JVC AV-21BT8ENS User manual

No.52054
AV-21BT8ENS AV-21BT8EN
B
AV-21BT8EPS AV-21BT8EP
B
AV-21BT8EES AV-21BT8EE
B
AV-21BT80E
P
1COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
Jul. 2002
AV-21BT8ENS / AV-21BT8ENB
AV-21BT8EPS / AV-21BT8EPB
AV-21BT8EES / AV-21BT8EEB
AV-21BT80EP
CONTENTS
!SPECIFICATIONS ････････････････････
････････････････････････････････････････
････････････････････ 2
!SAFETY PRECAUT IONS ･･････････････
････････････････････････････
･･････････････4
!FEATURES･･････････････････････････
････････････････････････････････････････････････････
･･････････････････････････5
!MAIN DIFFERENCE LIST ･･････････････
････････････････････････････
･･････････････5
!SPECIFIC SERVICE INSTRUCTIONS ････
････････
････ 6
!SERVICE ADJUSTMENTS････････････
････････････････････････
････････････ 11
!PARTS LIST ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 21
★OPERATING INSTRUCTIONS
★STANDARD CIRCUIT DIAGRAM ･･･････
･･････････････
･･･････ 2- 1
SERVICE MANUAL
COLOUR TELEVISION

No.52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
2
SPECIFICATIONS
Content
Item AV - 21 BT 8 EN S
AV - 21 BT 8 EN B
AV -21 BT8 EPS
AV -21 BT8 EPB
AV - 21 BT 8 0EP
AV -21 BT8 EES
AV -21 BT8 EEB
Dimensions ( W×
××
×H×
××
×D ) 59 6m m×4 46m m×4 90m m
Mass 21 .4 kg
TV RF System B/G B/G , L/L ’ B/G , D/K
TV Mode PAL PAL / SECAM PAL / SECAMColour Sy st em
Video Mode PA L / SE CAM / NTSC 3.58 / NTSC 4 .43 (E P/ EE MODEL )
PAL / NTSC 3.58 / NTSC 4.43 (EN MO DEL)
Sound System German + NICAM
Teletext System Fast ext / Topte xt
Receiving Frequency
VHF(VL) 46 .25 MHz ～1 68. 25 MHz
(VH) 17 5.2 5MHz ～46 3.2 5MHz
UHF 47 1.2 5MHz ～86 3.2 5MHz
CATV S1 -S 20 , S 21-S4 1 & S7 5-S79 S1 -S 20, S2 1-S41 & S75-S 77 S1 -S 20 & S 21-S4 1
Intermediate Frequency
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 .5MHz:L’)
Colour Sub Carrier Freq.
PAL 4.43MHz
SE CAM 4.43MHz
NT SC 3.58MHz / 4.43MHz
Power Input AC 2 20V ～240V , 50Hz
Power Consumption 85 W (M ax.), 2 .5W (Sta nd by)
Aerial Input Term 75 Ωun ba lanc ed, C oaxial
Pictur e Tube Size Vi si ble si ze : 5 1cm, M eas ur ed dia gon all y
Hi g h Vo lt ag e 27 .7 kV
Spe ake r 5.7 cm ×16cm Oval type×2
Au dio Output 6.5 W ×2
Vide o 1V p- p, 75 Ω
S/V ideo Y : 1Vp- p Po sit i ve
C : 0 .2 86V p- p
Input
Au di o ( L/ R) 50 0m Vr ms, H igh Imp ed an ce
Vide o 1V p- p 7 5Ω
Output
Au di o ( L/ R) 50 0m Vr ms, Lo w Im pe da nce
Rear Side AV 1 ( Vi d eo/A ud i o/RGB)
AV 2 (Vid eo/A ud io/S- VHS)
Input Terminal
Front Side AV 3 ( Vid eo/A ud io)
Front Side Hea dph on e j ac k (S ter e o mini j ack 3.5 φ)Output Ter minal
Rear Side AV 1 ( Vi d eo/A ud i o)
AV 2 ( Vid eo/A ud io) (S elect ed TV,A V1 or AV 3)
Remote Control Unit VE -3 00 177 63 (RM-C 11 00), (A A/R0 6 d ry b at ter y×2)
Design & speci ficatio ns ar e subject to change wi thout no tice.

No.52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
3
■
■■
■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)
Pin No. Signal Designation Matching Value AV-1 AV - 2
22
2
1AU DIO R o ut put 50 0m Vrms( Nom ina l) ,
Low impedance
○
(TV OUT)
○
2AU DIO R in put 50 0m Vrms( Nom ina l) ,
Hig h im pe da nce ○○
3AU DIO L o utp ut 50 0m Vrms( Nom ina l) ,
Low impedance
○
(TV OUT)
○
4AUDIO G ND ○○
5 GND (B) ○○
6AUDIO L input 500mVrms(Nominal),
Hig h im pe da nce ○○
7B in put 70 0m VB- W , 75Ω○NC
8FUNCTON SW
(SLOW SW)
Low : 0-3V, High : 8-12V, High
impedance ○○
9 GND (G) ○○
10 SCL3 NC NC
11 G in put 70 0m VB- W , 75Ω○
NC
12 SDA3 NC NC
13 GND (R) ○○
14 GND (YS)○○
15
R / C input R : 700mVB- W , 75Ω
C : 300mVP- P , 75Ω
○
(only R)
○
16 Ys input Low : 0 - 0.4, High : 1 - 3V, 75Ω○ NC
17 GND(VIDEO output) ○○
18 GND(VIDEO input) ○○
19 VIDEO output 1V P- P( Nega tive g oin g sync ), 75 Ω○
(TV)
○
20 VIDEO / Y input 1V P- P(Nega tive g oin g sync ), 75 Ω○ ○
21 COMMON G ND ○○
[Pin assignment]

