JVC AV-21E3 Service Manual

3

SERVICE MANUAL

COLOUR TELEVISION

AV-21E3

AV-21E

BASIC CHASSIS

CG

CONTENTS

! SPECIFICATIONS ････････････････････････････････
!

SAFETY PRECAUT IONS ････････････････････････････････

! FEATURES････････････････････････････････
! FUNCTIONS ････････････････････････････････
!

SPECIFIC SERVICE INSTRUCTIONS

! SERVICE ADJUSTMENTS ････････････････････････････････
!

PARTS LIST

★

OPERATING INSTRUCTIONS

★

STAND AR D CIRCUIT DIAGRAM

1

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COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

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31

2-1

6

No. 52028

Jul. 200 2

A

V-21E3

SPECIFICATIONS

ITEM

Dimensions(W×H×D) 497mm×454mm×478.5mm

Mass 21kg

TV RF System B/G, I, D/K,

Colour System

Picture Tube Visible size: 51cm measured diagonally

High Voltage 26. 5kV±1.5kV(at zero beam current)

Receiving Frequency VHF (VL) 46.25MHz～168.25MHz

Intermediate
Frequency

Colour Sub Carrier Frequency

RF Mode PAL / SECAM

VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43

VHF (VH) 175.25MHz～463.25MHz

UHF 471.25MHz～863.25MHz

CATV

VIF Carrier 38.0MHz

SIF Carrier

Cable TVs of Mid (X-Z, S1-S10)
Super (S11-S20) & Hy per (S21-S41) bands receiv able

32.5MHz(5.5MHz)

31.5MHz (6.5MHz)

32.0MHz (6.0MHz)
PAL (4.43MHz),

SECAM (4.40625MHz / 4.25MHz)
NTSC (3.58MHz / 4.43MHz)

CONTENT

Power Input Rated Voltage AC110～240V, 50 / 60Hz

Power Consumption 90W (Max) / 60W(Avg)

Speaker 5cm×9cm, Ov al type×1

Audio Output 3W (monaural)

Aerial Input Terminal 75Ω Unbalanced

Input Video 1V(p-p), 75Ω (Front / Rear)

Audio

Output Video 1V(p-p), 75Ω

Audio 500mV(rms) (-4dBs), Low im pedance,

Headphone jack 3.5mm mini jack

Remote Control Unit

500mV(rms) (-4dBs), High impedanc e,

RCA×2 (Front / Rear)

RM-C364GY
(Battery size : AA / R06 / UM-3×2)

Design and specifications are subject to change without notice.

2

No. 52028

A

SAFETY PRECAUTIONS

V-21E3

1. The d es i gn of th is pr od uc t c on ta ins sp ecial har d ware, ma ny
circuit s and components specially for saf ety purposes. For
con tinu ed pr ot ecti on , n o chan g es sh ou ld be ma de to the o ri g i nal
d esign un less a uth or i zed i n writin g by th e ma nu fact ur er .

Replacem ent p arts m ust b e i d entic al to thos e used in th e origin al
ci rcu it s. S er vi ce sho uld b e p er formed by qu alif i ed p ers on nel
on ly.

2. Alte r ation s of t he desig n or circui tr y of t he pr od ucts s h oul d not be
made. Any design alterations or additions will void the
manu fac t urer 's warra nt y and will f urth er r el i eve t he ma nufac tu rer
of r esp onsib ili ty for per s o na l inj ur y or p r op erty dam age r esul t in g
th erefr om.

3. Man y electrical an d m ec h ani c a l p ar ts i n th e pr od uc ts ha ve
special safety-related chara cteristics. T hese characteristics are
oft en no t e vi den t f rom vi sua l insp ection n or c a n t he pr o tect io n
aff orde d by th em nece ssar i l y be ob tai n ed b y u sing rep lacem ent
com po ne nts rated f or hig he r vo l tage, w att ag e, etc. Rep l acemen t
p arts whic h ha ve th ese sp ecial s afet y ch ar act er ist ics ar e

ide ntified in the parts list of S ervic e manua l. El ectric al

components having such features are ide ntified by shading
on the sche mat ic s and by (!!!! ) on the parts list in Service
manual. The us e of a sub stitu te r ep lacem en t which do es n ot

h ave th e sam e s af ety ch aract erist ics as t he r eco mm en de d
replac em ent par t sh ow n i n th e p ar ts list of Ser v i ce man ual may

cause shock, fire, or other hazards .

4. Don't shor t between the LIVE s ide ground and ISOLATED

(NE UTRAL) side ground or EARTH side ground when
repairing.

Some model's power circuit is partly different in the GND. The
diff erenc e of th e G ND i s sho wn b y th e LIVE : (") side GN D, the
ISO LATE D(N EUTR AL) : ( #) side G ND and EAR TH : ( $) side
GND. D o n't sh ort b et ween the LIV E sid e GND an d

ISO LATE D(N EUTR AL) si de GND or EAR TH side GN D an d
n ever mea sure w it h a m ea sur i ng a ppa r atus (oscilloscop e etc.)
th e LI VE sid e GN D an d IS OLA TED(NE UTR AL ) sid e G ND or
EARTH sid e GND at the s ame time.
If above not e will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended
th at t he B1 set ti ng s hou l d b e ch ec ke d or adj u s te d (Se e
ADJUSTM ENT OF B 1 POW E R SUPPLY).

6. The hi gh vol ta ge app li e d t o th e pi c tu re tu be must con form wit h
th at sp ec i fi ed in S er vic e m an ual . E xces siv e h i gh volt ag e ca n

cau se an i nc r e as e i n X- R ay em iss i on , arci ng an d possi b le
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
preve nt ed. If s ever e arc in g oc curs, r em ove t he AC pow er

immed iate l y and de ter m i ne th e cause b y visua l i nspect io n
(incor r ec t in stal lat i on, cr ac ke d or melte d hi gh vo lt age har ness ,
p oor so lder ing, et c.) . T o m ai nt ain the p r ope r min im u m l e v el of
sof t X-R ay em is sion, c ompon en ts i n th e high voltag e c ircui try
incl ud i ng t he pict ur e tu be must b e t he e x act r ep l aceme nts or

alte rn at ives ap pr ov e d b y th e ma nuf act ur er of th e c om pl et e
prod uct.

7. Do not c hec k high volt ag e by dr aw ing an arc. Use a hi gh volt age
meter or a hig h v oltag e prob e wi t h a V T VM . Di s cha rg e th e
picture tube before attempting meter connection, by connecting

a cl i p le ad to th e gr ou nd f rame a nd c onn ectin g th e oth er end of
the lead through a 10kΩ 2W resis to r to the anod e b utt on .

8. When se r vice is r equ ire d, ob serve th e or i gi na l lea d dr ess. E xtr a
prec aut i on sh ou ld b e g iven t o as sure correct lea d dr ess i n th e
high vol tag e cir cui t a rea. W her e a s hor t ci r c uit h as occu rre d,
th ose co mpon ent s tha t i ndi ca te evi de nc e of ove rhea ti ng sho ul d

b e r e pl ac e d. A l wa ys use th e ma nuf act ur er 's r ep l acemen t
components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

Af ter r e- ass emblin g th e p r oduct, al ways per f orm an i s ol at ion
ch eck on the expo sed metal p ar ts of t he c abin et ( a nte nn a

ter m i na ls, vid eo /audio i npu t and ou tput t ermin als, Con tr ol kn obs,
metal cabin et, scr ew he ad s, ea r ph one jack, c on trol shaf ts, etc.)
to be su re th e p r oduct is s af e t o o pe r ate with ou t d an ger of
elect ric al shoc k.

