JVC AV20BJ8EES, AV21BJ8EES, AV21BJ8ENS, AV21BJ8EPS Service Manual

S

SERVICE MANUAL

COLOUR TELEVISION

AV21BJ8ENS
AV21BJ8EPS

AV21BJ8EN
AV21BJ8EPS
AV21BJ8EES
AV20BJ8EES

AV21BJ8EES
AV20BJ8EES

AV21BJ8 AV20BJ8

CONTENTS

!

SPECIFICATIONS

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

FEATURES

!

MAIN DEFERENCE LIST ･･････････････

1

･･････････････････････････

･･････････････････････････

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

････････････････････

････････････････････

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

･･････････････4

････････････････････････････

･･････････････5

････････････････････････････

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

2

5

!

SPECIFIC SERVICE INSTRUCTIONS

! SERVICE ADJUSTMENTS････････････
!

PARTS LIST

★

STAND ARD CIRCUIT DIAGRAM

･･･････････････････････

･･･････････････････････

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

････････････ 11

････････････････････････

････

････

････････

･･･････

･･･････

･･････････････

No.519 98
Apr. 2002

6

21

2- 1

A

V21BJ8ENS

A

A

A

V21BJ8EPS
V21BJ8EES
V20BJ8EES

SPECIFICATIONS

Content

It em AV21 B J8 ENS

Dimensions ( W

Mass 20 kg 17 .8 kg

TV RF System B/G (ENS models) B /G , L/ L’ (EP S models) B/G , D/K (EES models)

Colour Syst em

Sound System Mono

Teletext System WST (W orld Standard system)

Receiving Frequency

Intermediate Fr equency

Colour Sub Carrier Freq.

Power Input AC 2 20V～240V , 50Hz

Power Consumption 85 W , 4W (Stand by)

Aerial Input Term 75 Ωun ba lanc ed, C oax ial

Pictur e Tube Size Visi bl e size : 51cm , M easured di a gonal l y Visi bl e size : 48cm , Meas ured dia gonal ly

Hi gh Vo l t ag e 26 kV (in cu t-off ser vic e m od e)

Speake r 5cm ×9cm Ova l type ×2

Au dio Output 8W

REAR TERMINAL(AV1) 21 -p i n E uro c onnec to r

FRONT TERMINAL Video 1Vp-p 7 5Ω( RCA pin jack)

Headphone jack Mi ni j ac k (φ3. 5m m )

Remote Control Unit VE -3 00 17763 (R M-C 1100), (A A/R0 6 dry b atter y×2)

××××H××××

D ) 59 6m m×4 46m m×4 90m m 59 6m m×4 46m m×4 90m m

PAL, NTSC3.58 / NTSC4.43(Only EXT mode)----ENS model

PAL , SECAM , NTSC3.58 / NTSC4.43(Only EXT mode)----EPS,EES models

VHF (VL) 46 .25 MHz ～ 1 68. 25MHz

(VH) 17 5.25MH z ～ 46 3.2 5MHz

UHF 471.2 5MH z ～ 86 3.2 5MHz

CATV S1-S20&S21-S41&S75-S79 ----- ENS models

S1-S20&S21-S41&S75-S79 ----- EPS models

S1-S20&S21-S41 ------------------- EES models

VIF Carrier 38 .9 MHz ( B/G , D/K , L) / 33.9MHz ( L’)

SIF Car rier 33.4 MHz (5 .5MHz:B/G) / 32. 9MHz (6.0MHz:D/K) / 32.4 MHz (6.5 MHz: L) / 40.4MHz ( 6 .5MH z:L’)

PAL 4.43MHz

SE CAM 4.2 5 MH z / 4 .40 62 5MH z

NT S C 3.58MHz / 4.43MHz

Au di o 50 0m Vr ms( -4dB s ), H igh Im pe dance ( RCA pin jack )

AV21 BJ8EPS
AV21 BJ8EES

AV20 BJ8EES

De sign & speci f icatio ns ar e su bje ct to cha ng e wi thout no t ice.

2

No.51998

A

A

S

A

S

A

S

■■■■21-pin Euro connector (SCART socket) : AV-1

(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

Pin No.