No.52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
4
SAFETY PRECAUTIONS
1. The d esi gn of th is prod uct con ta in s sp ecial har d wa re , ma ny
circuits and components specially for safety purposes. For
con tinu ed prot ection , n o chan g es sh ou ld b e ma de to the o rig i nal
d esi gn un less a uth or ized in writi n g by th e ma nu fact ur er .
Rep lacem en t p ar ts m ust b e id ent ic al to thos e u sed in th e or igin al
ci rcu it s. Se r vic e sh ou ld be pe rf or me d b y q ua lifie d per so nn el
on ly.
2. Al te r ati on s of t he desig n or cir cuitr y of t he pr od ucts sh ould not be
made. Any design alterations or additions will void the
m anu fact ur er's w arr a nt y and w ill f ur th er r eli eve t he ma nu factu r er
of r esp onsi b ility for per so na l i njur y or p r op er ty d am ag e r esul t in g
th er efr om .
3. M an y e lectr ical an d m ech anica l p arts in th e pr od ucts ha ve
special safety-related characteristics. T hese characteristics are
oft en no t e viden t f r om visua l insp ection n or ca n t he pro tect io n
aff or de d by th em nece ssar il y b e ob tai n ed b y u sin g r ep lacem en t
com po ne nts ra ted f or hi g he r vo ltag e, w att ag e, etc. R ep lacemen t
p arts wh ic h ha ve th ese sp ecial s afet y ch aract er ist ics ar e
identified in the parts list of Servic e manual. El ec tric al
components having su ch features are identified by shading
on the sche matic s and by (!
!!
!) on the parts list in Service
manual. The us e of a sub stitu te rep la cem en t which do es n ot
h ave th e sam e saf ety ch ar act er ist ics as t he r eco mmen de d
r eplac em ent part sh own in th e p arts list of S er vice m an ual m ay
cause shock, fire, or other hazards .
4. Do n't shor t between the LIVE side ground and ISOL ATED
(NEUTRAL) 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 own by t he LI VE : (") side GND, the
ISO LATE D(NEUTRAL) : ( #) side GND an d EA RTH : ($) side
GND. Don't short between the LIVE side GND and
ISO LATE D(NEUTRAL) side GND or EARTH sid e GND and
n ever m ea sur e wit h a m ea sur ing a ppa r atus ( osci llo scop e etc.)
th e LI VE sid e GND an d IS OL ATED (NE UTR AL ) sid e GND or
EARTH side GND at th e s ame time.
If above note will not be kept, a fuse or any parts will be broken.
5. If any repair has been made to the chassis, it is recommended
th at t he B1 set ti ng shou l d b e ch ecke d or adju ste d ( Se e
ADJUSTMENT OF B 1 POW E R SUPPL Y).
6. The hi gh vol ta ge app lie d t o th e pictu r e tu be mu st con for m wit h
th at sp eci fied in S ervi ce m an ual. E xcessive h igh vo lt ag e ca n
cau se an incr e ase in X- Ray em issi on , ar cing an d possib le
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
preve nt ed. If s evere arc in g occurs, r emove t he AC power
immed iate ly an d de ter mi ne th e ca use b y visua l i nsp ect io n
( in cor rect in stal lat i on, cr acke d or m elte d high vo lt age har n ess,
p oor so ld eri ng, et c.) . To maint ain the p rope r mi n imu m le vel of
sof t X- Ray em ission, c omp on en ts i n th e hi gh voltag e ci rcui tr y
incl ud ing t he pict ur e tu be must b e t he e xact r ep lacem e nts or
alte rn at ives ap prove d b y th e ma nuf act ur er of th e c om plet e
pr od uct.
7. Do n ot c hec k high volt ag e b y drawing an ar c. Use a high volt ag e
meter or a hig h v oltag e prob e wit h a VTV M. Dis charg e the
picture tube before attempting meter connection, by connecting
a cli p le ad to th e grou nd f ra me a nd c onn ecti n g th e oth er end of
the lead through a 10kΩ2W resi sto r to the an od e b utt on .
8. W hen se r vi ce is r equ ir e d, ob ser ve th e origi na l lea d dr ess. E xtr a
pr ec aut i on sh ou ld b e g i ve n t o assur e corr ect l ea d dress i n th e
hig h voltag e cir cuit a rea. W her e a s hor t ci rcuit h as occu rre d,
th ose co mp on ent s tha t indica te evide nce of ove r hea ti ng sho ul d
b e r e place d. A l wa ys u se th e ma nuf act ur er's r ep lacem en t
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
Af ter r e-ass emb lin g th e p r odu ct, al ways per f orm an i sol at io n
ch eck on the expo sed me tal p arts of t he cabin et ( a nte nn a
ter m ina ls, vid eo /au dio inpu t and ou tpu t t er min al s, Con tr ol kn obs,
metal cabinet, screwheads, earphone jack, control shafts, etc.)
to be su re th e p rodu 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 i so l ati on be tw een the A C pr ima ry circu it an d all me tal p ar ts
exp ose d t o th e us er , p ar ticul arly an y e xp os ed met al p art h avi ng a
r etu rn p ath to t he chass is sho uld withs tan d a volt age of 3 000 V
AC (r.m.s.) for a period of one second.
( . . . . W it hstan d a vo lt ag e of 1 10 0V A C ( r .m. s.) t o an ap pl ianc e
r ate d up to 12 0V , an d 3 00 0V AC ( r .m. s.) to an ap pl ian ce r at ed
200V or more, for a period of one second.)
This method of test requires a t est equipment not generally found
in t he ser vic e tr ade.
(2) Leakage Current Check
Pl ug th e A C lin e c ord d irect l y in to th e A C ou tlet ( d o n ot use a li n e
isol ati o n tr ansf or m er du r in g this ch eck.). Usi n g a " Lea kag e
Cur rent Teste r", me asur e th e l ea kag e cu rr e nt f rom each exp osed
m etal p ar t of the ca bi ne t, p art icu lar ly any e xpos ed me tal p ar t
h aving a re turn path to t he ch assis , t o a kn own go od ea rt h
gr ou nd (w a ter pip e, e tc.) . An y leaka ge cur ren t m ust n ot e xceed
0.5mA AC (r.m.s.).
Howeve r, i n tr op ic al ar ea , th is mu st no t exce ed 0.2 mA AC
(r.m.s.).
"
""
"Alte rn ate Che ck Met hod
Pl ug th e A C lin e c ord d irect l y in to th e A C ou tlet ( d o n ot use a li n e
isol ati o n tr an sfor mer dur ing t hi s che ck.) . U se an AC vo lt me ter
h avi ng 1 00 0 oh ms pe r vol t or m ore sens it ivity in th e fo llow ing
m ann er. Con nec t a 1 50 0Ω10W res ist or par a lle le d b y a 0 .1 5µF
AC -type c apa cit or bet we en an expo sed met al pa rt a nd a kno wn
g ood e ar th gro un d ( wa ter pi pe , etc.) . Meas ur e th e A C vo lt ag e
acr oss th e r es ist or w ith th e AC vo ltm eter . M ove th e r esi stor
con nec ti on to e ach exp ose d me tal par t, p art icul arly a ny exp osed
m etal p ar t havi n g a retu rn pat h to t he ch assis, an d m easu r e th e
AC vol tag e ac ro ss the r es ist or . No w, re ver se th e plu g in th e AC
ou tl et and r e pe at eac h mea sur em en t. An y volt ag e me asu re d
must not exc eed 0.7 5V AC (r.m. s.). This c orresponds to 0.5mA
AC (r.m.s.).
However, in tropical area, this must n ot exceed 0.3V AC ( r.m. s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15μF AC-T YPE
1500 Ω10W
GOODEARTH GROUND
PLACE THIS PROBE
ON E A CH EX PO SE D
ME T AL PA RT
ACVOLTMETER
(HAVING 1000 Ω/V,
OR MOR E SENSIT IVITY)

