LG RZ-30LZ13 Schematic

LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : ML-038A

MODEL : RZ-30LZ13

website:http://biz.LGservice.com

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

Aug., 2003

Printed in KoreaP/NO : 3828VD0120G

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CONTENTS

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

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

CONTROL DESCRIPTIONS......................................................................4

SPECIFICATIONS......................................................................................8

ADJUSTMENT INSTRUCTIONS.............................................................12

TROUBLE SHOOTING............................................................................14

PRINTED CIRCUIT BOARD....................................................................15

BLOCK DIAGRAM...................................................................................19

EXPLODED VIEW .................................................................................. 20

EXPLODED VIEW PARTS LIST..............................................................21

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

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PRODUCT SAFETY

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audiovisual service
technicians. When servicing this product, under no circumstances should the
original design be modified or altered without permission from LG Electronics
Inc. All components should be replaced only with types identical to those in the
original circuit and their physical location, wiring, and lead dress must conform
to original layout upon completion of repairs. If any fuse (or Fusible Resistor) in
this TV receiver is blown, replace it only with the factory specified fuse type and
rating. When replacing a high wattage resistor (Oxide Metal Film Resistor, over
1W), keep the resistor 10mm away from PCB. Always keep wires away from
high voltage or high temperature parts.

Special components are also used to prevent shock and fire hazard.
These components are indicated by the letter “x” included in their component
designators and are required to maintain safe performance. No deviations are
allowed without prior approval by LG Electronis Inc. Service work should be
performed only after you are thoroughly familiar with these safety checks and
servicing guidelines.

Circuit diagrams may occasionally differ from the actual circuit used.
This way, implementation of the latest safety and performance improvement
changes into the set is not delayed until the new service literature is printed.

CAUTION: Do not attempt to modify this product in any way.

Never perform customized installations without manufacturer’s
approval.
Unauthorized modifications will not only void the warranty, but may
lead to property damage or user injury.

GENERAL GUIDANCE

An lsolation Transformer should always be used during the servicing
of a receiver whose chassis is not isolated from the AC power line. Use a
transformer of adequate power rating to protect against personal injury from
electrical shocks. It will also protect the receiver and its components from being
damaged by accidental shorts of the circuitry that may be inadvertently
introduced during the service operation.

Before returning the receiver to the customer, always perform an AC leakage
current check on the exposed metallic parts of the cabinet, such as antennas,
terminals, etc., to be sure the set is safe to operate
without damage of electrical shock.

LEAKAGE CURRENT COLD CHECK
(ANTENNA COLD CHECK)

With the instrument’s AC plug removed from AC source, connect an electrical
jumper across the two AC plug prongs. Place the AC switch in the on position,
connect one lead of ohm-meter to the AC plug prongs tied together, and touch
other ohm-meter lead in turn to each exposed metallic parts such as antenna
terminals, phone jacks, etc. If the exposed metallic part has a return path to the
chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When
the exposed metal has no return path to the chassis the reading must be
infinite. Any other abnormality that exists must be corrected before
the receiver is returned to the customer.

ELECTROSTATICALLY SENSITIVE DEVICES

Some semiconductor (solid-state) devices can be damaged easily by static
electricity. Such components commonly are called Electrostatically Sensitive
(ES) Devices. Examples of typical ES devices are integrated circuits and some
field-effect transistors and semiconductor “chip” components. The following
techniques should be used to help reduce the incidence of component damage
caused by static electricity.

1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic charge on the
body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be
removed for potential shock reasons prior to applying power to the unit under
test.

2. After removing an electrical assembly equipped with ES devices, place the
assembly on a conductive surface such as an ESD mat, to prevent
electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices
not classified as “anti-static” can generate electrical charges sufficient to
damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charge
sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until
immediately before you are ready to install it. (Most replacement ES devices
are packaged with leads electrically shorted together by conductive foam,
aluminum foil, or comparable conductive material.)

7. Immediately before removing the protective material from the leads of a
replacement ES device, touch the protective material to the chassis or circuit
assembly into which the device will be installed.

