JVC AV-T2922/AR Service Manual

SERVICE MANUAL

COLOR TELEVISION

AV-T2922

BASIC CHASSIS

GA

AV-T2922

/AR

CONTENTS

! SPECIFICATIONS ････････････････････････････････
!

SAFETY PRECAUT IONS

!

FEATURES････････････････････････････････

! FUNCTIONS ････････････････････････････････
!

SPECIFIC SERVICE INSTRUCTIONS

! SERVICE ADJUSTMENTS ････････････････････････････････

★ STAND ARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････

! PARTS LIST ････････････････････････････････

1

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COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

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･･･ 4

･･････

･･ 5

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･････ 2- 1

･･････････

3

6

No.519 17
Mar. 2002

A

V-T2922

)

SPECIFICATIONS

Items Content

Dimensions (W××××H××××D) 29-5/8 ×23-1/4 ×20 -5/8 / 75.2cm×59.0 cm×52.2 cm

Mass 90.9Ibs / 41.3kg

TV System and Color system

TV RF System CCIR(M), CCT R(N)

Color System PA L-M / P AL- N / NTSC

Sound System BTSC (M ulti Channel S ound)

Picture Tube 29 (74 cm ) m easur ed di agonally, Full S quare

Hi gh V ol ta ge 29 kV±1.3 kV (at zer o beam cur rent)

TV Receiving Frequency

VL B and (02～06) 55 .25 MHz～83.25MHz
VH Ba nd (07～13) 1 75. 25MHz～21 1.25MHz

UH F Ba nd (14～69 ) 471. 25MHz～80 1.25MHz

CAT V Receiving Frequency

Low Band (02 ～06)

Hi gh B and (07 ～13)

Mid Band (14 ～22)
Super Band (23 ～36)
Hyper Band (37 ～64)

Ul tra Ba n d (65 ～94, 10 0～125)

Sub Mid Band (01, 96～99)

Intermediate Frequency

Video IF Carrier

Sound IF Carrier 41.25M H z (4.5MHz)

Color Sub Carrier

PAL-M 3.57561149MHz

PAL-N 3.5 8205625MHz

NT S C 3.579545MHz

Power Input

Opera ting Voltage 90V～260V A C, 50Hz/ 60Hz

Rated Voltage

Power Consumption 115W(max.) , 85W (avg.)

PICTURE : 45.75MHz
CHROMA : 42.17MHz

120V～24 0V AC , 50Hz/60Hz

(55.25MHz～79 9.25MHz)

Speaker 2×4-3/4” / 5×12cm Oval type×2

Audio Power Output 5W+5W

Input / Output terminals

Input 1, 2 (V, L/R

Variable Audio Output

Antenna terminal 75Ω(VHF/ UHF) Termi nal, F-Type Connecto r

Remote control unit RM-C363-1H (AA/R03/UM-4 dry cell battery×2)

Video : 1Vp -p , 75 Ω (RCA pin jack)
Au dio : 50 0mVrms ( -4dBs), Hi gh Imp edance (RCA p in jack)

More then 0～1550mVrms (+6dBs )
Low Impedance ( 400 Hz w hen modulated 100%) (RCA pin j ack)

Design & specifications are subject t o change wit hout notice.

2

No.51917

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2

SAFETY PRECAUTIONS

V-T292

1. The d esign of th is pr od uct con tains special hardware , ma ny
circuit s and components specially for saf ety purposes. For
con tinu ed pr ot ection, n o changes shou ld be made to the o riginal
desi gn un less a uth or i zed in w riting by the manu facturer.

Replacement p ar ts must b e id ent ic al to thos e u sed in the origi n al
ci rcu it s. S er vic e sho uld be performed by qu al if ied pers on nel
only.

2. Alterations of t he desig n or cir cuitry of t he prod ucts sh ould not be
made. Any design alterations or additions will void the
manufact urer 's warr a nt y and will f urth er relieve t he ma nu factu r er
of resp onsibility for perso na l injur y or property dam ag e r esult ing
th erefr om.

3. Man y electr ical an d m ech anica l parts i n the prod ucts ha ve
special safety-related characteristics. These characteristics are
oft en no t e viden t f rom visua l i nspection n or can t he pr o tect io n
aff or de d by th em necessari ly be ob tain ed by using rep lac ement
com po ne nts rated for hig he r vol tag e, watt ag e, etc. Rep l acement
parts wh ic h have these speci al s afety ch aract erist ics are

identified in the parts list of Service m anual. El ectric al

components having such features are identifi ed by shading
on t he sche matic s and b y (!!!! ) on the parts list in Service
manual. The us e of a sub stitute r ep lacem en t whi ch does n ot

have the sam e saf ety ch ar act erist ics as the reco mmen de d
replac em ent par t sh own in the parts li st of Ser vice manual may

cause shock, fire, or other hazards.

4. Don't shor t between the LIVE side ground and ISOL ATED

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

Some model's power circuit is partly different in the GND. The
diff erenc e of th e G ND is shown b y th e LIVE : (") side GND, the
ISO LATE D(NEUTRAL) : (#) side G ND and EAR TH : ($) side
GND. Do n't short bet ween th e LIVE sid e GND an d

ISO LATE D(NEUTRAL) side GND or EARTH side GND an d
never m ea sure wit h a m ea suring apparatus (oscil loscop e etc.)
th e LI VE sid e GN D and IS OLATED(NEUTRAL ) side G ND or
EARTH side GND at th e s ame time.
If above note will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended
th at t he B1 setting should b e ch ecke d or adjusted (See
ADJUSTMENT OF B 1 POWE R SUPPL Y).

6. The hi gh voltage applie d t o th e pi cture tu be must con form w it h
th at speci fi ed i n S er vice manual. Excessive h igh voltage ca n

cau se an incr e ase in X-R ay emission , ar cing an d possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
preve nt ed. If s ever e arc ing occurs, r em ove t he AC power

immed iate l y and determine the ca use by visua l insp ection
(incorrect in stallat ion, cr acke d or melted high vo lt age harness,
poor so ld ering, et c.). To maint ain the p r ope r minimu m level of
sof t X- Ray em i ssion, c omponents in the high voltag e cir cuitry
including the pict ur e tube must be t he e xact r ep lacem e nts or

alternat ives approve d b y th e ma nuf act urer of th e c omplete
product.

7. Do not c heck hi gh volt age by dr awing an arc. U se a high voltag e
meter or a high v oltag e pr ob e wit h a V T VM . D ischarge th e
picture tube before attempting meter connection, by connecting

a cl ip lead to th e gr ou nd frame and conn ecting the oth er end of
the lead through a 10kΩ 2W resisto r to the an od e butt on .

8. When se r vice is requ ired, obser ve th e or igina l lea d dr ess. Extr a
prec aut ion sh ou ld b e g iven t o assure cor r ect lead dress in the
high voltag e cir cuit area. W her e a s hort ci r cuit has occu rred,
th ose co mp on ent s tha t indi cate evi de nce of overheating sho ul d

be replace d. Alwa ys use th e manuf act urer's r ep lacem en t
components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

Af ter re-ass emb ling the p r odu ct, always perf orm an isolation
ch eck on the expo sed metal parts of t he cabin et (ante nn a

termina ls, video /audio inpu t and ou tput t ermin als, Control kn obs,
metal cab ine t, screw h eads , ear p ho ne j ac k, c ont rol shaft s, etc .)
to be sure th e p rodu ct is s af e t o o perate without d an ger of
elect rical shoc k.

(1) Dielectric Strength Test

The isolation between the AC prima ry circuit and all me tal p arts
exp osed t o th e user, p articul arly an y expos ed metal part havi ng a
return path to the 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 hstand a vo lt ag e of 1 10 0V A C (r.m.s.) to an applianc e

rated up to 12 0V, an d 3 00 0V AC (r .m.s.) to an applian ce r at ed
200V or more, for a period of one second.)
This method of test requires a t est equipment n ot generally found
in the ser vice trad e.

