JVC AV28BH7ENS User manual

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No.51967
AV28 BH7 ENS / AV28BH7EN
B
AV28BH7EPS / AV28BH7EP
B
AV28 BH7EES / AV28BH7EE
B
1CO PYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
Apr. 2002
AV28BH7ENS / AV28BH7ENB
AV28BH7EPS / AV28BH7EPB
AV28BH7EES / AV28BH7EEB
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 4
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････
･･ ･･･ ･
･･ ･ 5
!MAIN DIFFERENCE LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････
･･････････････････････････
･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････
････････････････････････････････････････････
･･････････････････････ 9
!PARTS LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････
･･
･21
★OPERATING INSTRUCTIONS
★ST ANDARD CIRCUIT DIAGRAM ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････
････････････････････････････････
････････････････ 2- 1
SERVICE MANUAL
COLOUR TELEVISION

No.51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
2
SPECIFICATIONS
Content
Item AV28BH7ENS
AV28BH7ENB
AV28BH7EPS
AV28BH7EPB
AV28BH7EES
AV28BH7EEB
Dimensions (W x H x D) 77cm × 58cm × 48cm
Mass 33.2 kg
TV RF System B/G B/G , L /L’ B/G , D/K, K1
TV Mode PA L PA L / SECA M PA L / SECA M
Co lou r Sy st em Video Mode PA L / NTSC 3 .58 /
NTSC 4.43
PA L / SE CAM / N TSC 3 .58 /
NTSC 4.43
PA L / SE CAM / NTSC 3 .58 /
NTSC 4.43
Teletext System FLOF(Fast ext) / TOP
St ere o Sy st em A2 / NICAM
Tuning System Fr equ enc y Synt hes iz er Tun in g S ystem
Nu mb er of CH Memory Position 20 0 ch
VHF (VL) 46.25MHz ~ 168.25MHz
VHF (VH) 17 5.2 5M Hz ~ 46 3.2 5MH z
UHF 47 1.2 5MH z ~ 86 3.2 5M Hz
Receiving Frequency
CATV S1 -S 20 & S 21- S4 1
& S75-S79
B/ G : S 01- S4 1 / S7 5-S7 9
L : S 01- S4 1 / S7 5- S7 7
B/ G : S 01- S4 1 / S7 5- S7 9
D/ K : S 01- S4 1
VIF Carrier 38 .9 MHz
32.4MHz (6.5MHz)
32.9MHz (6.0MHz)
Intermediate Frequency SIF Carrier
33.4MHz (5.5MHz)
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Aerial Input Terminal 75 Oh m Un b al anc ed
Power Input AC 2 20V ~ 24 0V, 50H z
Power Consumption 17 5W ( Ma x. ) / 1 30W ( Avg .)
Picture Tube 28 inch m ea sur ed di a gon all y
Hi g h Vo lt ag e 29 .5kV ( in cu t- off ser vice mo de)
Spe ake r 57 ×160 mm ellipse type ×2 + Tweeter ×2
Au dio Output 12W + 12 W
Vide o 1V(p-p), 75 Ohm
Input Au dio
(
L/R
)
50 0m V(r ms ), Hi gh Impe da nce
Vide o 1V(p-p), 75 Ohm
Output Au dio
(
L/R
)
50 0m V(r ms ), L ow Imp ed anc e
EXT 1 (Video/Audio/RGB)
Rear Side EXT 2 ( Vide o/A ud io /S- VHS)Input Terminal
Front Side F AV ( Vid eo/A ud io)
Front Side Hea dph on e j ac k (S tere o m ini jack, 3.5 mm∅)
EXT 1 ( Vid eo/ Aud i o)Output Ter minal Rear Side
EXT 2 ( Vid eo/ Aud i o) ( Se lecte d TV, AV 1 o r AV3)
Remote Control Unit VE-3 00157 81 (RM-C85), Battery size:AAA/R03 x 2
Design & speci fications ar e subje ct to cha nge wi thou t notice.

No.51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
3
■
■■
■21-pin Euro connector (SCART socket) : EXT 1 / EXT 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 EXT 1 EXT 2
1 AU DIO R o ut put 50 0m Vrms(N omi na l) ,L ow i mpe dan ce ○
(TV OUT)
○
(TV/LINE OUT)
2 AUDIO R input 500mVrms(Nominal),High impedance ○○
3 AU DIO L o utp ut 50 0m Vrms(N omi na l) ,L ow i mpe dan ce ○
(TV OUT)
○
(TV/LINE OUT)
4 AUDIO G ND ○○
5 GND (B) ○○
6 AUDIO L input 500mVrms(Nominal), High impedance ○○
7Binput 70 0mVB-W, 75Ω○ NC
8FUNCTON SW
(SLOW SW) Low : 0-3V, High : 8-12V, High impedance ○NC
9 GND (G) ○○
10 - NC -
11 G in put 70 0m VB-W, 7 5Ω○ NC
12 -NC -
13 GND (R) ○○
14 GND (YS) ○NC
15 R / C input R : 700mVB-W, 7 5Ω
C : 300mVP-P , 75Ω
○
(R/C)
○
(only C)
16 Ys in put L ow : 0 – 0. 4, H ig h : 1 - 3 V, 75 Ω○NC
17 GND(VIDEO output) ○○
18 GND(VIDEO input) ○○
19 VIDEO ou tpu t 1V S-W (Negative going sync), 75Ω○
(TV)
○
(TV/LINE OUT)
20 VIDEO / Y input 1VS-W (Negative going sync), 75Ω○○
21 COMMON G ND ○○
[Pin assignment]

