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LG RZ-27LZ55 User Manual

LG RZ-27LZ55
37 pages
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LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : ML-041A
MODEL RZ-27LZ55
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
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LG RZ-27LZ55 Specifications

General IconGeneral
I/O ports2 x SCART, DVI-I, S-Video.
Comb filterDigital
Response time8 ms
Display diagonal27 \
Display brightness550 cd/m²
Display resolution1366 x 768 pixels
Contrast ratio (typical)1000:1
Channels quantity100 channels
Analog signal format systemNTSC, PAL, SECAM

Summary

Product Safety

Important Safety Notice

General warnings for safe servicing and product use.

General Guidance for Servicing

Advice on isolation transformers and component handling.

Leakage Current Checks

Procedures for cold and hot leakage current testing.

Servicing Precautions

General Servicing Guidelines

Guidelines for unplugging, testing, cleaning, and handling components safely.

Handling Electrostatic Sensitive Devices

Techniques to prevent damage to ES components.

Soldering Techniques and Safety

Recommendations for proper soldering techniques and tools.

Specifications

Application and Test Requirements

Chassis applicability, test conditions, and general specs overview.

TV System, RF, and Optical Specs

Details video systems, RF channels, optical features, and functions.

Input Modes and Features

Component video, PC input modes, and general features.

Adjustment Instruction

Setup and General Adjustments

Covers application, designation, signal composition, and screen adjustments.

Signal Adjustments and EDID

Details video/component gain/offset and EDID settings.

Shipping Conditions

Initial Power and Picture Settings

Specifies default power, volume, and picture settings for shipping.

Sound, Special, and PC Settings

Outlines default sound, special features, and PC input settings.

Option Data Settings

Option 1 and 2 Settings

Configuration options for various inputs and features.

Option 3 Settings

Settings for language, text language, optimization, and DDCi.

Service Remote Control Functions

Remote Control Key Functions

Explains the function of each key on the service remote.

Remote Adjustment Keys

Details keys used for entering adjustment modes and settings.

Troubleshooting

Power and Raster Troubleshooting

Flowcharts for diagnosing no power and initial no raster issues.

Raster and Sound Troubleshooting

Flowcharts for raster on specific signals and no sound.

Block Diagram

System Block Diagram Overview

Visual representation of the TV's main functional blocks.

Block Diagram Description

Video Signal Processing Description

Explains video signal flow from input to LCD module.

Power Supply Description

Describes the power supply voltages and their distribution.

Wiring Diagram

Wiring Diagram and Parts List

Illustrates connections and lists associated part numbers.

Exploded View

Component Layout Illustration

Illustrates the physical layout of major TV components.

Exploded View Parts List

Part Identification and Descriptions

Lists part numbers and descriptions for exploded view components.

Replacement Parts List

Capacitors and Resistors

Detailed list of capacitors and resistors with part numbers.

Diodes, ICs, and Coils

Lists diodes, ICs, coils, and inductors with part numbers.

Transistors, FETs, and Resistors

Lists transistors, FETs, and resistors with part numbers.

Board-Specific Parts

Lists parts for LED/SW board and Side A/V board.

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