LG 32LD350 - TRAINING MANUAL.pdf - Instrukcje - zabmar

720P

32LD350

720P

Direct View LCD

Training

32LD350

Direct View LCD

32LD350

Direct View LCD

LCD-DV Troubleshooting

32" Class HD 720P

LCD TV (31.5" diagonally)

Published November 16 th , 2010

Updated February23rd, 2011

OUTLINE

Preliminary Section:

Contact Information, Preliminary Matters, Specifications,

LCD Overview, General Troubleshooting Steps,

Signal Distribution, Disassembly Instructions and Voltages

Disassembly Section: Removal of Circuit Boards

Troubleshooting Section: Board Operation Troubleshooting of :

• Switch Mode Power Supply

• Ballast (Backlight Driver)

•

Main Board

• Ft Control Board

• Key Board

• Speakers

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32LD350

Overview of Topics to be Discussed

32LD350 LCD Direct View Display

Section 1

This Section will cover Contact Information and remind the Technician of Important

Safety Precautions for the Customers Safety as well as the Technician and the

Equipment.

Basic Troubleshooting Techniques which can save time and money sometimes can

be overlooked. These techniques will also be presented.

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This Section will get the Technician familiar with the Disassembly, Identification and

Layout of the LCD Display Panel.

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At the end of this Section the Technician should be able to Identify the Circuit Boards

and have the ability and knowledge necessary to safely remove and replace any

Circuit Board or Assembly.

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32LD350

Preliminary Matters (The Fine Print)

IMPORTANT SAFETY NOTICE

IMPORTANTSAFETYNOTICE

The information in this training manual is intended for use by persons possessing an adequate background in

electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product,

personal injury and property damage can result. The manufacturer or seller maintains no liability for the

interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this

product, under no circumstances should the original design be modified or altered without permission from LG

Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or

user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for

user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for

service, they must be returned to their original positions and properly fastened.

CAUTION

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for

diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be

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aware that many household products present a weight hazard. At least two people should be involved in the

installation or servicing of such devices. Failure to consider the weight of an product could result in physical

injury.

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32LD350

ESD Notice

(Electrostatic Static Discharge)

Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage

the electronics in a manner that renders them inoperative or reduces the time until their next failure.

Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively,

you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before

removing a replacement part from its package, touch the anti-static bag to a ground connection point or

removing a replacement part from its package, touch the anti static bag to a ground connection point or

unpainted metal in the product. Handle the electronic control assembly by its edges only. When

repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

Regulatory Information

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

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interference when the equipment is operated in a residential installation. This equipment generates, uses,

and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction

manual, may cause harmful interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause harmful interference to

radio or television reception which can be determined by turning the equipment off and on the user is

radio or television reception, which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate

the receiving antenna; Increase the separation between the equipment and the receiver; Connect the

equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the

dealer or an experienced radio/TV technician for help.

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LG 32LD350 - TRAINING MANUAL.pdf

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