Zenith E1914W Diagram

~SMtS

~ For Supplier Addre.s See PHOTOFACT Index

..J

PHOTOFACT·

f2

~

(',I

r-

LU

en

---

:c

•...

~

J:~

~W

Z(/)

W..J

NW

C

o

:E

ZENITH

MODEL SE2017W

E1914W
E2014W
E3960W
E5220W

E5230W.
E5270S
SE1915W
SE2017W

SE3935W
SE5221W
SE5261W
SE5291H

SS8915W

:.

---.,:

"0 .•••

e

Alignment
lY 1

Convergence Adjustments . . . . . . . . . . . . . . ~

Disassembly Instructions . . . . . . . . . . . . . .. 1

GridTl1ICeLocatioo Guide

CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5

Main Board-Top View 4

Miscellaneous Adjustments . . . . . . . . . . . . . 6

Pans List

Infrared Detector!

Amplifier A·13326 8

Space Command Transmitter

124-128-01,124-128-03 8
lY 6,7
UHF/yHF Tuner 175-2298 7,8

Photos

Cabinet-Rear View .
Chassis-Botlom View

Shield Location . . . . . . . . . . . . . . . . . . . 6

Chassis-Top View ... . . . . . . . . . . . . . . . 5

CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5

CRT Neck Assembly . . . . . . . . . . . . . . .. 6

Infrared Detector!

Amplifier A-13326 8

Main Board-Bottcm View 4,5

I!

.a.1!

~ rM

The hstlng of any

constllule In anycasearecommendallon, warranly or guaranty lonal contenl. ,n any manner, " prOhibited No patent lIablllly "

by Howard W. Sam.&Co. as 10 lhe Quallly and sullablllty 01 a.sumed with respeCllo Ihe use olthe Inlormallon contaIned herein .

···,······

•uch replace";en! part. The n~mbers ollhe.e parts have been
compIled Irom ,nlormallon furnIShed to Howard W Sam.&Co
by the manufacturers ot the parlocular Iype 01replacemenl part
listed

Howard

2647 Wlterfrolt Plrtway, East

available replacement

W.

Sam.&Company

part herein does not Reproduction or use. without express permls~uon, 01

Photos

Main Board-Top View 3,4,5

Quick-Cbecks Trooblesbooling

CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5

Main Board-Top View 5

Safety Precautions .. . . . . . . . . . . . . . . . .. 1

Schematics

CRT Board . . . . . • . . . . . . . . . . . . . . . . . 2

Infrared Detector!

Amplifier A-13326 2

Selector/TUDerCartrol . . . . . . . . . . . . . . . 3

Space Command Transminer

124-128-01,124-128-03 2

Power Supply .. . . . . . . . . . . . . . . . . . . . 2

Terminal Guides and Notes 3
lY 2
UHFfVHF Tuner 175-2298 3

Servicing in the Field . . . . . . . . . . . . . . . .. I

Test Equipmenl . . . . . . . . . . . . . . . . . . . .. 1

Test-Jig Hookup 1

Trooblesbooting . . . . . . . . . . . . . . . . . . . .. I

Trooblesbooting Aid 1
Tuner Terminal Guide 8
Tuner Voltage Chart 8

DrIYI,

Sultl 300,

IlId1InapoIII, IlId1Ina

41214 U.S.A.

ed,tor,al

or pIC-

BLUE

REO

Remove nine screws holding cabinet back and remove back.
DiscOnnect HV anode, CRT socket, Deflection Yoke
connectors, Degaussingcoil connectors, Speaker connectors,
Ground leads, and all other required cabling. Release two
latches holding Remote Receiver assembly to cabinet front,
and remove Remote Receiver assembly. Remove five
screws (one in front, two with clips) holding main board
~mbly to cabinet and slide board assembly out of
cabinet.

Implosion protection is an integral part of the picture tube,
cleaning accomplished without CRT removal.

A 4-amp fuse is used for AC line protection. (See photo,
Cabinet - Rear View.)

Main

Boafd

must be removed.

Instruct ions.

(Caution: Some sets employ a CRT with neck assemblies
permanently bonded to CRT.

PO

NOT attempt to remove

these assemblies.)

Follow chassis removal procedure and lay set face down on
a soft protective surface. Loosen and remove CRT neck
assemblies. (See Caution). Remove four screws holding
CRT to cabinet front and lift CRT out of cabinet. DO NOT
LIFT CRT BY NECK.

Channel Up and Down bullons are provided for channel
scanning with ten numbered buttons (on remote transmiller)

provided for one or two digit entry direct access channel
selection. Fine tuning is automatic.

For High Voltage procedure, refer to Miscellaneous

Adjustments.

The focus may be varied by a Focus control. (See photo,
Cabinet- Rear View.)

See Miscellaneous Adjustments for Channel PretuDing
instruct ions. :

The RF AGC may be varied by an RF AGC Control. (See

photo, Main Board -Top View.)

Test Equipment listed by Manufacturer illustrates typical or equivalent equipment used by SAMS' EngIneers to obtain
measurements and is compatible with most types used by field service technicians.

