Haier HL24XP1 Schematic

SERVICE MANUAL

LCD TV

Model No.

Service No.

Chassis

HL24XP1

HL24XP1A

MTK5380LC-A

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.

©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.

Haier Group

CONTENTS

Chapter 1: General Information

1-1. Document Information
1-2. General Guidelines
1-3. Important Notice

1-3-1. Follow the regulations and warnings ..................................................... 3

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

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

1-3-4. About lead free solder (PbF) .................................................................. 4

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1-3-6 Safety check after repairment .................................................................4

1-3-7. Ordering Spare Parts .............................................................................6

1-3-8. Photo used in this manual ..................................................................... 6

..................................................................................... 3

1-4. How to Read this Service Manual

1-4-1. Using icons: ........................................................................................... 6

........................................................................... 3

................................................................................ 3

...................................................... 6

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2-2 External pictures (four faces)

...................................................................................... 8

.............................................................. 9

Chapter 3. Disassemble and Assemble

3-1 Remove the Pedestal

3-2. Remove the Front Cover
3-3. Remove the LCD Panel
3-4. Remove the Main Board
3-5. Remove the Power Supply Board

3-6. Remove the Speaker

3-7. Remove the Keypad Assembly
3-8. Remove the Remote Control Board

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

.....................................................................11

.......................................................................11

......................................................................11

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

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

..........................................................12

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

Chapter 4. Location of Controls and Components

4-1. Board Location
4-2. Main Board

4-2-1 Function Description: ............................................................................ 14

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...................................................................................... 13

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

11

12

12

12

13

4-3. Power Supply Board

4-3-1. Function description:............................................................................ 16

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4-4. LCD Panel

.............................................................................................. 16

............................................................................ 16

Chapter 5. Installation Instructions

Chapter 6. Operation Instructions

6-1. Front Panel Controls
6-2. Back Panel Controls
6-3. Setting Up Your Remote Control

............................................................................ 23

............................................................................. 23

........................................................ 23

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

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

Chapter 7. Electrical Parts

7-1. Block Diagram
7-2. Circuit Diagram
7-3 .Wiring Connection Diagram

....................................................................................... 25

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

............................................................... 41

Chapter 8. Measurements and Adjustments

8-1. Service Mode

8-1-1.How to enter into Service Mode............................................................ 42

8-1-2.How to exit ............................................................................................ 42

8-2. Measurements and Adjustments

8-2-1. Version, S/N, Panel Resoution ............................................................ 42

8-2-2. Video .................................................................................................... 43

8-2-3. Audio .................................................................................................... 44

8-2-4. Channel ............................................................................................... 44

8-2-5. Gamma ................................................................................................ 56

8-2-6. Backlight ..............................................................................................56

8-2-7. Function ............................................................................................... 57

....................................................................................... 42

...................................................... 42

18

23

26

Chapter 9. Trouble shooting

9-1. Simple check
9-2. Power Supply Board Failure Check.
9-3. Mainboard Failure Check
9-4. Pannel Failure

......................................................................................... 49

.................................................................. 51

....................................................................................... 52

................................................ 50

Service Manual

Model No.: HL24XP1

Chapter 1: General Information

1-1. Document Information

Document format: Adobe PDF
Author: Zhou Peng
Compiler: Bao Qinghong

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

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

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such

3

Service Manual

Model No.: HL24XP1

components commonly are called Electrostatically Sensitive (ES) Devices. The following

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electros static discharge (ESD).

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"

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damage caused by static by static electricity.

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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.

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conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of
the assembly.

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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low noise (resistors), etc. are used.

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the parts list.

Safety Component

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1-3-6 Safety check after repairment

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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

4

Service Manual

Model No.: HL24XP1

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:

may result in an explosion hazard.

2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage

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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 non­abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength).

CAUTION:

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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

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A wrong part substitution or incorrect polarity installation of electrolytic capacitors

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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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CAUTION:

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.

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If you have not the 500V insulation resistance meter, use a Tester. External exposure metal:
Antenna terminal Headphone jack.

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5

Service Manual

Model No.: HL24XP1

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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5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient 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:

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 lifting of your foot

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

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 cover of each product. Software

version can be found in the Spare Parts List.

2. Spare part No. and description

Spare part No. and description can be found in the Spare Parts List.

1-3-8. Photo used in this manual

The illustration and photos used in this Service 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

1-4-1. Using icons:

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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.

