Haier DX-LDVD22-10A User manual

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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.
COLOR
TV
Model No.
DX-LDVD22-10A
CHASSIS: ZORAN775
2009 (Qingdao Electronics limited company)
All rights reserved. Unauthorized copying and distribution is a violation of
law.

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CONTENTS
Table of contents………………..................………………….……….2
1. General Information…………...............…………………………..4
1.1 General Guidelines................................................................................4
1.2 Important notice…………………………………………………………..…4
1.3 How to read this Service Mauna…………………………………………..5
2. SPECIFICATIONS………………………………………………….…...7
3. LOCATION OF CONTROLS AND COMPONENTS…..…..9
3.1Board Location……………………………….. ………….……………..…..9
3.2 A Board----Main Board……….………………………..…………...……....9
3.3 B Board------- (Power Board)………………………..………….... ……..14
3.4 LCD Panel……………………………….. ………..………………………14
4. Disassemble and assemble…...………..…………………….....17
4.1 Tearing down the base…..……………….…….…………..………….….17
4.2 Tearing down the plastic front cabinet…………………………..….……17
4.3 Tearing down the panel…………………………………………..........…17
4.4 Tearing down the panel joint pieces………………………………..……18
4.5 Tearing down the main board…………..………………………...………19
4.6 Tearing down the power supply….………….………………….…….….19
4.7 Tearing down the DVD….……………………….…………..………....…20
4.8 Tearing down the speaker……………………….....................…………20
4.9 Tearing down the DVD keypad assembly………………………….……21
4.10 Tearing down the rotated axis.……………………………………….…21
4.11 Tearing down the terminal board…………………………….....………22
4.12 Tearing down the keypad and remote control board…………………22

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5. INSTALLATION INSTRUCTIONS…………………………...….24
6. OPERATION INSTRUCTIONS……………………………….…..27
6.1 Front Panel Controls…………………………………………..................27
6.2 Back Panel Controls………………………………………….……….......28
6.3 Setting up Your Remote Control…………..……………………………..29
7. MEASUREMENTS AND ADJUSTMENTS…………………..30
8. Electrical parts……………………………...…………………………..35
8.1 Wiring Connection Diagram…………………..……………………..……35
8.2 Block Diagram…….………………………………..……….…………......36
8.3 Circuit Diagram……………………………….........................................36
9. Trouble Shooting Guide …………………………………………..54

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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.

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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
1.3.1 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,

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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.

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2. Specification
Screen Size 21.6"
Display Type LCD
Panel Technology TN
Panel 60 Hz vs.120 Hz 60Hz
Display Resolution 720p
Panel Resolution (Min.) 1366(H)x768(V)
Backlight Technology (CCFL or LED) CCFL
Aspect Ratio 16:9
Contrast Ratio (Typ.) - panel 800:1
Brightness (Center Typ.) cd/m2 350
Panel Native Color Temperature 6500
Uniformity (9-point Min.) 0.76(5POINT)
Response Time - Fact Tag 5ms
Panel Bit Depth (6 bit with FRC or 8 bit) 6 bit
Lamp Life (Typ. Hours) 50000
Horizontal Viewing Angle (At CR>10) 170
Vertical Viewing Angle (AT CR>10) 160
ATSC Tuner with Clear QAM Yes
NTSC Tuner (air & cable) Yes
Tuner Module Provider & part # NXP
Zoom/Display Formats (Min.) Yes (3)
Comb Filter 3d y/c digital
3-2 Pulldown Yes
USB Port for thumb drive (side) - Supports F/W
Upgrade, MP3, JPEG Yes(For firmware update, back side, with cover)
Closed Captioning Display Yes
V-Chip (Version 2.0) Yes
Sleep Timer Yes
Channel Labeling Yes
Auto Zoom Yes
Composite Inputs (back) Yes (1) (SIDE BACK)
S-Video Inputs (back) Yes (1) (SIDE BACK)
Component Video Inputs (back) Yes (1) (SIDE BACK)
HDMI Input - HDMI 1.3 (back) Yes (1) (SIDE BACK)
PC Input - VGA (back) Yes (SIDE BACK)
Shared Audio Inputs Yes (COMPOSITE & S-VIDEO)
RF Input (back) Yes (SIDE BACK)
Earphone Jack Location (side or back) side (1) (SIDE BACK)
Watts/Channel (Min at 10% THD) 3W x 2
Sound Leveler Yes
Audio-only (panel off) Yes
MTS/SAP Yes
Mono or Stereo Speaker Stereo
IR/RF IR