Equipment

OSCILLOSCOPE
GENERATORS

RGB
MUL T1BURST SIGNAL

COLOR BAR
ANALOG VOM
DIGITAL VOM
FREQUENCY METER
HI-VOL TAGE PROBE

VOM/DMM
Accessory probes

ISOLA TION TRANSFORMER
CAPACITANCE ANALYZER
CRT ANALYZER
TEMPERATURE PROBE
AC LEAKAGE TESTER
LOGIC PROBE
LOGIC PULSER
INDUCTANCE ANALYZER
FLYBACK YOKE TESTER
TV STEREO GENERA TOR

TV STEREO POWER MONITOR
FIELD STRENGTH METER
TRANSISTOR TESTER
VIDEO ANALYZER

BIK Precision

Equipment No.

t541A. 2120. 2125. 2160 SC61

1249. 1260

1251.1260
1211A. 1249.1251.1260

114. 117. 177. 214

388HD. 2900 SERIES DVM37. DVM56A. SC61

1803. 1804. 1805 FC71. SC61

HV-44

PR-28(HV)
TR110. 1604. 1653. 1655

820.810. 830

467.470. 480. 490
TP·28. TP-30
1655
DP51. DP21

I DP101. DP31

875A LC7S. LC10l. LC102

[875A
12009

RG67
VA62A
VA62A. CG25. NT64

HP200
TP212

PR57
LC76. LC101. LC102
CR70

PR57

VA62A. LC76. LC10l. LC102
ST65. ST66
SR68
FS73. FS74
TF46
VA62A

Senc:or.

Equipment No.

Note.

-

Use an isolation transformer,or observe polarity, and maintain line voltage at 120VAC.
Al10w a 20 minute wann-up period for reciever and test equipment.
Suggested Alignment tools:

GC-THORSEN

.Alignment COILS: RECOMMENDED TOOLS:

Ll20l, Ll202, Ll205 None

Select highest unused channel. Set scope sweep to external or vector mode. Connect scope vertical input to scope vertical

input on sweep/marker generator. Connect scope external horizontal input to scope horizontal input on swee(¥marker
generator. Ground test equipmern to TV chassis unless specified otherwise. Use only enough generator output to provide
a useable indication. Sweep Generator frequency is 44MHz with lOMHz Sweep.

NOTE: Response may vary from that shown.
Connect a 6.5VDC bias to TP23 (Pin 23 IC2000).
Do not adjust Ll208.

DIRECT PROBE FROM

SWEEP GENERATOR

TPl208 TP2

SWEEP

GENERATOR GENERATOR

OUTPUT

MARKER

FREQUENCY

45.75MHz

REMARKS

Adjust Ll205 for maximum 45.75MHz marker.
Adjust Ll20l for proper symmetry and overall
shape of waveform.
See Figure 1

BAR SWEEP GENERATOR

SCOPE INPUT

REMARKS

To Antenna Terminals

Tune in a station and adjust L1402 for maximum sound. Reduce signal strength at the antenna terminals until distortion
appears. CODtinueto reduce the signal while aligning for undistorted outputbyadjusting L1402.

Connect as explained in preliminary instructions unless specified aherwise.
Connect DC Voltmeter to TP27. Adjust (R6727) for 6.4VDC. Remove meter. Connect a 6.0VDC bias to TP23.

DIRECT PROBE

FROM SWEEP

GENERATOR

TP42 TP2

SWEEP

GENERATOR

OUTPUT FREQUENCY

TP1208 Perform Video IF adjustment according to

Swee~Marker generator instructions.
See Figure 2

MARKER

GENERATOR

45.75MHz Adjust L1202 to place 45.75MHz marker to
maximum.
See Figure 3

REMARKS

•

A'104OO

2.

•

~

3M ~

1

•

DI401

'="-.

•

ClIHlI

.0047

•

lDI301

.1'

2V

C3402

.001

l000v

C3404

.001

l000V

•

•

CIalHII

I

lSOVA

1.

c:,.

•

CIIDt04

1G433

A

f[ff[f]llV

7001iA

15 111 111

s••

•

10434 1G435

C3431

.033

L341

43

l00V

10

1G424

1001:

r---'

PlItT",

I .TX3204

~8V

~.

I
I

I
I
I

I
I

I

I
I
I
I
I

RIB4

RIB4A

o

1

~1

RIB4A

.Rll347O • D3418

1200

2V :N

•

U34II 10467

CA3472

FOR TERMINAL GUIDES AND NOTES

SEE PAGE :3

PHOT.O CIRCUlTRACE •

SCHEllATIC CIRCUITRACE •

II

[ill

Z20

1100

3!llC

CR3432

•

Rll6804

-

[II[

A PHOTOFACT STANDARD NOTATION SCHEMATIC

WITH

H'·Billi·f."'

c:

Howard W. Same&Co 1190

POWER S~

!

------------------------------------------------m~

~ tb,

1 10

e

lllGUl

,.

2lI

•

CX343l1

l000Jlf

H2 1011 Ifl

C3233

,68T

2OOV·

SEE IC6700
TUNING
CONTROlLER
PIN 26
PAGE 3C,30

R3412

1000 .7V

113440 101C

1000

SEE 03400 1000

IlUTE

PAGE 2B,2C

Q6710RESET

4.

R3441

R3413

R6731

100

R6730

33lC

13

S.OV

C67Tl

lj1f

03403 S\lITCH

SEE IC6700 2l/
TltllN6
CONTROlLER
PIN 7
PAGE 3C

•

R)l32OO

43

CR3415

•

RX34I'1

3.

