JVC AV-48WP30/ME Service Manual

SERVICE MANUAL

REAR PROJECTION TELEVISION

AV-48WP30

BASIC CHASSIS

AV-48WP30

/ME

SB2

CONTENTS

!

SPECIFICATIONS

! SAFETY PRECAUT IONS ･･････････････
!

FEATURES

!

HOW TO IDENTIFY MODEL ････････････

! FUNCTIONS ･････････････････････････
! INSTALLATION ･･････････････････････

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･･････････････3

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････････････4

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･････････････････････････ 5

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･･････････････････････ 7

････････････････････････････････････････････

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

2

4

!

TECHN ICAL INF ORMATION

! MAIN PART S LOCATION ･････････････
! SPECIFIC SERVICE INSTRUCTIONS･･･
!

SERVICE ADJUSTMENTS････････････

! TROUBLESHOOTING ･･･････････････

★ STANDAR D CIRCUIT DIAGRAM ･･･････

! PARTS LIST ･･･････････････････････

･･･････････････････････ 53

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･･･････････

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･･････････････････････････

･･･ 10

･･････

････････････ 19

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･･･････････････ 51

･･････････････････････････････

･･･････ 2- 1

･･････････････

No.519 89
Apr. 2002

8

A

V-48WP30

SPECIFICATIONS

Items Content s

Dimensions (W

Mass 81.0 kg ( 179.0 Ibs)

TV RF System
Color Sy st em

Sound System

TV Receiving Channels and Frequency

CATV Receiving Channels and Frequency

TV/CATV Total Channel 180 Channels

An ten na Ter mi nal 75Ω(VHF/UHF) F-type co nnector

Intermediate Fr equency

Color Sub Carrier 3.58MHz

Power Input

Power Consumption

Scree n

Scree n Size

Projection Tube

Hi gh Vo l t ag e

Speake r

Audio Powe r Output

External Input

Au dio Output Fi x : 5 00mVr m s(-4 dBs) low im peda nce (1kH z when m od ulat ed 10 0%)

Digital-Input DVI-D signal link 19pin connector

Speaker Input 45 W 16Ω(maximum input)

AV Compulink ⅢⅢⅢⅢ φ3.5mm mini jack

Remote Control Unit RM-C 322G

××××H××××

D) 12 0.0 cm×12 4. 4cm×60 .9c m ( 47 -1/ 4×49×24 )

VL B a nd

VH B and

UHF Band

Low Band

High Band

Mid Band

Super Band

Hy p er Ban d

Ul tr a B and

Sub Mid Band

Vide o IF Car rier

Sound IF Carrier

CCIR (M)
NTSC

BTSC System (Multi Channel Sound)

(02～06) 54 MHz～88MHz
(07～13) 17 4M H z～ 21 6MH z
(14～69) 47 0M H z～ 80 6MH z

(02～06, A-8) by (02～06&0 1)
(07～13) by (07～13)
(A～1) b y ( 14 ～22)
(J～W) by (23～36)
(W +1～W+ 28) b y (3 7～64 )
(W +29～W + 84) b y (65～1 25)
(A8, A4～A1) by (01, 96～99 )

45 .75 MHz

41.25 MHz ( 4 .5MHz)

12 0V AC , 60H z

24 8W

Tr ansparen t s cree n ( un itized fres nel l e ns / doubl e l en ticular le ns)

48 (1 22cm) Meas ured diag on al l y, 1 6:9 r atio (W :106 .3cm, H :5 9.8cm )

17 cm (6.7 ) tube ×3 ( R / G / B )

31kV±1.0kV (at zero beam current)
φ13cm round×2, φ5. 5cm roun d ×2

10 W +1 0W

Vide o Input

Au dio Input

S-Vide o Y: 1Vp-p p ositive ( n egative s ync p r ovided, wh en term i nat ed wit h 75Ω)

Comp onent Input PB: ±0.3 5Vp- p

1V p- p, 75Ω (RCA pi n j ack×4)
50 0m Vr ms ( -4 dBs ), hi gh imped anc e (R C A p in jack ×8)

C: 0. 286V

Min i- D IN 4 pin c onnect or×2

PR: ±0. 35Vp- p

Y: 1Vp- p

10 80 i DTV (dig it al br o adcast) read y

(Digi t al-input term i na l is not com pa tibl e with co mput er sign al .)

(AA/R 6 /UM-3 bat ter y×2)

p-p

(bu rst si gnal, when t erminated with 75Ω)

,75

Ω (RCA pin jack×2)

,75

Ω (RCA pin jack×2)

,75

Ω (RCA pin jack×2)

(54MHz～80 4MH z)

2

No. 51989

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0

SAFETY PRECAUTIONS

V-48WP3

1. The desi gn of t his p ro duct c ont ai ns spec i al h ar dw ar e, m an y
ci rcu its a nd co mpon ent s s p ec i ally f or s afet y p ur pos es. F or
continued protection, no changes should be made to the
origina l des ign u nless a uth or i zed in wri ting by t he man ufactu re r.

Replacem en t par ts m ust be id ent ic al t o t hos e used in th e
origina l circui t s. Se r vic e s ho ul d be perfo rm ed b y qu ali fied
p ers onnel o nly.

2. Alte r ation s of th e desig n or c ircu itr y of th e p r oducts s houl d n ot
b e m ad e. A ny de sign alte ra tions or ad di ti o ns will vo id th e

manufacturer's warranty and will further relieve the
manu fac t urer of resp ons ibi lit y f or pe rs ona l i n ju r y or p r ope rt y
d am age r esult ing t heref rom .