No.51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
4
SAFETY PRECAUTIONS
1. The d esign of th is pr od uct con ta in s sp ecial har d wa re , ma ny
circuits and components specially for safety purposes. For
con ti nu ed pr ot ection , n o chan g es sh ou ld b e ma de to the o ri g inal
d esign un l ess a uth or ized i n writin g by th e ma nu fact ur er .
Rep l acemen t p ar ts m ust b e i d ent ic al to thos e u sed i n th e or igin al
circu 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 ation s of t he desi g 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 warra nt y and wi ll f ur th er r eli eve t he ma nu factu r er
of r esp onsi b il ity for perso na l inj ury or p r op erty d am ag e r esult in g
th er efr om .
3. M an y e l ectr ical an d m ech ani ca l p ar ts i n th e pr od ucts ha ve
special safety-relat ed characteristics. T hese charact eristics are
oft en no t e vi den t f r om visua l insp ecti on n or ca n t he pr o tect io n
aff or de d by th em nece ssar ily 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 l tag e, watt ag e, etc. Rep lacem en t
p arts wh ic h ha ve th ese sp ecial 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 ar e identified by shading
on the sche matics and by (!
!!
!) on the parts list in Service
manual. T he us e of a sub sti tu te r ep la cem en t w hich do es n ot
h ave th e sam e saf ety ch ar act er ist ics as t he r eco mm en de d
r eplac em ent par t sh own i n th e p ar ts li st of S er vi ce m an ual may
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 the GN D i s sh own b y th e LI VE side G ND , th e
ISO LATE D(N EUTRAL) sid e GND a nd EA RTH side GND. Don' t
sh ort b etwee n the L IVE si de GND a nd IS OLATE D( NEU TRAL)
side GND or EA RTH side GND and ne ver meas ure with a
m easu r in g app aratu s ( osc il losc ope et c.) th e LIV E si d e GND an d
ISOLATED(NEUTRAL) side GND or EARTH side GND at the
same 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 adju ste d ( Se e
ADJUSTMENT OF B 1 POW E R SUPPL Y).
6. The hi gh volta ge app lie d t o th e pictu re tu be mu st con for m wi t h
th at sp eci fied i n S er vice m an ual. E xcessive h igh vo lt ag e ca n
cau se an i ncre ase i n X- Ray em ission , 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, remove t he AC power
imm ed iate l y an d de ter m ine th e ca use b y vi sua l i nsp ect io n
( in cor rect in stall at ion, cr acke d or m elte d hi gh vo lt age har n ess,
p oor so ld er ing, et c.). T o m aint ai n the p r ope r min im u m l e vel of
sof t X-R ay em issi on, c omp on en ts in th e hi gh voltag e ci rcui tr y
incl ud ing t he pi ct ur e tu be must b e t he e xact r ep lacem e nts or
alte rn at ives ap pr ove 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 hi g h v oltag e pr ob e wi t h a V TVM. D ischa rg e th e
picture tube before attempting meter connection, by connecting
a cl ip le ad to th e gr ou nd f ra me a nd c onn ectin g th e oth er end of
the lead through a 10kΩ2W resisto r to the an od e b utt on .
8. W hen se r vice is requ ire 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 ive n t o assur e cor rect l ea d dr ess in th e
hig h vol tag e cir cuit a r ea. W her e a s hor t ci rcuit h as occu rr e d,
th ose co mp on ent s tha t indi ca te evide nce of ove r hea ti ng sho uld
b e r e place d. A lwa ys u se th e ma nuf act ur er's rep l acemen t
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
Af ter r e-ass emb lin g th e p r odu ct, alw ays 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 dio i npu t and ou tpu t t er min al s, C on tr ol kn obs,
metal cabinet, screwheads, earphone jack , control shafts, etc.)
to be su re th e p r odu ct i s 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 iso lation be tween the A C prima ry ci rcu it an d all me tal p ar ts
exp ose d t o th e us er , p ar ti cular ly 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 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 servic e trad e.
(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 tl et ( d o n ot use a li n e
isol atio n transf or mer du r in g this ch eck.) . U sin g a " Lea kag e
Cur r ent T este r" , me asur e th e lea kag e cu rre nt f rom each exp osed
m etal p ar t of the ca bine t, p art icu l arl y any e xpos ed me tal p ar t
h aving a re tur n pa th to t he ch assis , t o a kn own go od ea rt h
gr ou nd (wa ter pip e, e tc.) . An y leaka ge cur r en t m ust n ot e xceed
0.5mA AC (r.m.s.).
How eve 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 rnat e Che ck M ethod
Pl ug th e A C lin e c ord d irect l y in to th e A C ou tl et ( d o n ot use a li n e
isol atio n tran sform er dur ing t hi s che ck.) . Use an AC vo lt me ter
h aving 1 00 0 oh ms pe r vol t or m ore sens it i vity in th e fo llow ing
m ann er. C on nec t a 1 50 0Ω10W res ist or par a 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 ar th gr o un d ( wa ter pi pe , etc.) . M eas 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 tion to e ach exp ose d me tal par t, p art icul arl y a ny exp osed
m etal p ar t havi n g a retu rn pat h to t he ch assis, an d measu r e th e
AC voltag e ac ro ss the r es ist or . No w , re ver se 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 volt ag e me asu re d
mu st not exc eed 0 .75V AC (r.m. s.). This c orresponds to 0 .5mA
AC (r.m.s.).
However, in tropical area, this must not exce ed 0.3V AC ( r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15μF A C-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 SENSIT IVITY)

