JVC AV-N21203/S, C-N21103/S, C-N21310/S Service Manual

SERVICE MANUAL

COLOR TELEVISION

C-N21310
C-N21103

AV-N21203

BASIC CHASSIS

C-N21310
C-N21103

AV-N21203

[C-N21310/S]

/S

/S

/S

[C-N21103/S]
[AV- N21203

FV5

/S

]

CONTENTS

!

SPECIFICATIONS ････････････････････････････････

! SAFE TY PRECAUTIONS ････････････････････････････････
!

FEATURES

!

MAIN DIFFERENCE LIST ････････････････････････････････

! SPECIFIC SERVICE ････････････････････････････････
!

SERVICE ADJUSTMENTS

★ STANDAR D CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････

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

1

････････････････････････････････

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

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

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

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

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

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

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

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

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

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

･････････････････････････････････････

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

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

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

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

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･･･････････････････････ 5

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

･･･

･･････

11

･････ 2- 1

･･････････

4

No.519 91

Mar. 2002

Mar. 2002

C-N21310

A

)

C-N21103

V-N21203

SPECIFICATIONS

Items

Contents

C-N21310/S C- N21103/S AV-N21203/S

Dimensions (W

Mass 19.6 kg 20.2 kg 20.4 kg

TV RF System CCIR(M)

Color Sound System NTSC-M

TV Receiving Channels and Frequency

CATV Receiving Channels and Frequency

TV/CATV Total Channel

Intermediate Fr equency

Color Sub Carrier

Power Input 12 0V AC , 60H z

××××H××××

D) 50 .3cm×45.2cm×49 .3c m 59 .2cm×45.6cm×48 .7c m

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

(54MHz～80 4MH z)

NT SC-M / BTSC S yst em
(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 &01)
(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 )

18 0 Ch an nels

45 .75 MHz

41.25 MHz ( 4 .5MHz)

3.58MHz

Power Consumption 87W

Pictur e Tube

Hi gh Vo l t ag e

Speake r

Audio Powe r Output 1W 1W 1W+1W

Input

Video Input

Au dio Input

Au dio Output 1550mVrms(-4dBs)

Headphone Jack

An ten na Ter mi nal

Remote Control Unit RM-C205

21 (51cm) Measured

Diag onal ly
26 .5kV ±1k V ( at zero b eam

current)

5×9cm
Ova l type×1

1V p- p, 75Ω ( RCA pin jac k)

50 0m Vr ms ( -4dB s ) , Hi gh
Im pe da nce (RCA p in jack )

3.5 mm mi n i j ac k
(Sou nd is mon aural)

75(VHF/UHF) Terminal, F-

Ty pe C on nect or

(AA/R6/UM-3 b atte ry×2)

5×9cm
Ova l type×2

Low impedance (400Hz

when m od ul at ed 10 0%

(RCA pi n ja ck)

3.5 m m st er eo min i jack
(Sou nd is ste re o)

2

No. 51991

A

3

SAFETY PRECAUTIONS

C-N21310
C-N21103

V-N2120

1. The d esign of t his p rodu ct c ont ains spec ial h ar dw ar e, man y
ci rcu its and c o mp on ent s s peci al l y for saf ety pur p oses. 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. S er vic e s ho ul d be perf or me d b y qu ali fied
p ers onnel o nly.

2. Al te rati on s of th e des i g n o r circu itr y of the p rodu cts s hou ld 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 pa rt s wh ic h h ave t hes e sp ec ial 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. U se isola tio n tr an sf orme 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. Don't shor t 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 re pa ir h as b ee n mad e to th e c h assi s , i t i s re c om 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 hi g h v olt age a pplied t o the pictu re tu be mu st co nform wi th
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 ir cu it ar ea . W her e a sh ort ci r cuit 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 com p onents.

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 is o l ation
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 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 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 test r e qu ires a t es t eq uip ment n ot g en er ally
fou nd in t he servi c e t ra de.

(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. Connec t a 1 50 0Ω 1 0W resi s tor pa ralle l ed
by a 0.15μ F 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 VOLTMETER
(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 "How to check the high voltage hold down
cir cuit".

This mark shows a fast
operating fuse, the

letters indicated below
show the r ati ng.

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. 51991

3

C-N21310

A

(

)

p

C-N21103

V-N21203

FEATURES

" N ew chas sis d esign enab les us e of a s ingle board wit h simpl i fi ed

circuit ry.

"

Provid ed w ith miniatu re tuner (TV/CATV ).

" Mult if unct ion al rem ote c on trol perm i ts pi ctu re a dj ustm ent.
" Ad option of the CHANNEL GUAR D fun cti on prevent s th e s pecifi c

chan nels from being selected, unl ess th e “ ID nu mbe r” is k ey in.

"

I2C bus control utilizes single chip ICs.

" SYSTEM BLOCK DIAGRAM

MEMORY IC

SCL

SDA

" Ad opti on of the VID EO ST AT US f unc tion .
"

Adoption of the ON/OFF TIMER function.

"

With 7 5ΩV/U in c ommon ( F-Type) AN T Ter minal.

"

SLEEP TIMER for s etting in re al t ime.

" Clos ed- capti on b roa dc asts can be view ed.
" Au di o Vi deo i np ut te rm in al.

"

Au di o outp ut te rminal.(On ly f or AV-N2120 3)

"

Built- in MTS sys tem.(On ly for AV-N21203)

REMOTE

IF1

CONTROL

TUNER

TU NER

CONTRO L

CPU

MAIN M ICON

SCL SDA

TONE

AFC

1Chi

DECO DER

4

No.51991

A

MAIN DIFFERENCE LIST

Model

!!!!

Parts Name

MAIN PW B SFV-108 0A- M2 SFV-108 1A- M2 SFV- 108 5A-M2

!

FRO NT CA BIN ET LC10109- 02 1A- A GQ1 0020-004A -A GG1 0020-002B -A

!

POW E R KNOB LC30 376- 00 4A- A GQ3 002 6-002A -A

!

PUSH KN OB

(CO NTROL KNOB)

!

