LG 42PX3RVA ZC Schematic

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PLASMA TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : MF-056C

MODEL : 42PX3RVA

42PX3RVA-ZC

website:http://biz.LGservice.com

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

VOL

MENUTV/AV OK

- 2 -

CONTENTS

SAFETY PRECAUTIONS ...................................................................................3

DESCRIPTION OF CONTROLS .........................................................................4

SPECIFICATIONS ...............................................................................................9

ADJUSTMENT INSTRUCTIONS ......................................................................11

TROUBLE SHOOTING GUIDE..........................................................................15

BLOCK DIAGRAM.............................................................................................24

EXPLODED VIEW..............................................................................................26

EXPLODED VIEW PARTS LIST ........................................................................27

REPLACEMENT PARTS LIST...........................................................................28

SCHEMATIC DIAGRAM ........................................................................................

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

- 3 -

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in

the Schematic Diagram and Replacement Parts List.

It is essential that these special safety parts should be replaced with the same components as recommended in this manual to

prevent X-RADIATION, Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

General Guidance

An isolation 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

as this protects the technician from accidents resulting in

personal injury from electrical shocks.

It will also protect the receiver and it's components from being

damaged by accidental shorts of the circuitry that may be

inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this monitor is blown, replace

it with the specified.

When replacing a high wattage resistor (Oxide Metal Film

Resistor, over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to high vacuum and large surface area of picture tube,

extreme care should be used in handling the Picture Tube.

Do not lift the Picture tube by it's Neck.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument 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.

An other abnormality exists that must be corrected before the

receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor

between a known good earth ground (Water Pipe, Conduit, etc.)

and the exposed metallic parts.

Measure the AC voltage across the resistor using AC

voltmeter with 1000 ohms/volt or more sensitivity.

Reverse plug the AC cord into the AC outlet and repeat AC

voltage measurements for each exposed metallic part. Any

voltage measured must not exceed 0.75 volt RMS which is

corresponds to 0.5mA.

In case any measurement is out of the limits specified, there is

possibility of shock hazard and the set must be checked and

repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument's

exposed

METALLIC PARTS

Good Earth Ground

such as WATER PIPE,

CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

Remote Control Key Functions

- When using the remote control aim it at the remote control sensor of the set.

- There's maybe a defect in consecutive operation of remote control in specified brightness according to this set feature.

POWERMUTE

TV/AV I/II

LIST

VOL

123

456

789

PSM SSM

VOL

ARC MENU

Q.VIEW TEXT SLEEP

TIME

MIX

HOLD

REVEAL

INDEX

MODE

MULTIMEDIA

SIZE

UPDATE

MULTIMEDIA

Selects the Component, RGB or

HDMI

modes.

switches the set on from standby.

POWER

switches the set on from standby or

off to standby.

ARC

Changes the picture format.

Displays on screen menus one by

one.

Exits the current menu.

Memorizes menu changes.

Q.VIEW

Returns to the previously viewed pro-

gramme.

Note : This function works only when

Favourite programme is set to Off.

Otherwise each press of this button

will select a stored favorite pro-

gramme.

SSM

To select the sound appropriate to

your viewing programme character.

NUMBER buttons

SLEEP

Sets the sleep timer.

I/II

Selects the language during dual lan-

guage broadcast.

Selects the sound output.

TEXT

These buttons are used for teletext.

For further details, see the ‘Teletext’

section.

COLOURED BUTTONS

These buttons are used for teletext (only

TELETEXT models) or programme edit.

LIST

Displays the programme table.

TV/AV

Selects the TV, AV, Component, RGB

HDMI

modes.

switches the set on from standby.

MUTE

Switches the sound on or off.

(Programme Up/Down)

selects a programme or a menu item.

switches the set on from standby.

(Volume Up/Down)

adjusts the volume.

adjusts menu settings.

accepts your selection or displays the

current mode.

PSM

Adjusts the factory preset picture

according to the room.

- 4 -

DESCRIPTION OF CONTROLS

- 5 -

Location and Function of Controls

VOL

MENUTV/AV OK

VOL

MENUTV/AV OK

5 6 7

1. Remote Control Sensor

2. Power Indicator

Illuminates red in standby mode, Illuminates green when the

set is turned on.

3. Power Button

Switches the set on from standby or off to standby.

4. TV/AV Button

Selects the TV, AV, Component, RGB or HDMI modes.

Switches the set on from standby.

5. MENU

Displays on screen menus one by one.

Exits the current menu.

Memorizes menu changes.

6. OK

Accepts your selection or displays the current mode.

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.

