JVC LT-20B60SU Service Manual

SERVICE MANUAL

LCD PANEL TELEVISION

YA30320058

LT-20B60SU,
LT-20B60SJ

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.YA303

2005/8

SPECIFICATION

Items Contents

Dimensions ( W × H × D ) 64.4cm × 48.1cm × 20.0cm [Included stand]

64.4cm × 41.6cm × 8.8cm [TV only]

Mass 8.9kg [Included stand]

7.4kg [TV only]

Power Input DC12V (TV)

AC220 ~ 240V 50Hz (Adaptor)

Power Consumption 50W (Standby: 3.0W)

TV RF System CCIR (B/G, DK, I, L)

Colour System PAL / SECAM / NTSC 3.58/4.43 [EXT only]

Stereo System A2 (B/G) / NICAM (B/G, I, L)

Receiving Frequency VHF

Intermediate
Frequency

Colour Sub
Carrier Frequency

Teletext System FLOF (Fastext level 2.5), WST(World Standard system)

LCD panel 20V-inch (4 : 3)

Screen Size Diagonal : 51.1cm (H : 41.1cm × V : 30.95cm)
Display Pixels Horizontal : 800 dots × Vertical : 600 dots

Audio Power Output 5W + 5W(10% THD)

Speaker 3.3cm × 14.5cm × 2
Aerial terminal (VHF/UHF) F-type connector, 75Ω unbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2

EXT-3 (Input) S-Video

PC (RGB) Input D-sub 15pin × 1

PC AUDIO input 3.5mm stereo mini jack × 1
Audio output 500mV (rms), Low impedance, RCA pin jack × 2
Headphone 3.5mm stereo mini jack × 1
Remote Control Unit RM-C1861 (AA/R6 dry cell battery × 2)

SECAM

47 MHz - 470 MHz

UHF

470 MHz - 862 MHz

CATV

S1 - S20 / S21 - S41

VIF

38.9 MHz (B/G, I, L)

SIF

33.4 MHz (5.5MHz : B/G)

32.9 MHz (6.0MHz : I)

32.4 MHz (6.5MHz : L)

PAL

4.43 MHz

4.40625 MHz / 4.25MHz

NTSC

3.58 MHz / 4.43 MHz

TOP (German system)

Mini-DIN 4 pin × 1
Y: 1V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω

Video

1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 1

Audio

500mV (rms), High impedance, RCA pin jack × 2

R/G/B : 0.7V (p-p), 75Ω

HD / VD : 1V (p-p) to 5V (p-p), high impedance
< Available signal >

VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz)
XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)

Design & specifications are subject to change without notice.

1-2 (No.YA303)

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS [EXCEPT FOR UK]

(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 manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components

having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does

not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.

(4) Don't short between the LIVE side ground 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 shown by the 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
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.

(5) When service is required, observe the original lead dress.

Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.

(6) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.

b) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do 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.). Any
leakage current must 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 line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use

an AC voltmeter having 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor

between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse 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, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)

0.15 F AC-TYPE

GOOD EARTH GROUND

1500 10W

PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T

(No.YA303)1-3

1.2 SAFETY PRECAUTIONS [FOR UK]

(1) The design of this product contains special hardware and 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 product should not be made. Any design alterations or additions will void the

manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage
resulting therefrom.

(3) Many electrical and mechanical parts in the product have special safety-related characteristics. These characteristics are often

not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are
identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the
schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the
same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock,
fire, or other hazards.

(4) The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live parts,

high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is
required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to
normal, after re-assembling.

WARNING

(1) The equipment has been designed and manufactured to meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant safety standards.
(4) It is essential that safety critical components are replaced by approved parts.
(5) If mains voltage selector is provided, check setting for local voltage.

1-4 (No.YA303)

1.3 INSTALLATION

1.3.1 HEAT DISSIPATION

If the heat dissipation vent behind this unit is blocked, cooling
efficiency may deteriorate and temperature inside the unit will
rise. The temperature sensor that protects the unit will be
activated when internal temperature exceeds the pre-determined
level and power will be turned off automatically.Therefore,
please make sure pay attention not to block the heat dissipation
vent as well as the ventilation outlet behind the unit and ensure
that there is room for ventilation around it.

