Philips LC260WX2, LC320W01, LC320WX2, LC420WU2, LC420WX2 Service Manual

Colour Television

Module

LPL (LG Philips) LCD 2k7

LC260WX2

LC320W01

LC320WX2

LC420WU2

LC420WX2, LC420WX3, LC420WX5

LC470WU1, LC470WU4

Contents		Page
1.	Technical Specifications, Connections, and Chassis
	Overview	2
2.	Safety Instructions, Warnings, and Notes	3
3.	Directions for Use	4
4.	Mechanical Instructions	5

5.Service Modes, Error Codes, and Fault Finding 31

6.Block Diagrams, Test Point Overviews, and

	Waveforms	32
7.	Circuit Diagrams and PWB Layouts	32
8.	Alignments	32
9.	Circuit Descriptions, Abbreviation List, and IC Data
	Sheets	32
10.	Spare Parts List	32
11.	Revision List	32

©Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by MW 0767 BG CD Customer Service

Printed in the Netherlands

Subject to modification

EN 3122 785 16890

EN 2

1.

LCD LPL 2K7

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1Introduction

1.2General

1.3Specifications

Note:

• Specifications are indicative (subject to change).

1.1Introduction

In this Service Manual you will find all necessary information to perform the Board Level Repair (= board swap) scenario on LCD panels. These LCD repair manuals are created per brand, and they will contain all necessary information for the different panels used in Philips flat LCD TVs.

1.2General

Number of

order progress.

The Marking position could be different each model of T-Con or inverter P/N.

This picture is different from origin model.

Please Use it only as a reference.

T-CON Board

Case 1

Case 2

Inverter

(Master)

(Slave)

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Figure 1-1 LPL board labelling

1.3Specifications

Below find attached the data sheets of the different LCD panels. Click on the “model number” to open.

•Model LC260WX2

•Model LC320W01

•Model LC320WX2

•Model LC420WU2

•Model LC420WX2

•Model LC420WX3

•Model LC420WX5

•Model LC470WU1

•Model LC470WU4

Safety Instructions, Warnings, and Notes

LCD LPL 2K7

2.

EN 3

2. Safety Instructions, Warnings, and Notes

Index of this chapter:

2.1General

2.2Safety Precautions

2.3Servicing Precautions

2.1General

Notes:

•Only authorised persons should perform servicing of this module.

•When using/handling this unit, pay special attention to the LCD Module: it should not be enforced into any other way then next rules, warnings, and/or cautions.

•"Warning" indicates a hazard that may lead to death or injury if the warning is ignored and the product is handled incorrectly.

•"Caution" indicates a hazard that can lead to injury or damage to property if the caution is ignored and the product is handled incorrectly.

2.2Safety Precautions

2.2.1Warning

•Do not supply a voltage higher than specified to this product. This may damage the product or can create hazardous situations.

•Do not use this product in locations where the humidity is extremely high, where it may be splashed with water, or where flammable materials surround it.

•Do not install or use the product in a location that does no satisfy specified environmental conditions. This may damage the product or can create hazardous situations.

•If a foreign substance (such as water, metal, or liquid) gets inside the product, immediately turn “OFF” the power. Continuing to use the product may cause electric shock or can create hazardous situations.

•If the product emits smoke and abnormal smell, or makes an abnormal sound, immediately turn “OFF” the power. Continuing to use the product may cause electric shock or can create hazardous situations.

•Do not (dis)connect the connector while power to the product is “ON”. It takes some time for the voltage to drop to a sufficiently low level after the power has been turned “OFF”. Confirm that the voltage has dropped to a safe level before (dis)connecting the connector.

•Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause electric shock.

•If the power cable is damaged, or if the connector is loose, do not use the product, otherwise, this can lead to hazardous situations or may cause electric shock.

•The LCD Backlight Inverter unit uses a high voltage for the lamps. Keep the cautions concerning electric shock and do not touch the device circuitry handling the inverter unit. And because the capacitors of the device circuitry may remain charged at the moment of Power “OFF”, standing for 1 minute is required in order to discharge the device circuitry.

2.2.2Caution

•Do not place this product in a location that is subject to heavy vibration, or an unstable surface such as an inclined surface. The product may fall off or fall over, causing injuries.

•Before disconnecting cable from the product, be sure to turn off the power. Be sure to hold the connector when disconnecting cables. Pulling a cable with excessive force may cause the core of the cable to be exposed or break the cable, and this can lead to fire or electric shock.

•This product contains glass. If shock, vibration, heat or distortion is applied to the product, the glass may be broken.

•If glass surface of the display breaks or is scratched, do not touched the broken pieces or the scratched with bare hands. You may be injured.

•LCD Module requires to be handled with special care. LCD Module is not to be touched with metal or hard materials. Must not be stressed by heat or mechanical impact.

•There are some particular components on the rear panel of this product. Skin contact with these components may cause an electric shock. So, handle with care.