REAR COVE R LC10 108-00 2E- A GQ1 001 3-003B -A GQ1 001 3-002B -A

C-N21310/S AV-N21103/S AV-N21203/S

LC30271- 00 4A- A GQ3 0025-002A -A

C-N21310
C-N21103
V-N21203

Dimensions (W×H×D)

Mass 19. 6 k g 20. 2 k g 20. 4 k g

Color / Sound S yst em

Aud io Power O utpu t 1W 1W 1W+1W

Audio Output

Spea ker

Headphone jack

50. 3cm×45 .2c m×49 .3cm 59. 2cm×45 .6cm×48 .7cm

NTSC-M

5×9cm

Oval type×1

3.5 mm mini jac k

(Soun d i s monaural)

NT SC-M / B TSC System

(Mul ti Chann el Sound)

15 50m Vr ms(-4dBs)
Low imp edance (400Hz

when modu late d 10 0%)

(RCA pi n jack )

5×9cm
Oval type×2

3.5 mm ster eo mini jac k

(Soun d i s stereo)

No.51991

5

C-N21310

A

C-N21103

V-N21203

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unp lu g t he po we r s upply cord .

[For C-N21310/S]

2. R em ove th e 5 scr e ws marked !

shown in Fig.1.

[For C-N21103/S ]

2. R em ove th e 9 scr e ws marked !

shown in Fig.1.

[For AV-N21203/S]

2. R em ov e the 9 scr ew s mar ked !

shown in Fig.1.

3. W i thdr a w t he REAR CO VE R t o wa rd you .

[CAUTION]

"

W hen reins t all in g the r e ar cove r, c arefu ll y pus h it i nw ar d af ter

inser ti n g the MA IN PWB i nt o the r ear c ove r gr oo ve .

!an d a scr ew ma rke d """"as

!!

!an d a scr ew ma rke d """"as

!!

!an d 2 s crews m ar ked """"as

!!

REMOVING THE MAIN PW BOARD

" After removing the rear cover.

1. Pic k t hi s side of t he MAIN PW B and rais e on e sligh tl y, tak e off

th e PW B s top per ma rke d #

2. Pu ll out the MAIN PW B as it is.

(If necessary, take off the wire clamp and connectors, etc.)

# from th e ca binet b ott om.

##

REMOVING THE SPEAKER

" Af ter r em oving th e MAI N PW boar d.

1. Rem ove the 2 scr ew s m ar ked

[For C-N21310/S and C-N21103/S]

SP EAKE R ( ×1)

[For AV-N21203/S]

SP EAKE R (×2)

$$$$

.

CHECKIN G THE MAIN PW BOARD

1. To ch eck the ba ck s ide of the MAIN PW Boa rd.

1) Pu ll out the MAIN PW B. ( R ef er to REM OVI NG T HE M AIN

PWB ) .

2) Erec t th e chass is verti ca lly so th at you ca n eas ily check the

backside of the MAIN PW Board.

[CAUTION]

"

When er ect in g t he M AIN PW B, be car ef ul so tha t th er e will be n o

con tact in g with ot her P W Board .

"

Befor e turning on p ower, make su re t hat the CRT e arth wir e and

oth er c o nn ecto rs are p rop er ly c onn ect ed.

WIRE CLAMPIN G AND CABLE T Y ING

1. Be sure c lamp th e wir e.

2. Never rem o ve th e cable ti e used f or tyi ng the w i re s to gethe r.
Sh oul d it be i n adv e rt ent l y rem ove d, be su r e to tie the wires with

a n ew c able tie.

6

No. 51991

A

3

FRONT CABINET

CRT SOCKET PWB

(Within MAIN PWB)

SPE AKE R

BRAIDED ASS’Y

C-N21310
C-N21103

V-N2120

DEG. COIL

REAR COVER

D

MAIN PWB

PWB STOP PER

C

Thi s expl od ed view des crib es

ab out the C- N213 10 /S.

Alth ou gh th e C-N21 10 3/S a nd

AV -N 21 20 3/S is sl ig ht ly dif fer en t

fr om thi s f ig ur e, you can u se t his

figu re for d isasse mblin g th e C-

N21103 /S an d A V-N21 203 /S in

the same steps.

B

A

Fig.1

No. 51991

7

C-N21310

A

C

S

[

]

C-N21103

V-N21203

MEMORY IC REPLACEMENT

1. Memory IC

This TV uses a memory I C.
Thi s m em or y IC st ores d ata f or pr oper o pera tion of the vide o and deflec ti o n cir cuits.

When replacing t he memory IC, b e su r e t o use an I C writte n with th e in itia l va lues of data.

2. Memory IC replacement procedure

Procedure Screen display

(1) Power off

Switch off th e pow er an d di s con nec t th e p ow er c o rd fro m t he out let.

(2) Replace the memory IC

Be sure t o use a memory I C written with the initial settin g data.

(3) Power on

Con nect th e power cord to th e o utlet and switch on the power.

(4) System constant check and setting

" The adjustment should not be done without signal

1) Pr ess SLE EP TIMER key and, while the indication of “SLE EP 0 MIN.”

is being displayed, press DISPLA Y key and VIDEO STA TUS key on
th e r em ot e c ontro l u nit simu lt aneous ly .

2) The SERV ICE M ENU sc r ee n of Fi g.1 is d isp l ayed .

3) W hi l e th e SER VI CE M EN U is d is pl aye d, again simu ltan eou sly p ress

th e DISP LA Y and VIDEO STA TUS ke y s to di s play th e Fig.2 SYSTE M
CONSTANT screen.

4) Refe r to t he SYSTEM CONSTANT t abl e 1 and c hec k th e setti ng item s.
Wher e th ese di ffe r, s el ec t t he s etti n g i tem wit h th e M EN U UP /DOW N

key and adjust the s ettin g with th e MENU L EFT /RIGHT keys. ( Th e
letters of the selec ted item are displayed in yellow.)

5) Af ter ad justing, r el e ase t he ME NU L EF T /R IGHT k ey t o st ore th e set ti ng
value.

6) Press the EX IT key t wice to r eturn th e n ormal scr een.

(5) Rec eiv e channel setting

Refer to t he OPERATING INSTRUCTIONS(USER'S GUIDE) and s et the
receive channels (Channels Preset) as described.

(6) User settin gs

Check th e us er s ett ing it ems ac c ordi ng to Tabl e 2.

Wher e thes e d o not agree, r ef er to th e OP ERATIN G I NSTRUC TION S
(USER'S GU IDE) an d s et t he it ems as des crib ed.