1

2

3

4

5

6

7

8

9

10 SCL3 NC

11 G in put 70 0m V

12 SDA3 NC

13 GND (R) ○

14 GND (YS) ○

15

16

17 GND(VIDEO output) ○

18

19

20

21

AUDIO R o utput 50 0m Vr ms(Nomina l) ,

AUDIO R i n put 50 0m Vr ms(Nomina l) ,

AUDIO L outp ut 50 0m Vr ms(Nomina l),

AUDIO G ND ○

GND (B) ○

AUDIO L input 500mVrms(Nominal),

B in pu t

FUNCTON SW

(SLOW SW)

GND (G) ○

R / C input

Ys i n put

GND(V IDEO input)

VIDEO ou tpu t

VIDEO / Y input

COM MON G ND ○

Signal Designation Matching Value AV-1

Low impedance

High i m pe danc e

Low impedance

High i m pe danc e

70 0m V

Low : 0-3V, High : 8-12V, High

impedance

R : 700mV

C : 300mV

Low : 0 - 0.4, High : 1 - 3V, 75

1V

1V

, 75Ω○

B- W

, 75Ω○

B- W

, 75Ω

B- W

Ω

, 75

P- P

Ω○

(Nega ti ve g oi n g s ync ), 75Ω○

P- P

(Nega ti ve g oi n g s ync ), 75Ω○

P- P

○

(TV OUT)

○

○

(TV OUT)

○

○

○

(only R)

○

(TV)

[Pin a ssignment]

No.51998

3

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V21BJ8ENS

A

A

A

V21BJ8EPS
V21BJ8EES
V20BJ8EES

SAFETY PRECAUTIONS

1. T he des ign of th is prod uct con ta ins sp ecial har dware, 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 ould b e ma de to the o rig i nal
d esign un less a uth or ized in writi n g by th e manu fac t urer .

Replacem ent p arts m ust b e i d entic al to thos e u sed in th e or i gi n al
ci rcu its. Se r v ic e sh ou ld be pe rf or me d b y qua li fi e d per s o nn el
on ly.

2. Alte r ation s of the desi g n or circui tr y of t he prod 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 injury or pr operty d am ag e res ul t ing
th erefr om.

3. M an y e l ec tr i c al an d m ech ani ca l p ar ts in th e prod ucts ha ve
special safety-related chara cteristics. T hese characteristics are
oft en no t e vi den t f r om v i sua l insp ecti on nor ca n t he pro tect io n
aff orde d by th em nece ssarily be ob tain ed b y u s in g r ep l ac em en t
com po nents rated for hig he r vo l tag e, watt age, etc . R ep lac em en t
p arts whic h have th ese sp ecial s afet y ch ar act erist ics ar e

ide ntified in the parts list of Ser vic e manua l. El ectric al

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

h ave th e sam e s af ety c h ar ac t erist ics as t he reco mmen ded
replac ement par t sh ow n i n th e parts list of Ser v i ce man ual m ay

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. T he
diff erenc e of th e GND is sh ow n by t he LIVE : (") side GN D, the
ISO LATE D(N EU TR AL) : ( #) side GN D an d EA RTH : ($) side
GND. Don't short between the LIVE side GND and

ISO LATE D(N EU TR AL) si de GND or EAR TH sid e GN D an d
n ever mea sure w it h a mea sur i ng a ppa r atus ( osci l lo scop e etc.)
th e LI VE sid e GN D an d IS OL ATED(NEUTR AL ) s id e GN D 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 ting shou l d b e c h ec ked or adju ste d ( Se e
ADJUSTM ENT OF B 1 POW E R SUPPLY).

6. The high vol ta ge app lie d t o th e pi ctu r e tu be mu s t c on form wit h
th at sp ecifi ed i n S ervi ce man ual . E xc essi ve h i gh volt ag e c a n

cau se an i ncr e ase 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 ing occur s, r emov e t he AC power

immed iate l y and de ter m i ne th e ca us e b y vi sua l insp ec t ion
(incor r ec t in stal lat i on, cr ac ke d or melte d hi gh v o lt age har n ess,
p oor so ld er ing, et c.) . T o m ai nt ain the prope r mi n imu m le vel of
sof t X- R ay em iss i on, c omp on en ts i n th e hi gh voltag e c i r cuitr y
incl ud i ng t he pict ure tu be must be t he e xact r ep lacem e nts or

alte rn at ives ap pr ove d b y th e manuf ac t urer of th e c omplet e
prod uct.

7. Do not c hec k hi gh volt ag e by dr aw i ng an arc. Use a hi gh volt age
meter or a hig h v oltag e pr ob e wit h a VT V M. Dis charg e the
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 ecti n g th e oth er end of
the lead through a 10kΩ 2W resi s to r to the anod e butt on .