2O.0V

RIB4

2 2

L6601

•

16

RIB4A

R3262 R3263

Q32OORE6

56 56

S

6

6

12.0V
SOURCE

l1.SV(A)
SOURCE

".SVCB)
SOURCE

l1.SV
SOURCE

•

RX3201

C6625

10jlf

30
2W

6

11. SV(A)
1C6601 RE6

C2202

10""

C270S

4.7j1f

C6626

220""

C6630

.1~

2

~3V

RSl00

100

.wwl

BAS 1000

2000

10•..•

CSl01

.001'

(.0022')

RS109

22

RSl1S

RS121

1500

RS103

1SIC

17SV~)

'"

H

lS100

f11Tl

I I
I

~lV

1tS'l0l

2200

I

£S1 00 SPAAII:

!6AP

to..,.

SEE TlC3201

PAGE 2

X

~V

~.

,

~5V

RS102

100

8l~AS

2000

~5V

RS'IOl

100

GREEN B AS

~

2000

to..,.

CSl03

.001'

(.0022>

10,...

C5102 RS110

.001'

(.0022>

RSll'

150

RSl11

RS117

RS123

QSl01

• 'TV

RS116

RS122

22

1000

1500

22

1000

1500

RS10S

liRE£N

RSl01

LSl02

1SIC

1"

H

17SVW

0t1T lS101

1SIC

1"

H

17SVW

f11Tl

•

I

f11Tl

I ,

I ,

~2V

I

•

17SVCA>

CS101 R5127

.01T 110f(

1 leV .••

10.,.

H

DAS TO CRT

FSHIElO

FOR TERHIN,4L iUlOES AND NOTES
SEE PAGE'

PtlO'TO CIRCUlTRACE •

SCttEI1ATlC CIRCUlTRACE •

CABLING.
HEAVY LINES REDUCE

USE Of MULTIPLE LINES

A PHOTOFACT STANDARD NOTATION SCHEMATIC

WITH

O,,-IYilli·f.Gi

©

Howard W Sam.&Co 1990

II

[ill

041

fA

CRT BOARD

SET 2770 FOLDER 2

C10

470pF

R9

.0",,71

ISO

C8

C1

.068

C2

C3

10""

7

"1

A PHOTOFACT STANDARD NOTATION SCHEMATIC

©

Howard W Sams&Co 1990

IC1

TRAHSI1ITTER

X4

C5

.0",,71

Q2

121-1130A

.051

I

OUTPUT

II

TO

REI10TE

SUPPLY

C2

100""

81 '-

3V

-=-

TOTAL

-1

C4

lSOpF1

SPACE COMMAND TRANSMITIER

124-128-01, 124-128-03

lOEO PROCESSOR
V 4. V J.7V

4 J2 R1404

Cl405

.22~

:.0681

--

IDYl YOIC!:~

I
I
I

7500

--

~v

~.

~V

~.

TAICDl IIITH

IIAIt SlI!fP lIOEltATOR

----

a-

-

,

51'1 L2201

4P4

162 6.9

PRESET

R2203
(470)

: R2206

22: lOOlC

: C2211 R2221

: .01.?SOO

: CR2204

I
I
I
I

-:-_1

700

750

,

I

I

1 -----.

R2294

PICTURE

101C

T

QJ400HUTE

R3401

22IC

RJ402 ~22

22IC

22jIF

(ll2lO

i---------------

, 24

,

I

R229S

I

I

COLOR

,

I

I

: 1SIC

I
I
I

I

I
I

: PART OF Ml (NON-REPAIRABLE)

101C

SQ::

C0804

l00jIF

PART

1C2000IF/VIOEO PROCESSOR

R2297

SHARP-

NESS

101C 8200

~

4P4l1

OF

S.JV

1

i-----------------i

I ,

: R2298 23:

I

__ : lEVEL

12K BRI6HTNESS

BLACK

SOO

1R22991

RA$E

SOOO

27

~---------------------------------------------------------------

10

B.2V

R222J

J900

C2219

1

C2220

R22169•

4700

I---

0V

JS3RJSJ

• I

CX32&1 :

2

.33; :

I

i----- .•~

CJ2571 RJ2S8

.Dr

101C

,------+

I

m

122V

TERMINAL GUIDES AND NOTES
PAGE 3

rlOTO CIRClJITRACE ••

1ATlC CIRCUITRACE •

[ill

SEE POWER
SUPPLY

PAGE 2E

SEE CRT X

FILAI1EHTS

MGE 2tl

SEE POWER
SUPPLY
PAGE 2E

.R324IA

FOCUS

•

11M!

HV ANODE

21.OKV TO

22.SK"i

•

RX3217

AJ A4

" "

•

RX3233

ZZO

,-.,.".,.,.--.

I I
, I

•

RlC3214

1

1

·CX3219

."

1X

S

12.0V

R5124

RI B3 RI B3A (2200)

4?00

RIB3 RIB

2 2

R2216 9.0V

CIl2201 4700

i

R22t9 R2213

221J ]X

9

9

9.0V

CR2706

C2205

10pl'

R2212 C2214 1 • 1 39pF 2000

2.2" 1p1'

9

9.0V

L2301 C2303 R2304

14

17SVU)

C2304

.01.

rnn1'7ev

~.

11. SV(8)

~.v

TAaII 1I1T1l UII

MIP IUCAATQIt

6

10•.••

R2210 C2231

270

1 RIB3 RIB3A

C2209

270pF.

CR2207

3 3

4

R6704 R6703 C6704

3000 15K .001.