Ventilation hole

1.3.2 INSTALLATION REQUIREMENTS

Ensure that the minimal distance is maintained, as specified
below, between the unit with and the surrounding walls, as well
as the floor etc.Install the unit on stable flooring or stands.Take
precautionary measures to prevent the unit from tipping in order
to protect against accidents and earthquakes.

1.3.3 NOTES ON HANDLING

(1) WHEN TAKING UNIT OUT OF A PACKING CASE

When taking the unit out of a packing case, do not grasp
the upper part of the unit. If you take the unit out while
grasping the upper part, the LCD PANEL may be damaged
because of a pressure. Instead of grasping the upper part,
put your hands on the lower backside or sides of the unit.

(2) AS FOR PRESSING OR TOUCHING A SPEAKER

Be careful not to press the opening of the speaker in the
side part of the unit and around them since the decorative
sheet on the surface of the openings may be deformed.

100 mm

100 mm

*Diagram differs from actual appearance.

100 mm

100 mm

50 mm

(No.YA303)1-5

1.4 HANDLING LCD PANEL

1.4.1 PRECAUTIONS FOR TRANSPORTATION

When transporting the unit, pressure exerted on the internal LCD
panel due to improper handling (such as tossing and dropping)
may cause damages even when the unit is carefully packed. To
prevent accidents from occurring during transportation, pay
careful attention before delivery, such as through explaining the
handling instructions to transporters.
Ensure that the following requirements are met during
transportation, as the LCD panel of this unit is made of glass and
therefore fragile:

(1) USE A SPECIAL PACKING CASE FOR THE LCD PANEL

When transporting the LCD panel of the unit, use a special
packing case (packing materials). A special packing case
is used when a LCD panel is supplied as a service spare
part.

(2) ATTACH PROTECTION SHEET TO THE FRONT

Since the front (display part) of the panel is vulnerable,
attach the protection sheet to the front of the LCD panel
before transportation. Protection sheet is used when a LCD
panel is supplied as a service spare part.

(3) AVOID VIBRATIONS AND IMPACTS

The unit may be broken if it is toppled sideways even when
properly packed. Continuous vibration may shift the gap of
the panel, and the unit may not be able to display images
properly. Ensure that the unit is carried by at least 2
persons and pay careful attention not to exert any vibration
or impact on it.

(4) DO NOT PLACE EQUIPMENT HORIZONTALLY

Ensure that it is placed upright and not horizontally during
transportation and storage as the LCD panel is very
vulnerable to lateral impacts and may break. During
transportation, ensure that the unit is loaded along the
traveling direction of the vehicle, and avoid stacking them
on one another. For storage, ensure that they are stacked
in 2 layers or less even when placed upright.

1.4.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)

(1) Avoid placing the unit under direct sunlight over a

prolonged period of time. This may cause the optical filter
to deteriorate in quality and COLOUR.

(2) Clean the filter surface by wiping it softly and lightly with a

soft and lightly fuzz cloth (such as outing flannel).

(3) Do not use solvents such as benzene or thinner to wipe the

filter surface. This may cause the filter to deteriorate in
quality or the coating on the surface to come off. When
cleaning the filter, usually use the neutral detergent diluted
with water. When cleaning the dirty filter, use water-diluted
ethanol.

(4) Since the filter surface is fragile, do not scratch or hit it with

hard materials. Be careful enough not to touch the front
surface, especially when taking the unit out of the packing
case or during transportation.

1.4.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR
PARTS

Take note of the following when replacing exterior parts (REAR
COVER, FRONT PANEL, etc.):

(1) Do not exert pressure on the front of the LCD panel (filter

surface). It may cause irregular COLOUR.

(2) Pay careful attention not to scratch or stain the front of the

LCD panel (filter surface) with hands.

