Hitachi LE43M4S9 Schematic

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Hitachi Service Manual

LE43M4S9 / LE48M4S9

43”/ 48” LED LCD TV

H i t a c h i A m e r i c a L i m i t e d 2 4 2 0 F e n t o n S t r e e t S u i t e 2 o o C h u l a V i s t a C A 9 1 9 1 4

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Hitachi ServiceManual LE43M4S9 / LE48M4S9

Table of Contents

Service Cautions and Warnings …………….………..…………	pg. 2	~ 3
Features / Specifications …………………………………………	pg. 4
Block Diagram ………….…………………………………………	pg. 5	~ 6
Network Connection ..….…………………………………………	pg. 7	~ 9
Part List …………………….………………………………………	pg. 10 ~ 11
Power / Main Board …………...…………………………………	pg. 12
Disassembly ………………...…………………………………….	pg. 13 ~ 15
Service Mode / Software Updates ………………………………	pg. 16
Troubleshooting …………...………………………………………	pg. 17 ~ 23
Schematics………………………………………………………….	pg. 24 ~ 29

© Copyright 2015 All rights reserved Hitachi America, Ltd. – Digital Media Division	1
2420 Fenton St., Suite 200 Chula Vista CA 91914

Hitachi ServiceManual LE43M4S9 / LE48M4S9

CAUTION: Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury,harmful radiation and materials, various measures are provided in this LCD TV. Be sure to read cautionary items described in the manual before servicing. These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that described in the operating instructions unless you are qualified to do so.

SERVICE WARNING

1.Replacement work should be started after the Panel Module and the AC/DC Power supply have become sufficiently cool.

2.Special care should be taken when working near the display area in order not to damage its surface.

3.The Panel Module should not be touched with bare hands in order to protect its surface from blemishes and damage.

4.It is recommended that you use clean soft gloves during the replacement work in order to protect not only the display area of the Panel Module but also yourself.

● Cleaning the TV’s LCD screen panel

Before cleaning the TV, turn it off and disconnect the power plug from the power outlet. To prevent scratching or damaging of the LCD screen face, do not knock or rub the surface with sharp or hard objects. Clean the screen with a soft cloth moistened with warm water and dry with a second soft cloth. If it is not enough, then use a cloth with mild detergent. Do not use harsh or abrasive cleaners.

● Cleaning the TV's cabinet

Use a soft cloth to clean the TV's cabinet and control panel. When excessively soiled, dilute a neutral detergent in water, wet and wring out the soft cloth in it, gently clean the cabinet, and then wipe it down with a dry soft cloth. Never use acid/alkaline detergents, alcoholic detergents, abrasive cleaners, powder soaps, OA cleaners, car wax, glass cleaners, and so on. They will cause discoloration, scratches or cracks.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the ncidence of component damage caused by static by static electricity.

1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test.

2.After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

Lead Free Solder (PbF)

This product is manufactured using lead-free solder as a part of a movement within the consumer products industry at large to be environmentally responsible. Lead-free solder must be used in the servicing and repairing of this product.

© Copyright 2015 All rights reserved Hitachi America, Ltd. – Digital Media Division	2
2420 Fenton St., Suite 200 Chula Vista CA 91914