SERVICE MENU

PIC TURE SOUN D
GAME

LOW LIGHT HIGH LIGHT
RF AF C CHK

VCO(CW)

SELECT BY EXIT BY
OPERATE B Y EXIT

Fig.1

SYST EM CO NST ANT

MODEL : *******

HI P : YE

V­CAN V-CHIP : YES

********

********-*****

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

SELECT BY EXIT BY
OPERATE B Y EXIT

*****

**********

*******

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

Fig.2

Only for AV -N21 20 3/S

Indicated Model Na me

(7) SERVICE MENU setting

Ve rif y what to s et i n th e SER VI CE M EN U , and s et what ever is

necessary.(F ig.1 ) Refer to t he SERV ICE ADJUSTM ENT f or settin g.

8

No. 51991

A

3

TABLE 1 (System Constant setting)

Setting value

Setting items Setting contents

C-N21310/S
C-N21103/S

MO DE L Disp l ay th e each a pp licat ion mo del Conf orm abl e m od el n am e

C-N21310
C-N21103

V-N2120

AV-N21203/S

V-CHI P YE S YE S

CAN V-CHIP YE S YE S

YE S NO

YE S NO

TABLE 2 (User setting value)

Setting items Setting value

1. Us e rem ot e c ontr oller keys

POWE R

CHANNEL

CHANNEL PRESET

VOL UME

INPUT (TV/V IDEO)

DISPLA Y

SLEEP TIMER

VIDEO STATU S

2. Set ting of M EN U

TINT

COLOR

PICTURE

BRIGHT

DETAIL

BA SS

TR EBL E

BALANCE

MTS

TV S PEAKER

NOISE M UT ING

SE T VIDEO STATU S

SE T CLOC K

ON/OFF TIMER

LA NG UA G E

CLOS ED CAPTIO N

BACKGROUND

AUTO TUNER SETUP

CHANNEL SUMMARY

V-CHI P

SET LOCK CODE

OFF

CH 02

See O PER ATING I NSTR UCT IO NS .

10

TV

OFF

0

STANDARD

CENTER

CENTER

CENTER

CENTER

CENTER

CENTER

CENTER

CENTER

STEREO

ON

ON

ALL CENTER

Unnecessary to set

NO

SP ANISH

OFF

BLACK

TUNER MODE : AIR

Unnecessary to set

OFF

(0000) : Unnecessary to set

[Only for A V -N21 20 3/S ]

No. 51991

9

C-N21310

A

C-N21103

V-N21203

REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating for more than 3 seconds.

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

3. W hen rem oving a c hip part, mel t th e s older adequ ately .

4. D o n ot r euse a ch ip p ar t afte r re mo ving it .

! SOLDERING IRON

1. U se a hig h i ns ulatio n s ol der i ng i r on wi th a thi n poin ted e nd of it.

2. A 3 0w s older i ng i r on is rec omm end ed for easil y r em oving p ar ts.

! REPLACEMENT STEPS

1. How to remove Chip parts

#

Resi stors, ca pacitors , etc .

(1) As s h ow n in t he fi gu re, p us h th e p ar t wi th tw eez er s an d

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

2. How to install Chip parts

#

Resi stors, ca pacitors , etc .

(1) Apply solder to th e patt ern a s i ndicated in the fi g ure.

(2) Sh if t wi th tw eeze rs and r emo ve th e c h i p p art.

#

Trans isto rs, d io des , va ria bl e r esist or s, etc.

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

SOLDE R

(2) As s h ow n in t he fi gu re, p us h th e p ar t wi th tw eez er s an d

alte rn at ely melt th e s olde r at eac h l e ad. Shift a nd r em ove th e

chip part.

SOLDE R

(2) Grasp the ch ip p art w i th twe ezers a nd p la ce it on the s older .

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

# Transist o rs, dio d es , 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 solder.

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

A

B

C

(4) T he n solder le ads B and C.

A

B

C

Note : A fte r rem oving th e part, re move remain ing solder from th e

pattern.

10

No. 51991

A

3

SERVICE ADJUSTMENTS

)

)

ADJUSTMENT PREPARATION:

1. You c an ma ke the nec es sary adjustme nts for t his unit wi th

eit her the R emot e Co ntrol Unit or W ith the adjust m e n t

tool s and parts as given below.

2. Adjustment with the Re mote Control Unit is ma de on t he

bas is of t h e initial sett in g v al ues, howev er, t he ne w s etti ng

values which set the screen to its optimum condition may

differ f rom the init ia l s ettings.

3. M ake sure t hat AC p ower is tu r ned on c orrec tly.

4. T ur n on t he powe r for set and test equ ipm ent bef ore us e, an d

start th e adjus tme nt p r oced ur es aft er waitin g at l east 30

min ute s.

5. Unless oth er w is e spec if ied, pr epar e th e most s ui tab le rece ptio n

or inp ut sign al for adjust ment.

6. N ever t ouch an y ad ju stm en t p ar ts which a re n ot sp ecified i n th e

list for t hi s adjus tm ent - va r i abl e r es istors, tr a ns fo rmer s ,

condensers, etc.

7. Pr esetti ng before ad j ustm en t.

Unless oth erw is e spec if i ed i n th e adjustmen t i ns tr uc t ions,

pres et t he f ollowing function s wi th the rem ote co ntr ol u nit:

User mode position

MENU ITEMS PRESET VALUE

VIDEO STATU S STA NDARD

TINT / COLOUR
PICTURE / BRIGH T

DETAIL

CENTER

C-N21310
C-N21103

V-N2120

ADJUSTMENT EQUIPMENT

1. DC voltmeter (or digital voltmeter)

2. Oscilloscope

3. Si gn al g ener at or (P attern g en erat or) ［NTSC］

4. Remote control unit

5. TV a ud io multi ple x si gn al ge ne rator .

6. Frequ enc y c ou nte r

ADJUSTMENT ITEMS

Ad just ment it ems Ad just ment item s

"

B1 POW E R SUPPL Y

" VIDEO / DEF. CIRCUIT Low Light

IF V CO

" WHITE BA LAN CE

Hig h Light MTS STEREO VC O

BA SS / TREBLE
BALANCE

MTS ST ERE O (Only for AV-N21203/S

Adjustment item s

(Only for A V -N21 20 3/S )

"

MTS CIRCUIT

MTS IN PUT L EVEL check

CENTER (Only for AV-N21203/S

RF. AGC

FOCUS SUB BRIGHT MTS FILTER check

V. SIZE SUB C ON TRAS T MTS SE PARATIO N

H. PO SIT IO N MTS COLOR

"

PICTURE MTS SA P VCO

SUB T I NT

No. 51991

11

C-N21310

A

(

)

)

C-N21103

V-N21203

ADJUSTMENT LOCATIONS

FRO NT

TP-91
(B1)

R926

POWER

PW

DEG.

