Haier LC22KW1 Schematic

SERVICE MANUAL

Order No.: TV0906S013V1

Customer Model: LC22KW1

Service Model:HLC22KW1b

CHASSIS:

MTK5380LC

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 b electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product deal with in this service information by anyone else could result in serious injury or death.

2009 (Qingdao Electronics
All rights reserved. Unauthorized copying and di stribution is a violation of
law.

1

limited company

)

CONTENTS

Table of contents

1. General Information

1-1. General Guidelines...…………………………………………………..3

1-2. Important notice………………………………………………………...3

1-3. How to read this Service Manual……………………………………..4

………………..................…………………………….2

…………...............…………………………..3

2. Specifications……………………………………………....................6

3. Location of Controls and Components

3-1.Board Location…………………………………………………………..7

3-2. Main Board & AV Board………………………………………………..7

3-3. Power Board…………………………………………………………….9

3-4. LCD Panel………………………………………………………………10

...........................7

4. Disassemble and assemble…………………...........………….11

4-1 Remove the Pedestal ……………………………………………….…12

4-2 Remove the Back Cover…………………...…………………………..12

4-3 Remove the adhesive tape…….........…………………………………12

4-4 Remove the Terminal Bracket……………....…………………………12

4-5 Remove the power module……….......……………………………….13

4-6 Remove the Main board……………....……………………………….13

4-7 Remove the small power board……………………….………………13

4-8 Remove the speaker …....……………………………………………..13

4-9 Remove the remote control board …….....…………………………..13

5. Installation Instructions ………..................………………..…..14

5-1 External Equipment Connections …………………………..........…..14

5-2 HDMI Connections ..………………………….............................…...16

6. Operation Instructions …………………………........................19

6-1 Front Panel Controls …………………………………………….........19

6-2 Back Panel Controls ……………...……………………………..........19

6-3 Universal Remote Controller...........................................................19

7. Electrical parts ............................................................................21

7-1. Block diagram ...............................................................................21

7-2. Circuit Diagram..............................................................................21

7-3 .Wiring Connection Diagram...........................................................36

8. Measurements and Adjustments .......................................37

8-1. Service Mode ..................................................................................37

2

8-1-1.How to enter into Service Mode ......................................................37

8-1-2.How to exit ..................................................................................37

8-2. Measurements and Adjustments ..................................................37

9. Trouble shooting ......................................................................43

9-1. Simple check ...............................................................................43

9-2. Power Supply Board failure check ..............................................44

9-3. Main board failure check ..............................................................45

9-4. Pannel failure ...............................................................................47

3

1. General Information

1-1 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

1-2 Important notice

1-2-1. 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

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

To prevent damage which might result in electric shock or fire, do not expose this TV set to rain or

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

Filled with liquid, such as vases, must not be place on top of or above the TV

1-2-3. 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
tech-niquesshouldbeusedtohelpreducetheincidenceofcomponentdamagecausedbyelectro
Static discharge (ESD).

1-2-4. About lead free solder (PbF)

This product is manufactured using lead-free solder as a part of a movement within the consum-er

products industry at large to be environmentally responsible. Lead-free solder must be used in the

servicing and repair of this product.

1-2-5. Use the genewing parts (specified parts)

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

● Components identified by mark have special characteristics important for safety.

4

1-2-6. Take Care to Deal With The Cathode-Ray Tube

In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is se-cured

against implosion. However, when removing it or serving from backward, it is dangerous to give a

shock. Take enough care to deal with it.

1-2-7. Safety Check after Repairment

Confirm that the screws ,parts and wiring which were removed in order to service are put in the

original positions, or whether there are the portions 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.

Insuration Test

1. Unplug the plug from the AC outlet.

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

3. Insulation resistance between the cord plug terminals and the eternal exposure metal

should be more than M ohm by using the 500V insulation resistance meter

4. 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

1-2-8. Ordering Spare Parts

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

letter)

1. Model number and Version letter
The model number can be found on the back of each product and the Version letter can
be found at the end of the serial number.

2. Part No. and Description

You can find them in your service manual.

1-2-9. 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.

1-3. How to read this Service Manual

1-4-1. Using Icons

Icons are used to attract the attention of the reader to specific information. The meaning of 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,

5

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/she will
find additional information on a specific topic.

