JVC AV-21BT8EEB Schematic

AV-21BT8ENS AV-21BT8EN

B

B

B

P

AV-21BT8EPS AV-21BT8EP
AV-21BT8EES AV-21BT8EE

SERVICE MANUAL

COLOUR TELEVISION

AV-21BT8ENS / AV-21BT8ENB

AV-21BT8EPS / AV-21BT8EPB
AV-21BT8EES / AV-21BT8EEB

AV-21BT80E

AV-21BT80EP

CONTENTS

!

SPECIFICATIONS

!

SAFETY PRECAUT IONS ･･････････････

! FEATU RES･･････････････････････････
! MAIN DIFFERENCE LIST ･･････････････

･･････････････････････････ 5

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

････････････････････

････････････････････

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

･･････････････4

････････････････････････････

･･････････････5

････････････････････････････

2

!

SPECIFIC SERVICE INSTRUCTIONS

!

SERVICE ADJUSTMENTS････････････

! PARTS LIST ･･･････････････････････

★ OPERATING INSTRUCTIONS
★ STANDAR D CIRCUIT DIAGRAM ･･･････

･･･････････････････････ 21

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

････････････ 11

････････････････････････

････

････

････････

･･･････ 2- 1

･･････････････

6

1

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

No.520 54
Jul. 200 2

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

SPECIFICATIONS

Content

Item

Dimensions ( W××××H××××D ) 59 6m m× 4 46mm×4 90mm

Mass 21 .4 kg

TV RF System B/G B/G , L/L ’ B/G , D/K

TV Mode PAL PAL / SECAM PAL / SECAMColour Syst em

Video Mode PA L / SE CAM / N TSC 3 .58 / N TSC 4 .43 (E P/ EE MODEL)

PAL / NTSC 3 .58 / NTSC 4.43 ( EN MODEL)

Sound System German + NICAM

Teletext System Fast ext / Topte xt

Receiving Frequency

VHF (VL)

Intermediate Fr equency

VIF Carrier 38.9MHz (B/G , D/K , L) / 33.9MHz(L’)

SIF C ar rier 33. 4 MHz ( 5 .5MHz:B/G) / 32. 9MHz (6.0MH z:D/K ) / 32.4MHz (6.5MHz: L) / 40.4MH z (6.5MHz:L’)

Colour Sub Carrier Freq.

SE CAM 4.43MHz

Power Input AC 2 20V ～240V , 50Hz

Power Consumption 85 W (M ax.) , 2 .5W( Stand by)

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

Pictur e Tube Size Visi bl e size : 5 1cm, M eas ured dia gon ally

Hi gh Vo l t ag e 27 .7 kV

Spe ake r 5.7 cm×16cm Oval type ×2

Au dio Output 6.5 W×2

Input

S/V id eo Y : 1Vp-p Po sitive

Au di o ( L/ R) 50 0mVr ms, H i gh Imped ance

Output

Au di o ( L/ R) 50 0mVr ms, Lo w Im pe dance

Input Terminal

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

Rear Sid e AV 1 ( Vi d eo/Aud i o/R GB)

Front Side AV3 ( Vid eo/A udio)

Front Side Hea dph on e jac k (S ter e o mi ni jack 3.5 φ)Output Terminal

Rear Sid e AV 1 ( Vi d eo/Aud i o)

46 .25 MHz ～ 1 68. 25 MH z

(VH) 175.2 5MHz ～ 46 3.2 5MHz

UHF 47 1.2 5MHz ～ 86 3.2 5MHz

CATV S1-S20 , S 21-S41 & S7 5-S79 S1-S20, S2 1- S41 & S75 -S 77 S1-S20 & S 21-S41

PAL 4.43MHz

NT S C 3.58MHz / 4.43MHz

Vide o 1Vp-p, 75

C : 0 .2 86Vp-p

Vide o 1Vp-p 7 5Ω

AV 2 (Vid eo/A udio/S-VHS)

AV 2 (Vi d eo/A ud io) (S el ect ed T V,A V1 or AV3)

AV - 21 BT8 EN S

AV - 21 BT8 EN B

Ω

AV- 21 BT8 EPS

AV- 21 BT8 EPB

AV - 21 BT8 0EP

AV- 21 BT8 EES

AV- 21 BT8 EEB

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

2

No.52054

A

B

A

B

A

B

A

P

■■■■21-pin Euro connector (SCART socket) : AV-1 / AV-2

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

V-21BT8ENS AV-21BT8EN

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

V-21BT80E

Pin No.