No.52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
5
FEATURES
1. It is a remote controlled color television.
2. 10 0 prog r ams from VH F, UHF b an ds or cab le cha nn els can be
pres et.
3. It c an tun e c abl e cha nn el s.
4. C ont ro llin g th e TV is ver y easy by i ts m en u dr ive n s yst em .
5. It h as tw o Eur oc on nect or sock ets f or e xter n al d evi ce (su ch as
vi de o r eco rd er, vid eo ga mes , a udi o set, e tc.)
6. Fr ont AV Inp ut avai la bl e.
7. St er eo s ou nd s ys tem s (Ger man + N ic am) a r e a va il ab le .
8. Full fu nctio n Tele text (Fa ste xt , Toptext).
9. It is possib l e to con nec t h ead ph on e.
10. Direct channel acc ess.
11 . AP S ( Aut om at ic P r ogr ammi ng Syste m).
12 . Al l pr og rams ca n b e nam ed .
13 . For war d o r bac kward au to ma tic tu ni ng .
14 . Sl ee p time r.
15. Child Lock
16 . Au tom at ic sou nd mu te wh en no tr an smission .
17 . 5 minu tes aft er the br o adc asti ng ( cl osed own) , the T V s witch es
itsel f aut om ati ca lly t o st and - by mod e.
MAIN DIFFERENCE LIST
!
!!
!
Model Name
Part Name
AV -2 1B T8 ENS
AV -2 1B T8 ENB
AV -2 1B T 8 EP S
AV -2 1B T 8 EP B
AV-2 1B T80EP
AV -2 1B T 8 EE S
AV -2 1B T 8 EE B
MAIN PWB VE-20101111 VE-20101105 VE-20101103
!INSTRUCTION BOOK VE-50028252 VE-50028287 VE-50028323
!FRON T CABI NET VE-20073594(ENS)
VE-20068238(ENB)
VE-20073594(EPS)
VE-20068238(EPB)
VE-20073594(EP)
VE-20073594(EES)
VE-20068238(EEB)
!REAR COVER VE-20079486(ENS)
VE-20101109( ENB)
VE-20079486(EPS)
VE-20101109( EPB)
VE-20079486(EP)
VE-20079486(EES)
VE-20101109(EEB)
!LENS VE-20056445 VE-20056445
(
EPS/EPB
)
VE-20096121(EP) VE-20056445
!RATING LABEL VE-20101398(ENS)
VE-20101401(ENB)
VE-20101557(EPS)
VE-20101554(EPB)
VE-20101551(EP)
VE-20101656(EES)
VE-20101601
(
EES
,
POLAND
)
VE-20101658(EEB)
VE-20101654(EEB, POLAND)
CAR TON BOX VE-50028257(ENS)
VE-50028260(ENB)
VE-50028295(EPS)
VE-50028292(EPB)
VE-50028289(EP)
VE-50028329(EES)
VE-50028330(EEB)
CABINET COLOUR
Mo del Name FRONT C ABINET & R EAR COVER LENS
AV-21BT8ENS
AV-21BT8EPS
AV-21BT8EES
SILVER BLACK
AV-21BT8ENB
AV-21BT8EPB
AV-21BT8EEB
BLACK BLACK
AV-21BT80EP SILVER SILVER

