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FUNAI LF320EM4 A User Manual

FUNAI LF320EM4 A
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32” LCD TV
chassis FL14.10
© 2015 Funai Electric Co., Ltd.
All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated, transcribed,
downloaded or stored in any storage medium, in any form or for any purpose without the express prior written
consent of Funai. Furthermore, any unauthorized commercial distribution of this manual or any revision hereto
is strictly prohibited.
Information in this document is subject to change without notice. Funai reserves the right to change the content
herein without the obligation to notify any person or organization of such changes.
with the design is a registered trademark of Funai Electric Co., Ltd and may not be used in any way
without the express written consent of Funai. All other trademarks used herein remain the exclusive property of
their respective owners. Nothing contained in this manual should be construed as granting, by implication or
otherwise, any license or right to use any of the trademarks displayed herein. Misuse of any trademarks or any
other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights
to the fullest extent of the law.
SERVICE MANUAL
Contents
TYPE A
LF320EM4 A EMERSON (Serial No.: DS1, DS2)
32ME303V/F7 A MAGNAVOX (Serial No.: DS1)
TYPE B
LF320EM4 A EMERSON (Serial No.: ME2)
TYPE C
LF320EM4 A EMERSON (Serial No.: ME5)
TYPE D
LF320EM4 A EMERSON (Serial No.: ME1, ME6)
32ME303V/F7 A MAGNAVOX (Serial No.: ME1)
LF320EM5F EMERSON (Serial No.: ME1, ME2)
TYPE E
LF320EM4 A EMERSON (Serial No.: ME4)
TYPE F
LF320EM5F EMERSON (Serial No.: ME3)
32ME303V/F7 A MAGNAVOX (Serial No.: ME2)
LF320EM4 A EMERSON (Serial No.: ME7)
TYPE G
LF320EM4 A EMERSON (Serial No.: ME8, ME9)
32ME303V/F7 A MAGNAVOX (Serial No.: ME3)
This service manual contains information of different types of models.
Make sure to refer to the section describing your model.
150701

Table of Contents

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FUNAI LF320EM4 A Specifications

General IconGeneral
Screen Size32 inches
Display TypeLCD
HDMI Ports2
USB Ports1
Aspect Ratio16:9
VGA InputYes
Composite Input1
RF InputYes
Resolution1366 x 768

Summary

SERVICE MANUAL

IMPORTANT SAFETY NOTICE

Safety Precautions for LCD TV Circuit

Safety guidelines for servicing the LCD TV circuit, including checks and warnings.

Antenna Cold Check

Procedure to test antenna input for abnormal resistance.

Leakage Current Hot Check

Test for leakage current to ensure safety after reassembly.

Design Alteration Warning

Warning against unauthorized design changes that may affect safety.

Hot Chassis Warning

Precautions for servicing chassis with potential hot chassis conditions.

Product Safety Notice

Notice regarding safety-related parts and the need for specified replacements.

Precautions during Servicing

Detailed servicing precautions including parts, wiring, and insulation.

Safety Check after Servicing

Tests and checks to ensure safety compliance after servicing.

SPECIFICATIONS

TUNER / NTSC Specifications

Technical specifications for NTSC tuner system.

TUNER / ATSC Specifications

Technical specifications for ATSC tuner system.

LCD PANEL Specifications

Technical specifications related to the LCD panel.

VIDEO Specifications

Technical specifications for video input and output.

AUDIO Specifications

Technical specifications for audio output and distortion.

STANDARD NOTES FOR SERVICING

Circuit Board Indications

Understanding how IC pins and connector pins are indicated on circuit boards.

Pb (Lead) Free Solder

Guidance on using Pb-free solder for PCBs marked with the Pb-free symbol.

How to Remove / Install Flat Pack-IC

Step-by-step instructions for removing and installing flat pack ICs.

Instructions for Handling Semiconductors

Ground for Human Body

Importance of wearing a grounded band to remove static electricity from the body.

Ground for Workbench

Proper grounding of the workbench with a conductive sheet to prevent static discharge.

CABINET DISASSEMBLY INSTRUCTIONS

Disassembly Flowchart

Flowchart illustrating the cabinet disassembly steps in order.

Disassembly Method

Detailed method for disassembling specific parts and their identification.

LCD Panel Assembly Precautions

Crucial precautions for disassembling/re-assembling the LCD panel assembly.

TV Cable Wiring Diagram

ELECTRICAL ADJUSTMENT INSTRUCTIONS

Test Equipment Required

List of test equipment needed for electrical adjustments.