No.51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
5
FEATURES
1. It is a remote controlled color television.
2. 20 0 pr og r ams fr om VHF , UHF b an ds or cab l e ch ann el s can be
pres et.
3. It c an tun e c abl e cha nn el s.
4. Cont ro lli n g th e T V i s ver y easy by i ts m en u dr ive n s yst em .
5. It h as t wo Euro con nect or socke ts f or extern al d evic e ( such as
vide o r eco rd er , vi d eo ga mes , a udi o set, e tc.)
6. Fr ont AV Inp ut avai la ble.
7. St er eo s ou nd s ys tems ( A2 + N ICAM) ar e ava ila ble.
8. Full fu nctio n Tele text (Fa ste xt , TOP ).
9. It i s 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 amm ing Syste m).
12 . Al l pr og r ams ca n b e nam ed .
13 . For war d o r bac kward au to ma tic tu ning .
14 . Au tomat ic sou nd mu te wh en no tr an smission .
15 . 5 minu tes aft er the br o adc asti ng ( closed own) , the T V s witch es
itself aut om ati ca ll y t o st and - by m od e.
MAIN DIFFERENCE LIST
MODEL No.
Parts Name
AV28BH7ENS
(Silver)
AV28BH7ENB
( Bl ack )
AV 28 B H7 EP S
(Silver)
AV 28 B H7 EP B
( Bl ack )
AV 28 B H7 EE S
(Silver)
AV 28 B H7 EE B
( Bl ack )
MA IN PW B VE -2 00 845 80 VE -2 00 845 99 VE -2 00 845 94
IN ST B OOK VE -5 00 233 25 VE -5 00 233 29 VE -5 00 233 32
FR ONT CA BINET VE -2 00 863 94 VE -2 00 863 95 VE -2 00 863 94 VE -2 00 863 95 VE -2 00 863 94 VE -2 00 863 95
FR ONT AV DOO R VE -2 00 692 19 VE -2 00 863 14 VE -2 00 692 19 VE -2 00 863 14 VE -2 00 692 19 VE -2 00 863 14
BA CK CO VE R VE -2 00 846 16 VE -2 00 690 18 VE -2 00 846 16 VE -2 00 690 18 VE -2 00 846 16 VE -2 00 690 18
BA CK DO OR VE -2 00 875 23 VE -2 00 406 84 VE -2 00 875 23 VE -2 00 406 84 VE -2 00 875 23 VE -2 00 406 84
BU TTON ON/O FF VE -2 00 834 91 VE -2 00 690 16 VE -2 00 834 91 VE -2 00 690 16 VE -2 00 834 91 VE -2 00 690 16
BU TTON A SS’Y VE -2 00 834 90 VE -2 00 814 84 VE -2 00 834 90 VE -2 00 814 84 VE -2 00 834 90 VE -2 00 814 84
BA SE VE -2 00 785 82 VE -2 00 815 78 VE -2 00 785 82 VE -2 00 815 78 VE -2 00 785 82 VE -2 00 815 78
SH AS SIS FRA ME VE -2 00 040 05 VE -2 00 405 75 VE -2 00 040 05 VE -2 00 405 75 VE -2 00 040 05 VE -2 00 405 75
LO GO JV C VE -4 00 091 54 VE -4 00 091 52 VE -4 00 091 54 VE -4 00 091 52 VE -4 00 091 54 VE -4 00 091 52

No.51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. R emove th e 8screws marked A.
2. R emove th e 4screws marked B.
3. W i thdr a w t he r ear co ver to wa rd you .
REMOVING THE MAIN PWB
"After removing the rear cover .
1. D raw out b ack a nd re mo ve the M AIN PW B ASS ’Y,
NOTES
Be caref ul en ou gh whe n d eve lo pin g a mai n c hassis.
The wire of a POWER TRANSFER does not separateand short-circuit with other parts.
REMOVING THE FRONT AV + HEADPHONE JACK PWB
"After removing the rear cover.
1. Rem ove th e 2screws marked C, and remove the FRONT AV + HEADPHONE JACK PW B.
REMOVING THE FRONT CONTROL PWB
"After removing the rear cover.
1. Rem ove th e M AIN PW B AS S’Y.
2. Rem ove th e 5screws marked D, and remove th e FRONT CONTROL PW B.
REMOVING THE SPEAKER
"After removing the rear cover.
1. Rem ove th e 4screws marked E, and remove the SP EAK ER.
2. Rem ove th e 2screws marked F, and rem ove th e TW EETE R SPEA KER.
3. Rem ove an op pos it e sid e si mila rly.

