Haier HL42R Service Manual

HL42R

TV-8888-126

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

CONTENT

1 .Warning ........................................................................................................................................................4

2. Specification................................................................................................................................................. 6

3. LOCATION OF CONTROLS AND COMPONENTS ................................................................................7

3.1.Board Location................................................................................................................................... 7

3.2. Main Board..................................................................................................................................... 7

3.2.1 Function Description ...............................................................................................................7

3.2.2 Connector definition................................................................................................................8

3.3 Power Board.................................................................................................................................. 10

3.3.1 Function Description: ......................................................................................................... 10

3.3.2 Connector definition.............................................................................................................. 11

3.4 LCD PANEL. ................................................................................................................................ 12

3.4.1 Function Description: ............................................................................................................ 12

3.4.2 Connector definition..............................................................................................................12

4. INSTALLATION INSTRUCTIONS..........................................................................................................13

4.1 External Equipment Connections.....................................................................................................13

4.2 HDMI CINNECTIONS.................................................................................................................... 19

5. OPERATION INSTRUCTIONS................................................................................................................22

5.1 Front panel controls.......................................................................................................................... 22

5.2 Back panel controls ..........................................................................................................................23

5.3 Setting Up Your Remote Control................................................................................................... 24

6. DISASSEMBLY INSTRUCTIONS........................................................................................................... 25

6.1 whole machine..................................................................................................................................26

6.2 Base subassembly............................................................................................................................. 27

6.3 Back cover subassembly ...............................................................................................................27

6.4 Screen bracket subassembly.......................................................................................................... 28

6.5 Front-frame subassembly ..............................................................................................................28

6.6 Wire subassembly---- Connection Sketch Interpretat.................................................................... 29

6.6.1. Wire Photo............................................................................................................................ 29

6.6.2 Components List....................................................................................................................29

7. MEASUREMENTS AND ADJUSTMENTS............................................................................................. 30

8. BLOCK DIAGRAM AND CIRCUIT DIAGRAM ....................................................................................33

8.1 BLOCK DIAGRAM ........................................................................................................................33

8.2 CIRCUIT DIAGRAM...................................................................................................................... 33

9. WIRING CONNECTION DIAGRAM ......................................................................................................49

10. TROUBLE SHOOTING GUIDE............................................................................................................. 50

10.1. Simple check .................................................................................................................................50

10.1.1 LCD is not bright.................................................................................................................50

10.1.2 No picture............................................................................................................................50

10.1.3 No sound................................................................................................................

10.2 PSU failure check........................................................................................................................51

10.3 Panel failure.................................................................................................................................52

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

1 .Warning

CAUTION: These servicing instructions are for use by qualified service personnel only. To reduce the

risk of electric shock, do not perform any servicing other than that contained in the operating instructions

unless you are qualified to do so.

IMPORTANT SAFETY INSTRUCTIONS

Read all of the instructions before using this appliance. When using this appliance, always

exercise basic safety precautions, including the following:

Read instructions

Read all of the safety and operating instructions before you use your TV.

Retain instructions

Retain safety and operating instructions for future reference.

Follow warnings and instructions

Follow all warnings on your TV and in the operating instructions. Follow all operating and use instructions.

Water and moisture

Do not use your TV near water. For example, do not use it near a bath tub, wash bowl, kitchen sink, laundry

tub, in a wet basement, or near a swimming pool.

Cleaning

Unplug your TV before cleaning. Do not use liquid or aerosol cleaners. Use only a damp cloth to clean the

exterior of your TV.

Ventilation

Slots and openings in the cabinet and the back or bottom are provided for ventilation, reliable operation, and

protection from overheating.These openings must not be blocked or covered.Do not block the openings by

placing your TV on a bed, sofa, rug, or other similar surface. Do not place your TV near or over a radiator or

heat register. Do not place your TV in a built-in installation, such as a bookcase or rack, unless you provide

correct ventilation or follow the manufacturer’s instructions.

Heat

Make sure that your TV is located away from heat sources such as radiators, heat registers,stoves, or other

products (including amplifiers) that produce heat.

Grounding or polarization

Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades

with one wider than the other. A grounding type plug has two blades and a grounding prong. The wide blade

or grounding prong are provided for your safety. If the plug does not fit, contact an electrician to replace the

obsolete outlet.