(2) Leakage Current Check

Plug th e A C line c ord d irect ly in to the AC outlet (do not use a lin e
isolation transf ormer during this ch eck.). Using a " Lea kage

Curr ent Tester", measure th e leakag e curre nt f rom each exposed
metal part of the ca bi ne t, particu larly any e xpos ed metal part
havi ng a r e tur n path to t he ch ass is , to a kn ow n go od ea rt h
ground (wa ter pip e, etc.). An y l eakage cur r en t m ust n ot e xceed

0.5mA AC (r.m.s.).
However, in tropic al area, th is must no t exceed 0.2 mA AC
(r.m.s.).

"""" Alternate Ch e ck M ethod

Plug th e A C line c ord d irect ly in to the AC outlet (do not use a lin e
isolation tran sformer dur ing t hi s che ck.). Use an AC vo ltmeter

havi ng 1 00 0 oh ms per volt or more sens itivity in the fo llow ing
manner. Connec t a 1 500Ω 10W res istor paralle le d b y a 0.1 5µF

AC-type capacit or bet ween an expo sed met al part and a known
good earth gro un d (water pipe, etc.). Meas ur e the AC vo lt ag e
acr oss th e res ist or with th e AC voltmeter. Move the resistor
con nec ti on to e ach exp ose d me tal par t, p art icul ar ly any exp osed

metal part havi n g a r etu rn pat h to t he ch assis , an d m easure the
AC voltag e ac ross the res ist or . No w, rever se th e plug in th e AC
outlet and re pe at eac h mea surem en t. An y volt ag e me asured
must no t exceed 0.75V AC (r.m.s.). This c orre spo nds to 0.5mA
AC (r.m.s.).

Howeve r, in tropica l area, this must not exce ed 0.3V AC ( r .m.s.).
This corresponds to 0.2mA AC (r.m.s.).

AC VOLT METER
(HAVING 1000 Ω /V,
OR MOR E SENSIT IVITY)

0.15μF AC-TYPE

PLACE THIS PROBE

1500 Ω 10W

GOOD EARTH GROUND

ON E A C H EX PO SE D
ME T AL PA R T

No.51917

3

A

V-T2922

FEATURES

" The stable image proces sing ci rcui t wh ic h is al ready acknowledged en ables p owerfu l image expression by t he 29 in ch big scr een.
"

Multifunct ion al remote con trol p ermits picture adjustment.

"

With AUDIO / VIDEO inpu t termina l.

" Variable aud io outpu t termina l.
" Ad opti on of the VIDEO STATUS f unc tion .

"

Ad option of the SLEEP TIMER f unction .

"

With 75ΩV/U i n c ommon (F-Type) antenna terminal.

"

Wide range voltage (120V～240V) AC power i npu t.

"

I2C bus control utilizes single chip ICs.

" Built-in HYPER SURROUND system.
"

CLOSED CAPTION broadcasts c an be viewed.

MICR O COMPUTER PORT ASSIGNMENT (IC701)

PORT NUMBER PORT FUNCTION PORT NUMBER PORT FUNCTION

1 H SYNC 27 Vcc

2 V S YNC 28 OSC1

3 RF AFC 29 OSC2

4 REMOCON 30 RESE T

5 NECK 31 POW ER ON/OFF

6 SD 32 ENAB LE

7 T ON/O FF 33 CLOCK

8 KE Y2 34 DATA

9 KE Y1 35 LO CK

10 SP ON/OFF 36 SDA2

11 NC 37 SDA1

12 NC 38 SCL2

13 NC 39 SCL1

14 AUDIO MUTE 40 Ym

15 I2C H/S 41 BUS FREE

16 NC 42 NC

17 NC 43 SELECT1

18 A Vcc 44 SELECT2

19 HLF 45 AGC MUTE

20 RVCO 46 AGC ADJUST

21 V HOLD 47 TV / EXT

22 Composite VIDEO IN 48 X-RA Y / OCP

23 CN Vss 49 Ys

24 X IN 50 B

25 X OUT 51 G

26 Vss 52 R

4

No.51917

A

2

FUNCTIONS

FRONT CONTROL KEYS

①①①①②

②③

②②

① MENU / OPERATE ▼ key
②

③

④

⑤

③④

③③

④⑤

⑤

④④

⑤⑤

REAR TERMINALREMOTE CONT RO L UNIT (RM-C363)

CHANN EL ― /＋ or

OPERATE / keys

VOLUME ― /＋ keys
POWER button
LED (indicator)

････

Red
Green･･On Timer indication

Power indication

V-T292

①①①①
②②②②

③③③③

④④④④

⑤⑤⑤⑤

⑥⑥⑥⑥

⑦⑦⑦⑦
⑫⑫⑫⑫

⑧⑧⑧⑧

⑨⑨⑨⑨

⑩⑩⑩⑩

⑪⑪⑪⑪

⑬⑬⑬⑬

⑭⑭⑭⑭

③③③③②②②②①①①①

①

INPUT 1 (V, L/R ) terminal

②

INPUT 2 (V, L/R ) terminal

③

VARIABLE AUDIO OUT (L/R) terminal

④

Aerial socket (F-type connector)

① DISPLAY key ⑧ CH ANNEL ▲/▼ key
②

TV / VIDEO key

③

CLOSED CAPTION key

④

SLEEP TIMER key

⑤

VIDEO STATUS key

⑥

COLOR SYSTEM key

⑦ EXIT key ⑭ VOLUME -/+ key

⑨

POWER button

⑩

CHANN EL NUMBER key

⑪

HYPER SURROUND key

⑫

ME NU ▲/▼ key

⑬

MENU - / + key

④④④④

No.51917

5

A

V-T2922

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug the po wer plu g from AC ou tlet.

2. As shown in F ig. 1, remove t he 11 screws marked

screws marked "

Note:
When reinstalling the rear cover, carefully push it inward after

inserting the chassis into the rear c over groove.

".

""

!!!!

and 2

REMOVING THE CHASSIS

" After removing the rear cover.

1. Sli ght l y raise t he bot h si de s of th e chassis by hand and remove
th e 2 claw s under the b oth si d es of the chassis f rom the fr ont

cab inet .

2. Draw the c hassi s backwa rd al ong t he ch assi s rail in the ar row
direction marked #

(If necessary, remove t he wire clamp, connectors etc.)

Note:
When con ducting a c heck with p ower su pplied, be s ure t o conf irm

th at the CRT earth wire is certainly co nn ecte d.

# as s hown in the Fi g. 1.

##

CHECKING THE MAIN PW BOARD

To check the backside of t he MA IN PW Bo ard.

1) Pu ll out the chassis. ( Refer to REMOVING THE CHASSIS ).

2) Erect the chassis vertically so that you can easily check the
backside of the MAIN PW Board.

[CAUTION]

"

When erecting the chassis, be careful so that there will be no

con tact in g with ot her PW B .

" Before turning on power, make sure that the CRT earth wire

and oth er con nector s are prop erly conn ected.

WIRE CLAMPING AND CABLE T YING

1. Be sure to clamp the wire .

2. Never r emo ve the c able ti e used f or tying the wi re s togethe r.
Should it be inadvertently removed, be sure to tie the wires with a

new cable tie.

REMOVING THE SPEAKER

" After removing the rear cover and chassis.

1. As s hown in Fi g.1 , rem ove th e 4 screws marked $

2. Foll ow th e s ame st eps when rem oving the other hand spe aker.

$.

$$

6

No. 51917

A

2

FRONT CABINET

V-T292

CRT

SP EAKE R

D

CRT SOCKET PWB

(Within MAIN PWB)

MAIN PWB

FRONT CONTROL PWB

CLAW

SP EAKE R

REAR COVER

D

CLAW

C

B

A

POWER CORD

Fig. 1

No. 51917

7

A

V-T2922

SYS

S

O

G

S

CC

S

O

S

U

S

O

SOU

US

O

S

)

VIDEO

MEMORY IC REPLACEMENT

1. Memory IC

This model uses a memory IC.
The memory IC stores data for proper operation of video/chroma and deflection circuits.

When replacing, be sure to use the IC c ontai nin g initia l setting d ata .

