Remote Contr ol UnitRM-C25 2 ( AA /R6/U M- 3 batt ery×2)
Video(V
Au di o(L, R
Variabl e Audio Output (R/L) More than 0~1550mVrms (+6dBs)
27 ” (6 8cm) Mea sured D iag on ally
29 kV±1kV (at zero b eam current)
2”×3 -1/ 2” (5×9cm) Oval type×2
1.2 W + 1.2 W
Y: 1Vp-p P ositive ( neg ative s ync p rovi ded , wh en terminat ed with 7 5Ω)
C: 0. 286V
1V p- p, 75Ω ( RCA pin jack)
50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack)
1V p- p, 75Ω ( RCA pin jac k)
1V p- p 7 5Ω(positive sync)
50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack)
1V p- p, 75Ω ( RCA pin jack)
50 0m Vr ms ( -4 dBs ), High I mp ed anc e (RCA pin j ack)
Low impedance (400Hz when modulated 100%) (RCA pin jack)
p-p
(bu rst si gnal, when t erm inate d with 75Ω)
De s ign & speci ficatio ns ar e su bje ct to cha ng e wi thout no t ice.
2
No.51940
A
3
A
3
SAFETY PRECAUTIONS
V-27D30
V-27D20
1. The desi gn of t his p ro du ct c ont ai ns spec i al h ar dw ar e, man y
ci rcu its and c o mp on ent s s peci al ly for saf ety pur p oses. For
continued protection, no changes should be made to the
origina l des ig n u nless a uth or i zed in wri ting by t he m an ufactu re r.
Rep lacem en t par ts m ust be id ent ic al to thos e u sed in th e
origina l cir cuit s . S ervic e sho ul d be per f orme d by qu ali fied
p ers onnel o nly.
2. Alte r ation s of the desig n or circu i tr y of the p r odu c ts s hould n ot
b e mad e. A ny de si gn al te rations o r additio ns wil l vo id th e
manufact urer's warranty and will further relieve the
manu fac t urer of resp ons ib i lit y f or pe rs ona l in ju r y or p r ope rt y
d am age r esult in g t heref rom .
3. M an y e l ectr ical an d mech anic al pa rt s in th e p r odu c ts h av e
sp ecial s af ety-r elat ed charact eris tics. Th ese charac teri stics are
oft en not e vid en t fr om visu al in spe cti on no r can the prote c ti on
aff orde d by th em neces s ar ily be obta in ed by using
replac ement comp on ent s ra ted for h ig her vo l tag e, wa ttage, etc.
Rep lacem en t pa rt s wh ic h have t hes e sp ec i al s afet y
ch aracter istics a re i d entifi e d in th e par ts l ist of S ervic e man ua l.
Electrical components having such featur es are identified
by shading on the schematics and by (!!!!) on the parts list
in S erv ice manual. Th e us e of a s u bs t itu te re pl ac emen t whi ch
does not have the same safety characteristics as the
reco mmen ded replac emen t pa rt sho wn i n the pa rts l ist of
Se rvi c e ma nual m ay c aus e sh ock , f ire, or o th er haz ards .
4. Use iso la t io n tr ansforme r when hot c hass is .
The chassis and any sub-chassis contained in some products
are c onnect ed to on e s ide of th e AC p ower li ne . An i sola ti on
tr ansf or m er of ad equ ate cap acity sh ould be i nsert ed bet we en
th e p rodu ct and t he AC p ower s u pp ly p oi nt while p er for mi ng
an y ser v ice on so me pr o ducts wh en th e H OT ch assis is
exp ose d.
5. Don't short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
So m e mod el 's p ow er circ uit i s part ly dif fer en t in t he GN D . T h e
diff erenc e of t he GND is sh own by th e LI VE : (") side GND,
th e ISO LAT ED(NEU TRAL) : (#) side GND an d EAR T H : ( $)
si de GND. D on 't sho rt be tw ee n t he LIVE s id e GN D a nd
ISO LATE D(N EU TRAL) side GND or EARTH si de GN D and
never measure with a measuring ap paratus (oscilloscope etc.)
th e LI VE side GND a nd ISO LATED ( N EUTRA L) si d e G ND or
EARTH sid e GND at th e s ame time.