(1) Dielectric Strength Test

The iso lation be tween the A C pr ima ry c i rcu it an d al l me tal p ar ts
exp osed t o the us er, p ar ticular ly an y e xpos ed met al p art h aving a
retu rn p ath to t he chass is sho ul d withs tan d a volt age of 3 000 V
AC (r.m.s.) for a period of one sec ond.

(. . . . W it hstan d a vo lt ag e of 1 10 0V AC ( r .m. s.) t o an ap pl ianc e

rate d up to 12 0V , an d 3 00 0V AC ( r .m. s.) to an ap plian ce rat ed
200V or more, for a period of one second.)
This meth od of test r equi res a test equipment n ot g enerally fou nd
in t he serv ic e trad e.

(2) Leakage Current Check

Plug th e AC l in e c ord d ir ect ly in to the A C ou tlet ( do n ot us e a li n e
isol ati o n tr ansf or m er dur in g thi s ch eck.) . Usi n g a " Lea kag e

Current T este r", me as ur e th e lea kag e cu rre nt f rom each exp osed
metal p ar t of the ca bine t, p art icu larly any e xpos ed me tal p art
h aving a re turn path to the c h as sis , to a kn own go od ea rt h
grou nd (w a ter pip e, e tc.). An y l eaka ge c ur r en t must n ot e xceed

0.5mA AC (r.m.s.).
Howev e r, in tr op ic al area , th is mu st no t exce ed 0.2 mA AC
(r.m.s.).

"""" Alte rn at e Che ck M et hod

Plug th e AC l in e c ord d ir ect ly in to the A C ou tlet ( do n ot us e a li n e
isol ati o n tr an sfor m er dur i ng t hi s che ck .) . Use an AC vo ltmeter

h aving 1 00 0 oh ms pe r vol t or more sens it i vity i n th e fo llow ing
mann er . C on nec t a 1 50 0Ω 10W res ist or par a lle le d b y a 0 .1 5µF

AC-type c apa c it or bet ween an ex po s ed met al pa rt a nd a k no wn
g ood e ar th gr o und ( water pi pe , etc.) . M eas ur e th e A C vo lt ag e
acr oss th e res ist or with th e AC vo l tm eter. Move th e r es istor
con nec tion to e ac h expose d metal par t, p art icul ar l y a ny exp osed

metal p ar t havi n g a r etu rn pat h to the ch assi s, an d m easu r e th e
AC vol tag e ac ross the res ist or . No w , re v er se th e pl u g in th e AC
ou tl et and r e pe at eac h m ea s ur em en t. An y volt ag e me asu re d
must no t e xceed 0 .7 5V AC (r.m. s.) . This c orre sponds to 0.5mA
AC (r.m.s.).

Howeve r, in tropica l are a, this must n ot exce ed 0 .3V AC ( r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).

AC VOLT MET ER
(HAVING 1000 Ω /V,
OR MOR E SENSIT IVITY)

0.15μF AC-T YPE

PLACE THIS PROBE

1500 Ω 10W

GOOD EARTH GROUND

ON E A C H EX PO SE D
ME T AL PA RT

No.52028

3

A

V-21E3

FEATURES

"

New c h as sis d es i gn en ables us e of an i nt eracti ve on- scr ee n cont ro l.

"

Wide ran ge volt age (1 10V ～240V) AC power input.

" With AUD IO / VI DEO INPUT & OU TPUT te rmi nal.
"

MUT IN G button can red uce th e audi o level to zer o i nst ant ly.

" Func t ion al r em ote co ntrol t o opera te T V set (f or ch annel s e l ect, volume c ontrol, p ow er ON /OFF, etc . ) f rom a d ist anc e.
"

I2C bu s con tr ol ut i lizes singl e chip ICs for IF, V /C , D EF. V SM PRES ET, PR ESET & S ETUP TOU R.

" By m eans of AUTO PR OGRA M, the T V s tati o ns c an b e s electe d autom atica lly a nd the TV cha nn els c an al so b e rearr an ge d aut omatic al ly.
" Built-in ECO MO DE (ECONOM Y, ECOLOGY)

In acco rdanc e with th e br ig ht ness i n a r oo m, th e br ig ht ness and / of con tr ast of th e p icture can b e a djus t ed au tomat ic ally to m ake th e
op ti mu m pictu re which is eas y on th e e ye.

"

Built – in ON TIMER, RETURN + & CHILD LOCK.

SYSTEM BLOCK DIAGRAM

"

IC702

MEMORY

SCL2/SDA2

IC701

MICRO

COMPUTER

IC301

VIDEO/CHROMA

DECORDER

SCL1/SDA1

TU001

TUNER

4

No. 52028

A

FUNCTIONS

■

FRONT PANEL

10 9 1 2 3 4 5 6 7 8

MENU buttons

1

CHANNEL －/＋ buttons

2

VOLUME －/＋ bu tto ns

3

AI ECO se nsor

4

REMO TE CON TROL s ens or

5

6

ON TIMER lamp

PO W E R la mp

7

MAIN POWER button

8

9

A/V IN PUT t erminal

10

HEAD PHONE jack

V-21E3

■

REAR TERMINAL

1

■

■

REMOTE CONT RO L UN IT

1

2

3

4

5

6

7

8

9

ANT Terminal

1

2

3

4

5

10

11

12

13

14

15

16

2

VIDEO INPUT Term i nal

3

AUDIO INPUT T ermin al

4

AUDIO OUTPUT Terminal

5

VIDEO OUTPUT Terminal

ECO S ENSOR ke y

1

SOUND SYSTEM key

2

COLO UR SY STEM ke y

3

TV/V IDEO ke y

4

OFF TIMER key

5

CHAN NE L SCAN k ey

6

RETURN＋key

7

DISPLAY key

8

CHANNEL key

9

POWER key

10

PICTURE MODE key

11

Number (CH.) key

12

－/－－key

13

MUTING ke y

14

MENU ke y

15

MENU ▲/▼ key

MENU －/＋ key

VOL UME－/＋ key

16

No. 52028

5

A

V-21E3

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. U np lug the po we r plu g.

$.

$$

!!!!

an d a

2. As s h own in f i gur e , remove t he 5 screws marked

screw marked "

3. R em ov e th e b ack bo ar d an d re mo ve the p ow er c ord f rom th e

rear c over.

4. Withdr a w t he r ear co ver to wa rd you .

"and a s crew m arked ####.

""

REMOVING THE MAIN PW BOARD

" After removing the rear cover.

1. Slight l y raise t he bo th side s of th e M AIN PW Boa rd b y han d and
remove the PW B stop per of MAIN P W Bo ard .

2. Withdr a w t he M AIN PW Boa rd backw ar d.
(If nec ess ar y , take off the w ire cl am p, c onn ect or s etc. )

REMOVING THE SPEAKER

" After removing the rear cover.

1. As s h ow n i n figu r e, remove the 2 screws marke d $

CHECKIN G THE MAIN PW BOARD

1. To c h ec k the back s ide of the PW B oard.

1) Pu ll out the MA IN PW Boar d. (Ref er to RE MO VING THE M AIN
PW B oard)

2) Erec t th e PW Board vert ic al l y so th at you ca n easily check th e
b ack side of the PW B oard.

[CAUTION]

" W hen e re cting th e PW Boar d, be caref ul s o t hat there w ill b e n o

contacting with other PW Board.

" Before turning on power, make sure t hat the CRT earth wire and

oth er c o nne cto r ar e p rope rl y c onnect ed.

