BBK LD2006SI-2 Service manual

LD2006SI-2

service manual

LD1506SI-2 LD1506SI-3 LT1500S-2 LT1500S-3 LT2000S

LD1906SI LT1900S

Explanation to LD2006SI-2 derived machines

Model

Video

main

board

button

board

Remote

control

receiving

board

USB

board

Headph

one

board

DVD

button

board

Power

board

Inverter

Conne

cting

board

Display

screen

Remark

LD1506SI

-2

21903-5 41903-0 B1506-0 D1903-1 H1903-1 J1903-0

Adapter

AK083-3

INV203-

SVA150XG

04TB 15"

TFT

Based on LD2006SI-2,

change display screen

to 15" screen, change

power board to adapter

and make the relevant

changes in video main

board

LD1506SI

-3

21903-5 41903-0 B1506-0 D1903-1 H1903-1 J1903-0

Adapter

AK083-3

INV203-

BOEHT150

X02-100 15" TFT

Based on LD1506SI-2,

change MST718BE to

MST718BU PQFP,

change the

manufacturer of display

screen

LT1500S-

21903-5 41903-0 B1506-0 H1903-1

Adapter

AK083-3

INV203-

SVA150XG

04TB 15"

TFT

Based on LD1506SI-2,

cancel DVD and card

read function

LT1500S-

21903-5 41903-0 B1506-0 H1903-1

Adapter

AK083-3

INV203-

BOEHT150

X02-100 15" TFT

Based on LD1506SI-3,

cancel DVD and card

read function

LD1906SI 21903-6 41903-0 B1903-1 D1903-1 H1903-1 J1903-0

Adapter

AK083-3

INV403

M190A1-

L02 19"

TFT

Based on LD1506SI-2, change display screen

and the matching circuit

LT1900S 21903-6 41903-0 B1903-1 H1903-1

Adapter

AK083-3

INV403

M190A1-

L02 19"

TFT

Based on LD1906SI,

cancel DVD and card

read function

LT2000S 21903-5 41903-0 B1903-1 H1903-1

@52006

-2UL

INV607

G2006

SI-0

LC201V02-

SDB1 20"

TFT

Based on LD2006SI

2, cancel DVD and card

read function

LD2006SI

-2

21903-5 41903-0 B1903-1 D1903-1 H1903-1 J1903-0

@52006

-2UL

INV607

G2006

SI-0

LC201V02-

SDB1 20"

TFT

Adopt MST718BE+20"

TFT screen

LD2006SI-2 is a LCD TV with multiple functions. It adopts MST718 as main chip (MST718 has built-

in MCU and video processor). Video main board of this machine adopts 21903-X series PCB (only small

changes are made in PCB board numbers and service manual of LD2006SI-2 adopts the video main

board of 21903-5). This PCB integrates the circuit of DVD function and DVB function on video main

board. This PCB is widely used and there are many derived machines. Now we will introduce functions

and machine structure of several derived machines one by one. We list the following for readers to used

in order to know differences between each model.

List of Differences in Different Models

1. Introduction to LT2000S model

Based on LD2006SI-2, LT2000S cancels DVD/card read function, but other circuit and components

are totally the same with those of LD2006SI-2. Compared with LD2006SI-2 on the aspect of composition

of the player, LT2000S has no PCB components of USB board /DVD button board/video main board

(DVD function circuit is absent). As for working principle, we will not give any introduction, so please

refer to “LD2006SI-2 Service Manual”.

2. Introduction to LD1506SI-2 model

LD1506SI-2 is a 15” LCD TV, which changes display screen to 15” LCD TFT screen on the basis of

LD2006SI-2. According to parameters requirements, drive means and inverter components are

changed. Differences on video main board: 1) LD1506SI-2 adopts LVDS output means, while LD2006SI-

2 adopts TTL output means, so the peripheral circuit of LCD drive output part on MST718 has slight

difference; 2) 15” screen adopts 5V power supply, so IC702 is added to act as voltage stabilizing IC; 20”

screen adopts 12V power supply, so there is no need to add voltage stabilizing IC; 3) LD1506SI-2 adds

VGA input circuit according to design requirements to make the machine use as display; 4) LD1506SI-2

adopts adapter (AK083-3) to supply power, while LD2006SI adopts internal power board to supply

power, so power input end is added on video main board. Remark: as for inverter components and

power adapter working principle of this machine, you may refer to “LD1506SI Service Manual”; as for

video main board and other subsidiary board working principle, please refer to “LD2006SI-2 Service

Manual”.

3. Introduction to LD1506SI-3 model

LD1506SI-3 changes display screen and MST718 ob the basis of LD1506SI-2. The main

differences are: display screen is changed to BOEHT150X02-100 15” TFT screen; main IC MST718BE

is changed to MST718BU PQFP; other parts are totally the same. Please refer to “LD2006SI-2 Service

Manual” and “LD1506SI Service Manual” for details of working principle.

4. Introduction to LT1500S-2 model

LT1500S-2 cancels DVD function on the basis of LD1506SI-2 but other parts are totally the same.

Please refer to “LD2006SI-2 Service Manual” and “LD1506SI Service Manual”.

5. Introduction to LT1500S-3 model

LT1500S-3 changes display screen and MST718 on the basis of LT1500S-2. The main differences

are: display screen is changed to BOEHT150X02-100 15” TFT screen; main IC MST718BE is changed to

MST718BU PQFP; other parts are totally the same. Please refer to “LD2006SI-2 Service Manual” and

“LD1506SI Service Manual” for details of working principle.

6. Introduction to LD1906SI

LD1906SI changes display screen to 19” TFT screen on the basis of LD1506SI-2. Because of this,

boost components has alteration, that is, boost components are changed to INV403 (working principle is

the same with INV607 and you may refer to “LT2002S Service Manual). Display screen drive adopts

LVDS input method and other circuits' working principle is totally the same with that of LD2006SI-2.

During the course of servicing, please refer to “LD2006SI-2 Service Manual”.

7. Introduction to LT1900S model

LT1900S cancels DVD function on the basis of LD1906SI and other parts are totally the same with

those of LD1906SI. Please refer to “LD2006SI-2 Service Manual” for details of working principle.