•While moving the product, be sure to turn off the power, disconnect all cables and watch your step. Dropping the product may cause injuries from electric shock. So, while moving the product handle with care.

•When cleaning the panel is necessary, wipe it with a soft and moistened cloth a neural detergent. Caution on connector area. Do not use chemicals such as thinner or benzene.

•LCD Module emits heat from the Lamp, Backlight lamp, and component parts. Therefore, the environmental temperature must not exceed 50 deg. C. LCD Module Backlight Inverter system is driven by high voltage, so it must avoid conductive materials.

•If repairing components with a lead line, high voltage or high temperature components must be put out from a lead line and fix.

•Do not place an object on the surface of the display. The glass may break or be scratched.

•This product may be damaged if it is subject to excessive stresses (such as excessive voltage, current, or temperature). The absolute maximum ratings specify the limits of these stresses.

•Do not cover or wrap with any covering materials while power is applied to the product.

•This product is made from various materials such as glass, metal, and plastic. When discarding it, be sure to contact a purchase place.

•If a discrepancy occurs due to any arbitrary modification or disassembly, supplier is not responsible for function, quality or other items.

•Within the warranty period, general faults may be charged for depending on responsibility for the faults. You handle with care

2.3Servicing Precautions

A colour TFT LCD Module can easily be damaged by both electrical and mechanical stresses. Users therefore, are requested to follow the “Servicing precautions of colour TFT LCD Module” on the following.

2.3.1System Assembler

•Follow the power sequence: An abnormal power sequence may cause critical malfunction or electrical damage.

•Prevent physical stress.

•Prevent overheat:

–High temperatures on the surface of the screen may cause poor quality. Please use the LCD Module on the specified temperatures.

–Low temperatures (under 10 deg. C) makes the LCD Module respond slowly, make the Backlight worse operated, and will shorten very much the lifetime accordingly.

•Keep LCD Module dust-free: The LCD Module is sensitive against dust; it can cause visual or functional problems.

EN 4

3.

LCD LPL 2K7

Directions for Use

•Do not touch TCP area: Do not touch TCP area at any case. It can cause Driver IC cracks, film cracks, etc. The TCP is the weakest point of the LCD Module.

•Do not pull Backlight wire: Please do not pull the Backlight wire, as it can cause the wire to become disconnected or damaged.

•Check the connections of the Inverter & Backlight connectors: Incomplete connection can cause burnt in Backlight connectors or damage the inverter.

•Handle with care:

–Please do not drop, bend, or hit the LCD Module.

–Physical stress can cause defects as broken panels.

•Keep mounting screw length and motor driver’s torque: Strong motor driver’s torque can make a mechanical defect on LCD Module. Please keep within the specifications.

•Do not operate for a long time under the same pattern:

Operating the LCD Module for a long time with the same video pattern can cause image persistence and can eventually damage it.

•Defective panels must also be handled with care:

–To prevent making other defects, please handle the defective LCD Module as a good one.

–Defective LCD Modules must be repaired.

•Do not stack LCD Modules: The LCD Module consists of fragile components such as TCPs or Glasses. Stacking the LCD Modules can cause undesired defects.

•Do not provide strong pressure at connecting: Strong pressure can transfer the force to the TCP, which is the weakest part of the LCD Module. It eventually can make the TCP crack or lead to other unexpected defects.

•Let the Backlight Wire at the backside of the LCD Module: If let the Backlight wire in front of the LCD Module, the Backlight connector can hurt the surface of the polariser.

•Never (dis)connect at power “ON”: The LCD Module consists of CMOS components, which are known as weak components against EOS. It can damage the product.

•Electrostatic discharge can make damage:

–Semi-assembled product should be handled with wrist strap.

–Earth human body when handle the LCD Module.

–Please do not touch the interface connector pin.

2.3.2System Assembler/End User

•Keep clean the surface:

–Please wear rubber gloves when you touch the surface of the LCD Module screen.

–Please use soft and anti-static material with n-Hexane as cleaner.

•Be careful not to make polariser scratch:

–Surface of polariser is soft, so it’s easily scratched.

–Please do not touch, press or rub on polariser surface with materials over HB hardness.

•Be careful with swift temperature and humidity changes: Swift temperature and or humidity change can make dew condensation or ice, which can cause nonconformance such as malfunctioning.

•Keep out of water:

–Water on in the LCD Module can cause electrical short or corrosion.

–Please wipe out or dry water carefully.

•Keep the LCD Module free from corrosive gasses:

Corrosive gas can chemically damage the polariser and the circuitry parts and eventually will cause defects.

•Keep the suitable temperature and humidity: High temperatures and high humidity will shorten the lifetime

3. Directions for Use

Not applicable.

Mechanical Instructions

LCD LPL 2K7

4.

