JVC AV-29RS Schematic

A

SERVICE MANUAL

COLOUR TELEVISION

AV-29RS

V-29RS

BASIC CHASSIS

JK

CONTENTS

SPECIFICATIONS

!

★

OPERATING INSTRUCTIONS (APPENDIX)
SAFETY PRECAUTIONS

!

FEATURES

!

FUNCTIONS

!

SPECIFIC SERVICE INSTRUCTIONS

!

SERVICE ADJUSTMENTS

!

★

STANDARD CIRCUIT DIAGRAM (APPENDIX)
PARTS LIST

!

1

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COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.

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1-1

3
4
5
6

12

2-1

33

No.51730

Jul. 2000

A

V-29RS

(

)

SPECIFICATIONS

Item CONTENTS

Dimensions ( W
Mass
TV RF System
Colour System
Stereo System
Teletext System

××××H××××

D )

887mm×719mm×620mm

50.0kg
B, G, I, D, K, K1, M
PAL, SECAM, NTSC3.58, NTSC4.43
A2 / NICAM (B/G, I, D/K) system
FLOF (Fastext), WST (World standard system)

Receiving Frequency

VHF(L)
VHF (H)
UHF
CATV

46.25MHz～168.25MHz

175.25MHz～463.25MHz

471.25MHz ～ 863.25MHz
Mid(X-Z, S1-S10), Super(S11-S20), Hyper(S21-S41) bands receivable

Intermediate Frequency

VIF Carrier
SIF Carrier

38.0MHz

33.5M Hz(4.5MHz), 32.5MHz(5.5MHz), 32.0MHz (6.0MHz ), 31.5M Hz(6.5M Hz)

Colour Sub Carrier Frequency

PAL
SECAM

NTSC
Power Input
Power Consumption
Picture Tube

High Voltage
Speaker & Audio Output

4.43MHz

4.40625MHz, 4.25MHz

3.58MHz / 4.43MHz
AC 110V～240V , 50/60Hz
193W ( Max) / 137W( Avg)
Visible size : 68cm measured diagonally

32.0kV±1.5kV (at zero beam current)
Open dome speaker

10W+10W, 10cm round×2

Video Audio Input ter min al s
Video1

Video2

Video3

Video4
Front terminal

S-Video

Video
Audio(L/R)
Video
Audio(L/R)
Video/Y

Cb
Cr
Audio(L/R)

S-Video

Video
Audio(L/R)

Y : 1V
C : 0.286V

1V

positive (Negative sync provided, when terminated with 75Ω)

(p-p)

(Burst signal, when terminated with 75Ω)

(p-p)

75Ω(RCA pin jack)

(p-p)

500mV(rms) (-4dBs), High impedance (RCA pin jack)
1V

75Ω(RCA pin jack)

(p-p)

500mV(rms) (-4dBs), High Impedance (RCA pin jack)
V : Composite video 1V

Y : Compon ent vid eo 1V

75Ω(RCA pin j ac k)

(p-p)

(p-p)

Compon ent video B- Y 0. 7V
Compon ent video R- Y 0.7 V
500mV(rms) (-4dBs), High Impedance (RCA pin jack)
Y : 1V

C : 0.286V
1V

positive (Negative sync provided, when terminated with 75Ω)

(p-p)

(Burst signal, when terminated with 75Ω)

(p-p)

75Ω(RCA pin jack)

(p-p)

500mV(rms) (-4dBs), High impedance (RCA pin jack)

Video Audio Output term in al

75Ω(RCA pin jack)

1V

Video

Audio(L/R)
Aerial Input Term
Headphone jack
AV Compu Link terminal
Remote Control Unit

(p-p)

500mV(rms) (-4dBs), High Impedance (RCA pin jack)
75Ωunbalanced, Coaxial
Stereo mini jack (φ3.5mm )
AV Compu LinkⅡ, mini jack (φ3.5mm )
RM-C112 (AAA/R03 dry battery×2)

Design & specifications are subject to change without notice.

75Ω(RCA pin j ac k)

75Ω(RCA pin jack)

(p-p)

75Ω(RCA pin jack)

(p-p)

2

No.51730

A

SAFETY PRECAUTIONS

V-29RS

1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original
circuits. Service should be performed by qualified personnel
only.

2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the
manuf act urer's warr an t y and wil l fur t h er reli ev e the manufacturer
of responsi bility f or person al injury or pr operty dam age res ulting
therefrom.

3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident f rom visual i nspection nor can t he protect ion
afford ed by them n ecess arily be obt ained by using rep lacem ent
compon ents rated f or higher voltag e, watt ag e, etc. R epl acem ent
parts which have these special safety characteristics are
identified in the parts list of Service manual.

compon ents hav in g su ch feat ures are id entif ied by s hadin g
on the sche matics and by (

The us e of a subst itute replacement w hich does not

manual.

have the same safety characteristics as the recommended
replac ement part shown i n the p arts list of S ervic e manu al may
cause shock, fire, or other hazards.