3. M an y e lectrical an d mec h an ic al pa rt s in th e produ cts h ave
sp ecial s af ety-r elat ed charact eris tic s. Th ese charac teri sti cs ar e

oft en not e vid en t fr om visu al in spe ction no r can t he prote cti on
aff orde d by th em n ecess ar ily be o bta ined b y usi ng
replac ement compon ent s rated for h ig her vo l tag e, wa ttage, etc.
Replacem en t p ar ts t hat ha ve th ese s p 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 features are identified
by shading on the schematics and by (!!!!) on the parts list

in S erv ice manual. Th e us e of a su bst itu te re plac emen t whic h

does not have the same saf ety characteristics as the
reco mmen ded replac emen t pa rt sho wn i n the pa rts lis t of
Se rvi c e ma nu al m ay c ause sh ock, f ire, or o th er haz ards.

4. Use iso la tion tr ansfor me r when hot c hass is .
The chassis and any sub-chassis con tained in s ome products
are c onnect ed to on e side of th e AC p ow er l i ne . An i sola ti on
tr ansf or m er of ad equ ate cap acity sh ould be inser t ed bet ween
th e p rodu ct and t he AC p ow er s u pp ly p oi nt while p er for m i ng

an y ser vice on so me pr oducts when th e H OT ch assis is
exp ose d.

5. Do n't short between the LIVE side ground and I SOLATED

(NE UTRAL) side ground or EARTH side ground when
repairing.

So m e mod el 's p ow er c irc ui t is par t ly dif feren t in the GND. Th e
diff er enc e of t he GN D is s h ow n by th e LI VE : (") side GND,
th e ISO LAT ED(NEU TRAL) : (#) side GND an d EAR T H : ( $)
si de GND. Don 't sho rt be tw ee n t he LIVE s id e GN D a nd
ISO LATE D(N EU TR AL) si de GN D or EART H si de GN D and
never measure with a measuring apparatus (oscilloscope etc.)

th e LI VE s ide GND a nd ISO LATED( N EUTRA L) si d e G ND or
EARTH sid e GND at the s ame time.
If above note will not be kept, a fuse or any parts will be broken.

6. If any repa ir h as b ee n mad e to th e ch assi s, i t i s re com m end ed
th at t he B1 se tti n g s h ou ld b e chec ked or ad jus te d (S ee

ADJUSTM ENT OF B 1 POW E R SUPPLY).

7. The hig h volt ag e app li ed t o th e pi ctu re tu be mu s t c o nfo rm wit h
that specified in Service manual. Excessive high voltage can
cau se an incr ease i n X-R a y emission , arcin g and possi bl e
com po nent d am ag e, th eref or e op er atio n un der ex cess ive hi gh

vol ta ge c ond it i ons sh ou ld be ke pt to a min i mu m, or sh ou ld be
preve nt ed. I f seve re arc ing occu rs, r em ove th e AC p ower
immediately and determine the cause by visual inspection
(incor r ec t i nsta lla ti on , 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 pr op er mi ni m um l e v el of

soft X-Ra y emission, components in the high voltage circuitry
incl ud i ng the pi ctu r e tu be mu s t be the ex a c t r ep lac em en ts or
alte rn at ives a ppr o ved b y th e ma nuf actu r er of th e c o mp l ete
prod uct.

8. Do n ot c hec k high vol ta ge by d r awing a n ar c. U s e a hi gh
vol ta ge m ete r or a hi gh volt age p ro be wi th a VT VM . Disch arge

th e p ictu r e tu be bef ore a tte mp ti ng meter co nne cti on , b y
con nec ting a cl i p lead to th e gr ou nd frame a nd con n ec ti ng t he
oth er e nd of t he lead th roug h a 10 kΩ 2W resist or to t he ano de

bu tto n.

9. W hen s e rvice is r equ i r ed, ob s er ve th e orig inal l ea d dress .
Extra p r ecau ti on s h ou ld be giv en to assu r e cor re ct lea d dr es s
in the hi gh volta ge c ircu it area . W her e a s h ort ci r c uit ha s
occu rr e d, th ose 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 epl ace m ent c om p on ents.

10 . Isolation Check

(Safety for Electrical Shock Hazard)

Af ter r e- a s sembling th e pr od uct , always pe rf or m an i s o 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 udio input and out put t er min als, Con tr ol
knobs, metal cabinet, screwheads, earphone jack, control
sh afts, etc.) to be s ur e th e pr o duc t is saf e t o op er at e wi th out
d ang er of elect ri ca l shoc k.

(1) Di electric Strength Test

The is olat ion b etwe en the AC primary c ircu it and al l m eta l parts
exp osed t o the us er, par t icu l ar l y an y ex po sed metal p ar t 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 p eri od of on e sec ond.

(. . . . Withstand a volta ge of 1100 V 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 t est re qu ir es t es t e quip m ent not ge ne rally f ound
in t he serv ic e trad e.

(2) Leakage Current Check

Plug t he A C line cord direct ly i nt o th e AC ou tlet ( do not u s e a
line is olation transf ormer during t his che ck.) . Using a " L eakage

Current Test er", m ea s ur e t he leakag e cur r en t fr om each
exp ose d m eta l par t of th e c a bi ne t, p ar tic ul ar l y an y expo sed
metal part having a retu rn path to t he ch assis, to a kn own good
ea rt h gr o und ( water p ipe, etc.) . A ny l ea k ag e c ur r en t must not

exce ed 0.5m A AC ( r .m. s.) .
Howev e r, in t ro pical a rea, this m ust no t e xc eed 0 .2m A AC
(r.m.s.).