No.51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
7
REAR COVER
SP EAKE R
MAIN PWB
FRONT CABINET
FRONT AV +
HEADPHONE JACK
PWB
FRONT
C ONT RO L
PWB
B(×4)
SP EAKE R
(TWEETER)
A(× 8)
E
(× 4)
E
(×4)
F
(× 2)
F
(×2)
C(×2)
D
(×5)

No.51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
8
SETTING OF THE LAST MEMORY FOR SHIPMENT
■
■■
■USER SETTING VALUES
Setting Item Setting Value Setting Item Setting Value
SOUND MENU FEATURE MENU
BA SS CENTER SL EEP TIME R OFF
TREBLE ↑CHILD LOCK OFF
BALANCE ↑EXT-2 OUTPUT TV
EFFECT OFF
PICTURE MENU INSTALL TV CONFIG. MENU
BRIGHTNES S LA NG UA GE ENGL ISH
COLOUR COUNTRY Other
CONTRAST
SHARPNES S
HUE (only NTSC)
Thes e ad j ust a re aut om atica lly
r estor e d wh en A PS bi t in S er vic e
menu is set .
The pr oc edu r e f or se tting AP S
bit is described bellow.
PICTURE MODE AUTO
■SETTING APS “ON” IN SERVICE MENU
1) En ter ser vice me nu in TV m ode b y pr essi ng “ IN FO” a nd “ MUTE ” ke ys simu lt an eou sly. Se rvi ce M en u w ill app ea r.
2) Select VIDEO by pressing “GREEN” key on remote controller.
3) C ho ose A PS i tem b y pr essi n g U p/ D own k eys on r em ot e co ntrol ler.
4) C ha nge th e va l ue to “ON” b y pr essin g L eft /Right keys o n re mo te con trol ler.
5) St or e th e chan ge b y pr essing “INFO" b utt on.
6) Exi t s er vi ce m ode b y pr essin g “ STA NDAR D” ke y on rem ote co ntr ol.

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
9
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You ca n ma ke t he n e ce ssa ry adjust me nts f or t his unit with
either the Remote Control Unit or With the adjustment tools
and par ts as given below.
2. Adjustment 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 ower i s tu rned o n c orrec tly.
4. T urn on th e pow er for s et an d test eq ui p me nt bef or e use , and
sta rt t he ad justm en t p r oced ures aft er waiting at least 30 min ut es.
5. U nless o the r wi se s pec if i ed, pr ep are t he mo st su it ab le r ecep tion
or inp ut si gn al for adjust m ent.
6. N ever tou ch any ad justm en t p ar ts wh ic h are n ot sp ecified i n t he
list for this adjustment - variable resistors, transformers,
condensers, etc.
7. Pres etti ng b efore ad justm en t.
Unl ess ot her wi se spec if ied in t he a djustme nt i nstr uct ions, p r ese t
th e f ol lo w in g f un ctions with th e r e mo te c ont ro l un it :
VIDEO STATUS STA ND ARD
TINT / COLOUR
PICTURE / BRIGHT
DETAIL
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) ［PAL/SECAM/NTSC
］
3. Remote control unit
MAIN PARTS LOCATIONS
IC304
ME MO R Y IC
TUNER
FBT
UPPER : FOCUS VR
LOWE R : SCREEN VR
B1
( Ind ic ated [1 50 /11 5V ]
on th e b ott om si de)
V
O
L
（＋）
（＋）（＋）
（＋） （－）
（－）（－）
（－）
PROG
/Ch.
（＋）
（＋）（＋）
（＋） （－）
（－）（－）
（－）
ME NU
LE D REMOCON
RECEIVER
FRONT
TOP
FRONT
AUDIO
VIDEO RL
HEADPHONE J ACK
IC900
MI CO M
FRONT CONTROL PWB
FRONT AV +
HEADPHONE JACK PWB
MAINPWB

No. 51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
10
BASIC OPERATION SERVICE MENU
■
■■
■HOW TO ENT ER THE SERVICE MODE
1) Press the INFORM ATI ON key and MUTING key of
REMOTE CONTROL UNIT simultaneously, and the
SERVICE MENU screen of Fig.1 will be displayed.
2) W hil e th e F ig .1 i s d i spl aye d, press t he BL UE key for
acce ss to the SERV ICE MENU (2/ 2) (Fig.2).
■HOW TO EXIT SERVICE MODE
1) Press the MENUKey on REMOTE CONTROL UNIT.
REMOTE CONTROL UNIT key NAME
MUTING key
UP / DOW N
( / ) key
INFORMATION
key
COLOR k ey
LEFT / RIGHT
(
/
)
ke
y
BLUE key
YE LLOW key
RED key
GREEN k ey
AK41
G03 5
18 . 12 . 20 01
SERV ICE
PRODUCTION
i
>
STORE
MENU
>
EXIT
H/V
V-SHIFT 00 0
V-SIZE 0038
H-SH IF T 12 24
H-SIZE 02 3
S-COR 027
LI NR T -07
ANGLE 00 3
BOW 002
TR APEZ -07
PAR AB -39
U. CO R -01
L. COR 00 2
TILT 000
TR P ZD 01 8
VIDEO
WdR 079
WdG 064
WdB 067
Cu R 06 4
Cu B 06 4
Cu G 06 4
YDP -04
AGC 04 5
APSW 2
APS ON
T_ T TH O
T_ P SAM
YDS -06
YDN -01
DVD O FF
C. M O FF
BL UE ON
SERVICE MENU
(
1/2
)
Fig.1
PRODUCTION i>STORE MENU>E XIT
OPTIONS
0.HPHONE OFF
1.CR T 4:3
2.S-VHS OFF
3.f(IF) 38.9
4.Tu rk ON
5.VGA O FF
6.F RON T ON
7.DPL OFF
8.VD OFF
9.NSL ON
SERVICE MENU (2/2)
ADJU STMENTS
PIP C NTRST 00 0
PIP YDelay 000
PIP Fram e 0
EHTHP 00 1
EHTH TC 00 0
EHTH -36
EHTV -14
EHTV TC 00 5
SVD EL 000
BCLTH RES T1
O SD CONT 08 0
OSD BRI 035
TE XT BRI 03 0
INIT NVM
Presc aler
FM 015
NI CAM 03 5
I2S 016
SCA RT 02 5
SYSTEM
0.PAL B/G ON
1.PAL D/K OFF
2.PAL I OFF
3.SECA M B/G ON
4.SECA M B/G OFF
5.SECA M B/G ON
6.AUST. OFF
Fi
g
.2