No.52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. U np lu g t he po we r c or d.
2. Remove the 5 screws marked A as shown in t he Fig. 1.
3. W ithdra w t he r ear co ver to wa rd you .
REMOVING THE MAIN PWB
"Removing the rear cover.
1. Sl ight l y r aise t he bo th sid es of th e ch assis b y h and an d w ithd r aw
th e M AIN PW B ba ckwar d.
(If necess ary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER
"Removing the rear cover.
1. Remove t he 4 screws mar ked B, an d r e mo ve sp ea ker as s h ow n
in Fig. 1.
2. R emove th e sp eake r .
REMOVING THE FRONT AV PWB
"Removing the rear cover.
"Removing the MAIN PWB.
1. Rem ove th e 2 screws m arked C.
2. Remove th e FRONT AV PWB.
REMOVING THE HEADPHONE PWB
"Removing the rear cover.
"Removing the MAIN PWB.
1. Rem ove th e 1 screw marked D.
2. Remove theHEADPHONE PWB.
CHECKING THE PW BOARD
To ch eck the b ack side of th e PW B oar d.
1) Pu ll o ut th e PW B oar d. (Ref er to REM OV IN G T HE MA IN
PW B ).
2) Er ect th e PW B oar d ve rt ic al ly so t ha t you c an easily ch eck
th e b ack side of th e PW B oar d.
[CAUTION]
"When erecting the PW Board, be careful so that there will be no
con tact in g wi th ot her PW Boar d.
"Be for e tur n in g on po wer , ma ke sure t ha t the w ire co nn ecto r is
pr op erly con nec ted .
"W hen co ndu cting a ch eck with p ower su ppl ied , b e sure to c onfir m
th at t he CRT E ARTH W I RE (B RA IDED AS S’Y) is co nnected t o
th e CR T SOC KE T PW b oar d.
WIRE CLAMPING AND CABLE T YING
1. Be sure t o clamp th e wire.
2. N ever r em o ve th e c able ti e u sed f or t ying th e wires to ge the r.
Sh oul d it be in adve rt ent ly r emove d, b e su r e to ti e th e wir es wit h
a n ew c abl e ti e.

No.52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
7
Fi
g
. 1
REAR COVER
SP EAKE R
MAIN PWB
FRONT CABINET
HEADPH
O
NE PWB
(× 2)
(× 5)
CRT
D(×1)
C
(×4)
B
A
SP EAKE R
FRONT AV PWB
(×4)
B

No.52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
8
REPLACEMENT OF CHIP COMPONENT
!CAUTIONS
1. Avoid heating for more than 3 seconds.
2. D o n ot ru b t he el ect ro des an d t he r esi st p ar ts of th e p att er n.
3. W hen r em ovi ng a c hip part, m elt th e s ol der ad equ ate ly.
4. D o n ot r euse a ch i p p ar t afte r re mo vi ng it .
!SOLDERING IRON
1. Use a hig h ins ulatio n s oldering iron with a t hin po inted e nd of it .
2. A 3 0 w s ol dering ir on is r ec om mend ed for easi ly r emoving p ar ts.
!REPLACEMENT STEPS
1. How to remove Chip parts
#
##
#Resi st ors, ca pa cit ors , et c
( 1) As sh own in t he f ig ure, pu sh th e pa rt wi th twee zer s and
alte rn at ely m elt th e sol de r at each en d.
( 2) Sh if t wi th tw eeze rs an d r emo ve th e ch ip p ar t.
#
##
#Trans ist ors, d iodes , va ria bl e r es ist or s, et c
( 1) Ap ply e xt ra so ld er to ea ch l e ad .
( 2) As sh own in t he f ig ure, pu sh th e pa rt wi th twee zer s and
alte rn at ely m elt th e sol d er a t each l e ad . S hift an d r em ove t he
chip part.
Note : After remo ving t he part , remove remaining solder from the
pattern .
2. How to install Chip parts
#
##
#Resi st ors, ca pa cit ors , et c
(1) Apply sold er to the pattern a s indic ated in the figure.
( 2) Gr asp t he ch ip p art with tw ee zers and plac e i t on th e s old er.
The n h ea t an d me lt th e so ld er a t b oth en ds of t he chi p par t.
#
##
#Trans ist ors, d iodes , va ria bl e r es ist or s, et c
(1) Apply sold er to the pattern a s indic ated in the figure.
( 2) Gr asp th e ch ip p art w it h t we eze rs an d p l ace it on th e so lder .
(3) First s older lead Aas indica ted in t he figu re.
( 4) The n so ld er l e ads Band C.
SOLD E R SOLD E R
A
B
C
A
B
C

