JVC AV-21E3 User manual

No. 52028

Jul. 2002

AV-21E

3

AV-21E3

CONTENTS

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

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････････････

･･････････････････････････････････････････････････････････

･････････････････････････････ 2

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

････････････････････････････････････････････････････････････････

･･･････････････････････････････････････････････････････

･･････････････････････････････････････････････

･･･････････････････････ 3

! FEATURES････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････

･･････

･･･ 4

! FUNCTIONS ････････････････････････････････

････････････････････････････････････････････････････････････････

･･････････････････････････････････

････

･･ 5

! SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････

･･････････････････････････

･････････････ 6

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

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････

･･････････････････････････････････････････

･････････････････････ 13

! PARTS LIST ････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････

･･

･31

★

OPERATING INSTRUCTIONS

★

STANDARD CIRCUIT DIAGRAM ････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････

････････････････････････････････

････････････････2-1

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

CG

No. 52028

A

V-21E3

2

SPECIFICATIONS

CONTENT

ITEM

Dimensions(W×H×D) 497mm×454mm×478.5mm

Mass 21kg

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

RF Mode PAL / SECAM

Colour System

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

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

VHF (VH) 175.25MHz～463.25MHz

UHF 471.25MHz～863.25MHz

CATV Cable TVs of Mid (X-Z, S1-S10)

Super (S11-S20) & Hy per (S21-S41) bands receiv able

VIF Carrier 38.0MHz

Intermediate

Frequency SIF Carrier

32.5MHz(5.5MHz)

31.5MHz (6.5MHz)

32.0MHz (6.0MHz)

Colour Sub Carrier Frequency

PAL (4.43MHz),

SECAM (4.40625MHz / 4.25MHz)

NTSC (3.58MHz / 4.43MHz)

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 500mV(rms) (-4dBs), High impedance,

RCA×2 (Front / Rear)

Output Video 1V(p-p), 75Ω

Audio 500mV(rms) (-4dBs), Low impedance,

Headphone jack 3.5mm mini jack

Remote Control Unit RM-C364GY

(Battery size : AA / R06 / UM-3×2)

Design and specifications are subject to change without notice.

No.52028

A

V-21E3

3

SAFETY PRECAUTIONS

1. The d esign of th is pr od uct con ta ins sp ecial har d ware, ma ny

circuit s and components specially for safety purposes. For

con tinu ed prot ection , n o chan g es sh ou ld b e ma de to the o rig inal

d esign un less a uth orized in writin g by the manu fact urer.

Replacemen t parts must be id ent ic al to thos e u sed in th e original

circu it s. S ervice sho uld b e p erform ed by qualif ied pers on nel

on ly.

2. Alte r ations of t he desig n or circuitry of t he prod ucts sh ould not be

made. Any design alterations or additions will void the

manu fact urer's warra nt y and will f urth er r elieve t he ma nu factu r er

of r esponsib ility for perso na l injury or prop erty d am ag e result ing

th er efr om .

3. Man y e lectr ical an d mech anica l p arts in th e pr od ucts ha ve

special safety-related characteristics. T hese characteristics are

oft en no t e viden t f rom visua l insp ection n or can t he pro tect io n

aff orde d by th em nece ssarily b e ob tained b y u sing r ep lacemen t

compo ne nts rated f or hig he r voltag e, watt ag e, etc. Rep lacemen t

p arts whic h ha ve these sp ecial s afet y ch aract erist ics ar e

identified in the parts list of Servic e manual. El ec tric al

components having su ch features are identified by shading

on t he sche matics and by (!

!!

!) on the parts list in Service

manual. The us e of a sub stitute rep lacem en t which do es n ot

h ave th e same saf ety ch aract erist ics as t he reco mmen de d

replac ement par t sh own in th e p ar ts list of S ervice man ual may

cause shock, fire, or other hazards .

4. Do n't short between the LIVE side ground and ISOLATED

(NEUTRAL) 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 is sho wn b y the LIV E : (") side GND, the

ISO LATE D(NEUTRAL) : (#) side G ND and EARTH : ($) side

GND. Do n't sh or t b et ween th e LIV E sid e GND an d

ISO LATE D(NEUTRAL) side GND or EARTH side GND and

n ever mea sur e wit h a m ea sur ing a ppa r atus ( oscilloscop e etc.)

th e LI VE sid e GND an d IS OLA TED(NE UTRAL) side G ND or

EARTH side GND at the s ame time.

If above note 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 ting shou ld b e ch ecked or adju sted (See

ADJUSTMENT OF B 1 POW E R SUPPL Y).