2. Specification

Model
Screen size
Aspect ratio

Resolution

Contrast Ratio

Angel of view

Color display

OSD language

Color system

Color Temperature

Audio output power(Built-in)(W)

Power Consmption(in Standby)

Total power input（W）

HLC22K1/HLC22KW1

21.6inch
16:9
1366×768
1000:1
H:170/V:160

16.7M
English
ATSC/NTSC
Cold/Standard/Warm
3W×2
1W
60W

Voltage range（V）

Power frequency（Hz）

Time of sleep timer(MINS)

Net weight(KG)

Gross weight(KG)

Net dimension(MM)

Packaged dimension(MM)

120V±10% V
60HZ
240Min
7

9.25
600/216/485
605/240/530

3. LOCATION OF CONTROLS AND COMPONENTS

6

3-1 Board Location

A Board

Board

B

C

No. Parts number Description

A Board

B Board 0094001224B Power Board

C

3-2 Main Board & AV Board

DC1490E0200M

DC1490E0200D

Main Board

DVD player

：

3-2-1 Function Description:

Main Board

Process signal which incept from exterior equipment
display.

3-2-2 Connector definition

Main board connector

Power connectors (CN3, CN5)

CN3 CN5

7

Pin number Signal name Pin number Signal name

1 +12V 1 +12V

2 +12V 2 GND

3 BL 3 GND

4 DIM 4 +5V

5 GND 5 STB

6 GND

7 SW

Notes:

CN3-Pin 3: Backlight on/off:
The system can turn on or turn off the backlight of TFT LCD Panel through the power supply unit
path.
CN3-Pin 7: System power on / standby
System board will use this pin to control system power.
CN3-Pin 4: Control the luminance of backlight
The system can generate the PWN signal to control the strength of TFT LCD Panel’s backlight
through this connector.

Keypad and remote connector (CN2)

Pin number Signal name Description

1 IR_IN IR

2 CPU5V 5V

3 LED_G LAMP GREEN

4 GND GND

5 LED_R LAMPRED

6 K7 POWER

7 K6 MENU

8 K5 P_

9 K4 P+

10 K3 V_

11 K2 V+

12 K1 SOURCE

Speaker connector (CN1)

Pin number Signal name Description

1 LSPK LSPK

2 GND GND

3 GND GND

4 RSPK RSPK

DVD VIDEO Connector: CN6

Pin number Signal name Description

8

1 GPIO GPIO

2 PB_IN PB1 IN

3 Y_IN Y1_IN

4 GND GND

5 PR_IN PR1 IN

6 GND GND

7 IR DVD IR

DVD AUDIO Connector: P1

Pin number Signal name Description

1 LI YPBPR1L_IN

2 RI YPBPR1R_IN

3 GND GND

Other connectors:

CN19 to Upgrade the program of MTK5380LC (U13) AND FLASH (U17)

J3

+3V3SB

U0RX
U0TX

1
2
3
4

4x1 W/HOUSING

DIP4/W/H/P2.0

3-3. Power Board

3-3-1 Function Description:

Supply power for Main board, Panel.

3-3-2Connectordefinition

111INPUT CONNECTOR (CN10)

CN10 Signal name

9

1 N

2 GND

3 GND

4 DIM

5 EN

6 +12V

7 +12V

3-4. LCD Panel

C M O（V 2 1 6 B 1- L 01)/CLAAWA01

3-4-1 Function Description:

3-4-2 Connector definition

Pin number Signal name Description

1-3 LVDSVDD Power for panel

4-6 GND Ground

7 A0N LVDS EVEN 0 - Signal

8 A0P LVDS EVEN 0 + Signal

9 A1N LVDS EVEN 1 - Signal

10 A1P LVDS EVEN 1 + Signal

11 A2N LVDS EVEN 2 - Signal

12 A2P LVDS EVEN 2 + Signal

13,14 GND Ground

15 CK1N LVDS EVEN Clock - Signal

16 CK1P LVDS EVEN Clock + Signal

17 A3N LVDS EVEN 3 - Signal

18 A3P LVDS EVEN 3 + Signal

19 A4N LVDS ODD 0 - Signal

20 A4P LVDS ODD 0 + Signal

21 A5N LVDS ODD 1 - Signal

Display the signal.

10

22 A5P LVDS ODD 1 + Signal

23 A6N LVDS ODD 2 - Signal

24 A6P LVDS ODD 2 + Signal

25,26 GND Ground

27 CK2N LVDS ODD Clock - Signal

28 CK2P LVDS ODD Clock + Signal

29 A7N LVDS ODD 3 - Signal

30 A7P LVDS ODD 3+ Signal

CN1 (Header):S14B-PH-SM4-TB (D)(LF)(JST) or equivalent.

