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LG 42PW350 User Manual

LG 42PW350
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Training Manual
42PW350
Pl Di l
42PW350
Pl
asma
Di
sp
l
ay
Advanced Single Scan Troubleshooting
42" Class HD
720p
Plasma TV
42"
Class
HD
720p
Plasma
TV
(41.6" diagonally)
PblihdJ 17
th
2011
P
u
bli
s
h
e
d
J
une
17
th
,
2011
Updated September 06
th
, 2011
See last page for update information

Table of Contents

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LG 42PW350 Specifications

General IconGeneral
3DYes
Depth50.8 mm
Width990.6 mm
Height615 mm
Weight20000 g
HD typeNot supported
Tuner typeAnalog & digital
Pixel pitch- mm
Smart modesCinema, Game, Sports, Standard, Vivid
Audio systemInfinite Sound
HDMI version1.3
Package depth228.6 mm
Package width1085 mm
Product colorBlack
Package height749.3 mm
Package weight23500 g
Cables includedAC
RMS rated power20 W
AC input voltage100 - 240 V
Display diagonal41.6 \
AC input frequency50 - 60 Hz
Built-in subwooferNo
Depth (with stand)231 mm
Display brightness1500 cd/m²
Display resolution1024 x 768 pixels
Display technologyPlasma
Number of speakers2
HDMI ports quantity3
Height (with stand)668 mm
Placement supportedHorizontal
Weight (with stand)21500 g
Supported video modes1080i, 1080p, 720p
USB 2.0 ports quantity1
Number of OSD languages4
Power consumption (max)107 W
S-Video inputs quantity0
Contrast ratio (dynamic)3000000:1
Contrast ratio (typical)-
Panel mounting interface400 x 400 mm
Annual energy consumption- kWh
Screen format adjustments4:3, 16:9, Zoom
Analog signal format systemNTSC
Power consumption (standby)0.2 W
Digital signal format systemATSC
Supported graphics resolutions1024 x 768 (XGA)
On Screen Display (OSD) languagesENG, ESP, FRE, KOR
Consumer Electronics Control (CEC)Anynet+

Summary

42PW350 Plasma Display

Advanced Single Scan Troubleshooting

Covers troubleshooting for the 42PW350 Advanced Single Scan Plasma Display.

TOPICS TO BE DISCUSSED

Circuit Board Troubleshooting

Circuit board operation, troubleshooting, and alignment procedures.

Overview of Topics to be Discussed

Contact Information and Safety Precautions

Covers contact details and essential safety precautions for users and technicians.

Disassembly and Board Identification

Familiarizes technicians with disassembly, identification, and layout of the plasma panel.

IMPORTANT SAFETY NOTICE

General Safety Precautions

Details information for qualified personnel, warns about modifications, and grounding.

Servicing Cautions

Advises disconnecting power before servicing and highlights weight hazards.

Safety & Handling Regulations

Handling and Adjustment Regulations

Lists regulations for adjustments, voltage checks, static electricity, and PDP module handling.

Basic Troubleshooting Steps

Troubleshooting Methodology

Explains the four-step process: Define, Localize, Isolate, and Correct.

42PW350 Specifications

Generic Plasma USB Automatic Software Download Instructions

Software Download and Copying

Instructions for downloading software files and copying them to a USB flash drive.

Software Upgrade Process

Steps for inserting the USB drive and initiating the TV software upgrade process.

Accessing the Service Menu

Service Menu Access Procedure

Details required remote, button presses, and password entry to access the Service Menu.

SERVICE AND ADJUST MENU ITEMS

42PW350 Service Menu First Page

Adjust Check Options

Details options within the Adjust Check menu, including Country Group and Tool Options.

White Balance and ADC Adjustments

Explains adjustments for White Balance, ADC, and EDID settings.

42PW350 Power Off Status (IN START) Screen

42PW350 Service Menu: Panel Control Shows Control Board Information

42PW350 Model Number Download Screen

Changing Model and Serial Number

Instructions for changing the Model Number and Serial Number in the Service Menu.

42PW350 Power Error History (IN START) Screen

Accessing the Host Diagnostic Screen (Page 1 of 2)

3D SECTION AND 3D TROUBLESHOOTING

Understanding 3D Technology

Provides an understanding of 3D technology as it relates to televisions.