13

5.0V

SEE lC6700
TUNING CONTROLLER

PIN 12

PAg 3C

R2719

2000

r

RIB3

0 0

4

RIB3A

4

1

CI223

1I.2pf

*.2SpF

RI23ll

5100

C68OO)

r -
I

TAICDl III TIt lWt

~5V

~.

PAg 3C

ITPl208J

SEE Q6l101

VOLlH:

PART Of'

1C2000 I' /'VID(O NDCUSOII

1 7V

1 R'

Rl407 Cl40S

510

.22.

C • ...,

~

RI236

1000

RIm! CI224

39lC~ .01.

,

m

9.0V

R2114

VERT
SIZE

201:

R2118

1 SIC

CI8K)

14

17SV CB)

C1201

.01 .•

R2101

2700 10.2V

R2103

•

CX2111

47O-,F

• Rll2118

33K

2.4

C1219

.01 .•

C2108

.01

lOll

C2105

.22.•

:~

1

CX3261

I
I
I

:

[

3S3"cf

.'

.33.•

,

c~J.

.33T

'--

F

R2715

3300

C27071 R32SS
.0000T 1100

I

••

6

11.SVCA)

6

11. SV (A)

C3202
470pF

SOOV

lOX

FOR TERMINAL 6UH
SEE P"GE ,

PHOTO CIRCUITR,\

SCHEMATIC CIRCUITR}

n.SY

SEE IC6700

TUNING CONTROlLER

PIN 13

~

•

• 1230

11

9.0V

el227

.001. 58

1

5.1

RlC1211

C670S

.47";

RI238

1000

R12231 Cl224

39K~ .01.

I

m

9.0V

ffln73V

~.

•

RllS224

15

R2704 R270S CR2101

C27f12 C271S

~I1SOpf•.

R2714

100

PART Of

1C2000IF/vIDEO PROCESSOR

4.9V 4.6V OV

61 63 1

2200 430 SO

0012*

KHz

o

R2703

1000

C2708

4.1";

~V

LLLU..:i1

R2114

VERT

SIZE

20/(

R2118

15K

C18K)

R271S

3300

C27071 R325S

.0000T 1100

I

••

CABLING.
HEAVY LINES REDUCE
USE OF MULTIPLE LINES

A1 A2

ACT STANDARD NOTATION SCHEMATIC A -,---,------------------ _

WITH

Hi·Ailli,'·D-

© Howard W Sama

&

Co 19l1O

.--------------------------------.--------------------------_

: ~ ~ " ~ ~ $
: OMICf'f

:

I

•

,

I
I

•

,

,

I

,

,

,

I

-'- -'- -'- -'- -'- -'-

58

All

Qt.

-'-

510

IWI)

-'-

,10 16 lB 12 14

L__

R6715 1000 1000 1000

1000

R6721

Qt •

511

10Ft

CM.• VCI..• VCI...• All

-'-

---------- ---------

R6720

C"BllNG.

HE"VY LINES REDUCE
USE OF MULTIPLE LINES

--------_.

R6719

13 19 15

----------

R6718

1000

SEE TUNER
=LER J67~OO L6700 ~~~7
PAGE 3B

REtIOTE CONTROL

15 NOT USED
IN ALL 11ODEL5

SEE RE/1OTE
PREAMP
PIN 1

PAGE 26

SEE REI10TE

PREAW

PIN 2
PAGE 26

SEE REI10TE

PR£Nt>

PIN 3
PAGE 26

...

-----

...

Qt ••

59

ADO

-'-

-----------

R6716 R6717

1000 1000

R6'709

4700

C870B

IOpf.

llllB

~

1

~

12.0V

-------------

R6'744

3300

R6743

3300

I
I

•

--------_.

C

,

C8711

,001.

C8710

,001•

C8712

.001.

C8713

.001.

C6714

,001.

C8715

.001.

C8709

.001.

R6799

1500 CR6700

C8702

91pf.

L6701

SEE Q6710
RESET
PAGE 2F

SEE Q'Z702
VERT SYNC
PAGE 20

SEE 1C2000

IFIVIOEO
PROCfSSOR
PIN 42
PAg 2A

R67'37

91

R6'738

91

R6739

91

R6740

91

R6741

91

.Jl6735

91

C8701

2Opf .•

IC6700

"' ••••• CONTROllER

'Z7 4.8V

2tl 4.8V

.8V

19

21 4.9V

23 2.BV

8V

242•

25 4.9V

.BY

lB

g1.6V

10 1. 4Y

161.SV

B 5.0V

22

9V

74•

0V

6

12 .BV

.2V

1.7V 15

OV 4

OV

1. 6V 14

"R67OB

4700

SEE 03402

SVITQl

PAg 2f,iI'

13

5.0V

13

5.0VB4.9Y

5.0V 4.9Y

Q67ooVCl..lIE

13 B

R6713

2000

.

~

7

l1.SV

Q6704 LED SIIITCM

~.

4.6V (C67201

I~ .•

m

4.9V

A PHOTOfACT STANDARD NOTATION SCHEMATIC

WITH

ltIi'·Ailli·e.'3'

'" Howard W Sama • Co 1990

Q&7OOVOlllE

.