) on the parts list in Service

!!!!

Electrical

4.

Don't short b etween the LIV E side groun d and ISOLATED
(NEUTRAL) side ground or EARTH side ground when
repairing.

Some model's power circuit is partly different in the GND. The
difference of the GND is show n b y th e LIVE : (") side GND, the
ISOLATED(NEUTRAL ) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never meas ure with a measuri ng apparatus (osc illoscope etc .)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above not e wi ll n ot be kept, a fus e or an y part s will be broken.

5. If any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (See
ADJUSTMENT OF B1 POWER SUPPLY).

6. The hig h voltage app lied t o the picture t ube must c onform wit h
that specified in Service manual. Excessive high voltage can
cause an increase in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltag e conditions s hould b e kept to a mi nimum, or sh ould be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect install ation, cracked or melted high voltag e harness,
poor solderi ng, etc.). To maintain the pr oper minimum level of
soft X-Ray emission, components in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manufacturer of the complete
product.

7. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the
picture tube before attempting meter connection, by connecting
a clip l ead to th e g roun d fr am e and c on necti ng t h e oth er end of
the lead through a 10k! 2W resistor t o the an ode button.

8. W hen servic e is requir ed, obser ve the origin al lead dress . Extr a
precaut ion shou ld be gi ven to assure c orrect l ead dr ess in t he
high voltage circuit area. Where a short circuit has occurred,
those comp onents that in dicat e evidenc e of over heating should
be replaced. Always use the manufacturer's replacement
components.

9.

Isolation Check
(Saf ety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
termin als , vid eo/ au dio input an d output term in als , C on trol knobs,
metal cabinet, screw"heads, ear phone jac k, control shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.

(1)

Dielectric Stren gth Test

The isol ation b etween th e AC pr imar y circuit and all metal parts
expos ed t o th e user, p ar tic u larly any expo sed metal part h avi ng a
return p ath to the chassis should withst and a voltage of 3000V
AC (r.m.s .) for a period of one secon d.

(. . . . W ithstand a voltag e of 1100 V AC ( r.m.s.) to an applianc e

rated up t o 120V, and 3000 V AC (r. m.s.) t o an appl iance r ated
200V or mor e, f or a peri od of on e s ec on d.)
This method of test requires a test equipment not generally found
in the service trade.

(2)

Leak age Current Check

Plug the AC lin e c or d dir ec t l y int o t he AC outlet ( d o not use a line
isolation transformer during this check.). Using a "Leakage
Current Tester", measure the leakage current from each exposed
metal part of the cabinet, particularly any exposed metal part
having a return path to the chassis, to a known good earth
ground ( water pipe, etc. ). An y leak age c urr ent mus t not exceed

0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).

Alternate Check Method

""""

Plug the AC lin e c or d dir ec t l y int o t he AC outlet ( d o not use a line
isolati on transform er during t his check. ). Use an AC voltmet er
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1 500! 10W resistor paralleled by a 0.15#F
AC-typ e capacitor betw een an expos ed metal part and a know n
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connect ion t o each exp os ed met al p art, part icul arl y any exp osed
metal part h avin g a return p ath to th e chassis , and meas ure th e
AC voltag e across the res istor. N ow, re vers e the plug in the AC
outlet and repeat each measurement. Any voltage measured
must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
However , i n t ropical area, this must n ot exceed 0.3 V AC (r.m.s. ).
This corresponds to 0.2mA AC (r.m.s.).

0.15μF AC-TYPE

1500

GOOD EARTH GROUND

!

AC VOLTMETER
(HAVING 1000
OR MORE SENSITIVITY)

10W

!

/V,

PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

No.51730

3

A

V-29RS

FEATURES

By preference, us ers can selec t the picture siz e from REG ULA R,

"

ZOOM, 16:9 modes.

The TELETEXT SYSTEM has a built-in FASTEXT and WST

"

system.

B ecause this TV uni t corresp onds t o multipl ex broadc ast, us ers

"

can enjo y music pr ograms an d spor ting ev ents wit h live real ism.
In additi on, BILINGUAL programs c an be heard in their original
language.

Users c an m ake fun to c onnect th e Dig ital V ideo D isk p layer b y

"

using the component video signal input terminal.

I2C BUS CONTROL SYSTEM CHART

TU1001

TU1001

TUNER

TUNER

IC1301

IC1301

VIDEO

VIDEO

CHROMA

CHROMA

Built-in ECO (ECONOMY, ECOLOGY) MODE.

"

In accordance with the brightness in a room, the brightness
and/or contrast of the picture can be adjusted automatically to
make th e opti mu m picture wh ic h is eas y on the eye.