Catalog

Chapter One About Maintenance

1.1 Safety precautions

1.1.1 Power supply

1.1.2 Precautions for antistatic

1.1.3 Precautions for display screen

1.1.4 Precautions for laser head

1.1.5 About placement position

1.2 Maintenance method

1.2.1 Electric resistance method

1.2.2 Voltage method

1.2.3 Current method

1.2.4 Element substitution method

1.2.5 Cutting method

1.2.6 Visualized method

1.2.7 Comparison method

1.3 Required device for maintenance

Chapter Two Functions and Operation Instructions

Section One TV SEGMENT

2.1.1 Features

2.1.2 Set list

2.1.3 CONTROLS AND FUNCTIONS

2.1.4 CONNECTION AND STARTING

2.1.5 TV MODE

Section Two DVD SEGMENT

2.2.1 Controls and functions

2.2.2 FUNCTION SETTINGS

2.2.3 OTHERS

Chapter Three Principle and Servicing

The previous manual: TV part

Section One Principle of the player

3.1.1 Function

3.1.2 Block diagram of the player

3.1.3 Function introduction to IC of the player

Section Two Unit Circuit Principle

3.2.1 System control circuit

3.2.2 Audio circuit

3.2.3 Video circuit

3.2.4 Input circuit

3.2.5 Power circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four

Waveform diagram

Section Five Function Introduction to IC

3.5.1 function introduction to SDRAM

3.5.2 function introduction to STV8216

3.5.3 function introduction to MST718

3.5.4 function introduction to Cd4052

3.5.5 function introduction to TDA7266D

3.5.6 function introduction to FSAV433

3.5.7 function introduction to HEF4094B

Section Three Servicing and Principle

The next manual: DVD part

Section One Principle of the player

3.1.1 Introduction to the player

3.1.2 Introduction to IC used by the player

Section Two Unit Circuit Principle

3.2.1 Introduction to laser head

3.2.2 Servo circuit

3.2.3 Laser power control circuit

3.2.4 CD/DVD conversion circuit

3.2.5 Disc slot-in circuit

3.2.6 Disc in/out circuit

3.2.7 Main axis control circuit

3.2.8 Decode circuit

3.2.9 Reset circuit

3.2.10 Video circuit

3.2.11 Audio circuit

3.2.12 USB/CARD circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four

Section Five Function Introduction to IC

3.5.1 function introduction to MT1389HD

3.5.2 function introduction to FLASH

3.5.3 function introduction to D5954

Waveform diagram

101

106

122

3.5.4 function introduction to 4558/4580

3.5.5 function introduction to 24CC02A

Chapter Four Disassembly and Assembly Process

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two Circuit diagram

Chapter six BOM List

123

124

125

128

134

152

Chapter One About Maintenance

1.1 Safety precautions

1.1.1 Power supply

When maintenance personnel are repairing DVD TV, he should pay special attention to the power

with 220V 800V AC and 330V DC which will cause hurt and damage to persons!

1.1.2 Precautions for antistatic

Movement and friction will both bring static electricity which causes serious damages to integrated

IC. Though static charge is little, when a limited quantity of electric charge is added to large

scaleintegrated IC, as the capacitance is very small in the meantime, now the integrated IC is very much

easy to be struck through by static electricity or the performance will decrease. Thus static electricity

prevention is of extraordinary importance. The following are several measures to prevent static

electricity:

1. Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth,

and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity

device. The length and depth of the metal embedded under the earth should be determined according to

the wettability of the local soil. For humid places, it may be shorter, and longer and deeper for dry places.

If possible, it can be distributed and layed in terms of “#” shape.

2. On operating table-board, the antistatic table cushion should be covered and grounded.

3. All devices and equipments should be placed on the antistatic table cushion and grounded.

4. Maintenance personnel should wear antistatic wrist ring which should be grounded.

5. Places around the operating position should also be covered with electric conduction cushion or

Painted with antistatic paint.

1.1.3 Precautions for display screen

1. Display screen is breakable article, so please protect carefully when carrying and prevent fingers

or hard objects striking the screen to damage structure of the screen.

2. When cleaning screen, do not use organic chemicals. You should use cloth and use small

amount of special cleaning liquid in places difficult to clean.

- 1 -

1.1.4 Precautions for laser head

1. Do not stare at laser head directly, for laser emission will occur when laser head is working,

which will Hurt your eyes!

2. Do not use wiping water or alcohol to clean laser head, and you may use cotton swab.

1.1.5 About placement position

1. Never place TV in positions with high temperature and humidity.

2. Avoid placing near high magnetic fields, such as loudspeaker or magnet.

3. Positions for placement should be stable and secure.

1.2 Maintenance method

1.2.1 Electric resistance method

Set the multimeter in resistance position and test whether the numerical value of resistance of each

point in the circuit has difference from the normal value to judge the trouble spot. But in the circuit the

tested numerical value of resistance is not accurate, and the tested numerical value of integrated IC's

pins can only be used for reference, so the elements should be broken down for test.

1.2.2 Voltage method

Voltage method is relatively convenient, quick and accurate. Set the multimeter in voltage position

and test power supply voltage of the player and voltage of a certain point to judge the trouble spot

according to the tested voltage variation.

1.2.3 Current method

Set the multimeter in current position and test current of the player of a certain point to judge the

trouble spot. But when testing in current method, the multimeter should be series connected in the

circuit, which makes this method too trivial and troublesome, so it is less frequently used in reality.

1.2.4 Element substitution method

When some elements cannot be judged good or bad, substitution method may de adopted directly.

1.2.5 Cutting method

Cutting method should be combined with electric resistance method and voltage method to use.

This method is mainly used in phenomena of short circuit and current leakage of the circuit. When

cutting the input terminal voltage of a certain level, if voltage of the player rises again, it means that the

trouble lies in this level.

- 2 -

1.2.6 Visualized method

Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding,

rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of

Elements appear. Check power supply of the machine and then use hands to touch the casing of part of

elements and check whether they are hot to judge the trouble spot. You should pay more attention when

using this method to check in high voltage parts.

1.2.7 Comparison method

A same good PC board is usually used to test the correct voltage and waveform. Compared these

data with those tested through fault PC board, the cause of troubles may be found.

