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Samsung LE27S71B Service Manual

Samsung LE27S71B
160 pages
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TFT-LCD TV
Chassis GSM27SE
GSM32SE
GSM37SE
GSM40SE
Model LE27S71B
LE32S71B
LE37S71B
LE40S71B
Manual
SERVICE
TFT-LCD TV Fashion Feature
- Luxurious Slim Design
- Supreme Picture Quality
- Supreme Sound Quality
- Supreme Convenience Quality
- Convenience for Users

Table of Contents

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Samsung LE27S71B Specifications

General IconGeneral
Screen Size27 inches
Resolution1366 x 768
Contrast Ratio3000:1
Brightness500 cd/m²
Response Time8 ms
Aspect Ratio16:9
Power Consumption120 W
HD Format720p (HD Ready)
Viewing Angle178° (horizontal), 178° (vertical)
Input PortsHDMI, Component, Composite, S-Video

Summary

Precautions

1-1 Safety Precautions

Follow safety, servicing, and ESD precautions to prevent damage and hazards.

1-2 Servicing Precautions

Warning about electrolytic capacitor polarity; read safety precautions before servicing.

1-3 Static Electricity Precautions

ESD precautions for handling sensitive devices to prevent damage.

1-4 Installation Precautions

Safety measures for installing the TV.

Product Specifications

2-1 Fashion Feature

Highlights key aesthetic and performance features of the TV.

2-2 LE27S71B Specifications

Detailed technical specifications for the LE27S71B model.

2-3 LE32S71B Specifications

Detailed technical specifications for the LE32S71B model.

2-4 LE37S71B Specifications

Detailed technical specifications for the LE37S71B model.

2-5 LE40S71B Specifications

Detailed technical specifications for the LE40S71B model.

2-6 Spec Comparison

Comparison of specifications across different TV models.

2-7 Option Specification

List of optional accessories and their part codes.

Alignments and Adjustments

3-1 Service Instruction

General guidelines for performing service adjustments and calibration.

3-2 How to Access Service Mode

Instructions for entering the TV's service or factory mode.

3-3 Factory Data

Lists various factory data settings, including Calibration, Option Table, White Balance, SVP-FX, and Adjust.

3-4 Service Adjustment

Details on performing service adjustments like white balance calibration and adjustment.

3-5 Software Upgrade

Instructions on how to update Flash ROM using Flash Downloader.

Troubleshooting

4-1 First Checklist for Troubleshooting

Initial troubleshooting steps involving cable connections, power input, and voltage checks.

4-2 Checkpoints by Error Mode

Diagnostic checkpoints for troubleshooting common error modes like "No Power".

4-2-2 No Video (Analog PC)

Troubleshooting flowchart for "No Video" issues when using an Analog PC input.

4-2-3 No Video (Digital-HDMI)

Troubleshooting flowchart for "No Video" issues with HDMI input.

4-2-4 No Picture (Tuner_CVBS)

Troubleshooting flowchart for "No Picture" issues when using Tuner/CVBS input.

4-2-5 No Picture (Video_CVBS)

Troubleshooting flowchart for "No Picture" issues with Video_CVBS input.

4-2-6 No Picture (S-VIDEO_Y,C)

Troubleshooting flowchart for "No Picture" issues with S-Video input.

4-2-7 No Sound

Troubleshooting flowchart for "No Sound" issues.

Exploded View and Parts List

5-1 LE27S71B Exploded View

Exploded view diagram showing the assembly of the LE27S71B model.

5-2 LE27S71B Parts list

List of parts for the LE27S71B model, including location, code, item name, quantity, and remarks.

Electrical Parts List

6-1 LE27S71B Parts List

Detailed list of electrical components for the LE27S71B model, organized by level and location.

6-2 Electrical Parts List

Continuation of electrical parts list, detailing connectors and diodes.

6-5 Electrical Parts List

Continuation of electrical parts list, detailing resistors.

Block Diagram

7-1 Block Diagram

High-level block diagram of the TV's main functional blocks and signal flow.

Wiring Diagrams and Pin Assignments

8-1 LE27S71B / LE32S71B / LE37S71B / LE40S71B Wiring Diagram

Wiring diagram for the main board, showing connector pin assignments for various models.

8-2 Main Board Layout

Layout diagram of the main board, indicating the location of major components and connectors.

8-3 PIN characteristic

Pin characteristics for CN800 (Main Board power supply) and CN600/CN601 (Speaker Connector).

8-5 CN503-LVDS Signal

Pin assignments for the CN503 connector, which carries LVDS signals for the LCD panel.

8-7 CN801 - AC Input

Pin definitions for the CN801 AC input connector.

8-8 CN802 - Inverter power supply

Pin definitions for the CN802 connector, related to inverter power supply and panel dimming.

Schematic Diagrams

9-1 Power_Sound Schematic Diagram

Schematic diagram illustrating the power and sound sections of the TV.

9-2 Schematic Diagram

Schematic diagram showing SCART, Component, PC, HDMI, and AV input connections.

9-3 Micom Schematic Diagram

Schematic diagram of the Micom (microcomputer) block, including main and sub-micom sections.

9-4 SVP-PX/PX-Power/LBE-Option Schematic Diagram

Schematic diagram for SVP-PX, PX-Power, and LBE-Option blocks, detailing signal processing.

Operating Instructions and Installation

10-1 Front Panel Controls

Diagram of the TV's front panel, identifying controls like Source, Menu, Volume, and Power.

10-2 Connection Panel

Diagrams illustrating the rear and side panel connections for different TV sizes.

10-3 Remote Control

Diagram and explanation of the remote control buttons and their functions.

10-4 Installing the Stand

Step-by-step instructions for attaching the TV stand.

10-5 Installing the Wall Mount Kit

Information on installing a wall mount kit, advising to check separate instructions.

Disassembly and Reassembly

11-1 Disassembly

Procedures for disassembling the TV, emphasizing safety precautions for ESD components and cabinet removal.

11-2 Reassembly

Reassembly procedures are the reverse of disassembly procedures.

PCB Diagram

12-1 26" Main PCB Diagram

Diagram showing the layout of the main PCB for a 26-inch model.

12-2 32", 37", 40" Main PCB Diagram

Diagram showing the layout of the main PCB for 32", 37", and 40-inch models, with key ICs labeled.

12-3 26" SMPS

Image of the 26-inch SMPS (Switching Mode Power Supply) board.

12-5 40" IP Board

Image of the 40-inch IP (Inverter/Power) Board.

Circuit Descriptions

13-1 Block description

Overview of the TV's main functional blocks: Main board, IP board, and T-con board.

13-2 Main Block

Detailed block diagram of the SVP-PX line-up, showing signal flow from inputs to outputs.

13-3 SMPS Board

Block diagram of the SMPS board for 26"/32" models, detailing power stages.

Reference Information

14-1 Technical Terms Glossary

Glossary of technical terms used in the manual, such as TFT-LCD, ADC, PLL, Inverter, and AC Adapter.

14-2 Pin Assignments

Pin details for various connectors like DVI-D, Component, S-Video, D-SUB, SCART.

14-3 Timing Chart

Timing specifications for LCD panel and supported PC modes.

14-4 Panel Description

Table listing panel manufacturers, vendor P/N, panel code, panel ABB, sticker code, and remarks.

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