JVC InteriArt AV28H20EUS User manual

No.51945
AV32H20EU
S
AV28H20EU
S
AV28H20EU
B
1COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
May 2002
AV32H20EUS
AV28H20EUS
AV28H20EUB
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
!SAFETY PRECAUT IONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 4
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････
･･････
･･･ 5
!MAIN DIFFERENCE LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････
･･････････････････････････
･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････････
･･････････････････････････････････････････
･････････････････････ 12
!PARTS LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････
･･
･31
★
OPERATING INSTRUCTIONS
★
STANDAR D CIRCUIT DIAGRAM ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････
････････････････････････････････
････････････････2- 1
SERVICE MANUAL
COLOUR TELEVISION
BASIC CHASSIS
MFⅡ
ⅡⅡ
Ⅱ

No.51945
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V32H20EUS
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V28H20EUS
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V28H20EUB
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SPECIFICATIONS
Content
Item
AV 32 H 20 EUS AV 28 H 20 EUS / AV 28 H2 0E UB
Dimensions ( W×
××
×H×
××
×D ) 85 5m m×5 50mm×5 68mm 78 0m m×5 09mm ×4 99mm
Mass 53 .6 kg 40 .2 kg
TV RF System CCI R (B/G ,D/K, I ,L , L ’)
Colour Sy st em PA L / SEC A M / N TSC (Only in EXT mo de )
St ere o Sy st em A2 (B/G,D/K )/ NICAM (B/G, I,D/K,L )
Teletext System FLOF (Fastext)
TOP (German system)
WST(W orld Standard system)
Receiving Frequency
VHF 47 MH z ～47 0M Hz
UHF 470MHz ～8 62MHz
French CAT V 11 6MHz ～1 72MHz / 22 0MHz ～469MHz
Intermediate Frequency
VIF Carrier 38.9 MHz (B/G, I ,L)/ 33.95MHz (L’)
SIF Carrier 33.4 MHz (5 .5MHz :B/ G) / 32.9 MHz (6.0 MHz:I ) / 32 .4MHz (6. 5MHz:L, D/K ) / 40 .45MHz (6.5MHz:L ’)
Colour Sub Carrier Fre
q
.
PAL 4.43MHz
SE CAM 4.40625MHz/4.25MHz
NT SC 3.58MHz / 4.43MHz
Power Input 220 – 240 V AC, 50Hz 220 – 240 V AC, 50Hz
Power Consumption 187W(Max) / 138W(Avg), standby : 2.6W 178W(Max) / 125W(Avg), standby : 2.6W
Aerial Input Term 75 Ωun ba lanc ed, C oaxial
Pictur e Tube Vi si ble si ze : 7 6cm , M eas ur ed di a gon ally Vi si ble si ze : 6 6cm , M eas ur ed di a gon ally
Hi g h Vo lt ag e 31.0kV (at zerobeamcurrent)
Spe ake r (16c m×4c m) ov al typ e ×2
Au dio Output 7.5 W + 7.5 W
EX T-1/EXT-2/E XT- 3
(Input / Output)
21 -p in E ur o c onn ecto r
(SCART socket)
S/ Video Y : 1V p-p POSITIVE (Negative sync Provided, when terminated with 75Ω)
C : 0.3Vp-p (Burst signal, when terminated with 75Ω)
EXT-4 (Input) Video
Au dio (L/R )
S/ Video
1V p- p 7 5 Ω( RCA pi n ja ck)
50 0m Vrms( -4dB s ) , High Im pe dan ce ( RCA pin jack )
Y : 1V p-p POSITIVE (Negative sync Provided, when terminated with 75Ω)
C : 0.3Vp-p (Burst signal, when terminated with 75Ω)
AUDIO OUT (Variable) 0～1 Vrms, Low Im p ed ance
( RCA pi n ja ck×2)
Headphone jack St er eo min i j ac k ( φ3.5mm)
Remote Control Unit RM-C54 H (A AA/R 0 3 d r y ba tte ry×2) : (A V3 2H 20 EUS, A V2 8H20 EU S)
RM-C50(A AA/R0 3 d r y bat ter y×2) : (A V28 H20 EUB)
Design & sp eci ficatio ns are su bje ct to change wi thout notice .
+1kV
-1. 5kV

No.51945
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■
■■
■21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
Pin
No . Signal Designation Matching Value EXT-1 EXT-2 EXT-3
1 AU DIO R o ut put 50 0m Vrms(Nom ina l),
Low impedance
○
(TV OUT)
○
(LINE OUT) NC
2 AU DIO R in put 50 0m Vrms(Nom ina l),
Hig h i mpe da nce ○○○
3 AU DIO L o utp ut 50 0m Vrms(Nom ina l),
Low impedance
○
(TV OUT)
○
(LINE OUT) NC
4 AUDIO GND ○○○
5 GND (B) ○○○
6 AUDIO L input 500mVrms(Nominal),
Hig h i mpe da nce ○○○
7Binput 700mV
B- W , 75Ω○○NC
8 FUNCTION SW
(SLOW SW)
Low : 0-3V, High : 8-12V, High
impedance
○○○
9 GND (G) ○○○
10 SCL3 NC ○NC
11 G in put 70 0mVB- W , 7 5Ω○○NC
12 SDA3 NC ○NC
13 GND (R) ○○○
14 GND (YS)○NC NC
15 R / C input R : 700mVB- W , 7 5Ω
C : 300mVP- P , 75Ω
○
(only R)
○○
(only C)
16 Ys i n put Low : 0 - 0.4, High : 1 - 3V, 75Ω○ NC NC
17 GND(VIDEO output) ○○○
18 GND(VIDEO input) ○○○
19 VIDEO ou tpu t 1V P- P( Nega ti ve g oin g sync ), 75 Ω○
(TV)
○
(LINE OUT) NC
20 VIDEO / Y input 1V P- P( Nega ti ve g oin g sync ), 75 Ω○ ○ ○
21 COMMON GND ○○○
[Pin assignment]

