JVC AV-27D203/S/R, AV-27D303/S/R Service Manual

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Page 1

SERVICE MANUAL

COLOR TELEVISION

AV-27D303

AV-27D303 AV-27D203

BASIC CHAS SIS

AV-27D303 AV-27D203 AV-27D203

CONTENTS

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

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

! FEATU RES････････････････････････････････ ! MAIN DIF FERENCE LIST ････････････････････････････････ !

HOW TO IDENTIFY MOD ELS

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

SPECIFIC SERVICE INSTRUCTIONS

SERVICE ADJUSTMENTS ････････････････････････････････

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

★ OPER ATING INSTRUCTIONS ★

STAND ARD CIRCUIT DIAGRAM

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

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

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

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

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

･･･････････････････････････････････

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

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

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

････････････････････････････････

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

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

････････････････････････････････

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

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

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

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

････････････････････････････････

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

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

･････････････････････････････ 2

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

･･････････････････････････････････

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

････････････････････････････････････ 31

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

･･･････････････････････ 3

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

･･･ 4

･･････

･･･････････････････････ 5

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

････････････････････

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

･･ 6

････

･････････････

･･････････････････････････

･････････････････････ 12

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

････････････････

････････････････････････････････

2- 1

No.519 40

Apr. 2002

May 2002

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V-27D303

(

)

V-27D203

SPECIFICATIONS

Contents

Items

Dimensions (W×××× H×××× D) 29 -5/8 ”×23”-1/4”×23” (752mm×590mm ×53 1mm )

Mass 70.8 Ib s ( 3 2.2 kg)

TV System and Color System

TV RF System

Color Sy st em

Sound System

TV Receiving Channels and Frequency

VL B a nd

VH B and

UHF Band

CATV Receiving Channels and Frequency

Low Band

High B an d

Mid Band

Super Band

Hyper Band

Ul tr a B an d

Sub Mid Band

TV/CATV Total Channel

Intermediate Fr equency

Vide o IF Car rier

Sound IF Carrier

Color Sub Carrier

Power Input

Power Consumpti on

CCIR(M)

NTSC

BTS C S ystem (M ulti -Ch an nel S ound )

(02～0 6) 54 MHz～88MHz (07～1 3) 17 4M H z～21 6MHz (14～6 9) 47 0M H z～80 6MHz

(02～06, A-8) by (02～06 &0 1)

(07～13) by (07～13)

(A～1) b y (14～22)

(J～W) by (23～36)

(W +1～W+ 28) b y (3 7～64 )

(W +29～W+ 84) b y ( 65～1 25)

(A8, A4～A1) by (01, 96～99 )

18 1 C ha nn els

45 .75 MHz

41.25 MHz ( 4 .5MHz)

3.58MHz

12 0V AC , 6 0Hz

11 3W

AV-2 7D30 3/S AV-2 7D30 3/R

(54MHz～80 4MH z)

AV-2 7D20 3/S AV-2 7D20 3/R

Picture Tube

Hi gh Vo l t ag e

Spe ake r

Audio Powe r Output

Input terminal s

Input 1 S-Video

Video(V)

Au dio (L , R )

Input 2 Video

Component (V/Y, PB, PR)

Audio(L, R)

Input 3

Fr on t

Output t er minals

Antenna termina l 75 Ω(VHF/UHF) Terminal, F-Type Connector

Remote Contr ol Unit RM-C25 2 ( AA /R6/U M- 3 batt ery×2)

Video(V

Au di o(L, R

Variabl e Audio Output (R/L) More than 0～1550mVrms (+6dBs)

27 ” (6 8cm) Mea sured D iag on ally

29 kV±1kV (at zero b eam current) 2”×3 -1/ 2” (5×9cm) Oval type×2

1.2 W + 1.2 W

Y: 1Vp-p P ositive ( neg ative s ync p rovi ded , wh en terminat ed with 7 5Ω)

C: 0. 286V

1V p- p, 75Ω ( RCA pin jack)

50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack) 1V p- p, 75Ω ( RCA pin jac k) 1V p- p 7 5Ω(positive sync)

50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack)

1V p- p, 75Ω ( RCA pin jack)

50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack)

Low impedance (400Hz when modulated 100%) (RCA pin jack)

p-p

(bu rst si gnal, when t erm inate d with 75Ω)

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

No.51940

Page 3

SAFETY PRECAUTIONS

V-27D30 V-27D20

1. The desi gn of t his p ro du ct c ont ai ns spec i al h ar dw ar e, man y ci rcu its and c o mp on ent s s peci al ly for saf ety pur p oses. For continued protection, no changes should be made to the origina l des ig n u nless a uth or i zed in wri ting by t he m an ufactu re r.

Rep lacem en t par ts m ust be id ent ic al to thos e u sed in th e origina l cir cuit s . S ervic e sho ul d be per f orme d by qu ali fied p ers onnel o nly.

2. Alte r ation s of the desig n or circu i tr y of the p r odu c ts s hould n ot b e mad e. A ny de si gn al te rations o r additio ns wil l vo id th e

manufact urer's warranty and will further relieve the manu fac t urer of resp ons ib i lit y f or pe rs ona l in ju r y or p r ope rt y d am age r esult in g t heref rom .

3. M an y e l ectr ical an d mech anic al pa rt s in th e p r odu c ts h av e sp ecial s af ety-r elat ed charact eris tics. Th ese charac teri stics are

oft en not e vid en t fr om visu al in spe cti on no r can the prote c ti on aff orde d by th em neces s ar ily be obta in ed by using replac ement comp on ent s ra ted for h ig her vo l tag e, wa ttage, etc. Rep lacem en t pa rt s wh ic h have t hes e sp ec i al s afet y ch aracter istics a re i d entifi e d in th e par ts l ist of S ervic e man ua l.

Electrical components having such featur es are identified by shading on the schematics and by (!!!!) on the parts list

in S erv ice manual. Th e us e of a s u bs t itu te re pl ac emen t whi ch

does not have the same safety characteristics as the reco mmen ded replac emen t pa rt sho wn i n the pa rts l ist of Se rvi c e ma nual m ay c aus e sh ock , f ire, or o th er haz ards .

4. Use iso la t io n tr ansforme r when hot c hass is . The chassis and any sub-chassis contained in some products are c onnect ed to on e s ide of th e AC p ower li ne . An i sola ti on tr ansf or m er of ad equ ate cap acity sh ould be i nsert ed bet we en th e p rodu ct and t he AC p ower s u pp ly p oi nt while p er for mi ng

an y ser v ice on so me pr o ducts wh en th e H OT ch assis is exp ose d.

5. Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground when repairing.

So m e mod el 's p ow er circ uit i s part ly dif fer en t in t he GN D . T h e diff erenc e of t he GND is sh own by th e LI VE : (") side GND, th e ISO LAT ED(NEU TRAL) : (#) side GND an d EAR T H : ( $) si de GND. D on 't sho rt be tw ee n t he LIVE s id e GN D a nd ISO LATE D(N EU TRAL) side GND or EARTH si de GN D and never measure with a measuring ap paratus (oscilloscope etc.)

th e LI VE side GND a nd ISO LATED ( N EUTRA L) si d e G ND or EARTH sid e GND at th e s ame time. If above note will not be kept, a fuse or any parts will be broken.

6. If any re pa ir h as b ee n mad e to th e c h as sis , i t is re commend ed th at t he B1 se ttin g sh ould b e c hec ked or ad juste d (See

ADJUSTM EN T OF B 1 POWE R SUPPL Y) .

7. The hig h v olt age a pplied t o the pi ctu re tu be mu s t c o nfo rm with that specified in Service manual. Excessive high voltage can cau se an incr ease i n X-R a y emission , arcin g and pos sible com po nent d am age, th eref or e op eratio n un der excess ive hi gh

vol ta ge c ondit i ons sh ould be ke pt to a m in i mu m, or sh ou ld be preve nt ed. I f seve re arc in g oc cu rs, remove th e AC p ower immediately and determine the cause by visual inspection (incor r ec t i nsta ll a tion , crac ked o r m el te d high vol tag e har ness, p oor s olde rin g, etc. ). T o ma in ta in the prop er mi ni m um le v el of

soft X-Ray emission, components in the high voltage circuitry incl ud i ng the pi ctu r e tu be mu st be the ex a c t r ep lac em en ts or alte rn at ives a ppr o v ed b y th e ma nuf actu r er of th e co mp l ete prod uct.