"""" Alte rn at e Che ck M et hod

Plug t he A C line cord direct ly i nt o th e AC ou tlet ( do not u s e a
line isolation transformer during this check.). Use an AC

vol tm et er h av i ng 100 0 ohm s per vol t or m ore s en s iti vity in the
follo win g ma nne r. C on nec t a 1 50 0Ω 1 0W resi s tor pa ralle l ed
by a 0.15μF AC - typ e cap acitor b etwe en an ex p ose d m eta l
p art and a k no wn go od earth gr ou nd (wate r pi p e, et c .).

Measu re th e A C vo ltag e acr os s th e r esist or wit h t he AC
voltmeter. Move the res istor connection to each exposed metal
part, particularly any exposed metal part having a return path to

th e ch assis , an d m ea sur e t he A C volta ge acr oss th e r esisto r.
Now, reve rs e the plu g i n t he A C out let a nd r ep e at e ach
measu rem ent. An y volta ge measu red m us t not exce ed 0.7 5V
AC (r.m. s.) . This corresponds t o 0 .5 mA AC ( r.m.s.).
Howev e r, in tr op ic al ar ea, this m ust n ot excee d 0.3V AC
(r.m.s.). This corr esp on ds t o 0 .2mA A C (r.m.s.).

AC VOLT MET ER
(HAVING 1000 Ω/V,

GOOD
EARTH

GR OUND

11 . High voltage hold down circuit check.

Af ter rep ai r of th e high vol t age h ol d d own c i r cuit, th is ci rcu it
sh all be c hec ked to op er ate cor rectly.
See item "Ho w to check the high voltage hold down
cir cuit".

This mark shows a fast
operating fuse, the

letters indicated below
show the r ating.

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

POWE R CORD
REPLACEMENT WARNING.

Co nne c t ing t he w hite l ine s ide of pow er
cord t o “WHT” character side .

A V

No. 51989

3

A

V-48WP30

FEATURES

"

New c h as sis d esign enabl e use of an i nt eractive on s creen con tr ol .

" 2-3P U LL DOW N : Yo u c an enj o y D VD m ovies at t he hi g hest pi ctu re q uality.
"

MO TION C OM PENSA TION : With this f unct i on, th e se amle ss r ep roduc tion of dynam ic mo tion on the scr e en has be en re al i zed .

" Bu llet - i n D SD ( D ig it al S upper D et ail ) circui t and 3 di m en sion Y/C se par at e cir cui t.
" Recei ve D TV br oad cast (10 80i / 72 0p / 4 80 p / 48 0i )
"

Built-in HDCP / Component (Y / PB / PR)

" Built-in Hyper Sound, B BE circuit.

HOW TO IDENTIFY MODEL

"AV-48W P30-ME” is i ndicated on the rating label of this model.

!

Parts nam e

RATING L ABE L GQ2 0001 -0 01A-A

!

MODEL

AV -48 W P 3 0 /ME

INDICATED [ AV-48WP30-ME ]

4

No. 51989

A

0

FUNCTIONS

■■■■ FRONT CONTROL KEY & T ERMINAL

V-48WP3

2

1

■

REAR TE RMINAL

5

4

3

1 MENU But ton ( O PE RA TE ▼ )

2 Cha nne l - /+ Button ( OPE RATE / )

3 VOL UME -/ + B utt on

4 MAIN POW E R SW Button

5 POWER LAMP (BLUE)

6

INPUT4

( AUDIO / VIDEO / S -VIDE O )

6

1

10

7

1

6

5

6

8

4

9

3

2

DIGITAL IN

( DVI- D Si gn al L ink 1 9pin )

2

INPUT 1

( AUDIO / VIDEO / S - VID EO )

3 INPUT 2

( AUDIO / VIDEO )

4

INPUT 3

( AUDIO / VIDEO / S - VID EO )

5 INPUT 2

( COMP ON EN T VIDEO )

6

INPUT 3

( COMP ON EN T VIDEO )

7 SP EAKER INPUT

8

AUDIO O UT

9

AV COMPULINK Ⅲ

A

AUDIO INP UT(For D IGI TAL IN)

No. 51989

5

A

V-48WP30

■■■■ REMOTE C ONTROL UNIT [RM- C322G]

3 2

4

5

6

7

17

9

10

12

14

15

16

188

11

13

21

22

1

POWE R Key

2

AS PECT K ey

3

VCR / DVD Key

4

TV / CATV Key

5

1

19

20

NATURAL CINEMA Key

6

INPUT K ey

7

DISPLA Y Ke y

8

SLEEP TIMER Key

9

BB E Ke y

A

V.S TATU S K ey

B

HYPE R SURROUND Key

C

MUTING Key ( Memory K ey for service)

D FUNCTION K ey ( ▲ / ▼ / / )

E

ME NU K ey

F

MUL TI SCREEN Key

G

NUMBE RS Ke y

H

10 0+ K ey

I

RETURN+ Key

J

LIG HT Key

K

V-CHI P Ke y

L

EX IT Ke y

M

VCR / DVD Key

■■■■ DIGITAL-IN TERMIN AL F UNCTIONS

PIN ASSIGNMENT

17

18

19

20

21

22

23

24

PIN

9

10

1

2

11

3

12

4

13

No .

1 RX2- 13 RX3+

2RX2+ 14 5V

3 GND2/ 4 15 GND

4

5 RX4+ 17 RX0-

6 SCL 18 RX0+

PIN NAME

RX4-

PIN
No .

16 HTPLG

PIN NAME

5

7 SDA 19 GND0/5

6

14

7

8

15

16

8NC20RX5-

9 RX1- 21 RX5+

10 RX1+ 22 GNDC

11 GND1/3 23 TXC+

12 RX3- 24 TXC-

6

No. 51989

A

0

INSTALLATION

1. INSTALLATION SITE

1. The re ar of thi s se t is pr ovid ed wi th ven tilation op eni n gs. I nst all t he s et
more t han 5 c m fr om a wa ll and i n a loc ation wit h g ood ve nti l a tion.