Through the above maintenance method, theoretical knowledge and maintenance experience, all

difficulties and troubles will be readily solved.

1.3 Required device for maintenance

Audio Generator

Digital oscillograph ( 100MHE)

SMD rework station

Multimeter

Soldering iron

Pointed-month pincers

Cutting nippers

Forceps

Electric screw driver

Terminals connecting cord

Headphone

Microphone

- 3 -

Chapter Two

Functions and Operation Instructions

Section One TV SEGMENT

2.1.1 Features

Technical Features

#High quality color TFT panel

#Maximum resolution 640X480 for LD2006SI

#Built-in DVD player with Slot-in mechanism

#Multisystem TV tuner with NICAM decoding

#Biuilt-in stereo audio system

#USB port to playback compatible files stored on flash memory of external devises

#Composite video ,audio input

#Component, RGB/SCART and video inputs

#Digital coaxial output for multi-channel sound playback

#Headphones output

#Universal holder for furniture or wall fixation with 270 rotation angle

TV Channels Receiving and External Signal Playback

#Automatic and fine tuning functions with 100 channals memory

#Adjustable brightness, contrast, saturation, hue and 4 preset image settings

#Tone and sound balance adjustment and 4 preset audio settings

Disc playback mode

#Digital video playback:DVD-Video, Super VCD, VCD compatibility

#MPEG-4 standard support

#Digital audio playback: CD-DA, HDCD and Mp3 compatibility

#Digital graphic albums playback: Kodak Picture CD and JPEG

#Compatible disc types: CD-R/CD-RW, DVD-R,/DVD-RW, DVD+R/DVD+RW

#Russia, Cls and Baltic States adaptation interface and filenames ID3-tags and CD-Text support

simplifies device operation

#”Q-Play” function provides direct playback and allows to skip commercial that is not possible to

rewind

#”Browser” function provides easy access to playback control

#Automatic screensaver function

#Parental control function to protect children from watching inappropriate discs

#Super wide range of operating power supplies(~100-240v) automatic short circuit protection

- 4 -

2.1.2 Set list

LCD TV Remote Control AAA Battery RCA-RCA cord 2XRCA-2XRCA cord Wall Mount Holder Kickstand Screw M5X15 Screw M4X10 Screw PA5X25 Screw PM45X10 Expandable pipe User manual Warranty Card

2.1.3 CONTROLS AND FUNCTIONS

(1) Panel controls and indication

1pcs 1pcs 2pcs 1pcs 1pcs 1pcs 1pcs 1pcs 1pcs 4pcs 4pcs 4pcs 1pcs 1pcs

Left panel

SETUP button

Press to switch to setup mode

_VOL+button

Press to adjust the volume.

_CH+button

Press to switch between channels/to

choose menu item.

SOURCE button

Press to choose the playback mode.

Front panel

Remote control sensor

Power supply indicator

Right panel

Disc tray

USB port

EJECT button

Press to open/close the disc tray.

STOP button

STANDBY button

Press to switch on the device/into

standby mode.

POWER button

Turn on/off the power.

Headphones output

- 5 -

Press to stop the playback.

PLAY/PAUSE button

Press to playback/pause.

(2) Remote control general view

MENU button

DVD disk menu/PBC function.

ANGLE button

Press to change the camera angle/change the Mp3 and JPEG files playback mode.

Q-PLAY button

Press to turn the Q-PLAY mode on.

SUBT button

Press to change the subtitles language/change the display mode JPEG files.

Button

Press to switch on the device/into standby mode.

EJECT button

Press to open/close the disc tray.

LANG button

Press to change language.

DISP button

Press to display the disc information.

NICAM button

Press to choose audio mode.

Numeric buttons

BROWSE button

Press to turn on/off the browser function.

CURSORbuttons(UP/DOWN/LEFT/RIGHT)

OK button

SETUP button

Press to switch to setup mode.

Button

Press to return to the previous channel.

SOURCE button

Press to change the TV/DVD mode.

Button

Press to start rewind/rewind scanning.

Button

Press to skip backward.

REPEAT button

Press to repeat.

A-B button

Press to repeat the selected section.

Button

Press to turn on/off the sound.

VOLUME+/-button

Press to adjust the volume.

USB/DVD button

Press to select USB/DVD mode.

Button

Press to skip forward.

Button

Press to stop the playback.

Button

Press to forward scanning.

Button

Press to playback/pause.

ZOOM+/-button

Press to zoom in/out.

CANCEL button

Press to go one level back/cancel current operation.

CH button

Press to switch between channels /to choose menu item.

- 6 -

2.1.4 CONNECTION AND STARTING

SELECT RETURN

ENTER

SETUP

(1 )Switching interfaces

#You may adjust necessary parameters in the device menu. #Turn to Picture item on this page for details.

RF input

Meant for antenna connection.

COAXIAL OUT

Meant for multi-channel sound playback.

SCART socket

Meant for external audio video signal

source connection. There is no need to

use additional audiocord.

Y Cb(Pb) Cr(Pr)

AUDIO VIDEO IN

Used for external signal source

connection.

2.1.5

TV MODE

This LCD TV can store up to 100 channels and enables to scan channels thought automatic, manual and fine tuning scanning mode. Built-in TV tuner supports stereo audio playback in NICAM system.

(1) Adjusted channels selection

#Press +CH-buttons on the left panel or CH buttons on the remote control each time, when you want to change a channel. #Use numeric buttons to enter the number of the channel. #Press button to return to the previous channel.

(2) Default picture settings selection

#You may select one of the default picture settings: USER, STANDARD, DYNAMIC and SOFT.

(3) Default sound settings selection

#You may select one of the default sound settings: USER, MUSIC, FILM and NEWS. #You may adjust necessary parameters in the device menu. #Turn to page.13 for details.

(4 )Accompanying sound type #Only some of the TV channels have stereo

accompanying sound in NICAM system. #Press NICAM button to select accompanying sound.

(5 ) TV settings

#Press SETUP button to display the menu. #Use cursor buttons on the remote control or

+CH-buttons on the left panel to select the item. Use buttons to adjust selected parameter. Use OK button for confirmation. Press SETUP button again to return to the main menu or to exit TV SETUP.