8. Do n ot c hec k high volta ge by d r awin g a n arc . U s e a hi gh vol ta ge mete r or a hi gh volt age p robe with a VTVM . Disc h ar ge

th e p ictu r e tu be bef or e a tte mp ting me ter c o nne cti on , b y con nec ting a cl i p l ead to th e gr ou nd fr am e a nd c on n ecti ng t he oth er e nd of t he lead th r oug h a 10k Ω 2W resi st or to t he ano de

bu tto n.

9. W hen s e rvice is r equ i r ed, ob ser ve th e orig inal l ea d dress . Extra p r ecau ti on s h ou ld be given to ass u r e c or re ct l ea d dr es s in the hi gh volta ge c ircu it area . W her e a sh ort circui t ha s occu rr e d, th os e c ompon en ts th at i nd ic ate ev i den c e of overheating should be replaced. Always use the

manu fac t urer 's r eplace ment comp on ents.

10 . Isolation Check

(Safety for Electrical Shock Hazard)

Af ter re-a ssem bl i ng th e pr od uc t , always pe rf orm an iso l ati on ch eck on th e expo sed m eta l p ar ts of th e c abi n et ( ant en na

ter m i na ls, vide o/a ud io in pu t and out put ter mi n al s , C on trol knobs, metal cabinet, screwheads, earphone jack, control sh afts, etc.) to be s ur e th e pr o duct is saf e t o op er at e wi th out d ang er of elec t rica l shoc k.

(1) Dielectric Strength Test

The is olat ion b etwe en the AC pr i ma r y circu it and all m eta l par ts exp osed t o the us er, par t icu lar l y an y expo sed metal p art h aving a re tur n pat h to the ch as sis sh ou ld w i ths t and a volta ge of 11 00V AC ( r .m .s.) f or a per i od of on e sec ond.

(. . . . Withs tand a volta ge of 1100V A C (r.m. s.) to an applian ce

rate d up to 1 20V , and 3 000V AC ( r .m. s.) t o an appl i anc e ra ted 200V or more, for a period of one second.) Thi s m eth od of test re qu ires a t est eq uip me nt n ot g enerally fou nd in t he servi c e t ra de.

(2) Leakage Current Check

Plug t he A C li ne c or d di r ect ly int o th e AC ou tl et ( do not us e a line is olati on tra nsf ormer dur i ng this che ck.). U sing a " L eakage

Current Test er ", mea sur e t he lea kag e c ur r en t fr om each exp ose d m eta l par t of th e ca bi ne t, p ar tic ul ar l y an y expo sed metal part having a return p ath to t he ch assis , to a known good ea rt h gr o und ( wa ter p ipe, etc.) . A ny l ea kag e c ur r en t must not

exce ed 0.5m A AC ( r .m. s.) . Howev e r, in t ro pi cal a rea, this m us t not e xc eed 0 .2m A AC (r.m.s.).

"""" Alte rn at e Che ck M et ho d

Plug t he A C li ne c or d di r ect ly int o th e AC ou tl et ( do not us e a line isolation transformer during this check.). Use an AC

vol tm et er h aving 100 0 o hms per v ol t or m or e s en s i ti vit y in the follo win g ma nne r. Con nec t a 150 0Ω 1 0W resis tor pa ralle l ed by a 0.15μ F AC - typ e cap ac i tor b etwe en an ex p os e d m eta l p art and a k no wn go od earth gr ou nd (wate r pip e, et c.).

Measu re th e A C vo l tag e acr os s th e r es i st or w it h t he AC voltmeter. Move the res istor connection to each exposed m etal part, particularly any exposed metal part having a return path to

th e c h assis , an d m easur e t he A C v olta ge acr os s th e r es isto r. Now, reve rs e th e plu g i n t he A C out let a nd r ep eat e ac h measu rem ent. An y volta ge measu red m ust not exce ed 0.7 5V AC (r.m. s.) . This corresponds t o 0.5mA AC (r.m. s.). Howev e r, in trop ic al ar ea, thi s must n ot excee d 0 .3V AC (r.m.s.). This corr esp on ds t o 0 .2mA AC ( r.m.s.).

AC VOLT METER (HAVING 1000 Ω/V,

GOOD EARTH

GR OUND

11 . High voltage hold down circuit check.

Af ter r ep ai r of th e high vol t ag e h ol d down ci r cuit, th is ci rcu it sh all be c hec ked to oper ate correctly. See item "Ho w to check the high voltage hold down cir cuit".

This mark shows a fast operating fuse, the

letters indicated below show the rating.

0.15μF AC-T YPE

1500Ω 10W

OR MOR E SENSIT IVITY)

PLACE THIS PROBE ON E A C H EX PO SE D

ME T AL PA RT

A V

No. 51940

Page 4

V-27D303

V-27D203

FEATURES

New chas sis design enabl es use of a si ngl e boar d with si mp lif ied

circuitry.

User s can m ak e fun t o c onnect th e Digital Video Disk pl ay er with

the c omp onent vi deo signal i npu t terminal .

Provid ed w ith miniatu re tuner (TV/CATV ).

Mult if unct ional remote con trol p erm i ts pictu re a dj ustm ent.

Ad opti on of t he C HAN NEL GUARD fu ncti on prevents th e s pecific

chan nels from being selected, unl ess th e “ ID nu mber” is k ey in.

C bus control utilizes single chip ICs.

Adopti on of the VID EO STATUS f unction .

Adoption of the ON/OFF TIM ER fun cti on.

Built-in V-CHIP system.

With 75ΩV/U in c ommon ( F-Type) AN T Terminal.

SLEEP TIMER for setti ng in real t ime.

" "

Clos ed-caption b roa dcasts can be view ed.

Bu ilt - in MT S sys tem.

Built-in H YPER-SURROUND system.

Becau se bu ilt -in the BBE circ uit im pr oved the sound of

conver sation

S-VID EO input terminal for taking best adv antag e of Super VHS .

Variable Au di o outp ut te rminal.

" "

3 LINE Digital Comb f ilter Im proved pi c tu re q ual i ty.

No.51940

Page 5

MAIN DIFFERENCE LIST

V-27D303 V-27D203

!!!!

Parts Name

MAIN PW B SFE-10 01A -M2 SFE-10 02A -M2 SFE-10 01A -M2 SFE-10 02A -M2

ITC TU BE (C) A6 8QD N 891 X001 A6 8ADT25 X01 A6 8QD N 891 X001 A6 8ADT 25 X01

FR ONT CA BI. A SS’Y GQ1 0018- 001 B-A GQ1 0018- 002 B-A

DOOR GQ3 0024-002 A- A GQ3 0024-001 A- A

JVC M ARK CM48006 -0 07- C CM48006 -0 06- C

POW ER KN OB GQ3 0026- 002 A-A GQ3 0026- 001 A-A

CONTROL K NOB GQ3 0025- 002 A-A GQ3 0025- 001 A-A

Model name

AV-2 7D30 3/S AV-2 7D30 3/R AV -27D 203/S AV-2 7D20 3/R

HOW TO IDENTIFY MODELS

The differenc e between AV -27D 303 S and AV- 27 D3 03/ R is i n th e PIC T U R E T UBE. As t he res ul t of the diffe rence in pictu re tube, the MAIN PW B al s o dif fers.

In the sam e w ay, the d if ference betw een A V-27D 20 3/S and A V- 27D20 3/R i s in th e PICTUR E TU BE t oo.