F902

F901

ON

TIME R

REM OCON
RECEIVER

TP-12B

CW

31

MP X

IC701

T131 CW

IC201

MENUCH-CH+VOL-VOL+

T

IC702

TUNER

AV-N21203/ S

STEREO

C-N21310/S
C-N21103/S

S

MAIN PWB

IC421

U

HV

HVT

TP-E
( )

IC921

CRT SOCKET PWB

Within MAIN PWB ASS'Y

TP-R

T

TP-E

(SOLDER S IDE

CR T EAR TH

(BRAIDED ASS' Y)

UPPE R : FOCUS
LOWER : SCREEN

U

E1

12

No. 51991

A

3

BASIC OPERATION SERVICE MENU

1. TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

2. SE RVICE M ENU ITEM S

In ge nera l, basic s ett ing( ad justmen ts ) i tem s o r v er if i cation s ar e pe rf orme d i n the S ERVICE MENU.

"

PICTURE ････････････････････ Thi s se ts th e setti ng values ( adj ust me nt values ) of t he VIDEO /CHROM A and D EF L EC T ION ci rcu its.

" SOUND ･･･････ ･････････････ ･ This s e ts th e s etting va lues ( adj ust me nt values ) of t he AUD IO ci r cuit. [Only for AV-N21203/S]
"

GAME ･･･････ ･････････････ ･･･ This i s us ed w hen the GAM E MO DE is a djust ed.

" LOW LIGHT ･･･････ ･･･････････ T hi s se ts th e s etti ng values ( a djust me nt val ues ) of t he W HIT E BALANC E ci r cuit.
"

HIGH LI GHT ･･･････ ･･････････ T hi s se ts th e setti ng values ( a djust me nt values ) of t he W HIT E BALANCE ci r cuit.

" RF AFC CHK･･･････ ･･････････ This i s us ed w hen the I F VC O i s a dj ust ed. [Do not adjust]
"

VCO (CW ) ･･･････ ････････････ T hi s is us ed when th e IF VC O is a djust ed.

3. Basi c Op era tions of th e SERVI CE M EN U
(1) Ho w to enter the SERVICE MENU.

Press SLE EP TIMER ke y a nd, wh ile th e in di cat i on of “SLE EP 0 MIN.” is being displayed, press DISPLAY key and VIDE O ST ATUS key
on t he re mo te con tr ol un it simultan eo usly t o ente r t he SE RV ICE M EN U sc r ee n .

(2) SE RVICE MENU screen selecti on

Press the UP / DOWN key of the MENU to select any of the following items.

(The l e tte rs of the s elect ed it ems are di sp layed in ye llo w. )

C-N21310
C-N21103

V-N2120

(3) Enter the any setting ( adjustment ) mode

" PICTURE and SOUND mode

1) If select any of PICTURE or SOUND items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN MENU ), the screen

② will be dis played as shown in figure page later.

2) The n the UP / D OW N k ey is pr ess ed, t he PICTU R E m ode scr een ③ or t he SOUND mo de sc re en ④ i s disp layed , a nd the P IC T U RE

or SOUND setting can be performed.

" GAME, LOW LIGHT, HIGH LIGHT, RF AFC CHK and VCO (CW) mode

1) If select any of GA ME / LOW LIG HT / HIGH LIGHT / RF AFC CHK / VCO ( CW ) items, and t he LEFT / RIGHT ke y is presse d from

SERVICE MENU ( MAIN M ENU ), th e scr eens ⑤ ⑥ ⑦ ⑧ ⑨ will be dis played as shown in figure page later.

2) The n the sett in gs or verifi cation s ca n be p erfor med .

[Only for A V -N21 20 3/S ]

No. 51991

13

C-N21310

A

C-N21103

V-N21203

SERV IC E MENU (MAI N ME NU)

①①①①

SE RV IC E M EN U

PICTURE

GAME

LOW L IGH T HIGH LI GHT

RF AFC CHK

VC O (CW )

SE LEC T BY
OPERATE BY

SOUND

EX IT BY

[Onl y for AV-N212 03/S]

HIGHLIGHT MODE

⑦⑦⑦⑦

HIGH LIGHT

** *

** *

** *** *

EX IT BY

RF AFC CHK M ODE [DO NOT AD JUST ]

⑧⑧⑧⑧

EXIT

** *

** *

** *** *

EXIT

SCREEN

②②②②

IT

SE LEC T BY

④④④④

SOU ND MO DE

EX IT BY

EXIT

IT

SE LEC T BY
OPERATE BY

1. BR IGHT
STATUS

PICTURE MODE

③③③③

** *

** *

** *** *

** *** ***

** *** ***

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

EX IT BY

EXIT

IT

[Onl y for AV-N212 03/S]

** *

1 . IN L E VE L
STATUS

IT

SE LEC T BY
OPERATE BY

** *

** *** *

** *** ***

** *** ***

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

EX IT BY

EXIT

IT

RF AFC

FINE

STATUS

SE LEC T BY
OPERATE BY

VCO (CW) MODE

⑨⑨⑨⑨

TOO HIGH

ABOVE REFERENCE

BELOW REFERENCE
TOO LOW

SY N C : YE S

** *

** *

** *** *

** *** ***

** *** ***

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

EX IT BY

EXIT

EX IT BY

EXIT

ON

IT

GAME MODE

⑤⑤⑤⑤

** *

** *

TINT

COLOR
PICTURE

BRIGHT

DETAIL

IT

SE LEC T BY
OPERATE BY

BR IG H T

BRIGHT

** *** *

** *

** *

** *** *

** *

** *

** *** *

** *

** *

** *** *
** *

** *

** *** *

LOW LIGHT MODE

⑥⑥⑥⑥

** * ** * ***

** * ** * ***

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

** *

** *

** *** *

EX IT BY

EXIT

EX IT BY

EXIT

IT

IT

14

No. 51991

A

3

(4) Setting method

1) UP / DOW N key of the MENU

Se lect the SETTING ITEM .