(6) Picture

#select PICTURE item to adjust picture parameters.

#You may adjust BRIGHTNESS, CONTRAST, SATURATION, TINT, SHARPNESS and COLOR TEMP.

- 7 -

NOTE

You can’t adjust TINT while watching TV

channels.

(7) Sound

#Select SOUND item to adjust sound

parameters. #You may adjust BALANCE, BASS, TREBLE and NICAM.

(8) TV setup

Select TV SETUP item to adjust channels.

CHANNEL, COLOR SYSTEM, SOUND SYSTEM, FINE TUNING, AUTO SEARCH,

MANUAL SEARCH and CHANNEL EDIT. #CHANNEL item enables to select the number of adjustable channel. #CHANNEL EDIT submenu enables to select,

skip and swap the channel.

RETURN

SETUP

#CHANNEL parameter enables to select current channel. #SKIP function enables to make current channel

inaccessible while using +CH-button to browse channels.

#COLOR SYSTEM item can be changed between: AUTO, PAL and SECAM. We recommend to set this item to AUTO. #SOUND SYSTEM item can be changed between: B/G, D/K, Land I.

(9) Function

You may select LANGUAGE, TRANSPARENCY,

SLEEP and RATIO. #LANGUAGE item enables to select the OSD language. #TRANSPARENCY item enables to adjust transparency of OSD. #SLEEP item enables to set the sleep timer. #RESET item enables to reset all values to

default.

(10) Video settings

#Press SETUP button to display the menu.

#In external video signal playback mode the

menu is the same as the menu, described on

pages 12and 13.

NOTE

In external video signal playback mode TV

SETUP item is inaccessible.

#SWAP function enables to select the channel

number to swap with current channel. #SAVE parameter enables to confirm the swap function. #FINE TUNING item enables to adjust the channel frequency accurately. #MANUAL SEARCH item enables to change

channel settings. #AUTO SEARCH item enables to adjust channel setting automatically.

- 8 -

Section Two DVD SEGMENT

2.2.1 Controls and functions

Two USB PORTS

Disc tray

EJECT button

Press to open/close the disc tray.

STOP button

Press to stop the playback.

PLAY/PAUSE button

Press to playback/pause.

2.2.2 FUNCTION SETTINGS

(1) Function selection and change

#Press the SETUP key to show the setup menu. You will see the following image on the screen, as show on the figure: #Select the desired menu item using the UP/DOWN buttons button; press the OK key for confirmation.

Language

Image

Sound

Playback

Preference

Parental control

Initial help

Reset settings

Exit

Setup menu

DVD menu

Sound track

Subtitle

Off

1.For example, if you wish to change the image settings, you have to select the image item and press the OK or RIGHT key.

TV system

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

4:3

Off.

+48

AUTO

PAL

NTSC

- 9 -

2.Using the UP/DOWN buttons, select the

desired item and press OK or RIGHT button. For example, select the Sharpness item. Settings will appear on the screen. Then select the desired sharpness level and press OK for confirmation.

TV system

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

4:3

Off.

+48

High

Medium

Low

Off

3. Press LEFT for exit to previous menu level.

4. Press SETUP to exit setup menu.

(2) Language settings

1. Setup menu: interface language set-up

#Options: Russian, English, Ukrainian. #Default option: English.

Setup menu

DVD menu

Soundtrack

Sbutitles Off

2.DVD menu: selection of disc menu

language

3. Sound: selection of translation language

#Disc menu/translation language options:

Russian, English, Estonian, Lithuanian, Kazakh,

Romanian, Belarusian, Ukrainian, Chinese.

#Default menu/translation language option:

English.

#Selection of other languages: select the

OTHERS item using the wheel and press OK.

Enter the language code using the numeric

buttons and press OK.

#If the language you selected is not recorded on

the DVD disc, another available language will be

used.

4. Subtitles: selection of subtitles language

#Options: Off, Russian, English, Estonian,

Lithuanian, Kazakh, Romanian, Belarusian,

Ukrainian, and Chinese.

#Default option: off.

#Selection of other languages: select the

OTHERS item using the wheel and press OK.

Enter the language code using numeric buttons

and press OK.

English

#If the language you selected is not recorded on the DVD disc, another available language will be displayed.

(3) Image settings menu

1. TV system: TV system selection

#Options: Auto, PAL, NTSC. #Default option: Auto.

2.TV Format: image ratio settings

#Options: 4:3 pan& scan, 16:9 letterbox and 16:9 TV,4:3 LB. #Default option: 4:3 LB. #Some discs are recorded with support of only

one ratio. The selected ratio must comply with the TV screen.

TV system

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

Auto

4:3 LB

Off.

AUTO

PAL

NTSC

3.Sharpness: image sharpness adjustment

#Options: High, Middle, Low. #Default option: Low.

4. Gamma: adjustment of image color temperature

#Options: High, Middle, Low, Off. #Default option: Off.

5.Brightness: adjustment of image brightness

6.contrast: adjustment of image contrast

7.hues: adjustment of image hues

8.Saturation: adjustment of image saturation

Adjustment of image brightness, contrast, hues and saturation: #Select the desired item of the image adjustment section using the UP/DOWN buttons. Press OK or RIGHT key to start adjusting the relevant option. #Change the option value using the wheel. #Upon completion press the LEFT button of the UP/DOWN buttons to return to image setup menu.

(4) Sound settings menu

1.digital audio output a).SPDIF format: set-up of digital audio output options.

- 10 -

#Options: RAW, PCM. #Default options: RAW. #When you select the RAW option, the not decoded signal is transferred to the LCD Tv’s digital outputs, the decoded signal is transferred to analog outputs. Decoding is performed by the built-in decoder of the LCD TV. This feature is meant to ensure that signal decoding at digital outputs is performed by an external device(e.g.an amplifier). #If you select the PCM option, a PCM coded signal will be transferred to the LCD Tv’s digital outputs.

Digital output

Tuning

SPDIF format

LPCM

RAW

48kHz

B)LPCM:set-up of digital audio output options to comply with different amplifiers and receivers.

#Options: 48kHz 16 bit, 96 Khz 24 bit. #Default option: 48 Khz 16 bit.