Caution: Be sure no power is applied to the chassis or circuit, and observe

all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES
devices. (Otherwise, seemingly harmless motion, such as the brushing
together of your clothing or the lifting of your foot from a carpeted floor, can
generate static electricity sufficient to damage an ES device.)

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All the functions can be controlled with the remote control handset.
Some functions can also be adjusted with the buttons on the front
panel of the set.

Remote control handset

Before you use the remote control handset, please install the bat­teries. See the next page.

1. POWER

switches the set on from standby or off to standby.

2. MULTIMEDIA

selects RGB or DVI modes.

3. ARC (Aspect Ratio Control)

changes the picture format.

4. PIP BUTTONS
PIP/DW

switches the sub picture on or off.

PR +/-

selects a programme for the sub picture.

SWAP

alternates between main and sub picture.

PIP INPUT

selects the input mode for the sub picture.

WIN.SIZE

adjusts the sub picture size.

WIN POSITION

moves the sub picture to

DD/EE

or FF / GG direction.

5. SWAP

returns to the previously viewed programme.

6. MENU

selects a menu.

7.

DD/EE

(Programme Up/Down)

selects a programme or a menu item.
switches the set on from standby.

FF / GG (Volume Up/Down)

adjusts the volume.
adjusts menu settings.

OK

accepts your selection or displays the current mode.

8. NUMBER BUTTONS

switches the set on from standby or directly select a number.

9. PSM (Picture Status Memory)

recalls your preferred picture setting.

10. SPLIT ZOOM

Enlarge the screen with regular ration.

11. VCR BUTTONS

control a LG video cassette recorder.

123

456

78

0PSM SSM

SIZE

REVEAL

UPDATE

MIX

HOLD

INDEX MODE

TIME

9

POWER

MULTIMEDIA INPUT SELECT

ARC I/II

PIP/DW

TEXT

PR-

PR+

SWAP

MENU PR

PR

MUTE

OK

VOL

WIN.POSITION

SPLIT ZOOM

ZOOM-

WIN.SIZE

ZOOM+

SLEEP

LIST

STOP

PLAY

FF

REC

REW

P/STILL

VOL

PIP INPUT

?

M

1
2

3
4

6

5

9

11

10

8

7

12
13
14

15

16

17
18

19

CONTROL DESCRIPTIONS

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12. INPUT SELECT

selects the remote operating mode.

switches the set on from standby.

13. I/II

selects the language during dual language broadcast.
selects the sound output.

14. TELETEXT BUTTONS

These buttons are used for teletext.
For further details, see the ‘Teletext’ section.

15. MUTE

switches the sound on or off.

16. SSM (Sound Status Memory)

recalls your preferred sound setting.

17. LIST

displays the programme table.

18. SLEEP

sets the sleep timer.

19. ZOOM+ / ZOOM-

Enlarges or reduces the main picture size.

Note : In teletext mode, the PR +/-, SWAP and PIP INPUT buttons
are used for teletext function.

Battery installation

The remote control handset is powered by two AAAtype batteries.
To load the batteries, turn the remote control handset over and
open the battery compartment. Install two batteries as indicated by
the polarity symbols ( and ) marked inside the compartment.

Note : To avoid damage from possible battery leakage, remove the
batteries if you do not plan to use the remote control handset for an
extended period of time.

+

-

1 2 3

4 5 6

7 8

0PSM SSM

SIZE

REVEAL

UPDATE

MIX

HOLD

INDEX MODE

TIME

9

POWER

MULTIMEDIA INPUT SELECT

ARC I/II

PIP/DW

TEXT

PR-

PR+

SWAP

MENU PR

PR

MUTE

OK

VOL

WIN.POSITION

SPLIT ZOOM

ZOOM-

WIN.SIZE

ZOOM+

SLEEP

LIST

STOP

PLAY

FF

REC

REW

P/STILL

VOL

PIP INPUT

?

M

1
2

3
4

6

5

9

11

10

8

7

12
13
14

15

16

17
18

19

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1. MAIN POWER (ON OFF)

switches the set on or off.

2. INPUT SELECT

selects TV, AV1, AV2, AV3, S-Video, RGB or
DVI mode.
switches the set on from standby.

3. MENU

selects a menu.