Power cord protection

Route power cords so that they are not likely to be walked on or pinched by items placed on or against them.

Pay particular attention to cords at plugs, convenience receptacles, and the point where they exit from your

TV.

Attachments

Use only attachments recommended by Insignia.

Stand

Do not place your TV on an unstable cart, stand, tripod,bracket, or table. Your TV may

fall,causing serious personal injury and serious damage to your TV. Use only with a cart,

stand, tripod, bracket, or table recommended by the manufacturer, or sold with your TV. If you mount your

TV to the wall,follow the manufacturer’s instructions and use a mounting accessory recommended by the

manufacturer. Your TV and cart combination should be moved with care. Quick stops,excessive force, and

uneven surfaces may cause your TV and cart combination to overturn.

Lightning

For added protection for your TV’s receiver during a lightning storm, or when it is left unattended and unused

for long periods of time, unplug it from the power outlet and disconnect the antenna or cable system. This

helps prevent damage to your TV from lightning and power line surges.

Servicing

Do not attempt to service your TV yourself because opening or removing covers may expose you to

angerous voltage or other hazards. Refer all servicing to qualified service personnel.

Replacement parts

When replacement parts are required, make sure that the service technician uses replacement parts

specified by the manufacturer that have the same characteristics as the original part. Unauthorized

substitutions may result in fire, electric shock, personal injury, or other hazards.

Overloading

Do not overload power outlets and extension cords because this can result in a risk of fire or electric shock.

Object and liquid entry

Never push objects of any kind into your TV through openings because objects may touch dangerous

voltage points or short out parts that could result in a fire or electric shock. Never spill liquid of any kind on

your TV.

Damage requiring service

Unplug this TV from the power outlet and refer servicing to qualified service personnel under the following

conditions:

• When the power supply cord or plug is damaged or frayed.

• If liquid has been spilled or objects have fallen into your TV.

• If your TV has been exposed to rain or water.

• If your TV does not operate normally by following the operating instructions. Adjust only those controls that

are covered by the operating instructions because incorrect adjustment of other controls may result in

damage and will often require extensive work by a qualified technician to restore your TV to its normal

operation.

• If your TV has been dropped or damaged in any way.

• When your TV exhibits a distinct change in performance.

Safety check

After completing any service or repair to this TV, ask the service technician to perform routine safety checks

to determine that your TV is in correct operating condition.

Power source

Operate your TV only from the type of power source indicated on the marking label. If you are not sure of the

type of power supplied to your home, consult your TV dealer or local power company.

Screen protection

Your TV’s screen is made of glass. Do not drop your TV or hit the glass screen. If the screen breaks, be

careful of broken glass. Reviewers: Please confirm.

Non-active pixels

The LCD panel contains almost 3 million thin film transistors, which provide exceptionally sharp video quality.

Occasionally, a few non-active pixels may appear on the screen as a fixed blue,green, or red point. These

non-active pixels do not adversely affect the performance of your TV, and are not considered defects.

2. Specification

Model

Screen size

Aspect ratio 16:9

Resolution 1920X1080

Response Time˄ms˅

Angel of view 178

Color display

NO.of preset channels

OSD language

Color system

Audio system

Audio output power(Built-in)(W)

Audio output power(outer)(W)

+/5

inch

8(GRAY TO GRAY)

16,770,000(256 steps of each R, G and B)

181

English

NTSC ATSC Clear QAM

DK,BG

10W×2

YES

Total power input˄W˅

Voltage range˄V˅

Power frequency˄Hz˅

240W

120V

60Hz

Time of sleep timer(MINS) 120Min

Net weight(KG)

Gross weight(KG)

Net dimension(MM)

1115X375X830

Packaged dimension(MM) 1115X375X830

3. LOCATION OF CONTROLS AND COMPONENTS

3.1.Board Location

No. Parts number Description

A Board Power Board

B Board Main Board

3.2. Main Board

3.2.1 Function Description

Main Board˖

Process signal which incept from exterior equipmentˈthen translate into signal that panel can display.

Signal flowing chart.

