Haier 75UF5550B Schematic

Haier

SERVICE

SERVICE MANUAL

MANUAL

L

E

D

L

E

D

L

L E

E D

D TV

TV

Model

Model No.

No.

No. 75UF5550

MSD3458

75UF5550

Chassis

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.

CONTENTS

Service Manual

Model

Model No.:

75UF5550

No.:

75UF5550

No.:

No.: 75UF5550

75UF5550

Chapter

Chapter 1.

1-1.

Document

1-1.

Document

1-1.

1-1. Document

Document Information

1-2.

General

1-2.

General

1-2.

1-2. General

General Guidelines...................................................................

1-3.

Important

1-3.

Important

1-3.

1-3. Important

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

1-3-5. Use the genewing parts (speci  ed parts) .............................................. 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

1-4.

How

1-4.

1-4. How

How to

Using icons .............................................................................................................. . 6

Chapter

Chapter 2.

2-1.

Speci

2-1.

Speci

2-1.

2-1. Speci

Speci 

2-2.

External

2-2.

External

2-2.

2-2. External

External pictures

1.

General

1.

General

1. General

General Information

Information

Information ............................................................

Guidelines...................................................................

Guidelines................................................................... ..

Notice.......................................................................

Notice....................................................................... ..

to

Read

to

Read

to Read

Read this

2.

2. Speci



cation



cation

 cation

cation list.......................................................................

this

this Service

Speci

Speci 

list.......................................................................

list....................................................................... ..

pictures

pictures (four

Information

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

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

Service

Service Manual



cation



cation

 cation

cation

(four

(four faces).................................................

Manual

Manual ...........................................

faces).................................................

faces)................................................. ...

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

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

..

3

..

3

.. 3

3

..

3

..

3

.. 3

3

..

3

..

3

.. 3

3

.

6

.

6

. 6

6

..

8

..

8

.. 8

8

...

9

...

9

... 9

9

Chapter

Chapter 3.

3-1.

75UF5550

3-1.

75UF5550

3-1.

3-1. 75UF5550

75UF5550 .................................................................................11

3-1-1. Remove the Stand.......................................................... ................ ..... .. 11

3-1-2. Remove the Back Cabinet ................................................. .................. .11

3-1-3. Remove the Mainboard....................................................... .................. 11

3-1-4. Remove the Power Supply Module ................................... ................... 11

3-1-5. Remove the Speaker........................................................... .................. 11

3-1-6. Remove the Remote Control Board .................................. ................... 12

3-1- 7 . Remove the Key Board....................................................... .................. 12

Chapter

Chapter 4.

4-1.

Board

4-1.

Board

4-1.

4-1. Board

Board Location

4-2.

Mainboard

4-2.

Mainboard

4-2.

4-2. Mainboard

Mainboard ...............................................................................

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

4-2-2. Connector de  nition ........................................... ................... ................14

4-3.

Power

4-3.

Power

4-3.

4-3. Power

Power Supply

3.

Disassemble

3.

Disassemble

3. Disassemble

Disassemble and

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

4.

Location

4.

Location

4. Location

Location of

Location

Location .......................................................................

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

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

Supply

Supply Module

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

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

Module

Module ............................................................

of

of Controls

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

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

and

and Assemble

Controls

Controls and

Assemble

and

and Components

Components

..

13

..

13

.. 13

13

..

14

..

14

.. 14

14

..

15

..

15

.. 15

15

4-3-1. Function Description ........................................................ ................... ..15

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No.: 75UF5550

75UF5550

4-3-2. Connector de  nition .................................................... .................. ....... . 15

4-4.

LCD

4-4.

LCD

4-4.

4-4. LCD

LCD Panel

Panel

Panel ...............................................................................

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

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

...

... 16

16

Chapter

Chapter 5.

5-1.

Accessories

5-1.

Accessories

5-1.

5-1. Accessories

Accessories ............................................................................

5-2.

External

5-2.

External

5-2.

5-2. External

External Equipment

Chapter

Chapter 6.

6-1.

Front

6-1.

Front

6-1.

6-1. Front

Front Panel

6-2.

Back

6-2.

Back

6-2.

6-2. Back

Back Panel

6-3.

Setting

6-3.

Setting

6-3.

6-3. Setting

Setting Up

Chapter

Chapter 7.

