HAS PIC, NO SOUN

LOW OR

SWEEP

NO RASTER, HAS SOUN
Refer

NO RASTER, NO

NO VE

POOR VERT LIN

POOR HORIZ LIN

OR

SOUND

NO

SOU

ND,

SOU

oub

leshooting"

EXCESSI

to

"Troublesho

SOUND:

RT

DEFLECTION: Refer to

OR

with

tri ggered scope, Keyed-Rain

l.

Controls adjusted for normal operation.

NO

RASTER: Check AC power supply and s

ooting

ND, NO RAST

Horizontal and Video

D:

Refer

VE

BRIGHTNES

oti

FOLDOV

OR

FOLDOVE

ER:

to "Troubleshooti

D:

Chec k HV rectifier (Part of Horizontal O

ng" Horizontal

Refer to "Troubl esho

ER:

R:

" P

ower

Supply and H

Che

ck

Horizonta l

cir

cuit s.

R: Refer

S:

"Trou

Refer

Refer to

to

Chec k Video and Luminance

cir

cuit.

bleshoo

to

"Troublesho

"Tr

Out

put Transformer (TX3204) sources and Video c

"Trou bleshoo ting" Video circuit.

ng" Audio ci rcuit.

oting" Horizonta

tin

g" Vertic

oti ng " Vertical

oubles

hooting

bow

generator. Schem atic voltages measur

our

orizontal circ

ces generated from Horizonta l

uits.

circui

ts. Refer to "Troubl

utput Transformer

l circuit.

al circuit.

circ

uit.

" Horizont

al

cir

cui t.

TX320

ed

with

Out

put

Trans

ircu

it. Refer

eshootin

4)

g" Vide o circuit.

and Horizontal ci rcuit.

digital

for

mer

to

RR

OW PICTURE: Refer to "Troublesh

NA

VERT OFF FREQUENCY: Refer to "Troublesh

HORIZ OFF FREQUENCY: Refer to "Troublesh

SYNC

NO VERT/HORIZ SYNC: Refer

RASTER

YELLOW (NO BLUE): Che

(NO RED):

CYAN

MA

GENTA (NO GREEN): Check Chroma and Green

COLOR (B/W operating normally)

NO COLOR: Refer

NO GREE

NO BLUE: Check Chroma and Blue Ou

NO

N: Che ck Chroma and Gre en

RED:

Check Chroma and Red Outpu t circuits, Refer

Check Chr

to "Troubleshooti

to

ck

Chroma and Blue Output

oma

"Trou

bleshootin

and Red

ng"

Out

tput

oot

Out

Chroma

put

circuits, Refer

ing"

Horizontal circui

ooting"

put circuits. Refer

Vert ical

ooti

ng" Horizontal circuit.

g"

Sync

circ

circuits. Refer

Output

circuits, Refer

circuit.

circ

uits

. Refer

to

to "Trouble

t.

circuit.

uit.

to

"Tro

to

"Tro

"Trouble

to

"Troubleshoo ting" R

uble

shoo

tin

to

"Troubles h

ublesh

ooti

ng" Raster

sho

oting" R

shooting" Ras

aster circuit.

ter

g" R

aste

ooting"

circ

aster

r circui

circuit.

uit.

circu it.

t.

Ras

ter

circuit.

40

TROUBLESHOOTING

POWER SUPPLY

Che

ck

the AC Fuse (FX3201). If Fuse FX3201 is open, che
for possible shorts
CR3234), Capacitors

Li

(L3201),
3S
for
tical

Apply 120VAC and
Diode CR3232
120VAC is mi
TX3202, Fuse FX3201, and Conn
120VAC is present , check f
tie poi nt) at pin 2 of Connec
re

check all the parts

If

26.9V at the
at the c
ing,
C3247 and Start Up Tr
s

horts
fro m the Hori
ti f ied by Diodes CR1701 , CR3235, CR3214, CR3208A and
CR3217. If
volta
the Vertical/Horizontal Pro c
are
Switch
shutd
section of the Service
sh

hooting

s

HORIZONTAL

To determine if the moni
voltage on the base of
(OX3202
monitor
to
vice

Check
Conn
Su

In

jec t a horizontal Signal at
put
the sweep
tical/ Horizontal Processor IC (IC3401 ). Check
waveforms and
16
(03209).
Di

odes CR3212, CR3211
(DY1),
(TX3204) and associated

sources developed
load

tified
CR3217. The high v
TX3204 and may be

Poor horizontal li
cond
and CX3227 and Diodes CR3211 B

ne

8.