WIRE CLAMPIN G AND CABLE T Y ING

1. Be sure to cla mp the wire.

2. Never r em o ve th e c able tie used f or tyi ng the w i re s to gethe r.
Sh oul d i t be inad verte ntly remove d, be su re to ti e th e wi r es with a

new cable tie.

6

No. 52028

A

FRONT CABI.

V-21E3

CRT SOCKET

PWB

SP EAKER

MAIN PWB

HV T

D

(××××2)

REAR

COVER

PWB STOPE R

C

(×××× 1)

B

(××××1)

BACK BOARD

A

(×××× 5)

POWER

CORD

No. 52028

7

A

V-21E3

S

U

/C

COLOU

O

REPLACEMENT OF MEMORY ICs

1. MEMORY ICs

Thi s m od el u ses me mo r y I Cs. Thi s me mo r y IC da ta ar e f or pr o per opera tion of th e vide o and deflect ion circui ts .
When r ep la cing me m ory IC s, b e s u r e to us e ICs w r it ten wi th t he ini tial v a lu es of dat a.

2. PROCEDURE FOR REPLACIN G MEMORY ICs

(1) Power off

Switch the p ow er of f and di sco nnect t he pow e r pl u g from t he wall out let.

(2) Replace ICs

Be sure to use memory ICs written with the initial data values.

(3) Power on

Connect th e pow er pl u g int o the wal l ou tl et and s witch t he powe r on .

(4) C heck an d set SY STEM CO NSTANT SET

・・・・ It must not adjust without adjustment signals.

1) Press the DI SPLAY ke y and th e PICTURE MODE key of the REMOTE

CONTROL UNIT simultaneously.

2) The SERVICE MENU screen of Fig. 1 will be displayed.

3) W hil e the SE RV ICE MENU is displ ayed , ag ain press the DISPL AY key and

PICTURE MODE ke y si m ul ta neo usly, an d t he S YSTEM CONSTA NT SE T

screen of Fig. 2 will b e displa ye d.

4) C heck th e s ett in g valu es of th e SYS T EM C ON ST A NT SET of T able 1 If th e

valu e is diff er ent, se lect the s ettin g item with th e MENU ▼/▲key, and set

th e co rr ect valu e w ith t he MENU - / + k ey.

5) Press the DI SPLAY k e y tw i ce, and retu rn to th e n ormal sc r ee n.

(5) Receive channel of setting

Refe r to th e OPE R ATI NG INST RUCTIONS and set the r ece ive c ha nn els

(chan nels prese t) as desc r ibe d

(6) User Setting

Check t he us er s ettin g valu e of T ab l e 2, a nd if se tting value is dif feren t, set

th e co rr ect valu e.

For setting , r ef er to the OPE RATING INSTRUCTIO NS.

(7) Setting of SERVICE MENU

Ve rif y the set ti ng it ems of th e SE RVIC E M ENU, and reset w he re n ecess a r y.

For setting , r ef er to the SERVICE ADJUSTMENTS.

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

1.IF 2.V

3.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 SELECT DISP : EXIT

******

****** *****

************

SYSTEM CONSTA NT SET 1

: SELECT

- / + : OPERATE DISP : EX IT

SYSTEM CONSTA NT SET 2

: SEL - / + : OPE DISP : E XIT/

ERVICE MEN

***** **

* *.****

* * * *

****

********

** ***

** ***** ***

**********

*** ** **

*** ** ** ** ***

*** ** ***** ** **

Fig.1

SY STEM C ON STANT-

R : TRIPLE
BILINGUAL : NO
TUNE R : MU

ECO SENSOR : YES
LANG UAG E : E / R

/

SY STEM C ON STANT- ⅡⅡⅡⅡ

B/B SO UND : OFF
LOCK : 180

COL OUR AU TO : NO
QSS : MINT
ALC : NO

TEXT R ATE : 2 0

SY STEM C ON STANT- ⅢⅢⅢⅢ

ⅠⅠⅠⅠ

PICTURE

MO DE k e y

NUMBERS

SYSTEM CONSTA NT SET 3

AMP TUNER : N
VNR : YES
TEXT TABLE : CYL

VOLUM PWM : POS

key

: SEL - / + : OPE DI SP : EXIT/

DISPLAY

key

MENU

－/＋

key

8

MENU

▼/▲ key

No. 52028

Fig.2

A

SE TTING OF SY ST EM CONST ANT SET

Setting item Setting contents Setting value

V-21E3

COLOUR

BILINGUAL

TUNER

AI ECO S ENSOR

LA NG UA G E

B/B SOU ND

LO CK

COLOUR AUTO

QSS

ALC

TEXT RATE

AMP TUNER

VNR

TEXT TABLE

VOL UM PW M

MUL TI . PA LTRIPLE

YE S NO

MA

MU

YE S NO

E/R/A /P

ON OFF

YES 10 20 ～ 230 240 250

YE S NO

MI NT MQ SS

YE S NO

10 20 40 80

YE S NO

YE S NO

ARA CYL

POS

E/R

NEG

Table 1

TRIPLE

NO

MU

YE S

E / R

OFF

18 0

NO

MI NT

NO

20

NO

YE S

CYL

POS

USER SE TTING V ALU ES

Setting item Setting value Setting ite m Setting value

SUB POWER ON LANGUAGE ENGLISH

CHA NNEL PO SITIO N 1 PO SITIO N CHA NNEL PRESET Refe r t o OPE RATIN G I NS T RUCTION

VOL UME About 10 AI ECO S EN SOR OFF

TV/V IDEO

ON SCR EEN DI SPLAY

COLOUR SYSTEM PAL ON TIMER PR1 0:00

SOUND SYSTEM B / G BLUE BACK OFF

OFF TIMER OFF OSD.Shows 00 CHI LD LO CK OFF

PICTURE MODE (VSM) BRIGHT SETUP TOUR ON

TV VNR OFF

POSITION IND ICATIO N AUTO SHUTOFF OFF

Table 2

No. 52028

9

A

V-21E3

INITIAL SETTING VALUE OF SERVICE MENU

1. Ad just ment of the SE RVIC E M EN U is made on the bas is of th e in itial s et ting va lu es ; howev er, t he new se ttin g va lu es w hich
set the screen in its optim um condition may differ from the initial setting.

2. Do no t c hange the initial Setting Values of the Setting (Adjustment) items not listed In “ADJUSTMENT”.

2. V/C

Colour system

Setting item

RED

GREE N1. CUT OFF

BL UE

2. DRI VE

3. BR I G HT -127～+127 + 0

4. CONT . -63～+6 3 + 0

RED

BL UE

Variabl e

range

-128 ～+127

-128～+127 + 0

PA L SE CAM NT SC 3.5 8 NT SC 4.4 3

-50

Initial setting value

5. COLOUR

6. TIN T

7. SECAM BL ADJ.

8. SHARP

3. DEFLECTION

1. VER. POS ITION -04 ～ +03 - 1 - 3

2. HOR. POSITION -16 ～ +15 + 3 + 3

3. VER. HEIGHT -64 ～ +63 -35 + 1

4. VE R . L I NE AR I T Y -32 ～ +31 +15 - 1

5. VER. S CURV E -32 ～ +31 -32 + 0

6. H O R. VC O AD J UST

4.VS M PRESE T

mode

VS M

Setting item

TINT SETTING VA LUE +15

COLOUR SE TTIN G VA LUE +15

(Do Not Adj. )

Setting item Variable range

TV

VI DEO

TV - 8(Fixed)

VI DEO

(Do Not Adj. )

VS M pr eset

-63～+6 3

-63～+6 3

-31～+3 1 + 0

-32～+3 1

-63 ～ +62 + 0 + 0

BRIGHT STANDARD SOFT

+ 0

+ 0 + 0

+ 0 + 0

+15(Fixed)

Initial setting value

fv : 50Hz MODE fv : 60Hz MODE

BR IG HT SET TING VA LUE +15

CONT . SE TTING VA LUE +30 +15 + 11

SHARP SE TTIN G VA LU E +15 +1 2

10

No. 52028

A

5. PRESE T

The items in the fol lowing table, it is no requirement for adjustment.