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
9
SERVICE MENU SELECT KEY
MEMORY IC REPLACEMENT
1. Memory IC
This model use a memory IC.
Thi s me mo ry I C st or es d ata for pr op er op er atio n of the vid eo
an d d ef lecti on circu it s.
When replacing, be sure to use an IC containing this (initial
value) data.
2. Memory IC replacement procedure
(1) Power off
Sw itch of f t he p ower an d di scon nec t th e po we r co rd fr om
the wall outlet.
(2) Replace the memory IC
Init ial value must be entered into the new IC.
(3) Power on
Con nect th e po wer cor d t o t he wa ll o ut le t an d s witch on t he
power.
(4) SERVICE MENU setting
1) Press MENU key an d, whi le th e displ a yed M ENU
screen, press 4, 7, 2, 5 key on th e r emote co ntr ol u ni t or
press MUTING key and INFORMATION key at the
simultaneously.
2) The SERV ICE M ENU scr ee n of Fig.1 is d isp layed .
3) Ve rif y wh at to set in th e SER V IC E M EN U, and set
what ever i s n ece ssar y ( Fig.1 ). R ef er to th e SE RV IC E
ADJUSTMENT for setting.
4) Press the STANDARD key to exit SERVICE MENU.
(5) Receive c hannel setting
Refer to th e OP ERATING I NSTRUCTIO NS (US ER’S
GU ID E) a nd s et th e r ece ive ch an nel s ( Chan n els P r eset ) as
described.
( 6) U ser se ttings
Check th e us er sett in g it em s acc or ding to aft er pa ge .
W here th ese d o no t a gree, refer to t he OPE RA TIN G
INSTRUCT IONS (USER’S GUIDE) and set the it ems as
described.
Fig.1
SE RV ICE MENU
Fig.2
VALUE
SELECT(－)
VALUE
SELECT(＋)
NUMBER
ITEM
SELECT(▲)
ITEM
SELECT(▼)
MENU
FUNCTION
POWER
MU T I NG
INFORMATION
COLOUR
k
ey
STANDARD

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
10
SETTING OF THE LAST MEMORY FOR SHIPMENT
■
■■
■USER SETTING VALUES
Setting Item Setting Value Setting Item Setting Value
SOUND MENU FEATURE MENU
BA LANCE CEN TER SL EEP TIME R OFF
BA SS ↑CHILD LOCK OFF
TREBL E ↑LA NG UA GE ENGL ISH
MODE STEREO AV-2 OUTPUT TV
EFFECT OFF
PICTURE MENU INSTALL
BRIGHTNESS PROGRAMME
CONTRAST BAND
COLOUR CHANNEL
SHAR PNES S SE ARCH
HUE (only NTSC)
Thes e ad j ust a re aut om ati ca lly
restored wh en APS b it in Service
menu is set .
The pr oc edu r e f or se tting AP S
bit is described bellow. FINE TUNING
PICTURE MODE AUTO STORE
Refer to t he INSTRUCTI ON
BOO K
■SETTING APS BIT IN SERVICE MENU
1) En ter ser vice me nu in TV m ode b y pr essing “INFOR MA T ION” a nd “ MUTI NG” ke ys si mu ltan eou sl y. S er vic e M en u wi ll ap pea r.
2) Se le ct TX1 (TEL ETEXT OPTIO N) b y pr essi n g U p /Dow n keys o n rem ot e c ontr o l un it.
3) Press the 7 key on remote c ontrol unit to set APS bit. (After this, bit 7 of TX1 will be “1”)
4) Press STANDARD key on remote control unit to exit service mode.
NOTE : DO NOT TURN OFF THE TV BY USING POWER BUTTON ON THE FRONT PANEL.

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
11
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You ca n ma ke t he ne ce ssa ry adjust me nts f or t his unit wit h
either the Rem ote Control Unit or with the adjustment tools
and parts as given below.
2. Ad justment with the Remote Control Unit is made on the
basis of the initial setting values, however, the new setting
values which set the screen to its optimum condition may
differ from the initial settings.
3. M ake sur e t hat AC p ow er i s tu r ned o n c orrec tly.
4. T urn on th e pow er for s et an d test eq uip me nt bef or e use , and
sta rt t he ad justm en t p r oced ur es aft er w aiti ng at l east 30 m in ut es.
5. U nless o the r wise s pec if ied, pr ep are t he mo st su it ab le recep ti on
or inp ut si gn al for adjust m ent.
6. N ever t ouc h a ny a dj ust me nt p art s which ar e n ot spec if i ed i n th e
list for this adjustment - variable resistors, transformers,
condensers, etc.
7. Pr es etting b efor e ad j ustm en t.
Unless ot her wi se spec if ied in t he a djustm e nt i nstr uct ions, p r ese t
th e f ol lo win g f un cti ons w ith th e r e mo te c ont ro l un it :
BRIGHTN ES S
CONTRAST
COLOUR
SHAR PNES S
CENTER
ADJUSTMENT EQUIPMENT
1. DC voltmeter (or digital voltmeter)
2. Sign al g en er at or (P att er n g en er at or) ［PA L/SE CAM/N TSC］
3. Remote control unit
ADJUSTMENT ITEM
!SCR EEN A DJUST MENT
!OSD HORIZONTAL POSITION ADJ USTMENT
!IF ADJUSTMENT
!AGC A UTO MATI CA LLY A DJUSTM ENT
!DEFLECTION CIRCUIT ADJUSTMENT
!GEO MET RY ME NU AD JUS TME NT
!WHITE BALANCE ADJUSTMENT
MAIN PARTS LOCATIONS FRONT
FRONT
TOP
HEADPHONE PWB
CRT SOCKET PWB MAIN PWB
SI DE
FRONT AV PWB