2

C Bus controls the many ICs which have various functions each

I

"

other.

IC1501

IC1501

DEF CTRL

DEF CTRL

IC1201

IC1201

SRT

SRT

IC8801

IC8801

LED CTRL

LED CTRL

IC1701

IC1701

MICRO

MICRO

COMPUTER

COMPUTER

SCL3 / SDA3

SCL1 / SDA1

SCL2 / SDA2

MEMORY

IC1702

IC1702

MEMORY

IC301 [0S]

IC301 [0S]

DIGI COMB

DIGI COMB

IC101 [0S]

IC101 [0S]

AV SW

AV SW

4

No.51730

A

FUNCTIONS

V-29RS

Headphone jack

①

Video-4 terminal

②

OK

③

Channel -/+ (MENUUP/DOW N)

④

Volume -/+ (MENULEFT/RIGHT)

⑤

TV/VIDEO

⑥

AUTO VNR

⑦

ECO

⑧

ON TIMER

⑨

BBE

⑩

Video-1 terminal (S,V,L,R)

①

Video-2 terminal (V,L,R)

②

Video-3 terminal (V/Y,Cb,Cr,L,R)

③

Output terminal (V,L,R)

④

AV COMPULINK terminal

⑤

Aerial socket

⑥

POWER

①

TELETEXT

②

COLOUR

③

TV/VIDEO

④

DISPLAY

⑤

ZOOM

⑥

MENU UP/DOWN

⑦

MENU LEFT/RIGHT

⑧

OK

⑨

AUTO VNR

⑩

AAC

⑪

PICTURE MODE

⑫

SPATIALIZER

⑬

CHANNEL

⑭

CHANNEL SCAN

⑮

CHANNEL +/-

⑯

VOLUME +/-

⑰

MUTING

18

⑱

POWER

⑪

ECO sensor

⑫

Remote control sensor

⑬

Main POWER SW

⑭

Dancing LED

⑮

No.51730

5

A

V-29RS

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Disconnect the power plug from wall outlet.

2. As shown in the Fig.2, remove the

3. Withdraw the rear cover toward you.

screws marke d

16

AAAA

.

CHECKING THE PW BOARD

To check the PW Board from back side.

1. Pull out the chassis (refer to REMOVING THE CHASSIS).

2. Erect the ch assis ver tic all y s o that you c an easi ly c hec k th e bac k
side of the PW Board.

REMOVING THE CHASSIS

After remo ving the rear cover.

"

1. Slightly raise the both sides of the chassis by hand and remove the
two claws under the both sides of the chassis from the front
cabinet.

2. Withdraw the chassis backward.

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

REMOVING THE AV TERMINAL BOARD

After remo ving the rear cover.

"

1. As shown in Fig.2, remove the

2. Then remove the AV TERMINAL BOARD.

screws marke d

5

BBBB

.

REMOVING THE SPEAKER BOX

After remo ving the rear cover.

"

1. As s hown in Fig. 2, removi ng the
remove the speaker box.

2. Follow the same steps when removing the other hand speaker
box.

When removing the screws marked

NOTE :

remove the lower s ide screw f irst, and th en remove the
upper one.

screws marked

2

of the speaker box,

CCCC

CCCC

then

,

CAUTION

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

"

co n tacting w ith oth e r PW Bo ard.

Before turning on power, make sure that the wire connector is

"

properly connected.

When conducting a check with power supplied, be sure to

"

confirm that the CRT EARTH WIRE (BRAIDED ASS
connected to the CRT SOCKET PW board.

’’’’

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together.
Should it b e inadvertently remov ed, be sure t o tie the wires wit h a
new cable tie.

Y) is

REMOVING THE CONTROL BASE

After removing the cha ssis.

"

1. As shown in Fig.1, while pushing down the claws marked
remove the CONTROL BASE in the arrow direction

6

FFFF

.

,

EEEE

No.51730

FFFF

CONTROL BASE

EEEE

CLAW

CHASSIS

Fig. 1

A

FRONT CABINET

(

)

CRT

FRONT CONTROL
PWB

2/2

V-29RS

CCCC

SPEAKER BOX

POWER

DEF P WB

CRT SOCKET PWB

FRONT CONTROL
PWB(1/2)

SPEAKER BOX

CCCC

CLAW

HVT

CHASSIS
BASE

Fig.1

CLAW

MAIN PWB

AV SEL. PWB

BBBB

AV TERMINAL

BOARD

POWER CORD

REAR COVER

AAAA

Fig.2

No.51730

7

A

V-29RS

A

A
A

A

A

REMOVING THE CRT

Replacement of the CRT should be performed by 2 or more

"

persons.