- 6 -

Location and Function of Controls

S-VIDEO

VIDEOAUDIOR

L/MONO

AV5V5

AC INPUT

RS-232C INPUT

(CONTROL/SERVICE)

Antenna

REMOTE

CONTROL

HDMI

AUDIO INPUT

RGB INPUT

(MONO)(MONO)

COMPONENTCOMPONENT

L R

AUDIOAUDIO

L R

AUDIOAUDIO

AV4V4

V VARIABLE ARIABLE

AUDIO OUTAUDIO OUT

AV1

AV2

AV3

S-VIDEOS-VIDEO VIDEOVIDEO

L R

AUDIOAUDIO

1. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT

Connect the monitor output socket of the PERSONAL COM-

PUTER, DVD or STB to this socket.

Note: If you want to use RGB/DVI audio, we strongly recom-

mend that you use the cable that has a core, or the EMI Filter

core along with separate cable.

2. CONTROL LOCK / REMOTE CONTROL

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

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

4. COMPONENT INPUT

Connect DVD video outputs to Y, P

B, PR of COMPONENT

INPUT and audio outputs to Audio sockets of AUDIO INPUT.

AUDIO/VIDEO IN SOCKETS (AV4)

Connect the audio/video out sockets of external equipment to

these sockets.

S-VIDEO/AUDIO IN SOCKETS

Connect the S-VIDEO out socket of an VCR to the S-VIDEO

socket.

Connect the audio out sockets of the VCR to the audio sock-

ets as in AV4 .

5. VARIABLE AUDIO OUTPUT

6. EURO SCART SOCKET

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

Note: If you want to use the EURO scart cable, you have to

use the signal shielded Euro scart cable.

7. ANTENNA INPUT

8. POWER CORD SOCKET

This set operates on an AC power. The voltage is indicated on

the Specifications page. Never attempt to operate the set on

DC power.

9. AUDIO/VIDEO INPUT (AV5)

S-VIDEO/AUDIO IN SOCKETS

42 3 6 75 8

- Shown is a simplified representation of the set.

- Here shown may be somewhat different from your set.

- 7 -

Displayable Monitor Specification

RGB / HDMI mode

Resolution

640x350

720x400

640x480

848x480

800x600

Horizontal

Frequency(KHz)

Vertical

Frequency(Hz)

852x480

832x624

1024x768

1152x864

1152x870

1280x960

1280x1024

70.09

85.08

70.08

85.03

59.94

66.66

72.80

75.00

85.00

60.00

70.00

75.00

60.00

70.00

75.00

56.25

60.31

72.18

75.00

85.06

74.55

60.00

70.06

75.02

85.00

60.05

70.01

75.00

75.06

60.02

31.468

37.861

31.469

37.927

31.469

35.000

37.861

37.500

43.269

31.500

37.799

39.375

31.500

37.799

39.375

35.156

37.879

48.077

46.875

53.674

49.725

48.363

56.476

60.023

68.677

54.348

63.995

67.500

68.681

60.023

63.981

RGB / HDMI mode

50PX3R series

42PX3RV series

Resolution

640x350

720x400

640x480

848x480

800x600

Horizontal

Frequency(KHz)

Vertical

Frequency(Hz)

852x480

832x624

1024x768

1360x768

1366x768

1152x864

1152x870

1280x960

1280x768

1280x1024

70.09

85.08

70.08

85.03

59.94

66.66

72.80

75.00

85.00

60.00

70.00

75.00

60.00

70.00

75.00

56.25 (RGB)

60.31

72.18

75.00

85.06

74.55

60.00

70.06

75.02

85.00

60.00

75.02

85.00

60.00

75.02

85.00

60.05

70.01

75.00

85.00

75.06

60.00

75.00

85.00

60.02

31.468

37.861

31.469

37.927

31.469

35.000

37.861

37.500

43.269

31.500

37.799

39.375

31.500

37.799

39.375

35.156

37.879

48.077

46.875

53.674

49.725

48.363

56.476

60.023

68.677

47.700

59.625

68.500

47.700

59.625

69.500

54.348

63.995

67.500

77.487

68.681

47.693

60.091

68.504

60.023

63.981

- 8 -

LG TV

Owner’s Manual

1.5V

Alkaline batteries

Power Cord

POWERMUTE

TV/AV I/II

LIST

VOL

123

456

789

PSM SSM

VOL

ARC MENU

Q.VIEW TEXT SLEEP

TIME

MIX

HOLD

REVEAL

INDEX

MODE

MULTIMEDIA

SIZE

UPDATE

Remote Control handset

- Optional extras can be changed or modified for quality improvement without any notification new optional extras can be

added.

- Contract your dealer for buying these items.

Optional Extras

Accessories

Tilt wall mounting bracket

Video cables Audio cables

Ceiling mounting bracket

- Secure the set assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.

Joinning the set assembly to the wall to protect the set tumbling

• After the set must be mounted on a desktop, install the Eye Bolts on the set as

shown.