Parts na me

Model

! RAT IN G L ABEL GQ3 003 2-001A-A

AV-2 7D30 3/S AV-2 7D303/R AV-2 7D20 3/S AV-2 7D203/R

Ind icat ed AV -27 D 303 Ind icat ed AV -27 D 303 Ind icat ed AV -27 D 203 Ind icat ed AV -27 D 203

Indic ated “S” Indic ated “S”Indic ated “R”

Indic ated “R”

No.51940

Page 6

V-27D303

V-27D203

FUNCTIONS

■■■■

FRONT PANEL CONTROL

2 3

INPUT3 VIDEO terminal VOLUME

INPUT3 AUDIO L MONO terminal REMOCON LENS

INPUT3 AUDIO R terminal ON TIMER LED

MENU button

CHANNEL -/+ buttons

OPERATE / buttons

■■■■

REAR TERMINAL

POWER button

-/+

buttons

AUD IO O UTPUT (L, R)t e rm ina ls

INPUT1 (S, V, L, R) terminals

INPUT2 (V/Y, PR, PB, L, R) terminal s

VHF / UHF terminal

No.51940

Page 7

■■■■

REMOTE CONT ROL UN IT [R M-C2 52]

⑱

⑲

②

③

④

⑤

⑥

⑦

⑧

⑨ ⑩

①

⑫

⑬

⑭

⑮

①

POWER key

INPUT key

②

DISPLAY key

③

SLEEP TIMER key

④

HYPER SUR. key

⑤

⑥

VIDEO STATUS key

⑦

THEATER PR O key

BBE key

⑧

MUTI N G key

⑨

VOL－/＋(MENU / ) keys

⑩

MENU key

⑪

CHANNEL keys

⑫

LIGHT key

⑬

V-27D303 V-27D203

⑪

⑯

⑰

V-CHIP key

⑭

CH－/＋(M ENU

⑮ ⑯

EXI T / PIP OFF key

VCR CONTROL key

⑰

VCR / DVD switch

⑱ ⑲

TV / CATV switch

NOTE

The CH- /+ k eys an d V OL- /+ key s o per ate CHANNE and VOLU M E normally.

Thes e keys are al s o used to navigate MENU

system.

▼/▲

) keys

No.51940

Page 8

V-27D303

V-27D203

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVE R

1. Disc onnec t t he po w er pl u g f rom wa ll out le t.

2. As s hown i n th e Fig .1, r em o ve th e 11 screws marked

3. As s hown i n Fig.1 , re mo ve t he 4 screws marked

4. Then r emo ve th e RE AR COVE R toward you .

""""

!!!!

CHECKIN G THE PW BOARD

To check the PW Board from back side.

1. Pull out the chassis (refer t o REMOVI NG THE MAIN PWB).

2. Erect th e chas sis ver tica lly s o th at you c an ea si ly ch eck th e bac k

si de of the PW Boar d.

REMOVING THE MAIN PWB

" After r emoving th e REAR COV ER.

1. Pick th is s i de of th e MA IN PW B an d rai se on e slig htly, take of f the

PW B stopp er m ar k ed

2. W ithdr a w t he chass is back w a rd . (If n ecess ary , r emove t he wire clam p, c onn ect ors etc.)

####

f rom th e c abi n et b ott om.

REMOVING THE SPEAKER

After removing the rear cover.

1. As shown in Fig. 1, removing the screws marked

remove the speaker.

2. Fol l ow th e s ame st eps when r em oving th e oth er ha nd sp eak er.

NOTE : When removing the screws marked

remove th e l ow er side s crew fi r st, an d th en r em ove the

up per one .

$$$$

of th e sp eak er ,

$$$$

then

CAUTION

When erecting th e ch as sis, b e car ef ul so tha t th er e w ill b e no

contacting with other PW Board.

Befor e tu rning o n p ow er , make s ur e th at t he wire con nec tor is

prop er l y con nec ted .

When conducting a check with power supplied, be sure to

confirm that the CRT EARTH WIRE (BRAIDED ASS’’’’ Y) is

connec ted to the CRT SOCKET PW board.

WIRE CLAMPIN G AND CABLE T YING

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

2. Never rem o ve th e c able tie use d for tying th e wi res together. Should it be inadverte ntly removed, be sure to tie the wir es with a

new cable tie.

No.51940

Page 9

FRONT CABINET

CRT

SP EAKER

CRT SOCKE T PWB

MAIN PWB

V-27D30 V-27D20

Thi s exp lode d view descr i be s ab out th e AV -2 7D 30 3/R and /S.

Alth ou gh t he AV -2 7D 20 3/R, /S i s sl i gh tly diff erent f r om th is fi gu re, you c an u se th e

exp lode d vie w f or d is assem b lin g t he AV27D 203/R , /S in the s ame step as for this

on e.

$$$$

HV T

SP EAKER

$$$$

####

PWB STOP PER

REAR COVER

""""

!!!!

POWER CORD

Fig .1

No.51940

Page 10

V-27D303

C BUS

)

SYS0

V-27D203

MEMORY IC REPLACEMENT

1. Memory IC

This TV uses memory IC. Thi s m em or y IC st or es d at a f or pr op er o per a tion of the vide o a nd deflectio n circui ts.

When r ep la cing the mem or y IC, be sure to use an IC co ntai ni ng this (initi a l value ) d at a.

2. Memory IC replacement procedure

(1) Power off

Switch off the p ow er an d di scon nec t th e p ow er c o rd fro m t he out let.

(2) Replace the memory IC

Be sure t o use a memory I C writte n with th e initia l s ettin g data.

(3) Power on

Con nect th e power cord to the outlet a nd s witch on th e power.

(4)Conf irm the sy st em con st an t v alu e

12 .S YSTEM (SYS ) do not adjust normally.

The adjustment should not be done without signal.

! Ho w t o ent er t he SY ST EM (SYS ).

1) Pr ess the SLEEP TIME R ke y and se t SLEEP TIMER f or 「0 min」.

2) Be fore disap pear the di spla y of S LEE P TIM ER set tings , si mu l tan eous l y

press th e DISP LAY key an d VIDEO ST A TUS ke y of the r emot e cont rol un i t.

3) The SERV ICE M ENU sc r ee n of F i g.1 is d isp layed .

4) While the SERVICE MENU is displayed, select the SYSTEM(SYS) item

wi t h ME NU ▼/▲ (CH-/+) keys, and the MENU / (VOL-/+) keys is

pressed, the scree n will be displayed as shown in Fig.2.

5) R efe r to the SY STEM ( SY STEM C ON STA NT) TAB LE 1 a nd ch eck t he

setting items. If the value is different, select the setting item with the ME NU ▼ / ▲ (CH -/ +) keys and adju st the s ett ing with th e

MENU / (VOL-/+) keys. (The letters of the selected item are

displayed in yellow.)

6) W hen adjustment has co mp le te d, t he v al ues sto re into memory IC

automat ically

7) Press the EX IT key t wice to return the normal scree n.

SE RVICE MENU

SERVICE MEN U

1.V/C(S) 2.DEF(D)

3. SOUND(A) 4 .OTHERS( F)

5.PIP(PIP) 6.3L Y/C(LYC)

7.LOW LIGHT 8.HIGH LIGHT

9.RF AFC 10.VCO

12.SYSTEM(SY

11.I2

SELECT BY OPERATE BY EXIT BY

EXIT

Fig.1

12 .SY STEM(SY S

SETTING ITEM

***

SETTING VAL UE

SETTING N o

1 VI DEO IN

Fig.2

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

Verif ied

(5) Rec eiv e channel setting

DISPLAY

Refe r to the O PERA TING IN S TRUCTIO NS ( USER'S GUIDE) an d set th e r ec e i ve ch annel s ( C ha nn els Pres et) as des cri b ed.

SLEEP TIMER

(6) User sett in gs

Check th e us er s ett ing it em s acc ording to TABL E 2. Wher e thes e do not ag r ee, ref er to th e OP ERATIN G I NSTRUC TION S

(USER'S GUIDE) an d s et t he it em s as de scrib ed.

VIDE O STA TUS

MENU /

▲

▼/

EXI T

(7) SERVICE MENU setting

Ve rif y what to s et i n th e SER VI CE MENU, a nd s et wh at ever is necessary. (Fig.1) Refer to th e SE RVIC E A DJUSTMENT f or setting.

