LG Z20LCD1 Manuale utente

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Website:http://biz.LGservice.com

e-mail: http://www.LGEservice.com/techsup.html

LCD TV SERVICE

MANUAL

FACTORY MODEL: 20LV1R.AUSBZA

MODEL: Z20LCD1

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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CONTENTS

CONTENTS ......................................................................................................................................2

PRODUCT SAFETY .......................................................................................................................3

SPECIFICATION ...............................................................................................................................6

SVC REMOCON……………... .....................................................................................................8

TROUBLE SHOOTING ..................................................................................................................9

BLOCK DIAGRAM.........................................................................................................................13

WIRING DIAGRAM .........................................................................................................................15

EXPLODED VIEW ...............……………………………................................................................... 16

REPLACEMENT PARTS LIST ............................…...............……………………………................ 18

SVC. SHEET .................................................................................................................................

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SAFETY PRECAUTIONS

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SERVICING PRECAUTIONS

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.

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SPECIFICATION

NOTE: Specifications and others are subject to change without notice for improvement.

1. Application range

1.1 This spec sheet is applied all of the 20" LCD TV

1.2 Not included spec and each product spec in this spec sheet apply correspondingly to the following each country

standard and requirement of Buyer

2. Specification

Each part is tested as below without special appointment.

2.1 Temperature: 20±5°C

2.2 Relative Humidity: 65±20%

2.3 Power Voltage: input voltage (110V±10%, 50/60±3 Hz)

* Standard Voltage of each product is marked by models

2.4 Specification and performance of each parts are followed each drawing and specification by part number in

accordance with BOM.

2.5 The receiver must be operated for about 30 minutes prior to the adjustment.

3.General Specification (TV)

No Item Specification

1. Input Signal RF (NTSC-M), Video, S-Video, Component Video, Graphic (VGA)

Component Support 480i, 576i, 480P, 576P, 720P, 1080i

3. Input Voltage 110V±10%, 50/60±3 Hz

4. Market USA

5. Screen Size 20 inch Wide

6. Vertical refresh rate 56 Hz to 75 Hz

7. Horizontal frequency 31.5 kHz

Resolutions

640 x 480

Operating Environment Temp: 0 ~ 40 deg, Humidity: 10% ~ 80 %

10.

Storage Environment

Temp: -10 ~ 50 deg, Humidity: 5% ~ 85 %

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4. External Input Format

4-1. AV/S-Video/Component Video Inputs

AV (Composite Video)

Video system NTSC

Amplitude 1.0Vpp (including sync)

Impedance 75 ohm terminated

S-Video

Video system NTSC

Y signal amplitude 1.0Vpp (including sync)

C signal amplitude 0.286Vpp

Impedance 75 ohm terminated

Component Video

HDTV 480i, 480p, 720p, 1080i

Y signal amplitude 1.0Vpp (including sync)

Pr,(R-Y) / Pb ,(B-Y) signal amplitude 0.7Vpp

Impedance 75 ohm terminated

4-2. TV RF Inputs

TUNER SIGNAL

Receiving System NSTC-M

Channel Coverage NSTC-M

Tuner ChangHong AF5-U2F11RW

AIR CATV

VHF Low band 55.25~127.25 55.25~127.25

VHF High band 133.25~361.25 133.25~361.25

UHF band 367.25~801.25 367.25~801.25

Picture carrier Sound carrier

IF Frequency 45.75 MHz 41.25MHz

Impedance 75 ohm terminated

LEVEL 70dBuV

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SVC REMOCON

Key Function

POWER Press to turn on/off the TV. The TV is never completely powered

off unless it is physically unplugged.

DISPLAY Display current status

MUTE Temporarily interrupt the sound or restore

Press ▲ or▼ to brows through the TV channels which are not

erased. To view a blocked channel, use the digit buttons to access

the channel and enter your access code.

VOL Press + or – to adjust the volume.

0~9/100 To select a TV channel directly

PRE-CH To return the last channel you were watching.

PC To change PC mode (only for Z15LCD1)

V-CHIP Press this button to setup parental control.

TV/VIDE

Select your input source: press repeatedly to select TV, AV1, AV2,

S-Video or Component Video mode, according to where you

connected your external source.

SLEEP

With this key you can set a time period after which the TV should

switch itself to standby. Press the key repeatedly to select the

number of minutes. The counter runs from 0,30,60,90,120

minutes. The timer begins to count down from the number of

minutes selected after the display has disappeared.

MTS/SAP Press this key to activate Multi-channel Television Sound, Stereo

or Mono sound.

Up/Down/

Left/Right

Up/Down to select the function in the Menu.

Left/Right to enter the function or adjust the value

MENU Press repeatedly to display OSD menu or exit the menu or

sub-menu.

CAPTION Press this button to bring up closed caption setup menu.

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