JVC AV20BJ8EES, AV21BJ8EES, AV21BJ8ENS, AV21BJ8EPS Service Manual

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SERVICE MANUAL
COLOUR TELEVISION
AV21BJ8EN AV21BJ8EPS AV21BJ8EES AV20BJ8EES
AV21BJ8EES AV20BJ8EES
AV21BJ8 AV20BJ8

CONTENTS

!
SPECIFICATIONS
! SAFETY PRECAUT IONS ・・・・・・・・・・・・・・ !
FEATURES
!
MAIN DEFERENCE LIST ・・・・・・・・・・・・・・
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COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
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SPECIFIC SERVICE INSTRUCTIONS
! SERVICE ADJUSTMENTS・・・・・・・・・・・・ !
PARTS LIST
STAND ARD CIRCUIT DIAGRAM
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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.
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■■■■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]
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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 0 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 10W
GOOD EARTH GROUND
ON E A C H EX PO SE D ME T AL PA RT
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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
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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
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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
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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.
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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
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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.
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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..
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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.
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No. 51998
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