BBK LD1916DK Service manual

LD1916DK(RU)

Service Manual

Model version:M7C1V2.00 M7C2V2.00

7 7

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

2.1.6 PC Monitor mode

2.2 Section Two DVD segment

2.2.1 Controls and functions

DVD Function settings

2.2.2

2.2.3 DVB Function settings

2.2.4 Others

Chapter Three Principle and Servicing

The previous manual: TV part

Section One Principle of the player

3.1.1 System control principle

OVerall wiring diagram

3.1.2

3.1.3

3.1.6

3.1.7 Block diagram of DVB

Section Two Troubleshooting flow chart

Section Three

Block diagram of the player

Audio circuit

3.1.4

3.1.5

Power circuit

Video circuit

Waveform diagram

The next manual: DVD part

Section One Principle of the player

3.1.1 Audio circuit

3.1.2 Video

3.1.3 Servo circuit

3.1.4 USB/CARD circuit

3.1.5 Decode circuit

Section Two Troubleshooting flow chart

Section Three

Chapter Four

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two Circuit diagram

circuit

Waveform diagram

Block Diagram of Play Disassembly and Explosion

Chapter Six BOM List

Caution :

This Service Manual is applicable to LD1916DK(RU)-2 M7C1V2.00,M7C2V2.00.

Chapter One About Maintenance

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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.

1.1.4 Precautions for laser head

- 2 -

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.

1.2.6 Visualized method

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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

Chapter Two

- 4 -

Functions and Operation Instructions

2.1 Section One TV SEGMENT

2.1.1 Features

Technical Features

#High quality color TFT panel(15 inch for LD1516DK, 19 inch for LD1916DK ) #Maximum resolution 1366X768 for LD1516DK,1440X900 for LD1906DK. #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 VGA 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

#DVB-T turner for watching digital TV channels. #Automatic and fine tuning functions with 100 channels 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, and HDCD 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

PC monitor mode

#Wide resolutions range #RGB setting and 4 presets of color temperature #Tone and sound balance adjustment and 4 preset audio settings #External audio signal playback.

2.1.2 Set list

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LCD TV Remote Control AAA Battery Power Adapter Power Cord RCA-RCA cord 2XRCA-2XRCA cord Microphone Microphone cable Wall Mount Holder Screw M5X15 Screw PA5X25 Screw PM4X10 Expandable pipe User manual Warranty Card Karaoke disc

2.1.3 CONTROLS AND FUNCTIONS

(1) Panel controls and indication

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

For LD1516DK

For LD1916DK

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.

STANDBY button

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Press to switch on the device/into

standby mode.

POWER button

Turn on/off the power.

Headphones output

Microphone input 1

Microphone input 2

Front panel

Remote control sensor

Power supply indicator

(2) Remote control general view

Button

Press to turn on/off the sound.

VOLUME+/-button

Press to adjust the volume.

Right panel

Disc tray

USB port

EJECT button

Press to open/close the disc tray.

STOP button

Press to stop the playback.

PLAY/PAUSE button

Press to playback/pause.

EJECT button

Press to open/close the disc tray.

LANG button

In DVD and DVB mode, press to change language..

DISP button

Press to display the disc and the current source information..

RATIO button

Press to switch a pect ratio mode.

Numeric buttons

-/-- button

Press to switch one or two-digit program number..

CURSOR buttons

OK button

SETUP button

Press to enter setup mode.

Button /GOTO

Press to return to the previous channel in TV and DVB mode/To play from a certain time point in DVD mode.

SOURCE button

Press to change the mode.

Button /INFO

Press to start rewind/rewind scanning/To display the information about channel and program in DVB mode.

Button

Press to skip backward.

REPEAT button

Press to repeat.

A-B button

Press to repeat the selected section.

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USB/DVD button

Press to switch between USB/DVD modes.

Button

Press to skip forward.

Button

Press to stop the playback.

Button AUDIO

Press to forward/forward scanning/In DVB mode, to change sound track between left, right and stereo.

Button /TV/

Press to playback/pause/Switch between TV and radio modes, valid in DVB mode.

ZOOM+/-button

Press to zoom in/out.

FAV button

In DVB mode, open favourite channel list.

CH button

Press to switch between channels /to choose menu item.

MENU / EPG button

DVD disk menu/PBC function/To display the program guide valid in DVB mode.

ANGLE button

Press to change the camera angle.

Q-PLAY button

Press to turn the Q-PLAY mode on.

SUBT button

Press to change the subtitles language.

Button

Press to switch on the device on/into standby mode.

