Haier LE55B1381a Schematic

SERVICE MANUAL

LED TV

Model No. LE55B1381a

MST 318

Chassis

WARNING

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.

Haier Group

Service Manual

Model No.:

Chapter 1: General Information

1-1. Table of Contents

1. General Information...........................................................................

1-1. Table of Contents

1-2. General Guidelines 1-3. Important Notice 1-4. How to Read this Service Manual

....................................................................................

3. Location of Controls and Components...........................................

3-1. Board Location

3-2. Main Board

3-3. Power Board

3-4. LCD Panel

4. Disassemble and Assemble..........................................................

5. Installation Instructions..…....………………...........………….........

4 4 4 7

20 21

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6. Operation Instructions....…....………………...........………….........

6-1 Front Panel Controls

6-2 Back Panel Controls

6-3 Universal Remote Control

7. Electrical Parts…....………………...........………….........................

7-1. Block Diagram

7-2. Circuit Diagram

8. TV OPERATION........………….........................................................

8-1 TV OSD Menu

8-2 Upgrade software

8-3 Factory menu

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Service Manual

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9. Trouble-shooting…………..............................................................

9-2. Main Board Failure Check

9-3. Panel Failure

15kcehCelpmiS.1-9

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Service Manual

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1-2. General Guidelines

When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

1) Leakage Current Cold Check

2) Leakage Current Hot Check

3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive

1-3. Important Notice

1-3-1. Follow the regulations and warnings

Most important thing is to list up the potential hazard or risk for the service personnel to open the units and disassemble the units. For example, we need to describe properly how to avoid the possibility to get electrical shock from the live power supply or charged electrical parts (even the power is off).

This symbol indicates that high voltage is present inside.It is dangerous to make any king of contact with any inside part of this product.

This symbol indicates that there are important operating and maintenance instructions in the literture accompanying the appliance.

1-3-2. Be careful to the electrical shock

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to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,

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1-3-3. Electro static discharge (ESD)

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. The following techniques should be used to help reduce the incidence of component damage caused by electros static discharge (ESD).

1-3-4. About 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.

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Special parts which have purposes of fire retardant (resistors), high-quality sound (capacitors), low noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacture's specified parts shown in the parts list.

Safety Component

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Service Manual

Model No.:

1-3-6 Safety Check after Repairment

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in the original positions, or whether there are the positions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power source before; a. Removing or reinstalling any component, circuit board module or any other receiver assembly. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection. c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.

CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe.

Do not test high voltage by "drawing an arc".

3. Do not spray chemicals on or near this receiver or any of its assemblies.

4. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99% strength).

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Capacitors may result in an explosion hazard.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

7. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead.

Always remove the test receiver ground lead last. Capacitors may result in an explosion hazard.

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9. Remove the antenna terminal on TV and turn on the TV.

10. Insulation resistance between the cord plug terminals and the eternal exposure metal should be more than Mohm by using the 500V insulation resistance meter.

11. If the insulation resistance is less than M ohm, the inspection repair should be required. If you have not the 500V insulation resistance meter, use a Tester. External exposure metal: Antenna terminal Headphone jack

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Service Manual

Model No.:

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 semiconductorequipped 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.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some solder removal devices not

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to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the

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an ES device.)

1-3-7. Ordering Spare Parts

Please include the following informations when you order parts. (Particularly the Version letter)

1. Model number, Serial number and Software Version The model number and Serial number can be found on the back of each product and the Software Version can be found at the Spare Parts List.

2. Spare Part No. and Description

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1-3-8. Photo used in this manual

The illustration and photos used in this Manual may not base on the final design of products, which may differ from your products in some way.

1-4. How to Read this Service Manual

Using Icons:

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each icon is described in the table below:

Note:

A “note” provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.

Service Manual

Model No.:

Caution:

A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage equipment, loose data, get an unexpected result or has to restart(part of) a procedure.

Warning:

A “warning” is used when there is danger of personal injury.