LG 3D TV 3D broadcasting

3D Settings Menu

42PW350 3D Troubleshooting Flow Chart Page 1 of 3

Initial 3D Playback Check

Guides on how to play a 3D movie and perform an initial glasses sync test.

Troubleshooting 3D Sync Issues

Provides steps to troubleshoot issues related to 3D sync, including checking connections.

42PW350 3D Troubleshooting Flow Chart Page 2 of 3

Checking 60Hz Sync Signal

Details how to check for the 60Hz sync signal on the motion remote board.

Checking P1404 Connector Pins

Guides on checking specific pins on the P1404 connector for correct voltage levels.

42PW350 3D Sync Troubleshooting Flow Chart Page 3 of 3

Checking 3D_SYNC Line

Instructs on checking the 3D_SYNC line on various control board points.

DISASSEMBLY SECTION

Understanding Disassembly Procedures

Introduces the section covering disassembly, layout, and identification of circuit boards.

Removing the Back Cover

Back Cover Removal Steps

Provides instructions on removing the back cover, including screw count and attention to detail.

Circuit Board Layout Identifying the Circuit Boards

Circuit Board Layout Diagram

Illustrates the layout of the main circuit boards within the TV.

Identification of Key Circuit Boards

Labels and identifies major circuit boards like Y-SUS, Z-SUS, Main Board, etc.

42PW350 Connector Identification Diagram

Panel Connector Identification

Details connectors for the Panel, including part numbers.

Board-to-Board Connector Identification

Identifies connectors between various boards like Y-SUS, SMPS, Control, and X-Boards.

Disassembly Procedure for Circuit Board Removal

Switch Mode Power Supply Board Removal

Steps for disconnecting and removing the SMPS board, including voltage readjustment.

Y-SUS Board Removal

Instructions for removing the Y-SUS board, including connector disconnect and voltage readjustment.

Disassembly Procedure for Circuit Board Removal (2)

Z-SUS Board Removal

Steps for removing the Z-SUS board, including voltage readjustment.

Main Board Removal

Instructions for disconnecting and removing the Main board.

X Drive Circuit Board Removal Continued

X-DRIVE LEFT OR X-DRIVE RIGHT REMOVAL

Detailed steps for removing the X-Drive boards, including heat sink and screw removal.

Left and Right X Drive Connector Removal

TCP (Tape Carrier Package) Generic Removal Precautions

CIRCUIT OPERATION, TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION

Understanding Circuit Operations

Aims for technicians to understand circuit operations, adjustments, and failure troubleshooting.

42PW350 Signal and Voltage Distribution Block

SMPS Turn On Sequence

Details the sequence of signals for turning on the SMPS and related voltages.

Voltage Distribution Overview

Illustrates voltage distribution from SMPS, Z-SUS, Y-SUS, Control, and X-Boards.

Adjustment Notice

DC Voltage Adjustment Order

Specifies the critical order for DC voltage adjustments, especially after board replacement.

SWITCH MODE POWER SUPPLY SECTION

SMPS Troubleshooting and Operation

Covers troubleshooting, voltage, and test points for the Switch Mode Power Supply (SMPS).

Switch Mode Power Supply Overview

42PW350 SMPS Layout Drawing

Power Supply Circuit Layout

SMPS Circuit Component Layout

Illustrates the layout of the power supply circuit, identifying fuses, regulators, and sources.

Power Supply Basic Operation

42PW350 Television Turn On Sequence

Power On Sequence Diagram

A block diagram illustrating the sequence of signals and power-up steps.

Power Supply Va and Vs Adjustments

Importance of Va and Vs Adjustments

Emphasizes that Power Supply adjustments are critical and must be performed first.

Va and Vs Adjustment Procedure

Details how to perform Va and Vs adjustments using a voltmeter and panel label.

42PW350 Power Supply Static Test with Light Bulb Load

Static Test with Load Procedure

Describes performing a static test on the power supply using light bulbs as a load.

Power Supply Static Test (Forcing on the SMPS in stages)

Sequential SMPS Power-Up Test

Details how to test the SMPS sequentially by forcing power-up stages with resistors.