If above note will not be kept, a fuse or any parts will be broken.
6. If any re pa ir h as b ee n mad e to th e c h as sis , i t is re commend ed
th at t he B1 se ttin g sh ould b e c hec ked or ad juste d (See
ADJUSTM EN T OF B 1 POWE R SUPPL Y) .
7. The hig h v olt age a pplied t o the pi ctu re tu be mu s t c o nfo rm with
that specified in Service manual. Excessive high voltage can
cau se an incr ease i n X-R a y emission , arcin g and pos sible
com po nent d am age, th eref or e op eratio n un der excess ive hi gh
vol ta ge c ondit i ons sh ould be ke pt to a m in i mu m, or sh ou ld be
preve nt ed. I f seve re arc in g oc cu rs, remove th e AC p ower
immediately and determine the cause by visual inspection
(incor r ec t i nsta ll a tion , crac ked o r m el te d high vol tag e har ness,
p oor s olde rin g, etc. ). T o ma in ta in the prop er mi ni m um le v el of
soft X-Ray emission, components in the high voltage circuitry
incl ud i ng the pi ctu r e tu be mu st be the ex a c t r ep lac em en ts or
alte rn at ives a ppr o v ed b y th e ma nuf actu r er of th e co mp l ete
prod uct.
8. Do n ot c hec k high volta ge by d r awin g a n arc . U s e a hi gh
vol ta ge mete r or a hi gh volt age p robe with a VTVM . Disc h ar ge
th e p ictu r e tu be bef or e a tte mp ting me ter c o nne cti on , b y
con nec ting a cl i p l ead to th e gr ou nd fr am e a nd c on n ecti ng t he
oth er e nd of t he lead th r oug h a 10k Ω 2W resi st or to t he ano de
bu tto n.
9. W hen s e rvice is r equ i r ed, ob ser ve th e orig inal l ea d dress .
Extra p r ecau ti on s h ou ld be given to ass u r e c or re ct l ea d dr es s
in the hi gh volta ge c ircu it area . W her e a sh ort circui t ha s
occu rr e d, th os e c ompon en ts th at i nd ic ate ev i den c e of
overheating should be replaced. Always use the
manu fac t urer 's r eplace ment comp on ents.
10 . Isolation Check
(Safety for Electrical Shock Hazard)
Af ter re-a ssem bl i ng th e pr od uc t , always pe rf orm an iso l ati on
ch eck on th e expo sed m eta l p ar ts of th e c abi n et ( ant en na
ter m i na ls, vide o/a ud io in pu t and out put ter mi n al s , C on trol
knobs, metal cabinet, screwheads, earphone jack, control
sh afts, etc.) to be s ur e th e pr o duct is saf e t o op er at e wi th out
d ang er of elec t rica l shoc k.
(1) Dielectric Strength Test
The is olat ion b etwe en the AC pr i ma r y circu it and all m eta l par ts
exp osed t o the us er, par t icu lar l y an y expo sed metal p art h aving
a re tur n pat h to the ch as sis sh ou ld w i ths t and a volta ge of
11 00V AC ( r .m .s.) f or a per i od of on e sec ond.
(. . . . Withs tand a volta ge of 1100V A C (r.m. s.) to an applian ce
rate d up to 1 20V , and 3 000V AC ( r .m. s.) t o an appl i anc e ra ted
200V or more, for a period of one second.)
Thi s m eth od of test re qu ires a t est eq uip me nt n ot g enerally
fou nd in t he servi c e t ra de.
(2) Leakage Current Check
Plug t he A C li ne c or d di r ect ly int o th e AC ou tl et ( do not us e a
line is olati on tra nsf ormer dur i ng this che ck.). U sing a " L eakage
Current Test er ", mea sur e t he lea kag e c ur r en t fr om each
exp ose d m eta l par t of th e ca bi ne t, p ar tic ul ar l y an y expo sed
metal part having a return p ath to t he ch assis , to a known good
ea rt h gr o und ( wa ter p ipe, etc.) . A ny l ea kag e c ur r en t must not
exce ed 0.5m A AC ( r .m. s.) .