After removing the cover, chassis etc.,

"

1. Putting the CRT change table on soft cloth, the CRT change table

should also be covered with such soft cloth (shown in Fig.3).

2. While keeping the surface of CRT down, mount the TV set on the

CRT change table balanced will as shown in Fig.3.

3. Remo ve 4 sc r ews m ark ed by arr ows w ith a box type sc rew driver

as shown in Fig.4.

Sinc e the cabin et wi ll dr op wh en sc r ews h ave b een r em oved , b e

"

sure to support the cabinet with hands.

4. After 4 sc rews have been r emoved, p ut the cabin et slowly on

cloth (At this time, be carefully so as not to damage the front
surface of the cabinet) shown in Fig.5.

The CRT should be assembled according to the opposite

"

sequence of its dism oun ting steps.

The CRT c h ang e table s h oul d prefer ab l y b e s m aller th at th e C R T

"

surfac e, and its height b e about 35cm.

CRT CHANGE TABLE

PPROX.

35cm

CLOTH

Fig. 3

CRT

CRT
CHANGE
TABLE

BOX
TYPE
SCREW
DRIVER

COATING OF SILICON GREASE FOR ELECTRICAL
INSULATION ON THE CRT ANODE CAP SECTION.

Subseq uent to r eplacem ent of th e CRT and HV tr ansf ormer or
repair of the anode cap, etc. by dismounting them, be sure t o
coat silicon grease for electrical insul ati on as sh ow n in Fig.6.
Wipe around the anode button with clean and dry cloth. (Fig.6)
Coat silic on greas e on the secti on around th e anode butt on. At
this tim e, t ake c are s o th at any s ilic on gr eases dos e n ot stic k t o
the anode button. (Fig.7)

Silicon grease product No. KS - 650N

CRT

node button

Silicon gr ease

coating

CABINET

pprox.
20mm (Do not
coat grease on
this section

node button
(No sticking of
silicon grease)

Fig. 4

CRT

CRT
CHANGE TABLE

Fig. 5

Silicon gr ease
should b e c oat ed
by 5mm or more
from the outside
diamet er of
anode cap.

Coating position
of silicon grease

node cap

Fig. 6 Fig. 7

8

No. 51730

A

REPLACEMENT OF MEMORY ICs

UP/DO

1. Memory ICs

This model uses memory ICs. This memory IC data are for proper
operation of the video and deflection circuits. When replacing, be sure to
use ICs written with the initial values of data.

2. Procedure for replacing memory ICs

(1)

Power off

Switch off th e pow er an d dis connect the power plug from the wall out let .

V-29RS

(2)

Replace the memory IC

Be sure to u se memo ry ICs written with the i nitial data values.

(3)

Power on

Connect the power plu g int o the wall outl et an d s wi tc h power on.

(4)

Check and set SYSTEM CONSTANT SET

It must not adjust without signal.

1) Press the

DISPLAY

key and the

PICTURE MODE

key of the REMOTE

CONTROL UNIT simultaneously.

2) T he SERVICE MENU screen of Fig . 1 will be display ed.

3) While the S ERVICE MENU is displ ayed, again press the

PICTURE MODE

key simultaneously, and the SYSTEM CONSTANT SET

DISPLAY

screen of Fi g. 2 will be displa yed .

4) Ch eck the setting val u es of th e SYSTE M CO NSTAN T SE T of Table 1 i n p age
later. If th e value is dif ferent, select the setting it em with th e
key, and set the correct value with the

MENU LEFT/RIGHT

MENU UP/DOWN

key.

5) Press the OK key to memorize the setting value.

6) Press the

(5)

Receive channel s ett in g

DISPLAY

key twice, and return to the normal screen.

Refer to the OPERATING INSTRUCTIONS, and set the receive channels as
described.

(6)

User setti n gs

Check the user setting items according to Table 2. Where these do not agree, refer
to the OPERATING INSTRUCTIONS.

(7)

SERVICE MENU setting

Verif y what to s ee in th e SERVICE MEN U, an d s et wh at e ver in nec es sary.

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

key and

SERVICE MENU

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. WB PRESET

7. AUTO PROGRAM (OFF)

1-7 : SELECT DISP : EXIT

M

*******-**** V*.**P

JVC JK BASIC V

**

Fig.1

SYSTEM CONSTANT SET 1/3

COLOUR : MULTI
MSP : YES
SUPER BASS : NO
CENTER SPEAKER : NO
TEXT : YES

:SEL -/+:OPE DISP:EXIT

SYSTEM CONSTANT(1/3)

SYSTEM CONSTANT SET 2/3

BLUE BACK MUTE : NO
VOLUME LIMIT : YES
COLOUR AUTO : NO
TILT : YES
C-TRAP : 1

OK

MENU

LEFT/RIGHT

PICTURE

MODE

MENU

WN

DISPLAY

No. 51730

:SEL -/+:OPE DISP:EXIT

SYSTEM CONSTANT(2/3)

