Haier zoran785 schematic

SERVICE MANUAL

LCD TV

Model No.

Service No.

Chassis

HL40XP1

HL40XP1a

ZORAN785

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.

©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.

Haier Group

CONTENTS

Chapter 1: General Information

1-1. Document Information
1-2. General Guidelines
1-3. 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

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1-3-6 Safety check after repairment .................................................................4

1-3-7. Ordering Spare Parts .............................................................................6

1-3-8. Photo used in this manual ..................................................................... 6

..................................................................................... 3

1-4. How to Read this Service Manual

1-4-1. Using icons: ........................................................................................... 6

........................................................................... 3

................................................................................ 3

...................................................... 6

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2-2 External pictures (four faces)

...................................................................................... 8

.............................................................. 9

Chapter 3. Disassemble and Assemble

3-1 Remove the Stand
3-2. Remove the Back Cover
3-3. Remove the Adhesive Tape
3-4 Remove the Terminal Bracket
3-5. Remove the Power Supply Module
3-6. Remove the Mainboard
3-7. Remove the Keypad Board
3-8. Remove the Speaker
3-9. Remove the Remote Control Board

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

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

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

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

................................................. 12

...................................................................... 12

................................................................ 12

........................................................................... 12

................................................. 12

Chapter 4. Location of Controls and Components

4-1. Board Location
4-2. Main Board & AV Board

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

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...................................................................................... 13

...................................................................... 13

4-3. Power Supply Board

4-3-1. Function description:............................................................................ 16

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4-4. LCD Panel

.............................................................................................. 16

............................................................................ 16

Chapter 5. Installation Instructions

5-1 External Equipment Connections

.......................................................19

Chapter 6. Operation Instructions

6-1. Front Panel Controls
6-2 Back Panel Controls
6-3 Setting Up Your Remote Control

............................................................................ 25

............................................................................. 26

........................................................ 27

Chapter 7. Electrical Parts

7-1. Block Diagram
7-2. Circuit Diagram
7-3 .Wiring Connection Diagram

....................................................................................... 20

..................................................................................... 29

............................................................... 46

Chapter 8. Measurements and Adjustments

8-1. Service Mode

8-1-1.How to enter into Service Mode............................................................ 47

8-1-2.How to exit ............................................................................................ 47

8-2. Measurements and Adjustments

8-2-1. Software Update ................... ............................................................ 47

8-2-2. Auto Color ............................................................................................48

8-2-3. White Balance/Color Temp ..................................................................49

8-2-4. Picture Mode .......................................................................................49

8-2-5. Audio Mode ......................................................................................... 50

8-2-6. SSPLL Setting .....................................................................................50

8-2-7. Aging Mode ......................................................................................... 51

8-2-8. Power On Mode

8-2-9. Camma Table ..................................................................................... 52

8-2-10. Reset to default

8-2-11. Reset all setting to default ................................................................. 53

....................................................................................... 47

...................................................... 47

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

..................................................................................52

Chapter 9. Trouble shooting

9-1. Simple check
9-2. Power Supply Board Failure Check.
9-3. Mainboard Failure Check
9-4. Pannel Failure

......................................................................................... 54

.................................................................. 56

....................................................................................... 57

................................................ 55

Service Manual

Model No.: HL40XP1

Chapter 1: General Information

1-1. Document Information

Document format: Adobe PDF
Author: Zhou Peng
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

3

Service Manual

Model No.: HL40XP1

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

4

Service Manual

Model No.: HL40XP1

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

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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 non­abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength).

CAUTION:

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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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A wrong part substitution or incorrect polarity installation of electrolytic capacitors

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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:

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.

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5

Service Manual

Model No.: HL40XP1

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:

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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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 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.