2. Avo id th e followi ng type s of locat ions.
(1) Unst able lo cat io ns ( l oca tion must b e able to with sta nd heavy w ei g ht).
(2) L ocatio ns subjected to direct sunlight.

(3) Near st oves or ot her heati ng dev i ces.
(4) L ocati o ns su bj ect ed to humidi ty or oily smoke .

(5) Dusty locations.
(6) L ocati o ns with s trong vibr ati on.

2. INSTALLATION ADJUSTMENT

When ins talling, mo vin g or ch an ging th e or i en tat i on of th e set , p er form

static con verge nce ad ju stm en t acc ordi ng to th e follo win g p roce dure.

V-48WP3

(more than 5cm)

Wall

VENTILATION OPENING

1. Pr ess the ME NU key of the r e mo te c ontrol un it .

2. Se lect the " CONV ERGENC E" in the INI TIAL SETU P menu with Function

▲/▼

key.

3. Pr es s th e F un cti on / key, th e co nve rg en ce ad ju stm en t scr een ap pears
wit h cross es ( +) d is playe d i n 9 l oc ation s.

Locations where the crosses appear in 3 colours:
Conver gence adj us tment i s r eq ui re d. Perf orm st eps 4 t o 5 .

Lo cat io n s wher e t h e c ross es are wh it e:

The con verge nce is adju ste d c o rr ect l y.

"

lf a ll th e cross es a r e w hit e, no c onve rg ence a dj ust me nt is ne ed ed.

4. The locat ions of the crosses correspond to the positions of the number keys on

th e r em ot e c ontro l. A b ox a pp ear s ar oun d the selec ted c r oss.

5. Pres s t he SE LEC T b utt on to ch ang e t he color of the b ox to th e c olor of t he

cross you want to adjust (red or blue).
" Yo u c annot adj u st th e gr een cross.

6. Use the / and / butto ns t o adjust the p osi tion of the cross.

" To c anc el the ad justmen ts bef ore com pl e ting th e pr oce du re, p r es s the E XIT

bu tto n.

7. Pr ess the ENTER butt on to end the c onve rg ence adj us tment pr oc e du re.

"

lf you do no t use th e T V co ntr ol s f or ro ug hly on e minu te, the con verge nce

ad justmen t s cree n autom aticall y d is appears.

Fi g.1

Fi g.2

No. 51989

7

A

V-48WP30

TECHNICAL INFORMATION

■ MAIN M ICRO C OMPUT E R ( CPU) FUNCTION

( M IN1 02 H5 7K )

PIN

№№№№

PIN NAME I/O

1 CONV. SW OOOO CONVER GE NCE SW

2 /VS YN C IIII V.SYNC IN f or OSD

3 LB PR O IIII LOW B Prot ection

4 NC － NC

5 /RST IIII Mico n R es et in pu t

6 CONV. BUSY OOOO CONV.

7 /TES T IIII +3.3V

8 YS OOOO OSD YS OUT

9 NC OOOO Micon test pin

10 NC OOOO NC

11 A_ MUTE OOOO TV S ou nd Muti ng

12 /HSYN C IIII H.sync in put for OSD

13 M_ MU T E OOOO Monito r Out Muting

14 OSDX I －

15 OSDXO

16 SD A2 OOOO I2C BU S ( SDA ) f or MTS

17 AC_IN IIII AC 5 0/60Hz i n

18 SCL2

19 TU _POW OOOO Tuner Power Control

20 VCOI

21 PDO

22 /IP_ RESET OOOO

23 YM

24 B

25 LE D_ POW ER

26 G

27 R

28 VR EF

29 IP_ ER R

30 IREF

31 COMP

32 AV DD

33 CLL

34 VR EFL S

35 SU B_ CCD

36 NC

37 VS S

38 MAIN _CCD

39 VR EFHS

40 CLH

41 VDD

42 LE D_ DATA

I/O FUNCTION

I/OI/O

－

OOOO

I2C BU S ( SCL ) f or MTS

IIII

LP F inpu t

OOOO

LP F outpu t

OOOO

OSD YM out

OOOO

OSD B lue ou t

OOOO

LE D f or P ower

OOOO

OSD G reen Out

OOOO

OSD Red Out

IIII

IIII

AMDP program load det.