8. When service is r equ ire d, ob serve the or igina l lea d dr ess. E x tr a
prec aut i on sh ou ld b e given t o assur e cor r ect l ea d dress in th e
high vol tag e circui t a rea. W her e a s hor t c i r cuit h as occ u rr e d,
th ose co mpon ent s tha t indica te evide nce of ove r hea ting should

b e r e place d. A lways u s e th e manuf act ur er 's rep lacem ent
components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

Af ter r e- ass embl in g th e p r odu ct, always per f orm an i solat io n
ch eck on the expo s ed me tal p ar ts of t he cabin et ( a nte nn a

ter m i na ls, vid eo /au dio i npu t and outpu t t ermi n al s, C on trol kn obs,
metal cabinet, screwheads, earphone jack, control shafts, etc.)
to be su re th e p r odu ct is s af e t o o pe rate with ou t d an ger of
elect rical shoc k.

(1) Dielectric Strength Test

The iso lation be tw een the AC pr im a ry ci rcu it an d al l me tal p arts
exp osed t o the us er, p ar ticular ly an y e xpos ed met al p art having a
retu rn p ath to t he c hass is sho uld withs tan d a vol t age of 3000 V
AC (r.m. s.) for a period of one sec ond.

(. . . . W it hstan d a v o lt age 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 pl i an c e r at ed
200V or more, for a period of one second.)
This meth od of test r equi res a test equipment n ot g enerall y fou nd
in t he serv ic e trad e.

(2) Leakage Current Check

Plug th e AC l in e c ord d irect ly into the A C ou tlet ( d o not use a lin e
isol ati o n transf orm er du r ing this ch eck.). U sin g a " Lea kag e

Current T este r", me as ur e th e l ea k ag e cu rr e nt f rom eac h ex p os ed
metal p ar t of the cabine t, p art icu lar ly any e x pos ed me tal p art
h aving a re turn pa th to the ch assis , 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 trop ic al ar ea , th is mu st no t ex ce 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 irect ly into the A C ou tlet ( d o not use a lin e
isol ati o n tran sfor m er dur i ng this c he c k.). Use an AC vo lt meter

h aving 1 00 0 oh ms pe r vol t or mor e s ens it i vity i n th e fo llowi ng
mann er . C on nec t a 1 50 0Ω 10W res ist or para lle led b y a 0 .1 5µF

AC-type c apa cit or bet ween an expo sed met al pa rt and a kno wn
g ood e ar th gr o und (water pi pe , etc.) . M eas ur e th e A C volt ag e
acr os s th e res ist or wi th th e AC vo l tm eter. Move th e r es i stor
con nec tion to e ach exp ose d me tal part, p art i cularly any exp osed

metal p ar t havi n g a r etu rn pat h to the ch assis, and m easu r e th e
AC vol tag e ac ros s the res ist or. No w , re v er se th e pl u g in th e AC
ou tl et and re pe at eac h mea suremen t. An y vol t ag e me asu re d
must no t e xc eed 0 .7 5V AC (r.m. s.) . This c orre spo nds 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.).

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

4

No.51998

A

A

S

A

S

A

S

FEATURES

"

This TV set is monaural TV

" The TELETEXT SYSTEM has a built-in WST syst em.
"

Built-in CHILD LOCK function .

" Built-i n S LEEP TI ME R fun ction.

MAIN DIFFERENCE LIST

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

Model Name

!!!!

Part Na me

MAIN PWB VE-20096167 VE-20096166 VE-20096169 VE-20096170

FRONT AV JACK PWB VE-20090024 VE-20096663

!

PICTURE TUBE (ITC) VE-30002749 VE-30002748

!

DEG COIL VE-30002124 VE-30002119

!

INST BOOK VE-50026383 VE-50026394 VE20026398

AV21 BJ8E NS AV21 BJ8E P S AV21 BJ8E E S

AV20 BJ8E E S

No.51998

5

A

V21BJ8ENS

A

A

A

V21BJ8EPS
V21BJ8EES
V20BJ8EES

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug t he po we r c ord.

2. Remove the 5 screws marke d A as show n in t he Fi g. 1.

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

REMOVING THE MAIN PWB

" Removing the rear cover.

1. Remove the s crew marked B as s hown in the Fig.1.

2. Slight l y raise t he bo th s id es of th e ch assi s b y h and an d withd raw

th e M AIN PW B backw ar d.
(If necessary, take off the wire clamp, co nnectors etc.)

REMOVING THE SPEAKER

"

Removing the rear cover.

1. Remove t he 4 scr ew s m ar ked C, an d r e move sp eak er as s how n

in Fig. 1.

REMOVING THE FRONT AV JACK PWB

" Removing the rear cover.
" Removing th e rear MAIN PW B .
"

Removing the FRONT CONTRO L PW B

1. R em ov e th e 2 s crews m ar ked D.

2. Remove th e FRONT AV JACK PWB.

CHECKIN G THE PW BOARD

To c h ec k the back s i de of th e PW B oard.