6

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

Service Manual

Model No.: HL40XP1

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7

Service Manual

Model No.: HL40XP1

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Model HL40XP1

Screen Size 40 inch

Aspect Ratio 16:9

Resolution 1920x1080

Response Time (ms)

Angel of View 176o

Color Display 16777216

No. of Preset Channels 181

OSD Language

Color System NTSC

Audio System M, BG, I, L, L'

Audio Output Power

(Built-in) (W)

Audio Output Power

(outer) (W)

Total Power Input (W) 210W

Voltage Range (V) AC100V~240V

3RZHU)UHTXHQF\+] 50~60Hz

Time of Sleep Timer

(MINS)

6.5 (GRAY TO

GRAY)

English/French/Spanish

10W×2

No

240Min

Net Weight (KG) 21.5

Gross Weight (KG) 26

Net Dimension (MM) 972x290x696

Packaged Dimension

(MM)

8

1058x330x780

2-2 External pictures (four faces)

Service Manual

Model No.: HL40XP1

Front Side

Left Side

9

Service Manual

Model No.: HL40XP1

Right Side

10

Back Side

Chapter 3. Disassemble and

3-1 Remove the Stand

1. Lay down the unit so that back cover faces

upward

Service Manual

Model No.: HL40XP1

2. Remove the six screws from the back
cover which are indicated with the circles in the
picture above.

3. Remove the stand

2. Then remove the back cover from the unit.

3-3. Remove the Adhesive Tape

The location of the adhesive tape is shown

below.

Remove the adhesive tape.

3-2. Remove the Back Cover

1. Remove the ten screws indicated (See
picture right.)

3-4 Remove the Terminal Bracket

Remove the four screws indicated by the

red circles in the picture. (See next page.)

11

Service Manual

Model No.: HL40XP1

Then put the terminal bracket to the side.

3-5. Remove the Power Supply

Disconnected the coupler CN1 CN2 CN3

CN4 CN5 CN7 J25.

Remove the Mainboard.

3-7. Remove the Keypad Board

Module

Remove the four screws indicated by the

red circles in below picture.

Then remove the power supply module.

3-6. Remove the Mainboard

Remove the eight screws indicated by the

rred circles in below picture.

3-8. Remove the Speaker

3-9. Remove the Remote Control

12

Service Manual

Model No.: HL40XP1

Chapter 4. Location of Controls and Components

4-1.

No. Parts number Description

A BoardMain Board

B BoardPower Board

4-2. Main Board & AV Board

13

Service Manual

Model No.: HL40XP1

4-2-1 Function Description:

Main Board

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Main board connector
Power connectors (CN3, CN5)

CNA2 CNE5

Pin number Signal name Pin number Signal name

1 SW 1 DIMMING
2 GND 2 ON/OFF
3 +5VSB 3 GND
4 GND 4 SELECT
5 GND
6 +12V
7 +12V

Notes:

CNE5-Pin 2: Backlight on/off:
The system can turn on or turn off the backlight of TFT LCD Panel through the power supply

unit path.

CNA2-Pin 1: System power on / standby
System board will use this pin to control system power.
CNE5-Pin 1: Control the luminance of backlight
The system can generate the PWN signal to control the strength of TFT LCD Panel’s

backlight through this connector

Keypad and remote connector (CNE1,CNE2)

CNE2 CNE3

Pin number

1
2
3
4
5

Signal name Pin number
SB5V 1
IR 2
LED_R 3
LED_G
GND

Signal name
GND
AD1
AD2

14

Speaker power connector (CNA3)

Pin number Signal name

1 24V
2 24V
3 GND
4 GND

Speaker Connector (CNC2)

Pin number Signal name

1L+
2L­3R­4R+

Service Manual

Model No.: HL40XP1

Other connectors:

CNB2 to Upgrade the program of ZORAN785 (U1) AND FLASH (U7)

15

Service Manual

Model No.: HL40XP1

4-3. Power Supply Board

4-3-1. Function description:

To supply power for Mainboard, Panel.

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INPUT CONNECTOR (CN2)

CN2 Signal name

1 24V
2 24V
3 SGND1
4 SGND1
5 5VSB
6 SGND1

4-4. LCD Panel

CN6 Signal name

7 ON/OFF
8NC

9 I-PWM
10 BL-ON/OFF
11 E-PWM

CN4 Signal name

1 +24V
2 +24V
3 GND
4 GND

16

4-4-1. Function Description: Display the signal.

Service Manual

Model No.: HL40XP1

17

Service Manual

Model No.: HL40XP1

18