If va lues had chang ed by the miss operation, se t the init ial setting value s i n the f ollo wing table.

Colour Syst em Do No t Adju st

V-21E3

Setting item

1. C TRAP FIX 1 1 1 1

2. SHARP PEAK 0 0 0 0

3. A BL 1 1 1 1

4. GAMMA 0 0 0 0

TV 0 2 2 3

5. Y. DELAY TIME

VI DEO 0 2 0 2

6. BL ACK EX P STAR T

TV 1 1 0 0

7. C-BPF

VI DEO 1 1 1 1

8. CW / SC P 0 0 0 0

9. VIF DET LEVEL 0 0 0 0

11. IF AGC MIN 0 0 0 0

12 . VIF AGC 0 0 0 0

13. VIF PMOD 0 0 0 0

19 . VN R 15 15 15 15

PA L SE C AM NT SC 3.5 8 NT SC 4.4 3

＋3 ＋3 ＋3 ＋3

Initial setting value (Fix ed v alue)

20 . R GB LIM 1 1 1 1

21. RGB LIMIT LEVEL 2 2 2 2

23. TEXT H. POSITION -3 -3 -3 -3

24. READ DATA

Sound System D o Not Ad ju s t

Setting item B/G I D/K M

10. SIF DET LEVEL ＋0 ＋0 ＋0 ＋0

14. SIF BPF BW ADJUST

15. SIF TRAP FO ADJUST ＋0 ＋0 ＋0 ＋0

16. SIF TRAP FO ADJUST 2 ＋0 ＋0 ＋0 ＋0

17. SIF -TRAP 0 0 0 0

18. SIF -BPF 1 0 0 0

22 . SIF SW 0 1 1 1

＋

0

＋

0

＋

0

＋

0

No. 52028

11

A

V-21E3

REPLACEMENT OF IC301 (IF V/C DECODER)

" For the I C301(I F V/C DEC ODER ) of this mode l, all data are writ ten in the micro-computer. So, wri te the data in the micro-

computer in accordance with the following procedures before starting adjustment.

PROCEDURES

(1) T ur n t he POW E R O FF.
(2) R epl ace t he IC30 1 with a n ew o ne .

(3) W hile pr essing ME NU bu tto n a nd VO L+ bu tto n ON the F RO NT C ABINE T simul t ane ous l y, t urn th e POW ER ON. Wh en th e POW ER i s

turn ed ON, th e d at a is wr itten i n t he micro-co mputer imm ediately.

LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS

MENU buttons

MENU buttons

1

1 2345678

CHANNEL ･ / ･ butto ns

CHANNEL －/＋buttons

2

(ME NU ･ / ･ bu tt ons)

(ME NU －/＋b uttons)

VOLUME －/＋ buttons

VOLUME －/＋ buttons

3

(MENU －/＋ bu tto ns)

(MENU －/＋ bu tto ns)

AI ECO sensor

AI ECO sensor

4

REMOTE CONTROL sensor

REMOTE CONTROL sensor

5

ON TIMER lamp

ON TIMER lamp

6

POWER lamp

POWER lamp

7

MAIN POW ER button

MAIN POW ER button

8

12

No. 52028

A

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1. Ther e ar e 2 w ay o f adjus ti ng t hi s T V: One i s wi th t he
REMOTE CONTROL UNI T and the other is the conventional

method using adjustment parts and components.

2. The adjustment with the REMOTE CONTROL UNIT is made
on the basis of t he initial settin g v alue s. The setting va lues

which adjust the screen to its optimum condition may differ
from the init ia l s etting v al ues.

3. M ake s ure th at conn ect ion is c orr ect l y made t o AC p ower
source.

4. Turn on the p ower of th e se t an d eq uipm en t bef ore use, an d
start t he ad ju stm en t proc edures af ter waitin g at least 30 mi n ute s.

5. U nl ess ot her w ise s pec if i ed, p r ep ar e th e mo st suita bl e r ec epti o n
or inp ut sign al for adjust ment.

6. Nev er t ouch a ny ad ju s tme nt part s, whi ch ar e no t spe cif ied
in t he li st for thi s adju st me nt VR s , t ra nsforms, conde n ser s,

etc.

7. Pr ep ar atio n for ad j ustm en t
Unless otherwise specified in the adjustment instructions, preset

the following functions with the REMOTE CONTROL UNIT.

User mode position

PICTURE MODE (VSM) BRIGHT

VNR OFF

TINT / COLOUR / BRIG HT
CONT. / SHARP

BLUE BA CK OFF

OFF TIMER OFF

AI ECO S ENSOR OFF

AUTO S HUT OFF OFF

V-21E3

CENTER

MEASURING INSTRUMENT AND FIXTURES

1. DC voltmeter (or digital voltmeter)

2. Oscilloscope

3. Si gn al g en er ator (P attern g en erat or) [ PAL / S ECAM / N T S C]

4. Remote control unit

ADJUSTMENT ITEMS

Adjustment item Ad justment item

B1 POW E R SUPPL Y

FOCUS adjustment VSM PRESET setting

IF ci rc uit a djust ment

V/C (Video / Chroma) circuit adjustment

DEFLECTION c ircuit adjustment

PURITY/ CO NV ER GENCE adjus tm ent

No. 52028

13

A

V-21E3

3

BASIC OPERATION OF SERVICE MENU

"

The adjustment using SERVICE MENU

The f ol l ow i ng adj us tme nt it ems u s e t he SE RV ICE MENU in th e s er ies of the adju stment . The ad ju stm ent s ar e m ade on the bas is of the
initial se tting valu es. Th e adju stm ent valu es whic h adju st t he scr een to the o pti m um c o ndi t ion c an be di ffere nt from th e in iti a l sett in g values.

With th e SERVIC E ME NU, vari ous s ett in gs c an be made , a nd the y are br oa dl y cl as sifie d i n the f ollo win g ite ms of s etti n gs .

1.I F ･･･････ ･････････････ ･･･ Adjustment of the IF circuits.

2.V /C ･･････････････････････ Ad ju stm en t of th e VIDEO /CH RO MA cir cuit.

3.DEF ･･･････ ･････････････ ･ Ad justment of th e DEFL ECT ION circ uit.

4.V SM PRES ET ･･･････ ･････ Ad ju stm en t of th e i ni t ia l sett in g value s of VSM co ndit i on as STA NDA RD, SOFT a nd BR IGHT.

(VSM : Video Status Memory)

5.PRESET

6. SETUP TOUR OFF ･･･････ It s hou l d be abl e to sel ect m ode (LAN GU AG E and AU T O CH PRESE T )..

"

Key operation of the SERVICE MENU

[Enter to SERVICE MENU]

Press the DI SPLAY key and the PICTURE MODE key of the REMOTE CONTROL

UNIT s i mu lt an eously. Th en ent er th e S ERVIC E MEN U mod e as sh ow n in F i g.1 .

[Exit from SERVICE MENU]

When complete th e ad j us t ment wor k, press th e DISPLA Y key to retur n t o th e

SERVICE MENU.
An d th en pr ess th e DISPLA Y ke y ag ain, retur n to th e n orm al sc r een .