(3) When replacing exterior parts, the front (LCD panel) should

be placed facing downward. Place a mat, etc. underneath
to avoid causing scratches to the front (filter surface).

1-6 (No.YA303)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

T-V LINK

When you have a T-V LINK compatible VCR connected to the
EXT-2 Terminal on the TV,it is easier to set up the VCR and to
view videos.

ZOOM

This function can change the screen size according to the
picture aspect ratio.

2.2 21-PIN EURO CONNECTOR (SCART) : EXT-1 / EXT-2

Pin No. Signal designation Matching value EXT-1 EXT-2

1 AUDIO R output 500mV(rms) (Nominal),, Low impedance Used (TV OUT) Used (LINE OUT)

2 AUDIO R input 500mV(rms) (Nominal),, High impedance Used (R1) Used (R2)

3 AUDIO L output 500mV(rms) (Nominal),, Low impedance Used (TV OUT) Used (LINE OUT)

4 AUDIO GND Used Used

5 GND (B) Used Used

6 AUDIO L input 500mV(rms) (Nominal),, High impedance Used (L1) Used (L2)

7 B input 700mV

8 FUNCTION SW

(SLOW SW)

9 GND (G) Used Used

10 SCL / T-V LINK Not used Used

11 G input 700mV

12 SDA Not used Used (SDA2)

13 GND (R) Used Used

14 GND (YS) Used Not used

15 R / C input R : 700mV

16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75Ω Used Used

17 GND (VIDEO output) Used Used

18 GND (VIDEO input) Used Used

19 VIDEO output 1V

20 VIDEO / Y input 1V

21 COMMON GND Used Used

Low : 0V-3V
High : 8V-12V, High impedance

C : 300mV

(P-P)

(P-P)

, 75Ω Used Used

(B-W)

, 75Ω Used Used

(B-W)

, 75Ω

(B-W)

, 75Ω

(P-P)

(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT)
(Negative sync), 75Ω Used Used

(P-P= Peak to Peak, B-W= Blanking to white peak)

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

OFF TIMER

This function can set the TV to automatically turn off after a set
time.

COLOUR SYSTEM

If the picture is not clear or no colour appears, change the
current colour system to another colour system.

Used Used

(SCL2 / TV-LINK)

Used (R) Used (C2/R)

21 19 17 15 13 11 9 7 5 3 1

(No.YA303)1-7

2.3 TECHNICAL INFORMATION

2.3.1 LCD PANEL

This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light
does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.

2.3.1.1 SPECIFICATIONS

The following table shows the specifications of this unit.

Item Specifications Remarks

Displayed colour 16777216 colours 256 colours for R, G, and B

Brightness 450cd/m

2

Contrast ratio 400: 1

Response time 25ms

View angle Horizontally: 176°, Vertically: 176°

2.3.1.2 PIXEL FAULT

There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.

 BRIGHT FAULT

In this pixel fault, a cell that should not light originally is lighting on and off.
For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.

 DARK FAULT

In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting.
For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.

 FLICKER FAULT

In the pixel fault, a cell that should light originally or not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on
and off.

1-8 (No.YA303)

2.4 BASIC OPERATION OF SERVICE MODE

2.4.1 HOW TO ENTER THE SERVICE MODE

(1) Press [INFORMATION] key and [MUTING] key on the

remote control unit simultaneously to enter the SERVICE
MODE SCREEN.

SERVICE MODE SCREEN

Adjust ...
Options ...
Aps Wss Test ...

17JVC 0. 0. 86
Sep 27 2004 08:47:10

2.4.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.

2.4.3 CHANGE AND MEMORY OF SETTING VALUE

 SELECTION OF SETTING MENU & ITEM

• [FUNCTION /] key : Select the SETTING MENU & ITEM

• [OK] key : Decision the SETTING MENU & ITEM

 CHANGE OF SETTING VALUE (DATA)

• [FUNCTION /] key.