IIII

IIII

IIII

+3.3V

IIII

For Sub CCD

IIII

STD VOL in for Sub CCD

IIII

For Sub CCD

－

NC

IIII

GND

IIII

For main CCD

IIII

STD VOL in for CCD

IIII

For main CCD

OOOO

+3.3V

OOOO

Front control Data

PIN

№№№№

PIN NAME I/O

43 LED_ C LOCK OOOO F. LED CLK

44 LED_ON_TIMER OOOO LE D on ti m er

45 SBO0 －

46 SBD0 －

47 AP DAT A －

48 INC －

49 ECO RST OOOO Eco Reset

50 ROT COIL L OOOO Picture rotati on

51 ROT COIL R OOOO Picture rotati on

52 H BL K OOOO H.BLK

53 SN COIL_R OOOO

54 SN COIL_L OOOO ↑

55 BS POW OOOO BS power control

56 I2C STOP OOOO I2C BU S S TOP

57 NC

58 /LO B_P OW OOOO LO B p ower co ntr ol

59 COMPULINK IIII AV Compu linkⅢInput

60 /POWE RGOOD

61 /ME C A_O N IIII Machi n e SW Interrup t

62 /MA IN_PO W

63 NC

64 /B1 POW OOOO B1 POW E R CO NTR OL

65 C / N

66 X- R AY

67 EE CDS

68 KE Y2

69 KE Y1

70 SC L1

71 SDA1

72 REMO

73 AP REQ

74 VS S

75 OSC 2

76 OSC 1

77 VD D

78 SC L0

79 AP CLK

80 SDA0

81 NC

82 NC

83 NC

84 P MUTE

I/O FUNCTION

I/OI/O

Terrestrial Magnet ism Sen sor

－

IIII

Po w er C ond i tion Ch eck

OOOO

MA IN POW E R CO NT R OL

－

NC

－

IIII

X-ray detection

－

IIII

Fr ont Key i npu t 2

IIII

Fr ont Key i npu t 1

OOOO

I2C BUS (CLK) f or E2PROM

I/O

I/O

I/OI/O

I2C BUS (SDA) f or E2PROM

IIII

Remocon IN

－

IIII

GND

OOOO

4MHz OS C

IIII

4MHz OS C

IIII

+3.3V

OOOO

I2C BUS (CLK ) f or G enera l

－

I/O

I/O

I/OI/O

I2C BU S ( SDA ) f or Ge ner a l

－

－

－

NC

OOOO

Picture muting

8

No. 51914

A

0

MAIN PARTS LOCATION

■

PWB ASS’Y ARRANGEMENT

The PW B A SS’Y is indic at ed belo w.

V-48WP3

"

MAIN PWB ASS’Y (SS B- 10 51 A-M2)

" POW E R & DEF PW B ASS’ Y (SS B- 20 52A -M2) " CONVERGE NCE OS D PW B AS S’Y (SS B0T0 51A- M2)
"

R C RT SOCKET PWB A SS’Y (SS B-31 51A -M2)

" G CRT SO CK ET PWB ASS’Y (SS B- 325 1A -M2)
"

B CR T SO CK ET PWB ASS’ Y (SS B- 33 51 A-M2)

" R VM PW B ASS’Y ( SS B- 71 51A-M 2) " LINE FILTE R PWB A SS’Y ( SS B- 90 51A -M2)
"

G VM PWB ASS ’Y (SS B- 72 51A -M2)

" B VM PWB ASS ’Y (SS B-73 51 A- M2) " I-P CONVERT MODULE PWB ASS’Y (SSB0D051A-M2)
"

FR ON T CONTROL PWB ASS’ Y ( SS B0L 05 1A- M 2)

" REMO CO N SENSO R PW B AS S’ Y (SS B- 80 51A -M2) " AV JACK P W B AS S’ Y ( SS B0J051A-M2)
"

DIGITA L INP UT MODULE PWB ASS’Y ( SS B-7851 A-M2)

FRONT CONTROL ASS’Y

REMO CO N SENSO R
PWB

"

CONVER GE NCE PW B AS S’ Y ( SS B- 50 51A -M2)

"

CEN TER SP EAK ER PW B ASS’Y (SS B0A05 1A- M 2)

" DIGITA L CON VERG ENCE M ODULE PWB A SS’Y

"

DEF OSC PW B ASS’Y (SS B0H0 51A -M2)

"

FRONT I/F PW B ASS ’Y (SS B0L 251A-M2)

"

REC EIVE R PWB AS S’Y (SS B0R251A-M2)

(Included in CONVERGENCE PWB)

PROJ ECTION UNIT

FRONT CONTROL
PWB

DIGITAL
CONVERGENCE

MOULE PW B

CONVER GE NCE O SD
PWB

CONVERGENCE
PWB

FRONT I/F
PWB

I-P COVE RT MO DUL E
PWB

LINE FILTE R
PWB

AV JAC K PW B

RECEIVER PWB

POWE R & DEF
PWB

MAIN PWB

CRT SOCKET
PWB (R/G/ B)

CEN TER SP EAKER
PWB

DEF OSC
PWB

AV TERMANEL BOARD

(This fi gure is only MAIN UNIT)

VM
PWB (R/G/ B)

DIGITAL INP UT
MO DUL E PW B

No. 51989

9

A

V-48WP30

s

SPECIFIC SERVICE INSTRUCTIONS

SCREEN HANDLING CAUTIONS

■■■■SCREEN STORAGE

St ore th e SC RE EN AS S’Y i n a st an ding pos ition in ord er to avo id d eform at ion. If th e scr e en is s t ored h orizo ntal l y, th ere i s risk of deforming the
screen face.

When n ecessa r y t o pla ce th e SCRE EN ASS ’ Y h orizont all y, po sition the s creen side u pw ar ds an d s u re to p lace s pac ers betw een th e scr een and
resting site (f loor or st an d etc.) to pr event the s cree n f rom sag gi ng .

■ SCREEN SURFACE

Sinc e the scre en s urfac e is ea sil y scr atch ed or soiled , u se a m ple c are w he n han dling .

% DISASSEMBLY PROCEDURE

If the screen or sc reen panel n ee d to

b e r ep la c ed, rem ove th e A s crews

FRONT CABINET

SCR EEN B R ACKET ( TOP)

A(X3)

SCR EEN B R ACKET ( R IGH T)A(X4)

L eave th e scr ee n with fres nel len s an d
d oub l e l en tic ular l en s att ached. If c an no t be

disass embl ed fu rt her .

SCR EEN

SCR EEN B R ACKET
(LEFT)

SCR EEN B R ACKET
(BOTTOM)

A(X3)

A(X4)

PROJECTION UNIT REPLACEMENT

■ ADJUSTMENT DURING REPLACEMENT

When r ep la c ing the thre e R, G and B pr o jection u ni ts , f irst r ep l ace th e R a nd B uni ts and p erfor m foc us / s creen / r ast er cen tering adjustments

wit h ref er en ce to th e G unit. The n r e plac e t he G un it and per fo rm G f ocus / scr ee n / c onve rgen ce ad j ustm en t. F in al l y per f orm R & B .
Conver gence adj us tm ents . Use care to simultaneously removes all three-projection units.