1

2

3

4

5 GND (B) ○○

6

7

8

9 GND (G) ○○

10 SCL3 NC NC

11

12 SDA3 NC NC

13

14

15

16 Ys input Low : 0 - 0.4, High : 1 - 3V, 75Ω○NC

17

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 ○○

AUDIO L input 500mVrms(Nominal),

B in pu t

FUNCTON SW

(SLOW SW)

G in put

GND (R)

GND (YS) ○○

R / C input

GND(V IDEO output)

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

70 0m V

R : 700mV

C : 300mV

1V

P- P

1V

P- P

Ω○NC

, 75

B- W

, 75Ω○

B- W

Ω

, 75

B- W

, 75Ω

P- P

(Nega ti ve g oi n g s ync ), 75

(Nega ti ve g oi n g s ync ), 75

Ω○

Ω○ ○

(TV OUT)

○○

○

(TV OUT)

○○

○○

○○

○

(only R )

○○

(TV)

AV - 2222

○

○

NC

○

○

[Pin a ssignment]

No.52054

3

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

SAFETY PRECAUTIONS

1. The d esign 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 c han g es sh ould b e made to the o rig 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 u sed in th e origin 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 pers o nn el
on ly.

2. Al te rati on s of the desig n or circui tr y of t he prod ucts sh oul d not be
made. Any design alterations or additions will void the
manu fac t urer 's warra nt y and w i ll f ur th er r el i eve t he ma nufac tu rer
of r esp onsib ili ty for per s o na l injur y or p r op erty dam ag e resul t ing
th erefr om.

3. Man y electr ical an d m ech ani ca l p ar ts in the pr od uc ts ha v e
special safety-related chara cteristics. T hese characteristics are
oft en no t e vi den t f r om visua l i ns p ec ti on nor ca n t he pro tect ion
aff orde d by th em nece ssarily be ob tain ed b y u s in g r ep l acem en t
com po nents rated for hig he r vo l tag e, watt ag e, etc . R ep lac em en 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 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 par ts list of Servi ce man ual m ay

cause shock, fire, or other hazards.

4. Don't s hort between the LIVE side 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 s h ow n by t he LI VE : (") side GND, the
ISO LATE D(N EU TRAL) : ( #) side GND an d EA RTH : ($) side
GND. Don't short between the LIVE side GND and

ISO LATE D(N EU TRAL) si de GND or EAR TH sid e GND an d
n ever mea sure w it h a mea sur i ng appa r atus ( osci l lo scop e etc.)
th e LI VE sid e GN D an d IS OL ATED( NE UTR AL ) sid e GN D or
EARTH sid e GND at th e 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 ke d or adj u s te d (Se e
ADJUSTM ENT OF B 1 POWE R SUPPL Y) .

6. The high vol ta ge app lie d t o th e pi ctu r e tu be mu st con form wit h
th at sp ecifi ed i n S ervi ce m an ual . E xc essi ve h i gh vo lt ag e ca n

cau se an i ncr e as e i n X- R ay em iss i on , arci ng and 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 , rem ove t he AC pow er

immed iate l y and de ter m i ne th e ca use b y vis ua l insp ect ion
(incor r ec t in stal l at ion, cr acke d or mel te d hi gh volt age har n ess,
p oor so ld er i ng, et c.) . T o m ai nt ain the p r ope r mi n im u m l e v el of
sof t X- R ay em iss i on, c omp on en ts in th e hi gh v ol tag e cir cuitry
incl ud i ng t he pict ure tu be must be t he exac t r ep lac em e nts or

alte rn at ives ap pr ove d b y th e manuf act urer of th e c om pl et e
prod uct.