 MEMORY OF SETTING VALUE (DATA)

The setting value will be stored automatically when release the
REMOTE CONTROL UNIT keys

2.4.4 SERVICE MODE SELECT KEY LOCATION

[OK]

[FUNCTION ]

Service

[FUNCTION ]

2.4.5 SERVICE MODE SETTING ITEMS

Setting

menu

Setting items Contents

Adjust Group ----

Mode ---­Col. Temp. ---­Contrast ---­Brightness ---­Colour ---­Sharpness ---­Red ---­Green ---­Blue ---­Aps Volume ----

Option 1 First APS If ON, TV starts with APS

menu at Start-up
BG ---­DK ---­I---­L---­L' ---­FM Prs Avl On Adjusts the FM Prescaler

value, when Automatic

Volume Levelling is On
Nicam Prs Avl On Adjusts the Nicam Prescal-

er value, when Automatic

Volume Levelling is On
Scart Prs Avl On Adjusts the Scart Volume

value, when Automatic

Volume Levelling is On
Scart Volume Avl On Adjusts the Scart Volume

value, when Automatic

Volume Levelling is On
FM Prs Avl Off Adjusts the FM Prescaler

value, when Automatic

Volume Levelling is Off

Option 2 Nicam Prs Avl Off Adjusts the Nicam Prescal-

er value, when Automatic

Volume Levelling is Off
Scart Prs Avl Off Adjusts the Scart Prescal-

er value, when Automatic

Volume Levelling is Off
Scart Volume Avl Off Adjusts the Scart Volume

value, when Automatic

Volume Levelling is On
Avl Enable/disable Automatic

Volume Levelling System
Sound ---­Carrier ---­LDLY ---­AGC ----

Aps Wss Test Programme ----

VPS ---­Scart Volume Avl Off ---­Pdc Format 1 ---­Pdc Format 2 ---­Name ---­WSS ----

(No.YA303)1-9

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

NOTE:

• Make sure that the power cord is disconnected from the outlet.

• Pay special attention not to break or damage the parts.

• When removing each board, remove the connectors as required.

• Taking notes of the connecting points (connector numbers) makes service procedure manageable.

• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.

3.1.1 REMOVING THE FOOT ASSEMBLY

(1) Remove the HINGE COVER.
(2) Remove the 4 screws [A], then remove the FOOT

ASSEMBLY.

3.1.2 REMOVING THE BACK COVER

• Remove the HINGE COVER & the FOOT ASSEMBLY.
(1) Remove the DOOR SOCKET.
(2) Remove the 9 screws [B].
(3) Remove the BACK COVER toward you.

3.1.3 REMOVING THE AV JACK BRACKET

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [C].
(2) Remove the AV JACK BRACKET.

3.1.4 REMOVING THE AV JACK PWB

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.

• Remove the AV JACK BRACKET.
(1) Remove the 2 screws [D].
(2) Remove the AV JACK PWB.

3.1.5 REMOVING THE FRONT CONTROL PWB

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [E].
(2) Remove the FRONT CONTROL PWB with FUNCTION

BUTTON.

(3) Remove the FRONT CONTROL PWB from FUNCTION

BUTTON.

3.1.6 REMOVING THE HEADPHONE JACK PWB

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screw [F].
(2) Remove the HEADPHONE JACK PWB.

3.1.7 REMOVING THE MAIN PWB

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 7 screws [G].
(2) Remove the MAIN PWB.

3.1.9 REMOVING THE SCART BRACKET

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [K].
(2) Remove the SCART BRACKET.

3.1.10 REMOVING THE MAIN FRAME

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.

• Remove the SCART BRACKET.
(1) Remove the 4 screws [L].
(2) Remove the MAIN FRAME from the FRONT PANEL.

3.1.11 REMOVING THE LCD PANEL UNIT

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.

• Remove the SCRAT BRACKET.

• Remove the MAIN FRAME.
(1) Remove the 4 screws [M].
(2) Sightly raise the both sides of the LCD PANEL UNIT by

hand from the MAIN FRAME.

NOTE :

• Pay special attention not to break or damage on the LCD

PANEL face or frame.

• The LCD PANEL UNIT is fixed to the FRONT COVER (at the

back side) by using double-side adhesive tapes. To remove
the LCD PANEL UNIT, remove the adhesive tape on the
FRONT PANELslowly.