No.51945
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SAFETY PRECAUTIONS
1. The d esi gn of th is pr od uct con ta in s sp eci al 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 l ess 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 i n th e or igin al
ci rcu it s. S er vice sho ul d b e p erfor med by qu alif ied p ers on nel
on ly.
2. Al te r ati on s of t he desig n or ci rcui tr y of t he pr od ucts sh oul d not be
made. Any design alterations or additions will void the
m anu fact ur er's w arr a nt y and will f ur th er r elieve t he ma nu factu r er
of r esp onsi b ility for per so na l injury or p rop er ty d am ag e r esult in g
th er efr om .
3. M an y e lectr ical an d m ech ani ca l p ar ts i n 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 i nsp ecti on n or ca n t he pr o 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, watt ag e, etc. Rep l acem en t
p arts wh ic h ha ve th ese sp eci al s afet y ch ar act 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 r ep la cem en t which do es n ot
h ave th e same saf ety ch ar act er ist ics as t he r eco mmen de d
r eplac ement par t sh own i n th e p ar ts l ist of S er vi ce 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. The
diff er enc e of th e G ND i s sho wn b y th e LIV E : (") side GND, the
ISO LATE D(NEUTRAL) : (#) side G ND and EARTH : ($) side
GN D. Do n't sh or t b et we en th e LIV E si d e GN D an d
ISO LATE D(NEUTRAL) side GND or EARTH sid e GND and
n ever mea sur e wit h a m ea sur ing a ppa ratus ( oscillo scop e etc.)
th e LI VE sid e GN D an d IS OLA TED(NE UTRAL ) sid e G ND or
EARTH side GND at the 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 ting shou ld b e ch ecke d or adj u ste d (Se e
ADJU STM ENT OF B 1 POW E R SUPPL Y).
6. The high volta ge app lie d t o th e pictu r e tu be mu st con for m wit h
th at sp ecifi ed in S er vi ce m an ual. E xcessive h igh vo lt ag e ca n
cau se an incr e ase i n 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
prevent ed. If s evere arc ing occur s, remove t he AC power
immed iate l y an d de ter mi ne th e ca use b y vi sua l insp ect io n
( in cor rect in stallat i on, cr acke d or m elte d high vo lt age har n ess,
p oor so ld er ing, et c.) . To maint ai n the p rope r min im u m l e vel of
sof t X- Ray em issi on, c omp on en ts i n th e high vol tag 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 i ves 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
m eter or a hig h v oltag e pr ob e wit h a V TVM . Discha rg e th e
picture tube before attempting meter connection, by connecting
a clip le ad to th e gr ou nd f ra me a nd c onn ecti n g th e oth er end of
the lead through a 10k
Ω2W resi sto r to the an od e b utt on .
8. W hen se r vice i s r equ ir e d, ob ser ve th e or igina l l ea 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 dr ess in th e
hig h voltag e cir cuit a r ea. W her e a s hor t ci rcuit h as occu rre d,
th ose co mp on ent s tha t i ndica te evide nce of ove rhea ting sho uld
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 isol at io n
ch eck on the expo sed me tal p ar ts of t he cabin et ( a nte nn a
ter m ina ls, vid eo /au di o inpu t and ou tpu t t er min al s, Con tr ol kn obs,
m etal cabi n et, scr ewhe ad s, ea rph one jack, con tr ol shaf ts, etc.)
to be su re th e p rodu ct is s af e t o o pe r ate 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 im a 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 aving a
r etu rn p ath to t he chass is sho uld withs tan d a vol t 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 plianc e
r ate d up to 12 0V , an d 3 00 0V AC (r.m. s.) to an ap plian ce r at ed
200V or more, for a period of one second.)
This method of test requires a t est equipment n ot g enerally found
in t he ser vic e tr ade.
(2) Leakage Current Check
Pl ug th e A C lin e c ord d ir ect l y in to th e A C ou tl et ( d o n ot use a li n e
isol atio n tr ansf or mer du rin g this ch eck.) . U sin 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 art 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 pa th to t he chassis , t o a known go od ea rt h
gr ou nd (wa 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 area , th is mu st no t exce ed 0.2 mA AC
(r.m.s.).
"
""
"Alte rnate Che ck M ethod
Pl ug th e A C lin e c ord d ir ect l y in to th e A C ou tl et ( d o n ot use a li n e
isol atio n tr an sfor mer during t hi s che ck.) . Use an AC vo lt me ter
h avi ng 1 00 0 oh ms pe r volt or mor e sens it ivity i n th e fo llow ing
m ann er. Con nec t a 1 50 0Ω10W res ist or para ll e 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 arth gro un d (wa ter pipe , etc.) . M eas ur e th e A C vo lt ag e
acr oss th e r es ist or with th e AC vo l tm eter . M ove th e r esistor
con nec ti on to e ach exp ose d me tal par t, p art i cular ly a ny exp osed
m etal p ar t havi n g a r etu rn pat h to t he ch assis, an d m easu r e th e
AC voltag e ac ro ss the r es ist or . N o w, re verse th e pl u g i n th e AC
ou tl et and r e pe at eac h m ea sur emen t. An y vol t ag e me asu re d
must not e xc eed 0 .75V AC (r.m. s.). This c orresponds to 0.5mA
AC (r.m.s.).
However, in tropical are a, 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 R T
ACVOLTMETER
(HAVING 1000 Ω/V,
OR MOR E SENSITIVITY)