2) LE FT / RIGH T key of the MENU

Setting ( adjus t) t he INITIA L SETTING VA LUE of th e SETT ING ITEM.
W hen th e key is r el ea s ed th e S ETT IN G V ALU E will b e s tor e d

(memorized).

3) EX IT key

Retu rn s to the p re vious scr een .

(5) Releasing SERVICE MENU

1) Af ter r etu rni ng t o th e S ERVIC E MENU u pon com pl e tion of t he sett ing
(adjus tment) wo rk, pr ess t he EXI T key ag ain.

★

★

1. BRI GHT
STAT US

SELECT BY
OPERAT E BY

PICTURE MODE

SETTING
ITEM

1. I N LEVEL
STAT US

SELECT BY
OPERAT E BY

SOUND MODE
[Only for AV -N 21 20 3/S ]

***

***

******

********

********

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

EXIT BY

EXI T

***

***

******

********

********

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

EXIT BY

EXI T

C-N21310
C-N21103

V-N2120

SETTING
VALUE

***

TINT
COLO R
PIC TURE
BRI GHT

DETA IL

SELECT BY
OPERAT E B Y

***

******
***

***

******

***

***

******

***

***

******

***

***

******

GAME M ODE

The lett er of th e selec ted
Items are displayed in yellow.

EXIT BY

EX IT

IT

No. 51991

15

C-N21310

A

C-N21103

V-N21203

INITIAL SETTING VALUE OF SERVICE MENU

1. Ad ju stm en t of th e S ERVIC E MEN U i s mad e on the basis of the in i ti al se tting val u es; h ow e ve r , th e n ew se tting valu es w hi c h set the screen
in its optimu m c ondit ion ma y dif fer fr om th e in it ial sett in g.

2. Do not c hange th e in it ial set ting value s of the se tting (A dj u stment ) i t ems not l i sted i n “ADJU STMENT ”.

""""

PICTURE M ODE

$ The fo ur se tting ite ms in the vid eo mode No.7 EXT B RI., No.8 EXT P IC., No.11 EXT TINT and N o.12 EXT COL. a re l inked t o t he items in

the TV MODE No.1 BRIGHT, No.2 PICTURE, No.5 TI NT and No.6 COLOR, respectively. When the setting items in the TV mode are
ad juste d, the valu es i n t he sett ing item s in th e v ideo m od e ar e re vised autom ati ca lly to th e sam e v alues i n the TV mo de .(Th e i nitial setting

val u es given in ( ) ar e off -set v alu es.)

$ W hen th e f our ite ms (No. 7, 8, 11 a nd 12) ar e adju ste d in t he vide o mod e, the set ting valu es in each item are r evis e d in dep en dently.

No . Setting (Adjustment) items Variable range

1. BRIGHT 0 ～ 127 64 64

2. PICTURE 0 ～ 127 95 95

3. TV DTL(TV DETAIL) 0 ～ 63

4. TV BPF(TV B.P.FILTER) 0 / 1 0 0

5. T IN T

6. C OLOR 0 ～ 12 7

7. EXT B RI.(EXT.B RIGHT)

8. EXT PIC.(EXT.P ICTU RE ) ±25 (±0) (±0)

9. EXT DTL(EXT.DETAIL) 0 ～ 63 26 26

10. EXT BPF(EXT.B .P. FILTER) 0 / 1 0 0

11. EXT T INT ±25 (±0) (+1)

12. EXT C O L.(EXT. CO LOR) ±25 (±0) (+3)

13 . V S IZE 0 ～ 63 38 38

14. V CENT.(V.CENTER)

15. H POS .(H. POSI TION)

16. OSD HP (OSD H PO SITIO N )

17. OSD VP (OSD V POSITION)

18. H. AFC 0 / 1 0 0

19 . R F AGC 0 ～ 63 40 40

20 . OSC S EL 0 / 1 0 0

0 ～ 12 7 70 70

±

25

0 ～ 700

0 ～ 31 20 20

0 ～ 31 26 26

0 ～ 15 14 14

Initial setting value

C-N21310/S
C-N21103/S

26 26

48 48

(-1)

AV-N21203/S

(±0)

" SOUND MODE [Only for AV-N21203/S]

16

～

～

～

～

～

～

±

No. 51991

A

3

"

GAME MODE

No . Setting (Adjustment) items Variable range Initial setting value

C-N21310
C-N21103

V-N2120

1. TINT

2. COLO R

3. PICTURE

4. BR IGHT

5. DETAIL

"

LOW LIGHT MODE

No .

1. R CUTOFF 0 ～ 25 5 20

2. G CU TOF F 0 ～ 25 5 20

3. B CUTOFF

"

HIGH LIGHT MODE

No .

1. G DRIVE

2. B DRIVE 0 ～ 25 5 128

Setting (Adj ustment) items

Setting (Adj ustment) items

±20 ±0

±20 ±0

±20 -10

±

20 -5

±

15 +5

Variabl e ra ng e Initial setting value

0 ～ 25 5

Variabl e ra ng e Initial setting value

0 ～ 25 5

20

12 8

"

RF AFC CHK MODE

No .

1. RF AFC ON / OFF

2. FIN E -77 ～ +77

Setting (Adj ustment) items

Variabl e ra ng e Initial setting value

ON

±＊＊＊

DO NOT
ADJUST

No. 51991

17

C-N21310

A

C-N21103

V-N21203

■■■■

ADJUSTMENTS

B1 POWER SUPPLY

Item

Check of

B1 POWER
SUPP LY

Measuring

instrume nt

DC Voltmeter TP-91 (B1)

Test point Ad justment part Description

""""

TP-E(

)

ADJUSTMENT OF VIDEO / DEF. CIRCUIT

Item

IF VCO

adjus tme nt

Measuring

instrume nt

Signal

generator

TOO HIGH
ABOV E REFERENCE
BELOW REF ERENCE
TOO LOW

Test point Ad justment part Description

CW TRANSF. (T131)

[VCO(CW)] MODE

YE LLOW

1. R eceive a bl a ck- a nd-whit e sign al .

2. Con nect th e DC Vo lt met er t o TP -91 (B 1) and TP- E(
p age of Ad jus tm ent L oc ati o ns) .

3. Confirm that the voltage is DC134V

" U nd er n orm a l c onditions, no ad just ment is r e quir ed .