3.1.12 REMOVING THE SPEAKERS

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [N].
(2) Remove the SPEAKER from the FRONT COVER.
(3) Follow the same when removing the other hand speakers.

3.1.13 REMOVING THE LED PWB

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [O].
(2) Remove the LED PWB from the FRONT COVER.

3.1.8 REMOVING THE INVERTER UNIT

• Remove the HINGE COVER & the FOOT ASSEMBLY.

• Remove the BACK COVER.
(1) Remove the 2 screws [H].
(2) Remove the INVERTER SHEELD.
(3) Remove the 4 screws [J].
(4) Remove the INVERTER UNIT.

1-10 (No.YA303)

INVERTER

SHEELD COVER

MAIN PWB

INVERTER

H

J

UNIT

L

M

G

SOCKET

DOOR

SIDE AV

DOOR

SCART

BRACKET

B

(X9)

K

M

HANG METAL

BACK

COVER

LCD PANEL

UNIT

HEADPHONE

JACK PWB

FRONT

CONTROL

N

PWB

F

HINGE COVER

FOOT ASSEMBLY

A

FOOT SUPORT

D

AV-JACK

C

PWB

METAL HINGE
BRACKET

SPEAKER

E

FRONT PANEL

O

LED

PWB

(No.YA303)1-11

3.2 MEMORY IC REPLACEMENT

• This model uses the memory IC.

• This memory IC stores data for proper operation of the video and drive circuits.

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

3.2.1 SETTINGS OF FACTORY SHIPMENT

3.2.1.1 BUTTON OPERATION 3.2.1.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

TV/AV TV

3.2.1.3 REMOTE CONTROL MENU OPERATION

(1) PICTURE

Setting item Setting position

MODE Bright

Contrast 33 Step

Bright-1 26 Step

Sharpness 11 Step

Colour 36 Step

Bright-2 7 Step

Colour Temp. Cool

Nolse Red. Min

(2) SOUND

Setting item Setting position

Volume 10 Step

Bass 16 Step

Treble 15 Step

Balance 16 Step

Hyper Sound Off

Sound Mode Mono

Setting item Setting position

ZOOM AUTO

(3) FEATURES

Setting item Setting position

Sleep Timer Off

Child Lock Off

Language English

EXT-2 Output TV

Blue Back Off

(4) Install [TV MODE]

Setting item Setting position

Colour System Auto

Decorder(EXT-2) On

VCR Off

(5) Install [EXT MODE]

Setting item Setting position

Colour System Auto

VCR Off

1-12 (No.YA303)

3.3 REPLACEMENT OF CHIP COMPONENT

3.3.1 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 part after removing it.

3.3.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.

3.3.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

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

alternately melt the solder at each end.

(2) Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

SOLDER

[Resistors, capacitors, 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. Then heat and melt the solder at both ends of the
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 A as indicated in the figure.

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

alternately melt the solder at each lead. Shift and remove
the chip part.

NOTE :

After removing the part, remove remaining solder from the
pattern.

A

B

C

(4) Then solder leads B and C.

A

B

C

(No.YA303)1-13

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-14 (No.YA303)

Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan

(No.YA303)