■ DISASSEMBLY CAUTION

The proj ec tion units inc l ud e l o catio ns th at are not to be disas s embl ed dur in g s ervice . Whe n rep laci ng proj ec tion unit part s, d is assemble to the
state i n dicat ed in th e f ig ure bel o w.
The figu re ind ic ates scr ews an d wires t hat ar e not to be rem ove d. Us e c ar e no t t o r em ove th ese.

R CRT SOCKET PW B ASS’ Y

& Deflec tion yoke wires : to con nec tor on POWER & DEF. PWB ASS ’Y.

[R=”RHV”, G=”GHV”, B=”BHV”]

& Convergence yoke wires : to connec tor on CONVERGENCE PW B ASS’Y

[R=”R”, G=”G”, B=”B”]

Check that t ape is ap pli ed to the CRT n eck.

If absent, the d efl ec tion yoke can disl o dge.

PC M AGN ET

PC M AGN ET
TAPE

G CRT SO CK ET PWB ASS ’Y

B CR T SO CK ET PWB ASS ’ Y

VM PW B PW B (R/G/B )

Do not remove screw

LENS AS S’Y

DEF / CO NV ER. YO KE

LENS AS S’Y S CREW (X 4)

10

No. 51989

CRT ASS’ Y( CO UPLE R ASS’Y)

Do not disassembly

●

ANODE wires : to DI VIDER

A

0

DISASSEMBLY PROCEDURE

V-48WP3

!

SPEAKER GRILLE

1. Remove 4 screws A fro m r e ar side .

2. Remove th e SPEAK ER GRILLE.

! SPEAKE R (WOOFER)

"

Rem ove the SP EAKER GRIL LE

1. Remove 4 screws B.

2. Tak e ou t th e W O OFER .

3. Disc onnect t he s p eaker wir e f rom s pe ak er t ermin al.

! SPEAKE R (T WEETER)

"

Rem ove the SP EAKER GRIL LE

1. Remove 2 screws C.

2. Tak e ou t th e TW E ETER .

3. Disc onnect t he s p eaker wir e f rom s pe ak er t ermin al.

!

FRONT BOARD

" Rem ove the SP EAKER GRIL LE.

1. Remove 4 screws D.

2. Rem ove th e FRONT BOA RD.

! FRONT CONTROL BOX

"

Rem ove the SP EAKER GRIL LE.

1. Remove 4 screws E attach ing th e FRONT CON TROL BO X.

2. Disc onn ect th e con ne ctor BH

CONTROL PWB.

3. Remove the FRONT CONTRO L BOX.

, X ,

R ,

BG on th e F R ON T

SP EAKER WIRE

B

SP EAKER

(WOOFE R)

SP EAKER

(TWEETER)

F

A

C

E

D

FRONT CONTROL BOX

FRONT BOARD

SP EAKER GRILL

A

!

FRONT CONTROL PW B

" Rem ove the SP EAKER GRIL LE.
"

Remove the FRONT CONTROL BO X.

1. Remove 3 screws F f rom r e ar side of FRON T CON TROL BOX .

2. Remove the FRONT CONTRO L PW B.

CAUTION AT DISASSEMBLY

48 W P30CP -S

: DIGI TAL INPUT MODUL E

SB

AV JAC K B OARD

PO W E R CO RD

con nec tor

BH

FRONT CONTROL BOX

REAR SIDE

X R BG

FRONT CONTROL PWB

" Prior t o di sassem bly, unplu g t he p ower co de fro m t he AC outlet

wit hout f ai l . ( Turn t he powe r “off ”.)

"

Short t he SB conne ctor (1) p in and (2) pin of the D IGITA L

INPUT MODU LE. (A t the t ime of asse mbling)

"

Be fore th e rea r p ane l i s ins ert ed i nt o t he cab i net , r el e as e th e

sh ort- cir c uit b etwe en the S B c onn ect or (1) p in an d (2 ) pi n of th e

DIGITAL INP UT MODU LE .

" After releasing the short-circuit between the SB connectors, do

not turn the power on until the rear panel is inserted into the

cab inet .

*

Neglig ence i n c a rr ying out th e a bov e ste ps m ay ca use th e

inact ivation of the TV .

No. 51989

11

A

V-48WP30

! SCREEN ASS’Y

" Rem ove the SP EAKER GRIL LE.
"

Remove the FRONT CONTROL BO X.

1. Remove 4 sc rews G u nd er th e S CREE N ASS ’Y from f r ont side.

2. Remove 10 screws H f ro m r e ar si de .

3. Remove the SCREEN ASS’Y.
NOTE :

"

Plac e the sc r e en with f ace up w ar ds on a flat sta nd.

" Be caus e of th e l a rg e si ze, at l ea s t t wo p ar son s ar e

reco mmen ded f or r em ov a l and reas sem bl e.

" Use c ore n ot t o scratc h the scre en du ri ng w or k.
"

D ur i ng ass embl y, be sur e to en gage th e left an d ri g ht ta bs

wit h the c abin et mount ing posit ions.

"

When tha n sp orting th e SC R EE N ASS’ Y, a voi d gr a sping th e

top of the sc r e en pan el, in ste ad gr asp th e left and rig ht a reas.

!

MIRR OR

"

Rem ove the SP EAKER GRIL LE.

" Remove the FRONT CONTROL BO X.
"

Remove the SCREEN ASS’Y.

1. Remove 2 sc rews I at tach ing th e mirror st opper.

2. Rai s e sli gh tly t o dis engag e of th e m i rr or f rom the hook s.

3. Rem ove the M IR RO R.

NOTE :

" The MIRROR i s fr o nt-coated. Do not t ouch t he front of the

MI RRO R.