Service Mode Setup

Step-by-step guide to enter the TV's service mode.

Purity Check Mode

Procedure for checking display purity using different color screens.

VCOM Adjustment

Procedure for adjusting VCOM levels, with specific steps for different TV types.

HOW TO INITIALIZE THE LCD TV

FIRMWARE RENEWAL MODE

Equipment Required

List of equipment needed for firmware renewal.

Firmware Update Procedure

Steps for updating the TV's firmware using a USB storage device.

Factory Upgrade

Procedure for upgrading firmware and initializing settings to factory defaults.

TROUBLESHOOTING

Power Supply Section Troubleshooting

Troubleshooting guide for power supply issues.

Flow Chart No. 1 (Power On)

Troubleshooting flowchart for power not turning on.

Flow Chart No. 2 (Fuse Blows Out)

Troubleshooting flowchart for when the fuse blows out.

Flow Chart No. 3 (Voltage Fluctuations)

Troubleshooting flowchart for when the output voltage fluctuates.

Flow Chart No. 4 (Buzz Sound)

Troubleshooting flowchart for buzz sound near the power circuit.

Flow Chart No. 5 (P-ON+21V Output)

Troubleshooting flowchart for P-ON+21V output not being present.

Flow Chart No. 6 (AMP+13V Output)

Troubleshooting flowchart for AMP+13V output not being present.

Video Signal Section Troubleshooting

Troubleshooting guide for video signal issues.

Audio Signal Section Troubleshooting

Troubleshooting guide for audio signal issues.

BLOCK DIAGRAMS

System Control Block Diagram

System control block diagram illustrating the main components and their connections.

Video/Audio Block Diagram

Block diagram showing the video and audio signal processing paths.

Digital Signal Process Block Diagram

Block diagram detailing the digital signal processing functions.

LED Backlight Drive Block Diagram

Block diagram for the LED backlight driver circuit.

Power Supply Block Diagram

Block diagram illustrating the power supply circuit and its components.

SCHEMATIC DIAGRAMS / CBA AND TEST POINTS

Standard Notes

General notes and warnings regarding schematic diagrams and component replacement.

Caution, Notes, and Symbols

List of cautions, notes, and symbols used in schematic diagrams.

Test Point Information

Information on identifying and using test points on PCBs.

Digital Main Schematic Diagrams

Digital Main 1 Schematic Diagram [TYPE A, TYPE B]

Schematic diagram for the Digital Main CBA Unit, Type A/B.

Digital Main 1 Schematic Diagram [TYPE C]

Schematic diagram for Digital Main CBA Unit, Type C.

Digital Main 1 Schematic Diagram [TYPE D]

Schematic diagram for Digital Main CBA Unit, Type D.

Digital Main 1 Schematic Diagram [TYPE E]

Schematic diagram for Digital Main CBA Unit, Type E.

Digital Main 1 Schematic Diagram [TYPE F]

Schematic diagram for Digital Main CBA Unit, Type F.

Digital Main 1 Schematic Diagram [TYPE G]

Schematic diagram for Digital Main CBA Unit, Type G.

Function Schematic Diagram

CBA Unit Views

Digital Main CBA Top View [TYPE A, TYPE B]

Top view illustration of the Digital Main CBA Unit for Type A/B models.

Digital Main CBA Bottom View [TYPE A, TYPE B]

Bottom view illustration of the Digital Main CBA Unit for Type A/B models.

WIRING DIAGRAM

EXPLODED VIEWS

Packing

PARTS LIST [LF320EM4 A (Serial No.: DS1)]

Mechanical Parts

List of mechanical components and their part numbers.

LCD PANEL ASSEMBLY

Specific parts related to the LCD panel assembly.

PACKING

List of packing materials used for the product.

ACCESSORIES

List of accessories included with the product.

Electrical Parts

CAPACITORS

List of capacitors with their part numbers and specifications.

CONNECTORS

List of connectors with their part numbers.

DIODES

List of diodes with their part numbers and types.

ICS

List of integrated circuits with their part numbers.

COILS

List of coils with their part numbers.

TRANSISTORS

List of transistors with their part numbers.

RESISTORS

List of resistors with their part numbers and values.

MISCELLANEOUS

Miscellaneous electrical parts including beads and fuses.

REVISION HISTORY

Chassis FL14.10 Revisions

Revision history details for Chassis FL14.10.

COMPARISON LIST OF MODEL NAMES

Chassis FL14.10 Model Comparison

Comparison of model names and their associated types/serial numbers for Chassis FL14.10.

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