6. The high volta ge app lie d t o th e pictu r e tu be mu st con form wit h

th at sp ecified in S er vice man ual. E xcessive h igh vo lt ag e ca n

cau se an incre ase in X- Ray em ission , ar cing an d possib 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 occurs, remove t he AC power

immed iate ly and de termine th e ca use b y visua l insp ect io n

(in correct in stallat ion, cr acked or melte d high vo lt age har n ess,

p oor soldering, et c.). To m aint ain the p rope r min imu m le vel of

sof t X-Ray emission, c omp on en ts in th e high voltag e cir cuitry

includ ing t he pict ure tube must b e t he e xact rep laceme nts or

alte rnat ives ap prove d b y the manuf act urer of th e c omplet e

pr od uct.

7. Do not c hec k high volt ag e b y dr awing an ar c. Use a high volt ag e

meter or a hig h v oltag e prob e wit h a V TVM. Discha rge the

picture tube before attempting meter connection, by connecting

a clip lead to th e grou nd f rame and c onn ectin g th e oth er end of

the lead through a 10kΩ 2W resisto r to the an od e b utt on .

8. When se rvice is require d, ob serve th e origina l lea d dress. E xtra

prec aut ion sh ou ld b e g ive n t o assure cor r ect lea d dress in th e

high voltage circuit area. W here a s hor t cir cuit h as occu rre d,

th ose compon ent s tha t indica te evide nce of ove rhea ting sho uld

b e re place d. A lwa ys use th e ma nuf act urer's rep lacemen t

components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

Af ter re-ass emb lin g th e p r odu ct, always per f orm an isolat io n

ch eck on the expo sed me tal par ts of t he cabin et (a nte nn a

ter m ina ls, video /au dio input and ou tput t ermin als, Con trol kn obs,

metal cabin et, scr ewhe ad s, earph one jack, con trol shaf ts, etc.)

to be su re th e p rodu ct is s af e t o o pe r ate with ou t d an ger of

elect rical shoc k.

(1) Dielectric Strength Test

The isolation be tween the A C prima ry circu it an d all me tal p ar ts

exp ose d t o th e us er, p articular ly an y e xp os ed met al p art h aving a

retu rn p ath to t he chass is sho uld withs tan d a volt age of 3 000 V

AC (r.m.s.) for a period of one second.

(. . . . W it hstan d a vo lt ag e of 110 0V A C (r.m. s.) t o an ap plianc e

rate d up to 12 0V , an d 3 00 0V AC ( r .m. s.) to an ap pliance r at ed

200V or more, for a period of one second.)

This method of test requires a test equipment n ot generally found

in t he servic e trad e.

(2) Leakage Current Check

Plug th e A C line c ord d irect ly into the A C ou tlet (d o n ot use a lin e

isolatio n transf or mer during this ch eck.) . Usin g a " Lea kag e

Current Teste r", me asur e th e lea kag e cu rre nt f rom each exp osed

metal p art of the ca bine t, p art icu larly any e xpos ed metal p ar t

h aving a re tur n pa th to t he ch assis , t o a kn own go od ea rt h

grou nd (wa ter pipe, e tc.). Any leaka ge curren t must n ot exceed

0.5mA AC (r.m.s.).

Howeve r, in tr op ic al ar ea , this mu st no t exce ed 0.2 mA AC

(r.m.s.).

"

""

" Alternat e Che ck M et hod

Plug th e A C line c ord d irect ly into the A C ou tlet (d o n ot use a lin e

isolatio n tran sfor mer during t his che ck.). Use an AC vo lt me ter

h aving 1 00 0 oh ms pe r volt or m or e sens it ivity in the fo llowing

mann er . Con nec t a 1 50 0Ω 10W res ist or para lle led b y a 0 .15µF

AC-type c apa cit or bet ween an exposed met al pa rt a nd a kno wn

g ood e ar th gro un d (wa ter pipe , etc.). Meas ure the A C vo lt ag e

across th e res ist or with th e AC vo ltmeter. Move the resistor

con nec tion to e ach exp osed metal par t, p art icularly a ny exp osed

metal p art havin g a r etu rn pat h to t he ch assis, and m easu r e th e

AC voltag e ac ro ss the res ist or. No w, reverse th e plu g in the AC

ou tlet and re pe at eac h mea surement. An y volt ag e measu red

must not exc eed 0.75V AC (r.m.s.). This c orresponds to 0.5mA

AC (r.m.s.).

Howeve r, in tropica l area, this must n ot exce ed 0.3V AC ( r.m.s.).

This corresponds to 0.2mA AC (r.m.s.).

0.15μF AC-T YPE

1500 Ω 10W

GOOD EARTH GROUND

PLACE THIS PROBE

ON E A CH EX PO SE D

ME T AL PA R T

AC VOLTMETER

(HAVING 1000 Ω/V,

OR MOR E SENSITIVITY)

No. 52028

A

V-21E3

4

FEATURES

" New ch assis design en ables us e of an int er active on-scr ee n c ont rol.