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Power Light On-Green; Off-red
Power: AC 120volt/60Hz Yes
DVD Player Yes
Optical Disk Playback Support
DVD Video/-R/-RW/+R/+RW/CD-R/-RW/JPEG
Photo
DVD video interface to TV Component - Progressive
PC Input Max, Resolution (match panel) 1360*768
OSD Style Simple-standardized
OSD Languages (Eng/Fre/Spa/Mand) Eng/Fre/Spa
Multi-Lingual Manuals (combined or divided) Combined

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3. LOCATION OF CONTROLS AND COMPONENTS
3.1. Board Location
No. Description
A Board Main Board
B Board Power supply Board
C DVD
D Speaker
3.2. A Board----Main Board
3.2. 1 Function Description:
Main Board：
A Board
D
B Board C DVD

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Process signal which incept from exterior equipment，then translate into signal that panel can display.
3.2.2 Connector definition
Main board connector
LVDS Connector (CN8)
PIN 1

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Power supply and Inverter Connector（CN3）
Pin number Signal name Description
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
PIN 1

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Pin
number Signal name Description
1 ON/OFF Preparative switch control
2 GND Ground
3 GND Ground
4 ADJ INVERTER Lightness Adjust
5 BLON INVERTER Switch Control
6 +12V 12V Power
7 +12V 12V Power
Audio Output Connector（CN1）
Pin
number Signal name Description
1 LSPK Left Audio Output
2 GND Ground
3 GND Ground
4 RSPK Right Audio Output
Remote Board and Key board Connector（CN2）
Pin
number Signal name Description
1 IR_IN IR
2 CPU5V 5V Power
3 LED_B Blue Indicator light
4 GND Ground
5 LED_R Red Indicator light
6 K6 KeyConnector POWER
7 K5 KeyConnector MENU
8 K4 Key Connector P-
9 K3 Key Connector P+
10 K2 Key Connector V-
PIN 1
PIN 1

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11 K1 Key Connector V+
12 K0 KeyConnector SOURCE
DVD Power Connector (CN5)
Pin
number Signal name Description
1 STB stand by
2 5V 5V Power
3 GND Ground
4 GND Ground
5 12V 12V Power
DVD Video Connector (CN6)
Pin
number Signal name Description
1 DVD_SW DVD 自动跳转
2 DVD_PB Pb Signal
3 DVD_Y Y Signal
4 GND Ground
5 DVD_PR Pr Signal
6 GND Ground
7 DVD_IR IR control
DVD Audio Connector (P1)
Pin
number Signal name Description
1 DVD_L_IN Left track
2 DVD_R_IN Right track
3 GND Ground
PIN 1
PIN 1
PIN 1

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3.3.B Board------- (Power Board)
Supply power for Main board and Panel
Power supply and Inverter Connector（CN10）
Pin
number Signal name Description
1 NC
2 GND Ground
3 GND Ground
4 BL-ADJUST INVERTER Lightness Adjust
5 BL-ON/OFF INVERTER Switch Control
6 +12V 12V Power
7 +12V 12V Power
Other Connector
AC150V~AC240V Input (CN15)
Power supply for panel (CN11)
Power supply for panel (CN12)
Power supply for panel (CN13)
Power supply for panel (CN14)
3.4. LCD PANEL.

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Connector definition

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4. Disassemble and assemble
4.1 Tearing down the base
4.2 Tearing down the plastic front cabinet
4.3.1 Tearing down the panel

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4.3.2 Tearing down the panel
4.4 Tearing down the panel joint pieces

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4.5 Tearing down the main board
4.6 Tearing down the power supply

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4.7 Tearing down the DVD
4.8 Tearing down the speaker