SYSTEM CONSTANT SET 3/3

E.M.C : NO
N/S WHITE BACK : NO
7 LED SPEED : 100

:SEL -/+:OPE DISP:EXIT

SYSTEM CONSTANT(3/3)

Fig.2

9

A

V-29RS

INITIAL SETTING VALUES OF SYSTEM CONSTANT SET (TABLE 1)

CONTENTS VARIABL E RANGE INI TIAL SETTING VALUE

COLOUR

MSP

SUPER BASS

CENTER SPEAKER

TEXT

BLUE BACK MUTE

VOLUME L IMIT

COLOUR AUTO

TILT

C-TRAP

E.M.C

N/S WHITE BACK

7 LED SPEED

MULTI TRIPLE PAL

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

1 0

YES NO

YES NO

00 10 20 1250 1260 1270

……

MULTI

YES

NO

NO

YES

NO

YES

NO

YES

1

NO

NO

100

USER SETTING CONDITIONS (TABLE2)

PICTUIRE SETTING FEATURES

CONTRAST
BRIGHT
SHARP
COLOUR
TINT
WHITE BALANCE

A.A.C
AUTO VNR
COLOUR SYSTEM

ZOOM
ECO SENSER
PICTURE TILT

STEREO /
BASS
TREBLE
BALANCE
AI VOLUME
BBE
SPATIALIZER

Ⅰ・Ⅱ

PICTURE FEATURES

SOUND SETTING

CENTER

COOL

ON
AUTO
TV : According to preset CH
VIDEO : AUTO
REGULAR
ACTIVE
CENTER

CENTER

ON
ON
ON

SLEEP TIMER
ON TIMER
BLUE BACK
CHILD LOCK
CHANNEL GUARD
AUTO SHUT OFF
VIDEO-3 SETTING

LANGUAGE
AUTO PROGRAM
EDIT / MANUAL

DEMO OFF

OFF

ON
OFF

OFF
VIDEO

INSTALL

ENGLISH

PRESET CH only
Others : blank

DEMO

10

No. 51730

A

SERVICE MENU SETING I TEMS ( TABLE 3)

Setting item Setting value Setting item Setting value

V-29RS

1. IF VCO 4. DEF

2. V / C

1. CUT OFF (R, G, B)

2. DRIVE ( R, B)

3. BRIGHT

4. CONT.

5. COLOUR

6. TINT

7. BLACK OFFSET (R-Y, B-Y)

8. SHARP

5. VSM PRESET
BRIGHT
STANDARD
NORMAL

1. V-SHIFT

2. V-SIZE

3. SUBTITLE

4. H-CENT

5. H-SIZE

6. EW- PIN

7. TRAPEZ

8. EW. COR. L

9. EW. COR. H

10. V. S-COR

11. V-LIN

12. H-BLK-R

13. H-BLK-L

14. V-EHT

15. H-EHT

16. EHT-G AIN

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5. TINT

1. AUDIO

(Do not adjust)

1. ERROR LIMIT

2. A2 ID THR

3. BASS

4. TREBLE

6. WB PRESET

COOL
MID
WARM

7. AUTO PROGRAM

(Do not adjust)

No. 51730

1. R DRIVE

2. B DRIVE

ON / OFF

11

A

V-29RS

REPLACEMENT OF CHIP COMPONENT

CAUTIONS

!

1. Avoid heating for more than 3 seconds.

2. Do not rub the electrodes and the resist parts of the pattern.

3. When removing a chip part, melt the solder adequately.

4. Do not reuse a chip p art aft er rem oving it.

SOLDERING IRON

!

1. Use a high insulati on soldering iron with a thin p ointed end of it.

2. A 30w soldering iron is recommended for easily removing parts.

REPLACEMEN T STEPS

!

How to remove Chip parts

1.
Resistors, capacitors, etc

####

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at eac h end.

(2) S hif t wi th tweezers an d rem o ve t h e ch ip p ar t.

Transistors, diodes, variable resistors, etc

####

(1) Apply extra solder to each lead.

SOLDER

SOLDER

2. How t o i nst al l Chip p arts

Resistors, capacitors, etc

####

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp th e chip part with tw eezers and pl ace it on th e sold er.

Then heat an d m elt t h e s old er at b oth en ds of th e chip part .

Transistors, diodes, variable resistors, etc

####

(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the solder.
(3) First solder lead

as indicated in the figure.

A

A

(2) As shown in the figure, push the part with tweezers and

alternat el y melt t he s old er at each lead . Shif t and r emov e th e
chip part.

Note : After removing the part, remove remaining solder from the

pattern.

12

No. 51730

(4) Then solder leads

and C.

