Haier L39B2180a User manual

SERVICE MANUAL

LED TV

Model No. LE55B1381a

Chassis

MST 318

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

WARNING

1-1. Table of Contents

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

1-1. Table of Contents

1-3. Important Notice

4

Chapter 1: General Information

1

4

1-2. General Guidelines

1-4. How to Read this Service Manual

4

7

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

Service Manual

Model No.:

- 01 -

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

7

88

8

11

12

15

20

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

21

12snoitcennoCtnempiuqElanretxE1-5

42snoitcennoCIMDH2-5

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

27

6-1 Front Panel Controls

6-2 Back Panel Controls

6-3 Universal Remote Control

27

28

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

29

7-1. Block Diagram

7-2. Circuit Diagram

29

30

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

39

8-1 TV OSD Menu

8-2 Upgrade software

8-3 Factory menu

45

39

46

Service Manual

Model No.:

- 02 -

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

51

15kcehCelpmiS.1-9

9-2. Main Board Failure Check

9-3. Panel Failure

52

55

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.:

- 03 -

1-3-6 Safety Check after Repairment

- 04 -

Service Manual

Model No.:

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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".

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this

service manual might be equipped.

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CAUTION: 'RQRWFRQQHFWWKHWHVW¿[WXUHJURXQGVWUDSWRDQ\KHDWVLQNLQWKLVUHFeiver.

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).

CAUTION:7KLVLVDÀDPPDEOHPL[WXUH

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Capacitors may result in an explosion hazard.

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.

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

Service Manual

Model No.:

- 05 -

Electrostatically Sensitive (ES) Devices

1-3-7. Ordering Spare Parts

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.

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to damage ES devices.

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.

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

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

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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).

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.)

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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- 06 -

Service Manual

Model No.:

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.

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.:

- 07 -

Model

Screen Size 54.6inch

Aspect Ratio 16:9

Resolution 1920x1080

Response Time (ms)

6 (GRAYTO

GRAY)

Angel ofView 176

o

Color Display16777216

No. of Preset Channels 203

OSD LanguageEnglish/France/Spaish

Color System NTSC

Audio System M/N

Audio Output Power

(Built-in) (W)

10W×2

Audio Output Power

(outer) (W)

No

Total 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

ension (MM)

Packaged Dimension

(MM)

1400*160*890

LE55B1381a

1302*325*855

- 08 -

Service Manual

Model No.:

3. Location of Controls and Components

3-1 Board Location

No. Part Number Description

A Board

B Board

3-2 Main Board

Main board

Power board

0113070686

0113050420

J10:

HDMI

J4:IR&KEY

BOARD

J9:

LVDS

J6:PANEL

POWER

J5:POWER

IN

J1:

INVERTER

J2:

HDCP

J3:DVD

CTL

J8:AUDIO

POWER IN

J17:

S_VIDEO

J18:

YPBPR

J14:AUDIO

OUT

J19:AUDIO

IN

J12:

SPEAKER

$%RDUG

&%RDUG

%%RDUG

120HZ control board

C Board

0113060163

Service Manual

Model No.:

- 09 -

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

J1

J5

- 10 -

Service Manual

Model No.:

Keypad and remote connector (J4)

Pin number

1

2

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

3-3. Power Board

Service Manual

Model No.:

- 11 -

Speaker connector J12

Pin number Signal name Description

Audio Right+channel Output

R+

1

2

3

Audio Left+channel Output

L+

4

L-

R-

Audio Left- channel Output

Audio Right- channel Output

NO. Pin Connection Function

1 AC-N AC INPUT NUTURE

2 AC-L AC INPUT LINE

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

NO. Pin Connection Function

1 GND 24V DC RETURN

2 GND 24V DC RETURN

3 24V 24V DC OUTPUT

4 24V 24V DC OUTPUT

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

Pin-CON1 Connection And Function

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

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

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

3-4. LED Panel

- 12 -

Service Manual

Model No.:

V546H1-LE5

Service Manual

Model No.:

- 13 -

3-5 Interface Connec tions

-

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

Description



Ground

LVDS Data Format Selection 2

First pixel Odd LVDS Signal-

First pixel Odd LVDS Signal+

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

Format

No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

Symbol

GND

NC

SELLVDS

NC

GND

CH1[0]-

No

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

59

50

51

-

Symbol

-

Descrip tion

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

NC

DC power supply

NC

CH1[0]+

CH1[1]-

CH1[1]+

CH1[2]-

CH1[2]+

GND

CH1CLK-

CH1CLK+

CH1[3]-

CH1[3]+

GND

CH1[4]-

CH1[4]+

Ground

First pixel Odd LVDS Clock-

First pixel Odd LVDS Clock+

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 Signal-

First pixel Odd LVDS Signal+

First pixel Odd LVDS Signal-

First pixel Odd LVDS Sig

nal+

Ground

NC

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

CH2[0]-

CH2[0]+

CH2[1]-

CH2[1]+

CH2[2]-

CH2[2]+

GND

CH2CLK-

CH2CLK+

CH2[3]-

CH2[3]+

GND

CH2[4]-

CH2[4]+

Ground

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+

Second pixel Odd LVDS Signal-

Second pixel Odd LVDS Signal+

Second pixel Odd LV

DS Clock-

Second pixel Odd LVDS Clock+

1

NC

GND

NC

1

VCC

DC power supply

Service Manual

Model No.:

- 14 -

-

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

Description

Ground

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

No

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Symbol

GND

NC

CH3[0]-

No

22

23

24

25

26

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

Symbol

Descrip tion

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

NC

CH3[0]+

CH3[1]-

CH3[1]+

CH3[2]-

CH3[2]+

GND

CH3CLK-

CH3CLK+

GND

Ground

Third pixel Odd LVDS Clock-

Third pixel Odd LVDS Clock+

Ground

CH3[4]-

CH3[4]+

CH4[0]-

CH4[0]+

CH4[1]-

CH4[1]+

GND

CH4CLK-

CH4CLK+

CH4[3]-

CH4[3]+

GND

CH4[4]-

CH4[4]+

Ground

1

27

NC

GND

Ground

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

CH3[3]-

CH3[3]+

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

Third pixel Odd LVDS Signal-

Third pixel Odd LVDS Signal+

NC

1

NC

CH4[2]-

CH4[2]+

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+

Four pixel Odd LVDS Signal-

Four pixel Odd LVDS Signal+

Four pixel Odd LVDS Signal-

Four pixel Odd LV

DS Signal+

Four pixel Odd LVDS Clock-

Four pixel Odd LVDS Clock+

NC

1

NC

- 14 -

Service Manual

Model No.:

CN1(Header):CI0114M1HR0-LA(CviLux)

3LQ Ĉ 6 \P ERO )HDWXUH

1

2

3

4

5

VBL +24V

6

7

8

9

10

GND GND

11

Status

Normal (3.3V)

Abnormal(0V)

12

E_PWM

Extemal PWM

Control

13

14

BLON BL ON/OFF

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.

I_PWM

Ixtemal PWM

Control

3-6 120HZ Control Board

CON1 CON2

J2 J1 J3

CON 3 CON4

CON1 ISP debug interface

CON3 CON4

J1 INVERTER Input from mainboard J2 Power output to mainboard

J3 POWER Input

Pin NO.

Description

Pin NO.

Description

CON2

LVDS A and B team INPUT

LVDS C and D team OUTPUT

LVDS A and B team OUTPUT

4. Disassemble and assemble

Service Manual

Model No.:

- 15 -

Front

Back

4-1, Remove the10 screws as below picture

Service Manual

Model No.:

- 16 -

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



Service Manual

Model No.:

- 17 -

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

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



Service Manual

Model No.:

- 18-

-7, Remove the 4 screws fixing the power board. 

4-8,Remove the 2 screws as below picture

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