No. 51940

Page 11

TABLE 1 (System Constant setting)

No Setting item Variabl e range

SY S01 VIDEO IN 0～4 3

SY S02 PIP 0～1 0

SY S03 3D Y/ C 0～1 0 SY S04 Y CV 0～1 0 SY S16 EZ SU RF 0～1 0

SY S05 CCD P CHK 0～1 1 SY S17 ID DISP 0～1 1 SY S06 PUR IT Y 0～1 0 SY S18 COMPU LINK 0～1 0 SY S07 VM 0 ～1 0 SY S19 CCD 0～1 1 SY S08 NOISE CR 0～1 0 SY S09 CLR TEMP 0～1 1 SY S10 TH EATE R 0 ～1 1 SY S11 TH EATE R PRO 0～1 1

SY S12 BB E 0～1 1 SY S24 CXA1 875 0～1 0

Initial setting

value

No Settin g ite m Variabl e ra nge

SYS 13 HYP S URR

SY S14 16:9 MD

SY S15 HYP S CA N

SY S20 VCH IP

SY S21 VCH IP C A

SY S22 JVC L OGO

SY S23 CMP IN

0～1

0～1 0～1 0～1 0～1

TABLE 2 (User setting)

Setting item Setting value Setting item Setting value

Use remo t e co ntrol ler ke ys

V-27D30 V-27D20

Initial setting

value

POWE R OFF DISPLA Y OFF

CHANNEL CH-02 VIDEO STATUS DYNAMIC

VOL UME 10 HYPE R S URROUND OFF

TV/V IDEO TV BBE ON

Settings of MENU

PICTURE MENU INITIAL SETUP MENU

TINT CENTER

COLO R CENTER FRONT PANELLOCK OFF

PICTURE CENTER+8 V2 CO MPONENT-IN NO

BRIGHT CENTER AUTO SHUT O FF OFF

DETAIL CENTER+10

COLO R TEMPERATURE HIGH

NOISE MUTING ON C HA N NE L S UMMARY U nn ecess ary to set

SOUND ADJUST MENU

BASS CEN TER

TR EBL E CEN TER XDS ID

MTS ST ERE O

LA NG U AGE

CLOS ED CAPTIO N OFF

AUTO TUNER SET UP AIR

V-CHI P OFF

SE T LOC K C ODE (000 0) Unn eces sary to set

ENG

CLOCK / TIMERS MENU

SE T CLOC K MANUA L

TIME ZONE : PACIFIC

D.S.T. : OFF

ON / O FF TIMER OFF

No. 51940

Page 12

V-27D303

V-27D203

SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION

1. You c an ma ke the nec es sary adjust me nts f or t his u n it wi t h

eit her t h e R emot e Co ntrol Unit or With t he adju st me nt

tools and parts as given below.

2. Ad justment wit h t he Re mote Control Unit is made on th e

bas is of t h e initial sett ing v alu es, howev er, the ne w setti n g

values which set the screen to its optimum condition may

differ f rom the init ia l s ettin gs.

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

4. T ur n on t he pow e r f or set and test equ ipm ent bef ore us e, an d

sta rt th e adjus tme nt p r oced ur es aft er wai tin g at l east 30

min ute s.

5. Unless oth er w is e spec if i ed, prep ar e the m ost s uitab le rece ptio n

or inp ut sign al for adjust m ent.

6. Never touc h an y ad ju stm en t p ar ts w hich a re n ot sp ecifi ed i n th e

list for this adjustment - variable resistors, transformers,

condensers, etc.

7. Pr es etti ng b efore adj ustm en t.

Unl es s oth er w is e spec if i ed i n th e adjustmen t i ns tr uc t ions ,

pres et t he f ollowing fu nction s with the rem ote co ntr ol u nit:

User menu preset value

MENU ITEM PRES ET VALUE

PICTURE MODE (VSM) DYNAMIC 0

BA SS, TREB LE, BA LANCE

HYPE R SURROUND

TINT, COLOR, PICTURE, BRIGHT , DETAIL

MTS

CENTER

OFF

CENTER

STEREO

ADJUSTMENT EQUIPMENT

1. DC voltmeter (or digit al voltmeter)

2. Oscilloscope

3. Si gn al g ener at or (P atter n g en erat or)［NTSC

4. Remote control unit

5. TV a ud io multi pl e x si gnal ge ne rator .

6. Frequ enc y cou nte r

］

ADJUSTMENT ITEMS

Ad just ment it em s Ad just men t it ems

B1 POW ER SU PPL Y SUB B RI GHT

MAIN VCO SUB CONTRAST

BB E

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

DISPLAY

RF. AGC SUB COLOR

FOC U S SUB T I NT

V. HE IGH T V. CENTER MTS IN PUT L EVEL check

H. CENTER

WHITE BA LANC E (Low L i gh t)

WHITE BA LANC E (Hig h Li ght )

MTS SEP ARATIO N

No.51940

SLEEP

TIMER

VIDE O

STA TUS

MENU ▼/▲

EXI T

Page 13

ADJUSTMENT LOCATIONS

(

)

V-27D30 V-27D20

FRONT

POWER

MAIN PWB

POWER

CRT SOCKET PWB

Within MAIN PWB ASS'Y

TP-B

TP-E

(SOLDER SIDE)

VOL+ VOL- CH+ CH- MENU

TOP

CR T EAR TH

(BRAIDED ASS' Y)

IC70 2

F901

IC20 1

T111

IC42 1

IC10 1

S401

TUNER

HV T

IC90 1

UPPE R : FOCU S

AV IN / OUT

No.51940

LOWER : SCREEN

Page 14

V-27D303

V-27D203

BASIC OPERATION OF SERVICE MENU

1. Operate the SERVICE MENU with the REMOTE CONTROL UNI T.

2. In general, basic setting (adjustments) items or verifications are performed in the SERVICE MENU.

(1) V/C (S) ･････････････････････ This se t the s ettin g valu es ( a djustm ent valu es) of the VIDEO/CHRO MA circuits.

(2) DEF (D) (3) SOUND (A) ･････････････････ This se t th e s ettin g valu es (adjustment values) of th e AUDIO cir cuit.

(4) OTHERS (F) (5) PIP (PIP) ･･･････････････････ This se t th e s ettin g values(ad justmen t values) of the PICTURE-IN-PICTU RE circ uit.

(6) 3L Y/C (LCY) ････････････････ T hi s is us ed when th e 3L Y/C MOD E is verified . [Do not adjust]

(7) LOW LIGHT (8) HIGH LIGHT ････････････････ This se ts th e s etting va lu es (a dj ust me nt values ) of t he W HITE BAL AN C E circui t

(9) RF AFC (10) VCO ･･･････････････････････ Thi s is us ed wh en th e IF V CO i s ad j uste d.

(11) I2C BU S (12) SY STEM (SYS) ･･････････････ T hi s is us ed when th e SYSTE M is ver if i ed. [Do not adjust]

3. Basi c Op erations of th e SERVI CE M ENU (1) Ho w to enter the SERVICE MENU.

(2) SERVICE MENU screen selection

････････････････････

････････････････

･････････････････

････････････････････

Press the SLE EP TIM ER key and set the SL E EP T IM ER for ｢0 MIN ｣ .

Then press the DISPLA Y key and VIDEO ST ATU S key of

the remote contr ol u nit at th e sa me ti me to ent er the SERVICE MENU screen.

In SER VICE MENU, press t he MEN U▼/▲(CH-/+) key to

sel ect any of th e SU B MEN U it em s . (The l e tte rs of t he s elect ed it em s are disp layed in ye llo w. )

This se t th e s ettin g valu es (adjustment values) of th e DEFLECTIO N circuit.

Thi s is us ed w hen th e O THERS MO D E i s ver ifi ed . [Do not adjust]

(PIP i s me ans as P icture I n Pi ctur e) [Do not have Function]

Thi s se ts th e setti ng va lues ( adj ust me nt v al ues ) of t he W HITE BAL AN C E circui t.