B

C

A

C

B

B

A

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1.

There are 2 ways of adjusting this TV: One is with the
REMOTE CONTRO L UNIT and t he oth er is t he conv ention al
method using adjustment pa rts and components.

2.

The adjustment with the REMOTE CONTROL UNIT is made
on the basis of the init ial sett ing valu es . The set tin g val ue s
which adjust the screen t o it s o pt i mum cond ition may differ
from the initial setting values.

3. Make sure that connection is correctly made to AC power
source.

4. Turn on the p ower of the set and eq uipment before use, and
start the adjustment procedures after waiting at least 30 minutes.

5. Unl ess other wis e specifi ed, prep are the mos t suitab le rec eption
or input signal for adjustment.

6. Never touc h any adjus tm ent par ts, whic h are not spec ifi ed in the
list for this adjustment variable resistors, transforms, condensers,
etc.

7. Preparation for adjustment (presetting)
Unless oth erwise sp ecified in t he adjust ment items , preset t he
following functions with the REMOTE CONTROL UNIT.

User mode set ting condition

PICTURE MODE (VSM) STANDARD
WHITE BALANCE MID
ZOOM REGULAR
CONTRAST CENTER
BRIGHT CENTER
SHARP CENTER
COLOUR CENTER
A.A.C OFF
AUTO VNR OFF
PICTURE TILT CENTER
BLUE BACK O FF
AUTO SHUTOFF OFF
ECO SENSOR OFF
AI VOLUME OFF
BBE OFF
SLEEP TIMER OFF
BALANCE CENTER
SPATIALIZER OFF

V-29RS

MEASURING INSTRUMENT AND FIXTURES

1. DC voltme t er (or digital voltmeter)

2. Oscilloscope

3. Signal ge nerator (Pattern genera tor) [PAL / SECAM / NTSC]

4. Remote control unit

ADJUSTMENT CONTENTS

CHECK OF B1 POWER SURPLY

●

CHECK OF HIGH VOLTAGE

●

FOCUS ADJUSTMENT

●

CHECK OF IF CIRCUIT

●

SETTING OF VSM PRESET

●

SETTING OF WHITE BALANCE PRESET

●

VIDEO / CHROMA CIRCUIT ADJUSTMENT

●

DEFLECTION CIRCUIT ADJUSTMENT

●

AUDIO CIRCUIT ADJUSTMENT

●

PURITY, CONVERGENCE ADJUSTMENT

●

[Do not adjust]

No. 51730

13

A

V-29RS

UP/DO

BASIC OPERATION OF SERVICE MENU

1. The adjustment using SERVICE MENU

The followi ng adjustm ent items us e the SERVICE ME NU in the seri es of the adjust ment. The adjus tments are made on the basis of the
initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values.
With the SERVICE NEMU, various settings can be made, and they are broadly classified in the following items of settings.

IF

･････････････････････････

V/C

･･･････････････････････

AUDIO

････････････････････

DEF

･･･････････････････････

VSM PRESET

WB PRESET
AUTO PROGRAM

･･････････････

･･･････････････

･･･････････

Adjustment of the IF circuits.
Adjustment of the VIDEO/CHROMA circuit.
Adjustment o f the sound circuit

[Do not ad just]

.

Adjustm en t of th e DEFLECTIO N circ u it f or eac h aspect mod e gi ven below

REGULAR (50/60Hz)
ZOOM (50/60Hz)

16:9 (50/60Hz)
Adjustm en t of th e initial setting values of VS M c on dition as BRIG H T , ST AN D AR D an d S O FT .
(VSM : Video Status Memory)
Adjustment of the initial setting value of WHITE BALANCE PRESET values as COOL, MID and WARM.
By turning the power switch on, you can get the state of AUTO PROGRAM

[Do not adjust ]

.

2. Key operation of the SERVICE MENU
[Enter to SERVICE MENU]

Press the

DISPLAY

key and th e

PICTURE M ODE

key of the REMOTE CONTROL

UNIT simultaneously. Then enter the SERVICE MENU mode as shown in Fig.1.

[Exit from SERVICE MENU]

When c omplet e the ad just ment work, pr ess th e
SERVICE MENU. And then press the

DISPLAY

DISPLAY

key to return to the main

key again, return to the normal

screen.

[Select the SUB MENU from MAIN MENU]

In main SERVICE MENU, press the 1～7 key of the remote control unit, to select any
of the adjustment items.

The colours which selected item characters are changed.

[Method of setting]

1. IF

[VCO]

1 Key

①
②
③

･･････････

The VCO (CW) screen will be displayed.
DISPLAY Key

Selec t

As you press t his k ey, y ou w il l r eturn to the

･･･

1.IF

.

SERVICE MENU

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

OK

MENU

LEFT/RIGHT

MENU

WN

DISPLAY

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. WB PRESET

7. AUTO PROGRAM (OFF)

.