Pin No. Symnbol Description

1

2

3

4

5

6

13

14

25

VBL

GND

+5.0V Power input

Ground

26

7-12

15

16

17

18

19-24

27

28

29

30

LVDS EVEN LVDS EVEN Signal

LVDS ODD

LVDS ODD Signal

4. Disassemble and assemble

11

4 1 Remove th e Pedesta l.

①

②

Remover the eight screw indicated with ○.

①

Turn to front cover upwards

② .

Then remove the front cover from the unit.

③

4.3Remove the LCD panel

①

① Lay down the unit so that rear cover
downward.
② Remove the two screw from the

pedestal indicated with

Then remove the pedestal .

③

○.

4 2Remove the Front Co ver.

①

②

①Remover the five screw indicated with ○.
②Remover the pin indicated with ○.
③Then remove the panel.

4.4Remove the Main Board

①

②

②

①Remover the two screw indicated with ○.
②Remover the four screw indicated with ○.
③Then remove the Main Board.

4RemovethePowerBoard.5

○.

VD

○.

.

①

Removerthefourscrewindicatedwith

②

ThenremovethePowerBoard.

.

4

RemovetheD

6 Keypad

AssemblyandDVD

○.

4RemovetheKeypad

.8

Assembly

①

Removerthetwoscrewindicatedwith

②

ThenremovetheKeypadAssembly

4RemovetheRemote

. 9

ControlBoard

.

Removerthefourscrewindicatedwith

①

Thenremovethe

②

ThenremovetheDVDKeypadAssembly

③ .

ThenremovetheDVD

④ .

ShieldShelf

.

○.

4RemovetheSpeaker. 7

Removerthefourscrewindicatedwith
Remover
Thenremovethe

Spongepiece

Speaker

.

○.

①

Removertheonescrewindicatedwith

②

ThenremovetheRemoteControlBoard

13

5. Installation Instructions

5-1 External Equipment Connections

Antenna Connection

Connect one end of a coaxial cable (not included) to the ANT IN jack on the back of your TV/DVD
combo, then connect the other end of the cable into the antenna or cable TV wall outlet.

To improve picture quality from an antenna in a poor signal area, install a signal amplifier.

If you need to split the antenna signal to connect two TVs, install a two-way splitter.

Choose Your Connection

There are several ways to connect your television, depending on the components you want to
connect
and the quality of the signal you want to achieve. The following are examples of some different

ways to connect your TV with different input sources. Choose the connection which is best for you.

14

VGA Setup

You can use your LCD-TV as a monitor for your personal computer using a VGA
cable (not supplied).

Connection and use steps:

1.Read the user guide supplied with
your computer and ensure that it has
a VGA connector;

2.Make sure that the power of the LCD

-TV and the PC are off;

3.Connect a D type 15-pin PC interface
cable ( not supplied ) to the PC video
interface connector on the PC. Then
connect the other end to the PC video
interface connector on the back of the
LCD-TV.Tighten the screws on the PC
connectors once they are firmly
connected;

4.Turn on the power of the LCD-TV first ,
and then turn on the power of the PC;

5.Press INPUT button to set the video input mode of the LCD-TV to PC;
Once the input for PC is selected and if you see no image press function
F8 on you pc.

6.Check the image on your TV. There may be noise associated with the resolution,
vertical pattern, contrast or brightness in PC mode. If noise is present, change
the PC mode to another resolution, change the refresh rate to another rate or
adjust the brightness and contrast on the menu until the picture is clear. If the
refresh rate of the PC graphic card can not be changed, change the PC graphic
card or consult the manufacturer of the PC graphic card.

Resolution

Mode

VGA

SVGA

XGA

Resolution

640x480

800x600

1024x768

Line frequency(KHz)

31.5

37.9

48.4

VGA IN

PC AUDIO IN

Frame frequency(Hz)

60

60

60

Note: All above listed are subject to VESA criteria.

Component Setup

How to connect

Connect the DVD video outputs (Y, PB, PR)
to the Component(Y, Pb, Pr) IN jacks on
the TV and connect the DVD audio outputs
to the AUDIO IN jacks on the TV, as shown
in the figure.
NOTE: If your DVD player does not have
component video output,use S-Video.

How to use

1. Turn on the DVD player, insert a DVD.

2. Use button on the remote

INPUT

control to select the proper input.

Pr Pb Y

COMPONENT IN

R-AUDIO-L

S-VIDEO IN

15