6

Caution:

A “caution” is used when there is danger that the reader, through incorrect

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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

Service Manual

Model No.: HL24XP1

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7

Service Manual

Model No.: HL24XP1

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Model HL24XP1

Screen Size 23.6 inch

Aspect Ratio 16:9

Resolution 1920x1080

Response Time (ms)

Angel of View H:170/V:60

Color Display 16777216

No. of Preset Channels 181

OSD Language

Color System NTSC

Audio System M, BG, I, L, L'

Audio Output Power

(Built-in) (W)

Audio Output Power

(outer) (W)

Total Power Input (W) 60W

Voltage Range (V) AC100V~240V

3RZHU)UHTXHQF\+] 60Hz

Time of Sleep Timer

(MINS)

5 (GRAY TO

GRAY)

English/French/Spanish

3W×2

No

120Min

Net Weight (KG) 6.0

Gross Weight (KG) 7.0

Net Dimension (MM) 600x160x500

Packaged Dimension

(MM)

8

655x170x520

2-2 External pictures (four faces)

Service Manual

Model No.: HL24XP1

Front Side

Left Side

9

Service Manual

Model No.: HL24XP1

Right Side

10

Back Side

Chapter 3. Disassemble and Assemble

.

3-1 Remove the Pedestal

①

Service Manual

Model No.: HL24XP1

①

Remover the eight screw indicated with ○

②.

Turn to front cover upwards

③

Then remove the front cover from the unit

3-3. Remove the LCD Panel

①

②

① Lay down the unit so that rear cover
downward.

Remove the two screw from the

②
pedestal indicated with③ ○.

Then remove the pedestal .

3-2. Remove the Front Cover

①

②

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

3-4. Remove the Main Board

②

①

11

Service Manual

Model No.: HL24XP1

3-5. Remove the Power Supply Board

①Remover the four screw indicated with ○.
②Then remove the P ower Board.

3-6. Remove the Speaker

3-7. Remove the Keypad Assembly

①

Remover the two screw indicated with ○.

②Then remove the K eypad Assembly.

3-8. Remove the Remote Control Board

l

①Remover the four screw indicated with ○.
②Remover Sponge piece
③

Then remove the . Speaker

①Remover the one screw indicated with ○.
②Then remove the R emote Control Board .

12

Service Manual

Model No.: HL24XP1

Chapter 4. Location of Controls and Components

4-1. Board Location

No. Parts number Description

A BoardDC18E0E0200MMain Board

B Board BPower Supply Board

4-2. Main Board

13

Service Manual

Model No.: HL24XP1

4-2-1 Function Description:

Main Board

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Main board connector
Power connectors (CN1)

CN1

Pin number Signal name

1 +12V
2 +12V
3BL
4 DIM
5 GND
6 GND
7SW

Notes:

CN1-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.

System board will use this pin to control system power.
CN1-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,CN3)

CN2 CN3

Pin number

1
2
3
4
5

Speaker Connector (CN4)

Signal name Pin number
SB5V 1
IR 2
LED_R 3
LED_G
GND

Signal name
GND
AD1
AD2

Pin number Signal name

1L+
2L­3R­4R+

14

LVDS Connector (CN5)

Service Manual

Model No.: HL24XP1

Pin number

1 NC NC

2 NC NC

3 NC NC

4 NC NC

5 LVDS_D0E_N LVDS EVEN 0 - Signal

6 LVDS_D0E_P LVDS EVEN 0 + Signal

7 GND Ground

8 LVDS_D1E_N LVDS EVEN 1 - Signal

9 LVDS_D1E_P LVDS EVEN 1 + Signal

10 GND Ground

11 LVDS_D2E_N LVDS EVEN 2 - Signal

12 LVDS_D2E_P LVDS EVEN 2 + Signal

13 GND Ground

14 LVDS_CE_N LVDS EVEN Clock - Signal

15 LVDS_CE_P LVDS EVEN Clock + Signal

16 GND Ground

17 LVDS_D3E_N LVDS EVEN 3 - Signal

18 LVDS_D3E_P LVDS EVEN 3 + Signal

19 GND Ground

20 NC NC

21 NC NC

22 NC NC

23 GND Ground

24 GND Ground

25 GND Ground

26 Panel_power Power for panel

27 Panel_power Power for panel

28 Panel_power Power for panel

29 Panel_power Power for panel

30 Panel_power Power for panel

Signal name Description

15

Service Manual

˄

Model No.: HL24XP1

4-3. Power Supply Board

4-3-1. Function description:

To supply power for Mainboard, Panel.

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INPUT CONNECTOR (CNC1)

Power supply and Inverter Connector

CNC1˅

Pin

number Signal name Description

 1& 
 *1'
 *1'
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 %/212)) ,19(57(56ZLWFK&RQWURO
 9 9 Power
 9 9

Other Connector
AC120V~AC240V Input (CNC2)

Power supply for panel (CNC3)
Power supply for panel (CNC4)
Power supply for panel (CNC5)
Power supply for panel (CNC6)

4-4. LCD Panel

Ground
Ground

Power





16

Panle LVDS Connector (CNC3)

Service Manual

Model No.: HL24XP1

17