EN 5

4. Mechanical Instructions

Index of this chapter:

4.1General

4.2Model LC260WX2

4.3Model LC320W01

4.4Model LC320WX2

4.5Model LC420WU2

4.6Model LC420WX2

4.7Model LC420WX3

4.8Model LC420WX5

4.9Model LC470WU1

4.10Model LC470WU4

4.1General

4.1.1Warnings

•Figures can deviate due to the different module executions.

•During repair, place the set face down on a soft surface (e.g. on foam bars as mentioned in next paragraph), in order to prevent damaging the display.

Note: With some chassis, it is possible to measure and replace the boards while the TV is still on its stand.

•All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD ). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential.

H_16920_001.eps

060407

Figure 4-1 ESD wristband

•Be careful during measurements in the high voltage section. Never pull plugs out under operation conditions, just to prevent danger caused by electrical sparks.

•Never replace modules or other components while the unit is switched “on”.

•Connectors “to” and “from” the Inverter Boards must be thoroughly connected to avoid any electrical sparks during operation.

4.1.2Foam Bars

1

1Required for sets

42"

E_06532_018.eps

171106

Figure 4-2 Foam bars

The foam bars (order code 3122 785 90580 for two pieces) can be used for all types and sizes of flat displays. See figure “Foam bars” for details. Displays with a size of 42” and larger, require four foam bars [1]. Ensure that the foam bars are always supporting the cabinet and never only the display. Caution: Failure to follow these guidelines can seriously damage the display!

By laying the TV face down on the (ESD protective) foam bars, a stable situation is created to perform measurements and alignments. By placing a mirror under the display, you can monitor the screen.

4.1.3Torque Values

Table 4-1 Recommended Torque Values

Screw Type (cross head)	Recommended Torque Value
M2	2.0 kg*F ± 0.1 kg*F
M2.5	3.0 kg*F ± 0.5 kg*F
M2.6	3.0 kg*F ± 0.5 kg*F
M3	6.0 kg*F ± 0.5 kg*F

EN 6

4.

LCD LPL 2K7

Mechanical Instructions

4.2Model LC260WX2

4.2.1Control Board (T-CON Board)

MODEL: LC260WX2-SLB2

Prepare the LCM.

Separate the Screw(4EA)

Separate the Cover Shield

Separate the FFC(60pin).

Separate the T-CON Board.

Replace of T-CON Board and Assemble the FFC(60pin).

* Guide Pin station keeping check.

Attach the Cover Shield and	Check the FFC(60pin).
Assemble the Screw(4EA).

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Figure 4-3 Replacement instructions T-CON board

4.2.2Inverter (Master) Board

Prepare the LCM.

Mechanical Instructions

LCD LPL 2K7

4.

EN 7

MODEL: LC260WX2-SLB2

Separate the Screw(3EA)

Separate the Cover Shield

Unlock of Connector and	Separate the FFC(11pin).	Separate the Inverter.
sperate the Wire Connector(2pin).

Attach the Cover Shield and	Assemble the Wire Connector(2pin).	Replace of Inverter and
Assemble the Screw(3EA).		Assemble the FFC(11pin).

H_16890_029.eps

230507

Figure 4-4 Replacement instructions Inverter (master) board

EN 8

4.

LCD LPL 2K7

Mechanical Instructions

4.2.3Inverter (Slave) Board

MODEL: LC260WX2-SLB2

Prepare the LCM.

Separate the Screw(3EA)

Separate the Cover Shield

Unlock of Connector and	Separate the FFC(11pin) .	Separate the Inverter.
sperate the Wire Connector(2pin).

Attach the Cover Shield and

Assemble the Wire Connector(2pin).

Replace of Inverter and

Assemble the Screw(3EA).

Assemble the FFC(11pin).

H_16890_030.eps

230507

Figure 4-5 Replacement instructions Inverter (slave) board

4.3Model LC320W01

4.3.1Control Board (T-CON Board)

Prepare the LCM.

Mechanical Instructions

LCD LPL 2K7

4.

EN 9

MODEL: LC320W01-B6K1

Separate the Screw(4EA)

Separate the Cover Shield

Separate the FFC(50pin).

Separate the T-CON Board.

Replace of T-CON Board and Assemble the FFC(50pin).

* Guide Pin station keeping check.

Attach the Cover Shield and	Check the FFC(50pin).
Assemble the Screw(4EA).

H_16890_025.eps

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Figure 4-6 Replacement instructions T-CON board

EN 10

4.

LCD LPL 2K7

Mechanical Instructions

4.3.2Inverter (Master) Board

MODEL: LC320W01-B6K1

Prepare the LCM.

Separate the Screw(3EA)

Separate the Cover Shield

Unlock of Connector and	Separate the FFC(8pin).	Separate the Inverter.
sperate the Wire Connector(2pin).

Attach the Cover Shield and	Assemble the Wire Connector(2pin).	Replace of Inverter and
Assemble the Screw(3EA).		Assemble the FFC(8pin).

H_16890_026.eps

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Figure 4-7 Replacement instructions Inverter (master) board