7. Do n ot c hec k high vol t age b y drawing an ar c . U se a high volt ag e
meter or a hig h v oltag e prob e wit h a VT V M. Dis char g 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 ec ti 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 th e or i gina 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 ci r cuit h as occu rre d,
th os e co mpon ent s tha t indica te evide nce of ov e r hea ting sho ul d

b e r e place d. A lways u s e th e manuf act ur er 's r ep l acemen t
components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

Af ter r e- ass embl in g th e p r oduct, 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 di o i npu t and outpu t t ermi n als, Con trol k n obs ,
metal cabinet, screwheads, earphone jack, control shafts, etc.)
to be su re th e p r oduct 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 A C pr im a ry ci rcu it an d al l me tal p ar ts
exp osed t o the us er, p arti cularly an y expos ed met al p art hav i ng 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 sec ond.

(. . . . W it hstan d a v o lt age of 110 0V AC (r .m. s.) to an ap pl i anc e

rate d up to 12 0V , an d 3 00 0V AC (r.m. s .) to an ap pli an ce r at ed
200V or more, for a period of one second.)
This meth od of test r equi res a t est 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 irect ly into th e AC ou tl et ( do n ot us e a lin e
isol ati o n transf or m er du rin g this ch eck.). U sin g a " Lea k ag e

Current T este r" , me as ur e the l ea kag e cu rre nt f rom eac h ex p os ed
metal p ar t of the ca bine t, p art icularly any e x pos ed me tal p art
h aving a re turn path to t he 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 curren t m us t 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 exce ed 0.2 mA AC
(r.m.s.).

"""" Alte rn at e Che ck M ethod

Plug th e AC l in e c ord d irect ly into th e AC ou tl et ( do n ot us e a lin e
isol ati o n tran sfor m er dur i ng t hi s che ck.) . Use an AC vo lt me ter

h aving 1 00 0 oh ms pe r vol t or more sens it i vity i n th e fo llowing
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 w i th th e AC vo l tm eter. Move th e r es i stor
con nec tion to e ach exp ose d metal part, p art i cularly any exp osed

metal p ar t havi n g a r etu rn pat h to the ch assi s, an d m eas u 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 volt ag e me as u re d
must no t e xc eed 0 .7 5V AC (r.m.s.) . This c orre sponds 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.52054

A

B

A

B

A

B

A

P

FEATURES

(

)

(

)

V-21BT8ENS AV-21BT8EN

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

V-21BT80E

1. It is a remote controlled color television.

2. 10 0 pr og r am s fr om VHF , UH F b an ds or cab l e cha nn el s can be

pres et.

3. It c an tun e c abl e c ha nn els.

4. Cont ro l lin g th e TV i s ver y easy by its men u driven s yst em .

5. It h as two Eur oc on nect or s ock ets f or e xter n al d evi ce (su ch as
vi de o reco rder , vid eo games , a udi o s et, etc.)

6. Fr ont AV Inp ut avai l a ble.

7. St ereo s ound s ys tems ( Ger m an + N ic am) a re a vailab le .

8. Full functio n Tele text (Fa ste xt , Topte xt).

9. It is possib l e to con nec t h ead ph one.

10. Direct channel access.

11 . APS (Aut omat ic P r ogr am m i ng Syste m).
12 . All pr og r ams ca n b e nam ed .
13 . Forward o r bac kw ard au to ma ti c tu ning .

14 . Sl ee p timer.

15. Child Lock

16 . Au tom at ic sou nd mute when no tran smiss i on .
17 . 5 minu tes aft er the br o adc as ti ng (c l osed own), the TV s witc h es

itsel f aut omati ca lly t o st and- by m od e.

MAIN DIFFERENCE LIST

Model Name

!!!!

Part Na me

MAIN PWB VE-20101111 VE-20101105 VE-20101103

! I NSTRUCTION BOOK VE-50028252 VE-50028287 VE-50028323

!

FRONT CABI NET

!

REAR COVER

!

LENS VE-20056445

!