[ Se lec t fr o m SE RVIC E M ENU]

In SERVI CE M ENU , press t he n umber ( 1 ～6) k e y of the remo te c ont ro l un it , to se l ect

an y of th e adj us tm en t items.

The colour s whi c h selecte d i te m ch ar act ers are ch anged .

･･･････ ･･････････

Adjustment of the RF circ uit [Do not adjust].

[Should be OFF].

SE RVICE MEN U

1.IF 2.V/C
.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 SELECT DISP : EXIT

******

***********

***** **

************

**********

*** ** **

*** ** **** ***

*** ** ***** ** **

**.***

****

** ***

** ***** ***

***

******

Fig.1

14

DI SPL A Y ke y

－/＋key

No. 52028

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

MENU

PICTURE

MO DE k e y

NUMBERS

key

MENU

key

▼/▲

A

[Method of setting]

1. IF

[1. VCO]

① 1 K ey ･･･････ ･････････････ ･････ Select 1.IF.
② 1 K ey ･･･････ ･････････････ ･････ Select 1.VCO
③ The VCO (CW) screen will be displayed a allow mark when the AFC voltage is at a certain level.
④ DISPLA Y K ey･･････････････････ As you press this key twice, you will return to the SERVICE M E NU.

[2. DELA Y P OINT]

① 1 K ey･･･････ ･････････････ ･････ Select 1.IF.
② 2 K ey･･･････ ･････････････ ･････ Se lect 2 .D ELAY P OINT.
③ ME NU -/+ K ey ･･･････ ･･････････ Se t (adjust) th e se tting valu es of th e s etting ite ms.
④ DISPLAY K ey･･････････････････ W hen this is pr esse d twi ce, you w i ll ret ur n to t he SE RVICE MENU .

2.V /C, 3.D EF an d 4.V SM PRES ET

① 2~4Key ･･･････ ･････････････ ･･･ Select one from 2. V/C , 3. DEF an d 4. VSM PRE SET.
② MENU ▼/▲ Key ･･･････ ･･･････ Se lect s etting i tems.
③ MENU -/+ Key ･･･････ ･･････････ Adj u s t th e va lues of t he items.
④ DISPLA Y K ey ･･･････ ･･･････････ W hen th is is presse d, re turn t o t he SE RVICE MENU .

V-21E3

6.SE TUP T OUR

① By p r essi ng the 6 key, you can ch ange t he ON or OF F ( should be OFF).

(Should be OFF)

%･

The JVC’s logo will be shown about 15 s econds automatically.

② MENU -/+ Key ･･･････ ･･････････ Select Language.
③ MENU ▼ Key･･･････ ･･････････ Au to Se arch.

If it is ON , th en y ou tu rn th e TV po we r off , wh en y ou ar e tur n the TV p ow er o n aga in .

No. 52028

15

A

V-21E3

S

U

6.SETU

JUS

6.SETU

ON /

50

(R)

50

O

SERVICE MENU FLOW CHAR T

SE RVICE MEN U

ERVICE MEN

1.IF 2.V/C

3.DEF 4.VSM PRESET

5.PRESET
P TOUR OFF

1-6 SELECT DISP : EXIT

******

***********

***** **

* *.****

************

**********

*** ** **

*** ** **** ***

*** ** ***** ** **

P TOUR

* * * *

****

********

** ***

** ***** ***

FF

(By pr essi ng 6- ke y)

OFF

SU B ME NU 1. I F

IF

1. VCO

2. DELAY PO INT

1-2 : SELECT DISP : E XIT

SU B ME NU 2. V /C

V/C PAL

1. CUTOFF
(G)

(B)

50Hz

/ :SELECT

- / + : OPERATE DISP : EXIT

* **
* **

* **

VCO (CW)

TOO HIGH
ABOV E REFERENCE
JUST REF ERE NCE

BELOW REF ERENCE
TOO LOW

AFT AD
VCO ADJUST
FINE

AGC TAKE- OVER

- / + : OPER ATE DI SP : EXIT

***.**

T

DELAY POINT UHF

MH z

** *(* *)

** *(* *)

** *(* *)** *(* *)
** *(* *)

** *(* *)

** *(* *)** *(* *)

DISP : EXIT

**

SU B ME NU 3. D EF

DEF

1. VER. POSITION

/ :SELECT

- / + : OPERATE DISP : EXIT

PAL

**

Hz

SUB ME NU 4. V SM PRES ET

BRI GHT

TINT
COLO UR
BRI GHT

CONT.
SHARP

/ :SELECT

- / + : OPERATE DISP : EXI T

**
**

**
**

**

SUB ME NU 5. P RE SET

16

PRESET

1. C-TRAP FI X

/ :SELECT

- / + : OPERATE DISP : EXIT

PAL

Hz

B/K

*

No. 52028

A

ADJUSTMENT LOCATIONS

V-21E3

TOP

MAIN PWB

F901

CRT SOCKET PWB

TP-47R/G

TP-47G /R

T

IC701

(SOLDER SIDE)

U

TP-47B

TP-E

E1

CRT EARTH WIRE
(BRAIDED ASS'Y)

4

S

IC702

MEMORY IC

FRONT

DEG

PW

S

IC301

TU00 1

T

1Pin TP-91(B1)
2Pin NC

1

S

HV

U

HVT

UPPER:FOCUS
LOWER:SCREEN

3Pin X-ray2
4Pin X-ray1

5Pin TP-E( )

No. 52028

17

A

V-21E3

)

adjust

ADJUSTMENTS

B1 POW ER SUPPLY

Item

Check of
B1 Powe r

Measuring

instrume nt

Signal
generator

Supply

DC Volt ­meter

FOCU S ADJUSTMENT

Item

Ad j ust men t
of FOCUS

Measuring

instrume nt

Signal
generator

IF CIRCUIT ADJUSTMENT

Item

Measuring

instrume nt

Test point Ad justment part Description

TP-91 ( B1)

####

TP-E (

)

1. Inp ut a wh ole black signa l.

2. Connect a DC voltmeter to TP-91(B1) and TP-E (#).

3. M ake sure t hat th e volt ag e is D C 1 16.5±2.0 V.

Test point Ad justment part Description

FOCUS VR

[In HVT]

1. Input a cross-hatch signal.

2. W hil e watch ing the scre en, adjust the FOCUS VR to make the

ver tic al and hori zonta l l in es as f in e a nd sha rp as possib le.

3. M ake sure t hat w he n the s creen is d ar ken ed, the li nes remain i n

g ood focu s.

Test point Ad justment part Description

Ad j ust men t
of VCO(CW

Signal
generator

Remote
control unit

VCO (CW)

TOO HIGH
AB OVE REFEREN CE

JU ST REF ER ENCE
BEL OW R EFERE N CE
TOO LOW

AFT AD JUST
VCO ADJUST
FINE

DISP : EXIT

ADJUSTMENT AT THIS POINT IS USELESS

***.**

MHz

** *(* *)

** *(* *)

** *(* *)** *(* *)
** *(* *)

** *(* *)

** *(* *)** *(* *)

ADJUSTMENT POINT

1. VC O

YE LLOW

Do not

TOO HIGH

ABOVE REFERENCE

J US T R E FE RE NC E

B ELO W RE F E RE NC E

TOO LOW

●Please use signal generator which is correct proof about the

sen ding fr eque ncy.

1. Inp ut th e PA L f ull col o ur b ar (2 10.2 5MHz) s ig nal .

2. En ter th e SERVICE ME NU.

3. Se lect 1.IF f rom the SERV ICE MENU.

4. Press 1 key and s elect 1.VCO.

5. Select VCO ADJUST with MENU ▲/▼ key.

6. Press MENU -/+ key until the colour of t he characters TOO
HIGH ch an ges b lu e to ye l low. T h en g r ad ual l y pr ess th e MENU

-/+ key u ntil th e TOO LOW c h anges yellow . At this t ime, conf irm
th at t he valu e of VCO ADJUST is near + 00 .