2. Memory IC replacement procedure

PROCEDURE

(1) Power off

Switch off the p ower and disconnec t the power pl ug from t he out let.

(2) Replace the memory IC.

Be sur e to use th e m emory IC writt en with t he in itial set ting values.

(3) Power on

Connect the power plug t o the outlet and sw it ch on the po wer.

(4) System constant check and setting

It must not adjus t without signal.

1) Sim ul ta neo usly pr ess the DISPL AY key and VI DEO ST ATU S key
of th e rem ot e control unit.

2) The SERV ICE M EN U screen is d isp layed as sh own in Fig .1.

3) Whil e t he SERVICE MENU is disp layed , ag ain si multaneo usly
press the DISPLAY an d VI DE O ST ATU S keys to display t he

SY STEM CONSTAN T screen as shown i n Fig. 2.

4) Refer to th e S YSTEM C ON STANT t able and ch eck the s etting
items. W her e th ese diff er, select the sett in g ite m with t he MENU

▼▼▼▼

/

keys an d a dj ust the sett in g with t he MENU

(The le tters of t he s elect ed it em ar e displ a yed in ye llow.)

5) When adjust me nt has completed, pres s th e MENU ―――― / ＋＋＋＋ key to
store the setting value.

6) Press the EX IT key twic e to return to th e normal screen.

――――

/

＋＋＋＋

▲▲▲▲

keys.

ERVICE MEN

PICTURE

VID EO STA T

RF AFC CHK VCO (CW

I2C BUS CTRL

ELECT BY

PERATE BY

TEM CONSTANT

AM E : YE

D: YE

VID E

ELECT BY

PERATE BY

ND

THER

EX IT BY

Fig.1

: 2

EX IT BY

Fig.2

EXIT

EXIT

IT

IT

(5) Receiving channel setting

Refer to th e OPERATING INS TRUCTIONS (USER’S GUIDE) and
set the rece ive ch ann els ( Cha nn els Pr eset) as desc ribed.

(6) User setting s

Check th e user s etting items according to th e Table 2 given pag e
later.

Where thes e do n ot agree, refer t o the O PERATING
INSTRUCT IONS (USER’S GU ID E) an d s et t he it ems as desc rib ed.

(7) SERVIC E MENU s etti ng

Verif y what to s et in the SERVICE MENU, and set whatever is
necessary. (Fig.1) refer to the SERVICE ADJUSTMENT for setting.

8

DISPLAY

STATUS

EXIT

MENU

UP/DOWN

MENU

LEF T/RIGHT

No. 51917

A

2

VALUES OF SYSTEM CONSTANT (TABLE1)

Setting item Setting content Setting value

V-T292

GAME YES

HYPE R S CAN YES

SURROUND YES

CCD YES

VIDEO 2

YES NO

YES NO

YES NO

YES NO

210

VALUES OF USER SETTING ITEMS (TABLE2)

Setting item Setting value

Settings of switches on front panel and remote control unit

MAIN POWE R OFF
SUB P OWER ON
CHA N NE L CH 02
CHA NNEL PRESET Refe r to O PERATING INSTR UCTIONS
VOLUME 10
TV/V IDEO TV
DISPLA Y OFF
SLEEP TIME R 0
VIDEO STATUS ES TANDAR
CLOSED CAPTIO N NO (CC1/T1)
HYPER SURROUND NO

Settings of MENU screen

TINTE ESTANDER
COLOR ESTANDER
CONTRASTE ESTANDER
BRILLO ESTANDER
DETALLE ESTANDER
GRAVES CENTER
AGUDOS CEN TER
BALANCE CENTER
MTS ESTEREO
ALTAVOCES SI
AJU STE DEL RELOJ Unn ecess ary to set
TEMPORIZADOR NO
LIS TA DE CANAL ES Unnecess ar y to set
ADJUSTECÓ DIGO DE ACCES O Unnecessary to set
PROGRAMACI ÓN AUTOMÁTICA Unnecessary to set
MO DE TV
PANTALLA AZUL N O
SUBT ÍTULOS OCUILTOS SUBTÍTULOS : CC1 TEXT0 : T1
IDIOMA ES P.

No. 51917

9

A

V-T2922

REPLACEMENT OF CHIP COMPONENT

CAUTIONS

1. Avoid heating for more than 3 seconds.

2. D o n ot ru b the electrodes and t he resist p arts of th e patt ern.

3. W hen r em oving a chip part, melt th e solder ad equate ly.

4. D o n ot r euse a ch ip part after remo ving it .

SOLDERING IRON

1. U se a high ins ulatio n soldering iron with a thin pointed e nd of it .

2. A 30w s oldering iron is rec omm end ed for easil y removing parts.

REPLACEMENT STEPS

1. How to remove the Chip parts

Resi stors, ca pacitors , et c

(1) As shown in t he f ig ure, pu sh th e pa rt with tweezer s and

alternat ely melt th e solder at each end.

(2) Shift with tweeze rs and remove the ch ip part.

Trans isto rs, dio des, va riable r es ist or s, et c

(1) Apply e xtra so lder to ea ch le ad.

SOLDE R

SOLDE R

2. How to install Chip parts

Resi stors, ca pacitors , et c

(1) Apply sold er to th e pattern as indicated in the fig ure.

(2) Grasp the ch ip part with tweezer s and plac e it on the s ol d er.

The n hea t and melt the so ld er a t b oth ends of t he chip part.

Trans isto rs, dio des, va riable r es ist or s, et c

(1) Apply sold er to th e pattern as indicated in the fig ure.
(2) Grasp th e chip part wit h tweezers and p lace it on the so lder.

(3) First solder lead A as indicated in the figu re.

A

(2) As shown in t he f ig ure, pu sh th e pa rt with tweezer s and

alternat ely melt th e solder at each le ad. S hi ft and remove t he
chip part.

Note : A fter removing t he part, remove remain ing so lder fro m the

pattern.

10

C

(4) The n solder leads B and C.

A

C

No.51917

B

B

A

2

SERVICE ADJUSTMENT

BEFORE STARTING SERVICE ADJUSTMENT

1. There ar e 2 w ay of ad ju s ti ng t hi s TV: One i s wi th t h e
REMOTE CONTROL UNI T and the other is the conventional

method using adjustment parts and components.

2. The adjustment with the REMOTE CONTROL UNIT is made
on the b asis of the init ia l sett ing values. The setting va lues

which adjust the screen to its optimum condition may differ
from t he init ial setting v al ues.

3. Make s ur e th at conn ect ion is c orrect l y made t o AC power
source.

4. Turn on t he p ow er of th e se t and equipmen t bef or e use, an d
start the ad justmen t proc edures af ter wai ti n g at least 30 min utes.

5. U nless ot her wis e spec if i ed, pr ep ar e th e mo st suitable r ec epti o n
or inp ut signal for adjust ment.

6. N ev er touch a ny adjustme nt p art s, whi ch ar e not sp e cif ied
in the li st f or thi s adjust me nt VR s , transf or ms, condenser s,

etc.

7. Prep arati o n for adjustment
Unless otherwise specified in the adjustment instructions, preset

the following functions with the REMOTE CONTROL UNIT.

User menu preset value

VIDEO STATUS ESTANDAR

TINTE, COLOR, CONTRASTE,
BRILLO, DETAL LE

GRAVES, AUGD OS , BALANCE

HYPE R SURR OUND

V-T292

MENU ITEM PR ES ET VALUE

ESTANDAR

CENTER

NO

MEASURING INSTRUMENT AND FIXTURES

1. DC voltmeter (or digital voltmeter)

2. Oscilloscope

3. Si gn al gen erat or (P att ern g ener at or) [ PAL- M / PA L-N / NTSC]

4. Remote control unit

5. TV aud io multipl e x sign al generator

6. F requ enc y cou nte r

ADJUSTMENT ITEMS

BASIC ADJUSTMENT

! Check of B1 pow er supp l y
!

IF VCO adjustment

! FOCUS adjustment
!

RF AGC ad ju stment

DEFLECTION CIRCUI T ADJUSTMENT

!

V. HE IGHT

! V. POSI TION
!