RATING LABEL

CAR TON BOX

AV -2 1 B T 8 EN S
AV -2 1 B T 8 EN B

VE-20073594(ENS)
VE-20068238(ENB)

VE-20079486(ENS)
VE-20101109( ENB)

VE-20101398(ENS)
VE-20101401(ENB)

VE-50028257(ENS)
VE-50028260(ENB)

AV -2 1 B T 8 EP S
AV -2 1 B T 8 EP B

AV-2 1BT80E P

VE-20073594(EPS)
VE-20068238(EPB)
VE-20073594(EP)

VE-20079486(EPS)
VE-20101109( EPB)

VE-20079486(EP)

VE-20056445

VE-20096121(EP)

VE-20101557(EPS)
VE-20101554(EPB)
VE-20101551(EP)

VE-50028295(EPS)
VE-50028292(EPB)

VE-50028289(EP)

EPS/EPB

AV -2 1 B T 8 EE S
AV -2 1 B T 8 EE B

VE-20073594(EES)
VE-20068238(EEB)

VE-20079486(EES)
VE-20101109(EEB)

VE-20056445

VE-20101656(EES)

VE-20101601

VE-20101658(EEB)

VE-20101654(EEB, POLAND)

VE-50028329(EES)
VE-50028330(EEB)

EES, POLAND

CABINET COLOUR

Mo del Name

FRONT CABINET & R EAR C OVER LENS

AV-2 1BT8 ENS
AV-2 1BT8 EPS

SILVER BLACK

AV-2 1BT8 EES
AV-2 1BT8 ENB

AV-2 1BT8 EPB

BLACK BLACK

AV-2 1BT8 EEB

AV-2 1B T8 0E P

SILVER SILVER

No.52054

5

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unp lu g t he po we r c ord.

2. Remove th e 5 screws marked A as shown in t he F i g. 1.

3. W i thdr aw t he rear co ver to wa rd y ou .

REMOVING THE MAIN PWB

" Removing the rear cover.

1. Sl i ght ly r aise t he bo th sid es of th e ch assi s b y h and and w i thd 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. Rem ove t he 4 scr ews m ar k ed B, an d re mo ve sp ea ker as s hown
in Fig. 1.

2. Rem ove the sp eake r .

REMOVING THE FRONT AV PWB

" Removing the rear cover.
" Removi ng the MAIN PWB.

1. Remove the 2 scr ew s mar ked C.

2. Rem ove the FR ON T AV PW B.

CHECKIN G THE PW BOARD

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

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

2) Erec t th e PW B oar d vert ic ally so t ha t you c an easily ch eck
th e bac k s i de of th e PW B oard.

[CAUTION]

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

con tact ing with ot her PW Boar d.

" Be for e tur n ing on po wer , ma k e sure t ha t the w i re co nn ec to r is

prop er l y con nected .

" When condu cti ng a check with p ow er s u ppl i ed , be s ur e to c onfi r m

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

WIRE CLAMPIN G AND CABLE T YING

1. Be sure t o clamp th e wir e.

2. Never rem o ve th e cable ti e u sed f or t ying th e wires to ge ther.
Sh oul d it be i n adve rt ent l y rem ov e d, b e su r e to tie th e wir es wit h
a n ew c able tie.

REMOVING THE HEADPHONE PWB

" Removing the rear cover.
"

Removi ng the MAIN PWB.

1. Remove the 1 scr ew m ar k ed D.

2. Remove the HEADPHONE PWB.

6

No.52054

A

V-21BT8ENS AV-21BT8EN

B

A

B

A

B

A

P

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

V-21BT80E

(× 5)

A

CRT

REAR COVER

MAIN PWB

FRONT AV PWB

C

(× 2)

B

SP EAKER

(×4)

HEADPHONE PWB

(×1)

D

B

(×4)

SP EAKER

FRONT CABINET

Fig. 1

No.52054

7

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

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 the r esist p arts of the p att ern.

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

4. Do n ot r euse a ch ip p ar t afte r re mo ving 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 ecomm end 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 igur e, pu sh th e pa rt w i th tw ee zer s and

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

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

#### Tran s isto rs, dio d es , va ria bl e r esist or s, etc

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

SOLDE R SOLD E R

2. How to install Chip parts

####

Resi st o rs, ca pacit o rs , etc

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

(2) Gr asp the c h i p p art with tw ee z er s and pl ac e it on th e sold er.

The n hea t and me lt th e so lder a t b oth ends of t he chip part.

#### Trans ist ors, diodes , va ria bl e r esist or s, etc

(1) Apply solder to th e p att 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 lder.

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

A

(2) As sh own in the f igur e, pu sh th e pa rt w i th 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 ov e the
chip part.

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

Note : A fte r re moving t he part, remove remain ing solder fr o m the

pattern.