2.1.4 CONNECTION AND STARTING

SELECT RETURN

ENTER

(1 )Switching interfaces

SETUP

Y Cb(Pb) Cr(Pr)

PC AUDIO IN

Meant for PC stereo audio output connection.

COAXIAL OUT

Meant for multi-channel sound playback.

AUDIO VIDEO IN

Used for external signal source connection.

12 V socket

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

For LD1516DK and LD1916DK

RF input

Meant for antenna connection.

VGA port

Meant for PC connection.

SCART socket

Meant for external audio video signal source connection. There is no need to use additional audiocord.

(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

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#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.

(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.

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.

ATTENTION! We recommend watching TV at halfof maximum level of the sound. Continuous listening at higher level may lead to hearing reduction.

#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. #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

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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. #RATIO item can be changed between 16:9 and

4:3,ZOOM1 and ZOOM2. #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.

(2)Sound

Select SOUND item to adjust sound

parameters.

You may adjust BALANCE, BASS, TREBLE

and NICAM.

(3)Monitor setup

Select MONITOR item to adjust such parameters as PHASE, FREQUENCY, HPOSITION and V-POSITION.

2.1.6 PC MONITOR MODE

(1)Picture

Select PICTURE item to adjust picture

parameters.

You may adjust BRIGHTNESS, CONTRAST,

COLOR TEMPERARURE and AUTO CONFIG.

#Select COLOR TEMPERATURE subment to

adjust color temperature of the picture. #COLOR TEMP. Item can be set to :USER, NORMAL, WARM and COOL. #RED, GREEN and BLUE items enables to adjust RGB value of color temperature. #Use AUTOCONFIG to configure display parameters automatically. NOTE:

The picture can be displayed incorrectly

while adjusting.

(4)Function

You may select LANGUAGE, TRANSPARENCY, SLEEP and RADIO. #LANGUAGE item enables to select the OSD

language.

#TRANSPARENCY item enables to adjust

transparency of OSD.

#SLEEP item enables to set the sleep timer.

#RATIO item can be changed between 16:9 and 4:3,ZOOM1 and ZOOM2. #RESET item enables to reset all values to defaule except ratio function.

2.2 Section Two DVD SEGMENT

- 10 -

2.2.1 Controls and functions

Front panel controls

For LD1516DK

For LD1916DK

USB port

EJECT button

Press to open/close the disc tray.

STOP button

Press to stop the playback.

PLAY/PAUSE button

Press to playback/pause.

Disc tray

Note: This model does not support the 8cm disc. Do not insert that type of disc into this device to avoid disc jam.

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 DVD FUNCTION SETTINGS

(1) General setup

1.TV Display: This item is used to set the output picture ratio of this unit. #Optional settings: Normal/PS, Normal/LB, Wide Squeeze; Default: Wide.

2.OSD language: This item is used to set the OSD language. #Optional settings: English, Russian; Default: English.

3.Screen Saver: Open or close the screen saver. #Optional settings: On, Off, Default: Off.

4.Last Memory: This player can save the currently played time point automatically when you leave the current DVD disc playback(switch from DVD signal source to other signal source, enter standby state in DVD mode.) #Optional settings: On, Off. Default: On

NOTE: When switching to DVD playback state again, this player can automatically search the time point saved last time to continue playing. If you want to play from the beginning. Please press button Twice and then press button.

(2) Audio setup

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1.Down mix mode: this item is used to set this unit’s DOWN MIX mode to change multi channel audio into 2-channel audio output. #Optional settings: LT/RT, Stereo; #Default: Stereo

2. Dolby Digital Setup: Dual Mono: #Optional settings: Stereo, L-Mono, R-Mono, Mix-Mono; #Default: Stereo Dynamic: #Set Dolby digital sound dynamic level, #Default: Off.

5. HDCD: Set filter mode. #Optional settings: Off, 1X, 2X; #Default: 1X.

6. MIC Setup:

This item may be used to set volume and echo of microphone. MIC: Set MIC switch. #Optional settings: On, Off; Default: On. MIC VOL: Volume adjustment of microphone. # In micrpohone setup page, press button to select “MIC VOL” item and press OK button to enter adjustment menu. Press button to adjust setup value. After adjustment, press OK button to return to microphone setup page. Echo Level: Echo adjustment of microphone. #In micrpohone setup page, press button to select” Echo Level” item and press OK button to enter adjustment menu. Press button to adjust setup value. After adjustment, press OK button to return to microphone setup page.