1. Recei v e a N T SC br oa dc a s t. (u se ch annels w i tho ut off set

fr eq uenc y) .

2. Se le ct t he VCO( CW ) m ode from th e SERVI CE ME NU.

3. C onf ir m th e colo r chan ge ( yello w) fr om “TOO HIG H” to “TOO

LOW”by C W T RA NS F .T 131 an d “SY NC : YES” be ing sh own

on th e screen. Th en, adju st C W TR ANSF.T1 31 u ntil “BE LOW
REFERENCE” mark turns ye l low an d co nfi r m a gai n “ SYNC :

YE S” b ei ng shown o n th e s creen .

+2V

-2. 5V .

""""

).(See the

RF. AGC

adjus tme nt

FOCUS

adjus tme nt

SYNC : YES

Signal

generator

EXIT BY

EX IT

IT

No .19 RF AGC 1. R eceive a br oad cast .

2. Select “No.19 RF AGC” of the PICTURE MODE.

3. Press the MUTE key and turn off color.

4. Wi th t he M EN U LEF T key, ge t n oi se in t he scr ee n p ic tur e. (0

si de of s ett ing val ue)

5. Press t he ME NU RIG HT key a nd sto p w h en nois e di s a pp ears

fr om th e sc re en.

6. C ha nge t o oth er cha nn els and ma ke sur e th at th er e Is n o

irregularity.

7. Pr ess the MUTE key and ge t co l or ou t.

FOCUS VR

[In HVT]

1. R eceive a cross hat ch si g nal.

2. W hil e l oo k i ng at th e scre en, adjust FOC U S V R so t hat th e

vertical and horizontal lines will be clear and in fine detail.

3. M ak e s ur e t hat th e pi ct ur e is i n focu s eve n wh en the s cree n g ets

d ark ened.

18

No. 51991

C-N21310

A

3

C-N21103

V-N2120

Item

V.S IZE
Ad j ust men t

Scr een

size

92 %

Measuring

instrume nts

Signal
generator

Test point Ad justment part Description

No .13 V.S IZ E 1. Recei v e a cr oss hat ch sig na l.

2. Select No.13 V SIZE in the PICTURE MODE.

3. Se t the initial set ting value of N o.13 V SI ZE with th e LE FT /
RIGHT key of the MENU.

4. Adjust No.13 V SIZE until the vert ic al scr een size is 9 2 %.

Scr een s ize

Picture
size

10 0%

Picture size 100%

H. PO S IT IO N

Ad j ust men t

Signal

generator

No .15 H POS . 1. Receiv e a cros s hat ch si g na l.

2. Sele c t t he No.15 H POS . of th e P ICTURE MO DE .

3. Set the initi al setting value of the No.15 H POS. with the LEFT /

RIGHT key of the MENU.

4. Ad jus t t he No. 15 H POS . u nti l the sc r een w ill b e ho ri zo nta lly

centered.

No. 51991

19

C-N21310

A

C-N21103

V-N21203

ADJUS TMENT OF WHITE BALANC E

Item

Measuring

instrume nts

Test point Ad justment part Description

WHITE

BALANCE
(Low Light)
Ad j ust men t

Signal

generator

[LOW LIGHT] MODE

BRIGHT

R CUTOFF

***

***

BRI GHT

***

***

******

BRI GHT

REMO T E CO NTROL UN IT

H.LINE ON EXITH.LINE OFF

1 2 3

R CUTOFF B CUTOFFG CUTOFF

******

***

***

******

G CUT OF F

BR IG HT

R. CUTOFF
G. CUTOFF

B. CUTOFF

SCREEN VR

[In HVT]

B C U TO FF

***

***

******

EXIT BY

IT

EX IT

1. Receive a black-and-white signal.(Color off)

2. Select the【LOW L IGHT】MODE fr om the SERVICE M ENU .

3. Se t th e i n itial s e tti ng v alu e of B RI GHT wi th t he LE FT /
RIGHT key of t he rem ote control unit.

4. Set the initial s etting value of R CUTOFF, G CUTOFF and B

CUT OFF with the ④ to ⑨ key of the remote control unit.

5. Disp l ay a sing le h orizo ntal li ne by p r essi ng the ①key of the

remote control unit.

6. Tur n the sc r een VR a l l the way t o t he left.

7. Turn th e s creen VR gr adu all y to t he right fro m the left unti l

eith er o ne of the red, blu e o r g r een co l ors appea rs f aintl y.

8. Ad just th e t wo colors w hi ch di d n ot app ea r unt il th e sing l e
horizontal line that is displayed becomes white using the ④

to ⑨ keys of the remote control unit.

9. Tur n the sc reen VR to wher e th e sing le h or izo ntal lin e glo ws
fain tly.

10 . Press the ② key to return to t he regular scree n.

＊

The ③ EXIT key is th e cancel key for the WHITE

BALANCE.

WHITE

BALANCE
(High Light)

Ad j ust men t

R CUTOFF B CUTOFFG CUTOFF

Signal

generator

[HIG H LI GHT] MO DE

G DRIVE B DR IVE

HIGH LIG HT

54

***

*** ***

******

***

******

EXIT BY

6

987

G. DRIVE

B. DRIVE

IT

EX IT

1. Recei v e a bla ck-a nd-whit e sign al. (C olor of f)

2. Select t he【HIGH LIGHT】MODE in the SERVICE MENU.

3. Set the initial setting value of G DRIVE and B DRIVE with the

⑤, ⑥, ⑧ a nd ⑨ ke ys of the remote co ntrol unit.

4. Ad ju st t he s creen u ntil it bec om es wh ite u sing the ⑤, ⑥, ⑧

an d ⑨ keys of t he remote control unit.

＊ The ③ (EXIT) key is t he cancel ke y for the WHITE

BALANCE.

Remote Control Unit

①

key : H.LINE ON

② key : H.LINE OFF
③ key : E XIT
⑤ key : G DRIV E ▲
⑥

key : B DRIVE

⑧

key : G DRIV E

▲
▼

⑨ key : B DRIVE ▼

20

No. 51991

A

3

ADJUS TMENT OF PICT URE

[

]

Item

Measuring

instrume nts

C-N21310
C-N21103

V-N2120

Test point Ad justment part Description

SUB

BR IG HT
Ad j ust men t

SUB
CONT RAST

Ad j ust men t

SUB

COLOR
Ad j ust men t

No.1 BRIG HT 1. Recei ve a broad cast .