8

No.52054

C

A

C

B

B

A

B

A

B

A

B

A

P

MEMORY IC REPLACEMENT

VALUE
VALUE

ITEM
MENU

MU T I NG

INFORMATION

COLOUR k

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 erati o n of the v id eo

an d d ef lecti on c i rcu it s.

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

2. Memory IC replacement procedure

(1) Power off

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

(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 cord t o t he wa ll o ut le t and s witc h on t he

power.

V-21BT8ENS AV-21BT8EN

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

V-21BT80E

SE RVICE MENU

Fig.1

SERVICE MENU SELECT KEY

(4) SERVICE MENU setting

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

screen, press 4, 7, 2, 5 key on th e rem ote co ntr ol u nit or
press MUTING key and INFORMATION key at the

simult aneously.

2) The SER V ICE MENU scree n of Fig.1 is d isp l ayed .

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 RVIC E
ADJU STM ENT for settin g.

4) Press the STANDARD key to exit SERVICE MENU.

(5) Rec eiv e channel settin g

Refe r to the OPERATIN G I N STR UCTIO 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 RATING

INSTRUCTIONS (USER’S GUIDE) and set the items as
described.

ITEM
SELECT(▲)

SELECT(－)

FUNCTION

POWER

NUMBER

STANDARD

ey

SELECT(＋)

SELECT(▼)

Fig.2

No. 52054

9

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

SETTING OF THE LAST MEMORY FOR SHIPMENT

■■■■ USER SETTING VAL UES

Setting Item Setting Value Setting Item Setting Value

SOUND MENU FEATURE MENU

BA LANCE CEN TER SLEEP T IME R OFF

BA SS

↑

CHILD LO CK OFF

TR EBL E

MODE STEREO AV-2 OUTPUT TV

EFFECT OFF

PICTURE MENU INSTALL

BRIGHTNESS PROGRAMME

CONTRAST BAND

COLOUR CHANNEL

SHAR PN ES S SE ARCH

HUE (only NTSC)

PICTURE MODE AUTO STO RE

Thes e ad j us t a re aut om atic a ll y

restore d when AP S b it in Se rvice

menu i s set .

The proc edure f or s e tti ng AP S

bit is described bellow.

↑

LANG UAGE ENGL ISH

Refe r to t he INSTRUCTI ON

BOO K

FINE TUNING

■ SETTING APS BIT IN SERVICE MENU

1) En ter s er vice me nu in TV m ode by pr essi ng “IN FOR MA T ION” a nd “ M UTI NG” ke ys s i mu l tan eously. S er v ic e Men u will ap pea r.

2) Se le ct TX1 (TEL ET EXT OPT IO N) b y press i n g U p /Dow n k eys o n rem ot e c ontr o l un it.

3) Press the 7 key on remot e control unit to set APS bit . (After this, bit 7 of TX1 will be “1”)

4) Press STANDARD key on remote control unit to exit s ervice mode.

NOTE : DO NOT TURN OFF THE TV BY USING POWER BUTTON O N THE FRO NT PANEL.

10

No. 52054

A

B

A

B

A

B

A

P

SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION

1. You ca n ma ke t he ne ce ssa ry ad ju st me nts f or this u nit with
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 optimum condition may

differ f rom the init ia l s ettings.

3. Make 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 ui p me nt bef or e us e , and
sta rt t he ad justmen t p roced ur es aft er w ai ting at least 30 minut es .

5. U nl ess o the r wise s pec if i ed, prep ar e t he most su itab le r ecep ti on
or inp ut sign al for adjust ment.

6. N ever t ouch a ny a dj ust me nt p art s whic h are n ot spec if ied in th e
list for t his adjustment - variable resistors, transformers,

condensers, etc.

7. Pr esetti ng before ad j us tm en t.

Unl es s ot her w i se spec if i ed i n t he a djustme nt i ns tr uc t ions , p r ese t

th e f ollo w ing f uncti ons w ith th e re mo te c ontrol un it :

BRIGHT NES S

CONTRAST
COLOUR

SHAR PN ES S

V-21BT8ENS AV-21BT8EN

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

V-21BT80E

CENTER

ADJUSTMENT EQUIPMENT

1. DC voltmeter (or digital voltmeter)

2. Sign al g en erat or (P attern g en erat or) ［PA L/SE CAM/NTSC］

3. Remote control unit

MAIN PARTS LOCATIONS

FRONT

FRONT AV PWB

SI DE

ADJUSTMENT ITEM

!