1) Pu ll o ut th e PW B oar d. (Ref er to REMOV ING THE MA IN
PWB ) .

2) Er ect th e PW B oar d ve rt ic ally so t ha t you c an easi l y ch eck
th e back s i de of th e PW Board.

[CAUTION]

" When erecting the PW Board, be careful so that there will be no

contacting with other PW Board.

" Be fore tur n ing on po wer , ma ke sur e t ha t the wire co nn ecto r i s

prop er l y con nected .

" W hen condu cti ng a ch eck w i th p ower su ppli ed , b e sure to c onfirm

th at t he CRT E AR T H WI RE (B RAIDED AS S’Y) is co nne c ted t o
th e C R T SOC KE T PW b oard.

WIRE CLAMPIN G AND CABLE T Y ING

1. Be sure t o cl a mp th e wir e.

2. N ever r em o ve th e cable ti e u sed f or t ying the wires to ge the r.
Should it be inadvertently removed, be sure to tie the wires with
a n ew c able tie.

REMOVING THE HP JACK PWB

" Removing the rear cover.
"

Rem oving th e MAIN PW B

1. R em ov e th e 1 s crews m ar ked E .

2. Remove the HP JACK PWB

6

No.51998

A

V21BJ8ENS

A

S

A

S

A

S

V21BJ8EP
V21BJ8EE
V20BJ8EE

(×5)

A

REAR COVER

(×1)

B

MAIN PWB

HEADPHONE JACK PWB

SP EAKER

CRT

E

(×1)

C

(×4)

D

(× 2)

FRONT AV PWB

C

(×4)

SP EAKER

FRONT CABINET

Fig. 1

No.51998

7

A

V21BJ8ENS

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A

A

V21BJ8EPS
V21BJ8EES
V20BJ8EES

REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating for more than 3 seconds.

2. Do n ot ru b t he el ect ro des an d t he r esist p arts of the p att er n.

3. W hen rem oving a c hi p par t, m el t th e s older ad equate ly.

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

! SOLDERING IRON

1. Use a hig h i ns ulatio n s older i ng iron with a t hin poin ted end of it.

2. A 3 0w s older ing i r on is r ecommend ed for easil y r em oving p ar ts.

!

REPLACEMENT STEPS

1. How to remove Chip parts

####

Resi st o rs, capacitors , etc

(1) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt the s ol de r at eac h end.

(2) Sh if t with tweeze rs and r em ove th e c h i p p art.

#### Tran s istors, diodes , varia bl e res ist or s, et c

(1) Ap pl y e xt ra so ld er to eac h le ad .

SOLDE R SOLDE R

2. How to install Chip parts

####

Resi st o rs, ca pacit ors , etc

(1) Apply solder to th e patt ern a s i ndicated in the fi g ure.

(2) Gr asp t he ch ip p art with tw ee z er s and pl ac e it on th e s old er.

The n hea t and me lt th e so lder a t both ends of t he chi p part.

#### T rans isto rs, d io des , va ria bl e r esist or s, etc

(1) Apply solder to th e patt ern a s i ndicated in the fi g ure.
(2) Grasp the ch ip p art wit h t weeze rs and p lace it on the s o l der .

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

A

(2) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt th e sol d er at each le ad . S hi ft an d r em ove the
chip part.

(4) The n solder le ads B and C .

Note : A fte r re moving t he part, r emove rem ain ing solder fr o m the

pattern.

8

No.51998

C

A

C

B

B

A

A

S

A

S

A

S

MEMORY IC REPLACEMENT

VALUE
VALUE

ITEM

ITEM
MENU

FUNCTION

1. Memory IC

This model use a memory IC.
Thi s me mo r y I C st or es d ata for pr op er op er ati o n of the vid eo

an d d ef lecti on c ircu it s.

When replacing, be sure to use an IC containing this (initial
valu e) data.

2. Memory IC rep lacemen t procedure

(1) Power off

Switch of f t he p ow er an d dis con nec t th e power co rd from
the wall outlet.

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

SE RVICE MENU

Fig.1

(2) Replace the memory IC

Init ial value m ust be entered into the n ew IC .

(3) Power on

Connect th e pow er c or d t o the wa ll o utlet an d s witc h on t he

power.

(4) SERVICE MENU setting

1) Pr ess MENU key an d, while th e di spla yed M ENU

screen, press 4, 7, 2, 5 key on th e rem ote co ntrol uni t.

2) The SER V ICE M ENU sc r ee n of F i g.1 is d isp l ay ed .