V. LINEARITY

! V S CORRECTION
!

H. POSITION

VIDEO / CHROMA CIRCUIT ADJUSTMENT

! WHITE BA LANCE ～LOW LIGHT～
! WHITE BA LANCE ～HIGH L IGHT～

! SUB BRI GHT
!

SUB CONTRAST

! SUB COL OR
!

SUB TI NT

MTS CIRCUIT ADJUSTMENT

!

INPUT LEVEL

! STEREO VCO
! SAP VCO
!

FILTER

! SEPARATIO N

No. 51917

11

A

V-T2922

(

)

ADJUSTMENT LOCATIONS

FRONT

F 901

FRONT CONTROL PWB

TOP

CRT SOCKET PWB

(Wi thi n MAIN P WB)

++--

VO LU ME CH ANNEL

P

PW

POWER

SW

MAIN PWB

S

IC 702

MEMOR Y

P

T

MENU

TP-R

T

N

FRONT

N

IC 701

SOLDER SI DE

TP-E( )

U

E1

CR T EAR TH

(BRAIDED ASS'Y)

DEG

MPX

TUNER

T11 1

CW

1Pin : B1 (TP-91)
2Pin : NC

3Pin : T P-E ( )

HV

HVT

HVT

U

B1

13

HVTHVT

UPPER : FOCUS
LOWER : SCREEN

12

No. 51917

A

2

BASIC OPERATION SERVICE MENU

C C

)

1. TOOL OF SERVICE MENU OPE RATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

2. SE RVICE MENU ITEMS

With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of
adjustments.

(1) PICTURE ･･･････ ･････････ This mode adjusts the VIDEO / CHROMA and DEFLECTION circuits.
(2) SOUND ･･･････ ･･･････････ This m od e adjust s th e AUDIO circuits.

(3) VI DEO STA TUS ･･･････ ････This mode adjust s th e THEATE R an d G AME m ode.
(4) OTHERS･･･････ ･･････････ Thi s mod e adj ust s the OTHERS mode .

(5) LOW LIGHT･･･････ ･･･････ This mode adjust s th e whit e balan ce (low light) mode.
(6) HIGH LIGHT･･･････ ･･･････ This m od e adjust s th e whit e b alance ( high lig ht) m ode.
(7) RF AFC CHK

(8) VCO(C W) ････････････････ This mode adjusts the IF VCO mode.
(9) I2C BUS CTRL

･･･････ ･･････

･･･････ ･････

This mode adjusts the IF VCO mode. [Do not adjust]

This mode is u sed whe n necessary to ad just the on/off of the I2C bus control. [Do not adjust. Fixed on]

V-T292

3. BASIC OPERATION OF SERVICE MENU
(1) Ho w to enter SERVICE MENU

Press the DI SPLAY key and the VI DE O S TAT U S key of the

REMOTE C ON TROL UNIT simu lt an eou sly, an d the
SERVICE MENU screen will be displayed (Fig.1).

(2) Selection of SUB MENU SCREEN

In SERVICE MENU, pr ess th e MENU ▲▲▲▲ /▼▼▼▼ key to select
any of the fo llowin g item s. (The le tters of the select ed ite ms

are displayed in yell o w)

●PICTURE ●SOUND

●VIDEO STA TUS ●OTHERS

●LOW LIGHT ●HIGH LIGHT

●RF AFC CHK ●VCO(CW )

2

●I

C BUS CTRL

SE RVICE M ENU

SERVICE MENU

PIC TURE SOUN D
VID EO STATUS O THERS
LOW LIGHT HIGH LIGHT

HK VCO (CW

RF AF
I2C BUS CTRL

SELECT BY
O PERAT E BY

Fig.1

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

DISPLAY

VIDEO

STATUS

EXIT

EXIT BY

EX IT

IT

MENU

UP/DOWN

MENU

LEF T/RIGHT

No. 51917

13

A

V-T2922

A

CU

(3) Method of Setting

1) MENU ▲▲▲▲ / ▼▼▼▼ key
Se lect t he se tting ite m.

2) MENU ―――― / ＋＋＋＋ key
Se tti ng the set ting valu e of th e set ting item.
When ch ange the v a lues, automatic ally stored in the memory.

3) EX IT key

Return t o th e pr evious screen.

NOTE

In PICTURE MODE, hhile the color of letters displayed yellow, you can
adjust the values. If letters displayed red, you cannot adjust.

(4) Release of SERVICE MENU

After co mpleting t he adjustment, return to the main SERVI CE MENU by
pressin g the EXIT key. Th en ag ain p r ess the EXIT key, retur n to t he normal
screen.

Select it em

1. PI CT URE

**** ****

**** ****

**** ******** ****

SELECT BY
OPERAT E B Y

1. NOI SE

STANTUS

STANTUS

STANTUSSTANTUS

SELECT BY
OPERAT E B Y

djustment value

PICTURE MODE

***

***

******

****

****

********

EXIT BY

EX IT

***

***

******

****

****

********

EXIT BY

EX IT

IT

IT

The letter of the selected
Items are displayed in yellow.

TINT G DRI V E
COLO R B DRIVE

PIC TURE R CUT.
BRI GHT G CUT.
DETA IL B CUT.

SELECT BY
OPERAT E B Y

THEATER

***

***

******
***

***

******
***

***

******
***

***

******
***

***

******

***

***

******
***

***

******
***

***

******
***

***

******
***

***

******

EXIT BY

EX IT

IT

Press

VIDEO

STA TUS

VIDEO STA TUS MODE

Key

SOUND MODE

1. OSD POS.

**** ****

**** ******** ****

SELECT BY
OPERAT E B Y

OTHERS MODE

TINT G DRI V E
COLO R B DRIVE
PIC TURE R CUT.
BRI GHT G CUT.
DETA IL B

SELECT BY
OPERAT E B Y

***

***

******
***

***

******
***

***

******
***

***

******
***

***

******

GAME

T.

***

***

******

****

******** ****

********

EXIT BY

EX IT

***

***

******
***

***

******
***

***

******
***

***

******
***

***

******

EXIT BY

EX IT

IT

IT

14

No. 51917

A

V-T292

2

SERVICE MENU (MAIN MENU)

SE RV ICE M EN U

PICTURE SOUND
VIDEO STATUS OTHERS

LOW L IGH T HIGH LI GHT

RF AFC CHK VCO (CW)

I2C BUS CTRL

SE LEC T BY
OPERATE BY

EX IT BY

EXIT

IT

HIG H LIGHT MOD E

HIGH LIGHT

** *

** *

** *** *

** *

** *

** *** *

EX IT BY

EXIT

IT

RF AFC CHK MODE [D O NOT ADJ UST]

SE LEC T BY

EX IT BY

EXIT

PICTURE MODE

1. PICTURE

** ** *** *

** ** *** *

** ** *** *** ** *** *

IT

SE LEC T BY
OPERATE BY

** **

** **

** **** **

EX IT BY

EXIT

** *

** *

** *** *

IT

OTHERS MODE

** *

1.OS D POS.

** ** *** *

** ** *** *

** ** *** *** ** *** *

SE LEC T BY
OPERATE BY

** **

** **

** **** **

EX IT BY

EXIT

** *

** *** *

IT

SOU ND MOD E

RF AFC
FINE

STATUS

SE LEC T BY
OPERATE BY

** *** ***

** *** ***

** *** ***** *** ***
** *** ***

** *** ***

** *** ***** *** ***

EX IT BY

VOC (CW) M ODE

V CO ( CW )

TOO HIGH

ABOVE REFERENCE
BELOW REFERENCE

TOO LOW

SY NC : YE S

EX IT BY

I2C BU S CTRL MO DE [FIXED ON ]

I 2C B US O N

OPERATE BY

EX IT BY

** *

** *

** *** *

EXIT

EXIT

EXIT

ON

1. NOISE

STATUS

IT

SE LEC T BY
OPERATE BY

** *

** *

** *** *

** *** ***

** *** ***

** *** ***** *** ***

EX IT BY

EXIT

IT

VID EO STATUS MODE

THEATER

** *

TINT G DRIVE

COLOR B DRIVE
PICTURE R CUT.