7-1.

Block

7-1.

Block

7-1.

7-1. Block

Block Diagram

7-2.

Circuit

7-2.

Circuit

7-2.

7-2. Circuit

Circuit Diagram.......................................................................

Chapter

Chapter 8.

8-1.

Service

8-1.

Service

8-1.

8-1. Service

Service Mode

8-1-1.How to enter into Service Mode............................................................ 31

8-1-2.How to exit ............................................................................................ 31

8-2.

Measurements

8-2.

Measurements

8-2.

8-2. Measurements

Measurements and

8-2-1. The Main Menu .................................................................................... 31

8-2-2. General Setting .............................................................................. .. .... 32

8-2-3. Picture ................................................................................. ........ ......... 32

8-2-4. Sound ............................................................... ................................ .... 33

8-2-5. Debug ................................................................................... ............. ... 33

8-3.

Software

8-3.

Software

8-3.

8-3. Software

Software Update

8-3-1. T.VST59 software update .................................................................... 34

5.

Installation

5.

Installation

5. Installation

Installation Instructions

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

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

Equipment

Equipment Connections.........................................

6.

Operation

6.

Operation

6. Operation

Operation Instructions

Panel

Panel Controls..............................................................

Panel

Panel Controls

7.

7. Electrical

Diagram

Diagram .

Diagram.......................................................................

Diagram....................................................................... ...30

8.

8. Measurements

Controls..............................................................

Controls.............................................................. ...

Controls

Controls ..............................................................

Up

Your

Up

Your

Up Your

Your Remote

Electrical

Electrical Parts

Measurements

Measurements and

Mode

Mode ..........................................................................

Update

Update .....................................................................

Remote

Remote Control

.

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

.

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

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

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

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

.......................................................................... ..31

and

Adjustments

and

Adjustments

and Adjustments

Adjustments ..........................................

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

..................................................................... .34

Instructions

Connections.........................................

Connections......................................... ...

Instructions

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

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

Control

Control .........................................

Parts

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

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

and

and Adjustments

Adjustments

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

.......................................... ..31

..

.. 18

...

... 19

...

... 20

...

... 21

....

.... 22

....

.... 23

...30

..31

.34

18

19

20

21

22

23

Chapter

Chapter 9.

9-1.

Simple

9-1.

Simple

9-1.

9-1. Simple

Simple check

9-2.

Mainboard

9-2.

Mainboard

9-2.

9-2. Mainboard

Mainboard IC

9-3.

Mainboard

9-3.

Mainboard

9-3.

9-3. Mainboard

Mainboard Failure

9-4.

Pannel

9-4.

Pannel

9-4.

9-4. Pannel

Pannel Failure.........................................................................

2

9.

Trouble

9.

Trouble

9. Trouble

Trouble shooting

check

check ..........................................................................

Failure.........................................................................

Failure......................................................................... .45

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

.......................................................................... .35

IC

Introduction.....................................................

IC

Introduction.....................................................

IC Introduction.....................................................

Introduction..................................................... .38

Failure

Failure Check.......................................................

shooting

Check.......................................................

Check....................................................... .39

.35

.38

.38 .39

.39

.39 .45

.45

Service Manual

Model

Model No.:

No.:

75UF5550

No.:

75UF5550

No.: 75UF5550

75UF5550

Chapter

Chapter 1.

1-1.

Document

1-1.

Document

1-1.

1-1. Document

Document Information

Document format: Adobe PDF Author: Gao Bingbing Compiler:

1-2.

General

1-2.

General

1-2.

1-2. General

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.

General

1.

General

1. General

General Information

Information

Guidelines

Information

1-3.

Important

1-3.

Important

1-3.

1-3. Important

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).

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

To prevent damage which might result in electric shock or  re, do not expose this TV set to rain or excessive moisture. This TV must not be exposed to dripping or splashing water, and objects  lled with liquid, such as vases, must not be placed on top of or above the TV.

Notice

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.

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

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

3

Service Manual

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Model No.:

No.:

75UF5550

No.:

75UF5550

No.: 75UF5550

75UF5550

components commonly are called Electrostatically Sensitive (ES) Devices. The following techniques should be used to help reduce the incidence of component damage caused by electros static discharge (ESD).