0. Select AFT ADJUST with MENU ▲/▼ key.

8. Press ME NU -/ + key until the characters JUST REFERENCE
ch anges bl ue to yel l ow .

9. Press the DI SPLA Y key three times to return to normal screen.

18

No. 52028

A

V-21E3

(QAU0287-001)

(QAU0185-004)

(QAU0282-001)

Item

Ad j ust men t

of DELAY

POI NT

(AGC)

Measuring

instrume nt

Test point Ad justment part Description

Signal
generator

Remote
control unit

DELAY POINT UHF

AGC TA KE-OVER

- / + : OPERATE DISP : EXIT

**

DELAY P OINT

(AGC TAKE-OVER)

1. Inp ut a bl ac k an d wh it e sign al (col o ur of f).

2. En ter th e SERVICE ME NU.

3. Select 1. IF f rom t he SERVI C E M ENU.

4. Select 2 . DELAY P OIN T b y pr es sin g th e 2 key on the remo te

control unit.

5. Se t th e set ting val u es of th e set ting items as s hown bell o w t able .

6. Then adjust the MENU - / + key until video noise disappears.

7. Tur n to oth er ch an nels and m ake su r e th at the re ar e n o

irregularities.

Setting Ite m Variabl e range Initial setting v alue

DELAY P OINT

(AGC TAKE OVER)

NT SC 3.5 8

OTHER

0～127

MATSUSHITA

MURATA

45 45 47

35 45 35

ALPS

No. 52028

19

A

V-21E3

(G)

(B)

VIDEO / CHROMA CIRCUIT ADJUSTMENT

The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.

The setting values which adjust the screen to the optim um condition can be different fr om the initial setting valu es.

Do not c hange th e init ial se tting v alue s of the sett ing items not listed in “ADJUSTMENT”.

Item

Ad j ust men t

of WHITE

BALANCE

(Low light)

Measuring

instrume nt

Test point Ad justment part Description

Signal
generator

Remote
control unit

V/C PAL

1. CUTOFF

50Hz

/ :SELECT

- / + : OPERATE DISP : EXIT

(R)

(B)

* **

* **

* **

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

CU TO FF O F F

(H.LINE OFF)

CU TO FF O N

(H.LINE ON)

R. CUTOFF( )

R. CUTOFF( )

▲
▲

R. DRI VE( )

▼

R. DRI VE( )

▼

123

4

7

56

8

9

RGB

1. CUT OFF (R)

CUT OFF (G)

CUT OFF (B)

SCREEN VR
[IN HVT]

G .C UTOFF ( )

B. C UTOF F( )

B. D RIV E( )

B. C UTOF F( )

B. D RIV E( )

G .C UTOFF ( )

▲
▲

▲

▲

▲

▲

1. Inp ut a bl ac k an d wh it e sign al (col o ur of f).

2. En ter th e SERVICE ME NU.

3. S elect 2. V/C fr om th e S ERVICE MENU, then selec t 1 . C UT OFF

(R), (G) and (B) .

4. Set each value to initial setting value with 4～ 9 keys of the

remote control unit.

5. Press the 1 key of th e re mo te co ntr ol un i t to sh ow th e s in gl e

horizontal line on screen.

6. Tur n t he SCREEN VR f ully counter-clockwise, then slowly turn it

cl ockw is e to wh er e on e of a r ed , blu e or gr e en co l our is f aint l y

vis ible.

7. Use keys 4～9 of th e r em ote c ontr o l uni t an d ad ju s t the oth er 2

col o ur s wh i ch exc ep t th e ap pea r ed col o ur to w he r e th e sin gle

h orizo nt al l in e app ea rs whit e.

8. Turn the SCREEN VR to where t he s in gl e h or iz ont al l in e g lows

fain tly.

9. Press the 2 ke y to turn of f th e single hori zon tal line .

10. Press the DISPLAY key t wice to r eturn to th e n ormal screen.

Adjustment item

R

G

Variabl e

range

-128 ～+127

-128 ～+127

Initial setting

value

-50

-501. CUT OFF

B - 128～+127 -50

Ad j ust men t

of WHITE

BALANCE

(Hi gh light)

Signal
generator

Remote
control unit

2. DRI VE (R

DRI VE ( B)

)

1. Inp ut a bl ac k an d wh it e sign al (col o ur of f).

2. En ter th e SERVICE ME NU.

3. S elect 2. V/C fr om th e S ERVICE MENU.

4. Select 2. DRIVE (R) / (B) with MENU ▼/▲ key, and set each

val u e to initial s etti ng val u e with 4 and 7 or 6 and 9 key s of the

remote control unit.

5. Use the keys 4 and 7 or 6 and 9 t o p ro duce a w hite scr een

6. Press the DISPLAY key twice to retu rn to the nomal scree n.

V/C PAL

2. DRIVE

50Hz

/ :SELECT

- / + : OPERATE DISP : EXIT

20

(R)

* **
* **

No. 52028

Adjustment item

2. DRIVE

Variabl e

range

Initial setting

value

R -128～+127 +0

-128 ～+127

B

+0

A

V-21E3

Item

Ad j ust men t

of

SUB BRIGHT

Ad j ust men t

of

SUB CONT.

Ad j ust men t

of

SUB
COLOUR ⅠⅠⅠⅠ

Measuring

instrume nt

Remote
control unit

Remote
control unit

Remote
control unit

Test point Ad justment part Description

3. BR I G HT 1. Rec ei ve an y br o adc ast.

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

4. Select 3. BRIGHT with the MENU ▼/ ▲key.

5. Set the initial setting value with the MENU - / + key.

6. If the brightness is not t he best with the initial set valu e, make

fine adjustment until you get the best brightness.

4. CONT . 1. R eceiv e an y bro adc ast.

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

0. Select 4. CONT. with the MENU ▼/▲key.

5. Set the initial setting value with the MENU - / + key.

6. If the contrast is no t t he best with th e i nitial s et value, m ak e f ine

adjustment until you get the best contrast.

5. COLOUR [Method of adjustm ent without measuring instrument]

PAL COLOUR

1. R eceive a PAL broa dcast.

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom t he SERVI C E M EN U.

4. Select 5. COLOUR with the MENU ▼ /▲ key.

5. Se t th e initia l setting value for PAL COLO UR wit h the MENU

- / + key.

6. If t he co lour is no t th e be st with th e i n itia l s et v al u e, mak e fin e

adjustment until you get the best colour.

SECAM COLOUR

NTSC 3.58 COLOUR

NTSC 4.43 COLOUR

1. R eceive a SEC AM br oadc ast.

2. M ake fi ne adju stm en t of SE CA M CO LOUR as pr eviou sly.

1. R eceive a NTS C 3.5 8MH z broa dca st.

2. M ake si m ila r fi n e ad justm ent of N T SC 3.58 CO LOU R as

previ ously.

When NTSC 3.58 adjustment completed , NTSC 4.43 will be

automatically set at t he respective va lues.

No. 52028

21

A

V-21E3

))

g

Item

Ad j ust men t

of SUB

COLOUR

ⅡⅡⅡⅡ

W

Measuring

instrume nt

Signal
generator

Oscillo­sc ope

Remote
control unit

Y

Cy

Test point Ad justment part Description

TP-47G/R

TP-E (####)

[CRT S OCKET
PWB]

M

5. COLOUR [Method of adjustm ent using measur ing instrument]

R

(A)

PAL COLOUR

B

(－)

0V

(＋)

1. Inp ut a PA L full field colou r bar sig nal (7 5% wh it e) .

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

4. Select 5. COLOUR with the MENU ▼/ ▲ key.

5. Set the initial setting value of PAL COLOUR with the MENU

- / + key.