SUB MENU 1.IF(VCO)

VCO (CW)

TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW

SERVICE MENU

SERVICE MENU

SERVICE MENU

1-7 : SELECT DISP : EXIT

M

*******-**** V*.**P

JVC JK BASIC V

**

Fig.1

**....**

**

****

****

MHz

**

14

DISP: EXIT

PICTURE

MODE

No. 51730

A

V-29RS

2.V/C, 4.DEF, 5.VSM PRESET

2, 4, 5, 6 Key

①

MENU UP/DOWN Key

②

MENU LEFT/RIGHT

③

OK Key

④

DISPLAY Key

⑤

･･････････････････

･･････････

････････････

･･･････････････････････

･･････････････････

SUB MENU 2.V/C

V/C 50Hz PAL

1. CUT OFF (R)

- + : OPERATE DISP : EXI T

(G)
(B)

:SELECT

- **

- **

- **

SUB MENU 5.VSM PRESET

VSM PRESET

STANDARD

and

6.WB PRESET

Select on e from
Select setting items.
Set (adjust) the setting values of the setting items.
Memorize the setting value.
(Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key -

if you do, the values will not be stored in memory.)
Return to the

2. V/C, 4. DEF, 5. VSM PRESET

SERVICE MENU

screen.

SUB MENU 4.DEF

**

**

DEF

- + : OPERATE DISP : EXIT

Hz

****

1. V-SHIFT

:SELECT

***

(**)

SUB MENU 6.WB PRESET

WB PRESET

MID

and

6.WB PRESET

.

1.BRIGHT

:SELECT

- + : OPERATE DISP : EXIT

3.AUDIO

and

(Do not adjust)

3.AUDIO

7.AUTO PROGRAM

***

7.AUT O PR OGRAM

(Do not adjust)

SUB MENU 3.AUDIO

AUDIO

1. ERROR LIMIT
C_AD_BITS = 00000000

:SELECT

- + : OPERATE DISP : EXIT

･････････････････

････････

***

H

1.R DRIVE

:SELECT

- + : OPERATE DISP : EXI T

***

It is no requirement to adjustmen t.
AUTO PROGRAM contents displays on the screen. Need not for service.

No. 51730

15

A

V-29RS

(

)

(

)

)

SERVICE MENU FLOW CHART

SERVICE MENU

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. WB PRESET

7. AUTO PROGRAM (OFF)

1-7 : SELECT DISP : EXIT

M

*******-**** V*.**P

JVC JK BASIC V

**

7.AUTO PROGRAM (OFF

VSM PRESET STANDARD

BRIGHT
STANDARD
SOFT

1. BRIGHT

2. CONT.

3. COLOUR

4. SHARP

5. TINT

COOL
MID
WARM

1. R DRIVE

2. B DRIVE

- + : OPERATE DISP : EXIT

- + : OPERATE DISP : EXIT

SUB MENU 1. IF

ON/OFF

TOGGLE SWITCH

VCO (CW)

TOO HIGH
ABOVE RE FE RE NCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW

**

** ....**

**

****

****

DISP: EXIT

SUB MENU 5. VSM PRESET SUB MENU 2. V/ C

V/C 50Hz PAL

1.BRIGHT

:SELECT

***

SUB MENU 6. WB PRESET

WB PRESET MID

1.R DRIVE

:SELECT

***

1. CUT OFF (R)

- + : OPERATE DISP : EXIT

:SELECT

(G)
(B)

SUB MENU 3. AUDIO

AUDIO

1. ERROR LIMIT
C_AD_BITS = 00000000

:SELECT

- + : OPERATE DISP : EXIT

VCO

MHz

- **

- **

- **

Do not adjust

H

***

1. CUT OFF

2. DRIVE

3. BRIGHT

4. CONT.

5. COLOUR

6. HUE

7. BLACK OFFSET

8. SHARP

9. PURITY

1. CONC LIMIT

2. A2 ID THR

4. BASS

5. TREBLE

1. V-SHIFT

2. V-SIZE

SUB MENU 4. DEF

DEF

Hz

**

**

****

1. V-SHIFT

:SELECT

- + : OPERATE DISP : EXIT

16

No. 51730

***

(**)

3. SUBTITLE

4. H-CENT

5. H-SIZE

6. EW -PIN

7. TRAPEZ

8. EW .CO R.L

9. EW .CO R.H

10. V.S-COR

11. V-LIN

12. H-BLK-R

13. H-BLK-L

14. V-EHT

15. H-EHT

16. EHT-GAIN

A

ADJUSTMENT LOCATIONS

)

(

)

V-29RS

FRONT

POWER

F901

FRONT CO NTROL PW B (1/2)