" Wide r an ge volt age (1 10V ～240V) AC power input.

" With AUDIO / VI DEO INPUT & OUTPUT terminal.

" MUTING but ton can r ed uce the a udio level to zer o inst ant ly.

" Funct ion al remote co ntrol t o o pera te T V set (f or ch ann el se lect, volume c on trol, p ower ON/OFF, etc. ) f r om a d ist anc e.

" I

2C bus control ut ilizes single chip ICs for IF, V /C, DEF. VSM PRES ET, PRESET & S ETUP TOUR.

" By me ans of AUTO PROGRA M, th e TV s tatio ns c an be s electe d aut omatica lly a nd th e TV cha nn els can also b e rearran ge d a ut omatically.

" Built-in ECO MODE (ECONOMY, ECOLOGY)

In accordanc e with th e br ight ness in a roo m, th e br ight ness and / of con tr ast of th e p icture can b e a djust ed au tomat ic ally to m ake th e

op timum picture which is eas y on the e ye.

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

SYSTEM BLOCK DIAGRAM

"

IC301

VIDEO/CHROMA

DECORDER

IC702

MEMORY

TU001

TUNER

IC701

MICRO

COMPUTER

SCL1/SDA1

SCL2/SDA2

No. 52028

A

V-21E3

5

FUNCTIONS

■

FRONT PANEL

■

REAR TERMINAL

■

REMOTE CONT RO L UNIT ECO S ENSOR key

SOUND SYSTEM key

COLO UR SY STEM ke y

TV/VIDEO key

OFF TIMER key

CHA NNE L SCAN k ey

RETURN＋key

DISPL AY key

CHANNEL key

POWER key

PICTURE MODE key

Number (CH.) key

－/－－ key

MUTING key

MENU key

MENU ▲/▼ key

MENU －/＋ key

VOLUME－/＋ key

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

MENU buttons

CHANNEL －/＋ buttons

VOLUME －/＋ butto ns

AI ECO se nsor

RE MO TE CONTROL s ens or

ON TIMER lamp

POW E R la mp

MAIN POWER button

A/V INPUT t erminal

HE ADPHONE jack

1

2

3

4

5

6

7

8

9

10

10 9 1 2 3 4 5 6 7 8

ANT Terminal

VIDEO INPUT Terminal

AUDIO INPUT T erminal

AUDIO OUTPUT Terminal

VIDEO OUTPUT Terminal

1

2

3

4

5

2

3

4

5

1

No. 52028

A

V-21E3

6

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING T HE REAR COVER

1. Unp lug t he po wer plu g.

2. As sh own in f igure , remove t he 5 screws marked !

!!

! an d a

screw marked "

""

"and a screw m ar ked #

##

#.

3. Rem ove th e b ack bo ard an d r e mo ve the p ower c ord f rom th e

rear c over .

4. Withdr a w t he rear co ver toward you .

REMOVING T HE MAIN PW BOARD

" After removing the rear cover.

1. Slight ly raise t he bo th side s of th e M AIN PW Boa rd b y h an d and

remove the PWB stop per of MAIN P W Bo ard .

2. Withdr a w t he MAIN PW Boa rd b ackward.

(If necess ary, ta ke off the wire clamp, c onnect ors etc. )

REMOVING T HE SPEAKER

" After removing the rear cover.

1. As sh own in figur e, remove th e 2 screws marked $

$$

$.

CHECKIN G THE MAIN PW BOARD

1. To ch eck the ba ck side of th e PW B oard.

1) Pu ll out the MA IN PW Bo ard. (Ref er to RE MO VING THE M AIN

PW B oard)

2) Erect th e PW Board vert ic ally so th at you ca n easily check th e

b ack side of th e PW B oard.

[CAUTION]

" When e recting th e PW Board, be car ef ul s o t hat th er e will b e n o

contacting with other PW Board.

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

oth er co nne cto r ar e p r ope rly c onn ect ed.

WIRE CLAMPIN G AND CABLE T YING

1. Be sure to cla mp the wire.

2. Never r em o ve th e c able tie use d f or tying th e wire s to ge the r.

Sh ould it be inad vertently remove d, b e su re to tie th e wir es wit h a

new cable tie.

No. 52028

A

V-21E3

7

CRT SOCKET

PWB

FRONT CABI.

POWER

CORD

(×

××

×2)

(×

××

×5)

SP EAKE R

D

C

B

A

MAIN PWB

REAR

COVER

PWB STOPE R

HV T

BACK BOARD

(×

××

×1)

(×

××

×1)

No. 52028

A

V-21E3

8

REPLACEMENT OF MEMORY ICs

1. MEMORY ICs

This mod el u ses me mo r y I Cs. This memory IC da ta are f or pr o per opera tion of th e vide o a nd d eflect ion circuits.