This is us ed when the RF AFC MODE is verified. [Do not adjust]

Thi s is us ed w hen ON/O FF of the I2C BUS CTRL is set. [Fixed ON ]

SERVIC E MENU

1.V/C(S) 2.DEF(D)

3.SOUND(A) 4.OTHERS(F)

5.PIP(PIP) 6.3L Y/C(LYC)

7.LOW LIGHT 8.HIGH LIGHT

9.RF AFC 10.VCO

11.I2C BUS 12.SYSTEM(SYS)

SELECT BY OPERATE BY EXIT BY

EXIT

(3) Enter the any setting ( adjustment ) mode

" 1.V/C (S), 2.DEF (D), 3.SOUND (A), 4.OTHERS (F),

5. PIP ( P) , 6 .3L Y/C ( LYC), 7 .L OW LIG HT, 8. HIGH LIGHT, 9.RF AFC 10.VCO 1 1.I2C BUS an d 12.SYSTEM

(SYS ) mode

1) If selec t an y of 1.V/C (S) / 2.DEF (D) / 3.SO UND (A)

/ 4.OT HERS (F) / 5.PIP (PIP ) / 6.3L Y/C ( LYC ) /

7.LOW LIG HT / 8.HIGH LIGHT / 9.RF AFC /

10 .VC O / 11.I2C BUS /12.SY STEM (SYS) it ems ,

an d th e ME NU

SERVICE MENU ( MAIN MENU ), the each screens will be dis played as shown in figure page late r.

2) The n the sett in gs or verifi cation s ca n be p erfor med

(VOL-/+) key is pressed from

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

DISPLAY

SLEEP

TIMER

VIDE O

STA TUS

▼/▲

EXI T

No. 51940

Page 15

V-27D30

V-27D20

1.V/C(S)

R F 4 : 3 S TD L O W

S0 1 BR IG H T

2.DEF(D)

R F 4 : 3 S TD L O W

D 01 V F REQ

SERVICE M ENU ( M AIN M E NU )

SE RV ICE M E NU

1. V/ C(S) 2.D EF(D )

3.SOUND( A) 4. OTHERS (F)

5. PI P(P IP) 6 .3L Y/C (LYC )

7. LOW LIGHT 8.HIG H L IGHT

9. RF AFC 10.V CO

11.12 C BUS 1 2.SYSTEM(SYS)

SELECT B Y OPE RAT E BY EX IT BY

EXIT

7.LO W L IGHT

***

B RIG H T

***

SUB MENU

***

8.HIGH LI GHT

3.SO UND(A)

A 01 IN L E VE L

4.OTH ERS (F)

F 01 O S D P O SI

5.PI P( PIP )

PI P01 B RIGH T

6.3L Y/C(LYC)

***

9.RF AFC MAIN

TOO HIGH GOOD TOO LOW T UN ER M A IN

AF G O N FIN E

10.VCO M AIN

T UN ER M AI N HIGH LE VEL

RE FERE NCE L EVE L LO W LEVE L

SY N C NO

11.I2C BUS

I2 C B U S O N

12.SYSTEM(SYS)

DO not adjust

LYC01 MODE

***

SY S0 1 VI DE O IN

No. 51940

***

Page 16

V-27D303

V-27D203

(4) Setting method

1) ME NU ▼/▲ (CH-/+) key.

Select t he SETT IN G IT EM.

2) MENU / (VOL-/+) ke y Setti ng (adjust) the SETTIN G VA LUE of t he SETTIN G ITEM.

When the key i s relea sed th e SETTI NG VAL UE w il l b e st or ed (memorized).

3) EX IT key

Retu rn s to the pre vious scr een .

(5) Rel easing SERVICE MENU

1) Af ter retu rn i ng to t he SE RV ICE M EN U up on co mp l etion of th e s etti n g (adjus tment) wo rk, pr ess t he EXI T key ag ain.

★ The s etting s f or LOW LIGH T and HI GH LIGH T ar e des cribe d in th e

WHITE BA LANCE p ag e of AD JU STMENT.

★ The s et ting f or MA IN VCO ar e desc r ib ed in th e VCO p age of

ADJUSTM EN T.

SETTING N o

RF 4 : 3 STD LOW

SETTING ITEM

1.V/C (S)

BRIGHT

***

7.LOW LIGHT

***S 01 B RIGHT

SETTING VAL UE

***

8.HIGH LIGHT

TUNER MAIN HI

H LEVEL REF ERE NCE L EVEL LOW LEVEL

SYNC NO

10.VCO

No. 51940

Page 17

V-27D30

V-27D20

INITIAL SETTING VALUE OF SERVICE MENU

1. Adjustment of the SERVICE MENU is made on the basis of the initial setting va lu es ; ho wev er, the new setting values whic h set the screen in its optimum condition may differ from the initial setting.

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

V / C M O DE

Initial setting value

RF EXTERNAL (S,CV) COMPONENTNo Setting item Variabl e range

STANDARD THEATER STANDARD THEATER STANDARD THEATER

S01 BRIGHT

S02 PICTURE

S03 COLO R

S04 TIN T

S05 DET AIL

S06 BRIGHT +-

S07 PICT+ -

S08 COLOR +-

S09 TIN T+-

S10 DETAIL + -

No Setting item Variabl e range

S11 R CUT OFF 0～255 50 --- --- --- --- --- --- ---

S12 G CUT OFF 0～255 50 --- --- --- --- --- --- ---

S13 B CUT OFF 0～255 50 --- --- --- --- --- --- ---

S14 R DRIVE 0～127 64 --- --- --- --- --- --- ---

S15 B DRIVE 0～127 64 0 --- - -- - -- - -- - -- - --

S16 R CUT+ - - 128 ～+127

S17 G CUT+- -128～+1 27 ---0000---------

S18 B CUT+- -128～+1 27 --- 0 0 0 -10 --- --- ---

S19 R DRV+- -128～+1 27 --- 0 +5 +7 0 --- --- ---

S20 B DRV+- -128～+1 27 --- 0 +6 -9 0 --- --- ---

S21 NT SC MAT 0 ～3 33312211

S22 BLACK S T 0～3 1 --- - -- - -- - -- - -- - -- - --

S23 DCRE ST 0～1 1 --- - -- - -- - -- - -- - -- - --

S24 DCRSW 0～1 1 - -- - -- - -- - -- - -- - -- - --

0～127 64 --- --- --- --- ---

0～127

0～127 60 --- --- --- 64 ---

0～63 30 - -- 35 --- 40 ---

-128 ～+1 27

-128 ～+1 27 ----150--- 0---

-128 ～+1 27 --- -3 -2 --- --- ---

-128～+1 27 --- -6 +2 --- --- ---

-128 ～+1 27

65 --- --- --- --- ---

45 --- --- --- 47 ---

--- 0 0 --- +1 ---

--- +3 --- --- --- ---

Initial setting value

RF /EXT (S, C V)

STANDARD THEATER STANDARD

LOW HI GH L OW HI GH LOW HIGH LOW HIGH

--- 0 0 0 -10 --- --- ---

--- c a n not b e ad ju stm ent

COMPONENT

THEATER

No Setting item Variabl e range

S25 AS Y SHRP 0～7 444

S26 BP F FO 0～1 00---

S27 KIL R OFF 0～1 00---

S28 KIL R SEN 0～1 11---

RF EXTERNAL (S,CV) COMPONENT

No. 51940

Initial setting value

Page 18

V-27D303

V-27D203

No Se tting item Variabl e ra nge Initial setting value No Setting ite m Variabl e ra nge Initial setting value

S29 RGB MU TE 0～1 0 S39 Y MUTE 0～1 0

S30 BLUE B 0～1 0 S40 SV M GAIN 0～3 0

S31 VIDEO SW 0～3 3 S4 1 SV M PH 0～3 0

S32 CMP ABCL 0～15 0

S33 RGB ABCL 0～1 0 S4 3

S34 OSD CON T

S35 SUB CONT 0～15 8 S45 AGC ADJ 0～127 80

S36 AB L GA IN

S37 ABL PNT 0～3 3 S47 AP C CL K 0～1 1

S38 Y G AM MA

0～63

0～3

9 S44 V1 GAI N

0 S46 VMOFF DE

S42 WPL

COL G MM

0～1 0

0～1

-128～+127

DE F M O D E

No Setting it e m Variabl e range Initial se tting v al ue No Se tting it em Variabl e range Initial set ting value