Use th e " Resis

a shorted Hor i

Output Transistors

the mon

utdown

the

pply"

itor

athode

check

Diodes CR3219, CR3224 and CR3223, El

to

ground. Check the

the

ges and co

missing, check

Trans

own, refer

, refer

guide.

).

The voltage

is in

"High

Informati

for

160V (measured

ector

3V3. If the 160V is

sect

Tr

ansis

tor

oscillator

thru

21

If high

Connect

down

the h

by Diodes CR1701, CR3235, CR3214, CR3208A and

ition of Capacitors C3221 , CX3211 , CX3223, CX3229

at Bridge

C3251

Cho

ke Coil (TX3202) and C

tance

zontal Outpu

(0210 1 and 02102).

check

to

ssing

is

not

cathode

of Diode CR3223.

zont

al

sourc

mponents

istor

(OX3202) to

to

to

shutdown.

Voltage

on.

ion of this T

(03208

components

of I

C3401

voltage is

or

orizont

nearity

for

the

cathode

, check

the vol

the"

3R3, H

the

ment

ioned ab

operating
of

Diode CR3224 and check

ansformer

Output Transfo

e voltages are

associated

essor

tage

the "High Volt age

Inf

ormatio

Horizontal"

tor

the

sho

uld measure

If th e

Shutdown Defeat"

to

roubleshoo

).

If

the

circu

it at pins 23,

and

missing,

Band

orizontal Outpu

compo

fro

m Transf ormer TX3204

al circu it. Check the

olt

age

defect

ive.

or

Rectifier

thru C3253, Degaussing Coil

Measurem

120VAC from the

or

160V (measured

tor

deter

shut

monitor

common

missing

the

associ ated
the

rectifier

foldove

Diodes (CR3231

onnectors

ents

" chart to che

t Transi

stor

of Didoe CR3233. If the

Power

Switch

ecto

rs 3R8 and 3S8.

3V3.

If

the 160V is mi

ove.

when

turned On,

If

the voltages are

(T3201),

source

at the base of the sh

is in sh

base of .the Horizontal Out-

high vo ltage returns, check

Reverse Driver Tran sistor

nents.

check

voltages developed

rmer (TX3204) and rec-

not

regulated, check the

with pins

IC (IC3401

mine if the monitor is in

Shut

n.

If

the

monito

sec

tion

utdown, check

down

Switch

about 0.78V

is in

section

tie

point) at pin 2 of

, refer to

ting guide.

24

and

with

check

Transi s

CR3205,

an

Deflectio

Check

is part

r may be caused by the

d CR3212.

3R8 and

(03208)

).

of

shutdow

of Transformer

or

cathode

(S3201

), Coil

If

to

comm

ssing

check

for 12.

mis

ect

rolytic

for

possi

6 and 8

If al l v

olta
utdow

down Defea

r is not in

this

Trouble-

Transist

if

n, refer

of the Ser -

the"

Power

25

of the Ver-

volta

pins

3, 4, 5 and

tor

03208,

n Yoke

t Tran

sform

for shorted

that

could

sources

thr

Ver-

the

on

for

1V

ble

ges

the

the

ges,

rec-

is

off

If the horizo ntal sweep

osc illator

ck

the a

u

VERTICAL

ck

No vertical sweep.
pone
(02101 and 02102).
c

of

of

t"

or

er

ollector
CR2
and
the Vertical/ Horizont
e

ieflect

ponents

,

If the ver
waveforms and compo
021
sis
and check the Deflec

s-

Vertical linearity or
tical feedback and bias
C2105, C2106, C2131, C2152 and C3277,
for

"Resistanc e Measuremen
changes in feedback and bias

If the ver

n

ponen t s
and

IC34

VIDEO INPUT JACK

Connect a video color bar

Jack

nance IC (IC2376). If the waveform is miSSing, check

voltages, waveforms and

Video

012

C2251

If the waveform is presen t at pin 2 of IC2376,

forms

missing

so ciated

subs

If the
check f
Blue

waveform is miSSing

check

Transis

missing
and

(01745) and

the c
po

Trans

is
po

01711), Green

Am p Tra

circu

djust

nts

10

7,

associated

ion returns, ch eck voltages, wavefo rms and co

01,

tor (02103). Check Diodes CR2105, CR2106 and CR2107

mer (TX3251) and

check

01.