6. C on nec t the osc illosc ope be tween TP -4 7G /R and TP- E (#).

7. Ad jus t PAL C OL OU R to br i ng th e val u e of (A) in the illu stration

to + 12V (W- G) . (Vol t age v al u e b etween (W) an d ( G))

G

SECAM CO LOUR

1. Input a SECAM full field colour bar signal (75% white).

2. Set the initial setting value of SECAM COLOUR with t he MENU

- / + key.

3. Ad jus t SE C AM CO LOUR to b ri n g th e valu e of

illu str ation t o +8V(W -G). (V oltag e value b etween (W) an d ( G))

(A)

in the

NTSC 3.58 COLOUR

NTSC 4.43 COLOUR

22

1. Inp ut a N TSC 3. 58 ful l fi e ld colo ur b ar s ign al ( 75 % whi te) .

2. Set the initial setting value of NTSC 3.58 COLOUR with the

MENU - / + key.

3. Ad jus t N T SC 3.5 8 COL OUR to bring t he val u e of (A) in t h e

illu s tr ation to +11V(W-G). (Voltage value between (W) a nd (G

When N TSC 3.5 8 is s et, NTSC 4. 43 will be automati ca lly se t at t he

resp ecti v e values .

No. 52028

A

V-21E3

y

g

(B)

Item

Ad j ust men t
of TINTⅠⅠⅠⅠ

Ad j ust men t
of TINTⅡⅡⅡⅡ

Measuring

instrume nt

Signal
generator

Remote
control unit

Signal
generator

Oscillo­sc ope

Remote
control unit

Test point Ad justment part Description

6. TINT [Method of adjustment without measuring instrument]

TP-47G/R
TP-E (####)

[CRT
SOCKET
PWB]

NTSC 3.58 T INT

NTSC 4.43 TINT

6. TINT [Method of adjustment using measuring instrument]

NTSC 3.58 T INT

1. Inp ut a N TSC 3. 58 ful l fi e ld colo ur b ar s igna l ( 75% white) .

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

4. Select 6. TINT with t he ME NU ▼/▲ key.

5. Set the initial setting value of NTSC 3.58 with the MENU - / +

key.

6. If you c a nn ot get the best tin t wi th th e in i ti al s etti n g v a l ue, ma ke

fine adjustment until you get the best tint.

When N TSC 3.5 8 is s et, NTSC 4. 43 will be automati ca lly se t at t he

resp ecti v e values .

1. Inp ut a N TS C 3.5 8 f ul l fi eld colo ur b ar si gna l (75% white) .

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

4. Select 6. TINT with t he ME NU ▼/▲ key.

5. Set the initial setting value of NTSC 3.58 with the MENU - / +
key.

6. C on nec t the osc illosc ope be tween TP -4 7G /R a nd TP- E. (#).

7. Adjust NTSC 3.58 TINT to bring the value of (B) in the

illustration to +9V(W- Cy) . (Volta ge val u e b etw ee n ( W ) and

(Cy))

W

B

R

M

(－)

0V

Y

C

G

(＋)

NTSC 4.43 TINT

When N TSC 3.5 8 is s et, NTSC 4. 43 will be automati ca lly se t at t he

resp ecti v e values .

No. 52028

23

A

V-21E3

Item

of SECAM
BL AC K

OFF SET

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

COLOUR

ON

COLOUR

OFF

Measuring

instrume nt

Remote
control unit

Signal
generator

12 3

Test point Ad justment part Description

7.SECAM

BL ADJUST

[Method of adjustment using measur ing instrument]Ad j ust men t

1. Inp ut a SE CAM ful l f ield c olour b ar sign al .

2. En ter th e SERVICE ME NU.

3. Select 2. V/C f rom S ERVICE MENU.

4. Select 7. SECAM BL ADJUST with MENU ▼/▲ key.

5. Set the initial setting value with the MENU - / + key.

6. Switch the ①ke y (c olou r OF F) an d ②key (c ol ou r ON ) on the

remote co ntr ol an d make sure th at th er e is no colo ur on th e

blac k an d w h it e scr ee n.

7. If t he bl a c k an d whit e s cree n is no t b es t with th e i ni t ial s ett in g

value, make fine adjustment until you get t he b est black and

white sc r een .

8. W hi l e w atc h i ng th e sc r e en, adj us t th e val u e t o be th e s am e

col o ur b etw ee n O N & OFF b y t en key on t he r em ote c ontro l

un it.

9. Press the DISPLAY key twice to retu rn to the normal scr een.

4

7

56

8

9

24

No. 52028

A

DEFLECTION CIRCUIT ADJUSTMENT

"

The re ar e 2 mod es of adju s tm ent (s etti ng va l ue) - ----- ① 50 Hz m ode an d ② 6 0Hz m ode - -- - - de pendi n g u pon th e k ind of s igna ls

(ver tic al fr eq uenc y 5 0Hz / 60H z).

"

When ad juste d in m od e ① , mode ② will be automatically s et.

The setting (adjustmen t) usin g the REMOTE CONTROL UNIT is made on the basis of the initial setting values.

The setting values which adjust the screen to the optimum condition can be different from the initial settin g values.

V-21E3

Item

Ad j ust men t

of V.HEIG HT

&

V. POSIT I ON

Screen

size

92%

Measuring

instrume nt

Test point Ad justment part Description

Signal
generator

Remote
control unit

DEF

1. VER. POSITION

/ :SELECT

- / + : OPERATE DISP : EXIT

PAL

50Hz

Scre en s ize

1. VE R. POS ITION

3. VE R. HE I G HT

**

Picture
size
10 0%

1. Inp ut a circle p attern si gn al .

2. En ter th e SERVICE ME NU.

3. Select 3. DEF. f rom S ERVIC E MENU.

4. Select 1. VER. POS ITION with t he MENU ▼/▲ key.

5. Set the initial setting value with the MENU - / + key.

6. Adjust V and V’ to be equal with th e MENU - / + key a s sh own in

Fig.2.

7. Inp ut a cr os s -hatch sign al.

8. Select 3. V. HEIG HT with the MENU ▼/▲ key.

9. Set the initial setting value with the MENU - / + key.

10. As shown in Fig.1, adjust VE R. HE IGH T and mak e the verti cal
screen size 92% of the pictu r e s ize w i th t he MEN U - / + k e ys of

remote control unit.

Ad j ust men t

of HO R.

POSITION

Pic ture size 1 00%

Fig.1

Signal

2.HOR. POSITION 11. Input a circle pattern si gnal.

generator

Remote

control unit

HH"

V

V'

Fig.2

No. 52028

12. Sele ct 2. HOR POSITION with the MENU ▼/▲ key.

13 . Se t the initia l sett i ng value of 2. HOR. POSITION wit h the

MENU - / + key.

14. Adju st 2. HOR. POSITION to make H= H " as sh own in Fig. 2

with the MENU - / + key.

25

A

V-21E3

Item

Ad j ust men t

of VER. LI N.

& VER .

SCURVE

Measuring
instrume nt

Signal
generator

Remote
control unit

Fig .3

Test point Ad justment part Description

4. VER. L IN.

5. VER. S CURV E

TOP

CEN TER

BOTTOM

●●●● Whe n the v ertic al lin ea rit y has bee n det e rio rat ed

remark ably, perform the following steps .