2. Select No.1 BRIGHT of the PICTURE MODE.

3. Set th e initial setting value of th e No .1 BRIGHT with the
LEFT / RIGHT ke y of the ME NU .

4. If the br ight ness is not best w it h the initi a l s ettin g valu e, mak e

fine adjustment of the No.1 BRI GHT until you get the
op ti mu m br i ght ness .

No .2 P IC T UR E 1. Recei ve a br oad cast .

2. Select No.2 PICTURE of the PICTURE MODE.

3. Set the initial setting value of the No.2 PICTURE with the
LEFT / RIGHT ke y of the ME NU .

4. If the contrast is not best with the initial setting value, make
fin e a djust ment of the No.2 PICTUR E unti l you ge t th e

optimum contrast.

No.6 COLOR 1. Recei ve a br oad cast .

2. Select No.6 COLOR of the PICTURE MODE.

3. Se t th e i n itial s e tting valu e of th e N o .6 CO LOR wi th th e

LEFT / RIGHT ke y of the ME NU .

4. If th e co lor is n ot best with th e initial s etting value , m ake f ine

ad justmen t of the No .6 C OLO R unti l you g et th e opt i mu m
color.

SUB TINT

Ad j ust men t

No .5 TI NT 1. Receive a br oad cast .

ADJUS TMENT OF MTS CIRCUIT [Only for AV- N21203/S]

Item

MTS IN PUT
LEVE L

che ck

MTS
STEREO

VCO
adjus tme nt

Measuring

instrume nt

Signal
generator

Frequency
counter

Test point Adjustment part Description

No.1 IN LEVEL 1. Se le ct t he “N o. 1 IN LEV EL” of th e S OUND MODE.

R OUT

AUDIO OUT

No.2 FH M ON.

No.3 ST VCO

2. Select No.5 TINT of the PICTURE MODE.

3. Set the initial setting value of the No.5 TINT with the LEFT /

RIGHT key of the MENU.

4. If t he tint is n ot b est wit h the in itia l settin g value, make f ine

ad justmen t of th e N o .5 T INT unt il yo u get the o ptim um ti nt .

2. Verif y tha t th e “N o.1 IN L EVE L” is s et at its initial s etting valu e.

1. R eceiv e a RF si gn al (n on -mod ulat ed sound si gn al) from the
antenna terminal.

2. Se le ct t he “N o.2 FH MON.” of SO UND M ODE, a nd ch ang e t he
set ting valu e fr om 0 to 1.

3. C on nec t th e Fr eq u ency C o un ter to R OU T RCA pi n of th e
AUDIO O UT.

4. Se le ct t he “N o. 3 ST VC O”.

5. Se t th e i ni ti al s etting val u e of t he “No. 3 ST V CO ” w it h the

LE FT/ RIGHT key of t he me nu.

6. Ad just th e “No. 3 ST VCO” so th at th e F r eq ue ncy Co un ter will
display 15.73kHz±0.1 kHz.

7. Select the “No.2 FH MON.” of the SOUND MODE, and reset
the setting value from 1 t o 0.

No. 51991

21

C-N21310

A

C-N21103

V-N21203

Item

MTS SAP

VCO
adjus tme nt

MTS FILTER
che ck

Measuring

instrume nt

Signal

generator

Frequency
counter

Test point Ad justment part Description

【【【【

】】】】

MPX

Connector

【【【【4】】】】 pin SDA
【【【【3】】】】pin GND

R OUT

[AUDIO OUT]

No .8 5 FH M ON.

No .9 S A P VCO

No .5 FILTER 1. Se le c t t he “N o. 5 FIL TER” of th e SOUND MOD E .

1. Recei v e a R F si g na l (n on mod ulat ed s oun d sign al) fr om th e

antenna terminal.

2. C on nect bet w een pi n【4】of【MP X】co nnector a nd GN D ( Pi n

【3】of【

3. Se lec t th e “ N o.8 5FH M ON .” of th e SO UND MO DE , a nd r eset

the setting value from 0 t o 1.

4. C on nect th e F r eq uen cy Co un ter t o R OUT R CA pi n of th e

AUDIO O UT.

5. Se le ct t he “No.9 SA P VC O ”.

6. Set the initial setting value of “No.9 SAP VCO” with the
LE FT/ RIGHT key of t he me nu.

7. Ad jus t th e “ N o. 9 SAP VCO” so th at th e Fr e qu enc y Cou nt er wi ll

display 78.67kHz±0.5 kHz .

8. Se lec t th e “ N o.8 5FH M ON .” of th e SO UND MO DE , a nd r eset

the setting value from 1 t o 0.

2. Verify that the “No.5 FILTER” is set at its initial setting value.

MP X】co nnector ) th ro ug h 1 MΩ Resistor.

MTS

SE PARATIO N
adjus tme nt

L- Chann el
signal wave form

1 cycle

TV audio

mult iplex
signal

generator

Oscilloscope

L OUT

R OUT
[AUDIO OUT]

R-C hannel
crosstalk por ti on

Mi n i m u m

No.6 LOW S EP.

No.7 HI S EP .

1. Input a ste re o L sig nal ( 30 0Hz) fr om th e TV a udi o mu ltipl ex

si gn al g ene r ator t o the ant enna term in al .

2. Con nect an os cill os c ope t o L OUT RCA pi n o f the AUD IO OU T,

and display one cycle portion of the 300Hz signal.

3. Cha nge the c onn ecti o n of the o scil losc op e to R OU T RCA pin of

the AUDIO OUT , and enl arge the voltage axis.

4. Sele c t t he “No. 6 LOW SE P.” of th e S OUND MODE.

5. Set the init ia l se tting val ue of the “No. 6 LOW SEP .” with th e
LE FT/ RIGHT key of t he me nu.

6. Ad jus t th e “ N o.6 L OW SEP .” so t ha t th e s tr ok e e le m ent o f th e
300Hz signal will bec ome minimum.

7. Cha nge t he sig nal to 3 kH z, and si m i l ar l y adj us t th e “No. 7 H I
SE P.”.

22

No. 51991

A

3

ADJUSTMENT OF PURITY / CONVERGENCE

PURITY ADJUST MENT

1. Dem ag ne tize CRT w it h t he dema gn etizer.

C-N21310
C-N21103

V-N2120

2. L oose n the r e tain er scr ew of th e d eflec tion y oke .

3. Rem ove th e wed ges.

4. Inp ut a g r een rast er sign al fr om the sign al ge ner at or, an d turn

th e scr een t o gr een r aste r.