Q6701LEO SWITCH

8

1.9V

~

I1.SV

.0

R6605 Rli602 C6602 R6603

100 1. .01 _

R6600 C8601 C6&05 RS711

_ .047 •• 017. 100

15

31.0V

C6608

10pF

0S601 !iU'ER

SEE 1C2000
IFIVIDEO
PROCESSOR
PIN 30

PAGE 29

7

FOR TERMINAL GUIDES ANa NOTES
SEE PAGE 3

R6607 II.SV

1700

7

II.SV

7

IWCl

SWITCH 10pF

C&607

r

I1.SV

~

S.OV

SEE lUER

IH' TUoIIN$

VOlTA'f
PASE

P

SEE lUER
Vtf' Tlill N6
VOlTA'f
PASE 3A.3B

SEE TI.t€R
Vtf' 8+
+12V

PAGE

3A

SEE lUER

IH' 8+

+12V

PASE 38

SEE TUNER

SU'ER 8AND

SWITCH
PAg 3A.3B

SEE TUNER
Vtf' BAND
SWITCH
PAGE 3A

SEE TUNER

"

+12V

7 PAGE 3B

PRESCALER
13 pAGE 3D

SEE TUNER
8+ +SV

IXER

8+

PHOTO CIRCUITRACE •

SCHEtIATlC CIRCUlTRACE • [D]

81 B2 83 B1 as B6 B7 Be B9 810811 812813811 B15 816

lUll

a

81 813 B6 815 Be B9 B7 816 as 811 83 81281 810 B2 all

B

C7

I

c

A

F

II ~

Xl

1"

C3

8.¥

L2~

102 Cl0l ::

¥

.001

~

103 L101 ~

:r

t

rrn

m lJfPFl

~

---

-

lJ

Ll02~

Ll03~

C9

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TEST JIG HOOKUP

FUNCTION

CRT

YOKE

YOKE SEl1lNG

Check the AC Fuse (FX3401). If Fuse FX3401 is open,
check Bridge Rectifier Diodes (CRX3401 thru CRX3404),
Capacitors C3402. C3403, C3404 and C3405, Electrolytic
C3425. Apply 120V AC and check for 150V* at the
cathode of Diode CRX3403. If this voltage is missing,
check Line Filter (LX3401). If 150V* is presem, press the
Power Switch and check for 122V at TP3436. If 122V is
missing at TP3436, check the voltages and components
associated with the Voltage Regulator IC (lC3431), Driver

Transistor (Q3431) and the Horizontal Output Transistor
(QX320S). If the proper voltage is present at TP3436 refer
to the -Horizomal" section of this Troubleshooting guide.

Chek-A-Color

ADAPTER

B239

04141 PLUGI2AJ

FOCUS TAP

NO.

YPJ

P.C. BOARD

PLUG' 3S3

PINS 1,2

PINS 3,4

PIN 1 YELLOW

PIN 2 GREEN

If there is no video at TPI20S, apply AGC bias to pin 23
of the IF/Video Processor IC (lC2000). If video is now
present at TP120S, check the voltages, waveforms and
componems associated with pins 18 thru 27,29,37 thru 47
of IC2000, SWIF Driver Transistor (QI202) and the Video
Amp Transistor (Ql208). A defective AGC circuit can
cause an overloaded picture, excessive snow or loss of
audio and video. See the AGC Voltage Chart for AGC
voltages with signal.

BLUE

RED

AGC VOLTAGE CHART

IC2000
Pin 18 2.8V
Pin 23 5.7V
Pin 46 4.2V

Determine if TV is in shutdown, refer to the "High Voltage
Shutdown" section of this Troubleshooting guide. If TV is
not in shutdown, inject a horizontal signal at the base of the

Horizontal Output Transistor (QX3208). If horizontal
deflection is now present, check the voltages, waveforms
and componems associated with pins 60 thru 64 of the
IFfVideo Processor IC (lC2000), Horizontal Amp Tran-

sistors (Q3201, Q3202) and the Horizontal Driver Transistor

(Q3206). If there is still no horizontal sweep, check the
voltages, waveforms and componems associated with
(QX320S) and Transformer (TX3204). Check the voltages
and components associated with Diodes (CR3472, CR3473,
CR34S7) for defects. The high voltage rectifier is part of
Transformer TX3204 and if defective, will affect the
perf<X1D8OCeof the horizontal circuits. If the horizontal
oscillator is off frequency, check the voltages, waveforms

and components associated with pins 61, 62 and 63 of
IC2000. Horizontal linearity or foldover problems may be

caused by Capacitors CX322S and CX3229 being defective.

Inject a video IF signal at the IF input and check for video
on the CRT. If there is no video on the CRT, check for a
video waveform at TP1208. If video is present at TPl20S,
refer to the ·Video· section of this Troubleshooting guide.

Inject a video signal at TP1208 and check for video on the
CRT. If video is present, refer to the "IF-AGC" section of
this Troubleshooting guide. If there is no video on the
CRT, check for a video waveform at pin 53 of IC2000,
check the voltages, waveforms and components associated

with the Video Amp Transistor (QI203) and pin 53 of
IC2000. If video is present at pin 53, check for a video
waveform at TP5104. If the waveform is missing, check

the voltages, waveforms and components associated with

pins S, 13 thru 17,51,52,53 and Video Amp Transistor
Q5104. If the waveform is present at TP5104, check the
voltages, waveforms and components associated with the
Red, Blue and Green Output Transistors (Q5101, Q5102).
If the brightness is inadequate or cannot be controlled,
check the voltages, waveforms and components associated

with pins 14 and 15 of IC2000.