15 . Input a cross -hatch signal.

16. Sele ct 4. VER. LIN. with the MENU ▼/▲ key.

17. Set the initial setting value of 4. VER LIN. with the MENU - / +

key.

18. Sele ct 5. VER. SCURVE with the MENU ▼/▲ key.

19. Set the initial setting value of 5. VER . SCURV E wit h th e ME NU

- / + key.

20. Adju st 4. VER. LIN. and 5. VER. SCURVE so that th e s p ac e s

of each lin e as sh ow n i n F i g. 3 o n TOP, CENTER and

BOTTOM become uniform.

Make su r e th at the a dj ust me nt is pr o perly do ne on t he s cre en of

60 Hz mode .

[NOTE]

"

Adjust to make both 50Hz & 60Hz are the same v. size and

fine straight line.

"

When ad just aga i n, adju s t 5 0Hz m ode fi r st.

"

When adjust in 60Hz mode, only 60Hz mode is adjust.

VSM PRESET SETTING

Item

Setting of

VS M

PRES ET

Measuring

instrume nt

Remote

control unit

BRI GHT
TINT
COLO UR

BRI GHT
CONT.

SHARP

/ :SELECT

- / + : OPERATE DISP : EXIT

Test point Ad justment part Description

TINT

COLOUR

BR IG HT

CONT .

SHARP

1. En ter th e SERVICE ME NU.

2. Select 4. VS M PRESE T from the SERVICE MENU.

3. Se lect BRIG HT with th e P ICTURE MODE key.

4. Ad jus t t he M ENU ▼/▲ an d MENU - / + k e y to br ing the s et

val u es of TI NT

tabl e.

5. Resp ectively sel ect th e VSM PRES ET mode f or SOFT an d

STANDARD, and make similar adjustment as in 3 above.

～～～～

SHARP to the values shown in the below

•••• VS M P RESET

VS M

**
**

**
**
**

Setti ng It em

TINT +15

COLOUR +15

BRIGHT +15

CONT +30 +15 +11

SHAR P + 15

BRIGHT STA NDARD SOFT

←
←←

←←

←

←

+12

26

No. 52028

A

PURITY / CONVERGENCE ADJUSTMENT

PURITY ADJUST MENT

1. Demag ne tiz e C RT wit h the dem a gn etizer .

V-21E3

2. L oose n th e re tain er scr ew of th e d eflec ti on yoke .

3. Remove th e wed ge s.

4. Inp ut a g reen r ast er sign al fr om the sign al ge ner at or, an d turn

th e scr een t o gr een r aste r.

5. Move the deflection yoke backward.

6. Br ing t he lo ng lug of th e p ur i ty m agn ets on the s ho rt lug a nd
p osition t he m horizon tall y. ( Fig. 2)

7. Ad ju st t he ga p be tween two l ug s so th at the G RE EN R AS TER
will come into the center of the screen. (Fig.3)

8. M ove the deflec t ion yoke forw ar d, a nd fi x th e pos itio n of th e
deflection yoke so that the whole screen will bec ome green.

9. Ins ert th e w e dge t o the t op side of the defl ec t io n yo ke so that it
will not move.

CR T

#

WEDGE

DEFLECTION

YOKE

P

46

P / C

MAGNET S

P/ C MA GN ETS

P : PURITY M AGN E T
4 : 4 P OLES ( c on v er gen c e m agn ets)
6 : 6 P OLES (con ver gen ce m agn ets)

Fig.1

PURITY MAG NETS

10 . Inp ut a cross hat ch sig na l.

11 . Ve rif y that the scr e en is hor izon tal .

12 . Inp ut r ed and b l ue r as t er sign al s, a nd m ak e sur e tha t purity is

prop er l y ad juste d.

Long lug

Short lug

(FRO NT VIEW )

Bring the long lug over the short lug
and position them horizontally.

Fig.2

GREEN RASTER

CEN TER

Fig.3

No. 52028

27

A

V-21E3

STAT IC CONVERGENCE ADJUSTMENT

1. Inp ut a cr oss hatc h sig nal.

2. U sing 4 - po le c on v er ge nc e m agn ets , ove rla p t he re d a nd blu e

lines i n th e cen ter of th e sc r een (Fig. 1) and tu rn the m to
mag ent a (r ed/ blue ).

3. Us in g 6 - pol e c on v er ge nc e ma gn ets, over l ap the

mag ent a(red/b l ue) a nd g r een l i nes in t he cen ter of the screen
an d t urn t hem t o whit e.

4. Repeat 2 and 3 ab ove, an d make b est c onver ge nce.

DYNAMIC C ONVERGENCE ADJUSTMENT

1. M ov e th e d ef lec ti on yok e up an d d ow n and over lap th e li n es in
the periphery. (Fig . 2 )

2. Move the def l ecti on yoke left to righ t a nd overlap the lines i n the

p erip her y. (Fi g. 3)

3. Repeat 1 and 2 ab ove, an d make b est c onver ge nce.

(FRO NT VIEW )

(FRO NT VIEW )

BLUE

GREEN

RED

Fig.1

GREEN

BLUERED

RED

GREEN

BLUE

●

After ad justmen t, f i x the wedge at the origin al p osi tion .

Fas t en the r eta in er s crew of th e def lec ti on yoke .
Fi x the 6 magn ets with g lue.

(FRO NT VIEW )

GREEN

RED

BLUE

GREEN REDBLUE

Fig.2

Fig.3

BLUE

GREEN

RED

RED
GREEN

BLUE

BLUE

GREEN

RED

28

No.52028

A

REPLACEMENT OF CHIP COMPONENT

!

CAUT IONS

1. Avoid heating for more than 3 seconds.

2. Do n ot ru b the elect ro des an d the resist p ar ts of the patt ern.

3. W hen r em ov ing a c hip part, mel t th e s older ad equate ly.

4. Do n ot reuse a ch ip p ar t afte r re mo v ing it .

! SOLDERING IRON

1. Use a hig h i ns ulati o n s older ing i r on with a t hin poin ted end of it .

2. A 3 0 w s older i ng i r on is rec omm end ed for easily r em oving p ar ts.

! REPLACEMENT STEPS

1. How to remove Chip parts

$$$$ Resi st o rs, capacit ors , etc

(1) As sh own in the f igure, pu s h th e part with tw ee zer s and

alte rn at ely mel t the sol de r at eac h end.

(2) Sh if t with tweeze rs and r em o ve th e ch i p p ar t.

$$$$ Tran s istor s, diodes , varia bl e res ist or s, et c

(1) Ap pl y e xt ra so lder to each le ad .

SOLDE R SOLD ER

V-21E3

2. How to install Chip parts

$$$$

Resi st o rs, ca pacit ors , etc

(1) Ap ply sold er to the pattern as indic ate d in the figure.

(2) Gr as p the ch ip p art with tw ee zer s and pl ac e i t on th e sold er.

The n hea t and me lt th e solder a t b oth en ds of t he chi p part.

$$$$ Tran s istors, diodes , varia bl e r esistor s, etc

(1) Ap ply sold er to the pattern as indic ate d in the figure.
(2) Grasp the ch ip p art wit h t we ezers an d pl ac e it on th e so l der .

(3) First s older lead A as indicated in t he figure.

A

(2) As sh own in the f igure, pu s h th e part with tw ee zer s and

alte rn at ely mel t th e sol d er a t each le ad . S hift an d r em ove the
chip part.

Note : A fte r re moving t he part, r emove remain ing so lder fro m the

pattern.

C

(4) T he n s o ld er l e ads B and C.

A

C

No.52028

B

B

29

A

V-21E3

30

No.52028