No.51945
A
V32H20EUS
A
V28H20EUS
A
V28H20EUB
5
FEATURES
"New chassi s d esign ena ble us e of an i nte rac tive on scr een
control.
"The TELETEXT SYSTEM has a built-in FASTEXT (UK system),
TOP (German system) and W ST (world standard system)
system.
"Be caus e th is TV un i t cor resp on ds t o m ultiple x broa dca st, u sers
can enjoy music programs and sporting events with live realism.
In ad di tion , BI LIN GUAL pr o gram s can b e h ear d in th eir or ig in al
language.
"Users can make VCR dubbing of picture and sound by controlling
th e AV selec tor to se le ct an o pti o na l so urc e at th e EXT- 2 outp ut
sh own in fi gu re.
MAIN DIFFERENCE LIST
!ModelName
Par t Name AV32H20EUS AV28H20EUS AV28H20EUB
MAIN PWB ASSY SMF-1401A-U2 SMF-1402A-U2
POWER & DEF PWB ASSY SMF-2401A-U2 SMF-2402A-U2
CRT SOCKET PWB ASSY SMF-3401A-U2 SMF-3402A-U2
FRONT C ONT ROL PW B AS SY SMF- 84 01 A- U2 SMF- 8402A- U2
!FRONT C ABINET ASSY LC 1037 6-020A-U LC 10662- 023A-U LC 10662- 024A-U
!DOOR LC 20 265- 01 7A-U LC 20 265- 02 4A-U
!POW ER KNOB LC 30 578- 00 7B-U LC 30 578- 00 4A-U
!REAR COVER LC10378-004B-U LC10664-003B-U LC10664-001E-U
JVC MA RK LC 40 354- 00 3A-C LC 40 354- 00 1C- C
!RATING LABEL LC20379-027A-U LC20379-026A-U LC20379-025A-U
EURO LAB EL AEM 10 52-0 63-E AEM 1052-0 64-E AEM 10 52-0 96-E
REMOTE CONTROL UNIT RM-C54H-1C RM-C50-1C
TV EXT-1 EXT-3
EXT-2
EXT-4

No.51945
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V28H20EUB
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. U np lu g t he po we r c or d.
2. R emove t he 1 2 ( 28 ” m od els), 13 ( 32 ” m ode l) scr ews ma r ked A
as s hown in t he Fig. 1.
3. W ithdra w t he r ear co ver to wa rd you .
REMOVING THE CHASSIS
"After removing the rear cover.
1. Sl ight l y r aise th e bo th side s of th e c hassis by h and and r e mo ve
th e t w o cl aws u nd er th e b oth si d es of the ch assis fr om t he fr o nt
cab i net .
2. W ithdra w t he chass is backw a rd .
(If necess ary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER
"After removing the rear cover.
1. Remove t he 2 screws mar ked B, and r emove th e sp eake r hold er
as s h own in Fig. 1.
NOTE : W hen removing t he screws mar ked Bof t he sp eake r
remove t he lower side screw first, an d t hen remove th e
up per one .
2. Remove the 2 screws Ca ttac hing th e sp eak er .
3. Follow th e s am e st eps wh en r emoving th e oth er ha nd spe ake r.
REMOVING THE AV TERMINAL BOARD
"After removing the rear cover.
1. Remove th e 3 screws mar ked D as shown i n t he Fig . 1 .
2. R emove th e 2 cla ws mark ed Eunder the CHASSIS as shown in
Fig. 2.
3. Remove the AV TERMINAL BOARD slightly in the direction of
arrow Fas shown in Fig. 2.
REMOVING T HE POWER & DEF PWB
"After removing the rear cover.
"After removing the rear CHASSIS.
1. Remove th e 3 screws mar ked G.
2. Remove th e PO W ER & DEF PW B.
CHECKING THE PW BOARD
To ch eck the b ack side of th e PW B oar d.
1) Pull out the chassis . (Refer to RE MOVING THE CHAS SIS).
2) Erect the c hassis vertically so that you c an easily check the
b ack side of th e PW B oar d.
[CAUTION]
"When erec ting the chassis, be careful s o 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 sur e t ha t the wire co nn ecto r is
pr op erly con nec ted .
"W hen co ndu cting a ch eck w ith p ow er su pplied , b e sure to c onfir m
th at t he CRT E AR TH WI RE (B RA IDED AS S’Y) is co nne cted t o
th e CRT SOC KE T PW b oar d.
WIRE CLAMPIN G AND CABLE T YING
1. Be sure t o clamp th e wire.
2. N ever r em o ve th e c abl e tie use d f or tying th e w ire s to ge the r.
Should it be inadvert ent ly removed, be sure to tie the wires with
a n ew c abl e ti e.
AV SW PW B
E
Fig. 2
AV TERMINAL
BOARD
E