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
11
OPTIONS
0.HPHONE OFF
1.CR T 4:3
2.S-VHS OFF
3.f(IF) 38.9
4.Tu rk ON
5.VGA O FF
6.F RON T ON
7.DPL OFF
8.VD OFF
9.NSL ON
■
■■
■SELECTION OF ADJUSTMENT ITEMS
1) Press the COLOR key and select t he service menu s ection.
2) Se le ct t he ADJUS T It em, us e UP ( ) / DOWN( )
key of r em ot e c ontro l un it.
3) To ch an ge th e se l ected p ar am et er , us e LEFT ( )
an d RIGHT ( ) key.
4) Press the INFORM ATI ON key to STORE.
■HOW TO EXIT SERVICE MODE
1) Press the MENUKey on REMOTE CONTROL UNIT.
AK41
G03 5
18 . 12 . 20 01
SERV ICE
PRODUCTION
i
>
STORE
MENU
>
EXIT
H/V
V-SHIFT 00 0
V-SIZE 0038
H-SH IF T 12 24
H-SIZE 02 3
S-COR 027
LI NR T -07
ANGLE 00 3
BOW 002
TR APEZ -07
PAR AB -39
U. CO R -01
L. COR 00 2
TILT 000
TR P ZD 01 8
VIDEO
WdR 079
WdG 064
WdB 067
Cu R 06 4
Cu B 06 4
Cu G 06 4
YDP -04
AGC 04 5
APSW 2
APS ON
T_ T TH O
T_ P SAM
YDS -06
YDN -01
DVD O FF
C. M O FF
BL UE ON
SERVICE MENU
(
1/2
)
RED key
select H/V
GREEN key
select VIDEO
BL UE key
access SERVICE
(SERVICE MENU 2/2)
PRODUCTION i>STORE MENU>E XIT
SERVICE MENU
(
2/2
)
ADJU STMENTS
PIP C NTRST 00 0
PIP YDelay 000
PIP Fram e 0
EHTHP 00 1
EHTH TC 00 0
EHTH -36
EHTV -14
EHTV TC 00 5
SVD EL 000
BCLTH RES T1
O SD CONT 08 0
OSD BRI 035
TE XT BRI 03 0
INIT NVM
Presc aler
FM 015
NI CAM 03 5
I2S 016
SCA RT 02 5
SYSTEM
0.PAL B/G ON
1.PAL D/K OFF
2.PAL I OFF
3.SECA M B/G ON
4.SECA M B/G OFF
5.SECA M B/G ON
6.AUST. OFF
RED key
select ADJUSTMENTS
GREEN key
select Prescaler
BL UE key
select O PTIONS
YE LLO W key
select S YSTE M
Do No t Adjust

No. 51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
12
■ADJUSTMENT SERVICE MENU & INIT IAL SETTING VALUE
ADJUSTMENT ITEM DE SCRIPTI ON INITIAL VALUE
V-SHIFT VERTICAL SHIFT CORRECTION 000
V-SIZE VERTICAL SIZE CORRECTION 0038
H-S HI FT HORIZONTAL S HIFT CORRE CTI ON 1224
H-SIZE HORIZONTAL SHIFT CORRECTION 023
S- C OR S- C OR RE CT I O N 02 7
LINRT LINEARITY CORRECTION -07
H/ V ANGLE ANGLE CORRECTION 003
BOW BOW CO RR EC T IO N 00 2
TRAPEZ TRAPEZIUM CORRECTION -07
PARAB PARABOLA CORRECTION -39
U.COR UPPER PART CORRECTION -01
L.C OR LOW E R CO RR EC T IO N 00 2
TILT TILT CORRECTION 000
TRPZD TRAPE ZO ID CO RRECTIO N 018
W dR W hite Bal a nce A dj u stm ent 07 9
W dG W hite Bal a nce A dj u stm ent 06 4
W dB W hite Bal a nce A dj u stm ent 06 7
CuR Col ou r Cu t –off L evels 06 4
CuB Col ou r Cu t –off L evels 06 4
CuG C olou r C u t –off L evel s 06 4
YD P Y- de lay P AL - 04
AGC Au tomat ic Gain Cont ro l 04 5
VI DE O AP SW AP S W ait Tim e 2
AP S Au tom at ic Progr a m S or t ON
T_T Set the main tuner t ype THO
T_P Set the PIP tuner SAM
YD S Y- de lay S EC AM - 06
YDN Y-delay NTSC -01
DVD If the TV set has DVD player, this option is set ON. OFF
C.M This op tion t ogg les th e Carrier Mute fun ction. If set O N, the
sound is muted if the sound carrier is shifter over 1MHz. OFF
BLUE
If this option is set ON, the screen is cove red with blue
background when there is no video signal and between
ch ann el ch ang es.
ON