Insert the 2 Eye Bolts and tighten securely, in the holes on the bracket.

Install the wall brackets on the wall with 2 bolts, (not supplied with the product),

as shown.

Match the height of the Eye Bolts and the wall brackets.

Check to be sure the brackets are tightened securely.

• Secure the set assembly to the wall with strong strings or wound wire cables,

(not supplied with the product), as shown.

2-Wall brackets

2-Eye Bolts

SPECIFICATIONS

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

- 9 -

V Application Range

This spec is applied to the 42”PDP TV used MF-056C Chassis.

V Specification

Each part is tested as below without special appointment.

1) Temperature : 25±5°C (77±9°F), CST : 40±5

2) Relative Humidity: 65

±10%

3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz)

* Standard Voltage of each product is marked by models.

4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM.

The receiver must be operated for about 20 minutes prior to the adjustment

V Test Method

1) Performance : LGE TV test method followed.

2) Demanded other specification

Safety: CE, IEC specification

EMC : CE, IEC

V General Specification

1. General Specification

Remark

Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020

Model Name

42PX3RVA-ZC

Market

Remark

PDP

LGE SPEC

Maker : SONY/ Sanken

Specification

42 inch wide Color Display Module

16:9

PDP42V7xxxx

RGB Closed Type, Film Filter

1) Temp : 0~40 deg

2) Humidity : 0~85%

1) Temp : -20~60 deg

2) Humidity : 0~85%

100-240V~, 50/60Hz

Item

Display Screen Device

Aspect Ratio

PDP Module

Operating Environment

Storage Environment

Input Voltage

2. Model Specification( 42PX3RVA-ZA)

- 10 -

Item

Market

Broadcasting system

Available channel

Receiving system

Scart Jack(3EA)

Video input(2EA)

S-Video Input(2EA)

Component Input(2EA)

RGB Input(1EA)

HDMI Input(1EA)

Audio Input(4EA)

Audio Output(1EA)

Wired Control

Specification

PAL B/G/I/D/K, SECAM L/L’

BRAND PAL SECAM

VHF/UHF C1~C69

CATV S1~S47

Upper Heterodyne

PAL, SECAM

PAL, SECAM, NTSC

Y/Cb/Cr, Y/Pb/Pr

RGB-PC

RGB-DTV

HDMI-PC

HDMI-DTV

PC Audio(1EA), Component, AV(2EA)

Variable Audio Out

Discrete IR

Remark

4 System : PAL, SECAM, NTSC,PAL60

L/R Input

L/R Output

- 11 -

ADJUSTMENT INSTRUCTIONS

1. Application Object

These instructions apply to the MF-056C Chassis.

2. Specification

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation

transformer will help protect test instrument.

(2) Adjustment must be done in the correct order.

(3) The adjustment must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if

there is no specific designation.

(4) The input voltage of the receiver must keep 100-220V,

50/60Hz.

(5) The receiver must be operated for about 15 minutes prior

to the adjustment.

O After RGB Full white HEAT-RUN Mode, the receiver must

be operated prior to adjustment.

O Enter into HEAT-RUN MODE

1) Press the POWER ON KEY on R/C for adjustment.

2) OSD display and screen display 100% full WHITE

PATTERN.

[ Set is activated HEAT-RUN without signal generator in

this mode.

[ Single color pattern(RED/BLUE/GREEN) of HEAT-RUN

mode uses to check PANEL.

Caution) If you turn on a still screen more than 20 minutes

(Especially digital pattern, cross hatch pattern), after

image may be occur in the black level part of the

screen.

3. Channel memory

3-1. Setting up the LGIDS

1) Install the LGIDS. (idsinst.exe)

2) After installation, restart your PC.

3) Extract [files.zip] to folder [c:\LGIDS\files].

4) Start LGIDS.

3-2. Channel memory Method

1) Select “PDP” and “Hurricane” on Model dialog. And check

your connection in Communication dialog. (If your

connection is ‘NG’, then set your PORT(COM1,2,3,...)

correctly.)

2) Connect RS-232C cable and turn on the power.

(If your connection has completed, you can see “Ready”.)

[ If your set is not an end products but only a board, you

have to make your board to Stand-by state (LED_R). And

you have to Download in Stand_by power state.

3) Select proper CH_memory file(*.nvm) for each model at

[NVRAM Download] $ [Write Batch]

Next, select proper binary file(*.bin) including the CH

information for each model at [NVRAM File].

4) Click the [Download] button.

It means the completion of the CH memory download if all

items show ‘OK’ and Status is changed by ‘PASS’ at the

lower right corner of the window.

5) If you want to check whether the CH information is

memorized correctly or not, click the [Verify] button.

And then compare NVRAM File(*.bin) with the CH

information downloaded.

(Fig. 1)

(Fig. 2)

(Fig. 3)

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