P813 SMPS Connector Identification, Voltages and Diode Check

P813 Connector Pinout and Voltages

Provides pin identification, STBY/Run voltages, and diode check readings for P813.

P811 & SC101 SMPS Connector Identification, Voltages and Diode Check

P811 Connector Pinout and Voltages

Details pinout, voltages, and diode check for the P811 SMPS connector.

Z-SUS SECTION

Z-SUS Board Operation and Testing

Covers Z-SUS board operation, locating test points for voltage and diode checks.

Z-SUS Block Diagram

Simplified Z-SUS Sustain Board Diagram

A block diagram showing the Z-SUS board's interaction with other components.

Z-SUS Board Component Identification

42PW350 Z-SUS Layout Drawing

Z-SUS Waveform

Z-SUS Waveform Analysis

Explains Z-SUS waveforms (SUSTAIN, ERASE) and their relation to Z-Bias adjustment.

VZB (Z-Bias) VR1 Adjustment

Z-Bias Adjustment Procedure

Guides on performing the Z-Bias adjustment using VR1, referencing panel label and heat run mode.

P7 Connector to SMPS P811 Voltages and Diode Checks

P2 Connector to Y-SUS P206 Voltages and Diode Checks

P6 Connector to Control P2 Voltages and Diode Checks

Testing the Z-SUS without the Y-SUS (Stand-Alone)

Stand-Alone Z-SUS Test Procedure

Step-by-step guide for testing the Z-SUS, SMPS, and Control board without the Y-SUS.

Y-SUS BOARD SECTION (Overview)

Y-SUS Board Operation and Testing

Covers Y-SUS board operation, locating voltage and diode mode test points.

Y-SUS Block Diagram

Simplified Y-SUS Sustain Board Diagram

A block diagram showing the Y-SUS board's role in generating Y-Sustain and Y-Drive signals.

Y-SUS Board Layout

42PW350 Y-SUS Layout Drawing

-VY Adjustment

-Vy Adjustment Procedure

Guides on performing the -Vy adjustment using VR502, referencing panel label and heat run mode.

Y-Drive Signal Overview

Observing (Capturing) the Y-Drive Signal for Set Up Adjustment

Capturing Y-Drive Waveforms

Explains how to capture and observe Y-Drive waveforms for adjustment purposes.

Set Up and Set Down Adjustments

SET-UP ADJUST: VR601

Instructions for adjusting VR601 to match the SET-UP waveform.

SET-DN ADJUST: VR401

Instructions for adjusting VR401 to match the SET-DN waveform.

Y-SUS Board Troubleshooting Y-Scan

Y-Scan Signal Test Points

Explains how to test the Y-Scan signal, cautioning against using C213 for adjustments.

Y-SUS Floating Ground (FG 15V, FG 5V) and 18V Checks and Test

Y-DRIVE BOARD SECTION (Y-Drive Explained)

Y-Drive Buffer Troubleshooting

CONTROL BOARD SECTION

Control Board Pictorial

42PW350 Control Board Layout Drawing

Control Board Testing Procedures

Instructions for testing the Control Board's 5V supply and video output.

Control Board Signal (Simplified Block Diagram)

P106 Control Board LVDS Signals

X BOARD (LEFT and RIGHT) SECTION

X Board TCP Heat Sink Warning

TCP Heat Sink Importance

Warns against running the TV with the heat sink removed, as it protects the TCPs.

TCP 3.3V B+ Check

TCP Visual Observation. Damaged TCP

MAIN BOARD SECTION

Main Board Overview

Describes the Main Board's components, functions, tuner, and software upgrades.

Main Board Layout and Identification

P501 Main Board Plug to Power Supply Voltages and Diode Check

P1401 Main Board LVDS Video Signal Test Points

MOTION REMOTE and 3D SYNC BOARD SECTION

42PW350 (42T3 Panel) CIRCUIT INTERCONNECT DIAGRAM

SMPS to Board Connections

Shows connections from SMPS to various boards (Z-SUS, Y-SUS, Control, X-Boards).

Board to Board Signal Routing

Illustrates signal paths and connections between Y-SUS, Y-Drive, and Panel.

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