D01 V FREQ

D02 AFC GAI N 0～3 0 D19

D03 H POSI 0～31 12 D20 EWCR T+- -128～+127 ---

D04

H POSI+-

D05 V PHASE

D06

V P H+-

D07 V SIZE

D08

V S IZE+-

D09 V CENTER

D10

V CENT+-

D11

V S CORR

D12

V S CO+-

D13

V LIN

D14 V LIN+- -128～+127 --- D31 V AGC 0～1 0

D15

H SIZE

D16 H SIZE +- - 128～+127 --- D33 VRMP BI 0～1 0

D17

WVMT TOP

0～3

-128 ～+127 --- D21

0～7

-128 ～+127 --- D23

0～+127

-128 ～+127 --- D25

0～63

-128 ～+127 --- D27

0～15 4 D28

-128 ～+127 --- D29

0～15

0～63

0～3 0

0 D18 W VM T BTM 0～3 0

0 D22 EWCR B+- -128～+127 ---

55 D24 EW PRA+- -128～+127 ---

32 D26 V E HT+- -128～+127 ---

D30

D32

EWCR TOP

EWCR BTM

EW P ARA

V E HT

H EHT

H EHT+-

TR APE Z

TR APE Z+ -

BLANK SW

-128 ～+127 ---

-128 ～+127

--- c a n not b e ad ju stm ent

0～31 16

0～63 26

0～7 0

0～63 34

0～1

---

SOUND MODE

No Settin g it e m Va riabl e range Initial setting value

A01 IN LEVEL 0 ～15 01 2

A02 LOW SEP 0～63 039

A03 HI SE P 0～63 016

A04 SA PC 0～1 00 0

A05 BB E BA SS -128 ～+127 -006

A0 6 BB E TRE - 128 ～+127 - 006

No. 51940

Page 19

V-27D30

V-27D20

" OTHERS MODE (Do not adjust)

No Se tting it e m Va riabl e ra nge Initial se tting v al ue No Setting item Va riabl e ra ng e Initial setting value

F01 OSD P OSI 0～255 27 F15 VCSN 1 0～63 0

F02 OSD PREQ 0～255 83 F16 VCSN 2 0～255 10

F03 CCD P OSI 0～63 45 F17 VCSN 3 0～63 20

F04 CCD FREQ 0～255 93 F18 VCSN ST P 0～63 02

F05 OSD CONT 0～63 11 F19 VN DAT A -128 ～+127 +8

F06 PUR WBCK 0 ～2 0 F20 VM D AT B - 128～+1 27 -4

F07 PUR CONT 0～255 62 F21 VM DAT C - 128～+1 27 -10

F08 SN TYP E 0～255 0 F22 VM DAT D -128 ～+127 -16

F09 YCSN TM 0～255 5 F23 VM D AT E 0～255 0

F10 YCSN E 0～63 5 F24 VMOFF TY 0～63 0

F11 YCSN F 0～255 16 F25 YC V MOFF 0～255 25 5

F12 YCSN G 0～255 32 F26 EZ SF T M 0～255 40

F13 VNR CHK 0～63 3 F27 XD SID TM 0～255 15

F14 VCSN TM 0～255 5 F28 FM TRAP 0～1 1

3L Y / C MODE (Do not adjust)

No Setting it e m Va riabl e range Initial se t ting v al ue

LYC01 MO DE 0～7 4

LYC02 VE NH 0～7 1

LYC03 PDSO FF 0～1 0

LYC04 CB 0～1 0

LYC05 VNLR 0～15 2

LYC06 GSE L0 0～1 0

LYC07 GSE L1 0～1 1

LYC08 COR 0～3 0

LYC09 TRAP 0～1 1

LYC10 CHT RAP 0～1 0

LYC11 CBPF 0～1 0

LYC12 ENHOFF 0～1 0

Se tting i tem c a n n ot displ a y

" SY STEM MODE ( Do not a djust )

No Setting item Variable range

SY S01 VIDEO IN SY S02 PIP 0～1 0

SY S03 3D Y/ C 0～1 0

SY S04 Y CV 0～1 0

SY S05 CCD P CHK 0～1 1

SY S06 PUR IT Y 0～1 0

SY S07 VM 0 ～1 0

SY S08 NOISE CR 0～1 0

SY S09 CLR TEMP 0 ～1 1

SY S10 TH EATE R 0 ～1 1

SY S11 TH EATE R PRO 0～1 1

SY S12 BB E 0～1 1

0～4

Initial setting

value

No Settin g ite m Variabl e ra nge

SY S13 HYP SU R R

SY S14 16:9 MD

SY S15 HYP S CA N

SY S16 EZ SU RF

SY S17 ID DISP

SY S18 COMPULIN K

SY S19 CCD

SY S20 VCH IP

SY S21 VCH IP C A

SY S22 JVC L OGO

SY S23 CMP IN

SY S24 CXA1 875

0～1

No. 51940

Initial setting

value

Page 20

V-27D303

V-27D203

" PIP MODE (Do not adjust)

No Se tting item Variabl e ra nge Init ial setting v al ue No Setting it e m Va riabl e range Initial setting value

PIP01 BRIGHT 0～15 0 PIP 27 U VPO LAR 0～1 0

PIP02 PICTURE 0～255 30 PIP28 MAT 0～1 1

PIP 03 TINT I 0～63 42 PIP29 YCOR 0～1 1

PIP 04 COLO R 0～15 6 PIP 30 XFR EQF 0～1 1

PIP 05 R CUTO FF 0～15 0 PIP31 WTCHDG 0～1 1

PIP06 G CUTOFF 0～15 0 PIP 32 COLO N 0～1 0

PIP07 B CUTOFF 0～15 0 PIP33 ACQNEW 0～1 0

PIP 08 R DRI VE 0～255 65 PIP 34 DST DET 0～1 1

PIP 09 G DRIVE 0～255 65 PIP 35 CRI BEOK 0～1 0

PIP 10 B DRIVE 0～255 63 PIP 36 FC BEOK 0～1 0

PIP11 L POSI 0～255 22 PIP 37 NOCRID 0～1 0

PIP 12 R POS I 0～255 15 PIP 38 NON SED 0～1 0

PIP 13 UPR POS I 0～127 12 PIP 39 PIP ADJ 0～15 4

PIP 14 LWR PO SI

PIP 15 PICT L CK 0～1 1 PIP41 PCT EX T - 128 ～+127 0

PIP16 SELDEL 0～15 0 PIP 42 TN T EXT - 128～+127 0

PIP 17 AGCFIX 0～1 1 PIP 43 COR EXT -128～+127 0

PIP18 AGCADST 0～1 0 PIP44 R-D EXT -128～+127 0

PIP 19 AGC 0～15 7 PIP 45 G- D EXT -128 ～+127 0

PIP 20 BL KIN VB 0～1 0 PIP 46 B-D EXT -128～+127 0

PIP 21 BL KIN VR 0～1 0 PIP47 BRT COMP -128～+127 0

PIP22 VSPDEL 0～31 0 PIP48 PCT COMP -128～+127 0

PIP23 VSPISQ 0～1 1 PIP49 TNT COMP 0～40 0

PIP24 R GBIN 0～1 0 PIP 50 COR COMP 0～15 0

PIP 25 FR SEL

PIP26 OUTFOR 0～1 0 PIP52 G-D COMP -128～+127 0

0～127

0～1

11 PIP40 BRI EXT

1 PIP 51 R-D COMP

PIP53 B-D COMP -128～+127 0

-128 ～+127

NOTE

LOW LIGHT MODE

No Settin g it e m Va riabl e range Initial setting value

1RED 0～255 50 2GREEN 0～255 50 3BLUE 0～255 50

HIGH LIGH T M ODE

No Settin g it e m Variabl e range Initial setting value

1RED 0～255 64

2BLUE 0～255 64

The AV-27D30 3/S /R, AV -27D 20 3/ S /R m od el d o no t ha ve P IP fun ction , B ut, i f mem or y d ata is ou t of v a ri a bl e rang e, occ asion ally som e pr ob lems ha pp en. The n we ne ed to inpu t these da ta .