When rep la cing me mory ICs, b e su re to us e ICs writ ten with t he initial va lues of dat a.

2. PROCEDURE FOR REPLACING MEMORY ICs

(1) Power off

Switch the p ower of f an d disco nn ect t he powe r plug f rom 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 p ower plu g int o t he wall ou tlet and switch t he po we r on .

(4) Check and s et SY STEM CO NSTANT SET

・

・・

・It must not adjust without adjustment signals.

1) Press t he DI SPLAY ke y and the PICTURE MODE key of the REMOTE

CONTROL UNIT simultaneously.

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

3) While the SE RV ICE MENU is displayed , ag ain press the DI SPLAY key and

PICTURE MODE ke y simulta neo usly, an d t he S YSTEM CONSTA NT SE T

screen of Fig. 2 will be displaye d.

4) Check th e sett ing valu es of th e SYS TEM CONSTA NT SET of T able 1 If th e

value is diff erent, select the s ettin g ite m with the MENU ▼/▲key, and s et

th e co rrect valu e with t he MENU - / + k ey.

5) Press the DI SPLAY ke y twice, and return t o th e n ormal scr ee n.

(5) Receive channel of setting

Refer to the OPERATI NG I NST RUCTIONS an d set th e rece ive cha nn els

(chan ne ls prese t) as described

(6) User Setting

Check t he us er s ettin g value of Tab le 2, a nd if se tting value is dif ferent, set

th e co rrect valu e.

For setting, refer to the OPERATI NG INSTRUCTIO NS .

(7) Setting of SERVICE MENU

Ve rif y the set ting it ems of th e SE RVICE MENU, and reset where n ecessa r y.

For setting, refer to the SERVICE ADJUSTMENTS.

S

ERVI

C

E MEN

U

1.IF 2.V

/C

3.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 SELECT DISP : EXIT

******

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

****** *****

**********

***** **

* * * *

* *

.

****

********

****

*** ** **

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

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

** ***** ***

** ***

Fig.1

Fig.2

SY STEM CONSTANT- Ⅰ

ⅠⅠ

Ⅰ

CO

L

OU

R : TRIPLE

BILINGUAL : N O

TUNE R : MU

ECO SENSOR : YES

LANGU AGE : E / R

SYSTEM CONSTANT SE T 1

: SELECT

- / + : OPERATE DISP : EX IT

/

SY STEM CONSTANT- Ⅱ

ⅡⅡ

Ⅱ

B/B SOUND : OF F

LOCK : 180

COLOUR AU TO : NO

QSS : MINT

ALC : NO

TEXT R ATE : 20

SYSTEM CONSTANT SE T 2

:

S

EL -

/

+ :

O

PE DI

S

P : E XIT/

SY STEM CONSTANT- Ⅲ

ⅢⅢ

Ⅲ

AMP T

U

NER : N

O

VNR : YES

TEXT TABLE : CYL

VOLUM PWM : POS

SYSTEM CONSTANT SE T 3

: SEL - / + : OPE DISP : EXIT/

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

MENU

▼/▲ key

MENU

－/＋key

DISPLAY

key

PICTURE

MO DE ke y

NUMBERS

key

No. 52028

A

V-21E3

9

SE TTING OF SYSTEM CONSTANT SET

Setting item Setting contents Setting value

COLOUR TRIPLE

BILINGUAL NO

TUNER MU

AI ECO S ENSOR YE S

LA NG UA GE E / R

B/B SOUND OFF

LO CK YES 10 20 ～ 230 240 250 18 0

COLOUR AUTO NO

QSS MI NT

ALC NO

TEXT RA TE 10 20 40 80 20

AMP TUNER NO

VNR YE S

TEXT TABLE CYL

VOL UM PW M POS

Table 1

US ER SE TTING V ALUES

Setting item Setting value Setting item Setting value

SUB POWER ON LANGUAGE ENGLISH

CHA NNEL PO SITIO N 1 PO SITIO N CHA NNEL PRE SET Refe r t o OPE RATING I NSTRUCTION

VOL UME About 10 AI ECO SENSOR OFF

TV/VIDEO TV VNR OFF

ON SCREEN DI SPL AY POSITION INDICATIO N AUTO SHUTOFF OFF

COLOUR SYSTEM PAL ON TIMER PR1 0:00

SOUND SYSTEM B / G BLUE BACK OFF

OFF TIMER OFF OSD.Shows 00 CHILD LOCK OFF

PICTURE MODE (VSM) BRIGHT SETUP TOUR ON

Table 2

YE S NO

ON OFF

YE S NO

MI NT MQ SS

YE S NO

ARA CYL

MU MA

MUL TI. PA LTRIPLE

POS NEG

E/R/A /P E

/

R

No. 52028

A

V-21E3

10

INITIAL SETTING VALUE OF SERVICE MENU

1. Ad justment of the SE RVICE MENU is m ade on the basis of the initial set ting va lues ; howev er, the new se tting va lues w hi ch

set the screen in its optimum condition may differ from the initial setting.