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
13
■
■■
■ADJUSTMENT SERVICE MENU & INITIAL SETTING VALUE (Do not Adjust)
ADJUSTMENT
GROUP ADJ USTMENT ITEM DESCRIPTI ON INITIAL VALUE
PIP C NT RST Ad ju st t he c ont r ast of th e p icture insi d e th e P IP win dow. 00 0
PIP Y Delay Ad ju st t he l umin an ce de lay ( wit h res pec t to c olour ) of t he pictu re
insi d e th e PI P wind ow. 00 0
PIP Frame Deci des t he c ol our an d sh ape of th e bo ar de r ar ou nd th e PIP
wi n d ow. 0
EH THP EH T co mp ens ation co eff icien t f or ho rizo nta l ph ase. 00 1
EH TH TC EH T tim e c onst ant for h or izon tal p ha se co mp en satio n. 00 0
EH TH EH T co mp ens ation coef ficien t for h or izon tal am pli tu de (±10 0%) . -36
ADJUST EH TV EH T co mp ens ation co effi ci en t f or ver tical a mp lit ud e ( ±25 %). - 14
MENTS EHTV T C Time constant for control of vertical and horizontal amplitude
EH T co mp ens ation . 00 5
SV DE L Delay of S VM OUT in st eps of 1 2. 5 ns.
(7=SVMOUT vs. RGBOUT is 60ns) 00 0
BCL T HRES Be am cur ren t l imi t t hr esh old ad ju stm ent .
(select T1 f or 28 inch 4:3 tube ) T1
OSD CONT This ite m is used to set the OSD and Teletext Contrast. 080
OSD B RI This ite m is u sed to set th e OS D Brig ht ness. 03 5
TEXT BRI Thi s i te m is u sed to set th e T ele text Bri gh tness . 03 0
INIT NVM Sele ct t o initialize th e EE PROM to th e f acto ry d ef au lts.
FM Defin es th e FM ste reo presc al e va lu e f or so und o utp ut po we r. 01 5
Prescaler NICAM Defin es th e N IC AM ste r eo pr esc ale val u e f or sou nd out put
power. 03 5
I2S Defin es th e I 2S pr esc ale va lu e. 01 6
SC ART Defin es th e SC ART so un d o utp ut presc ale va lu e. 02 5
0.H PHONE Sw itche d hea dp ho ne OF F
1.C RT T his i te m is u sed to select th e t ub e. I t can b e s et t o 4: 3 o r 16: 9. 4:3
2.S-V HS If the TV se t h as a n S -V HS int erf ace th is it em is set ON. OFF
3.f (I F) Thi s va lu e sh ou l d b e 3 8. 9 ( con tr ast) 38 .9
OPTI ONS 4.T u rk Tur kis h m en u la ng ua ge is visib le w he n s et ON. ON
5.V GA Thi s i te m s hou ld a l wa ys b e OFF. OF F
6.FRONT If the TV set has a Front AV interf ace this item is s et ON. ON
7.D P L If the TV set has a Dolby ProLogic sound system,
this it em is set O N. OFF
8.V D If the T V se t h as a Vir tua l D olby s oun d s yst em ,
this it em is set O N. OFF
9.N S L W hen set ON , sh ar pn ess r a nge on th e p icture is increas ed. ON
0.P AL B /G D efi n es wh eth er PAL BG sta nd is ava il a ble or no t. ON
OFF (ENS,ENB)
1.P AL D / K OFF (EPS,EPB)Defin es wh eth er PAL D K st an dar d is ava ila ble or no t.
ON (EES,EE B)
2.P AL I D efi n es wh eth er PAL I stan da rd is ava il able or n ot. OFF
SY STEM 3.S EC AM B/G Defin es wh eth er SECA M B G st and ar d is availab l e o r no t. ON
4.SECAM D/K Defines whether SECAM DK standard is available or not. OFF
OFF (ENS,ENB)
5.S ECAM L/ L’ ON (EPS,EP B)Defin es wh eth er SECA M L L ’ st and ar d i s avai lab le o r not .
OFF (EES,EEB)
6.A US T . W hen set ON, A ustral ia c ha nne l ta ble b eco m es a va il able. OFF