" At least 2 persons are recommended for removable and

reass emb le.

ＧＧＧＧ

ＧＧＧＧ

SCREE N ASS’Y

H

HOOKS

M

MIRROR

! REAR PANEL

1. L oosen 7 scr ews J.

2. Remove 4 sc rews K.

3. Raise slightly REAR PANEL upward.

4. R emove th e REAR PANEL .

NOTE :

" Be for e th e re ar pan el is i ns ert ed int o the c abin et, relea se th e

sh ort-c i r cuit be tw ee n th e SB con nect or (1) p in an d ( 2) pi n of
th e digit al i np ut unit. (R ef er t o CAUTION A T DISA SSEMB LY

(Page.11)).

" Af ter releas ing th e sh or t-ci rcu it b etw e en the SB co nn ec to rs,

d o no t tur n the po we r on u ntil th e r ea r pan el is in serte d i nt o
th e ca bi ne t.

!

PARTITION

" R emove th e R EA R PANEL .

1. Pu ll out the PARTITION b ack ward.

! REAR COVER

"

Rem ove the SP EAKER GRIL LE.

" Remove the FRONT CONTROL BO X.
"

Remove the SCREEN ASS’Y.

1. Remove 2 sc rews L.

2. Remove 2 sc rews M from front side

3. Slight l y pu l l f or ba ckside t o d is engag e of the REA R COV ER from

hooks.

4. Remove th e REA R CO VER .

I

MIRROR STOPPER

PARTITION

J

J

K

J

M

BRACKET

REAR COVER

L

L

REAR PANEL

12

No. 51989

A

V-48WP3

0

! MAIN UNIT

" Rem ove the SP EAKER GRIL LE.
" Remove the co nne c tor BH , X , R , BG on th e

FRONT CONTROL PWB.

"

Remove th e REA R PANEL .

1. Remove 4 sc rews O!from f ront s id e.

2. Pu ll out the MAIN UN IT rea r s ide.

NOTE :

"

Exce pt f or c o nfir ma tion of project ion of images on th e s creen

an d aud i o ou tpu t throu gh th e spe akers, th e re mo v ed mai n

unit is still workable in the same state a s if it is still built in the
TV set . Th er efo re, t he mai n unit ca n b e r em ov e d, if

n ecessary, f or b oa rd di ag no sis, elec tric t esti ng , e tc . apart
fr om co nfi r ma tion of scr een images and audi o o utput.

"

When wire cl am ps ar e rem ov ed du rin g wor k , us e care to

restore the m pr ecisel y to t he ir origin al pos itions.

Pe rf or manc e ca n be af fect ed if the se ar e n ot retur n ed to t he
origina l pos iti ons.

" Be caus e of th e l arg e si ze, a t le ast t w o p ersons ar e

reco mm en ded f or r em ov al a nd reas semble .

" W hen c arrying the main un it, us e ca r e not t o dr o p, sh ock or

sh ake it .

" Do n ot st ain or d am age th e le ns of t he project ion unit .
"

Do n ot l ook t hrou gh the pro j ection u nit.

# CHECKIN G THE P.W. BOARD

When ch ecking th e MAIN PW B , P OW ER & DEF PWB, etc., raise
th e MAIN UNIT with t he DIVID ER side down fo r t he sa ke of

con venienc e. You c an c h ec king the MAIN P .W.B.

! LINE FILTER P.W. BOARD

"

Remove th e REA R PANEL .

" Remove the AV JACK BOARD.

1. Disc onnect th e c on ne ctor B F on the LINE FILTER P.W.

BOA RD.

2. Remove 3 screws P att ac hi n g the L INE FILTE R BRA CK ET and

ea rt h w i r e.

3. Remove 2 sc rews Q atta ching LI NE FILTE R P.W. B OARD .

4. Remove th e LINE FILT ER P.W. BOAR D.

O

F

EARTH WIRE

P

P

EARTH WIRE

MAIN UNIT

B

LINE FILTER BRACKET

Q

LINE FILTER P.W.BO ARD

LINE FILTER BRACKET

!

MAIN CHASSIS

"

Remove th e REA R PANEL .

" Remove the AV JACK BOARD.
"

Rem ove the L IN E FILT ER BRACKE T.

1. Remove 2 sc rews R b oth side of th e MAIN CHASS IS.

2. Remove 1 sc rews R’ att ach ing t he ea rt h wire.

3. Pu ll out the MAIN CH ASS IS f or back side.

NOTE :

" If ne cessar y, r em ove the anod e wir es, co nn ecto rs,

respectively.

EARTH WIRE

R

P

MAIN CHASSIS

R’

R

No. 51989

13

A

V-48WP30

! PROJECTION UNIT

" Rem ove the SP EAKER GRIL LE
"

Remove the FRONT CONTROL BO X

"

Remove th e REA R PANEL

" Remove the MAIN UNIT.

1. Remove the CRT SOCKET PWB.

2. Remove 4 sc rews S attach ing th e PROJE CT ION UNIT.

3. Pull out the PROJE CTI ON UNIT, up ward.
NOTE :

"

Refer to “PROJE CTI ON UNIT REPLA CEM ENT” on

p age 10 whe n t aking ou t a nd re placi n g the

PROJE CT I ON UNIT.

" When wire clamps are r em ove d d ur i ng wor k, u se c are to

restore th em pr ec is ely to th ei r or i gi n al p osi ti on s.
Pe rf orm ance can b e aff ecte d if thes e ar e not retu rned to

th e or i g in al p osition s.