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

2. V/C

Initial setting val ue

Colour s

y

stem

Setting item

Va riabl e

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

RED

GREEN1. CUT OFF

BL UE

- 128 ～+127 -50

RED

2. DRI VE BL UE - 128 ～+127 + 0

3. BR IG HT -127～+127 + 0

4. CONT . -63～+6 3 + 0

5. COLOUR -63～+6 3 + 0

TV + 0 + 0

6. TINT VI DE O

-63～+6 3 + 0 + 0

7. SECAM BL ADJ. -31～+3 1 + 0

TV - 8(Fixed)

8. SHARP (Do Not Adj.)

VI DE O

-32～+3 1

+15(Fixed)

3. DEFLECTION

Initial setting val ue

Setting item Variable range

fv : 50Hz MODE fv : 60Hz MODE

1. VER. POS ITION -04 ～ +03 - 1 - 3

2. HOR. POSITION -16 ～ +15 + 3 + 3

3. VER. HEIGHT -64 ～ +63 -35 + 1

4. VER . L INE AR ITY -32 ～ +31 +15 - 1

5. VER. S CURV E -32 ～ +31 -32 + 0

6. H OR. VCO ADJ UST (Do Not Adj.) - 63 ～ +62 + 0 + 0

4.VS M PRESE T

VS M

p

r ese t

mode

VS M

Setting item

BRIGHT STANDARD SOFT

TINT SE TTING VA LUE +1 5

COLOUR SETTING VA LUE +15

BR IG HT SETTING VA LUE +1 5

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

SHARP SE TTING VA LUE +1 5 +12

No. 52028

A

V-21E3

11

5. PRESE T

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

If values had changed by the mi ss opera tion, set the initial setting v alues in the fol lowing table.

Colour Sy stem Do Not Ad just

Initial setting val ue (Fixed value)

Setting item

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

1. C TRAP FIX 1 1 1 1

2. SHARP PEAK 0 0 0 0

3. ABL 1 1 1 1

4. GAMMA 0 0 0 0

TV 0 2 2 3

5. Y. DELAY TIME

VI DE O 0 2 0 2

6. BL ACK EXP START ＋3 ＋3 ＋3 ＋3

TV 1 1 0 0

7. C-BPF

VI DE O 1 1 1 1

8. CW / SCP 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 . VNR 15 15 15 15

20 . RGB LIM 1 1 1 1

21. RGB LIMIT LEVEL 2 2 2 2

23. TEXT H. POS ITION -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 ＋0＋0＋0＋0

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 S W 0 1 1 1

No. 52028

A

V-21E3

12

REPLACEMENT OF IC301 (IF V/C DECODER)

" For the I C301(I F V /C DECODER) of this model, all data are written in the micro-computer. So, wri te the data in the micro-

computer in accordance with the following procedures before starting adjustment.

PROCEDURES

(1) Tur n t he POWE R O FF.

(2) Replace t he IC301 with a n ew o ne .

(3) While pressing ME NU bu tto n a nd VO L+ bu tto n ON the FRO NT CABINE T s imult ane ous ly, t urn th e POW ER O N. Wh en the POW ER is

turned ON, th e data is writ ten in t he micro-co mputer immediately.

LOCATIONS OF FRONT PANEL BUTTONS AND LAM PS

MENU buttons

CHANNEL ･ / ･ buttons

(ME NU ･ / ･ bu tt ons)

VOLUME

－/＋ buttons

(MENU －/＋ bu tto ns)

AI ECO sensor

REMOTE CONTROL sens or

ON TIMER lamp

POWER lamp

MAIN POW ER button

MENU buttons

CHANNEL －/＋buttons

(ME NU －/＋buttons)

VOLUME

－/＋ buttons

(MENU －/＋ bu tto ns)

AI ECO sensor

REMOTE CONTROL sens or

ON TIMER lamp

POWER lamp

MAIN POW ER button

1

2

3

4

5

6

7

8

12345678

No. 52028

A

V-21E3

13

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1. There ar e 2 w ay of adjus ti ng thi s TV: One i s wi t h the

REMOTE CONTROL UNIT 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 the initial setting v alues. The setting values

which adjust the screen to its optimum condition may differ

from the initia l s etti ng v al ues.

3. Make s ur e th at conn ect ion is c orrect ly ma de t o AC p ower

sourc e.

4. Turn on t he p ower of th e se t and eq uipmen t bef or e us e, an d

start t he ad justmen t proc edur e s af ter waitin g at least 30 min utes.