SCR EEN A DJ UST MENT

! OSD HORIZONTAL POSITION ADJUSTMENT
!

IF AD JU STM EN T

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

GEO MET R Y MENU ADJ UST MENT

! WHITE BALANCE ADJUSTMENT

FRONT

HEADPHONE PWB

TOP

CRT SOCKET PWB

No. 52054

MAIN PWB

11

A

V-21BT8ENS AV-21BT8ENB

A

A

A

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

BASIC OPERATION SERVICE MENU

■■■■ HOW TO ENTER THE SERVICE MENU

1) Pr ess the MENU key.

2) ME NU s c reen of fig.1 will b e d ispla ye d

MENU SCRE EN

MENU

SOUND
PICTURE
FEATURE
INSTALL

PROGRAM

REMOTE CONTROL UNI T key NAME

NUMBER key

Fig.1

3) W hile the ME NU sc r ee n is disp layed , p r es s th e 4,7 ,2, 5 ke y or

INFORMATION key and MUTING key simultaneously.

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

SE RVICE MENU

ADJUSTMENT ITEM SETTING VALUE

Fig.2

■ SELECTION OF ADJUSTMENT ITEMS

1) En ter th e SERVICE ME NU

2) Press the FUNCTION / key and select the ADJUSTMENT

ITEM.

3) Press the F UNCTION / key and s et t he SETTI NG VALUE.

■ HOW TO EXIT SERVICE MODE

1) Pr ess the STANDARD Key on REMOTE CO NTROL UNIT.

■ HOW TO ENTER THE GEOMETRY MENU

"

T hi s mo del is bu ilt- i n GEO ME TRY MENU f or ge omet ry

adjustment.

1) En ter th e SERVICE ME NU

2) Press the GREEN key, geometry menu appears (Fig. 3).

3) Press the FUNCTION / key and select the ADJUSTMENT
ITEM.

4) Press the F UNCTION / key and s et t he SETTI NG VALUE.

GEOME TRY MEN U

INFORMATION
key

AV key

" FUNC TI ON OF CO L OUR ke y

RED key :

It switch es th e AV L to ON o r OF F mode on ser vic e

menu . AV L wo rd i s visible o n s er vic e m en u when
AV L is o n.

GREE N k ey :

It s witch es t o GE OM ETR Y adjust menu. G eomet ry

of th e p ict ure i s a dj us t ed in th is menu .

YELLOW key :

It s witch es t o VE RT ICAL SCAN DISA BLE mode.
It i s us eful t o adjus t scr een volt age.

BL UE ke y :

It i s used to adj ust AGC an d I F au tom a tical l y on

ser v ice me nu.