2. Sound correction A)Equalizer: equalizer modes

#Options: Off, rock, pop live sound, dance music, techno classics, soft sound. #Default option: off.

B)Echo: echo effects

#Options: Off, concert, living room, hall, Bathroom, cave, arena, cathedral. #Default option: off.

C)Tone balance: adjustment of tone balance level.

#Adjust the tone balance level using the cursor buttons. #Press the LEFT button to return to sound correction set-up menu.

(5) Playback settings

1. DVD Advertisement skip: skip the unskippable block while playing a DVD disc.

#Options: Yes,No. #Default option: NO.

2. VCD/SVCD PBS menu: PBC menu on/off

#Options: On, Off. #Default option: On. #If On option is set, while reproducing discs, a menu will appear, in which you can select the order of playing the disc content. If the Off option is set, the reproducing of content is performed in the order, in which it is recorded on the disc.

DVD

VCD/SVCD

Files

Repeat

All types

Advertisemenu No

off

3.Files: selection of reproduced files on the disc

#Options: Audio, Pictures, Video, All types. #Default option: All types.

4.Repeat: file repeat mode

#Options: Off, Single, All. #Default option: Off.

(6) Preference settings

1.Screensaver: screen saver on/off

#Options: On, Off. #Default option: On.

Screen saver

Equalizer

Off

2.Equalizer: spectrum analyzer

#Options: On, Off. #Default option: Off.

(7) Parental control settings

1.Category: set-up of age restrictions to prevent children from seeing undesirable discs.

#Options: Any, Kid, G,PG, PG-13, PGR, R,NC-

17.

any

Kid

Allowed..

Set password

Any

PG-13

PGR

NC-17

2.Change password: set-up of a four-digit password to change the level of age restrictions.

#Default option: 7890

Old password

New password

Verify

Cancel

(8) Initial setup menu

Auto

PAL

NTSC

- 11 -

#Press the RIGHT key to enter the initial settings

Sign of trouble Cause of trouble Act ions t o ellminat e the trouble

No sound

1.Poor audio c able connec tion.

2.Disc dirty or damaged.

3.Sound disabled by the MUTE button.

1.Mak e proper connect ion.

2.Clean the disc .

3.Pres s the M UTE button.

No image

1.Poor video cable c onnecti on.

2.Incorrect sett ings of your TV set.

3.The TV is in the progressive scan mode while y our TV set does not s upport this mode.

1.Mak e proper connect ion.

2.Correct t he sett ings of your TV set.

3.Place the TV in the interlaced s can mode through the TV's m enu.

Blac k and whit e image

1.incorrect TV c olor sy stem selec ted.

2.Color level on the TV set adjusted incorrect ly.

1.Set the appropriate c olor sy stem via the menu: S ETUP>Image> TV sc an.

2.Readjust the c olor sy stem of your TV set.

menu, then select the desired item using the cursor buttons and press OK key for confirmation. #While being in this menu section, you cannot return to the previous level by pressing the LEFT key.

(9) Reset settings to default

Load factory settings

(10) Exit settings menu

Language

Image

Sound

Playback

Preference

Parental control

Initial setup

Reset to defaults

Exit

OK Cancel

#Select the exit item using the UP/DOWN buttons and press the OK key to exit the menu.

#Resetting all settings and restoring default options, except age restrictions level and password.

2.2.3 OTHERS

(1) Useful notes

#To extend the service life of your LCD TV make pauses of not less than 30 seconds between switching

off and repeatedly switching on the LCD TV.

#Disconnect the LCD TV from the wall outlet after shutdown.

#Some LCD TV’S functions may not be applied to some discs.

#Use supply sources of rated voltage, otherwise the LCD TV may not function or be damaged.

#In case of the LCD TV’s occasional stops, please switch the power supply off and then on again.

(2)Trouble shooting

Please check probable causes of malfunction before addressing the service center.

- 12 -

Disc s c annot be read

1.Disc not insert ed.

2.Disc ins erted inc orrectly.

3.Condensat e on the DVD player's laser head.

1.Insert the dis c.

2.Install the di sc with t he label s ide facing up.

3.Switch the TV on without disc for an hour.

Microphone does not operate

1.Microphone is unplugged.

2.Low level of the microphone's sound volume.

1.Connect the mi crophone.

2.Adjust the level of the mic rophone's sound volume.

Remote c ontrol does not operate

1.Remote control is i ncorrect ly direct ed at the TV's sc reen.

2.Distanc e to the TV i s in excess of 8 meters.

3.Run out bat teries .

1.Use t he remote c ontrol ac cording to the manual.

2.Decreas e the dis tanc e to the TV.

3.Replace both batt eries.

some functions do not work

1.Disc is recorded inc orrectly.

2.Incorrect key s equence.

3.St atic voltage on the housing.

1.W ait5-10 s econds and the device will automat ical ly t eturn to norm al state.

2.Repeat t he operation one more t ime.

3.Switch the device off for 1-2 min

Unstable image 1.Incorrect TV set set tings . 1.Correct the TV set set tings .

(3)Technical characteristics

LD1506SI LD1906SI LD2006SI

Type class

Size(") Height(mm) Width(mm)

228.19

304.13

0.297×0.297

256.5

410.4

0.285×0.285

20/50,8 306 408 0,707×0,707

Frequency

Vertical(Hz) Horizontal(kHz) Display color

Maximum Display Mode

Resolution Vertical frequency(Hz)

1024×768 75

1440×900 75

640×480 75

Inputs

Video Composite Component VGA RGB/SCART Audio Stereo PC audio Others USB RF

1 1 1 1

2 1

1 1 1 1

2 1

1 1

2 1

Audio outputs

Headphone Digital coaxial

1 1

TFT,colored ll(ISO 13406-2)

Display

50-75 30-75 16 700

- 13 -

Color system

TV tuner Video inputs

Sound system TV tuner

Disc types

Formats

:+12 :+12 -

Power supply

Power Consumption (Maximum)(w) Power Consumption (Power Saving)(w)

Environmental consideration

Operating temperature(°,C) Operating humidity(%) Storing temperature (°,C) Storing humidity(%)

Dimensions(mm) 438.7×295.7×73.4 498×370.6×82.5 620×450×202

Weight Net weight(kg) 6.5 7.1 8.1

+5 +35 10-80

-20 +45

CD-R/RW,DVD-R/RW,DVD+R/RW

DK,I,BG,L

Built-in DVD

player

DVD-Video,DivX,XviD,SVCD,VCD,CDDA,HDCD,MP3,WMA,Kodak Picture CD,JPEG

~100-240,50/60

Voltage and frequency(V,Hz) Voltage of external(V,A)

Power adapter

PAL,SECAM PAL, SECAM, NTSC 3.58, NTSC 4.43,PAL60

#We are permanently improving the quality of our products; hence the product’s design, functionality

and technical characteristics may be modified without prior notice.