Check for a chroma waveform at pin 49 of the IF/Video

Processor IC (lC2000). If the waveform is missing, check
the components associated with pin 49. If a chroma
waveform is present at pin 49 of IC2000, check for the
proper waveforms at pins 9, 10, 11 of IC2000. If these
waveforms are missing, check the voltages, waveforms and
components associated with pins 2 thru 7, 9, 10, 11, 12 of
IC2000. Check the 3.5SMHz oscillator at pins 4 and 6 of

IC2000. Check the voltages and components associaled
with the color control and pin 3 of IC2000. If thcre is
inadequate tint range, check the voltages. wavefonns and
components associated with the tint control and pin 2 of
IC2000. If the proper wavefonns are present at pins 9,

10,11 of IC2000, refer to the wRaster" section of this

Troubleshooting guide.

Inject a vertical drive signal at pin 54 of the IF/Video

Processor IC (lC2000). If vertical deflection is now
present, check voltages, waveforms and components
associated with pins 54, 55, 56 of IC2000. If there is still

no vertical deflection. check the voltages, wavefonns and

components associated with the Vertical Output IC

(IC2101). Yerticallinearity or foldover problems may be

caused by vertical feedback and bias circuits, check Electro-

lytics C2101, C2102, CX2107, CX2111 and C2112 forde-

fects.

Select an active TV channel and check for an audio
waveform aI pin 28 of the IF/Yideo Processor IC (IC2000).
If there is no audio, check the voltages, wavefonns and
components associated with pins 28, 30 thru 36 of IC2000.
If audio is present at pin 28, check for audio at pin 4 of the
Audio Output IC (IC0810). If audio is missing, check the
voltages, wavefonns and components associaled with
IC0801. Check pin 30 of IC2000 for 1.2V at mute and

5.0V at Maximum volume.

(Q5100). If there is no green, check the voltages and
components associated with pin 10 of IC2000, and Green
Output Transistor (Q5101). If there is no blue, check the

voltages and components associated with pin 11of IC2000,

and Blue Output Transistor (Q5102). If the raster has a

keystone shape, check the Deflection Yoke (DYl). If the

raster has height or width problems, refer to the WYerticalw,

wHorizontalWand wPower"sectioos of this Troubleshooting

guide.

The high voltage is monitored by DiodeCR3206, rectifying

pulses from the Horizontal Output Transformer (TX3204).

Should the high voltage increase, the rectified voltage at the

base of the Shutdown Transistor (Q3299) will also increase

and trigger the shutdown circuit at pin 1 of IF/Video

Processor IC (lC2000). To troubleshoot, remove Diode

CR3206 from the circuit and use a variac for AC power.

Start at 90Y AC and increase as necC$U)' to locate the

defect. Return CR3206 to the circuit.

NOTE: Care should be taken in defeating the high voltage
shutdown circuit, as this may cause excessive X-radiation
and damage to the CRT, Transformer TX3204 and
associated components. Monitor the high voltage and
troubleshoot.

Voltages Taken with TV in Shutdown

IC2000

Pin 1 l.5V

TP3436 134V

If there is no vertical or horizontal sync, check the voltages,
wavefonns and components associated with pin 57 of the
IF/yideo Processor IC (lC2000). If there is no vertical
sync, check the voltages, waveforms and components
associated with pins 54, 55 and 57 of IC2000. If there is
no horizontal sync, check the voltages and components

associated with pins 57 and 64 of IC2000.

Check the CRT and CRT voltages. If there is no red, check
the voltages and components associated with pin 9 of the
IF/Yideo Processor IC (IC2000) and Red Output Transistor

Apply 120V AC, turn set On, set a1lcustomer controls for

normal operation and apply a 16.0V bias through an

isolation diode to the base of the Shutdown Transistor
(Q3299). If set docs not lose raster and sound the
shutdown circuit should be repaired To resume normal
operation, remove AC power and wait 30 seconds then turn
set On.

SEMICONDUCTORS (Select reolacement for best results)

ITEM

No.

CR2101
CR2101 103-279-12A
CR2201,2,3,4

CR2205,6. 7 ..
CR2208
CR2209
CR2301

CR2702
CR2703
CR2704
CR2705,6 103-398
CR3206
CR3257
CR3414,15
CR3421
CR3422,23
CR3431,32,33
CR3440
CR3466
CR3472 103-284A
CR3473
CR3487
CR6702,3
CR6711
CRX3200
CRX3207
CRX3401 THRU
CRX3404
CRX3434
CRX3435
CRX3436

IC0801
IC2000
IC2101
IC3431
IC3440
IC6600
IC6601

IC6700
Q1202
Q1203
Q1203

Q2101

Q2701

Q2701

Q3200 121-966-03

MFGR.

PART No.1

TYPE No.

103-254-01

103-398
103-429
103-142-01

103-330A
103-398
103-279-14A
103-398
103-279-10A

103-326A

103-254-01

103-3~18A

103-398

103-344A

103-254-01

103-399-29

103-326A

103-398

103-398

103-279-08A

103-409A

103-315-06A

221-422-01
221-467
221-468
223-28
221-213-4
221-419
221-166
221-493

121-1158A

121-895A

121-986A

121-975A

121-895A

121-986A

NTE ECG

PART No.

NTE116 ECG1l6

NTEI77

NTE116 ECGl16

NTES014A ECG5014A

NTESOI0A ECG5010A

NTES52 ECG552

NTE116 ECG116
NTES018A ECG5018A

NTE116
NTE116 ECG1l6

NTES52

NTES52

NTESOO8A
NTES021 A ECG5021A

NTE116 ECG116

NTE1374
NTE1790 ECGI790

NTE123AP ECG123AP
NTE159 ECG159
NTE123AP ECGl23AP
NTE123AP ECGl23AP
NTE159
NTE152 ECG152

PART No.