3.Equalizer:

#EQ Type: Set equalizer type, optional settings: None, Rock, Pop, Live, Dance, Techno, Classic, Soft; Default: None. #Bass Boost: Enhance low frequency sound level, optional settings: On, Off, default: Off. #Super Bass: Enhance very low frequency sound level, optional settings: On, Off .default: Off. #Treble Boost: Enhance high frequency sound level, optional settings: On, Off, default: Off.

4.3D Processing: Set reverberation mode. #Optional settings: Off, Concert, Living Room, Hall, Bathroom, Cave, Arena, Church; #Default: Off.

(3) Video setup

1. Sharpness: This item is used to set the sharpness of video outputs. #Optional settings: High, Medium, Low; Default: Med.

2.Brightness: This item is used to set the brightness of video outputs.

3.Contrast: This item is used to set the contrast of video outputs.

4.Gamma: This item is used to set the color temperature of video output. #Optional settings: High, Medium, Low, None; #Default: None.

5.Hue: This item is used to set the hue of video outputs.

6. Saturation: This item is used to set the saturation of video outputs.

(4) Preference setup

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1. TV Type: To set the output video system of this player. #Optional settings: PAL, Auto, NTSC; Default: PAL.

2. PBC: To set the PBC status. #When playing SVCD, VCD2.0 discs, if PBC is set On, this unit enters PBC playback mode; if PBC is set Off, the unit will play the disc according to track sequence. Optional settings: On, Off; Default: On.

3.Audio: This item is used to set the preference audio language when playing.

4.Subtitle: This item is used to set the preference subtitle language when playing.

5.Disc menu: This item is used to set the preference disc menu language when playing. #Default of disc menu language: English NOTE: #Audio, subtitle and disc menu language are only effective in DVD mode. #If the disc is not recorded with the language you appointed, the unit will apply the language that the disc appointed to play. #Select other languages: press button to move cursor to “OTHER” item. Press OK button and then number buttons to input the language code you desired. After input finishes, press OK button again.

6.Parental: this item is used to set the parental control ratings to prevent children from watching restricted contents.(In the event the disc supports this function) #Optional settings: KID SAFE, G, PG, PG 13,PGR,R,NC17,ADULT, Off, Default: Off. NOTE: #When changing the parental control ratings, a password is needed. Please refer to the following password item for details.

7.Country Region: Set the country region according to your country.

8.Default: This item is used to restore all settings to the default value except” Parental control” and “ Password” in the setup menu.

(5) Password setup

Password: This item is used to set a six digit password to enable you to change the parental control ratings. Password Mode: To set whether parental control function needs a password, optional setting: On, Off; Default: On. Password: To change the password of the parental control function, default:000000.

2.2.3 DVB FUNCTION SETTINGS

Turn on the TV. Press SOURCE button to change source to DVB, then you can enjoy the rich and colorful contents of Digital Video Broadcast! In DVB mode, press SETUP button, then press button to choose DVB item, the DVB setup menu will be displayed as follow:

(1) General setup

1.TV Display: This item is used to set the output

picture ratio of this unit. #Optional settings: Normal/PS, Normal/LB, Wide Squeeze; Default: Wide.

2.OSD language: This item is used to set the

OSD language. #Optional settings: English, Russian; Default:

English.

3.TV Type: To set the output video system of this

player. #Optional settings: PAL, Auto, NTSC; Default:

PAL.

4.Default: This item is used to restore all settings

to the default value except” Parental control” and “Password” in the setup menu.

(2) Video setup

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1.Sharpness:This item is used to set the sharpness of video ouputs.

#Optional settings: High, Medium, Low; Default:

Med.

2.Brightness: This item is used to set the brightness of video outputs.

3.Contrast: This item is used to set the contrast of video outputs.

4.Gamma: This item is used to set the color temperature of video output.

#Optional settings: High, Medium, Low, None;

Default: None.

5.Hue: This item is used to set the hue of video outputs.

6.Saturation: This item is used to set the saturation of video outputs.

2.Time zone To choose your time zone, it is set depending on your country. If you don’t know the exact time, please ask local time manage department. Default:03:00

3.Parental age This item is used to set the parental control ratings. To prevent your children watching undesired programmes. #Optional settings: 4,5,6,7,8,9,10,11,12,13,14,15,16,17,18, Disable Default: Disable

4.Antenna power Turn on/off antenna power supply. Optional settings: On. Off; Default: Off

5.Channel setup This item is used to search channels, edit the channel list or your favourite channel list. View program guide information, etc.

(3) DVB-T setup

The DVB-T Setup Page is composed of five parts: Area, Time Zone, parental Age, Antenna Power, Channel Setup. Note: Press button to select different item, and press OK or button to enter it. Press button to return to the previous menu or to exit the current menu.