Printed in Japan

VPT

LT-20B60SU

ENGLISH

DEUTSCH

FRANÇAIS

ITALIANO

©2004 VICTOR COMPANY OF JAPAN, LIMITED

50066101

1004TKH-VT-VT

LCD PANEL TV

LCD-TV-GERÄT
PANNEAU LCD TELEVISEUR
TV A SCHERMO LCD

INSTRUCTIONS

BEDIENUNGSANLEITUNG

MANUEL D'INSTRUCTIONS

ISTRUZIONI

Contents

For your safety

For your safety ......................................... 1

Important Information ............................. 4

Remote Control Buttons .......................... 5

Control Panel Buttons ............................. 6

Using the stand ........................................ 7

How to remove the stand ........................ 7

Installing TV on the wall .......................... 8

Preparation .............................................. 9

Before Switching on your TV .................. 9

Switching the TV ON/OFF ...................... 10

Initial Settings ......................................... 11

Operating the TV .................................... 12

Menu System ......................................... 13

Other Features....................................... 19

PC Mode ................................................. 21

Teletext ................................................... 23

Peripheral Equipment Connections ..... 24

This equipment has been designed and
manufactured to meet international safety stan­dards but, like any electrical equipment, care
must be taken if you are to obtain the best
results and safety is to be assured. So, please
read the points below for your own safety. They
are of a general nature, intended to help you
with all your electronic consumer products and
some points may not apply to the goods you
have just purchased.

Some DOs and DONTs for you

Air Circulation

Leave at least 10cm clearance around the tele­vision to allow adequate ventilation. This will
prevent the TV from overheating and conse­quential possible damage to the TV. Dusty
places should also be avoided.

Heat Damage

Damage may occur if you leave the TV in di­rect sunlight or near a heater. Avoid places
subject to extremely high temperatures or hu­midity, or locations where the temperature is
likely to fall below 5ºC (41ºF).

Antenna Connections ............................ 27

Peripheral Equipment Connections ..... 27

PC Input Typical Display Modes ......... 28

Tips ......................................................... 29

Specifications ........................................ 30

Mains Supply

The mains supply required for this equipment
is 220-240 V AC, 50 Hz. Never connect to a
DC supply or any other power source. DO en­sure that the TV is not standing on the mains
lead. DO NOT cut off the mains plug from this
equipment, this incorporates a special Radio
Interference Filter, the removal of which will
impair its performance.

Hot / Moderate Climate Conditions

This device is suitable for working in hot and
moderate climate conditions.

ENGLISH - 1 -

IF IN DOUBT PLEASE CONSULT A COMPE­TENT ELECTRICIAN.

DO

DO read the operating instructions before you
attempt to use the equipment.

DO ensure that all electrical connections (in­cluding the mains plug, extension leads and
inter-connections between pieces of equip­ment) are properly made and in accordance
with the manufacturers instructions.

Switch off and withdraw the mains plug be­fore making or changing connections.

DO consult your dealer if you are ever in doubt
about the installation, operation or safety of
your equipment.

DO be careful with glass panels or doors on
equipment.

DO NOT

DONT remove any fixed cover as this may
expose dangerous voltages.

DONT obstruct the ventilation openings of the
equipment with items such as newspapers,
table-cloths, curtains etc. Overheating will
cause damage and shorten the life of the
equipment.

DONT allow electrical equipment to be ex­posed to dripping or splashing or objects filled
with liquids, such as vases, to be placed on
the equipment.

DONT place hot objects or naked flame
sources, such as lighted candles or night­lights on, or close to the equipment. High tem­peratures can melt plastic and lead to fires.

DONT use makeshift stands and NEVER fix
legs with wood screws. To ensure complete
safety, always fit the manufacturers approved
stand or legs with the fixings provided accord­ing to the instructions.

DONT listen to headphones at high volume,
as such use can permanently damage your
hearing.

DONT leave equipment switched on when it
is unattended, unless it is specifically stated
that it is designed for unattended operation or
has a standby mode. Switch the equipment
off and make sure your family know how to do

this. Special arrangements may need to be
made for infirm or handicapped people.

DONT continue to operate the equipment if
you are in any doubt about it working normally,
or it is damaged in any way  switch off, with­draw the mains plug and consult your dealer.

DONT put the empty batteries into garbage
instead of recycle bin to reduce harmfull ef­fects to the environment.

ABOVE ALL  NEVER let anyone, especially
children, push anything into holes, slots or
any other openings in the case  this could
result in a fatal electric shock.

NEVER guess or take chances with electrical
equipment of any kind  it is better to be safe
than sorry.

To fully disconnect the TV, switch off the
mains socket and remove the Power plug.
Safety Precautions for Power adaptor

 Be careful! May become hot.

 For indoor and dry location use only.

 Risk of electric shock.

 Shock hazard, do not open.