No.51945
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7
Fig. 1
REAR COVER
FRONT CABINET
SP EAKE R
CRT
SOCKET
PWB
FRONT
C ONT RO L
PWB(1/2 )
MAIN
PWB
POWER & DEF.
PWB
CLAW
CLAW
CHASSIS
AV TERMINAL
BOARD
B
POWER CORD
C
(
×2
)
A
(×13 : 32” m od el)
D
(
×3
)
(
×2
)
FRONT
C ONT RO L
PWB(2/2 )
AV SW
PWB
This expl o de d view descr ibe s ab out
AV 28H2 0EUS / AV 28 H2 0EUB.
Al th ou gh AV 32 H20E U S ar e slight l y
diff er ent from t his f igur e, you c an use
th e e xplod ed view f or disass em bli ng
th e A V32 H20E U S in sam e ste p as
AV 28H2 0EUS / AV 28 H2 0E UB .
(×12 : 28” m od els)
G
(
×3
)
MICOM PWB
1
00
Hz PWB

No. 51945
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REMOVING THE CRT
∗Rep lacem en t of th e CRT sho uld be p er for med b y 2 or more
p ers ons.
•Af ter removing the c over, chassis etc.,
1. Pu tting th e C RT c han ge ta ble o n sof t cl oth , th e C RT cha ng e ta bl e
sh ould also b e c overe d with s uch soft clot h ( sho wn in Fig. 3).
2. W hile kee pi n g th e s urf ac e of CRT dow n , m ou nt the T V s et o n t he
CRT change table balanced will as shown in Fig.4.
3. Rem ove 4 sc re ws mar ke d by arro ws with a b ox typ e scr e w dr iver
as s hown in Fig. 4.
•Si nc e th e cab inet will drop w h en screws h ave b een r emo ve d, b e
sure t o su pport t he cabin et with h ands.
4. After 4 screws have been removed, put the cabinet slowly on
cloth (At this time, be carefully so as not to damage the front
sur fac e of th e c abin et) sh ow n i n Fi g.5 .
•The CRT sh ould b e ass em bled accor din g to th e o pp osite
sequence of its dismounting steps.
∗The C RT cha ng e t ab le sh ould pr ef er ab ly b e sm aller t hat th e CR T
sur fac e, and its h ei gh t b e abo ut 35c m.
CRT CHANGE TABL E
CLOTH
AP PROX.
35 cm
CRT
CRT
CHANGE
TABLE
BOX
TYPE
SCREW
DRI VER
Fig. 3
Fig. 5
CRT
CABINET CRT
CHANGE TABLE
Fig. 4

No.51945
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V32H20EUS
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9
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 par t, melt th e s ol der ad equ ate ly.
4. D o n ot r euse a ch ip 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 i ron is r ec om mend ed for easily r emovi ng p ar ts.
!REPLACEMENT STEPS
1. How to remove Chip parts
#
##
#Resi st ors, ca pa cit ors , et c
( 1) As sh own i n t he f ig ure, pu sh th e pa rt with tw ee zer s and
alte rn at el y m elt th e sol de r at each en d.
( 2) Sh if t with tweeze rs an d r em o ve th e ch ip p ar t.
#
##
#Tran s 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 i n t he f ig ure, pu sh th e pa rt with tw ee zer s and
alte rn at el y m elt th e sold er a t each l e ad . S hi ft an d r emove t he
chip part.
Note : Afte r removing t he part , remove remain in g solder from the
pattern.
2. How to install Chip parts
#
##
#Resi st ors, ca pa cit ors , et c
(1) Apply solder to th e pattern a s indic ated in the fig ure.
( 2) Gr asp t he ch i p p art with tw ee zer s 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 chip par t.
#
##
#Tran s ist ors, d iodes , va ria bl e r es ist or s, et c
(1) Apply solder to th e pattern a s indic ated in the fig ure.
( 2) Gr asp th e ch ip p art w it h t we eze rs an d p lace it on th e so lder.
(3) First solder lead Aas indica ted in t he figure.
( 4) The n so ld er le ads Band C.
SOLD E R SOLD E R
A
B
C
A
B
C