#We do not guarantee that all discs can be played smoothly due to the disc quality, disc recording quality

and recording format.

- 14 -

Chapter Three Principle and Servicing

The previous manual: TV part

Section One Principle of the player

3.1.1 Function

LD2006SI is a 20” LCD_TV with multiple functions, such as DVD playing and USB reading function.

Electronic scheme of TV part adopts 20” TFT display screen+inverter components

(INV604)+MST718+STV8216 +TDA7266P+ tuner JS -6H2/T121. MST718 includes MCU/video A/D

converter/LCD image processing circuit. DVD part electronic scheme adopts MT1389HD+64M

SDRAM+16M FLASH+D5954. HD62 loader can smoothly read MPEG4/MP3/CD/DVD format discs and

decode chip MT1389HD may support USB and card read function.

# Digital picture adjustment technology to adjust sharpness, brightness, contrast, hue and

saturation of pictures; gamma correction.

# Video circuit supports PAL/NTSC/SECAM/PAL60 multi-system video signals.

# Support USB/card read function.

# Compatible with DIVX, MPEG4 format film.

# Support PAL BG/DK/I, SECAM BG/DK/L/L’ RF signal modulating.

3.1.2 Block diagram of the player

3.1.2.1 This machine is mainly composed of the following PCB semi-finished products and display

screen components. Please refer to model list for allocation of the player:

1. Main video board (21903-4): this PCB semi-finished product is the main part of the player. Main

video board includes audio/video input circuit, audio selecting and amplifying circuit, video selecting and

LCD drive circuit, DVD decode and servo circuit. The main function is to fulfill audio/video signals’

processing and DVD function’s fulfilment.

2. Power board (@52006-0UL): power board is mainly composed of rectifying circuit and filtering

circuit. This PCB semi-finished product’s main function is to provide the player with working power.

- 15 -

3. Inverter components (INV607): inverter components are mainly composed of boost circuit and

protection circuit. This PCB semi-finished product’s function is to provide display screen components

with lamp working voltage.

4. Remote control receiving board (B1903-1): this semi-finished product is composed of one IR

sensor and working indicator light. This PCB semi-finished product’s main function is receive the control

order that sends from remote controller and transmit to MCU part of main video board to control the

working state indication of the player.

5. TV button board 41903-0/DVD button board J1903-0: mainly composed of buttons which are

responsible for the function control of TV part and DVD part.

6. USB board D1903-1: this PCB semi-finished product includes USB jack circuit and it is mainly

responsible for USB read function.

7. Display screen components: include LCD display screen, lamp, LCD screen drive circuit and jack

circuit. The main function is to revert video signals to image to supply for clients to enjoy video images.

TUNER

If1

If2

U119 PN2020

TSDATA0~TSDA TA7

U116 MT8606

XIDD0

XIDD8

DVB/CARD switch U108/U2

MSD0

MSD1

CRAD BOARD

OPEN/ CLOSE circuit

LOAD+

LOAD-

DVD LOAD

DVB part

20.48MHZ

X602

XIDD0~XIDD15

GPIO_3

GPIO_4

TROPEN TRCLOSE

FOSO TRSO FMSO DMSO

SL+

SL-

Servo drive

U302 DVD

X109

27MHZ

FLASH

DFA[0:20] DFD[0:7]

Mt1389

DVD decode chip

TK+

Ba5954

U118

TKFC+

FC-

109

98 100

226 224

A/B/C/D/E/F

DVD PICK_UP

DPB

DPR

DDQ[0:15]

DMA[0:11]

DSCL

DSDA

89AL 89AR

Y PB PR INPUT JACK

EPR

Video

Electronic switch

FSAV433

SR SGSB

U301

SDRAM

DCVBSIN+/DCVBS-

EEPROM

U303

24C16

4580

U117

Audio amplifying circuit

U113

TEA5764

SCART JACK

J105

AV input terminal

U106

SCART JACK

TUNER

DVSTB DVSCK DVSDA

DRIN

DLIN

FMR FML

SRIN SLIN

AVRIN AVLIN

EPB

PRIN

PBIN

12MHZ

SCVBS+

SCVBS-

SCLTX SDARX

Video amplifying circuit

TV+/TV-

U107

Electronic switch

Cd4052

key-press board & receiving board of remote control

KEY2

X101

KEY1

7/8

9/10

12/13

25 67

22/23

30/31

73 83

Vs1

Vs2

8216_RST

AI3L

AI3R

PCLIN

Boost

VGA

control

JACK

circuit

U101 MST718 LCD image processor& MCU

T4094

VSDA

PANEL_ON

U102 CD4094

U111

NICAM processing circuit

STV8216

PC AUDIO

J103

PCRIN

SIOMAD

Brigtness

BLON

+12V

INVERTER_ON/OFF

SPICK SPIDI

U104 FLASH

SPIDO

PS25LV010

SPICZ

DG0~DG7

DB0~DB7 DR0~DR7

HSYNC VSYNC

DE CLKO

MST_RESET

VSCK

SEL_I/P

AMP_STB ANT-POW ASW MUTE

ONMUTE

LSL

LSR

9/10

AO2L

MONOIN

TUNER

U114

AO2R

U103 EEPROM 24C32

Reset circuit Q103 Ce101

Audio

amplifying

TDA7266

Audio output amplifying circuit

INVERTER

BOARD

PANEL

SCART

figure 3.1.2.1 Block diagram of the player

- 16 -

Annotate: 3.1.2.1 Block diagram explanation: this machine is divided to 3 parts according to