(P7)

Amp

03 and

.

at

titution

waveforms

Cutoff

voltages and

components associated

ollector

nents

isto

still

nents

it at pins 23,

ment of the Hori

Check

as s

ociated

of

Transist or

Pump-Up Transis

asso

cia

tica

l defl

02102

tica

l is o

assoc

the

and check for a waveform at pin 2 of ChromalLumi-

IC (IC1301), Vi deo A

01202

pins 19,

, check voltages, waveforms and

wit

h pi ns
.

or

waveform at

Tra

tor

(01744) and Transi

at

the collec

Transistor

asso

r 01704.

miss

associated with

nsist

with the

If

circu

it ry. In
al

ted wi th

ecti

on does not return, chec k voltages,

and 02104 and th e Retrace Detector Tra

tion

fo

ldover

ff

frequency

iated

with

frequency

), Delay Line (L2276) and

20

and

22

and

are pr esent at pins

nsistor

at the coll

componen

tor

of

Tran s

Amp

istor

with

If

the

check

Transis

ciated

ing,

ors (01707 and 01713).

frequency,

24

and

zont

al Oscilla

voltag es, waveforms and co

Vertical

the voltage is

02102

, check Diodes CR2106 and

tor

(02104

ject

a vertical

Processor IC (IC3401). If the ver

pins

1, 7 and 11 thru

nents associ

Yoke (D

Y1)

problems

cir

cuits.

Check

assoc

iated components. Use the

ts"

chart

circu

, check

pins

10,

of

21

the

s (01702 ,

of

01703. If the waveform is

waveform s a

12,23,24

the sweep

signal to

component

of

IC2376.

23

of

IC2376 and

colle

ctor

01703

ector

ts associated

stor

01702. If the waveform is

Tran

sistor

with

01704

, check voltages and com-

Blue Amp

voltages,

Red Amp

tor

s (01706 and

chec

25

of

IC3401 and check

tor

Output

low

or miSSing at

),

Electro

signa

ated

with Tran

.

can be caused by ver-

Electro

Pincus

to

check

itry r

esistance

the

voltages and com-

and

oscillator

the Video

s associated

mp Transistor

If

the

compone

check

19,

20

and

of

the

and 01704). If the

of Transi

01703, check

Green

Transistor

re

all present

waveforms

Transistors

k the sweep

Coil (L3

402)

.

m-

Transist ors

lytic C2103

l at pin

14

lyt

hi on Trans-

for

25

75

Electrolyt

check

waveforms are

21

Red, Green and

stor

with

Amp Transist

(01746) and

01712

the

14

tical

m-

of IC3401.

sistors

ics

C2103,

poss

ible

s.

of

IC3401

at pin

25

Ohm Inp

with

s (01204,

wav

nts as-

IC2376 by

of

IC2376,

01702,

Red Amp

voltages

missi

ng at

but

video

and com-

(01705 and

) and Blue

of

n-

of

ut

ic

e-

or

3:

o

ON

mm

'-z

N-

<-I

3::1:

......

(0)

C11

41

TROUBLESHOOTING (Continued)

VIDEO RGB BOARD

Connect a color

Input

RGB
waveform
form

at the base
waveform
or

all of these

voltages

Blue

01722) or
\'

:')1717,

signal

I f
01731,01732
and 9
forms
ponents
(IC1702) and

If
check
Amp
forms
ponents

01714), Green
A

No red,

the
compo
(05102), Red

01714)

No

If

components
(05103),

01715)

and

Driver (Standard)

01718

path used.

the

wavef orms are

of

the

are

the

waveforms

the

Transisto

are mi

associated

mp

Transistors

Check

waveform

nents

and White/Green

green . Che

the waveform

Green Amp

.

bar

Connector

at

the

base

at

the

base

waveforms

components

Red, Green ar:d

and

and

RGB Gain

missing, check

associated

Transistors

are

waveforms

rs (01714 ,

ssing,

Amp Transistors

(01710 and 0 1716).