4. FF / GG (Volume Down/Up)

adjusts the volume.
adjusts menu settings.

DD/EE

(Program Up/Down)

selects a program or a menu item.
switches the set on from standby.

5. POWER (O /I)

switches the set on from standby or off to
standby.

6. POWER/STANDBY INDICATOR (O)

illuminates red in standby mode.
illuminates green when the set is switched on.

7. REMOTE CONTROL SENSOR

Front panel

1 2 3 5 6

7

4

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1. EXTERNAL SPEAKER (6 ohm output)

connect to optional external speaker(s).

2. POWER CORD SOCKET

3. S-VIDEO INPUT

connect video out from an S-VIDEO VCR to
the S-VIDEO input.

4. EURO SCART SOCKET

connect the euro scart socket of the VCR to
these sockets.

5. AERIAL SOCKET

connect the RF socket of the VCR to the aer­ial socket.

6. RGB INPUT / DVI (Digital Visual Interface)
INPUT

connect the set output socket of the PER­SONAL COMPUTER to this socket.

Note : This set is only provided the DVI-D
function although DVI jack drawing is DVI-I
jack for connection convenience.

7. AUDIO INPUT

connect audio out from external equipment to
these jack.

8. RS-232C INPUT (CONTROL/SERVICE)
PORT

connect to the RS-232C port on a PC.

Back panel

1 2 43

4

5

8
7

6

1. Application range

This specification is applied to ML-038A chassis.

2. Requirement for Test

Testing for standard of each part must be followed in below
condition.

(1) Temperature: 25°C ± 5°C(But, CST must be tested 40°C ±

2°C (Humidity: 50%))
(2) Humidity: 65% ± 10%
(3) Power: Standard input voltage (AC 230V, 50/60Hz)

(4) Measurement must be performed after heat-run more than

20min.

(5) Adjusting standard for this chassis is followed a special

standard.

3. Test and Inspection method

(1) Capacity: Follow LG electronics TV Testing Standard.
(2) Another Required Standard
EMI: Following CE Standard(EN55020)
SAFETY: Following CB Standard(EN55013)

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SPECIFICATION

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

.

4.General Specification

1

2

3

4
5
6
7

8
9
10
11
12

13

14
15
16

Video input applicable system

AV input system

Available channel

PC signal input (RGB input)
Input voltage
Market
Active display size
(Diagonal)
Operating temperature
Operating humidity
Storage temperature
Storage humidity
LCD Panel

Lamp

Weight
Size of outline
Speaker reqularity Impedance

Specification

Min Typ Max Unit

1)PAL/SECAM-BG

2)PAL/SECAM-DK

3)PAL-I

4)SECAM-L/L’

1)PAL

2)SECAM

3)NTSC 3.58/ 4.43

1)VHF: E2-E12
UHF: E21-E69
CATV: S1-S20
HYPER: S21-S41

2)L/L’ VHF: B,C, D

VGA, SVGA, XGA(1024x768), SXGA(1280x1024)
AC 230V, 50/60Hz
EU

Min 29.53 Max Inch
Min 750.06 Max [mm]

0 29.53 40 Deg

Min 29.53 85 %

-20 29.53 60 Deg

Min 29.53 85 %

LC300W01 - A3P4
TFT Active Matrix LCD panel

697.8 x 431.8 x 50.9 [mm]
Wide (15:9)
1280 x 768

0.5025 x 0.1675 x RGB

Min 6.4 Kg

CCFL type

Min 16 85 EA

Min 99.8 109.8 W

50,000 29.53 85 hrs

1030 1040 1100 Vrms

3 6 6.5 mA

21.5 22.5 23.5 Kg

501.6mm(H) x 1051mm(W) x 109mm(D) mm

6 Ω

Item Remark

No.

Refer to Table1

Active size

Humidity:50%

LG philps LCD

[mm]

Life Time:
Until brightness
of lamp goes to
half of its initial
brightness.
TV + Speaker
TV + Speaker
TWeeter - 8Ω

Model name
Feature
Outline Dimension
Aspect ratio
Resolution
Pixel Pitch
Weight
Backlight System
Quantity
Power consumption
Life time
Operating voltage
Operating current