Electrostatically

Electrostatically Sensitive

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" components. The following techniques should be used to help reduce the ncidence of component damage caused by static by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped 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.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

Sensitive

Sensitive (ES)

(ES)

(ES) Devices

Devices

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.

1-3-5. Use the genewing parts (speci  ed parts)

Special parts which have purposes of  re retardant (resistors), high-quality sound (capacitors), low noise (resistors), etc. are used.

When replacing any of components, be sure to use only manufacture's speci  ed parts shown in the parts list.

Safety

Safety Component

● Components identi  ed by mark have special characteristics important for safety.

Component

1-3-6 Safety check after repairment

Con  rm that the screws, parts and wiring which were removed in order to service are put in the 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

General Servicing

Servicing

Servicing Precautions

Precautions

4

Service Manual

Model

Model No.:

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

measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe.

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).

A wrong part substitution or incorrect polarity installation of electrolytic capacitors

No.:

75UF5550

No.:

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No.: 75UF5550

75UF5550

CAUTION:

Unless speci  ed otherwise in this service manual, lubrication of contacts is not required. Capacitors may result in an explosion hazard.

5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this

service manual might be equipped.

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.

8. Use with this receiver only the test  xtures speci  ed in this service manual.

CAUTION:

CAUTION: Do not connect the test  xture ground strap to any heat sink in this receiver.

9. Remove the antenna terminal on TV and turn on the TV.

This is a  ammable mixture.

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.

11. 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.

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12. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

13. Use only an anti-static type solder removal device. Some solder removal devices not

classi  ed as "anti-static" can generate electrical charges suf  cient to damage ES devices.

14. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to

damage ES devices.

15. 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).

16. 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.

17. 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 from a carpeted  oor can generate static electricity suf  cient to damage an ES device.)

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

1-4.

How

1-4.

1-4. How

How to

Using icons

icon is described in the table below:

6

to

Read

to

Read

to Read

Read this

Icons are used to attract the attention of the reader to speci  c information. The meaning of each

Note: A “ note ” provides information that is not indispensable, but may nevertheless be

valuable to the reader, such as tips and tricks.

this

Service

this

Service

this Service

Service Manual

Manual

Caution:

Service Manual

Model

Model No.:

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  nd additional information on a speci  c topic.

No.:

75UF5550

No.:

75UF5550

No.: 75UF5550

75UF5550

7

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Chapter

Chapter 2.

2-1.

Speci

2-1.

Speci

2-1.

2-1. Speci

Speci 



 cation

Model

Model 75UF5550

Screen Size 75 "

Aspect Ratio 16:9

Resolution 3840 x 2160

Brightness (cd/m ² ) 300

Contrast 35 00:1

Response Time (ms) 6.5

Angel of View H:1 70 ° , V:1 70 °

Color Display 1.07G

OSD Language

Color System PAL/SECAM

2.

Speci

2.

Speci

2. Speci

Speci 

cation

cation list

list



cation



cation

 cation

cation

English , Arabic, farsi ,French

, Portuguese ,Russian .

Audio System BG/DK/L/I

Audio Output Power (Built-in) (W) 10 W × 2

Audio Output Power (outer) (W) No

Total Power Input (W) 350 W

Voltage Range (V) AC1 0 0V~240V

Power Frequency (Hz) 50~60Hz

Time of Sleep Timer (MINS) 240Min

Net Weight (KG) 30.3

Gross Weight (KG) 31.3

Net Dimension (MM) 1685x973x84mm

Packaged Dimension (MM) 1923x322x1210mm

,French, .

8

2-2.

External

2-2.

External

2-2.

2-2. External

External pictures

pictures

pictures (four

(four

(four faces)

faces)

Service Manual

Model

Model No.:

No.:

75UF5550

No.:

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No.: 75UF5550

75UF5550

Front

Front Side

Side

Up

Side

Up

Side

Up

Up Side

Side

9

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No.: 75UF5550

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Right

Right Side

Side

Back

Back Side

10

Side

Service Manual

Model

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No.: 75UF5550

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Chapter

Chapter 3.

3-1.

75UF5550

3-1.

75UF5550

3-1.

3-1. 75UF5550

75UF5550

3-1-1. Remove the Stand 3-1-3. Remove the Mainboard and 6M60 Board

1. Lay down the TV set .

2. Remove the four screws from the stand which in the picture above.

3. Remove the stand.

3.

