Haier HL24XK2 User manual
Order No.
LCD TV
Model No.
Chassis
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
©2010 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
SERVICE MANUAL
WARNING
TV1001S019V0
MTK5305
HL24XK2
Service No. HL24XK2a
CONTENTS
Chapter 1: General Information
1-1. Document Information........................................................................... 3
1-2. General Guidelines ................................................................................ 3
1-3. Important Notice ..................................................................................... 3
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
8VHWKHJHQHZLQJSDUWVVSHFL¿HGSDUWV .............................................. 4
1-3-6 Safety check after repairment................................................................. 4
1-3-7. Ordering Spare Parts............................................................................. 6
1-3-8. Photo used in this manual ..................................................................... 6
1-4. How to Read this Service Manual ...................................................... 6
1-4-1. Using icons: ........................................................................................... 6
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6SHFL¿FDWLRQOLVW ...................................................................................... 8
2-2 External pictures (four faces) .............................................................. 9
Chapter 3. Disassemble and Assemble
.............................................................................
11
...............11
......................................................................11
.............................................................................
12
..........................................................12
..................................................
12
Chapter 4. Location of Controls and Components
4-1. Board Location...................................................................................... 13
4-2. Main Board
..............................................................................................
13
4-2-1 Function Description:............................................................................ 14
&RQQHFWRUGH¿QLWLRQ.............................................................................. 14
3-1 Remove the Pedestal
3-2. Remove the Front Cover And Remove the LCD Panel
3-3. Remove the Main Board
3-4. Remove the Speaker
3-5. Remove the Keypad Assembly
3-6. Remove the Remote Control Board
4-3. TV Power Board ............................................................................ 16
4-3-1. Function description:............................................................................ 16
&RQQHFWRUGH¿QLWLRQ............................................................................ 16
4-4. LCD Panel.............................................................................................. 16
Chapter 5. Installation Instructions
Chapter 6. Operation Instructions
6-1. Front Panel Controls............................................................................ 23
6-2. Back Panel Controls
............................................................................. 23
6-3. Setting Up Your Remote Control
........................................................ 23
Chapter 7. Electrical Parts
7-1. Block Diagram....................................................................................... 25
7-3. Circuit Diagram ......................................................................................27
7-2 .Wiring Connection Diagram...............................................................
Chapter 8. Measurements and Adjustments
8-1. Service Mode ....................................................................................... 40
8-1-1.How to enter into Service Mode............................................................ 40
8-1-2.How to exit............................................................................................ 40
8-2. Measurements and Adjustments ...................................................... 40
8-2-1. Version, S/N, Panel Resoution ............................................................ 40
8-2-2. Video.................................................................................................... 41
8-2-3. Audio.................................................................................................... 42
8-2-4. Channel ............................................................................................... 42
8-2-5. Gamma ................................................................................................ 44
8-2-6. Backlight .............................................................................................. 44
8-2-7. Function ............................................................................................... 45
Chapter 9. Trouble shooting
9-1. Simple check ......................................................................................... 47
9-2. Power Supply Board Failure Check................................................. 48
9-3. Mainboard Failure Check .................................................................. 49
9-4. Pannel Failure ....................................................................................... 50
..........................................18
.......................................... 23
26
Service Manual
Model No.: HL24XK2
3
Chapter 1: General Information
1-1. Document Information
Document format: Adobe PDF
Author: Wanghaiyan
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
Service Manual
Model No.: HL24XK2
4
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
Service Manual
Model No.: HL24XK2
5
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
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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 non-
abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength).
CAUTION:7KLVLVDÀDPPDEOHPL[WXUH
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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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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: 'RQRWFRQQHFWWKHWHVW¿[WXUHJURXQGVWUDSWRDQ\KHDWVLQNLQWKLVUHFHLYHU
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.
Service Manual
Model No.: HL24XK2
6
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: 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 lifting of your foot
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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.
Service Manual
Model No.: HL24XK2
7
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
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Service Manual
Model No.: HL24XK2a
8
Model HL24XK2a
Screen Size 23.6 inch
Aspect Ratio 16:9
Resolution 1920x1080
Response Time (ms) 5 (GRAY TO
GRAY)
Angel of View H:170/V:60
Color Display 16777216
No. of Preset Channels 181
OSD Language English/French/Spanish
Color System NTSC
Audio System M, BG, I, L, L'
Audio Output Power
(Built-in) (W) 3W×2
Audio Output Power
(outer) (W) No
Total Power Input (W) 50W
Voltage Range (V) AC100V~240V
3RZHU)UHTXHQF\+] 60Hz
Time of Sleep Timer
(MINS) 120Min
Net Weight (KG) 5.3
Gross Weight (KG) 6.5
Net Dimension (MM) 585.6x190x434.4
Packaged Dimension
(MM) 600x195x450
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Service Manual
Model No.: HL24XK2
9
2-2 External pictures (four faces)
Front Side
Left Side
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