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REPLACEMENT OF MEMORY ICs
1. Memory ICs
This TV use memory ICs. In the memory ICs, there are memorized data
for cor rectly op eratin g th e vid eo an d def l ection cir cu its . W h en r ep lacing
memor y ICs, b e s ur e t o us e ICs writte n with th e initial values of da ta.
2. Procedure for replacing memory ICs
PROCEDURE
(1) Power off
Sw itch the p ow er of f an d un plug th e p ower cor d f ro m t he ou tl et.
(2) Repla ce ICs.
Be sure to use memory ICs written with the initial data values.
(3) Power on
Pl ug th e p ower c or d int o th e ou tlet a nd sw it ch t he po we r on .
(4) Check and set SYSTEM CO NSTANT SET :
*
**
* It must not adjust without s ignal.
1) Pr ess th e IN FO RMATI ON ke y an d th e MUT ING key of th e
REMOTE CONTROL UNIT simultaneous ly.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
3) W hile th e S ERVICE ME NU is d is playe d, pr es s th e
INFORMATION key and MUTING key s imult aneously, and t he
SYSTEM CONSTANT SET screen of Fig. 2 will be displayed.
4) Check th e se tting va lu es of the S YSTEM CON STA NT SET of
Table 1. If the value is dif ferent, select the s etting item with th e
FUNCTION UP/ DOWN key, and s et the c orrect va lue with th e
FUNCTION -/+ key.
5) Press the MENU key to memorize the setting value.
6) Pr ess t he INFOR MATION ke y t wi ce, a nd retu rn t o th e no rmal
screen.
(5) Se tting of re cei ve channe ls
Se t th e r ec ei ve ch an ne l.
For setting , refer to the OPE RATING INS TRUCTIONS.
(6) User se tt ings
Check th e us er sett in g val ues of Tab le 2, an d if sett in g val ue is
diff er ent , set th e c orr ec t valu e.
For setting , refer to the OPE RATING INS TRUCTIONS.
(7) Setting of SERVICE MENU
Ve rif y the set ting it ems of th e SE RVICE ME NU of Tab le 3, an d r ese t
where necessary.
For setting, ref er to the SERVICE ADJUSTMENTS.
Na mes of ke y
i
ii
i
▼
▼
▼
▼
INFORMATION
MUT ING
FUNCTION UP/DOWN
ME NU
FUNCTION -/+
ke y
OK
NAME OF REMOTE CONTROL KEY
SE RV ICE MENU
1. IF 2. V/C
3. A UDIO 4. D EF
5. VSM PRESET 6. STATUS
7. P IP 8. -- -
9. SHIPPING (OFF) 0. BUS FREE
1 -9 : SE LE CT
i : EXIT
Fig.1
SYS T EM C ONS TA NT S ET
1. DESTINATION EU
- /+ : STORE i : EXIT
Fig.2
OK

No. 51945
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SETT ING VALU ES OF SYST EM CONSTANT SET (TABLE 1)
Setting item Setting content Settin
g
value Setting item Setting content Settin
g
value
DESTINATION EU DOLBY NO
CRT TYPE 16 :9 BB E YE S
PURITY NO PROGRESSIVE NO
PICTURE TILT YES TDA9178 NO
DIGIP URE PRO NO TONE I C NO
PIP NO FLAT YE S
PIC&TE XT NO
USER SETTING VALUES (TABLE 2)
PICTURE SE TTING EX T SETTI NG
TINT COOL
CONTRAST / BRIGHT
SHARP / COLO UR
ID
S-IN
DUBBING
BLANK
BLANK
EXT-1→EX T-2
PICTURE FEATURES FEATURES
DIGITA L VNR AUTO
COLO UR S YSTE M TV : Acco rd in g t o p r eset C H
EXT : AUTO
4:3 AUTO ASPE CT PA NO RA MIC
SL EEP TIME R
BL UE BA CK
OFF
ON
SOUND SETTING INSTALL
BA SS / TREBL E / BA LANCE LA NG UA GE ENGL ISH
HYPE R S OUND
BB E
OFF
ON
EDIT/MANUAL PRESET CH only
The ot her s : BLA NK
SERVICE MENU SETING ITEMS (TABLE 3)
Setting item Setting value Setting item Setting value
1. IF
1. VCO
2. ATT ON/OFF
4. DEF.
1. V-SHIFT
2. V-SIZE
3. H-CENT
4. H-S IZE
5. TRAPE Z
6. EW -PIN
7. COR-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11 . BOW
12. V-S.CR
13 . V- LIN
2. V / C
1. RGB BLK
2. W DR R
3. W DR G
4. W DR B
5. BRIGHT
6. CONTRAST
7. COLO UR
8. HUE
9. SHARP
10. VCO A DJ .
11. VID AGC
12 . SY C SL I
13 . A M OV IE
3.A UDIO
(Do not adjust)
1. ERR LI MIT
2. A2 ID THR
3. Q-PEA K
9.S HI PPI NG
(Do not adjust) ON/OFF
5. VSM P RE SET
COOL
NORMAL
WARM
1. CONT.
2. BRIGHT
3. SHARP
4. COLO UR
5. HUE
6. W DR R
7. W DR G
8. W DR B
6.S TATUS
(Do not adju st)
VP S
PDC
CENTER
REFER to VSMPRESET
EKEU EI
4:316 :9
YE SNO
YE SNO
YE SNO
1TUNERNO
YE S
NO
YE SNO
YE SNO
YE SNO
YE SNO
YE S
NO
YE SNO
2TUNER
＊
＊＊
＊: Do not adjust