No. 51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
14
ADJUSTMENTS
■
■■
■DEFLECTION CIR CUIT
Item Measuring
instrument Test point Ad justment part Description
AGC
adjustme nt
Signal
gener ator
Remote
control unit
AG C 1. Receive a PAL BG sign al at 6 0dB μV R F si gn al leve l.
2. Sele ct AGC with th e UP/DOWN ( / ) key.
3. Adju st AGC by pressin g with the LEFT/RIGHT ( / ) key till
volta ge at pi n9 of PL 20 2 i s e qu al to 3. 0V
4. Press the ME NU key a nd m emor iz e th e s et va lue.
V-SHIFT
adjustme nt
Signal
gener ator
Remote
control unit
V- S HI FT 1. R ecei ve a cir cl e p att ern si g na l of ve rt ic al freq ue ncy 5 0Hz.
2. Sele ct V-SHIFT with the UP/DOWN ( / ) key.
3. Ad ju st V-S HI FT with th e L EFT/RIGHT ( / ) key t o ma ke
A = B.
4. C heck an d r ea djust V- SH IFT i te m if th e a dj ust me nt beco mes
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
V-SIZ E
adjustme nt
Signal
gener ator
Remote
control unit
V-SIZE 1. Receive a cross-h atch signa l.
2. Se le ct V-SI ZE with t he UP/DOWN ( / ) key.
3. Ad ju st V-SI ZE with t he LE FT/RIGHT ( / ) key u ntil
h orizo nt al blac k l ines o n b ot h t he u pp er a nd low er part of th e
cr oss- hat ch p att er n b eco me very close to th e u pp er an d l ower
h orizo nt al sid es of p i ctur e si ze a nd ne ar ly ab out to di sa ppe ar .
4. C heck an d r ea djust V- SI ZE i tem i f the ad j ustm en t b eco mes
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
Picture
size
10 0%
Screen
size
very close
very close
A
B

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
15
Item Measurin
g
instruments Test point Ad justment part Description
H- S HI FT
adjustme nt
Signal
gener ator
Remote
control unit
H- SH IF T 1. R ecei ve a c ircl e p at ter n s ig na l.
2. Select H-SHIFT with the UP/DOWN ( / ) key.
3. Ad ju st H-SHIFT wit h t he LE FT/RIGHT ( / ) key to ma ke
C= D.
4. C heck a nd r e adjus t H -S HIFT i te m if th e ad justme nt
b ecom es imp rope r afte r s om e ot her g eom et ric a djustm en ts
ar e do ne.
5. Press the INFORMATION key and memorize the set value.
H-SIZE
adjustme nt
Signal
gener ator
Remote
control unit
H- S IZ E 1. R eceive a cr oss-h atch signa l.
2. Sele ct H-S IZE with the UP/DOWN ( / ) key.
3. Ad ju st H-SI ZE w ith t he LE FT /RIGH T ( / ) key ti ll vertical
lines on both the left and right part of the cross-hatch will be
vis ible nor screen will be so wide.
4. C heck an d r ea djust H -S IZ E it em if th e a dj ust me nt b ec om es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
CD
Screen size
Picture size 100%
very
close
very
close

No. 51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
16
Item Measurin
g
instruments Test point Ad justment part Description
V.
S-CORRE CT.
& LINEARITY
adjustme nt
Signal
gener ator
Remote
control unit
S-COR
LINRT
1. R eceive a cr oss-h atch signa l.
2. Select S-COR with the UP/DOWN ( / ) key.
3. Adjust S-COR with the LEFT/RIGHT ( / ) key till the size
of sq uar e s on b ot h th e up pe r an d lo we r part of cr oss-hat ch
p atter n beco me equ al to th e squ ar e l aying on th e ver ti cal
center of the cross-hatch pattern.
4. C heck an d r ea djust S- COR item i f the ad justmen t
b ecom es im prop er af te r s om e o the r ge ometri c
adjustments are done.
5. Press the INFORMATION key and memorize the set value
6. Select LINRT with the UP/DOWN ( / ) key.
7. Ad ju st L INRT with t he LE FT/ RIGHT ( / ) key till a ll the
size of squ ar es of the cro ss-h atch pa tte rn bec om e i n equ al
size f rom th e top of t he scree n t o it s b ott om of t he wh ole
screen.
8. C heck and r ead ju st LI NR T i t em if t he adj u stme nt bec om es
imp r ope r af ter so me oth er g eom et ric ad justmen ts
( esp eci ally af ter th an S-CO R ad ju stm en t) ar e do ne.
9. Press the INFORMATION key and memorize the set value.
ANGLE
adjustme nt
Signal
gener ator
Remote
control unit
ANGLE 1. Receive a cross-h atch signa l.
2. Sele ct ANGLE with the UP/DOWN ( / ) key.
3. Adju st ANGLE with the LEFT/ RIGHT ( / ) key till the
vertical lines of the crosshatch patt ern become straight.
4. C heck an d read j ust ANGL E it em i f th e ad ju stm en t bec om es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
CENTER
UPPE R
LOW E R

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
17
Item Measurin
g
instruments Test point Ad justment part Description
BOW
adjus tme nt
Signal
gener ator
Remote
control unit
BOW 1. R eceive a cr oss-h atch signa l.
2. Se le ct BOW with th e UP/ DO W N ( / ) key.
3. Adju st BOW with the L EFT/RIGHT ( / ) key and the
vertical line straight.
4. C heck an d r ead ju st BOW ite m i f the ad j ust me nt bec om es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
TRAPEZIUM
adjus tme nt
Signal
gener ator
Remote
control unit
TRAPEZ 1. Recei ve a cr oss- h atch signa l.
2. Select TRAPEZwith the UP/DOWN ( / ) key.
3. Adjust TRAPEZ with the LEFT/RIGHT ( / ) keytill vertical
lin es, e spe cial ly lin es at the si des of t he pi cture fram e
b ecam e p ar a ll el to th e b oth si d es of pi ctur e tub e as c lo se as
possible.
4. C heck an d r ea djust TR PEZ i t em if th e a dj ust me nt b ec om es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
NOTE
In cas e wh er e th ere i s a b ow-s hap ed di stor tio n of
ima ges on th e scre en. (Fi gu re)
Paralle l