No. 51940

Page 21

■

)

ADJUSTMENTS

B1 POWER SUPPLY

Item

Check of B1 POWER

SUPP LY

Measuring

instrume nt

DC Volt m et er 【【【【B1 】】】】

ADJUS TMENT OF VCO

Test point Ad justment part Description

1. Recei ve th e blac k-a nd -w hit e sign al. ( colo r off )

Connector

TP-91 TP-E(#)

2. Con nect th e D C voltmet er to 【B1 】co nne ctor 【1】pin (TP-91) an d TP -E (#) (B1 c on nect or【3】pin ).

3. Confirm that the voltage is DC134V±2V.

V-27D30 V-27D20

Item

MAIN VCO adjus tme nt

TUNER MAIN HIGH LEVEL REF ERE NCE L EVEL

LOW LEVEL SYNC NO

Measuring

instrume nt

Signal

gener ator

Test point Ad justment part Description

10.VCO MAIN

CW TRANSF.(T111 [MAIN PWB]

GREE N

" It must n ot adjust w ithout sig nal

1. Se le ct a rece iva ble br oa dcast .

2. Pu s h the MENU▼/▲(CH- /+) key, an d selec t th e 10 .VC O

mod e from th e S ERVIC E MENU.

3. Push the MENU / (VOL-/+) key, and select MAIN.

4. Conf irm t hat t he co lor ch an ge from ｢HIGH LEVEL｣ to ｢LOW LEVEL ｣ b y CW TRAN SF T11 1 at M AIN PW B, and ch eck th e

｢

SYNC : YES｣.

5. Adjust until ｢REFFERENCE LEVEL｣ mark tu rn s gre en.

And th en con firm t ha t th e ｢SY NC : YES｣ ag ai n.

ADJUS TMENT OF RF AGC

Item

RF. AGC adjus tme nt

No Setting item

S45 AGC ADJ 0～127 80

Measuring

instrume nt

Test point Ad justment part Description

S45 AGC ADJ 1. Recei ve a black and whit e sign al ( color off).

2. Select S45 AGC ADJ of th e V /C MODE.

3. Pr ess the MUT IN G ke y and t urn of f c ol or .

4. With the MENU (VOL-) key to get the noise in the scr e en

pictu re ( zer o s ide of s etting va lue) .

5. Press the MENU (VOL+) key s everal times and step when

Variabl e

range

Initial setting

value

n ois e dis appear s f rom th e scr ee n ( a t th at ti me , n ot to incr eas e th e v a lu e too mu ch).

6. Cha nge to oth er ch anne ls a nd make sur e t hat th er e I s n o

irregularity.

7. Press the MUTING key and get color out.

No. 51940

Page 22

V-27D303

(

)

V-27D203

ADJUS TMENT OF FOCUS

Item

FOCUS adjus tme nt

Measuring

instrume nt

Signal gener ator

Test point Ad justment part Description

FOCUS VR [In HVT]

ADJUS TMENT OF DEFLECTION CIRCUIT

1. Recei ve th e cross -hatch sign al .

2. Whi l e l oo k ing at t he s cree n, adju st th e F OCU S VR to the

vertical and horizontal lines will be clear and in fine detail.

3. Make sur e t hat th e p ict ure is in f ocus ev en w he n t he s cree n

g ets d ar k en ed.

Item

V. HE IGHT V. CENTER

adjus tme nt

Scr een size

Measuring

instrume nt

Signal

gener ator

Scr een s ize

Picture size (100 %

Test point Ad justment part Description

D05 V P HAS E D07 V SI Z E

V. CENTER SW (S40 1) [MAIN PWB]

Picture size

100 %

1. Rec ei ve the cr oss -h atch sign al.

2. Se le c t t he D05 V PHASE of th e DEF (D ) mod e, a nd it che cks th at t he valu e of D05 V PHASE is 0.

3. Ad jus t t he ver tic al s cree n size of th e scree n to p t o 92% wit h the D07 V SIZ E an d V CENTER SW S401

Mod el Ve rti cal scree n siz e

AV-27D303/S 89.0%

AV-27D203/S 89.0%

AV-27D303/R 92.0%

AV-27D203/R

No Setting item

D05 V PHASE 0～7 0

D07 V SIZE 0 ～127 55

Variabl e

range

92 .0 %

Initial setting

value

H. CENTER adjus tme nt

Signal gener ator

D03. H POSI 1. Recei v e th e cross -hatch sign al.

2. Select D0 3. H PO S I fr om DEF (D) mode .

3. Adjust b y H POSITION to b e sa me size at b oth side .

No Setting item

D03 H POSI 0～31 12

Variabl e

No. 51940

range

Initial setting

value

Page 23

ADJUS TMENT OF WHITE BALANC E

Item

WHITE BALANCE (Low Light) adjus tme nt

Measuring

instrume nt

Signal gener ator

BRIGHT

***

Test point Ad justment part Description

[LOW LIGHT]

***

R CUTOFF (S11) G CUTOFF (S12) B CUTOFF (S13)

BR IG HT (S 01)

SCREEN VR [ in HVT]

V-27D30 V-27D20

1. Recei ve th e bl ac k an d wh it e sign al ( color o ff ).

2. Se lect t he [LOW LIGHT] MOD E f r om th e SERVICE MENU.

3. Set the initial setting valu e of “R CUTOFF”, “G CUTOFF” “B CUTOFF” and BRIGHT.

1. Disp l ay a si ng l e horiz o nta l lin e by p r essin g t he ①①①① key of t he

remote control unit.

5. Turn t he scr een VR a l l the way t o t he left.

6. Turn th e s creen VR g ra du all y t o the righ t from th e l eft u nti l eith er o ne of the red, blu e o r g r een colors ap pears f aintl y.

7. Adju s t th e tw o color s whi c h d id no t a ppe ar unti l th e sing l e h orizo ntal l in e t hat is displ a yed bec omes whit e using th e ④④④④ to

⑨⑨⑨⑨

key s o f th e re mo te c ont r ol un it .

8. Turn th e scr ee n VR u ntil the s i ng l e hor i zon tal lin e i s di spla yed

fain tly.

9. Pr ess the

10 . Ad ju s t th e BRIG HT lev el to becom e th e bl ac k c omp on en t

shines whit e slight ly.

11 . C onf irm that w het her the color ing redie nt of R ,G, or B is vi s ible

to th e b l ack c o mp one nt, w hi ch shine s white slightly

12 . When the c ol o r ingred i ent can be s een , t wo c olor s o th er tha n a

visible color are adjusted, and it is made to look white.

13. Return the value of BRIGHT to initial s etting value.

②②②②

key to cancel the single horizontal line mode.

REMOTE CONTROL UNIT

H. LI NE ON EX I TH. LI NE OFF

1 2 3

R CU TOFF B CUT OFFG C UTO FF

●

③③③③

The

EXIT key is the cancel ke y for the WHIT E BALANCE.

No Setting item

Variabl e

range

Initial setting

value

S11 R CUT OFF 0～255 50

S12 G C UT OFF

S13 B CUT OFF

S01 BRIG HT

987

0～255

0～127

No.51940

Page 24

V-27D303

V-27D203

Item

WHITE BALANCE

(Hi gh Light) adjus tme nt

Measuring

instrume nt

Signal gener ator

[HIGH LIGHT]

***

Test point Ad justment part Description

R DRI VE ( S1 4) B DR I VE (S1 5)

1. Recei ve th e bl ac k-a nd -whit e s i gn al ( colo r off ).

2. Se lect t he [HIGH LI GHT] M ODE in the SE RVIC E MENU.

3. Set the initial setting value of “R DRIVE” and “B DRIVE” with

the ④④④④, ⑥⑥⑥⑥ , ⑦⑦⑦⑦and ⑨⑨⑨⑨ k eys of the r em ot e c ontr o l uni t.

4. Ad ju st th e screen u nti l i t b ecomes w h ite usi ng th e ④④④④ , ⑥⑥⑥⑥, ⑦⑦⑦⑦ an d ⑨⑨⑨⑨ keys of the r em ot e c ontr o l uni t.

●The ③③③③ EXIT key is the cancel ke y for the WHIT E BALANCE.

Remote Control Unit

①key : H.LI NE ON ②key : H.LI NE OFF ③key : EXIT ④key : R DRIVE ▲ ⑥

key : B D RIVE

⑦key : R DRIVE ▼ ⑨key : B DRIVE ▼

Settin g ite m Va riabl e

S14 R DRI VE

range

0～127

▲

Initial setting

value

SUB BRIGHT adjus tme nt

No Settin g item Va riabl e

S01 BRIG HT

SUB CONT RAST adjus tme nt

No Settin g item Va riabl e

S02 PICT URE

range

0～127

range

0～127

S15 B DRIVE

S0 1. BR I G HT 1. Recei v e th e b r oad cast.