No. 51945
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SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There ar e 2 w ays of adjusting this TV: One is wi th t he
REMOTE CONTROL UNIT and the other is the conventional
method using adjustment parts and components.
2. The setting (adjustment) using the REMOTE CONTROL
UNIT is made on the basis of th e initial setting va lues. The
se tting va lues whic h a dj ust the sc ree n to t he opt imum
condition can be different from the initial setting values.
3. Make s ur e th at conn ect ion is c orrect ly made t o AC power
sourc e.
4. Tur n on th e powe r of th e TV a nd m easu r in g i nstr umen t for
war min g u p f or at l east 30 m in ut es b ef or e sta rt in g adj u stm ent .
5. If th e rec ei ve or inp ut sig nal is not sp ecifi ed , use t he m ost
ap pr op ria te s ig na l f or a dj ust me nt.
6. N ever tou ch p ar ts ( such as var iab le r esist or s, tr an sform ers an d
condensers) not shown in the adjustment items of this service
adjustment.
7. Pr ep ar atio n f or ad justm en t ( pr es etti n g):
Unless oth er wis e sp ecifi ed in th e a dj ust me nt it em s, p r ese t th e
follo win g fu nct io ns with th e REMOTE CO NTROL UNI T.
"Setting p osit ion
PICTURE MODE (VSM) NORMAL
SLEEP TIMER OFF
TONE BALANCE CENTER
ZO OM FUL L
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Sign al g enerat or (P att ern g enerat or) [ PAL / SE CA M / NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
●Check in g i t ems.
●Adjustment of FOCUS & SCREEN
●VS M p r eset ad ju st s ettin g.
●VIDEO / CHROMA circ uit adjustment.
●DEFLECTION c ircuit adjustment.
●AUDIO circuit adjustment. (Do not adjust)

No. 51945
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ADJUSTMENT LOCATIONS
E1
CN014
CN013
TP-E
CRT SOCKET PWB
(
SOLDER SIDE
)
TOP
FRON T
MAIN PWB POWER&DEF PWB
FRON T
CN001
AV SEL PWB
TUNER
CN002
WDEG
1pi n:B1(T P-91)
2pi n:NC
3pin:X-ray
4pin:X-ray
5pi n:T P-E
5
1
X
FRONT CONTROL PWB
(
1/2
)
FRON T
HV
TP-47B
CN014
CN013
SP R
PW
F901 POWER SW
SP L
MIC OM
100Hz
CN002
F
JJ
CN004
CN005
CN006
TP-Y
FRONT CONTROL PWB
(
2/2
)
FO CUS 2
SCREEN
FO CUS 1
32"MODEL
SCREEN
FO CUS
28"MODEL
UP DOWN
S
REMOCONLED
VL
HP R
HVT

No. 51945
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BASIC OPERATION SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. SERVICE MENU ITEMS
W ith the SER VI CE M ENU, variou s sett in gs ( ad ju stm en ts) c an b e m ade , a nd th ey a re b road l y c la ssif ied i n th e f ol low ing ite ms of set tings
(adjus tments ):
(1) 1. IF ･･･････ ･････････････ ･･･ This m od e a djust s the se tting valu es of th e I F circu it .
(2) 2.V /C ･･･････ ･････････････ ･･ This mode adjust s the setting valu es of th e VIDEO / CHROMA circuit.
(3) 3.AUDIO･･･････ ････････････ This mode adjusts the setting values of the multiplicity SOUND circuit.
(4) 4. DEF ･･･････ ･････････････ ･ This m od e adj ust s th e se tti ng val u es o f th e DE FLECTION ci rcuit f or eac h as pect mod e g ive n be lo w.
FULL (100/120Hzi)
PA NO RA MIC ( 100 /12 0H z i )
SUBTITLE (100/120Hzi)
COMP RE SS (Fixed va lu e) ( 100 /1 20Hzi )
(5) 5.V SM PR ESE T･･･････ ･･････ This m od e adjust s th e i n iti a l s ett in g va lues of CO OL, N ORM AL an d W ARM .
(VSM : Video Status Memory)
3. BASIC OPERATION OF SERVICE MENU
(1) How to enter SERVICE MENU
Press the “INFORMATI ON” key and th e “MUTING” key of the
REMOTE CONTROL UNIT simultaneous ly, and the
SERVICE MENU screen of Fig.1 will be displayed.
(2) Selection of SUB MENU SCREEN
Press one of keys 1～5 of the REMOTE CONTROL UNIT
an d sele ct th e S UB MEN U S C REEN ( See Fi g. 3 ), fo rm th e
SERVICE MENU.
SERVICE MENU →SUB ME NU
1. IF
2. V / C
3. AUDIO
4. DE F.
5. VS M PRESE T
6. STATUS
7. PI P
8. ---
9. SH IP PING ( OFF)
0. BUS FREE
Names of ke
y
i
ii
i
▼
▼
▼
▼
INFORMATION
MUT ING
FUNCTION UP/DOWN
ME NU
FUNCTION -/+
ke
y
OK
SE RV ICE MENU
NAME OF REMOTE CONTROL KEY
Fig.2
SE RVIC E ME N U
1. IF 2. V/C
3. AUDIO 4. DEF
5 . VS M PR ES ET 6 . ST ATU S
7. PIP 8. ---
9. SHI PP ING (OFF) 0. BU S FR EE
1-9 : SEL ECT
i : EXIT
Fig.1
＊
＊＊
＊: Donotadjust