BRIGHT G CUT.

DETAIL B CUT.

IT

SE LEC T BY
OPERATE BY

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *

** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *

EX IT BY

EXIT

TINT G DRIVE

COLOR B DRIVE
PICTURE R CUT.

Press

VID EO

STATUS

IT

Ke y

BRIGHT G CUT.

DETAIL B CUT.

SE LEC T BY
OPERATE BY

** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *

GAME

** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *
** *

** *

** *** *

EX IT BY

EXIT

IT

LOW LIGHT MODE

** *

BRIG H T

IT

BRIGHT

** *

** *** *

** * *** * **

** * *** * **

** * *** * **** * *** * **

EX IT BY

EXIT

IT

No. 51917

15

A

V-T2922

INITIAL SETTING VALUE OF SERVICE MENU

1. Ad justment of the SE RVICE MENU is ma de on the ba sis of the initial setting v alue s. Howev er, t he new s ett ing values which set the
screen in its optimum condition may differ from the initial setting.

2. Do not change the in itial sett ing values of t he a djustment ite ms not list ed in “ADJU STM ENT” page s.

PICTURE MODE

The four s etting items in the video mode No.8 EX T PIC., No .9 EXT BRI., No.10 EXT COL., and No.11 EX IT TINT are linked to the items in t he
TV MODE No.1 PICTURE, No.2 BRIG HT, No.5 COL.NTSC and No.6 TINT, resp ectively. When the sett ing items in the TV mo de are adjusted,

th e values in th e setting items i n t he video mode are revis ed au tomat ic all y to th e same va lues in th e TV mode .( The initia l sett ing val ues given
in ( ) a re off -set valu es. )

When th e f our ite ms (No. 8, 9, 1 0 a nd 11) are ad juste d in t he video mode, the setting valu es in each item are revise d in dep en de ntly.

No . Setting (Adjustment) item Variable range Initial setting val ue

1. PICTURE 0～127 60

2. BRIGHT 0～127 64

3. COL. PALM 0～127 80

4. COL. PA LN 0～127 80

5. COL. N TSC 0～127 95

6. TINT 0～127 65

7. TV DTL 0～63 33

8. EXT PI C. ±25 (0)

9. EXT BRI. ±25 (0)

10. EXT CO L. ±25 (+4)

11. EXT T INT

12. EXT DTL 0～63 30

13. P/N K ILL 0 / 1 0

14. Y S CONT 0～31 31

15. TV Y- DL 0～41

16. EXT Y-DL 0～41

17. WPL SW 0 / 1 0

18. Y GAMMA 0 / 1 0

19. P/N G P. 0 / 1 0

20. COL. L SW 0 / 1 1

21. COL. LMT. 0～31

22. PN C. ATT 0～31

23. OFST. SW 0 / 1 0

24. OFST. B-Y 0～15 8

25. OFST. R-Y 0～15 8

26. C-TOF SW 0 / 1 1

27. TV T FO 0～31

28. TV T Q 0～30

29. EXT T FO 0～30

30. EXT T Q 0～30

31. C-TRAP 0 / 1 0

32. C-TR . FO 0～32

33. C-TRAP Q 0～31

34. FIX B/W 0 / 1 0

35. AP A P. FO 0～32

36. DC TRAN. 0～74

37. B. ST. SW 0 / 1 0

38. B. ST. PO. 0～70

39. AB L GA IN 0～74

40. AB L PO. 0～70

41. HALF T.

42. DRV G S W 0 / 1 0

43. NT. COMB 0 / 1 1

44. COIN DET 0～33

45. NOISE L.

46. VCD MODE 0 / 1 0

47. V AGC S P 0 / 1 0

48. H POS . 50 0～31 6

49. H BL K. 50

50. V POS. 50 0～72

±25

0～2

0～3

0～7

(+3)

1

3

0

16

No. 51917

A

2

PICTURE MODE

G

No . Setting (Adjustment) item Variable range Initial setting val ue

51. V SIZE50 0～127 71

52. V S CR50 0～127 83

53. V LIN. 50 0～31 4

54. H POS. 60 0～31 10

55. H BL K. 60 0～70

56. V POS. 60 0～70

57. V SIZE60 0～127 72

58. V S CR60 0～127 99

59. V LIN. 60 0～31 3

60. RF AGC 0～255 160

SOUND MODE

No . Setting (Adjustment) item Variable range Initial setting val ue

1. NOISE 0 / 1 1

2. IN LE VEL 0～63 50

3. FH MON . 0 / 1 0

4. ST VCO 0～63 25

5. PILOT 0 / 1 0

6. FILTER 0～63 30

7. LOW SEP. 0～63 22

8. HI SEP. 0～63 23

9. 5FH M ON. 0 / 1 0

10. SA P VCO 0～63 26

11. IN GAIN 0 / 1 0

12. FIL. OFF. 0～10 0

V-T292

VI DEO STA TUS MODE

Setting (Adjustment) item Variable range

TINT ±20 0 0
COLOR

PICTURE -30～+20 -10 -10
BRIGHT

DETAIL ±15 0 -5
G DRIVE -99～+50 -22 0

B DR IVE -99～+50 -54 0
R CUT.

G CUT. ±10 0 0
B CUT.

Initial set ting v alue

THEATER

±

20 -3 -3

±

20 0 0

±

10 0 0

±

10 0 0

AME

No. 51917

17

A

V-T2922

OTHERS MODE

No . Setting (Adjustment) item Variable range Initial setting val ue

1. OSD P OS. 0～31 7

2. LO CK DET 0 / 1 0

3. SD SE L. 0～20

4. H-CK SW 0 / 1 0

LOW LIGHT MODE

Setting ( Adj ustment) item Variabl e range Initial setting val ue

R CUTOFF 0～255 20
G CUTOFF 0～255 20

B CUTOFF 0～255 20

HIGH LIGHT MODE

Setting ( Adj ustment) item Variabl e range Initial setting val ue

G DRIVE 0～255 128
B DR IVE 0～255 128

RF AFC CHK MODE

Setting ( Adj ustment) item Variabl e range Initial setting val ue

RF AFC ON / OFF ON
FINE -77～+77 ±××

I2C BUS CTRL MODE

Setting ( Adj ustment) item Variabl e range Initial setting val ue

I2C BUS ON / OFF [Fi xed ON ]

DO N OT
AD JUST

18

No. 51917

A

2

ADJUSTMENTS

)

)

BASIC ADJUSTMENT

Item

Check o f
B1 POWER
SUPP LY

Measuring

instrume nt

DC Voltmet er TP- 91

Test point Ad justment item Description

(B1 connector

1 p i n)

TP-E(#)

(B1 connector

3 pi n )

1. R eceive a black an d white si g nal (colo r off ). (NTSC)

2. C on nect the DC vo lt me ter to B 1 c onnector 1 pin ( TP-91) and
TP-E(#) (B 1 connect or 3 pin).

3. C onf ir m th at the vol ta ge is DC129.5 V V .

+2

-2.5

V-T292

IF VCO
adjus tment

Signal
generator

Remote
control unit

VCO (CW

TOO HIGH

TOO LOW

EX IT BY

EXIT

CW TRANSF. (T111

VCO (CW) mode

YE LLOW

IT

"

Under normal conditions, no adjustment is required. And it must

not a djust wit hout signal.

1. R eceive th e NTSC b roadc ast.

2. Select t he VCO(CW ) mode from the SER V IC E M EN U.

3. It c hecks that turn the CW TRANSF and the character of “TOO
HIGH” changes to yellow.

4. N ext, it chec ks th at tu rn the CW TRAN SF on th e cont rary and
“TOO LOW” ch anges to yellow.

5. At this time, it checks that “SYNC” is “YES” .

6. Turn the CW TR ANSF and it is made f or th e c h aract er of
“BELOW REFERENCE” to become yellow. Again, it checks

that “SYNC” is “YES”.