 Keep all power adaptors away from any other

heat source.

 Always use power adaptor(s) well-ventilated

area.

** Cold cathode fluoresant lamp in LCD PANEL

contains a small amount of mercury, please
follow local ordinates or regulations for dis­posal.

"The LCD panel is very high technology prod­uct with about a million thin film transistors,
giving you fine picture details. Occasionally,
a few non-active pixels may appear on the
screen as a fixed point of blue, green or red.
Please note that this does not affect the per­formance of your product." Please note that
certain light guns used with games consoles
may not work on this product.

Warning:

This is a Class A product. In a domestic envi­ronment this product may cause radio inter­ference in which case the user may be re­quired to take adequate measures.

ENGLISH - 2 -

WARNING : TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO

RAIN OR MOISTURE.

WARNING

 Fingers may be trapped under the TV causing injuries.

Hold the TV at the bottom in the middle, and do not allow

the stand to tilt up or down.

 The TV may fall causing injuries. Hold the bottom of the

stand with your hand and tilt the TV up and down.

 Do not allow children to hang from the TV, place their

elbows on the TV or lean against the TV. Doing so may
cause the TV to fall over and lead to injuries.

CAUTION:

 To avoid electric shock or damage to the unit, first firmly

insert the small end of the power cord into the AC Adaptor
unit it is no longer wobbly, and then plug the larger end of
power cord into an AC outlet.

CAUTION:

 The TV screen may be damaged if the TV is carried as

shown in the diagram.

The TV should always be carried by two people.

ENGLISH - 3 -

Important Information

Please take note

EXCLUSION CLAUSE

JVC shall under no circumstances be liable for loss and/or damage to the product caused
by:

 fire;

 earthquake;

 accidental damage;

 intentional misuse of the product;

 use of the product in improper conditions;

 loss and/or damage caused to the product whilst in the possession of a third party;

 any damage or loss caused as a result of the owner s failure and/or neglect to follow the

instructions set out in the owners manual;

 any loss or damage caused directly as a result of misuse or malfunction of the product

when used simultaneously with associated equipment;

Furthermore, under no circumstances shall JVC be liable for any consequential loss and/
or damage including but not limited to the following, loss of profit, interruption of business,
the loss of recorded data whether caused during normal operation or misuse of the
product.

WARNING! NEVER LEAVE A

Care and disposal

STATIONARY IMAGE ON THE

SCREEN

If stationary images generated by TELETEXT,
CHANNEL IDENTIFICATION LOGOS, COM­PUTER DISPLAYS, VIDEO GAMES, ON
SCREEN MENUS, etc. are left on the TV
screen for any length of time, they could be­come permanently ingrained.

If you use your television to display completely
still images, or moving pictures which have a
permanent still image superimposed e.g.
broadcast network logos, it is always advis­able to reduce BOTH the brightness and con­trast settings.

Cleaning the screen and cabinet...

Turn off the power, clean the screen and cabi­net with a soft, dry cloth. We recommend that
you do not use any proprietary polishes or
solvents on the screen or cabinet as this may
cause damage.

Disposal...

When the set reaches the end of its useful
life please dispose of it in accordance with
Local Government Regulations or at a recy­cling centre.

ENGLISH - 4 -

Remote Control Buttons











/ I = (Stand By) button

TV / VCR / DVD Switch

Number buttons

A V button (TV, EXT-1, EXT-2, EXT-2 S,

EXT-3, EXT-3 S or PC)

BLUE / PICTURE Mode button

YELLOW / Sleep Timer button

MENU button

= Cursor Up button

OK button

= Cursor Right button

BACK button

Volume Up/Down buttons

Teletext / VCR /DVD Control buttons

Programme Up/Down buttons

= Cursor Down button

= Teletext Button

= Cursor Left button















= Stereo / Bilingual button

GREEN / Hyper Sound On/Off button

RED / ZOOM Mode button

= Information Button / T-V Link in

Program Menu

= Mute button

ENGLISH - 5 -





Control Panel Buttons

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ENGLISH - 6 -