3.2.2 Connector definition

MTk5380

Power connector(CNA1)

Pin number Signal name Description

1 ON/OFF Control the power of system

2 GND Ground

3 5VSB Power of TV standby

4 GND Ground

5 GND Ground

6 12V Power of system

7 12V Power of system

IR connector (CNE1)

Pin number Signal name Description

1 5V Supply the Power of bright and IR receiver

2 IR Receive IR signal

3 RED Show red when TV standby 4 BLUE Show blue when TV working

5 GND Ground

6 NC NC

Key connector(CNE2)

Pin number Signal name Description

1 GND Ground

2 AD0 Control Power,CH+,CH-

3 AD1 Control Menu,V+,V-,INPUT

Backlight control connector(CN1)

Pin number Signal name Description

1 BKANJ Control the backlight of pannel

2 BKEN The system turn on or turn off the backlight of TFT LCD

Panel through the power supply unit path.

3 GND GND

4 5V Not use

LVDS Signal connector(CND1)

Pin number Signal name Pin number Signal name Pin number Signal name

1 LVDS VDD 9 Not use 17 A1P

2 LVDS VDD 10 Not use 18 A1N

3 LVDS VDD 11 Not use 19 A2P

4 LVDS VDD 12 Not use 20 A2N

5 Not use 13 A0P 21 GND

6 Not use 14 A0N 22 GND

7 GND 15 GND 23 CK1P

8 GND 16 LVDS_SEL 24 CK1N

Pin number Signal name

25 A3P

26 A3N

27 GND

28 GND

29 Not use

30 Not use

AMP connector(CNA2)

Pin number Signal name Description

1 18V Power of Audio power amp

2 18V Power of Audio power amp

3 GND Ground

4 GND Ground

Speaker connector(CNC1)

Pin number Signal name

1 L-

2 L+

3 R-

4 R+

3.3 Power Board

3.3.1 Function Description:

Supply power for Main board,Panel and DC/DC power board

3.3.2 Connector definition

CONNECTO

CN2 CN3 Signal name

1 24V

2 24V

3 24V

4 24V

5 24V

6 GND

7 GND

8 GND

9 GND

10 GND

CONNECTOR (CN4)

R (CN2 CN3)

CN4 Signal na

1 ON/OFF

2 GND

3 5VSB

4 GND

5 GND

6 12V

7 12V

3.4 LCD PANEL.

3.4.1 Function Description:

Display the signal.

3.4.2 Connector definition

Pin No Symbol Description Note

1 Power DC 12V

2 Power DC 12V

3 Power DC 12V

4 Power DC 12V

5 Power DC 12V

6 GND GND

7 GND GND

8 GND GND

9 GND GND

10 RO[0]N ODD LVDS SINGAL-

11 RO[0]P ODD LVDS SINGAL+

12 RO[1]N ODD LVDS SINGAL-

13 RO[1]P ODD LVDS SINGAL+

14 RO[2]N ODD LVDS SINGAL-

15 RO[2]P ODD LVDS SINGAL+

16 GND GND

17 ROCLK- ODD LVDS SINGAL-

18 ROCLK- ODD LVDS SINGAL+

19 GND GND

20 RO[3]N ODD LVDS SINGAL-

21 RO[3]P ODD LVDS SINGAL+

22 NC NC

23 NC NC

24 GND GND

25 RE[0]P EVEN LVDS SINGAL-

26 RE[0]N EVEN LVDS SINGAL+

27 RE[1]P EVEN LVDS SINGAL-

28 RE[1]N EVEN LVDS SINGAL+

29 RE[2]P EVEN LVDS SINGAL-

30 RE[2]N EVEN LVDS SINGAL+

CND1(Header):S14B-PH-SM4-TB(D)(LF)(JST) or equivalent.

Pin No. Symbol Description

11 NC NC

12 BLON BL ON/OFF

13 PWM Internal PWM Control

14 NC NC

VBL +24V Power input

GND Ground

4. INSTALLATION INSTRUCTIONS

4.1 External Equipment Connections

Accessories

Antenna Connection

Generally speaking, to enjoy a clearer picture, we recommend that you use a CATV system or an

outdoor antenna . location and antenna positioning.

External Equipment Connections

NOTE: All cables shown are not included with the TV.

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.

VCR connection

To avoid picture noise (interference), leave an adequate distance between the VCR and TV.