ECGI77

ECGl16

ECG552

ECG552

ECG5008A

ECG1374

ECG159

TCE

PART No.

SK3313/116

SK9091/177
SK3312

SK6A8/5014A

SK5Al/5010A

SK9000/552

SK3313/l16
SK9Al/5018A

SK3313/116
SK3313/116

SK9000/552

SK9000/552

SK4A3/5008A

SK12A/5021A II

SK3313/116

SK3853/l374

SK9850

SK3854/ 123AP

SK3466I159

SK3854/l23AP
SK3854/123AP
SK3466/159
SK3893/152

N4

II

II
II
II
II

PARTS LIST AND DESCRIPTION (Continued)

When ordering parts, slale Model, ParI Number, and Description

SEMICONDUCTORS (Select replacement for best results)

ITEM

No.

Q3201,2 121·97SA
Q3206
Q3299 121·973A
Q3400 121·97SA
Q3402
Q3403 121-1102A
Q3421
Q3440 121-1102A

QS100

llIRU

QSI02
QSI03
QSI04

Q66OO,l 121-1133A
Q6700,4.7 121-1133A
Q6710,l1
Q6801 121-11JOA
QX3208
QX3431

MFGR.

PART

TYPE

121-1037

121·1040-01A

121-966-03

121-1140A NTE399 ECG399

12l-1019A

121-89SA

121-11JOA

121-1141-O1
121-1040-01A

No.1

No.

NTE

PART

No.

NTE123AP ECGl23AP
NTEl71 ECGl71
NTE1S9 ECGlS9
NTE123AP ECGl23AP
NTE123AP ECGI 23AP
NTE290A
NTE1S2
NTE290A

NTE1S9 ECGlS9

NTEl23AP ECGl23AP

NTE2302 ECG2302
NTE123AP

KG

PART

No.

ECG290A
ECGlS2
ECG290A

ECGl23AP

TeE NOTES

PART

No.

SK38S4/ I23AP
SK320l/17I

SK3466ilS9

SK38S4/123AP
SK38S4/123AP

SK3114N290A

SK3893/1S2

SK3114N290A
SK93S2I399

SK3466ilS9

SK38S4/123AP

SK9422
SK38S4/123AP

1#

-

II

PARTS LIST AND DESCRIPTION (Continued)

·

ITEM

No.

CX0803

CX0806
CX2107
CX2111
CX2204
CX3204
CX3219

CX3405

RATING

470 25V 20% 22-7860-12
220 16V 20%

100 35V 20%

22-7859-10
22-7861-09

470 25V 20% 22-7860-12

330 25V 20% 22-7860-11

100 20V 35%

68 25V 20%

33 25V 20%
.004720%

22-7861-09
22-7860-27A

22-7860-C17A

22-7431-06

MFGR.

PART No.

ITEM

No.

CX3425
CX3436

CX3438
CX3439
CX3468
CX3470
CX3496
CX6724

RATING

470200V 20%
330 200V 20%

1000 25V 20%

4.7 35V 20%
4700 25V 20%

10 200V 20%
10 315V
470 10V 20%

MFGR.

PART No.

22-7819-10
22-7908-018
22-7860-13
22-8135A
22-7860-16
22-7962-11

22-7999-018
22-7858-12

ITEM MFGR

No.

C1223
C1226
CI403
CX2110
CX3206
CX3208
CX3216
CX3222
CX3228
CX3229

RATING PART No.

8.2pF 50V ±.5pF

22-7985-27

30pF NPO 50V 5% 22-8033-23

4.7pF 50Y ±.25pF 22-7985-19
.1550V 10% 22-8049-26A

--.012KY 20%
.1 50V 5%

.01 2KY 20%
530pF 3KY 10%
530pF 3KY 10%

22-7523-018
22-8048-24A
22-7523-018
22-8063
22-8063

.0056 1.6KY 3% 22-7672-40

ITEM

No.

RATING

CX3261 .33 250V 5%
CX3400 .004720%
CX3401
CX3405
CX3410
CX3411

.004720%
.004720%

-- .001 20%
470pF lKY 10% 22-7811-0IA
.001 lKY 10% 22-7811A
530pF 3KV 10% 22-8063

CX3412

.001 500Y 10%

CX3433 .0047 1.6KY 5%

MFGR

PART No.

22-7876-18
22-7431-06

22-7431-06
22-7431-06
22-7431-04 .

22-7786C
22-7672-16

Page7

PARTS LIST AND DESCRIPTION (Continued)

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

COILS (RF-IF)

ITEM

No.

L1201
L1202 AFC
L1203
L1205
L1206
L1207
L1208
L1209
L1210
L1402
L2203
L2301
L2303

FUNCTION PART No.

Peaking

RF Choke

Picture IF

Peaking (.38uH)
Peaking (.38uH) 20-3858-01
Output IF
RF Choke

RF Choke .(27uH)

Sound IF Detector

RF Choke (120uH)

Peaking (47uH) 20-3907-20A

RF Choke (5.6uH)

(8.2uH)

MFGR

20-4172-02A
20-4172-12A
20-3907-11A
20-4172-04A
20-3858-01

20-4172-04A
20-4216-01
2Q-4029A
20-4000A

20-42n-35A

20-3907-09A

ITEM MFGR

No. FUNCTION

L2304
L2701
LSl00

LSI01 22 Gauge Jumper

LSI02 22 Gauge Jumper

L6601
L6700

L6701
LX2202
LX3401

RF Choke (5.6uH)
Peaking

22 Gauge Jumper

Wire Peaking

Wire Peaking

Wire Peaking
RF Choke (l0uH)
Peaking (1CuH)
RF Choke (luH) 20-3907A
RF Choke (l CuH)
Line Filter

PART No.