FOCUS
adjus tment

Signal
generator

FOCUS VR
[In HVT]

No. 51917

1. Receive a crosshatch signal.

2. W hile looking at th e sc re en, adj u st FOCUS VR so th at the
vertical and horizontal lines will be clear and fine in a detail.

3. M ake sur e t hat th e pict ur e is i n f ocus even w he n t he screen
gets darken ed.

19

A

V-T2922

Item

RF AGC

Ad j ust men t

Measuring

instrume nt

Remote
control unit

Test point Adjustment part Description

No .60 R F AG C 1. R eceive an y bro adcast..

2. Select “No.60 RF AGC” of the PICTURE MODE in SERVICE
ME NU.

3. Pr ess the MUTING key an d tur n off t he colo r.

4. Wi th th e MENU ―――― key, g et noise in t he screen picture. (Zer o
si de of sett in g value)

5. Pr ess the MENU ＋＋＋＋ key and stop when noise d is app ea rs fr o m
th e scre en.

6. Change t o oth er chann els and ma ke sur e th at th ere is no
irregularity.

7. Pr ess the MUTING key and get color out.

Setting It e m Variabl e range Init ial set ting v alue

No .60 R F AG C

0～255

160

20

No. 51917

A

2

DEFLECTION CIRCUIT ADJ USTMENT

The setting (adjustment) using the remote control unit is made on the basis of the initial setting v alues.

The setting values which adj ust the screen to the optimum condition can be different from the initial setting val ues.

V-T292

Item

60 Hz

PAL -M or

NT SC signal

adjus tment

V. HE IGHT
V. POSI TION

V. LIN
V. S CR
adjus tment

Screen

size

92%

Measuring

instrume nt

Signal
generator

Remote
control unit

Picture size 100%

Test point Ad justment part Description

No .56 V POS. 60
No .57 V S IZE 60

No .58 V S CR60
No.59 V. LIN. 60

Screen size

Picture
size

100%

1. Receive a crosshatch signal.(NTSC or PAL-M)

2. Conf irm t ha t the va lu e of PICTURE MODE “No. 56 V PO S. 60”
is 0.

3. Conf irm th e initia l sett ing value of the “No.57 V SI ZE 6 0”, No. 58
V S CR60” an d “No. 59 V L IN. 60” .

4. Ad ju st t he vertical screen s ize to 92 % with the PICTURE
MODE “No. 57 V SIZE60”.

5. Ad ju st t he PI CTURE MODE “No. 59 V LIN. 60” and “No.58 V S
CR60” to get the best vertical linearity.

NOTE :

"

The PICTURE MODE “No.56 V POS. 60” is fixed on value 0.

"

Bottom of scr een is t o be located within the 85%～95% range.

ADJU STM ENT ITEM INITIAL SETTING VALUE

No .56 V POS. 60 00(Fixed on)

No .57 V S IZE 60 72

No .58 V S C R 60 99

No.59 V. LIN . 60 03

50 Hz

PAL-N signal

adjus tment

V. HE IGHT
V. POSI TION

V. LIN
V. S CR
adjus tment

Signal
generator

Remote
control unit

No .50 V POS. 50
No .51 V S IZE 50

No .52 V S CR50
No .53 V LI N. 50

1. Recei ve a cr oss hat ch sig na l. (P AL -N)

2. Conf irm the ini ti al s ettin g valu e of the “No.5 0 V POS. 50”,
“No.51 V SI ZE 50 ” , “ No. 52 V S C R 50” and “No. 53 V LIN.50 ”.

3. Adjust the vertical screen size to 92% with the PICTURE
MODE “No. 51 V SIZE50”.

4. Ad ju st th e PICT URE MODE “No. 53 V LIN.50 ” and “No.52 V S
CR50” to get the best vertical linearity.

5. Ad ju st t he PICTURE MODE “No. 50 V POS .50 ” s o t ha t the
ver ti cal center c omes clos e to the CRT vertical ce nter as much

as possib le.

6. Readjust V SIZE, V LIN . and V S CR if ne cess ary.

NOTE :

"

Bottom of screen is t o be located within th e 85%～95% range.

ADJU STM ENT ITEM INITIAL SETTING VALUE

No .50 V POS. 50 02

No .51 V S IZE 50 71

No .52 V S C R 50 83

No.53 V. LIN . 50 04

No. 51917

21

A

V-T2922

Item

60 Hz

PAL -M or

NT SC signal

adjus tment

H. P OS ITIO N
adjus tment

Measuring

instrume nt

Signal
generator

Remote
control unit

HH"

Test point Adjustment part Description

No .54 H POS .60 1. Receive a crosshatch sign al. ( NTSC or PAL- M)

2. Se lect the “No. 54 H P OS. 60” of th e PI CTURE mod e in
SERVICE MENU.

3. C onf ir m th e initial sett in g value of the "No. 54 H PO S. 6 0".

4. Ad ju st th e “No. 54 H P OS. 60” unt il the screen will be
horizont ally c entered.

ADJU STM ENT ITEM INITIAL SE TTING VALUE

No .54 H POS . 6 0 10

50 Hz

PAL-N signal

adjus tment

H. P OS ITIO N
adjus tment

Signal
generator

Remote
control unit

No .48 H POS .50 1. Receive a crosshatch signal. (PAL-N)

2. Se lect the “No. 48 H P OS. 50” of th e PI CTURE mod e in
SERVICE MENU.

3. C onf ir m th e initial sett in g value of the "No. 48 H PO S. 5 0".

4. Ad ju st th e “No. 48 H P OS. 50” unt il the screen will be
horizont ally c entered.

ADJU STM ENT ITEM INITIAL SE TTING VALUE

No .48 H POS . 5 0 06

22

No. 51917

A

2

VIDEO / CHROMA CIR CUIT ADJUSTMENT

The adjustment usi ng the remote control unit is made on the basis of the initial setting values.

The setting values which adj ust the screen to the optimum condition can be different from the initial setting val ues.

Do no t c hang e the initial se tting values of t he setting it ems not listed in “A DJUSTMENT”.

V-T292

Item

WHITE
BALANCE
(Low Light)
adjus tment

R CUTOFF

Measuring

instrume nt

Signal
generator

Remote
control unit

LOW LIGHT MODE

BRIGHT

*** *** ***

*** *** ***

*** *** ****** *** ***

BRI GHT

Test point Ad justment item Description

BR IG HT

1. Receive a black-and-whi t e sign al.( Color off)

2. Select t he LOW LIGHT MODE from the SERVI CE ME NU.

R CUTOFF
G CUTOFF
B CUTOFF

3. Se t the ini ti a l se tting valu e of BRIG HT w it h th e MENU ―――― / ＋＋＋＋
key of the remote control unit.

4. Se t the init ial sett in g value of R CUTO FF, G CUT OFF an d B

SCREEN VR

CUT OFF with the ④④④④ to ⑨⑨⑨⑨ key of the remote control unit.

5. Disp lay a sing le horizont al line by p r essing th e ①①①① key of the
remote control unit.

6. Tur n t he scr een VR a ll the way t o the left.

7. Turn t he screen VR gradually to th e r ight f rom the left un ti l
either one of the r ed, bl u e or g reen co lors appea rs f aintly.

8. Use ke ys ④～⑨ of the remote control un it and adjus t the
oth er 2 colors whi ch except th e appeared c ol or to w h er e the

G CUT OF F

si ng le horiz ont al line appea rs white.

9. Turn the screen VR to where the sing le hor i zontal li ne gl o ws

BRIGHT

faintly.

10 . Press the ②②②② key t o r eleas e the single horizont al line.

***

***

******

EXIT BY

EX IT

B C U TO FF

IT

11. Ad just th e BRIGHT level to bec om e the black co mponent
shines white slightly.

12. Conf irm th at whet her the color ing redient of R , G or B is vi sibl e
to th e bl ack component which sh ines white slig htl y.

13. When th e c olor ingredien t can be seen, tw o color s oth er th an a
visible color are adjusted, and it is made to look white.

14 . Return th e value of BRIGHT to initial setting value.
15 . Press the EX IT key to exit th e WHITE BALANCE MODE.