Connection Option 1

Set VCR output switch to channel 3 or 4 and then tune the TV to the same channel number.

AV OUT VIDEO IN

ANT IN

Connection Option 2

1. Connect the audio and video cables from the VCR's output jacks to the TV input jacks, as shown in the figure. When connecting the TV to VCR, match the jack colors (Video = yellow, Audio Left = white, and Audio Right = red). If you connect a S-VIDEO output from VCR to the S-VIDEO input, the picture quality is improved; compared to connecting a regular VCR to the Video input.

2. Insert a video tape into the VCR and press PLAY on the VCR. (Refer to the VCR owner`s manual.)

3. Select the input source with using the INPUT button on the remote control, and then press / button to select the source, press OK button to confirm.

VIDEO

L-AUDIO-R

L-AUDIO- R L-AUDIO- R

VIDEO

S-VIDEO

External Equipment Connections

External A/V Source Setup

How to connect

Connect the audio and video cables from the external equipment's output jacks to the TV input jacks, as shown in the figure. When connecting the TV to external equipment, match the jack colors (Video = yellow, Audio Left = white, and Audio Right = red).

How to use

1. Select the input source with using the INPUT button on the remote control.

2. Press / button to select the desired source.

3. Press OK button to confirm.

2. Operate the corresponding external equipment.

Connecting a DVD player

How to connect

1. Connect the DVD video outputs (COMPONENT) to the Y Pb Pr jacks on the TV and connect the DVD audio outputs to the YPbPr Audio IN jacks on the TV, as shown in the figure.

2. If your DVD only has an S-VIDEO output jack, connect this to the S-VIDEO input on the TV. as shown in the figure.

AV OUT VIDEO IN

VIDEO

L-AUDIO-R

L-AUDIO- R L-AUDIO- R

VIDEO

S-VIDEO

ANT IN

Camcorder

Video Game Set

COMPONENT IN

L-AUDIO- R

OPTICAL

OUT

AV OUT VIDEO IN

VIDEO

L-AUDIO R

ANT IN

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 INPUT button on the remote control to select Y Pb Pr mode.

3. Press Play button on external equipment for program play.

4. Refer to the DVD player's manual for operating instructions.

Component Input ports

To get better picture quality, connect a DVD player to the component input ports as shown below.

Component ports on the TV

Y Pb Pr

Video output ports on DVD player

Y B-Y R-Y Y Cb Cr

Y P P

1 1

PbPbPr

L-AUDIO- R

L-AUDIO- R L-AUDIO- R

VIDEO

S-VIDEO

External Equipment Connections

Connecting a DTV(digital TV)

This TV can receive Digital Over-the-air/Cable signals without an external digital set-top box. However, if you do receive Digital signals from a digital set-top box or other digital external device, refer to the figure as shown below. This TV supports HDCP (High-bandwidth Digital Contents Protection) protocol for Digital Contents (480p,720p,1080i).

How to connect

Use the TV`s COMPONENT , VGA or HDMI jack for video connections, depending on your set-top box connector. Then, make the corresponding audio connections.

How to use

1. Turn on the digital set-top box. (Refer to the owner`s manual for the digital set-top box.)

2. Use INPUT on the remote control to select COMPONENT , VGA or HDMI source.

Signal

480i

480p

720p

1080i

1080p

COMPONENT

Yes

HDMI

Yes

Connecting a digital audio output

Send the TV`s audio to external audio equipment (stereo system) via the Digital Audio Output (Optical) port.

How to connect

1. Connect one end of an optical cable to the TV Digital Audio(Optical) Output port.

2. Connect the other end of the optical cable to the digital audio (optical) input on the audio equipment. See the external audio equipment instruction manual for operation.

HDMI IN VGA IN

HDMI

VGA AUDIO

VGA

DVI

L- - R

AUDIO

COMPONENT IN

PbPbPr

L-AUDIO- R

Digital Set-top Box

OPTICAL

OUT

L-AUDIO- R

VIDEO OUT

VIDEO

OPTICAL

OUT

Note

When connecting with external audio equipments, such as amplifers or speakers, please turn the TV speakers off.

Caution: Do not look into the optical output port. Looking at the laser beam may damage your vision.

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