Haier L39B2180 Schematic

SERVICE MANUAL

LCD TV

Model No. L39B2180a

MST318

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.

©2011 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.

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..…....………………...........………….........

1

4
4
4
7

7

88

8

8

11

12

15

20
21

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42snoitcennoCIMDH2-5

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

27

27

27

28

29

29

30

39

39

45

46

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Service Manual

Model No.:

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

9-2. Main Board Failure Check

9-3. Panel Failure

51

15kcehCelpmiS.1-9

52

55

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Service Manual

Model No.:

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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- 03 -

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

- 04 -

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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- 05 -

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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- 06 -

Service Manual

Model No.:

Model

Screen Size 39inch

Aspect Ratio 16:9

Resolution 1920x1080

Response Time (ms)

Angel ofView 176

Color Display16777216

No. of Preset Channels 200

OSD LanguageEng/Fra/Span

Color System PAL

Audio System BG/DK/I

Audio Output Power

(Built-in) (W)

Audio Output Power

(outer) (W)

L39B2180

8 (GRAYTO

GRAY)

o

10W×2

No

Tot al Power Input (W) 150W

Voltage Range (V) AC100V-240V

Power Frequency (Hz) 50~60Hz

Net Weight (KG) 12.4

Gross Weig

Net Dimension (MM)

Packaged Dimension

(MM)

ht (KG) 15.6

941*250*655

1045*210*735

- 07 -

3. Location of Controls and Components

3-1 Board Location

Service Manual

Model No.:

No. Part Number Description

A Board

B Board

TB300713400M

0113050462

Main board

Power board

3-2 Main Board

J8:

IR&KEY

J5:

POWER IN

J6:

LVDS

J4˖PANEL

POWER

J7:

USB

J1:

HDCP

INVERTER

J2:

B

J3:AMP _POWER

J12:DVD

CONTROL&POWER

J16:

HDMI

J15: DVD

SIGNALIN

J14:

SVIDEO IN

- 08 -

J9˖

AUDIO IN

J17˖

PANEL GPIO

J13:

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 (J2, J5)

J2

Notes:

J2-Pin 4: Backlight on/off:
The system can turn on or turn off the backlight of TFT LED Panel through the power
supply unit path.
J5-Pin 9: System power on / standby
System board will use this pin to control system power.
J2-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

J5

- 09 -

Keypad and remote connector (J8)

Service Manual

Model No.:

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

+5V

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

- 10 -

Service Manual

Model No.:

Speaker connector J13

Pin number Signal name Description
1

2

3
4

R+
R-

L­L+

Audio Right+channel Output
Audio Right- channel Output

Audio Left- channel Output

Audio Left+channel Output

3-3. Power Board

Power supply connectors

AC INPUT
Location: CON1
Connector type: 3.96mm-3Pin
Pin assignments:

Pin No Symbol Description

1L

3N

Table.

AC INPUT LINE

AC INPUT NUTURE

DC Output:
Location: CON4
Connector type: PH-5A 5P/2.0mm or equivalent
Pin assignments:

Pin No Symbol Description

1

2

3

4

Table. (2.0mm-4pin)

ADJ

SW

GND

GND

Location: CON3
Connector type: XH-4A 4P/2.5mm or equivalent

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

NO.

1 +24V +24V OUTPUT

2 +24V +24V OUTPUT

3GND

4GND

Pin Connection Function

Brightness

Inverter On/off Control

Ground

Ground

Ground

Ground

Location: CON2
Connector type: JST-B13PH-K-S or equivalent
Pin assignments:

Pin No Symbol Description

1,2,9,10,11 GND

3,4,7,8 +5V +5V Output

5 STB SMPS On/off Control(ON=HIGH)

6 +5VSB Standby Output

12,13 +12V +12V Output

Table. (2.5mm -13Pin)

Ground

- 11 -

Service Manual

Model No.:

3-4. LED Panel

OPEN CELL LABEL

The barcode nameplate is pasted on each open cell as illustration for CMI internal control.

V390HJ1-P01

XXXXXXXXXXXXXX

V390HJ1-P01 Rev.

XXXXXXXXXXXXXX

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Service Manual

Model No.:

3-5 Interface Connec t ions

CNF1 Connector Pin Assignment: (FI-RE51S-HF(JAE) or equivalent)

Symbol

No

GND

1

2

NC

NC

3

NC

4

NC

5

NC

6

SELLVDS

7

NC

8

NC

9

NC

10

GND

11

CH1[0]-

12

CH1[0]+

13

CH1[1]-

14

CH1[1]+

15

CH1[2]-

16

CH1[2]+

17

GND

18

CH1CLK-

19

CH1CLK+

20

GND

21

CH1[3]-

22

CH1[3]+

23

CH1[4]-

24

CH1[4]+

25

NC

26

Description

Ground

1

1

1

1

1

LVDS Data Format Selection 2

1

1

1

Ground

First pixel Odd LVDSSignal-

First pixel Odd LVDSSignal+

First pixel Odd LVDSSignal-

First pixel Odd LVDSSignal+

First pixel Odd LVDSSignal-

First pixel Odd LVDSSignal+

Ground

First pixel Odd LVDS Clock-

First pixel Odd LVDS Clock+

Ground

First pixel Odd LVDSSignal-

First pixel Odd LVDSSignal+

First pixel Odd LVDSSignal-

First pixel Odd LVDSSignal+

1

No

Symbol

NC

27

CH2[0]-

28

29

CH2[0]+
CH2[1]-

30

31

CH2[1]+

CH2[2]-

32

CH2[2]+

33

GND

34

CH2CLK-

35

36

CH2CLK+

37

GND

38

CH2[3]-

39

CH2[3]+

CH2[4]-

40

41

CH2[4]+

42

NC
NC

43

GND

44

GND

45

GND

46

NC

47

48

59

50

51

-

-

VCC

VCC

VCC

VCC

Descrip tion

1

Second pixel Odd LVDSSignal-

Second pixel Odd LVDSSignal+

Second pixel Odd LVDSSignal-

Second pixel Odd LVDSSignal+

Second pixel Odd LVDSSignal-

Second pixel Odd LVDSSignal+

Ground

Second pixel Odd LVDS Clock-

Second pixel Odd LVDS Clock+

Ground

Second pixel Odd LVDSSignal-

Second pixel Odd LVDSSignal+

Second pixel Odd LVDSSignal-

Second pixel Odd LVDSSignal+

1

1

1

DC power supply

DC power supply

DC power supply

DC power supply

- 13 -

Service Manual

Model No.:

4. Disassemble and assemble

Front

Back

4-1, Remove the6 screws as below picture

- 15 -

4-2, Remove the 5 screws on the back cabinet

4-3, Remove the 2 screws on the back cabinet.

Service Manual

Model No.:

4-4, Remove the 14 screws as below picture

- 16 -

Service Manual

Model No.:

4-5, Remove the 11 screws on the fixing board

4-6,Remove the 4 screws of the speakers

4-7,Remove the 2 screws as below picture

4-8,Remove the 4 screws as below picture

- 17 -

Service Manual

Model No.:

-9, Remove the 2 screws as below picture

4-10,Remove the 4 screws as below picture

- 18-