No. 51967
A
V28BH7ENS / AV28BH7ENB
A
V28BH7EPS / AV28BH7EPB
A
V28BH7EES / AV28BH7EEB
18
Item Measuring
instrument Test point Ad justment part Description
SI DE PI N
adjus tme nt
Signal
gener ator
Remote
control unit
PARAB 1. R ecei ve a cr oss- h atch signa l.
2. Select PARAB with the UP/DOWN ( / ) key.
3. Adju st PA RAB with the LEFT /RIGHT ( / ) key till vertic al
lines close to th e bo th sid es of the pictur e fram e b ecome
p ara ll e l to ve rt ic al si d es of picture t ub e wi th ou t any b end i ng
to left or to right side of t he screen.
4. C heck an d r ea djust PA RA B i t em if th e a djust m ent be com es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
CORNER
adjus tme nt
Signal
gener ator
Remote
control unit
U. C O R
L.COR
1. R eceive a cr oss-h atch signa l.
2. Select U.COR with the UP/DOWN ( / ) key.
3. Adjust U.COR with the LEFT/RIGHT ( / ) key till vertical
lin es at th e u pp er c or ners of the p ic tur e fr am e b ecom e
ver tical and pa ral lel to ver ti cal c orn er si d es of pi ctu r e tu b e.
4. C heck an d re ad ju st U .C OR it em i f the a djust me nt be com es
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
5. Press the INFORMATION key and memorize the set value.
6. Sele ct L.CO R with the UP/DOWN ( / ) key.
7. Adju st L.CO R with the LE FT /RIGHT ( / ) key till vertical
lin es at t he l ower cor n ers of t he p ict ur e fram e b ecom e
ver tical and pa ral lel to ver ti cal c orn er si d es of pi ctu r e tu b e.
8. C heck an d read j ust L.COR item if th e a dj ust me nt be comes
imp r ope r aft er som e oth er g eom et ric a djust m ents are d on e.
Paralle l
Straig ht Stra ight

No. 51967
A
V28BH7ENS / AV28BH7EN
B
A
V28BH7EPS / AV28BH7EP
B
A
V28BH7EES / AV28BH7EE
B
19
■
■■
■VID EO CIRCUIT
Item Measuring
instrument Test point Ad justment part Description
WHITE
BALANCE
adjustme nt
Signal
gener ator
Remote
control unit
WdR
WdG
WdB
1. R eceive a bla ck & wh it e sign al .
2. Se le ct W dR, W dG and W dB wi th t he UP /DOW N ( / ) key.
3. Ad ju st W dR, W dG and W dB with th e LE FT/ R IGH T ( / )
key .
4. Press the ME NU key a nd m emor iz e th e s et va lue.
COLOUR
CUTOFF
LEVE L
adjustme nt
Signal
gener ator
Remote
control unit
CuR
CuG
CuB
1. Receive a cross-h atch signa l.
2. Select CuR, CuG and CuB with the UP/DOWN ( / ) key.
3. Adjust CuR, CuG and CuB with the LEFT/RIGHT ( / ) key
an d s et th e values of th ese it ems as 64 (con stant).
4. Press the ME NU key a nd m emor iz e th e s et va lue.
PAL
Y DELAY
adjustme nt
Signal
gener ator
Remote
control unit
YDP 1. Receive a PAL COLOUR BAR.
2. Select YDP with the UP/DOWN ( / ) key.
3. Ad ju st YDP by p r essing wit h th e LE FT/RIGHT ( / ) key ti ll
th e c ol our tr ansie nts on th e colou r b ar p att er n b eco me s as
sh arp er an d possi b le as col ou rs b etwee n tran sient s d o n ot
mix with each other.
4. Press the ME NU key a nd m emor iz e th e s et va lue.
SE CAM
Y DELAY
adjustme nt
Signal
gener ator
Remote
control unit
YDS 1. Receive a SECAM COLOUR BAR test pattern.
2. Select YDS with the UP/DOWN ( / ) key.
3. Ad ju st YDS by p r essing wit h th e LE FT/RIGHT ( / ) key ti ll
th e colo ur tra nsi ent s on the co lour bar pat ter n bec om es as
sh arp er an d possi b le as co l ours b et ween tra nsi en ts do n ot
mix with each other.
4. Press the ME NU key a nd m emor iz e th e s et va lue.
5.
NT SC
Y DELAY
adjustme nt
Signal
gener ator
Remote
control unit
YDN 1. Receive a NTSC COLO UR B AR t est pat ter n from an exter n al
sourc e (e.g. EX T 1).
2. Select YDN with the UP/DOWN ( / ) key.
3. Adju st YDN b y p ressing with the LEFT/RIGHT ( / ) key till
th e colo ur tra nsi ent s on the co lour bar pat ter n bec om es as
sh arp er an d possi b le as co l ours b et ween tra nsi en ts do n ot
mix with each other.
4. Press the ME NU key a nd m emor iz e th e s et va lue.