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
12
BASIC OPERATION SERVICE MENU
■
■■
■HOW TO ENTER THE SERVICE MENU
1) Press the MENU key.
2) ME NU sc re en of fig.1 w ill b e d ispl a ye d
3) W hil e the ME NU scr ee n is di sp layed , p r ess th e 4,7 ,2, 5 ke y or
INFORMATION key and MUT ING key s imult aneously.
4) The SERVICE MENU screen of (Fig.2) will be displayed.
■SELECT ION OF ADJUSTMENT ITEMS
1) En ter th e SERVICE ME NU
2) Press the FUNCTION / key and select the ADJUSTMENT
ITEM.
3) Press the FUNCTION / key and s et t he SETTI NG VALUE.
■HOW TO EXIT SERVICE MODE
1) Press the ST ANDARD Key on REMOTE CONTROL UNIT.
■HOW TO ENTER T HE GEOMETRY MENU
"Thi s m o del is bu ilt- in GEO ME TR Y M ENU f or ge om et 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 FUNCTION / key and s et t he SETTI NG VALUE.
MENU SCRE EN
Fi
g
.1
MENU
SOUND
PICTURE
FEATURE
INSTALL
PROGRAM
SE RV ICE MENU
Fi
g
.2
ADJUSTMENT ITEM SETTING VALUE
Fi
g
.3
VSIZ 023
VPOS 028
VSCO 000
VCCO 008
HSIZ 007
HPOS 039
HPIN 015
GEOME TRY
GEOME TRY MEN U
ADJUSTMENT ITEM SETTING VALUE
"FUNCTION OF COL OUR key
RED key :
It sw itch es th e AV L t o ON o r OFF mo de on ser vic e
m enu . AV L wo rd is visi ble o n s er vi ce m en u wh en
AV L is o n.
GR EE N k ey :
It s witch es t o GE OMETRY a djust menu . G eomet ry
of th e p ict ur e is a djust ed in th i s m enu .
YELLOW key :
It s witches t o VERT ICA L SCAN DISA BLE mode.
It is us eful t o a dj ust screen vol t age .
BL UE ke y :
It i s used to a dj ust AGC an d I F au tom a tical ly on
ser vice me nu.
REMOTE CONTROL UNIT key NAME
NUMBER key
FUNCTION
key
AV key MENU key
COLOUR k ey
STANDARD
key
INFORMATION
key

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
13
■ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU
ADJUSTMENT
ITEM DESCRIPTION INITIAL VALUE
OSD HORIZONTAL P OSI TION OF OSD 082
IF1 IF COARS E ADJUSTM ENT 00 4
IF2 IF FINE ADJUSTMENT 065
IF3 IF COARS E ADJUSTM ENT FOR L-P RI ME 00 4
IF4 IF FINE A DJUS TME NT FO R L-PRIME 065
AGC AUTOMATIC GA IN CO NT RO L Automat ic ally
VLIN VERTICA L LINEARITY 045
RGBH RGB MODE HORIZONTAL SHIFT OFFSET 007
VSOF VERTICA L SIZE OFFSET for 60Hz -01
VP OF VE RTICA L PO SITIO N OFFSET f or 60 Hz -01
HSOF HORIZONTAL SIZE OFFSET for 60Hz Not used
HPOF HORIZONTAL P OSI TION OFFSE T for 6 0Hz +00
HTOF HORIZONTAL TRAPEZOID O FFSET for 60Hz Not used
W R W HITE PO INT ADJU STME NT FO R RE D 04 0
WG WHITE PO INT ADJUSTME NT FO R GREEN 04 0
WB WHITE PO INT ADJUSTMENT FO R BLUE 040
BR BIA S FOR R ED 03 0
BG BIA S FOR G RE EN 03 1
APR AUTOMATIC RGB PEAK REGULATION THRESHOL D 010
BRI BRIGH TNES S 03 0
CON CONTRAST 035
COL COLOUR 038
SHR SHARP 006
HUE HUE 031
VOL VOL UME 015
WR-R WHITE PO INT ADJUSTMENT for RED (RGBmo de) 030
W G-R W HITE PO INT ADJUSTME NT for GREE N (RGBm ode) 05 5
WB-R WHITE PO INT ADJUSTME NT for BL UE (RGBmo de) 032
FMP 1 FM PR ES CA LER W HE N AV L IS OFF 00 9
NIP1 NICAM PRESCALER WHEN AVL IS OFF 020
SCP1 SCAR T PRES CA LER W HE N AV L IS OFF 01 3
SE C1 SE CA M PRE SCALE R W HE N AV L IS OFF 01 3
FMP 2 FM PR ES CA LER W HE N AV L IS ON 01 3
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 CA M PRE SCALE R W HE N AV L IS ON 01 3
F1H HIGH BYTE OF VHF1-VHF3 CROSS-OVER FREQUENCY 00001001
F1L LOW BYTE O F VHF1-VHF3 CROSS -O VER FREQ UE NCY 1001 00 10
F2H HIGH BYTE OF VHF3-UHF CROSS-OVER FREQUENCY 00011011
F2L LOW BYTE O F VH F3- UHF CROS S-OVER FREQ UE NCY 1000 00 10
BS 1 BA ND SW ITCHING B YTE FOR V HF1 00 00 00 11
BS 2 BA ND SW ITCHING B YTE FOR V HF3 00 00 01 10
BS 3 BA ND SW ITCHIN G B YTE F OR U HF 10 00 01 01
CB CONTROL B YTE 10 00 11 10
OP1 PERIPHERAL OPTIONS 01110101
1/2