5. Unless ot herwise spec if ied, p r ep are th e mo st suita ble rec eption

or input sign al for adjust ment.

6. Nev er t ouc h a ny adjus tment part s, whi ch ar e not spe cif ied

in the li st for thi s adjustme nt VRs , t ra nsf or ms, c onde nser s,

etc.

7. Prep ar atio n f or ad justm en t

Unless otherwis e 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 CENTER

BLUE BA CK OFF

OFF TIMER OFF

AI ECO S ENSOR OFF

AUTO SHUT OFF OFF

MEASURING INSTRUMENT AND FIXTURES

1. DC voltmeter (or digital voltmeter)

2. Oscilloscope

3. Sign al g en erat or (Patt er n g en erat or) [ PAL / S ECAM / NTS C]

4. Remote control unit

ADJUSTMENT ITEMS

Ad justment item Ad justment item

B1 POW E R SUPPL Y DEFLECTION circuit adjustment

FOCUS adjustment VSM PRESET setting

IF circ uit adjust ment PURITY/ CO NVERGENCE adjus tm ent

V/C (Video / Chroma) circuit adjustment

No. 52028

A

V-21E3

14

BASIC OPERATION OF SERVICE MENU

" The adjustment using SERVICE MENU

The f ollowing adjus tme nt it ems u se t he SE RV ICE MENU in th e series of the adju stment . The ad ju stment s are made on the bas is of the

initial se tting valu es. Th e ad justm ent valu es which ad just t he screen to th e o ptim um co ndit io n c an b e diffe re nt from th e in itia l sett ing values.

With th e S ERVICE MENU, var ious s ett ings c an be made , a nd the y ar e br oa dly classifie d in th e f ollo win g ite ms of s ettin gs.

1.I F ･･･････････････････････ Adjustment of th e IF circuits.

2.V /C ･･････････････････････ Ad justment of th e VIDEO /CHRO MA circuit.

3.DEF ･････････････････････ Adju stment of the DEFLECTION circ uit.

4.V SM PRESET ････････････ Ad justmen t of th e init ial sett ing va lues of VSM cond it ion as STA NDA RD, SOFT a nd BRIGHT.

(VSM : Video Status Memory)

5.PRESET ･････････････････ Adjustment of th e RF circ uit [Do not adjust].

6. SETUP TOUR OFF ･･･････ It s hou ld b e able to select m ode (LANGUAG E a nd AUTO CH PRESE T)..

[Shou ld be OFF].

" Key operation of the SERVICE MENU

[Enter to SERVICE MENU]

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

UNI T simu lt an eou sly. Th en ent er th e S ERVICE MENU mod e as sh own in Fig.1 .

[Exit from SERVICE MENU]

When co m plete th e ad just me nt work, pr ess th e DI SPLAY key to return t o the

SERVICE MENU.

An d then press th e DI SPLAY ke y ag ain, return to th e n ormal screen .

[ Se lec t from SE R VICE M E NU]

In SERVI CE M ENU, press t he n umber (1 ～6) ke y of th e remo te c ont rol un it , to se lect

an y of the ad justm en t ite ms.

The colo urs which se le cted ite m ch ar act ers a re ch ang ed .

SE RVICE MENU

SE RV ICE ME NU

1.IF 2.V/C

3

.DEF 4.V

S

M PRE

S

ET

5.PRESET

6.SETUP TOUR OFF

1-6 SELECT DISP : EXIT

******

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

***********

**********

***** **

****

**

.

***

******

***

*** ** **

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

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

** ***** ***

** ***

Fig.1

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

MENU

▼/▲ key

MENU

－/＋key

DI SP L A Y k e y

PICTURE

MO DE ke y

NUMBERS

key

No. 52028

A

V-21E3

15

[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 SE RVICE ME NU.

[2. DELA Y P OINT]

① 1 K ey･････････････････････････ Select 1.IF.

② 2 K ey･････････････････････････ Sele ct 2.DELAY P OINT.

③ ME NU - /+ K ey ･････････････････ Set (adjust) the setting values of the s etting ite ms.

④ DISPLAY Key･･････････････････ W hen th is is pr essed t wice, you will ret ur n t o t he SE RV ICE MENU.

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

① 2~4Key ･･･････････････････････ Select one from 2. V/C, 3. DE F an d 4. VSM PRE SET.

② MENU ▼/▲ Key ･･････････････ Select s etting items.

③ MENU -/+ Key ･････････････････ Adju st the va lues of t he item s.

④ DISPLA Y K ey ･･････････････････ When th is is presse d, re turn t o t he SE RVICE MENU.

6.SE TUP TOUR

① B y pressing the 6 key, you can ch ang e t he ON or OFF ( should be OFF).

(Should be OFF)

%･If it is ON, th en you tu rn th e TV po wer off , wh en you are t ur n t he TV p ower o n a ga in.