! HV DIVIDER

" R emove th e R EA R PANEL

1. Remove 1 sc rews T

2. Remove the HV DIVIDER.

* W ires of the t ra nsf or m er (FBT) a nd CRT of ea ch P RO JECTION

UNIT can be removed by turning the connector portions.

NOTE :

"

If necess ar y, r em o ve th e an ode w i re s, a nd re pl acin g th e

HV DIVIDE R, take care to correctly engage the

!!!!

U

con nec tor.

!!!!

attaching the DI VIDER.

! AV J ACK BOARD

" R emove th e R EA R PANEL

1. Remove 7 sc rews V.

2. Pull out the POWER CORD CLAMP from AV JACK B OARD left

si de.

3. Rem ove nut W

4. Remove the AV JACK BOARD.

!!!!

att achin g the an te nna t ermi n al .

PROJ ECTION UNIT

HV DIVIDER

TurnPull

T

U

X

DIGITAL INPUT

MODULE

W

ANTENNA TERMINAL

S

AV JACK BOARD

V

! DIGITAL INPUT MODULE

"

Remove th e REA R PANEL

1. Remove 2 sc rews X from r ea r side of the AV JAC K BO ARD.

2. R emove the DIGITAL INPUT MO DUL E.

NOTE :

"

When r emo ving th e DIGITA L I NPUT MODULE, ref er to

th e "C AU TION AT DISA SSE MB LY"　sect ion on p ag e 11.

14

V

POWER CORD CLAMP

No. 51989

A

0

REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating for more than 3 seconds.

2. Do n ot ru b t he el ect ro des an d t he r esist p arts of the p att er n.

3. W hen rem oving a c hi p par t, m el t th e s older ad equate ly.

4. Do n ot r euse a ch ip p ar t afte r re mo v ing it .

! SOLDERING IRON

1. Use a hig h i ns ulatio n s older i ng iron with a t hin poin ted end of it.

2. A 3 0w s older ing i r on is r ecommend ed for easil y r em oving p ar ts.

!

REPLACEMENT STEPS

1. How to remove Chip parts

####

Resi st o rs, capacitors , etc

(1) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt the s ol de r at eac h end.

(2) Sh if t with tweeze rs and r em ove th e c h i p p art.

#### Tran s istor s, diodes , varia bl e r esistor s, etc

(1) Ap pl y e xt ra so ld er to eac h le ad .

V-48WP3

2. How to install Chip parts

####

Resi st o rs, capacit ors , etc

(1) Ap ply sold er to the pattern as indic ate d in the figure.

(2) Gr asp the c h i p p art with tw ee zer s and pl ac e it on th e s old er.

The n hea t and me lt th e so lder a t both ends of t he chi p part.

#### Tran s istors, dio des , va ria bl e r esist or s, etc

(1) Ap ply sold er to the pattern as indic ate d in the figure.
(2) Grasp the ch ip p art wit h t we ezers and p lace it on th e so lder .

(3) First s older lead A as indica ted in t he figure.

SOLDE R SOLDE R

(2) As sh own in the f ig ur e, pu sh th e pa rt w ith tw ee zer s and

alte rn at ely melt th e sol d er at each le ad . S hi ft an d r em ove the
chip part.

(4) T he n s o ld er l e ads B and C.

Note : A fte r re moving t he part, r emove rem ain ing solder fr o m the

pattern.

No. 51989

A

B

C

A

B

C

15

A

V-48WP30

1.PICTURE/SOUND

I2C BU S

RF AFC

6

VALUE
VALUE

ITEM

ITEM
EXIT

MEMORY

DISPLAY

SLEEP

VIDEO

MEMORY IC REPLACEMENT

1. Memory IC

This model use a memory IC.
Thi s me mo r y I C st or es d ata for pr op er op er ati o n of the vid eo

an d d ef lecti on c ircu it s.

When replacing, be sure to use an IC containing this (initial
valu e) data.

2. Memory IC replacement procedure

(1) Power off

Switch of f t he p ow er an d dis con nec t th e power co rd from
the wall outlet.

(2) Replace the memory IC

Init ial value m ust be entered into the n ew IC .

(3) Power on

Connect th e pow er c or d t o the wa ll o utlet an d s witc h on t he

power.

SE RVICE MENU

SERVICE MENU

2.YC SEP 8.PP

3.LOW LIGH T 9.IP

4.HIGH LI G HT 0.SELF- CH K

5.
.

7.

Fig.1

SERVICE MENU SELECT KEY

(4) SERVICE MENU setting

1) Pr ess SLEEP TIMER k ey an d, w hi l e the in dicat ion of

SLEE P TIM ER 0 M IN is being displayed, press
DISPLAY key and VI DEO ST ATUS key on the remote

control un it (Fig.2) simultaneous ly.

2) The SER V ICE M ENU sc r ee n of F i g.1 is d isp l ay ed .

3) Verif y what to set i n th e SERV IC E MEN U , and set

what ever is n ec essar y ( Fig.1) .
Refe r to t he SERVI C E ADJU STMENT f or s ett in g.

4) Pr ess the EX IT key t wice to return normal screen.

(5) Rec eiv e channel setting

Refe r to the OPERATIN G I N STRUCTIO NS ( USER ’S

GUID E) a nd set th e rece ive ch an nel s (Chan n els Pr eset ) as
described.

(6) User se tt ing s

Check th e us er s ett ing it ems ac c ordi ng to aft er pa ge .
Wher e th ese d o not a gr ee, r efer to t he OPE RAT ING

INSTRUCTIONS (USER’ S GUIDE) and set th e items as
described.

TIMER

STATUS

(MUTING )

SELECT( －)

FUNCTION

MENU

POWER

NUMBER

SELECT(▲)

SELECT(＋)

SELECT(▼)

16

Fig.2

No. 51989