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
14
■ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU
"[GEOMETRY MENU]
ADJUSTMENT
ITEM DE SCRIPTI ON INITIAL VALUE
OP2 RECEPTI ON STANDARD OPTIO NS 0000 10 01 (EN)
01 00 10 01 (E P)
00 01 10 01
(
EE
)
OP3 VIDEO OPTI ONS 01101101 (EN)
11 10 11 01 (E P/EE )
OP4 TV FE ATU RE S 10 00 10 00
OP5 CHA N NE L T A BLES 00 00 00 00
TX1 TEL ETEXT O PTION S 10 01 0101 (E N)
10 00 01 01 (E P)
10 00 11 01 (E E)
GEO M GEO MET RY OPTIO NS 0000 0000
OP8 PIP PRES ET CHANGE 00 0000 00
ADJUSTMENT
ITEM
DESCRIPTION INITIAL VALUE
VS IZ VE RTICA L S IZE f or 50Hz 030
VP OS VE RTIC A L PO SITIO N for 5 0Hz 01 0
CSCO VERTICAL S-CORRECTION for 50Hz Not used
VCCO VERTICAL CORNER CORRECTION for 50Hz Not used
HSIZ HORIZONTAL SIZE for 50Hz Not used
HPOS HORIZONTAL P OSI TION 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 50Hz Not used
2/2

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
15
ADJUSTMENTS
■
■■
■SCREEN ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
SCREEN
adjust me nt
Remote
control unit
SCREEN VR
[On the FBT]
1. En ter SE RVIC E M ENU.
2. Pr ess YEL LOW ke y to di sab le ve rt ic al s can .
3. Ad ju st SC REE N VR . on th e FBT a s th in as po ssib le.
4. Pr ess YEL LOW k ey ag ai n to en able ver tical sc an.
5. Pr ess STANDARD key t o le ave s ervic e men u.
■
■■
■OSD HOR IZONTAL POSITION ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
HORIZONTAL
POS ITION O F
OSD
adjust me nt
Remote
control unit
OSD 1. En ter SE RVICE M ENU.
2. Select OSD with FUNCTION ( / ) ke y
3. Adjust the OSD horizontal position with the FUNCTION ( / )
key, wh ic h shi fts th e r ef er ence b ar o n the b ott om of th e
SE RV ICE M EN U ho r izo nta l ly, s o th at th e OSD is po si tion ed on
th e scr e en c ent er . ( X=X’)
■
■■
■IF ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
IF adjustment Remote
control unit
IF 1
IF 2
IF 3
IF 4
1. R ecei ve a PAL colo ur b ar pa tter n .
2. En ter SE RVIC E M ENU.
3. Select I F 1 with FUNCTION ( / ) key
4. Pr ess BLU E key d ur ing I F 1 is h ig hl igh ted , I F 1 an d IF 2 va l ues
ar e ad ju sted au tom at ic al ly b y sof tw are.
5. If th e st and ar d i s L- p rim e, IF 3 and I F 4 val u es ar e ad ju stm ent
au tom at ic ally when B LUE key is press ed during I F 1 is
hig hlig ht ed.
FBT
FOCUS VR
SCREEN VR
R
e
f
e
r
e
n
ce
ba
r
Screen size
SE RV ICE MENU SCR EEN
XX’

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
16
■
■■
■AGC AUTOMAT ICALLY AD JUSTMENT
Item Measuring
instrument Test point Ad justment part Description
AG C
AUTOMATIC-
AL LY
adjust me nt
& check
Remote
control unit
AG C 1. En ter SE RVIC E M ENU.
2. Receive a 60dBμV R F sign al leve l.
3. Se le ct AGC with th e FUNCTI ON ( / ) key.
4. Pr ess BLU E ke y on th e r em ot e co ntr ol uni t.
5. Then the adjustment will be done automatically by software.
6. Se e th e AGC indica tor o n S ERVIC E MENU , it must b e “ 1”.
7. C heck th at p ict ur e i s nor mal a t 90 dB μV signal level.
■
■■
■DEFLECTION CIRCUIT ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
VERTICAL
LINEARITY
adjust me nt
Signal
generator
Remote
control unit
VLIN 1. Receive a PAL B/G circle pattern.
2. En ter SE RVIC E M ENU.
3. Select VLIN with the FUNCTION ( / ) key.
4. Ad ju st VL IN wit h t he FUNC TION ( / ) key un til circl e as
r oun d as p ossi ble.
R GB M O DE
HORIZONTAL
SHIFT
OFFSET
adjus tme n t
Signal
generator
Remote
control unit
RGBH 1. Input R/G/B circle pattern signal via vid eo input te rmin al.
2. Press AV key on the remote control u nit, force t he TV t o RGB
mode.
3. En ter SE RVIC E M ENU.
4. Select RGBH with the FUNCTION ( / ) key.
5. Adjust RGBH with th e FUNCTION ( / ) key until t he circle
p atter n i s h or izo nt ally ce nte r ed.( A=B)
6. C heck an d r ead ju st RGBH item if th e adjus tme nt b eco mes
imp rope r aft er som e oth er g eom et ric a dj ust m ents ar e d on e.
:11
IF INDICATOR AGC INDICATOR NONE
S
ERVI
C
E MEN
U
SC
REEN
AB

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
17
Item Measurin
g
instruments Test
p
oint Ad justment part Description
VERTICAL
SIZ E OFFSET
adjus tme n t
(60Hz)
Signal
generator
Remote
control unit
VS OF 1. R ecei ve a NTSC -M cr oss- h atch p atte r n of ve rt ic al fr eq u ency
60Hz.
2. En ter SE RVIC E M ENU.
3. Select VS OF with the FUNCTIO N ( / ) key.
4. Adjust VSOF with the FUNCTION ( / ) key until the
horizontal black lines on both the upper and lower part of the
p atter n b ecome ver y clos e t o t he u ppe r an d low er h or izon tal
si des of pi ctu re size a nd ne ar ly ab ou t to di sa pp ear .
5. C heck an d r ea djust VS OF item i f the ad justmen t b eco me s
imp rope r aft er som e oth er g eom et ric a dj ust m ents ar e d on e.
VERTICAL
POSITION
OFFSET
Ad ju st men t
(60Hz)
Signal
generator
Remote
control unit
VPOF 1. R eceive a N TSC -M ci rc l e p att er n of ve rti ca l fr equ en cy 60Hz.
2. En ter SE RVIC E M ENU.
3. Select VP OF with the FUNCTIO N ( / ) key.
4. Ad ju st VPO F with th e FUNCTIO N ( / ) key u ntil th e p ictu re
is vertically centered.(C=D)
5. C heck and r ead just v er tical p osition it em i f th e a dj ust me nt
b ecom es imp rope r a fte r so me oth er ge om etr ic adju stm en ts
ar e do ne.
Picture
size
10 0%
Scre en
size
Very clos e
Very clos e
C
D

