Haier LE32F2220a User Manual

SERVICE MANUAL
LED TV
Chassis
MSD3391
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury
or death.
WARNING
LE32F2220a
Model No.

Haier LE32F2220a Specifications

General

Screen Size	32 inches
Display Type	LED
HDMI Ports	2
USB Ports	1
Weight	4.5 kg
Display Resolution	HD
Display Technology	LED
Aspect Ratio	16:9
Refresh Rate	60 Hz
Built-in Wi-Fi	No
Smart TV	No
Resolution	1366 x 768 pixels
Backlight Type	LED

Summary

General Information and Service Guidelines

General Servicing Guidelines

Guidelines for servicing, leakage current checks, and ESD prevention.

Important Safety Notices

Regulations, warnings, electrical shock, ESD, lead-free solder, and specified parts.

How to Read this Service Manual

Explanation of icons (Note, Caution, Warning, Reference) for understanding the manual.

Product Specifications

Detailed Specifications

Technical specifications including screen size, resolution, aspect ratio, and power requirements.

Location of Controls and Components

Board Location Overview

Visual identification of the main integration board's placement within the TV.

Main Board Function and Connectors

Explains the main board's function and details keypad/remote and speaker connectors.

LED Panel Identification

Identification and model number of the LED panel component.

LVDS Connector Pinout

Detailed pinout and function of the LVDS connector for the LED panel.

Disassembly and Assembly Procedures

Pedestal Removal

Step-by-step instructions for removing the TV pedestal.

Back Cover Removal

Instructions and visual guide for removing the TV's back cover.

Adhesive Tape Removal

Procedure for safely removing adhesive tape during disassembly.

Main Board Removal

Steps to disconnect couplers and remove the main board.

Speaker Removal

Instructions for taking out the speaker components.

Remote Control Board Removal

Procedure for removing the remote control board.

Installation and Connection Guides

External Equipment Connections

Guide to connecting accessories, antenna, and PC to the TV.

HDMI and DVI Connections

Instructions for connecting devices via HDMI and DVI interfaces.

Operation and Control

Front Panel Controls

Overview of the TV's front panel buttons and indicator LED.

Remote Control Functions

Detailed explanation and function of each button on the remote control.

Electrical Schematics and Diagrams

Block Diagram

High-level overview of the TV's internal electrical architecture and signal flow.

Circuit Diagrams

Detailed circuit schematics for power supply, DC-DC converters, and other components.

Wiring Connection Diagram

Visual guide illustrating internal wiring connections between components.

Measurements and Adjustments

Factory Model Entry and Adjustments

Procedure to access and use the factory service mode for adjustments.

Software Update Procedure

Step-by-step instructions for updating the TV's firmware via USB.

Hotel Model Configuration

Guide to accessing and configuring the hotel mode settings.

Troubleshooting Procedures

Simple Troubleshooting Checks

Basic checks for common picture and audio issues.

Main Board Failure Diagnostics

Diagnostic flowchart for troubleshooting main board related problems.

Panel Failure Identification

Identification and causes of various panel failure modes and symptoms.