3) Ve rif y what to s et i n th e SER V ICE M EN U , and set
what ever is nec e s sary (Fig.1 ). Ref er to th e SE RVICE
ADJU STM ENT for settin g.

4) Press the MENU key t o exit SERVICE MENU.

(5) Rec eiv e channel setting

Refe r to the OPERATIN G I N STRUCTIO NS ( USER ’S

GUID E) a nd set th e rece ive ch an nel s (Chan n els Pr eset ) as
described.

(6) User se tt ing s

Check th e us er s ett ing it ems ac c ordi ng to aft er pa ge .

Wher e th ese d o not a gr ee, r efer to t he OPE RAT ING
INSTRUCTIONS (USER’ S GUIDE) and set th e items as
described.

SERVICE MENU SELECT KEY

POWER

NUMBER

SELECT(▲)

SELECT(－)

SELECT(＋)

SELECT(▼)

Fig.2

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SETTING OF THE LAST MEMORY FOR SHIPMENT

■■■■ USER SETTING VAL UES

Setting Item Setting Value Setting Item Setting Value

SOUND MENU FEATURE MENU

VOL UME 09 SLEEP TIMER OFF

AV L NO C HI LD LO CK OFF

PICTURE MENU LANGUAGE ENGLISH

BRIGHT NES S

COLOUR

CONTRAST

SHAR PNES S

HUE (only NTSC)

Defa ul t v a lu e : 31(all)

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SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION

1. You ca n ma ke t he ne ce ssa ry ad ju st me nts for t h is un it wit h
either the Remote Control Unit or with the adjustment tools

and parts as given below.

2. Adjustment with the Remote Control Unit i s made on the

basis of the initial setting va lues, however, the new setting
values which set the screen to its opti mum condition may

differ f rom the init ia l s ettings.

3. M ake sure t hat AC p ower is tu r ned on c orrec tly.

4. T ur n on the power for set an d test eq uip me nt bef or e use , and
start t he ad justmen t p roced ur es aft er w ai ti ng at least 30 minut es.

5. U nl ess o the r wise s pec if i ed, prep are t he most s u it able recep tion
or inp ut sign al for adjust ment.

6. N ever t ouch a ny a dj ust me nt p art s whi c h ar e n ot spec ified in th e
list for t his adjustment - variable resistors, transformers,

condensers, etc.

7. Pr esetti ng before ad j ustm en t.

Unl es s ot her w i se spec if i ed i n t he adjustme nt i nstr uct i ons , p r ese t

th e f ollo w ing f uncti ons with th e re mo te c ont ro l un it :

BRIGHT NES S

CONTRAST
COLOUR

SHAR PNES S

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

CENTER

ADJUSTMENT EQUIPMENT

1. DC voltmeter (or digital voltmeter)

2. Si gn al g en erat or (P atter n g en erat or) ［PAL/SECAM/NTSC］

3. Remote control unit

MAIN PARTS LOCATIONS

TOP

ADJUSTMENT ITEM

!

SCR EEN A DJ UST MENT

! IF AD JU STM EN T
!

OSD HORIZONTAL ADJUSTMENT

! AGC A UTO MATI CALLY A DJUSTM EN T
! DEFLECTION CIRCUIT ADJUSTMENT
!

WHITE BALANCE ADJUSTMENT

FRONT

TOP

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BASIC OPERATION SERVICE MENU

■■■■ HOW TO ENTER THE SERVICE MENU

1) Pr ess the MENU key.

2) MENU sc re en of Fi g .

3) MENU sc re en of fig.1 w ill b e di spla yed

MENU SCRE EN

MENU

SOUND
PICTURE
FEATURE

INSTALL
PROGRAM

Fig.1

4) While th e M EN U scr ee n is d is played , press the 4,7,2 ,5 k ey a nd th e

SERVICE MENU screen of (Fig.2) will be displayed

SE RVICE MENU

NUMBER key

V ke

REMOTE CONTROL UNI T key NAME

STANDARD
key

COLOUR key

MENU key

FUNCTION
ke

ADJUSTMENT ITEM

Fig.2

SETTING VALUE

■ SELECTION OF ADJUSTMENT ITEMS

1) En ter th e SERVICE MENU

2) Press the F UNCTION / key and s elect th e ADJU STM ENT ITEM .

3)

Press the FUNCTION / ke y an d s et t he SETTI NG VALUE.

■ HOW TO EXIT SERVICE MODE

1) Press the MENU Key on REMOTE CONTROL UNIT.