Disassemble

3.

Disassemble

3. Disassemble

Disassemble and

and

and Assemble

Assemble

1. Remove the eight screws .

2. Remove the Mainbord and 6M60 Board.

3-1-4. Remove the Power Supply Module

3-1-2. Remove the Back Cabinet

1.Remove the thirteen screws .

2. Flip machine, panel side up.

3.Carefully raise the Front shell from bottom.

1. Remove the four screws.

2. Remove the Power Supply Module.

3-1-5. Remove the Speaker

Remove the Speaker indicated by red circle in below picture.

11

Service Manual

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Model No.:

3-1-6. Remove the Remote Control Board And the Key Board

No.:

75UF5550

No.:

75UF5550

No.: 75UF5550

75UF5550

Remove the Remote Control Board and the Key Board indicated by

red circle in below picture.

12

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Chapter

Chapter 4.

4-1.

Board

4-1.

Board

4-1.

4-1. Board

Board Location

A Power Board

4.

Location

4.

Location

4. Location

Location of

Location

of

Controls

of

Controls

of Controls

Controls and

and

and Components

Components

C 6M60 Board

B Main Board

D Panel

No.

No. Parts

A Board HKL-750203 Power board

B Board T.MS3458.U801 Main board

C Board PL.MS6M60.1 6M60 board

D Panel SAMSUNG LSC750FF01 LED Panel

Parts

Type

Parts

Parts Type

Type

Type Description

Description

13

Service Manual

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Model No.:

4-2.

4-2. Mainboard

No.:

75UF5550

No.:

75UF5550

No.: 75UF5550

75UF5550

Mainboard

4-2-1.

4-2-1. Function

4-2-2.

4-2-2. Connector

Function

Function Description

Process signal which incept from exterior equipment then translate into signal that panel can

display.

Connector

Connector de

Description

de



nition

de



nition

de 

 nition

nition

14

IR

&

Key

IR

&

Key

IR

IR &

& Key

Key Interface

number

Pin number

number Signal

1

2 RED 3 GRE 4 IR 5 GND 6 K0 7 K1 8 K2 9 K3 10 K4 11 K5 12 K6 13 K7 14 GND

Interface

CND1

Signal

Signal name

5V

name

Inverter

Inverter connector

number

Pin number

number Signal

1

2

3

4

5

6

Speaker

Speaker connector

number

Pin number

number Signal

1

2 ROUT-

3 LOUT-

4 LOUT+

connector

connector CND2

connector

connector CNA3

Signal

Signal name

12V

BLO

ADJ

GND

Signal

Signal name

ROUT+

CND2

name

CNA3

name

4-3.

Power

4-3.

Power

4-3.

4-3. Power

Power Supply

4-3-1.

4-3-1. Function

Function

Function Description

To

supply power for Mainboard, Panel.

Supply

Supply Module

Module

Description

Service Manual

Model

Model No.:

No.:

75UF5550

No.:

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No.: 75UF5550

75UF5550

4-3-2.

4-3-2. Connector

Connector

Connector de

Mainboard

Mainboard power

Pin number

C

O

N

1

C

C O

is

O

N

1

is

O N

N 1

1 is

is the

connector

connector CON3

number

number Signal

1 12V 2 12 V 3 GND 4 GND 5 5V 6 5V 7 GND 8 GND 9 STB 10 5VSB

the

Power

the

Power

the Power

Power cord

de



nition

de



nition

de 

 nition

nition

CON1

CON1 CON3

power

power supply

supply

CON3

Signal

Signal name

cord

cord connector

name

connector

connector .

.

CON3

LED

LED driver

number

Pin number

number Signal

1 + 2 -

Backlight

Backlight adjust

1 BL_ON 2 ADJ 3 GND

AMP

AMP power

1 GND 2 GND 3 VCC 4 VCC

CON

CON 5

CON

CON 6

CON4

CON2

driver

driver connector

power

power connector

connector

C

ON5/6

C

ON5/6

C

C ON5/6

ON5/6

Signal

Signal name

adjust

adjust connector

C

C ON2

connector

connector C

ON2

connector

6

5

C

C O

name

O

O N4

N4

15