No. 51945
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15
1. RGB BLK
2. WDR R
3. WDR G
4. WDR B
5. BRIGHT
6. CONTRAST
7. COLO UR
8. HUE
9. SHARP
10.VCO ADJ
11.VID AGC
12.SYC SLI
13.A MO VIE
SE RVICE M ENU
V/C
1. RGB_BLK
****
2. V/C
PAL
- / + : STORE i : EXIT
DE F *** Hz FULL
1. V- SHIFT
4. DEF
***
- / + : STORE i : EXIT
1. V- SHIFT
2. V- SIZE
3. H-CENT
4. H-SIZE
5. TRAPEZ
6. EW -P IN
7. COR-PIN
8. COR-UP
9. COR-L O
10.A NGLE
11.B OW
12 .V- S.CR
13.V-LIN
IF S ER VICE MENU
1. VCO
2. AT T ON/O FF
1-2 : SELECT i : EXIT
SERVI CE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP (O FF) 8. - - -
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT : E XITi
1. ERR L IMIT
2. A2 ID THR
3. Q P EAK
AUDIO
3. AUDIO
1. ERR LIMIT 100H
ERROR RATE =
* ** *** **
- / + : STORE i : EXIT
1.IF(V CO)
COOL
NORMAL
WARM
5. VSM PRESET
VSM PRESET NORMAL
1.CONT ***
- / + : STORE i : EXIT
1. CONT.
2. BRIGHT
3. SHARP
4. COLO UR
5. HUE
6. WDR R
7. WDR G
8. WDR B
Do no t move
Do no t adjust
OK
OK
OK OK
Fig.3 SUB MENU SCREEN

No. 51945
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( 3) M eth od of Set ti ng
1) M eth od of Set ti ng 1. IF
[VCO] ･･･････ ･････････････ ････････････ ･･･ It mus t not adjust wit hout sig nal.
①1 K ey･･･････ ･････････････ ････････････ Select 1.IF.
②1 K ey･･･････ ･････････････ ････････････ Se lect 1 .VCO(CW)
Makesurethat thearrow positionbetweenthe ABOVE REFandBELOW REF.
③INFORMATION K ey ･･･････ ････････････ Return t o the SERVICE MENU scre en.
2) M eth od of s ett in g 2.V/C, 3.AUDIO, 4.DEF an d 5 .VSM PRESET.
①2～5 K ey･･･････ ･････････････ ･････････ Select one from 2.V/C, 3.AUDIO, 4.DEF an d 5 .VSM PRESET.
②FUNCTION UP / DOWN ( / ) Key ･････ Sele ct s etting items.
③FUNCTION -/+ ( / ) Key ･･･････ ･･････ Set (adjust) the setting values of the setting items.
④ME NU Key ･･･････ ･････････････ ･･･････ Memorize the s etting value.
( Bef or e st or in g t he sett in g val ues i n m em ory, do no t pr es s th e CH, TV, POW E R ON /
OF F ke y - if you d o, t he value s w ill n ot be stor ed in me mo ry. )
⑤INFORMATION K ey ･･･････ ････････････ Retu rn t o th e SE R VICE M E NU scree n.
3) Do not setting6.STATUS, 7.PIP, 8.--- , 9.SHIPPING(OFF) & 0.BUS FREE.
(4) Rele as e of SER V IC E M E NU
1) Af ter co mp leti ng th e se tting , r et ur n t o t he SER VIC E ME NU, th en ag ai n p r ess th e I NFORMAT IO N ke y.

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ADJUSTMENTS
CHECK IT EM
Item Measuring
instrument Test
p
oint Ad justment part Description
B1
Power Su
pp
l
y
che ck
Signal
generator
DC v o ltm et er
Remote
control unit
TP-91(B1)
TP-E(#
##
#)
[X connector
on POWER
DE F PW B ]
1.R G B BL K 1. R ecei ve a an y br oa dca st.
2. Pu sh t he “ZOOM ” ke y an d s el ect the F ULL m ode .
3. Select 2 . V/C from th e SERVICE MENU.
4. Select 1 . RGB BLK with f unction UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. C on nect a D C vol tm et er t o TP- 9 1(B 1) a nd TP- E( #).
7. M ake sur e t hat th e volt ag e is DC13 9.9 ±2.0V.
8. Press the fun ction – ( ) key t o return to service menu..
Hi g h Vo lt ag e
che ck
Signal
generator
DC volunteer
Remote
control unit
CRT anode
Chass is
GND
1.R G B BL K 1. R ecei ve a an y br oa dca st.
2. Pu sh t he “ZOOM ” ke y an d s el ect the F ULL m ode .
3. Select 2 . V/C from th e SERVICE MENU.
4. Select 1 . RGB BLK with f unction UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. Connect a DC voltmeter to CRT ANODE and chassis GND.
7. M ake sur e t hat th e volt ag e is DC 3 1.0 kV .
8. Press the fun ction – ( ) key t o return to service menu.
VC O ch ec k Remote
control unit
1. VCO "Und er n orma l c ond itions, no ad just me nt i s r e quir ed .
"Conf irm at io n a dj ust me nt.
1. Select 1 .IF f rom t he SERV ICE MENU.
2. Then select 1 .VCO from th e IF SERVICE MENU.
3. R ecei ve an y br o adc ast.
4. C heck t he a rrow ( ←
←←
←) p osi tion be tw een th e AB OVE R EF . an d
BE LOW REF.
+1kV
-1.5kV
TO O HI GH
ABOVE REF
JUST REF
BELOW REF
TO O LO W
i : EXIT
VCO(CW) **** MHz
MAI N
1. VCO
2. ATT ON/OFF
i : EXIT
IF SERVIC E MEN U
1-2 : SELECT
(Do not move)