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ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

ADJUSTMENT
ITEM

OSP HORIZONTAL P OSI TION OF OS D 064

IF1 IF COARSE ADJUSTM EN T 001

IF2 IF FINE ADJUSTMENT 076

IF3 IF COARSE ADJUSTM EN T FOR L- P RI ME 003

IF4 IF FINE A DJUSTMENT FOR L-PRIME 063

AGC AUTOMATIC GAIN CO NT ROL 033

VLIN VERTICA L L INEARITY 044

VS 1A VE RTICA L S IZE f or 50 HZ / 4:3 037

VS 1B VE RTICA L S IZE f or 50 HZ / 16:9 059

VP 1 VE RTIC A L PO SITIO N for 5 0H

HP1 HORIZONTAL POSI TION for 50H

VS 2A VE RTICA L S IZE f or 60 HZ / 4:3 008

VS 2B VE RTICA L S IZE f or 60 HZ / 16:9 037

VP 2 VE RTIC A L PO SITIO N for 6 0H

HP2 HORIZONTAL POSI TION for 60H

RGBH RGB MODE HORIZONTAL SHIFT OFFSET 031

WR WHITE POINT ADJUSTME NT FOR RE D 040

WG W H IT E PO INT ADJUSTME NT FOR GREEN 04 0

WB W H ITE PO INT ADJ USTME NT FO R BLUE 04 0

BR BIA S FOR RED 031

BG BIA S FOR G RE EN 031

AP R AUT OM ATIC RGB PEAK R EGU L AT ION THR ESH OL D 01 0

FMP1 F M PRESCA LER WHEN AV L IS OF F 00 9

NIP1 NICAM PR ESCA LER WHEN A VL I S OFF 02 0

SCP1 SCAR T P RESCALER WHEN AVL IS O FF 01 3

FMP2 F M PRESCA LER WHEN AV L IS ON 01 3

NZP2 FM PRESC A LER W HEN AV L IS ON 016

SCP2 FM PR ESCA LER WHEN AV L IS ON 01 3

F1H HIGH BYTE OF VHF1-VHF3 CROSS-OVER FREQUENCY 00 00 1001

F1L LOW BYTE O F VHF1- VHF3 C ROSS -O VER FREQ UE NCY 10 01 0010

F2H HIGH BYTE OF VHF3-UHF CROSS-OVER FREQUENCY 0001 10 11

F2L LOW BYTE O F VHF3- UHF CR OS S-OVER FR EQ UE NCY 10 00 0010

BS 1 BA ND SW ITCHING B YTE FOR V HF1 00 00 0011

BS 2 BA ND SW ITCHING B YTE FOR V HF3 00 00 0110

BS 3 BA ND SW ITCHING B YTE FOR U HF 10 00 0101

CB CONTROL BYTE 10 00 1110

OP1 PERIPHERAL OPTIONS 01 10 1101

OP2 RECEPTION STANDARD OPTIONS 0101 1000

OP3 VIDEO OPTI ONS 1111 01 01

OP4 TU FEATURRES 01 10 1011

OP5 C HANNEL TA BLES 11 01 1011

TX1 TELE TEXT OPTIONS 00 00 0110

DESCRIPTION INITIAL VALUE

Z

Z

Z

Z

00 8

03 5

01 3

02 3

DO NOT ADJUST

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ADJUSTMENTS

■■■■ SCREEN ADJUSTMENT

Item

SCREEN
adjustment

■■■■ IF ADJUSTMENT

Item

IF adjustment Remote

Measuring

instrument

Remote
control unit

Measuring

instrument

control unit

Test point Adjustment part Description

SCREEN VR
[On the FBT]

Test point Adjustment part Description

IF 1
IF 2
IF 3
IF 4

1. Enter SERVICE MENU.

2. Press YELLOW key to disable vertical scan.

3. Adjust SCREEN VR. on the FBT for a thin horizontal line like a
figure.

4. Press YELLOW key again to enable vertical scan.

5. Press MENU key to leave service menu.

1. Enter SERVICE MENU.

2. Select IF 1 with FUNCTION ( / ) key

3. Press BLUE key during IF 1 is highlighted, IF 1 and IF 2 values
are adjusted automatically by software.

4. If the standard is L-prime, IF 3 and IF 4 values are adjustment
automatically when BLUE key is pressed during IF 1 is
highlighted.