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

SIN GLE LINE ON

123

SIN GLE LINE OFF

9

G .CU TO FF ( )

B. CUT OFF( )

B. CUT OFF( )
B. DRI VE(

R. CU TOF F( )

R. DR IVE ( )

R. CU TOF F( )

R. DR IVE (

△
△△

4

7

△
△

)

R

56

8

GB

△

B. DRI VE( )

G .CU TO FF ( )

△

△

△

)

△

No. 51917

C UT O FF ADJ USTM E NT

R
G

B0

Variabl e

range

0 ～255
0 ～255

～

255 20

Initial set ting

value

20
20

23

A

V-T2922

Item

WHITE
BALANCE

(High Light)
adjus tment

SUB BRI GHT
adjus tment

Measuring

instrume nt

Signal
Gene rator

Remote
control unit

HIGH LIGHT MODE

Remote
control unit

Test point Ad justment item Description

G DRIVE
B DR I VE

1. R eceive th e NTSC b lack a nd white s ig nal (c olor of f) .

2. Select t he HI GH LIG HT mode in the SER VI CE ME NU.

3. Confirm the initial setting value of “G DRIVE” and “B DRIVE”.

4. Ad ju st t he scr e en color to wh it e w it h t he ⑤⑤⑤⑤ , ⑥⑥⑥⑥, ⑧⑧⑧⑧ and ⑨⑨⑨⑨
keys of the remote control unit.

B DRIVEG DRIVE

HIGH LIGHT

***

*** ***

******

***

******

EXIT BY

EX IT

IT

DR I VE AD J USTM E NT

G

B

No.2 BRIG HT 1. Receive a N TSC broadca st.

2. Se le ct “No.2 BRIGHT” of th e PI CTURE mode in SERVICE
ME NU.

3. C onf ir m th e initial sett in g value of the “No.2 B RI GH T” .

4. If the brightness is no t th e best with the initial settin g value ,
make f in e adj us tment of the “No. 2 B RI GH T” until you g et the

optimum bri ght ness .

Variabl e

range

0 ～ 25 5

0 ～ 25 5

Initial set ting

value

128

128

SUB
CONT RAST
adjus tment

Remote
control unit

BR IG HT A DJ US T M ENT

No.2 BRIGHT

No .1 P I C T UR E 1. Receive a NTSC br oa dcast.

2. Se le ct “No. 1 PICTURE ” of the PICT URE m od e in S ER VICE
ME NU.

3. C onf ir m th e initial sett in g value of the “No.1 P IC TURE” .

4. If the contr ast is not the best with the initial sett ing value, make
fine adjustm ent of t he “No. 1 PICTURE” un ti l you ge t th e

optimum contrast.

PICTURE

ADJUSTMENT

No.1 PICTURE

Variabl e

range

0 ～ 12 7

Variabl e

range

0 ～ 12 7

Initial set ting

value

64

Initial set ting

value

60

24

No. 51917

A

V-T292

2

Item

SUB COLOR
adjus tment

Measuring

instrume nt

Remote
control unit No .3 COL . PALM

Test point Ad justment item Description

No.4 COL . PALN

No .5 COL . NT SC

[PAL-M]

1. R eceive a PA L- M broa dcast.

2. Select “No. 3 COL . PALM” of th e P ICT URE mod e i n SER VICE
ME NU.

3. C onf ir m th e initial sett in g value of the “No.3 COL. PALM” .

4. If the color is not the best with the initial setting value, make
fine adjustment until you get the best color.

[PAL-N]

1. R eceive a PA L- N broadc ast.

2. Select “No. 4 CO L. PA LN” of th e PIC TURE mo de in SE RVIC E
ME NU.

3. C onf ir m th e initial sett in g value of the “No.4 COL. PA LN”.

4. If the color is not the best with the initial setting value, make
fine adjustment until you get the best color.

[NTSC]

1. R eceive a NTSC br oa dcast.

2. Select “No. 5 COL . N TSC” of th e P ICT URE mod e in SERVICE
ME NU.

3. C onf ir m th e initial sett in g value of the “No.5 COL. NTSC”.

4. If the color is not the best with the initial setting value, make
fine adjustment until you get the best color.

SUB TINT
adjus tment

Remote
control unit

COLOR ADJUSTMENT

No.3 COL. PAL-M

No.4 COL. PAL-N 0 ～ 127 80

No.5 COL. NTSC

No . 6 TINT 1. Receive a NTS C color bar sig nal.

2. Select “No. 6 TINT” of the PICTURE mode in SERVICE
ME NU.

3. C onf ir m th e initial sett in g value of the “No. 6 TI NT”.

4. If the tin t is not th e best with the initial se tting value, make fine
adjustment until you get the best tint.

TINT ADJUSTMENT

No.6 TINT

Variabl e

range

0 ～ 12 7

0 ～ 12 7

Variabl e

range

0 ～ 12 7

Initial set ting

value

80

95

Initial set ting

value

65

No. 51917

25

A

V-T2922

[

]

[

]

[

]

[

]

cycle

MTS CIRCUIT ADJUSTMENT

Item

MTS INPUT
LEVE L
che ck

MTS
STEREO VCO
adjus tment

Measuring

instrume nt

Remote
control unit

Signal
generator

Frequency
counter

Remote
control unit

R OUT

Test point Ad justment part Description

No.2 IN LE VEL 1. Se le ct t he “ No.2 IN LEVEL” of th e SOUND mode in SERVICE

ME NU.

2. Verify that the “No.2 IN LEVEL” is set at its initial setting
value.

AUDIO OUT

No.3 FH MON
No.4 ST VCO

1. R eceive a NTSC R F sign al (non modula ted sou nd sign al) from
th e a nte nna t ermin al.

2. Select the “No.3 FH MON” of SOUND mode in SERVICE
MENU, cha nge the setting va lue from 0 to 1.

3. Connect th e fr eq uen cy connect or t o R O UT RCA pi n of the
AUDIO OUT.

4. Select t he “ No.4 ST VCO”.

5. C onf ir m th e initial sett in g value of the “No.4 S T VCO”.

6. Adjust t he “No.4 ST VCO ” so that t he freq uency co un ter wil l
display 15.73kHz±0.1 kHz.

7. Select t he “ No.3 FH MON” of the SOUND m od e, and reset the
set ting value from 1 to 0.

MTS SAP
VCO

adjus tment

MTS FILTER
che ck

MTS
SE PAR ATIO N
adjus tment

-

Signal
generator

Frequency
counter

Remote
control unit

Remote
control unit

TV audio
Multiplex
signal
generator

Oscillo scope

Remote
control unit

MPX

Connector

4 pi n SDA

3 pi n GN D

MAIN PW B

R OUT

AUDIO OUT

L OUT
R OUT

AUDIO OUT

No .9 5 F H M ON.
No .10 SAP VCO.

No .6 FILTER

No.7 LOW S EP.
No.8 HI S EP.

-

1. R eceive a NTSC R F sign al (non modula ted sou nd sign al) from
th e a nte nna t ermin al.

2. C on nect b et we en pi n 4 of MP X co nn ector and GND (pin 3 of
MPX co nnecto r) t hr ou gh 1M Ω resistor.

3. Select t he “ No.9 5 FH MON.” of the S OU ND mode in SERV ICE
MENU, and r eset t he s ett ing value from 0 to 1.

4. Connect th e fr eq uen cy connect or t o R O UT RCA pi n of the
AUDIO OUT.

5. Se lect t he “No.1 0 SAP VCO ”.

6. C onf ir m th e initial sett in g value of “N o. 10 SAP VCO”.

7. Adjust th e “No.10 SAP VC O” so that the frequenc y c onn ect or
will display 78.67kHz±0. 5kHz.

8. Select the “No.9 5FH MON.” of the SOUND mode, and reset
the setting value from 1 t o 0.

1. Select the “No.6 FLTER” of the SOUND mode in SERVICE
ME NU.

2. Verify that the “No.6 FLTER” is set at its initial setting value.

1. Input a stereo L signal (300Hz) from the TV Audio multiplex
si gn al gene rator t o the antenna ter minal. (N TSC)

2. Connect an oscillosc op e to L O UT R CA pin of th e A UDI O
OUT, and display one cycle portion of the 300Hz signal.

3. C ha nge t he con n ection of t he os cillosc ope t o R O UT RCA pin
of th e AUDIO O UT, and enlarge th e volt age axis.