2. Select S0 1. BRI G HT of th e V /C MODE.

3. Set the in it ial s etting valu e o f the S01. B RIGHT with th e ME NU / (VOL - /+) k ey .

4. If the brightness is not the best with the initial setting value,

make fine a dj ustm en t of th e S01. BRIGHT until you get the

Initial setting

value

S02. PICTURE 1. Recei ve th e br oadcast.

Initial setting

value

op ti mu m br i ght ness .

2. Select S0 2 . PI CT URE of the V/C M ODE.

3. Set th e i n itial se tting valu e of th e S0 2. PICTU RE with the ME NU / (VOL - /+) k ey .

4. If the contrast is not the best with the initial setting value, make fin e adj ust me nt of th e S02. PICTURE until you get the

optimum contrast.

0～127

No.51940

Page 25

V-27D30

V-27D20

Item

adjus tme nt

Measuring

instrume nt Signal gener ator

Remote

control unit

gener ator

Oscilloscope

Remote

control unit

Test point Ad justment part Description

[ Method of adjustment without mea suring instrument ]SUB COLOR

1. Recei ve th e b r oad cast.

2. Select S03. COLOR of the V/C M ODE.

3. Set the initial setting va lue of the S03. COL OR with the

MENU / (VOL-/+) key.

4. If t he c olor i s n ot t he best with th e I nitial se tti ng v alu e, mak e

fin e a djust ment of the S0 3. COLOR unt il y ou get t he o ptim um color.

No Settin g item Variabl e

range

S03 COLOR 0～127 45

[ Method of adjustment using measuring instrument ]Signal

1. Inp ut th e fu l l fi el d c olor b ar sign al ( 7 5% whi t e).

2. Select S03. COLOR of th e V /C MOD E.

3. Se t th e i ni ti al sett ing v al u e of th e S0 3. COL OR with the MENU / (VOL-/+) key.

4. C on nec t the os c illosc ope be twee n TP-B and TP-E.

5. Ad just COL OR and b rin g t he v al u e of (A) in the illustration to

th e v o lt age sh ow n i n th e t able be llo w.

TP-B TP-E(#### )

[CRT SOCKET

PWB]

S03. COLOR

Initial setting

value

W-B

(A)

(－)

(＋)

Models

AV-27 D303/ S +15V

AV-27 D203/ S +15V

AV-27 D303/ R + 17V

AV-27D203/R

No. 51940

Volt age

+17V

Page 26

V-27D303

(B)

(－)

V-27D203

Item

SUB TINT adjus tme nt

Measuring

instrume nt

Signal

gener ator

Remote

control unit

gener ator

Oscilloscope

Remote

control unit

Test point Ad justment part Description

[ Method of adjustment without mea suring instrument ]

1. Recei ve th e b r oad cast.

2. Select S0 4. T INT of th e V /C MODE.

3. Se t the initi al s etti ng val u e of t he S04. TI NT with the MENU / (VOL-/+) key.

4. If the tin t is not th e bes t wi th the initi a l set ti ng valu e, m ak e fi ne ad j ustm en t of th e S0 4. T INT u ntil yo u g et t he optim um tint.

No Setting item

S04 TINT

[ Method of adjustment using measuring instrument ]Signal

1. Inp ut the fu l l fi el d c olor bar sign al ( 7 5% whi t e).

2. Select S04. TINT of the V/C M ODE.

3. Se t the initia l s ettin g value of th e S0 4. T I NT with the

MENU / (VOL-/+) key.

4. Con nect th e osc illos c ope be tw ee n TP-B and TP-E.

5. Ad ju st TI NT an d bri ng th e valu e of (B) in the illustr atio n to the

voltage shown in the table bellow.

Variabl e

range

0～127

TP-B TP-E(#### )

[CRT

SOCKET

PWB]

S04. TI NT

Initial setting

value

CyG

BRY

(＋)

No. 51940

W-Mg

Models

AV-27 D303/ S +20V

AV-27 D203/ S +20V

AV-27 D303/ R + 25V

AV-27 D203/ R + 25V

Volt age

Page 27

ADJUS TMENT OF MTS CIRCUIT

V-27D30 V-27D20

Item

MTS IN PUT LEVE L

che ck

MTS

SE PARATIO N adjus tme nt

Measuring

instrume nt

TV audio

mult iplex signal gener ator

Oscilloscope

Test point Ad justment part Description

A01 IN LEV EL 1. Se lec t t he A 01 IN LEVEL of the SOUND MODE.

2. Verif y that the A01 IN LEVE L is set at its initial sett ing value.

No Se tting ite m Variabl e

range

A01 IN LEVEL 0～15 01 2

R OUT

L OUT [AUDIO OUT]

A02 LOW SEP.

A03 HI SE P.

1. Inp ut th e ste reo L s ig na l (30 0H z ) f r om the TV au di o m ul ti pl e x

si gn al g ene r ator t o the ant enna term inal.

2. Connect an oscilloscope to R OUT pin of the AUDIO OUT, and disp lay on e c ycle p ort i on of the 30 0Hz s ig nal .

3. Se lec t t he A02 LOW SE P. of the SOUND MODE.

4. Set the initial setting value of the A02 LOW SEP. wit h the

MENU / (VOL-/+) key.

5. Ad jus t t he A02 LOW SE P. so that the strok e element of the

300Hz signal will bec ome minimum.

6. Cha nge th e c on nec t ion of th e os cillo s cop e t o L OUT pi n of th e

AUDIO O UT, and en large th e volt age axis .

7. Cha nge t he si g nal to 3 kHz, an d si milarly a djus t t he A0 3 H I

SE P.

Initial setting

value

1 cycle

L- Chann el signal wave for m

R-C hannel crosstalk por ti on

Mi n i m u m

Setting item

A02 LOW SEP.

A03 HI SE P.

Variabl e

range

0～63

0～63 01 6

Initial setting

value

03 9

No. 51940

Page 28

V-27D303

9XC529R53 3D526

Q923R9

V-27D203

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT

1. HIGH VOLTAGE HOLD DOWN CIRCUIT

After repairing the high voltage hold down circuit shown in Fig. 1.

Thi s cir cuit sh all b e ch ecked to op er at e co rrect ly.

2. CHECKING OF THE HIGH VOLTAG E HOLD DOWN CIRCUIT

(1) Turn the power switch to on.

(2) As shown in Fig. 1, set the resistor between X c on nec tor 1 a nd 3 .

(3) Make sure t hat th e scr ee n pic ture disap pear s.

(4) Temporarily unplug the power plug.

(5) Remove the resistor replaced X c on nec t or 1 an d 3 .

(6) Ag ai n plug th e pow er pl u g, make s u re th at t he no rmal pi ctur e is di s pla yed on the s cree n.

RESISTOR

Ω±

Ω±Ω±

D931

HEATER

2 1

R52

Fig. 1

No. 51940

Page 29

REPLACEMENT OF CHIP COMPONENT

CAUT IONS

1. Avoid heating for more than 3 seconds.

2. Do n ot rub t he el ec t ro des an d the resist p ar ts of the p att ern.

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

4. Do n ot reuse a ch i p 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 0 w s oldering i r on is r ec omm ended for easil y r em oving p ar ts.

! REPLACEMENT STEPS

1. How to remove Chip parts

#### Resi st o rs, ca pacit ors , et c

(1) As s h own in the f ig ur e, pu sh th e part with 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 emo ve th e chip p ar t.

#### T ran 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 SO LD ER

V-27D30 V-27D20

2. How to install Chip parts

####

Resi st o rs, capacit ors , et c

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

(2) Gr as p the ch ip p art with tw ee zer s and plac e it on th e s old er.

The n hea t and me lt th e so ld er a t b oth ends of t he chip par t.

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

(1) Ap ply sold er to the pattern as indic ate d in the fig ure. (2) Grasp the ch ip p art wit h t we eze rs and p lace it on the s o lder.

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

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

alte rn at ely melt th e sol d er at each l e ad. Shi ft an d r em ov e the chip part.

(4) T he n solder le ads B and C.

Note : A fte r re mo ving t he part , r emove remain ing solder fr o m the

pattern.

No.51940

Page 30

V-27D303

V-27D203

No.51940