■■■■ OSD HORIZONTAL POSITION ADJUSTMENT

Item

HORIZONTAL
POSITION OF
OSD
adjustment

Measuring

instrument

Remote
control unit

X

Test point Adjustment part Description

OSD

SERVICE MENU SCREEN

Screen size

1. Enter SERVICE MENU.

2. Select OSD with FUNCTION ( / ) key

3. Adjust the OSD horizontal position with the FUNCTION ( / )
key, which shifts the reference bar on the bottom of the
SERVICE MENU horizontally, so that the OSD is positioned on
the screen center. (X=X’)

Reference ba

’

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■■■■ AGC AUTOMATICALLY ADJUSTMENT

S

Item

AG C

AUTOMATIC­AL LY

adjust me nt
& check

Measuring
instrume nt

Remote

control unit

ERVICE MENU SCREEN

Test point Ad justment part Description

AG C 1. Enter SE RVICE MENU .

■■■■ DEFLECTION CIRCUIT

Item

VERT ICAL

LINEARITY
adjust me nt

Measuring

instrume nt

Signal

generator

Remote
control unit

Test point Ad justment part Description

VLIN 1. Receive a PAL B/G circle pattern.

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

2. Receive a 60dBμV RF signal level.

3. Selec t AG C fr om SE RV IC E MENU.

4. Press BLU E ke y on th e r em ot e co ntr ol unit.

5. Then the adjustment will be done automatically by software.

6. Se e the A GC i nd ic ato r on SERVI CE MENU, i t m us t be “ 1” .

7. Check th at p ict ure i s nor m al a t 90dB μV signal level.

:11

IF INDICATOR AGC INDICATOR NONE

2. Enter SE RVICE MENU .

3. Select VLIN w ith the FUNCTION ( / ) key.

4. Adju s t VL IN with t he FU NCTION ( / ) key un til c ircl e as
roun d as p ossi bl e.

5. Pr ess the ME NU key a nd m em or iz e the s et va l ue.

VERTICAL

SIZ E
adjust me nt

(50Hz, 4: 3)

very close

Scr e en

size

very close

Signal

generator

Remote
control unit

VS1A 1. Recei v e a PAL B /G ci r c le p att ern of ve rti ca l fr equ enc y 5 0Hz.

2. Enter SE RVICE MENU .

3. Select VS1A wi th th e FUNCTION ( / ) key.

4. Adjust VS1 A with th e FUNCTION ( / ) key until h orizo nt al
blac k lines on b oth the upp er a nd l ow er p art of th e ci r cle

pattern become very close to the upper and lower horizontal
si des of pictu re size a nd ne arl y ab ou t to di sa pp ear.

5. Check and read ju st VS 1A ite m i f t he adjustmen t b ec om es
imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

Picture

size

10 0%

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Item

VERTICAL

SIZ E
adjust me nt

(50Hz, 16 :9)

16 :9

format

screen

size

VERTICAL

POSITION
adjust me nt

(50Hz)

Measurin

instrume nts

Signal

generator

Remote
control unit

16:9 S CREEN

Signal

generator

Remote

control unit

Test point Ad justment part Description

VS1B 1. R eceiv e a PA L B/G cr oss-h atch p att er n of ver ti c a l f requ enc y

50 Hz.

2. Enter SE RVICE MENU .

3. Select VS 1B with the FUNCTION ( / ) key.

4. Press GREEN key to switch to 16:9 screen mode.

5. Adjust V S1 B with t he FUNCTION ( / ) key until the s creen
become 16:9 format.

6. C heck a nd re adj us t VS1 B i tem if th e adj u s tm ent be comes
imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

Picture

size

10 0%

VP 1 1. Recei v e a PA L B/G c i rc le patt er n s i g nal of vert ic al f re qu enc y

50 Hz.

2. Enter SE RVICE MENU .

3. Select VP1 wi th the FU NCTION ( / ) key.

4. Adjust VP 1 with the FUNCTION ( / ) key until th e circle
pattern is vertically centered.(A=B)

5. C heck and re ad just V P1 i te m if t he ad jus tm en t bec om es

imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

A

HORI ZONTAL

POSITION
adjus tme nt

(50Hz)

16

Signal

Generator

Remote

control unit

C

B

HP1 1. Recei v e a PA L B/G ci rc le patt er n s i g nal of ver ti c al fr eq uency

50 Hz.

2. Enter SE RVICE MENU .

3. Select HP1 with the FUNCTION ( / ) key.

4. Adjust HP1 with the FUN CTIO N ( / ) key unti l the ci rcle

p attern i s h orizo ntally ce nte red.( C=D)

D

5. C heck and re ad just H P 1 it em i f the a dj ust ment bec omes

imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

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Item

VERTICAL
SIZ E
adjus tme nt
(60Hz, 4: 3)

Very clos e

Scr e en

size

Very clos e

Measurin

instrume nts

Signal
generator

Remote

control unit

Test point Ad justment part Description

VS2A 1. Recei ve a PAL B/G cr oss- h atch p att ern of verti ca l fr equ enc y

60Hz.