Reference:

A “reference” guides the reader to other places in this binder or in this manual, where he/

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Service Manual

Model No.:

Model

Screen Size 54.6inch

Aspect Ratio 16:9

Resolution 1920x1080

Response Time (ms)

Angel ofView 176

Color Display16777216

No. of Preset Channels 203

OSD LanguageEnglish/France/Spaish

Color System NTSC

Audio System M/N

Audio Output Power

(Built-in) (W)

Audio Output Power

(outer) (W)

LE55B1381a

6 (GRAYTO

GRAY)

10W×2

Tot al Power Input (W) 160W

Voltage Range (V) AC100V-240V

Power Frequency (Hz) 50~60Hz

Net Weight (KG) 29

Gross Weight (KG) 34.2

Net Dim

Packaged Dimension

(MM)

ension (MM)

1302*325*855

1400*160*890

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3. Location of Controls and Components

3-1 Board Location

Service Manual

Model No.:

%%RDUG

No. Part Number Description

A Board

B Board

C Board

0113070686

0113050420

0113060163

Main board

Power board

120HZ control board

3-2 Main Board

J10:

HDMI

J4:IR&KEY

BOARD

J9:

LVDS

J6:PANEL

POWER

J5:POWER

J1:

INVERTER

J2:

HDCP

J3:DVD

CTL

&%RDUG

$%RDUG

J8:AUDIO

POWER IN

J17:

S_VIDEO

J18:

YPBPR

J14:AUDIO

OUT

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J19:AUDIO

J12:

SPEAKER

Service Manual

Model No.:

3-2-1 Function Description:

Main Board

Process signal which incept from exterior equipment then translate into signalthatpanel can display.

Main board connector

Power connectors (J1, J5)

Notes:

J1-Pin 4: Backlight on/off: The system can turn on or turn off the backlight of TFT LED Panel throughthepower supply unit path. J5-Pin 9: System power on / standby System board will use this pin to control system power. J1-Pin 3: Control the luminance of backlight The system can generate the PWN signal to control the strength of TFT LED Panel’s backlight through this connector

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Keypad and remote connector (J4)

Service Manual

Model No.:

Pin number 1

3 4 5

6 7

8 9 10 11 12 13 14

Signal name GND K7 K6 K5 K4 K3 K2 K1 K0 GND IR LED_G LED_R GND

Description Ground Power key NC CH- key CH+ key

Vol- key Vol+ key

Meny key TV/AV key Ground IR Receive Green Indicator Red Indicator +5V DC Power Supply

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Service Manual

Model No.:

Speaker connector J12

Pin number Signal nam e Description 1

3 4

R+ R-

L-

L+

Audio Right+channel Output Audio Right- channel Output

Audio Left- channel Output

Audio Left+channel Output

3-3. Power Board

Pin-CON1 Connection And Function

NO. Pin Connection Function

1 AC-N AC INPUT NUTURE 2 AC-L AC INPUT LINE

Pin-CON2 Connection And Function TYPE:2.54MM*13PIN

NO. Pin Connection Function

1 12V 12V DC OUTPUT 2 12V 12V DC OUTPUT 3 GND 12V DC RETURN 4 GND 5V DC RETURN 5 GND 5V DC RETURN 65V 5VDCOUTPUT 75V 5VDCOUTPUT 85VSB 5VDCOUTPUT

9 PS-ON SMPS ON/OFF CONTROL(ON=HIGH) 10 5V 5V DC OUTPUT 11 5V 5V DC OUTPUT 12 GND 5V DC RETURN 13 GND 5V DC RETURN

Pin-CON3 Connection And Function TYPE:2.54MM*4PIN

NO. Pin Connection Function

1 GND 24V DC RETURN

2 GND 24V DC RETURN

3 24V 24V DC OUTPUT

4 24V 24V DC OUTPUT

Pin-CON4 Connection And Function TYPE:2.54MM*8PIN

NO. Pin Connection Function

1 GND 24V DC RETURN

2 GND 24V DC RETURN

3 GND 24V DC RETURN

4 GND 24V DC RETURN

5 24V 24V DC OUTPUT

6 24V 24V DC OUTPUT

7 24V 24V DC OUTPUT

8 24V 24V DC OUTPUT

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3-4. LED Panel

Service Manual

Model No.:

V546H1-LE5

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Service Manual

Model No.:

3-5 Interface Connec tions

CNF2 Connector Pin Assignment(187059-51221(P-two) or equivalent)