4. Se lect t he “No.7 LOW SE P.” of th e SO UND mode in SERVICE
ME NU.

5. C onf ir m th e initial sett in g value of the “No.7 LOW SE P.”.

6. Adjust the “No. 7 LOW SEP .” so th at th e stroke el e me nt of t he
300Hz signal will become minimum.

7. C ha nge the sig nal t o 3 kHz, an d s imil arly ad just t he “ No.8 HI
SEP.”.

Mi nimum

1

26

No. 51917

A

2

PURITY, CONVERGENCE

PURITY ADJUSTMENT

1. Demag netize CRT with t he dema gn eti zer.

V-T292

2. Loose n the re tain er screw of th e deflec tion yoke.

3. Remove th e wedges.

4. Input a g reen r ast er sign al fr om the signal ge ner at or, an d tur n
th e scre en t o gr een raster.

5. Move the deflection yoke backward.

6. Br i ng t he long lug of th e p ur ity magn ets on the short lug a nd
posit ion t he m hor izon tally. (Fig. 2)

7. Ad just t he gap be tween t wo lug s s o th at the G RE EN RAS TER
will come into the center of the screen. (Fig.3)

8. Move the deflect ion yoke for ward, a nd fi x th e pos itio n of th e
deflection yoke so that the whole screen will become green.

9. Ins ert the wedge t o th e top side of the deflect io n yoke so th at it
will not move.

CR T

WEDGE

#

P/ C MA GNETS

DEFLECTION

YOKE

P

46

P / C

MAGNET S

P : PURITY MAGNE T
4 : 4 P OLES (con vergence m agn ets)
6 : 6 P OLES (con vergence m agn ets)

Fig. 1

PURITY MAG NETS

10. Inp ut a cr oss hat ch sig nal.

11. Ve rif y that the scr e en is hor i zon tal.

12. Inp ut red and blue rast er sign al s, a nd make su re tha t pur i ty is
properly adjuste d.

Long lug

Short lug

(FRO NT VIEW )

Bring the long lug over the short lug
and position them horizontally.

Fig. 2

GREEN RASTER

CEN TER

Fig. 3

No.51917

27

A

V-T2922

STAT IC CONVERGENCE ADJUST MENT

1. Inp ut a cross hatch signal.

2. U sing 4 - po le conver ge nce magnets , ove rla p t he red and blue
lines in the cen ter of th e screen ( Fig. 1) a nd tu rn the m to

magent a (red/ blue).

3. U sing 6- p ol e conver ge nce magnets, ove r lap th e m age nta
(red/blue) an d green li nes in t he cent er of the screen and tu rn

them to white.

4. Repeat 2 and 3 ab ove, an d ma ke best c onver ge nce.

DYNAMIC CONVERGENCE ADJU STMENT

1. M ove th e d ef lec ti on yok e u p an d d own and o ver l ap th e lines in
the peripher y. (Fig. 2 )

2. Move th e deflection yoke left to ri gh t a nd overlap t he lines in the
perip her y. (Fi g. 3)

3. Repeat 1 and 2 ab ove, an d ma ke best c onver ge nce.

(FRO NT VIEW )

(FRO NT VIEW )

BLUE

GREEN

RED

Fig.1

GREEN

BLUERED

RED

GREEN

BLUE

●

After adjustment, f ix the wedge at the original p osition.

Fast en t he r etain er screw of th e def lection yoke.
Fi x the 6 magn ets with glue.

[Adjustment for the models equipped with

di ff erential co il.]

If the lin es are n ot al igne d, as sh own in Fig . 4 , correct them with th e
diff erent ial co il attached t o the deflectio n yoke.

(FRO NT VIEW )

B(R)

G

R(B)

(FRO NT VIEW )

GREEN

RED

BLUE

GREEN REDBLUE

Fig.2

Fig.3

GREEN

BLUE RED

RED
GREEN

BLUE

BLUE
GREEN

RED

Fig.4

28

No.51917

A

2

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT

Q9

3

8

Q5

3

Q5

Q5

cc

C5613

1. HIGH VOLT AGE HOLD DOWN CIRCUIT

Af ter r ep airin g the high voltage h old down c ircuit as sh own in Fi g. 1 .
Thi s circuit shall be checked to op erat e correct ly.

2. CHECKING OF THE HIGH VOLTAGE HOLD DOWN CI RCUIT

(1) Turn the power switch on.
(2) As s hown in F ig.2 , s et the res is tor (b etween X connect or 1 & 3 ).

(3) M ake sur e t hat the screen pic tur e disap pear s.
(4) Temporarily unplug the power plug.

(5) R em ove th e resi stor (bet ween X con nec tor 1 & 3 ).
(6) Again plug th e pow er plug, ma ke su re th at the normal picture is display ed on the scree n.

B1

V-T292

42

IC701

1 4

H-V

­4

21

2 1

R562

D562

11

Fig. 1

RE SIS TOR

RE SIS TOR

RE SIS TORRE SIS TOR

14 .2kΩ±1% 1/4 W

14 .2kΩ±1% 1/4 W

14 .2kΩ±1% 1/4 W14 .2kΩ±1% 1/4 W

T521

FR561

22

HEATER

2 1 X

FR561 D561

Fig. 2

No. 51917

29

A

V-T2922

g

SELF CHECK FUNCTIONS

1. Outline

Thi s mod el has self ch eck fu nctio ns given below. When a malfunctio n h as b een d etec ted, t he SU B- POWER is turned off an d t he LED
flash es t o inf orm of the failu re. The malfunction is d etected by th e sign al input stat e of the con trol line c onn ect ed t o the microc om puter .

2. Se lf check i t ems

Check it em D et ec te d con tent s Detection met hod Ab norma lity stat e

Over- current prot ecto r Op eration of over-cu rrent

protection circuit

X-ray protect or Op eration o f X- r ay prot ectio n

circuit

CRT NECK prot ecto r When th e ver ti cal circuit S-

cor rection c apac it or C413 is
sh ort ed, d et ect the poten tial

drop of t he C4 13 , an d preven t
th e bu rn da ma ge t o th e CRT

NECK.

The micr ocomputer dete cts at 1
second intervals.

If NG is detected f or more th an 1
ms , a malf un ction is interpreted.

The micr ocomputer dete cts at 1
second intervals.

If NG is detected f or more th an 1
ms , a malf un ction is interpreted

The micr ocomputer dete cts at 1
second intervals.

If NG is detected f or more th an 1
ms , a malf un ction is interpreted

Duri ng an abnor mality th e sub­power is cutoff. The remote
controller power key operation is

not reco gni zed and sub -power
off is maintained until the power

cor d is unpl ug ged and
reinsert ed.

Duri ng an abn or m ality the su b­power is cutoff. The remote

controller power key operation is
not re cognized a nd s ub-power

off is maintained until the power
cor d is un pl ug ge d an d

reinsert ed.

Duri ng an abn or m ality the su b­power is cutoff. The remote

controller power key operation is
not re cognized a nd s ub-power

off is maintained until the power
cor d is un pl ug ge d an d

reinsert ed.

3. Se lf chec k i n dicati ng fun ct ion

The self ch eck funct ion be gins de tect ion abo ut 5
seconds after power is supplied.

In the event a malfunction is detected, the sub-power is
cutoff immediately.

At this time, the POWER/ON TIMER LED flas hes to
inform of th e ma lf unc tion.

Item LED flashing intervals Pri ority of detection

OCP/ X-ra y At 0.5-second intervals 1

NECK At 0.5-second intervals 2

"

Becaus e OCP and X-ray protectors are inputted to the same pin in the microcomputer, the judgement will be logical sum (OR).

30

POW ER
supplied

No. 51917

About 5 second s
aft er

Detection

start

Malf uction is
det ect ed

SUB- POWER OFF

Flashin
POW ER /
ON TIMER LE D