2. Enter SE RVICE MENU .

3. Se lect VS2A with the FUNCTION ( / ) key.

4. Ad jus t VS2 A w i th t he FUNCT ION ( / ) key unti l th e
h orizo ntal bl ac k l i nes on b ot h the u pp er a nd lower p ar t of the

circle pattern become very close to the upper and lower
h orizo ntal s id es of p icture size a nd ne arly ab out to di sap pea r.

5. Check and re adjus t VS2 A item if th e adju stment be com es
imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

Picture

size

10 0%

VERT ICAL

SIZ E

adjust me nt

(60Hz, 16 :9)

16 :9

format

screen

size

Signal

generator

Remote
control unit

16:9 S CREEN

VS 2B 1. Recei ve a PAL B/G cr oss- h atch p att ern of verti ca l fr equ enc y

60Hz.

2. Enter SE RVICE MENU .

3. Se lect VS2B with the FUNCTION ( / ) key.

4. Pr ess GREEN ke y to sw itch t o 16:9 screen m ode.

5. Adjust VS2B with t he FUNCTION ( / ) key until th e s creen

become 16:9 format.

6. Check and re adjus t VS2 B item if th e adju stment be com es

imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

Picture

size

10 0%

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Item

VERTICAL
POSITION

adjus tme nt
(60Hz)

HORI ZONTAL
POSITION

adjus tme nt
(60Hz)

Measurin

instrume nts

Signal
generator

Remote

control unit

Signal
generator

Remote

control unit

C

Test point Ad justment part Description

VP2 1. Recei v e a PA L B/G c i rc le patt er n s i g nal of vert ic al f re qu enc y

60Hz.

2. Enter SE RVICE MENU .

3. Select VP2 wi th the FU NCTION ( / ) key.

4. Adjust VP 2 with the FUNCTION ( / ) key until th e circle
pattern is vertically centered.(A=B)

5. C heck and re ad just V P2 i te m if t he ad jus tm en t bec om es

A

B

HP2 1. Recei v e a PA L B/G ci rc le patt er n s i g nal of ver ti c al fr eq uency

D

imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

60Hz.

2. Enter SE RVICE MENU .

3. Select HP2 with the FUNCTION ( / ) key.

4. Adjust HP2 with the FUN CTIO N ( / ) key unti l the ci rcle
p attern i s h orizo ntally ce nte red.( C=D)

5. C heck and re ad just H P 2 it em i f the a dj ust ment bec omes
imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

R GB M O DE

HORI ZONTAL
SHIFT

OFF SET
adjus tme nt

18

Signal

generator

Remote

control unit

E

RGBH 1. Input R/G/B circle pattern si g nal vi a video in put terminal.

2. Press AV k ey on th e re mo te co ntr ol u nit.

3. Enter SE RVICE MENU .

4. Select RGBH with the FUNCTION ( / ) key.

5. Adjust RGBH wit h the FUNCTION ( / ) key until t he circle

p attern i s h orizo ntally ce nte red.( E=F)

6. C heck an d r ead ju st RG BH it em if the a djustm en t be comes

F

imprope r aft er s om e oth er g eomet ric a djust m ents are d on e.

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■■■■ WHITE BALANCE ADJUSTM ENT

Item

WHITE

BALANCE
adjust me nt

(Low light)

Measuring

instrume nt

Signal

generator

Remote
control unit

Test point Ad justment part Description

Recommended value 04 0 040 04 0

WR

WG
WB

It em WR WG W B

1. Recei v e a bla ck & whit e sign al ( co lour of f).

2. Enter SE RVICE MENU .

3. Select WR / W G / WB with t he ( / ) key, r es pect i vely.

4. Ad just WR / W G / WB with the FUNCTION ( / ) key,
resp ecti vely, unt il th e whit e p art tu rns to pu re whit e witho ut any

other color..

V21BJ8ENS

V21BJ8EP
V21BJ8EE
V20BJ8EE

WHITE

BALANCE
adjust me nt

(Hi gh light)

Signal

generator

Remote
control unit

BR

BG

It em BR BG

Recommended value 040 040

1. Recei v e a bla ck & whit e sign al ( co lour of f)

2. Enter SE RVICE MENU .

3. Select BR / BG with th e FUNCTION ( / ) key respect ively.

4. Adjust BR / BG with th e FUNCTION ( / ) key r esp ectively
un ti l the white part of s creen m ake w hi te colo ur.

No. 51998

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No. 51998