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FOCUS & SCREEN ADJUSTMENT
Item Measuring
instrument Test point Ad justment part Description
FOCUS
adjust me nt
[28” MODEL]
Signal
generator
FOCUS VR
[In HVT]
[28”MODEL]
1. R ecei ve a cr oss -h atc h sign al.
2. Press the “ZOOM” key and s elect the FULL mode.
3. W hile w atc hi ng th e scr een , a dj ust th e FOC US VR to m ake th e
ver ti cal and ho rizo nta l lin es as f in e a nd sha rp as possib le.
4. M ake sur e th at when the sc re en i s d ar ke ned , the lines re ma i n
in good focus.
FOCUS
adjus tme nt
[32” MODEL]
Signal
generator
FOCUS 1
FOCUS 2
[In HVT]
[32”MODEL]
1. Receive a cr oss- h atch signa l.
2. Pu sh t he “ZOOM ” ke y an d s el ect the F ULL m ode .
3. By t ur nin g th e FOCUS2 VR , and a dj ust t he p ict ur e s o tha t th e
“ “ part vertical line may become thinnest.
4. By t ur nin g th e FOCUS1 VR , and a dj ust t he p ict ur e s o tha t th e
3r d h or izont al line fr om t he upp er m ay bec om e un i for m a t th e
lin e c ent er an d its pe riph er y.
5. C arry out ad j ustm en t b y r ep eat in g the ste ps 3 an d 4 ab ove .
6. M ake sur e th at when the sc re en i s d ar ke ned , the lines re ma i n
in good focus.
SCREEN
Ad ju st m en t
Signal
generator
SCREENVR
[In HVT]
1 Pr ess a w h ole b la ck sign al
2 Press the “ZOOM” key and s elect the FULL mode.
3 Select 2. V/ C from th e SERVICE MENU.
4 Tur n t he SCREEN V R clockwis e f rom th e f ull co unt er
cl ockw is e p ositi on an d st op i t a t th e po int wh er e “ CLOW ” stat us
(marke d in Fig.) ch ang es f rom 1 t o 0 to 1 (which is
indic ated at the 3rd colu mn from the right.)
5 The n t ur n th e SC RE EN V R cou nt erclo ckw is e, an d st op wh er e
th e “ CLOW ” stat us ch an ges 1 t o 0
＊“ CLOW ” : c ontr o l loop ou t of w in do w.
SCREEN VR
HVT
FOCUS VR
V/C
1. RGB BLK
00
CLOW
statu s
- / +
: STORE i : EXIT
OK
0 0 0 0 0 1 0 0
PAL
SERVICE MODE SCREEN
FOCUS1(F1)
SCREEN1(S1)
FOCUS2(F2)
HVT
FOCUS 2
FOCUS 1

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VSM PR ES ET AD JUS T S ET TIN G
Item Measurin
g
instrument Test point Ad justment part Description
VS M PRE SET
se tting
Remote
control unit
1. CONT .
2. BR IG HT
3. SHARP
4. COLOUR
5. HUE
6. W DR R
7. W DR G
8. W DR B
1. S elect CO OL with the MENU key of t he remote control unit.
2. Se le ct 5 .VS M P RESET from th e S ERVICE ME NU.
3. Ad ju st t he FUNCTIO N UP/DOWN ( / ) an d -/+ ( / )ke y to
br ing th e set va lues of 1.C ON T ～8. W DR B to the va lues
sh own in th e ta bl e.
4. Pr ess the ME NU key a nd m emor iz e th e s et va l ue.
5. Respectively select the VSM PRESET mode for NORMAL and
W ARM, an d m ake simil ar a dj ust me nt as in 3 abo ve.
6. Pr ess the ME NU key a nd m emor iz e th e s et va l ue.
＊Refer t o OP ERATING I NS TRUCTIONS for th e PICTURE
MO DE .
1.CONT. 2.BRIGHT 3.SHARP 4.COLOUR 5.HUE 6.WDR R 7.WDR G 8.WDR B
COOL +16 0 -10 +1 0 -27 -12 0
32 ” NORMAL 00-1000000
WARM -13 0 -12 -1 0 +5 0 0
COOL [phone]
28 ” NORMAL -30-1200000
WARM -13 0 -12 -1 0 +4 0 0
SE TTING VALUES OF VSM PRESET

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VIDEO / CHROMA CIRCUIT ADJUSTMENT
The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.
The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
Setting item
(Adjustment item) Initial set ting v al ue
2. V/C PAL SE CAM NT SC
1.R G B BL K
2.WDR R 00 00
3.WDR G 00 00
4.WDR B (Do not adjust) -012
5. BR IG HT 00 00
6.CONTRAST 00 60
7.COLO UR 00 00
8. HUE 00 20
9.SHARP (Do not adjust) 00 07
10.VCO ADJ. (Do not adjust)
11 .VI D AGC (Do not ad just) 00 00
12.SY C SLI (Do not adjust) 00 07
13.A MOVIE (Do not adjust) 00 01
＊
＊＊
＊: Do not adjust