for a

is

missing,

associated

Amp

ck

for

is

associated with Green Output

signal

from

(DB25). Use a

of

Red A

of

Green A

of

Slue

Transistors (01720, 0

01719) according

present

01733, check

Control

wit

h IC1701,

01731, 0 17

present

at

the

01715

check

with

waveform

Transistors

Switch (SW001),

a waveform at pin 6

missing,

Transistors (02508,

an RGB

mp

Trans ist

mp

Amp

Trans is

are

missi

assoc

iated w

Blue

Driver (Apple) Transistors

at the base

waveforms

IC (IC1701). If

voltages, wave

at

pins

emitter

and 0171 6

voltages, waveforms

Red

Amp

(01709

at pin 8

check

voltages,

with

Red

(02507,

check voltages,

gen

erat

or

to

scop

e and

or (01731),

Transistor

ng,

to input

Transistor

32

15,

of Red, Green and Blue

Tran

of

(01732) and

tor (017

check wa

ith Red, Green and

terminals

of

Transistors

at

these

forms

and

01733

16

and 17 of IC1701 ,

).

If

these

sistor (01708

and

01715)

the

CRT

waveforms

Output

025

02, 02501 and

of

the

CRT

waveforms

0 2504, 02503 and

check

wave-

33).

If any

veforms

1721

and

and

pins 15,

wave-

and

com

Array IC

.

wave-

and

com

and

and B

socket

Transistor

Socket.

Transistor

the
the

lue

. If

and

and

If

the

raster is

co

mpo

nents associa

(05101) and pin

the

raster

If
components
(05

102)

,

12

-

-

the

If
Yoke (DY1

If the raster has he i
tical", "Horizontal" or "Power
Troubleshooting

AUDIO

Inje

ct

for

sound

for 23,

at pin

shorted

ated

with

trol (R1400).

SYNC

No vertical
and 27
Che

ck voltages

25

thru

No

horizontal
ents

pon
Amp

No

verti cal sync.
ponents
Transitor

is cyan,

associated

and pin 8

raster has a

).

an

audio

from

7V

at pin

10

of

IC1451,

IC1451.

IC1451. A

or

horizontal

of

the

28

of IC3401 .

sync.

associated

Transis

tors

associated

s (03401 and

yellow,

check the voltages

ted

wit

h the Blue

11

of

the

CRT.

check

the

with

of

the

CRT.

keystone

ght

guide

signal

the

speaker

10

of

Audio

check

Check

lso

Vertical/Horizontal

and

components

Check

with pins 25, 26 and

(03403 and 03404).

Check

wit h

shape, check

or

width

.

at pin 2 of C

. No

IC (IC14

Resistor

voltages

check

the

sync.

voltages, waveforms

voltages, wav

pins

1 and

03402

).

, wav eforms

Output

voltages,

the

Red

Output

prob

lems,

Supply" sect

onnector

sound,

from speaker,

51)

. If 23.7V is

RX1

and

components

speaker and Volu me Con-

Check

waveforms

Processor

associated

28

of

waveforms

the

refer

ions

9E4 and

457 and

with

27

of

IC3401,

eforms

IC3401,

Trans i

Transistor

Deflection

to

the "Ver -

missing

check

at

IC (IC3401).

pins

and

and

Sync

and

stor

and

of

thi s

check

check

for

associ-

pins

1 and

com

Sync

com

Amp

1

-

-

No

blue.

Check

for a waveform
If the wav
components
(05101),

01716)

If
for
(01736), IC1702 and

RASTER

Check

If
components
(05103) and pin 6 of

the

ms

the

eform

Blue

and

White/Green

intensity
and comp

the

CRT and CRT

raster

associated

is

associated
Amp

of

onents

is

magenta,

42

at pin

missi

ng,

check voltages

with . Blue

Trans istors (025

Switch

color

is

incorrect, check

associated

associated

voltages

check

with

the Green

the

CRT.