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

② MENU -/+ Key ･････････････････ Select Language.

③ MENU ▼ Key･････････････････ Au to Search.

No. 52028

A

V-21E3

16

SERVICE MENU FLOW CHART

S

ERVI

C

E MEN

U

1.IF 2.V/C

3.DEF 4.VSM PRESET

5.PRESET

6

.

S

ET

U

P T

OU

R

O

FF

1-6 SELECT DISP : EXIT

******

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

***********

**********

***** **

* * * *

* *

.

****

********

****

*** ** **

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

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

** ***** ***

** ***

SE RVICE MENU

IF

1. VCO

2. D ELAY PO INT

1-2 :

S

ELE

C

T DI

S

P : E XI T

SU B M E NU 1. I F

VCO (CW)

***.**

MH z

T

OO

HI

G

H

ABOVE REF ERENCE

JUST REF ERENCE

BELOW REFERENCE

TOO LOW

AFT AD

JUS

T

** *(* *)

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

** *(* *)

VCO ADJUST

** *(* *)

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

** *(* *)

FINE

DISP : EXIT

DELAY POINT UHF

AGC TAKE-OVER

**

- / + : OPERATE DISP : EXIT

6

.

S

ET

U

P T

OU

R

O

N

/

OFF

(By pr essing 6- key)

BRIGHT

TINT

COLOUR

BRIGHT

CONT.

SHARP

-

/

+ :

O

PERATE DI

S

P : EXIT

**

SUB ME NU 4. V SM PRES ET

/ :SELECT

DEF

- / + : OPERATE DISP : EXIT

**

SU B M E NU 3. D EF

/ :SELECT

50

Hz

1. VER. POSITI ON

PAL

V/C PAL

1. CUTOFF

- / + : OPERATE DISP : EXIT

(

R

)

* **

(G)

* **

(B)

* **

50Hz

SU B M E NU 2. V /C

/ :SELECT

PRESET

1.

C

-TRAP FIX

- / + : OPERATE DISP : EXIT

*

50

Hz

SUB ME NU 5. P RE SET

/ :SELECT

B

/

K

PAL

O

FF

No. 52028

A

V-21E3

17

ADJUSTMENT LOCATIONS

S

1Pin TP-91(B1)

2Pin NC

3Pin X-ray2

4Pin X-ray1

5Pin TP-E( )

HVT

S

1

HV

U

IC301

MEMORY IC

IC702

IC701

F901

DEG

TU00 1

FRONT

TOP

MAIN PWB

CRT SOCKET PWB

(SOLDER SIDE)

TP-47G /R

E1

U

T

PW

UPPER:FOCUS

LOWER:SCREEN

TP-47R/G

TP-47B

TP-E

T

CRT EARTH WIRE

(BRAIDED ASS'Y)

S

4

No. 52028

A

V-21E3

18

ADJUSTMENTS

B1 POWER SUPPLY

Item Measuring

instrument Test point Ad justment part Description

Check of

B1 Power

Supply

Signal

generator

DC Volt -

meter

TP-91 ( B1)

TP-E (#

##

#)

1. Input a wh ole black sig na l.

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

3. Make sure t hat th e volt ag e is DC1 16. 5±2.0 V.

FOCUS ADJUSTMENT

Item Measuring

instrument Test point Ad justment part Description

Ad just men t

of FOCUS

Signal

generator

FOCUS VR

[In HVT]

1. Input a cross-hatch signal.

2. While watching the screen, adjust the FOCUS VR to make the

vertical and ho rizo nta l lin es as f ine a nd sha rp as possib le.

3. Make sure t hat whe n th e s cre en is d ar kened, th e lines remain in

g ood focu s.

IF CIRCUIT ADJUSTMENT

Item Measuring

instrument Test point Ad justment part Description

●Please use signal generator which is correct proof about the

sen ding freq ue ncy.

Ad just men t

of VCO

(

CW

)

Signal

generator

Remote

control unit

1. VCO

1. Input th e PA L f ull colour b ar (210 .25MHz) sig nal.

2. En ter th e SERVICE MENU.

3. Sele ct 1.IF f rom the SERVICE MENU.

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

5. Select VCO ADJ US T with MENU ▲/▼ key.

6. Press MENU -/+ key until the colour of the characters TOO

HIGH ch an ges b lu e to ye llow. Th en g r ad ually press th e MENU

-/+ key u ntil th e TOO LOW ch ang es yellow. At this t ime, conf irm

th at t he valu e of VCO ADJUST is n ear +00 .

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

8. Press MENU -/ + key until the characters JUST REFERENCE

ch ang es b lue to yellow.