SW

W

PW

FRONT

CN002

MAIN PWB POWER&DEF PWB

CN001

AV SEL. PWB

CN006

CN001

MEMORY

IC702

IC701

FRONT CO NTROL PW B (2/2)

CN002

F

W DEG

1PIN : B1(TP-91
2PIN : NC
3PIN : NC
4PIN : NC
5PIN : GND

FRONT

CN013

FRONT

TUNER

CRT SOCKET PWB

(SOLDER SIDE)

CN008

TP-E

IC301

CN008

FOCUS

E1

CN009

TOP

CN009

CRT EARTH

BRAIDED WIRE

HV

1

5

X

FOCUS1

SCREEN1

No. 51730

17

A

V-29RS

ADJUSTMENTS

CHECK ITEMS BEFORE ADJUSTMENTS

Item

Check of B 1
Power Supply

Measuring
instrument

Signal
generator

DC voltmeter

Test point Adjustment part Description

TP-91(B1)
TP-E(

)

####

[X Connector
on POWER
DEF P WB]

1. Input the bl ac k an d wh it e si gn al.

2. Select 2. V/C from the SERVICE MENU.

3. Select 1. CUT OFF with MENU UP / DOWN key.

4. Show one hori z ontal line by pressing th e 1 key.

5. Turn the SCREEN VR until not to display the one horizontal line.

6. Connect the DC voltmeter to TP-91(B1) and TP-E(#).

7. Make sure that the voltage is DC134.0 ±2.0V.

8. Readjust the SCREEN VR to app ear the hori zontal lin e faintl y,
and cancel the horiz on t al line by pressi ng th e 2 k ey.

Check of Hi gh
Voltage

Signal
generator

High voltage
meter

FOCUS ADJUS TMENT

Item

Adjustment of
FOCUS

Measuring
instrument

Signal
generator

CRT anode

Test point Adjustment part Description

FOCU S 1 [In FBT]

FOCUS 2
[CRT SOCKET PWB]

1. Input t h e bl ac k an d wh it e si gnal.

2. Select 2. V/C from the SERVICE MENU.

3. Select 1. CUT OFF with MENU UP / DOWN key.

4. Show on e hor i z ont al line by press in g the 1 key.

5. Turn the SCREEN VR until not to display the one horizontal line.

6. Connect a High voltage meter to CRT ANODE.

7. Make sure that the voltage is DC 32.0kV±1.5kV.

8. Readjust the SC REEN VR to app ear th e horiz ontal line faintl y,

and cancel the horizontal line by pressing 2 key.

1. Input the cross-hatch signal.

2. By turni ng the FOCU S 1 VR, ad just the pic ture s o that th e 7th

horizontal line from the upper side of the cross-hatch picture
becomes thinnest.

3. By turni ng the FOCU S 2 VR, ad just the pic ture s o that th e 7th

vertical line from the left side may become uniform at the line
center and its p er ip h ery.

4. Carry out adjus tment by repeating the steps 2 and 3 ab ov e.

5. Make sure t h at when t h e sc r een is darkened, the lines remain i n

good focus.

FOCUS 2

FOCUS 1

18

No. 51730

A

CHECK OF IF CIRCUIT

V-29RS

Item

Adjustment of
VCO

Measuring
instrument

Remote
control unit

VCO (CW)

TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW

**

**....**

****

SETTING OF VSM PRESET

Item

Setting of
VSM PRESET

Measuring
instrument

Remote
control unit

Test point Adjustment part Descrip tion

Under normal conditions, it is no adjustment required.

1.IF

MHz

**

****

YELLOW

: EXIT

Test point Adjustment part Description

5.VSM PRESET

1. BRIGHT

2. CONT.

3. COLOUR

4. SHARP

5. TINT

"

It must not adjus t w ith ou t br oadcast sig n al.

"

1. Selec t 1.IF f rom the S ERVICE MENU, then dis plays t he VCO
adjustment screen.

2. Check the characters colour of the JUST REFERENCE
displayed to yellow.

1. Select 5.VSM PRESET from the SERVICE MENU.

2. Select PICTURE MODE to BRIGHT in the user setting MENU.

3. Adjust the MENU UP/DOWN and -LEFT/RIGHT key to bring the
set valu es of 1.BR IGHT～5. TINT to the values shown in the
table.

4. Press the OK key and memorize the set value.

5. Respectively select the PICTURE MODE to STANDARD and
SOFT, and m ak e si milar sett in g as in 3 abo ve.

6. Press the OK key and memorize the set value.

[INITIAL SETTING VALUES OF VSM PRESET]

PICTURE MODE

ITEM

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5. TINT

BRIGHT STANDARD SOFT

+0 +0 +0

+17 +0 -4

+0 +0 -1

+0 +0 -3

+0 +0 +0

No. 51730

19