11

09, 02506,

(SW00

with

circ

uitry

and

voltages,

of

the

CRT

, w

aveforms

Output

1).

voltages

Intensity

.

waveforms

waveforms

Output

Socket.

and

Transistor

025

05

and

, wave-

Transis

,

and

Transistor

tor

CHROMA

No

color

when a
monitor
voltages,
2

(I

ch
with Video
(01202,
Crystal
ponents

If there is no col
only color

thru

,4,
C2376). I f

waveforms

10,11,19,20,21,24

the

eck

voltages

Amp

01203

(CR2356) by

associated with

present, check

composite

the

Video

and

wavef

orm

, w

aveforms

IC (IC1301) and

and 01204)

checking the

or

when

video

signal

75

Ohm Input Jack

componen

and

is

pins

using

the

ts

26

of

ChromaiLuminance

incorrect

and components

Video Amp

Check

the 3.

24,

26

RGB

White/Green

is

applied

associated

at pi n 2

58MHz
waveforms
and

28

of

input

and green is
Switch

to

(P7). Che

with

of

IC2376,

associated

Transistors

Osc

ill

and

com

IC2376.

(SW001).

the

ck

pins

IC

ator

-

the

RESISTANCE MEASUREMENTS

IT

EM

PIN I

lel301

2702

ICI451

0 0

ICI701

INF

ICI71)

2

INF

IC2376 2000

Pli

l

IS
11K
llK 0

IC3401

PIN

IS

0

l:lF

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IT

EM E B

INF

QI202

INF

01203

475 3358 1

20

4

01

0 1793 400 QI730 8120 4346

~1701

9666 7790

01702

9564

~1703

01704 9615

8577

01705

86U7

017UO

~570

01707
01

70;

231a

2325 7590 6590

01709

232'; 7586 b590 01739

01710

1699 8577 6588

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VIDEO

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GRE

WHITE

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CABINET·REAR VIEW

SCREEN

FOCUS

DISASSEMBLY INSTRUCTIONS

CHASSIS REMOVAL

Remove
remove back f
scr
move
two
Audi olVid eo S
from

Remove
bo
Sweep Board an d li

Remove

lour

ews

from

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screws

screws

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Audio

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four

m chassis. Dis

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screws

holding

set. Lay set facedown and remove two

et b

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holdi

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Board

Sync Board and remov e board

holding HV/Hor

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board assembly from cabinet.

holding

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gui

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Main Board

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to

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wo

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sconn

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izontal Sweep Board to

to

cab inet

from

SERVICING IN THE FIELD

CRT IMPLOSION PROTECTION AND CLEANING

Imp

losion prot

cleaning

FUSE DEVICES

A

4-

amp fuse is used for AC

Chart.)

WIDTH

The wi dth may be varied by ad

1)

(LX326

ect

acc

. (See Placement Chart.)

ion is an i

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ntegr

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line prote

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part

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cti

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holding

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coil

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CRT REMOVAL

Follow "Chassis Remov
on a s
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tor

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ic

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ground

FOCUS

The focus ma y be varied by a
phot

CENTERING

Horizontal centering is
of

the horizontal

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Vertical centering is
the vertical centering
Chart.)

all cables from Main Board and

al" procedure

oft protect

3A and 2A3), speaker Co n

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ato r Connector

ve

four

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Connector

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TP7, 2A7 and 2B7). Remove

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Disconnect

(3T8),

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nector (4P4), front

to

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CRT to

CRT

from

focus

control

ished by

rol (R2125). (See

Disconnect

cabinet

chassis.

set.

control

by

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(R3

441

). (See Placement

proper

Main Board .

lift

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HV anode lead,

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best results)
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GENERAL

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TYPE

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Howard

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W.

Radio

Howard

Irademarks

af

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CIR

COMPUTERFACTS

.

BOO-42B-SAMS

telephone

Indiana 46206 U.S.A.

or

Indianapolis,

Representative,

Sams

Box 7092,

P.o.

your
see

Sams & Co., Inc.
W.

order,
To

Howard

4300 West 62nd Street,

SMU,.

ITT

CMTl

08932

use, informative technical
to

easy
put

COMPUTERFACTSTM

CMT7

S~NLS

along

:

saving
time

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valuable

many
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the

sample

just a
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in this exclusive Sams COMPUTERFACTS

informat

service information on

contained

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atures
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the
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guide

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containing

identification

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schematics

stage
and

notation

beginners

even

easy to use, step by step
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voltages

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standardized

section

waveforms,

hobbyist,

TM,

or

acceRted

Checks

industry

technician

Service

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