Howev e r, in t ro pi cal a rea, this m us t not e xc eed 0 .2m A AC
(r.m.s.).
"""" Alte rn at e Che ck M et ho d
Plug t he A C li ne c or d di r ect ly int o th e AC ou tl et ( do not us e a
line isolation transformer during this check.). Use an AC
vol tm et er h aving 100 0 o hms per v ol t or m or e s en s i ti vit y in the
follo win g ma nne r. Con nec t a 150 0Ω 1 0W resis tor pa ralle l ed
by a 0.15μ F AC - typ e cap ac i tor b etwe en an ex p os e d m eta l
p art and a k no wn go od earth gr ou nd (wate r pip e, et c.).
Measu re th e A C vo l tag e acr os s th e r es i st or w it h t he AC
voltmeter. Move the res istor connection to each exposed m etal
part, particularly any exposed metal part having a return path to
th e c h assis , an d m easur e t he A C v olta ge acr os s th e r es isto r.
Now, reve rs e th e plu g i n t he A C out let a nd r ep eat e ac h
measu rem ent. An y volta ge measu red m ust not exce ed 0.7 5V
AC (r.m. s.) . This corresponds t o 0.5mA AC (r.m. s.).
Howev e r, in trop ic al ar ea, thi s must n ot excee d 0 .3V AC
(r.m.s.). This corr esp on ds t o 0 .2mA AC ( r.m.s.).
AC VOLT METER
(HAVING 1000 Ω/V,
GOOD
EARTH
GR OUND
11 . High voltage hold down circuit check.
Af ter r ep ai r of th e high vol t ag e h ol d down ci r cuit, th is ci rcu it
sh all be c hec ked to oper ate correctly.
See item "Ho w to check the high voltage hold downcir cuit".
This mark shows a fast
operating fuse, the
letters indicated below
show the rating.
0.15μF AC-T YPE
1500Ω 10W
OR MOR E SENSIT IVITY)
PLACE THIS PROBE
ON E A C H EX PO SE D
ME T AL PA RT
A V
No. 51940
3
A
V-27D303
A
V-27D203
FEATURES
New chas sis design enabl es use of a si ngl e boar d with si mp lif ied
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circuitry.
User s can m ak e fun t o c onnect th e Digital Video Disk pl ay er with
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the c omp onent vi deo signal i npu t terminal .
Provid ed w ith miniatu re tuner (TV/CATV ).
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Mult if unct ional remote con trol p erm i ts pictu re a dj ustm ent.
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Ad opti on of t he C HAN NEL GUARD fu ncti on prevents th e s pecific
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chan nels from being selected, unl ess th e “ ID nu mber” is k ey in.
2
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I
C bus control utilizes single chip ICs.
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Adopti on of the VID EO STATUS f unction .
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Adoption of the ON/OFF TIM ER fun cti on.
Built-in V-CHIP system.
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With 75ΩV/U in c ommon ( F-Type) AN T Terminal.
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SLEEP TIMER for setti ng in real t ime.
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Clos ed-caption b roa dcasts can be view ed.
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Bu ilt - in MT S sys tem.
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Built-in H YPER-SURROUND system.
Becau se bu ilt -in the BBE circ uit im pr oved the sound of
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conver sation
S-VID EO input terminal for taking best adv antag e of Super VHS .
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Variable Au di o outp ut te rminal.
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3 LINE Digital Comb f ilter Im proved pi c tu re q ual i ty.
The differenc e between AV -27D 303 S and AV- 27 D3 03/ R is i n th e PIC T U R E T UBE.
As t he res ul t of the diffe rence in pictu re tube, the MAIN PW B al s o dif fers.
In the sam e w ay, the d if ference betw een A V-27D 20 3/S and A V- 27D20 3/R i s in th e PICTUR E TU BE t oo.