Symbol

GND

SELLVDS

GND

CH1[0]-

CH1[0]+

CH1[1]-

CH1[1]+

CH1[2]-

CH1[2]+

GND

CH1CLK-

CH1CLK+

GND

CH1[3]-

CH1[3]+

CH1[4]-

CH1[4]+

Description

Ground

LVDS Data Format Selection 2

Ground

First pixel Odd LVDS Signal-

First pixel Odd LVDS Signal+

First pixel Odd LVDS Signal-

First pixel Odd LVDS Signal+

First pixel Odd LVDS Signal-

First pixel Odd LVDS Signal+

Ground

First pixel Odd LVDS Clock-

First pixel Odd LVDS Clock+

Ground

First pixel Odd LVDS Signal-

First pixel Odd LVDS Signal+

First pixel Odd LVDS Signal-

First pixel Odd LVDS Sig

nal+

Symbol

CH2[0]-

CH2[0]+ CH2[1]-

CH2[1]+

CH2[2]-

CH2[2]+

GND

CH2CLK-

CH2CLK+

GND

CH2[3]-

CH2[3]+

CH2[4]-

CH2[4]+

NC NC

GND

VCC

Descrip tion

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

Ground

Second pixel Odd LV

Second pixel Odd LVDS Clock+

Ground

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

DC power supply

DS Clock-



N o t e :1)Reserved for internal use.Please leave it open

N o t e : 2)High=connect to +3.3V:JEIDA Format;Low=connect to GND or Open:VESA Format

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Service Manual

Model No.:

CNF3 Connector Pin Assignment(187059-51221(P-two) or equivalent)

Symbol

GND

CH3[0]-

CH3[0]+

CH3[1]-

CH3[1]+

CH3[2]-

CH3[2]+

GND

CH3CLK-

CH3CLK+

GND

CH3[3]-

CH3[3]+

Description

Ground

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Ground

Third pixel Odd LVDS Clock-

Third pixel Odd LVDS Clock+

Ground

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Symbol

CH3[4]-

CH3[4]+

CH4[0]-

CH4[0]+

CH4[1]-

CH4[1]+

CH4[2]-

CH4[2]+

CH4CLK-

CH4CLK+

CH4[4]-

CH4[4]+ NC

NC NC

GND

CH4[3]-

CH4[3]+

Descrip tion

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Four pixel Odd LVDS Signal-

Four pixel Odd LVDS Signal+

Four pixel Odd LVDS Signal-

Four pixel Odd LVDS Signal+

Four pixel Odd LVDS Signal-

Four pixel Odd LVDS Signal+

Ground

Four pixel Odd LVDS Clock-

Four pixel Odd LVDS Clock+

Ground

Four pixel Odd LVDS Signal-

Four pixel Odd LVDS Signal+

Four pixel Odd LVDS Signal-

Four pixel Odd LV

DS Signal+

N o t e :1)Reserved for internal use.Please leave it open

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CN1(Header):CI0114M1HR0-LA(CviLux)

3LQ Ĉ 6 \P ERO )HDWXUH

Service Manual

Model No.:

VBL +24V

GND GND

Status

E_PWM

I_PWM

BLON BL ON/OFF

Normal (3.3V)

Abnormal(0V) Extemal PWM

Control Ixtemal PWM

Control

Note(1)Pin12:Extemal PWM control (use pin 12):Pin 13 must open. Note(2)Pin13:Intemal PWM control (use pin 13):Pin12 must open. Note(3)Pin12 and Pin13 can’t open in the same period.

3-6 120HZ Control Board

CON1 CON2

CON 3 CON4

Pin NO.

CON1 ISP debug interface CON3 CON4

LVDS C and D team OUTPUT

J1 INVERTER Input from mainboard J2 Power output to mainboard J3 POWER Input

Description

Pin NO.

CON2

J2 J1 J3

Description

LVDS A and B team INPUT LVDS A and B team OUTPUT

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Service Manual

Model No.:

4. Disassemble and assemble

Front

Back

4-1, Remove the10 screws as below picture

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Service Manual

Model No.:

4-2, Remove the 21 screws on the back cabinet

4-3, Remove the 4 screwsof the fixing board on the back cabinet.



4-4, Remove the 2 screws as below picture

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Service Manual

Model No.:

4-5, Remove the 7 screws on the fixing board

4-6,Remove the 4 screws as below picture



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+ 42 hidden pages