20-3907-09A
20-4216-01

91-2053

91-2053

91-2053

20-3907-12A
20-3907-12A

20-3907-12A
95-3868-02

ITEM MFGR

No. FUNCTION PART No.

DYI

DYI

DYI

TX3204
TX3204
TX3205
TX3431 Chopper 95-3953-05

1#

For SAFETY use only equivalent part.
(2) Used in some 20" models.
(3) Used in 19- models.

Yoke 90· Horiz 2.94mH

Ven 20.2mH

Yoke 90· Hcriz 3.04mH

Ven 20.6mH

Yoke 90· Hcriz 2.2mH

Ven 33.5mH
Horizootal Output
Horizootal Output
Horizootal Driver

95-4023-05 (2)

95-4023-04 (2)

95-3705-05 (3)

95-4007-02 (2)
95-4007-01 (3)
95-4044

OTHER

IDENTIFICATION

NOTES

ITEM

No. DESCRIPTION

MFGR. PART No.

NOTES

CR2302
CR2701
CR6700

ESlOO

QuaJtzCrystaJ
Ceramic Resonator 224-80 503kHz
QuanzCrystaJ

Spark Gap
ESIOI Spark Gap
ESl'02

II

EX 340 1 Spark Gap

II

FX3401 Fuse 4 Amp@2S0V

II

KX3401 Power Relay
L2201

Spark Gap

Delay Line 2()'4298

Delay Line

L3200

Degaussing Coil

224-27

224-328
52-2240-06A
52-2240-06A
52-2240-06A

38-102
136-113-23

195-138

2()'4016
2()'3918-31

Degaussing Coil 2()'39 18-34

L3210
L3410
L3411
L3413
L3431
L3432
L3473
L3474
L3475
L3476
MI

Ferrite Bead
Ferrite Bead

Ferrite Bead

Ferrite Bead
Ferrite Bead

Ferrite Bead
Ferrite Bead
Ferrite Bead

Ferrite Bead

Ferrite Bead

Secondary Conlrol~

149-454
149-454
149-454
149-454
149-454
148-454
149-509-01
149-454
149-576-01
149-576-01

A-14544-03

Channel Display

LED Assembly

II

PI
SI

AC Cord

Switch

A-973 1-09

(I)
S2 Switch (1) Channel Up
S3 Switch (1)
S4
S5 Switch
S6
S7
S8
S9 Switch
SIO
Sl1

UI201 Ceramic Filler
U1202 Ceramic Filter
UI203 SAW IF Filter

II

VI CRT

Switch (1)

(1)

Switch
Switch
Switch

(I)
(I)
(1)
(1)

Switch
Switch

(1)
(I)
224-23
224-4
224-85
A5IACB02X

CRT A48ACB02X

3T8

3T8

Cable Assembly

Cable Assembly

A-9941-06 Part of Degaussing Coil 2()'3918-31.

A-9941-06

3.58MHz

4KVDC

Model E1914W, SEI9ISW, E3960W, SE3935W, SS89ISW.
Model E2014W. SE2017W, ES220W, ES230W, ES270S,

SES221W,SES261W,SES29IH.

Used on CRX3436.
Used on CRX3434.
Used on CRX3435.
Used on CRX3473.

3R8
On/Off

Channel Down
Volume Up
Volume Down
All Channel Up

Skip
All Channel Up
Add

Band
AFC

4.5MMHz Trap

4.5MHz
45MHz
Models E2014W, ES220W, ES230W. ES270S,

SE2017W. SES221W,SES261W, SES291H.

Models E1914W, E3960W, SE1915W, SE3935W,

SS8915W.

Models: EI914W,SEI915W,E3960W,SS8915W.

Part of Degaussing Coil 2()'-3918-34.

Models: ES220W, ES230W, ES270S, SES22IW,
SES261W. SES291H.

II For SAFETY use only equivalent replacement part.

UHrT

N;C

VHRS VHF'9+ VHrT

SBSW MIXB+ UHFB+

PRESB-t

-19.OV

VHF Low Band 1.5V

VHF' High Bond

UHF Band

NOTE: VHF Low Bond voltages token on chonnel 2.

VHF' High Bond voltage. taken on channel

UHF Bond voltage. taken on channel

10.2V

7.4V 8.0V

8.OV

8.OV

U
H

F'

T

11.5V

".5V

V V V

A

G

H H

C

B F
S

11.5'1

11.5'1

.9V

14.

S

H

B

F

S

T

8

+

W

1.5'1

-19.OV

10.2V -19.OV

7.4V

-19.0V

7.

M

I

I

F

X

B

+ +

11.5V

1'.5V

1'.5V

OV

OV 5.OV

11.3\1

5.OV

5.OV

3:

0

C

U

P

H

R

F

E

8

S
8

+

mN
.-m

Cf)~

m-t

~:c

..•

....•

~

INFRARED DETECTOR/AMPLIFIER A-13326

SET 2770 FOLDER 2