Haier ns l19w2q 10a schematic

Model No. NS-L19W2Q-10A

CHASSIS:

ZORAN775

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.

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CONTENTS

Table of contents………………..................………………….……….2

1. General Information

1.1 General Guidelines................................................................................4

1.2 Important notice…………………………………………………………..…4

1.3 How to read this Service Mauna…………………………………………..5

…………...............…………………………..4

2. SPECIFICATIONS………………………………………………….…...7

3. LOCATION OF CONTROLS AND COMPONENTS…..…..8

3.1Board Location……………………………….. ………….……………..…..8

3.2 A Board----Main Board………………………………...…………...……....8

3.3 B Board----Power Board……………………………..………….... ……..12

3.4 LCD Panel……………………………….. ………..………………………12

4. Disassemble and assemble…...………..…………………….....15

4.1 Remove the Pedestal…..……………………….….………………….….15

4.2 Remove the Front Cover….……………………………...……….………15

4.3 Remove the LCD panel……………………………………………………17

4.4 Remove the Main Board…………………………………………..………17

4.5 Remove the Power Board.………...…………………..………….………18

4.6 Remove the Speaker….…………………………...………….……….….18

4.7 Remove the Keypad Assembly…………………….…….…………....…19

4.8 Remove the Remote Control Board…………………………...…………19

5. INSTALLATION INSTRUCTIONS…………………………...….20

6. OPERATION INSTRUCTIONS……………………………….…..23

6.1 Front Panel Controls…………………………………………..................23

6.2 Back Panel Controls………………………………………….……….......24

6.3 Setting up Your Remote Control…………………………………..……..25

7. MEASUREMENTS AND ADJUSTMENTS…………………..26

8. Electrical parts……………………………...…………………………..31

8.1 Wiring Connection Diagram…………………..……………………..……31

8.2 Block Diagram…….………………………………..……….…………......32

8.3 Circuit Diagram……………………………….........................................32

9. Trouble Shooting Guide …………………………………………..49

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.

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,

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

Screen Size 18.5"

Display Type LCD

Panel 60 Hz vs.120 Hz 60Hz

Display Resolution 720P

Panel Resolution (Min.) 1366(H)x768(V)

Aspect Ratio 16:9

Contrast Ratio (Typ.) - panel 1000:1

Brightness (Center Typ.) cd/m2 300

Panel Native Color Temperature 6500

Uniformity (9-point Min.) 0.75(9point)

Response Time - Fact Tag 5ms

Panel Bit Depth (6 bit with FRC or 8 bit) 6bit

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

Zoom/Display Formats (Min.) Yes (3)

Comb Filter 3d y/c digital

3-2 Pull down Yes

USB Port for thumb drive (side) - Supports F/W Upgrade,

MP3, JPEG USB(for firmware update)

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 (2) (SIDE BACK)

PC Input - VGA (back) Yes (1) (SIDE BACK)

Shared Audio Inputs Yes(COMPOSITE & S-VIDEO)

RF Input (back) Yes (1) (SIDE BACK)

Audio Outputs (back) Yes (1) (SIDE BACK)

Watts/Channel (Min at 10% THD) 3W x 2

Sound Leveler Yes

Power Light On-blue; Off-red

Power: AC 240volt/60Hz Power: AC 120volt/60Hz

Energy Star 3.0 Yes

CA ROHS Yes

Simplay HD Yes

OSD Languages Eng/Fre/Spa

3. LOCATION OF CONTROLS AND COMPONENTS

3.1 Board Location

A Board

B Board

No. Description

A Board Main Board

B Board Power supply Board

C Speaker

3.2 A Board----Main Board

3.2. 1 Function Description: Main Board：

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 (CN7)

PIN 1

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 NC NC

20 NC NC

21 NC NC

22 NC NC

23 NC NC

24 NC NC

25,26 GND Ground

27 NC NC

28 NC NC

29 NC NC

30 NC NC

Power supply and Inverter Connector（CN3）

PIN 1

number Signal name Description

1 ON/OFF Preparative switch control 2 GND 3 GND

Ground Ground

4 ADJ INVERTER Lightness Adjust

5 BLON INVERTER Switch Control 6 +12V 12V Power 7 +12V 12V Power

Audio Output Connector（CN1）

PIN 1

number Signal name Description

1 LSPK Left Audio Output 2 GND 3 GND 4 RSPK Right Audio Output

Remote Board and Key board Connector（CN2）

Ground Ground

number Signal name Description

1 IR_IN IR 2 CPU5V 5V Power 3 LED_B Blue Indicator light 4 GND 5 LED_R Red Indicator light 6 K6 Key Connector POWER 7 K5 Key Connector MENU 8 K4 Key Connector P-