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

VCO (C W)

***.**

MHz

TOO HIGH

AB OVE REFEREN CE

JU ST REF ER ENCE

BELOW R EFEREN CE

TOO LOW

AFT AD JUST

** *(* *)

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

** *(* *)

VCO ADJUST

** *(* *)

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

** *(* *)

FINE

DISP : EXIT

YE LLOW

D

o

n

ot

adjust

ADJUSTMENT AT THIS POINT IS USELESS

AB

O

VE REFEREN

C

E

TOO HIGH

B EL OW RE F E RE NC E

J US T R EF E RE NC E

TOO LOW

ADJUSTMENT POINT

No. 52028

A

V-21E3

19

Item Measuring

instrument Test point Ad justment part Description

Ad just men t

of DELAY

POI NT

(AGC)

Signal

generator

Remote

control unit

DELAY POINT

(AGC TAKE-OVER)

1. Input a blac k and whit e sign al (colo ur of f).

2. En ter th e SERVICE MENU.

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

4. Select 2. DELAY POINT by pr essin g th e 2 key on the remote

control unit.

5. Set the settin

g

valu es of th e set tin

g

items as s ho wn bellow t able .

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

7. Tur n to oth er ch an nels and make su re that the re are n o

irregularities.

Setting Item Variabl e range Initial setting v alue

MATSUSHITA

(Q

A

U0

2

8

7-

00

1

)

MURATA

(Q

A

U0

1

85

-

00

4

)

ALPS

(Q

A

U0

2

8

2-

00

1

)

NT SC 3.5 8

45 45 47

DELAY POINT

(AGC TAKE OVER) OTHER

0～127

35 45 35

DELAY POINT UHF

AGC TAKE-OVER

**

- / + : OPERATE DISP : EXIT

No. 52028

A

V-21E3

20

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 optimum condition can be different fr om the initial setting valu es.

Do not change the initial setting values of the setting items not listed in “ADJ USTMENT”.

Item Measuring

instrument Test point Ad justment part Description

Ad just men t

of WHITE

BALANCE

(Low light)

Signal

generator

Remote

control unit

1. CUT OFF (R)

CUT OFF (G)

CUT OFF (B)

SCREEN VR

[IN HVT]

1. Input a blac k and whit e sign al (colo ur of f).

2. En ter th e SERVICE MENU.

3. Select 2. V/C from the S ERVICE MENU, then selec t 1. CUT 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 remote co ntrol un it to sh ow th e single

horizontal line on screen.

6. Tur n t he SCREEN VR fully counter-cloc kwise, then slowly turn it

clockwis e to where on e of a r ed , blu e or gr e en co lour is f aint ly

vis ible.

7. Use keys 4～9 of the rem ote c ontro l u nit an d ad ju st the oth er 2

colo ur s which e xcep t th e ap pea r ed colo ur to whe re th e sin gle

h orizo nt al line app ea rs wh it e.

8. Turn the SCREEN VR to where t he sin gle h oriz ont al line g lows

fain tly.

9. Press the 2 key to turn off the single horizontal line.

10. Press the DI SPLAY key t wice to return to the normal screen.

Ad just men t

of WHITE

BALANCE

(High light)

Signal

generator

Remote

control unit

2. DRI VE

(R)

DRI VE (B)

1. Input a blac k and whit e sign al (colo ur of f).

2. En ter th e SERVICE MENU.

3. Select 2. V/C from the S ERVICE MENU.

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

valu e t o initial s etting valu e with 4 a nd 7 or 6 an d 9 keys of th e

remote control unit.

5. Use the keys 4 and 7 or 6 and 9 t o p ro duc e a white scr een

6. Press the DI SPLAY key t wice to return to the nomal screen.

Ad justment item Va riabl e

range

Initial setting

value

R- 128 ～+127 -50

G- 128 ～+127 -501. CUT OFF

B - 128 ～+127 -50

Ad justment item Va riabl e

range

Initial setting

value

R - 128 ～+127 +0

2. DRIVE B-128 ～+127 +0

V/C PAL

1. CUTOFF

- / + : OPERATE DISP : EXIT

(R)

* **

(G)

* **

(B)

* **

50Hz

/ :SELECT

123

456

789

CU TO FF O N

(H.LINE ON)

CU TO FF O F F

(H.LINE OFF)

R. CUTOFF( )

▲

R. DRI VE( )

R. CUTOFF( )

R. DRI VE( )

▼

RGB

G .C UTO FF ( )

▲

B. C UTOFF( )

▲

B. D RIV E( )

▲

B. C UTOFF( )

B. D RIV E( )

G .C UTO FF ( )

▼

▲

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

V/C PAL

2. DRIVE

- / + : OPERATE DISP : EXIT

(R)

* **

(

B

)

* **

50Hz

/ :SELECT

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JVC AV-21E3 User manual

JVC AV-21E3 User manual

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