5. Move the deflection yoke backward.

6. Br ing t he lo ng l ug of th e p urity m agn ets on the short lu g a nd
p osition t he m horizon tall y. ( F ig. 2)

7. Ad ju st t he ga p be tween two l ug s so that th e GREEN RAS TER
will come into the center of the screen. (Fig.3)

8. M ove the deflec t ion y oke for w ar d, a nd fix the pos iti o n of th e
deflection yoke so that the whole screen will bec ome green.

9. Ins ert th e we dg e t o th e t op s ide of the def lect ion yo ke so that it
will not mo ve.

CR T

%

P/ C MA GN ETS

WEDGE

DEFLECTION

P

P / C

MAGNET S

P : PURITY M AGN E T
4 : 4 P OLES ( c on v er gen c e m agn ets)
6 : 6 P OLES (con ver gen c e m agn ets)

Fig.1

PURITY MAG NETS

YOKE

46

10 . Inp ut a cross hat ch sig na l.

11 . Ve rif y that th e scre en is hor i z on tal.

12 . Inp ut r ed and b l ue r ast er sign al s, a nd m ak e sur e tha t purity is

prop er l y ad juste 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. 51991

23

C-N21310

A

C-N21103

V-N21203

STATIC CONVERGENCE ADJUSTMENT

1. Inp ut a cr oss hatch s ig na l.

2. Usin g 4 - pole con ver ge nc e m agn ets , overla p t he r e d and bl u e
lines i n th e cen ter of th e screen (Fig. 1) a nd tu rn the m to

mag ent a (r ed/ blue ).

3. Us in g 6 - pole con verge nce magn ets, ov er l ap the
mag ent a(red/b l ue) a nd green l i nes in t he cen ter of the scr een

an d t urn t hem t o whit e.

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

DYNAMIC C ONVERGENCE ADJUSTMENT

1. Move th e def lec ti on yok e u p an d down and overlap th e lin es in

the periphery. (Fig . 2)

2. M ove th e deflec ti on yoke left to ri gh t and over lap the lines i n the
p erip her y. (Fi g. 3)

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

(FRO NT VIEW )

(FRO NT VIEW )

BLUE

GREEN

RED

RED

Fig.1

GREEN

BLUE

RED

GREEN

BLUE

●

After ad justmen t, f ix the wed ge at the origin al p osition .

Fas t en the r eta in er s crew of th e d ef lecti on yoke .
Fi x the 6 magn ets with g lue.

(FRO NT VIEW )

GREEN

RED

BLUE

BLUE

GREEN RED

Fig.2

BLUE

Fig.3

GREEN

RED

RED
GREEN

BLUE

BLUE

GREEN

RED

24

No. 51991

A

3

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT

C56

56 3D5623

Q95

95 8PO

ONOFFC56

56 5

1. HIGH VOLTAGE HOLD DOWN CIRCUIT

After repairing the high voltage hold down circuit shown in Fig. 1.

Thi s ci r cuit sh all b e ch ecked to op erat e co rrect ly .

2. CHECKING OF THE HIGH VOLTAG E HOLD DOWN CIRCUIT

(1) Turn the POWER SW ON.

(2) As shown in Fig. 1, set the resistor (between X con nec tor 1 & 3 ).

(3) Make sure t hat th e scr ee n pic ture disap pe ar s .

(4) Temporarily unplug the power cord.

(5) Remove the resistor (between X con nect or 1 & 3 ).

(6) Ag ai n plug th e pow er c o rd , make sure tha t th e nor m al p ict ur e is d ispl ay e d on the scr ee n.

C-N21310
C-N21103

V-N2120

WER

Ω±

Ω±

Ω±Ω±

16.7k

1

D

2

Fig. 1

1%1/4W

2 1

R562

R

X

T522

4

R561

1

D

BW

No. 51991

25

C-N21310

A

C-N21103

V-N21203

SELF CHECK FUNCTIONS

1. Outline

Th is mode l ha s se lf che ck fu nction s g i ven be l ow . W hen a malfu nction h as bee n de tect ed, th e PO WER i s tu rn ed of f and the LED flashes to

inf or m o f th e f ail ur e . The m al fu ncti on is d etecte d b y th e sign al in put stat e of t he con tr ol l in e c onnect ed to the micr ocomput er.

2. Se lf chec k i t ems

Check item Details of detection Method of detection State of m alfunction

CRT NE CK pr ot ecto r

Also det ect ed i f th e
power supply line output

from the HVT ( Hig h
voltage Transformer) has

sh ort ed w it h the g rou nd.

3. Self check indicating function

The sel f- c hec k funct ion beg i ns d ete ction ab out 5 sec on ds af ter

power is supplied.
In th e even t a malfu nc ti o n is detecte d, th e power is cu t off

immediately.
At this t ime, the ON-TIM ER LE D flash es to in form of th e

malfunction.

[ON-TIMER LED indi cation]

The ON-TI MER LED f lashes at 0.5 sec on ds int er v als.

When the ver tic al circu i t S-

correction capacitor C427
is sho rt ed, det ect th e

potential drop of the C427,
an d p r ev en t t he burn

damage to the CRT NEC K.

(Gr oun di ng of sh or ti n g of

the power supply output
from th e HVT to the ver tical

ci rcu it, an d the smal l sign al
power supply is als o

d etect ed.)

The micr oc omput er d etect s at

1 s econd in ter vals.

If NG is de tect ed f or more than

1 ms, a malfunction is interpreted.

POWER
Suppli ed

After about
5 seconds

Start of
detection

When a mal fu nctio n ha s been

d etect ed, th e PO W ER is tu rned
off . W h ile t he POW ER i s b ei ng

turn ed of f , th e power key of the
remote controller is not operational

un ti l th e p ower c od e is ta ken out
and put in again.

Malf un ct io n
is detected

POWER OFF

Flashing
ON-TIMER LED

26

No. 51991