SN Material code Material name Specs & Model Qty

Position

Number

Function

1 790021 FET IRF7416 SOP 1 U511 (+)12V switch control pipe

2 883191 IC TDA7266SA ZIP 1 U112 Audio amplifying IC

3 882030 IC STV8216 TQFP 1 U111 NICAM processing IC

4 883189 IC MST718BE PQFP 1 U101 LCD image processing&CPU

5 883323 IC AP1506Adj TO263-5L 2 U503,U506 (+)5V voltage stabilizing IC

6 882953 IC K4S641632K-UC60 TSOP 1 U301 SDRAM

7 882076 IC LM1085-3.3 SOT-263 1 U521 DV33 voltage stabilizing IC

8 882883 IC FSAV433 TSSOP 1 U106 Components video selection IC

9 790126 SMD FET FDS9435A SOP 1 U502 Display screen power control pipe

10 880504 IC 24C32N SOP 1 U103 TV EEPROM

11 882756 IC HEF4094BT SOP 1 U102 Serial/parallel converter

12 882515 IC HEF4052BT SOP 1 U107

Sound source selecting electronic

switch

13 882485 IC AZ1117H-3.3 SOT-223 2 U505,U513 3.3V voltage stabilizing IC

14 883245 IC AZ1085S-2.5Z TO-263 1 U507 2.5V voltage stabilizing IC

15 882121 IC AK18 SOT-223 1 U1 1.8V voltage stabilizing IC

16 1020094 Tuner JS-6H2/T121 1 U114 Receive TV signal

17 900458 Software program ROMLD2006SI2-0A(2M) 1 U104 TV software program

functional module.

1. TV part: according to design demands, TV part mainly includes LCD image processing, audio

processing and amplifying circuit, MCU control circuit.

2. According to design demands, DVD part mainly includes decode circuit and servo circuit.

3. DVB circuit: DVB circuit mainly includes channel decoder and TS decoder. This machine does

not use this function, to facilitate understanding, so we use gray colour to mark the unused part in the

block diagram.

3.1.3 Function introduction to IC of the player

Function introduction to IC of the player is shown as in the following figure:

- 17 -

Section Two Unit Circuit Principle

3.2.1 System control circuit

System control circuit is mainly composed of reset circuit, clock circuit t, serial/parallel conversion

circuit, software program, EEPROM and MCU (MST718 is built inside). The built-in MCU of MST718 is

mainly responsible for the coordination and control of system of the player. This MCU is connected with

a 2M ROM externally, which is used to store software and control function of the player. Since I/O port of

MST718 is limited, a serial/parallel conversion circuit (CD4094)is added to extend I/O port. Functions

may be adjusted through software. MST718 is connected with a 32k EEPROM externally, used to store

user-set information.

1. System reset circuit

(1) system reset circuit is shown in the figure 3.2.1.1:

MST718

Figure 3.2.1.1 System reset circuit diagram

(2) Working principle: this circuit is a typical low level effective reset circuit. After power on, “+5V

EXT” changes from 0V to 5V,and charge R282 through CE101,Voltage of two ends of CE101cannot

change suddenly, now Q103 is saturated on, C-E electrode is connected, MST RESET is low level to

provide pin 68 of U101 with a low level reset signal to reset MST718. After capacitor CE101 is fully

charged, voltage on two ends is near to 5V, now Q13 cuts off, voltage of pin 68 of MST718 restores to

high level to finish reset action.Reset time of this circuit is about 100MS, which is decided by the value

of R282 and Ce101. Function of D100 is to discharge Ce101 quickly to ensure the reliable reset when

power on for the second time. The trouble that appears in this circuit is that machine cannot enter

standby state after power on, and machine fault after power on.

- 18 -

2. System clock circuit

(1) System clock circuit is shown in the figure 3.2.1.2:

120

MST718

121

Figure 3.2.1.2 System clock circuit

(2) Working principle: this clock circuit is mainly composed of X101, C104 and C103, in which X101

is a 12MHZ crystal oscillator; C104 and C103 are externally-connected resonance capacitors to produce

a 12MHZ clock signal to provide for MST718 to generate clock signal required by system through

internal doubling circuit to act as working clock.

3. System control principle

(1) System control schematic diagram is shown in the figure 3.2.1.3:

Key-press board

Reset circuit

Remote control board

MT1389HD

KEY1~KEY5

RESET

DVSTB DVSCK

DVSDA

U104

PS25LV010

T4094

SCART JACK

PIC

MST718

MCU

VSDA

VSCK

CLT S

SDAR

INVERTER ON/OFF

STBY

8216_RST

PANEL_ON

Inverter components

power control circuit

STV8216

PANEL_ON control circuit

U107

Cd4052

Audio input selection

Mute control circuit

Vs1

Vs2

U102

MUTE

Cd4094

Serial/parallel converter

ONMUTE

Figure 3.2.1.3 System control schematic diagram

- 19 -

ASW

ANT-POW

AMP_STB

SEL_I/P

U109/CD4053

DVB/TV

Tuner power control circuit

TDA7266 audio amplifying

LCD_TFT

(2) Working principle

System control circuit of the player is composed of the built-in MCU of MST718 and software

Program. Machine power on: after 12V power is being rectified by U503, +5V power outputs to provide

for system control circuit. The reset circuit of system control circuit begins to reset MST718, the red

indicator light on remote control receiving board is on under the control of STBY signal (high level), and

this means machine enters standby state.

The process from standby state to power on state: after pressing POWER button on panel or wake

code on remote controller, pin 57 of MST718 changes from high level to low level, pin STBY outputs a

low level signal to make Q117 cutoff, /STBY skips to high level, STBY is divided to 3 parts: +5V power

control circuit composed of Q3/U506; +12V power control circuit composed of Q117/U511 and standby

indication circuit on remote control receiving board. Power supply of machine is normal, MST718 begins

to output reset and other control signal (please refer to waveform diagram for sequence of each control

signal output) to reset and control circuit of other module to make machine enter normal working state.

The process from working state to standby state: when machine is in power-on state, after

pressing POWER button on panel or wake code on remote controller again, machine enters from power-

on to standby, now pin 57 of MST718 outputs high level, /STBY pin output low level, +5V power and

+12V power of machine are cut off and machine enters standby state.