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
18
Item Measurin
g
instruments Test point Ad justment part Description
HORIZONTAL
POSITION
OFFSET
adjus tme n t
(60Hz)
Signal
Generator
Remote
control unit
HPOF 1. Recei ve a NTSC -M circle p att er n sign al of ver t ica l f req ue ncy
60Hz.
2. En ter SE RVICE MENU.
3. Select HPOF with the FUNCTION ( / ) ke y.
4. Adjust HPOF wit h th e FUNCTION ( / ) ke y u ntil t he circle
p atter n i s h or izo nt ally ce nte r ed.( E=F)
5. C heck a nd re ad ju st a h or izon tal po si ti on i tem if th e
ad justm en t b ecomes i mp r op er aft er som e oth er g eomet ric
adjustments are done.
EF

No. 52054
A
V-21BT8ENS AV-21BT8EN
B
A
V-21BT8EPS AV-21BT8EP
B
A
V-21BT8EES AV-21BT8EE
B
A
V-21BT80E
P
19
■
■■
■GEOMETRY MENU ADJUSTMENT
Item Measurin
g
instruments Test point Ad justment part Description
VERTICAL
SIZ E
adjust me nt
(50Hz)
Signal
generator
Remote
control unit
VS IZ 1. Receive a PA L B/G cross- hatch p att er n of vertica l f r equenc y
50Hz.
2. En ter SE RVIC E M ENU.
3. Press the GREEN t hen e nter th e GEOMETRY MENU.
4. Select VS IZ (Vert ic al size) with th e FUNCTION ( / ) key.
5. Ad ju st VSI Z with the FUNCTION ( / ) key until th e
h orizon tal b lack lin es on bo th th e up per an d lo we r pa rt of the
p atter n bec om e ver y cl os e to t he u pp er a nd low e r h orizo nt al
si des of pi ctu re size a nd ne ar ly ab ou t to di sa pp ear .
6. C heck a nd r e adjus t VS2 B i tem if th e adju stment be com es
imp rope r aft er som e oth er g eom et ric a dj ust m ents ar e d on e.
VERTICAL
POSITION
adjus tme n t
(50Hz)
Signal
generator
Remote
control unit
VP OS 1. Receive a PA L B/G circ le p att ern sig nal of vert ic al f requ enc y
50Hz.
2. Enter GE OMETRY MENU.
3. Se le ct VP OS ( Ver tica l posi tio n) wit h t he FU NCTION ( / )
key.
4. Ad ju st VPOS wit h th e FUNCTION ( / ) ke y u ntil t he circle
pattern is vertically centered.(A=B)
5. C heck an d r ead just VP OS item i f th e ad ju stm en t bec om es
imp rope r aft er som e oth er g eom et ric a dj ust m ents ar e d on e.
HORIZONTAL
POSITION
adjus tme n t
(50Hz)
Signal
generator
Remote
control unit
HPOS 1. Receive a PA L B/G circ le patt er n sig nal of vertical freq ue ncy
50Hz.
2. Enter GE OMETRY MENU.
3. Se le ct HPOS ( Hor izo nt al po sit ion) wit h th e FUNCTIO N ( / )
key.
4. Adjust HPOS with the FUNCTION ( / ) key until the circle
p atter n i s h or izo nt ally ce nte r ed.( C=D)
5. C heck an d r ead just H POS it em if the a djust me nt b ecom es
imp rope r aft er som e oth er g eom et ric a dj ust m ents ar e d on e.
A
B
CD
Picture
size
10 0%
Scre en
size
Very clos e
Very clos e

No. 52054
A
V-21BT8ENS AV-21BT8ENB
A
V-21BT8EPS AV-21BT8EPB
A
V-21BT8EES AV-21BT8EEB
A
V-21BT80EP
20
■
■■
■WHITE BALANCE ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
WHITE
BALANCE
adjust me nt
(Low light)
Signal
generator
Remote
control unit
WR
WG
WB
1. R ecei ve a bla ck & wh it e si gn al (col o ur off ).
2. En ter SE RVIC E M ENU.
3. Select WR / WG / WB with t he ( / ) key, res pect ively.
4. Adjust WR / WG / WB with the FUNCTION ( / ) key ,
resp ectively, unt il th e whit e p art tu rn s to pur e whit e wit hout a ny
other color..
WHITE
BALANCE
adjust me nt
(High light)
Signal
generator
Remote
control unit
BR
BG
1. R ecei ve a bla ck & wh it e si gn al (col o ur off )
2. En ter SE RVIC E M ENU.
3. Select BR / BG with th e FUNCTION ( / ) key resp ect ively.
4. Adjust BR / BG with th e FUNCTION ( / ) key respectively
until the white part of screen make white colour.
It em WR WG W B
Recom mended value 04 0 04 0 04 0
It em BR BG
Recom mended value 03 0 03 1