STANDARD
key

COLOUR key

MENU key

FUNCTION
key

GEOME TRY

VSIZ 023
VPOS 028
VSCO 000

VCCO 008
HSIZ 007

HPOS 039
HPIN 015

ADJUSTMENT ITEM SETTING VALUE

Fig.3

12

No. 52054

A

V-21BT8ENS AV-21BT8EN

B

A

B

A

B

A

P

V-21BT8EPS AV-21BT8EP
V-21BT8EES AV-21BT8EE

■

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

ADJUSTMENT
ITEM

OSD HOR IZONTAL POSI TION OF OSD 082

IF1 IF C OAR S E AD JUST M ENT 004

IF2 IF FINE ADJUSTMENT 065

IF3 IF C OAR S E AD JUST M ENT FOR L-P RIME 004

IF4 IF FINE ADJUSTMENT FOR L-PRIM E 065

AGC AUTOMATIC GA IN CONT ROL Autom at ic ally

VLIN VERTICA L L INEARITY 045

RGBH RGB MODE HORIZONTAL SHIFT OFFSET 007

VSOF VE RTICA L S IZE OFFSE T for 60Hz -01

VP OF VE RTIC A L PO SITIO N OFFSET f or 60Hz -01

HSOF HORIZONTAL SIZE OFFS ET for 60Hz Not used

HPOF H ORIZONTAL POSI TION OFFSE T for 6 0Hz +00

HTOF HORIZONTAL TRAPEZOID OFFSET for 60Hz Not used

WR WHITE PO INT AD JUST MENT FOR RE D 04 0

WG WHITE POINT ADJUSTME NT FOR GREEN 04 0

WB WHITE POINT AD JUST ME NT FOR BLUE 040

BR BIA S FOR RED 030

BG BIAS FOR G RE EN 031

APR AUTOMATIC RGB P EAK REGUL ATION THR ESHOL D 010

BRI BR IGH TNES S 030

CON CONT RAST 035

COL COLOUR 038

SHR SHARP 006

HUE HUE 031

VOL VOL UME 01 5

WR-R WHITE PO INT ADJU STMENT for RED ( R GBm o de) 03 0

WG-R W H IT E PO INT ADJUSTME NT for GR EE N (RGBm o de) 055

WB-R W H ITE PO INT ADJU STMENT for BL UE (RGBmode) 032

FMP 1 FM PRES CA LER W HE N AV L IS OF F 009

NIP1 NICAM PRESCALER WHEN AVL IS OFF 020

SCP1 SCAR T PRES CA LER W HE N AV L IS OFF 013

SE C1 SE CAM PRE SCALE R WH E N AV L IS OFF 013

FMP 2 FM PRES CA LER W HE N AV L IS ON 013

NIP2 NICAM PRESCALER WHEN AVL IS ON 016

SCP2 SCAR T PRES CA LER W HE N AV L IS ON 01 3

SE C2 SE CAM PRE SCALE R WH E N AV L IS ON 013

F1H HIGH BYTE OF VHF1-VHF3 CROSS-OVER FREQUENCY 00001001

F1L LOW BYTE O F VHF1- VHF3 C ROSS -O VER FREQ UE NCY 10010010

F2H HIGH BYTE OF VHF3-UHF CROSS-OVER FREQUENCY 00011011

F2L LOW BYTE O F VHF3- UHF CROS S-OVER FREQ UE NCY 1000 00 10

BS 1 BA ND SW ITCHING B YT E F OR V HF 1 00 00 00 11

BS 2 BA ND SW ITCHING B YT E F OR V HF 3 00 00 01 10

BS 3 BA ND SW ITCHING B YT E F OR U H F 10 00 01 01

CB CON T ROL B YTE 10 00 11 10

OP1 PERIPHERAL OPTIONS 01110101

DESCRIPTION INITIAL VALUE

V-21BT80E

1/2

No. 52054

13

A

V-21BT8ENS AV-21BT8ENB

A

A

A

)

V-21BT8EPS AV-21BT8EPB
V-21BT8EES AV-21BT8EEB
V-21BT80EP

■

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

2/2

ADJUSTMENT
ITEM

OP2 REC EPTI ON STANDAR D OPTIO NS 00 00 10 01 (E N)

OP3 VIDEO OPTI ONS 011011 01 (EN)

OP4 TV FE AT U RE S 10 00 10 00

OP5 C HA N NE L TA BLES 00 00 00 00

TX1 TELETEXT O PTIONS 10 01 01 01 (E N)

GEOM GEO MET R Y OPTIO NS 0000 0000

OP8 PIP PRES ET CHAN GE 00 00 00 00

" [GEOMETRY MENU]

ADJUSTMENT
ITEM

VSIZ VE RTICA L S IZE f or 50Hz 030

VP OS VE RTICA L POSITIO N for 5 0H z 01 0

CSCO VERTICAL S-CORRECTION for 50Hz Not used

VCCO VERTICAL CORNER CORRECT ION for 50Hz Not used

HSIZ HORIZONTAL SIZE f or 50Hz Not used

HPOS HORIZONTAL POSITION for 50Hz 035

HPIN HORIZONTAL PINCUSHION for 50Hz Not used

HCCO HORIZONTAL CORNER CORRECTION for 50Hz Not used

HTRP HORIZONTAL TRAPEZOID for 50Hz Not used

VZSZ VERTICA L ZOOM S IZE f or 50 Hz Not used

DESC RIPTI ON IN ITIAL VA LUE

01 00 10 01 (EP)

00 01 1001 (EE

11 10 11 01 (EP/EE )

10 00 01 01 (EP)

10 00 11 01 (EE)

DESCRIPTION INITIAL VALUE

14

No. 52054