4. IIC bus control circuit

(1) IIC bus control circuit block diagram is shown in the figure 3.2.1.4:

U101

MST718

TUNER

SDA

SCL

U103

24C32

Ic301

STV8216

Figure 3.2.1.4 IC bus control circuit block diagram

U119

PN2020AT

U113

TEA5764

(2) Working principle: IIC bus is a kind of simple, dual-direction and synchronous serial line

developed by PHILIPS company. Only 2 lines (serial clock line and serial data line) are required to

connect between components on bus to transmit information. This bus is high-performanceserial bus

which has function of decision and synchrony of high and low speed devices required by multi-player

system with wide application range. shown in the figure 3.2.1.4, U103 is a 32K memorizer used to store

user information.

- 20 -

5. Serial/parallel conversion circuit

(1) Serial/parallel conversion circuit is shown in the figure 3.2.1.5:

SEL_I/P

AMP_STB

ANT_POW ASW Vs1

Vs2 MUTE

ONMUTE

MST718

MCU

T4094

VSDA

VSCK

Figure 3.2.1.5 Serial/paralle conversion circuit

Serial/paralle

converter Cd4094

(2) Working principle:

Because jack of MST718 is limited, in order to extend control port, a serial/paralle converter

(CD4094) is added in MCU peripheral. CD4094 is a serial in/paralle out high speed converter with output

latch and 3-mode control and its advantages are easy usage, low power consumption, strong drive and

flexible control. {1} pin is latch end, {2} pin is serial data input end, {3} pin is serial clock end. When {1}

pin is high level, the increase of 8-bit paralle output port Q1~Q8 changes with serial input; when {1} pin

is low level, output is locked. Using latch end may conveniently perform chip selection and output control.

{15} pin is parallel output state control end, when {15} pin is low level, parallel output end is in high

resistance state; when using CD4094 as display output, the display number may flicker. QS of pin {9}

and Q’S of pin {10} are serial data output end. Control signals after conversion are used in control mute

circuit/sound source selection circuit.

6. Working state indication circuit

(1) Working state indication circuit is shown in the figure 3.2.1.6:

Figure 3.2.1.6 Working state indication circuit diagram

- 21 -

(2) Working principle: when machine is in standby state, pin 57 of MST718 outputs high level signal

To make standby control circuit \STBY signal outputs low level signal. This signal is directly connected to

pin 3 of remote control receiving board flat cable holder Cn801. This control signal inputs to base

electrode of Q801/Q802 through R804/R805 to make Q802 cutoff, Q801 is connected, the red light of bi-

color diode D801 is on, which means that machine enters standby state. After pressing POWER button,

machine enters working state, pin 3 of ,Cn801 outputs high level to make Q802 on/Q801 cutoff, the

green light of b-icolor D801 is on, which means machines enters working state. S801 is IR sensor to

receive remote control signals mainly.

3.2.2 Audio circuit

Audio processing circuit is mainly responsible for the switch, amplifying and restire of audio and

composed of audio source input selection and NICAM processing circuit, audio amplifying circuit and

mute control circuit. Audio processing circuit block diagram is shown in the figure 3.2.2.1:

PC AUDIO J103

TUNER

U117 4580

AV_IN J105

SCART JACK

DRIN

DLIN

AVRIN AVLIN

SRIN SLIN

PCLIN

PCRIN

MONOIN

SIOMAD

CD4052

Electronic switch

Figure 3.2.2.1 Audio processing circuit block diagram

1. “Nicam” processing circuit

73 78

Multi-channel

audio selection

NICAM signal

processing

Ic301

AI3L

AI3R

Vs1 Vs2

STV8216

CD4094

LSL

LSR

TDA7266

Audio amplifying

Audio output amplifying

circuit

1 2

Headphone socket

(1) NICAM: the core technoloy of “NICAM” is the NICAM728 technology developed by BBC.

Besides transmitting TV image and simulating mono-channel signal, NICAM TV broadcasting system also

transmits dual-channel digital coding sound signal. NICAM is famous for clear treble and deep bass with

the sound quality close to listeing to CD disk directly. In the aspect of SNR, dynamic range and channel

separation index, NICAM is far better than the current FM accompany. As TV accompany, NICAM

applies 3 kinds of working mode currently: 1) Bilingual mode: NICAM transmits dual-channel digital

sound relevant or irrelevant to the current program and transmits 3-channel sound signal together with

- 22 -

The original FM analog accompany, which are suitable for multi-language areas; 2) Stereo mode: two

digital channels of NICAM transmit left and right channel sound signals of stereo separately, and the

original FM analog accompany only transmits mixed sound signals of 2 channels to be compatible with

TV set without NICAM function; 3) Mon0-channel mode: two channels of NICAM transmit one channel

sound signals and one channel data signal, which is equal to providing 3-channel signals together with

the original TV analog accompany.

(2) “NICAM” processing circuit: when tuner receives NICAM signal, it outputs from pin 11 of tuner

(SIOMAD), and inputs into pin 73 of STV8216 through the filtering circuit composed of C301, C302

components and then restores to audio signal through being modulated by internal circuit of STV8216

and sends to audio amplifying circuit through pin 28, 29 of STV8216. STV8216 block diagram is shown

in the figure 3.2.2.2:

Figure 3.2.2.2 STV8216 internal block diagram

2. Sound source input selection circuit

Besides NICAM processing circuit, STV8216 also includes multi-channel sound source selection

function. After the machine enters from standby to power-on, systems sends a low level effective reset

signal to pin 43 of STV8216 to reset STV8216. IIC bus means is adopted between STV8216 and

MST718 for communication. When system working state is set in SCART input, Cd4052 outputs SCART

signal under the control of MST718 and then input to STV8216, now pin 23, 24 of STV8216 output the

audio signals inputted by SCART_IN and also output two groups of audio signals as external output

signal through pin 18, 19. Working principle of other groups’ sound source input is the same, so we will

not introduce here.

External input sources of this player are many and input port of STV8216 cannot meet the demands,

so a CD is added in front of STV8216 to switch in DVD_AUDIO/external input terminal and SCART

AUDIO input port.

- 23 -

+ 138 hidden pages