1.Area

You can choose the area of your country. Optional settings: Australia, Austria, Belgium, Russian, Denmark, Estonia, Germany, Spain, France, ltaly, Netherland, Taiwan, Others; Default: Russian. Note: you must set the correct area before searching channels.

GOTO

- -

Auto Scan Connect the antenna to the Therefore socket

on the TV, if the antenna needs a power supply, turn on/off antenna power supply in the menu. Then you can automatically search channels

without entering any other information. In the scan process, the scan result will be displayed in the Auto Scan window. Press SETUP button to enter setup menu, then

choose the DVB item; Using the button to select the Auto Scan item, and press OK or button to select Start item, then press OK button; A prompting message will be displayed to

request that you confirm, select” OK” and press

the OK button to confirm.

Note: If you press the SETUP button during scanning, the operation is stopped and a prompting message will be displayed at the buttom of Auto Scan window. Select” OK” and press [OK] button to abort auto scan operation, and the channels found until then will be saved.

And select “ Cancel” and press OK button to

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return to auto scan process. Wait while the TV searches for the channels, this may take a few minutes. Once you press OK button to start auto

search operation, all the saved channels will be

cleared. Please don’t press any button during the course fo default operation. Manual scan

1. In setup menu, select” Manual Scan”, a manual scan will be shown as follows:

2. Enter the frequency you want to scan by the number buttons, then press “OK”, the scan button seems be pressed, press “OK” again to scan, a scan sign: scanning will be shown on the window.

3. The scan result will be displayed on the right halt of the manual scan window, you can save the found channels or delete them if the TV has the same program.

When playing a program on a channel, press EPG button, then a program information list of current channel will be displayed in a window, move the cursor to PROGRAM, then press OK button, a more detailed program list will be displayed, move the cursor to the program which you want to watch, then press OK button on remote control as shown in the window. The program is saved in your reserved channel.

DVB

You can set the time when the reminding signal should be displayed before the program starts.

Adjust channel You can set your favorite channel, set parental control age for some channels or delete channel in Adjust Channel window.

1. Select channel using button, Press number

button 1 to set this channel as one of your

favorite channels.

2. Select channel using button, if you don’t like

this channel press number button 2 to skip it.

3. Select channel using button, press number button 3 to set this channel as a protected one, to prevent children from watching the undesired program. Note: If you set a channel protected, a password

will need to be inputted in the Protect Channel

window. The default a password is 000000. Channel remap You can change every channel position as you like in channel remap window. Reserve channel If you want to watch a special program on a channel at a later time, you can reserve it. Then a reminding signal will be displayed on screen several minutes before it starts.

(4) Password setup

Password: This item is used to set a six digit password to enable you to change the parental control ratings.

Password Mode:

To set whether parental control function needs a password, optional setting: On, Off; Default: On.

Password:

To change the password of the parental control function, default:000000

2.2.4 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.

- 15 -

#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.

(3) Technical characteristics

- 16 -

#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.

Chapter Three Principle and Servicing

- 17 -

The previous manual: TV part

Section One Principle of the player

3.1.1 System control principle

System control schematic diagram is shown in the figure 3.1.1.1:

Key-press board

Reset circuit

Remote control board

MT1389HD

Mute control circuit

FSAV433

KEY1~KEY5

RESET

DVSTB

DVSCK DVSDA

MUTE

ONMUTE

VS1

VS2

U104

PS25LV010

SPIDI

SPICZ

SPIDO

SPICK

SCART JACK

U101

IC-MST718MCU

T4094

Serial/parallel converter

VSDA

U102

CD4094

VSCK

SCLT

SDA

INVERTER ON/OFF

PANEL_ON

FCLK

FDATA

FCS

ASW

8216_RST

STBY

FMUTE

Inverter components

Emitting module of RF

BH1418

PANEL_ON control circuit

DVB Moduie

STV8317

power control circuit

BH1418

Figure 3.1.1.1 System control schematic diagram

3.1.2 OVERALL WIRING DIAGRAM

PANEL

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M156B1-L01 15" TFT

1210554

EARPHONE&MIC PHONE BOARD

61901-2

4941233

CN102

CN701

5IN403-2

INVERTER BOARD

5462457

DVD-PICK UP

DVD LOARD

TD-S208-62SV1 PICKUP

2380370

GND +12V +12V Brightness GND BLON GND

GND LD-DVD NC +5V MDI LD-CD VRDVD VRCD NC E +5V V20 GND F B A RFO IOA D C TKTK+ FC+ FC-

SL- SL+ LIMIT GND SP+ SP-

TROUT DISCEJT GND

+5V

TRIN GND

+5V

CN101 CN103

CN107

CN108

CN119

J501

GND

ARPLIN-

CN113

AMPROUT-

AMPROUT+

AMPRIN+

GND

+12V

DET#

OKA

LVACKP

LVA3 M

LVA3 P

GND

VCC-PANEL

LVACKM

LVA2 P

LVA1 P

LVA1 M

GND

LVA2 M

LVA0 P

GND

LVA0 M

GND

LVBCKM

LVA3 P

LVA3 M

LVBCKP

LVB0P

LVB1M

LVB0M

LVB1P

LVB2M

LVB2P

CN111

GND

CN2

MAIN BOARD

21901-4

4941840

CN110

CN102

CN105

CN104

CN106

LD1916DK

Block diagram for machine

MSD

MSD2#

12VSW

GND

5449509

@5AK0833-0

POWER ADAPTER

figure 3.1.2.1 overall wiring diagram

CLK

MSD3#

GND

SDCLK

USB_SWITCH

GND

MSBS#

SDCMD

MSINS

SDCD

GND

SDD0

4941842

D1903-4

CRAD&USB

BOARD

BP S

Dv33

GND

SDD1

SDD2

SDD3

GND

USB

GND

5VEXT

GND

STBY

KEY1

+5V

B1903-3

REMOTE BOARD

GND

4942009

DVD KEY BOARD

GND

SW1

KEY2

J1903-0

SW2

41903-0

5449477

5449438

TV KEY BOARD

- 18 -

3.1.3 Block diagram of the player

- 19 -

BOARD

INVERTER

U104 FLASH

BLON

Brigtness

+12V

PS25LV010

LVA0 P LVA3P

SPICZ

SPIDI

SPICK

SPIDO

INVERTER_ON/OFF

Control circuit

of boost

voltageboard

JACK

VGA

KEY1

KEY2

Button board

& receiving

board of RC

7/8

9/10

12/13

PBIN

PRIN

EPR

EPB

U106

FSAV433

Video

electronic

switch

YPBPR

INPUT

JACK J105

PANEL

U103

LVBCKP LVBCKM

LVB0P L VB3P

LVA0 M LVA3M

U101

X101

LVB0M L VB3M

LVACKP LVACKM

MST718

LCD picture

processor&MCU

12MHZ

SDARX

Video

SCLTX

SCVBS+

SCVBS-

SCART

JACK

SR SGSB

SCART

RF_OUT

VIDEO

AUDIO

21901-4

24C32

EEPROM

Reset circuit

Q103 Ce101

STBY1

8216_RST

FMUTE

ASW

ONMUTE

MUTE

VS1

MST_RESET

VSCK

VSDA

T4094

U102

PANEL ON

VS2

CD4094

amplify

30/31

22/23

DRIN

DLIN

FMR

FML

TV+/TV-

U117

DVSCK

DVSDA

DVSTB

U114

TUNER

U113

TEA5764

MC4580Audio

amplifying circuit

Amplify

U112

Audio

amplify

TDA7266

Audio output

amplifying

RF_OUTPUT

LSL

LSR

BU1418

FLIN

circuit

FM Modulate

AO2L

AO2R

FRIN

STV8317

NICAM

processing

circuit

AVRIN

PCLIN

J103

PC AUDIO

SRIN

MONOIN

U114

TUNER

SIOMAD

PCRIN

AVLIN

SLIN

J105

SCART JACK

A/V input terminal

DCVBSIN+/DCVBS-

U303

U301

SDRAM

DPB

DPR

DDQ[0:15]

U302

DVD

FLASH

U115

DMA[0:11]

Mt1389

24C16

EEPROM

DSDA

DSCL

89AL

226

100

109

CS5340A/D

89AR

Convertion

ABCK

ALRCK

AMDATA

224

OKA

MIC

BOARD

61506-2

DVD

PICK_UP

A/B/C

D/E/F

FC-

FC+

TK+

TK-

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

X109

DVB Part

If1

If2

TUNER

U119

27MHZ

X602

20.48MHZ

PN2020

XIDD0 XIDD15

TSDATA0 TSDATA7

U116

MT8606

DVD decode chip

GPIO_4

GPIO_3

XIDD0

XIDD8

DVB/CARD

Conversion

MSD1

MSD0

CRAD

switch

U108/U2

BOARD

FOSO

TRSO

FMSO

TROPEN

TRCLOSE

U118

BA5954

Servo driving

DMSO

SL+

SL-

LOAD+

LOAD-

open/close

Tray

circuit

DVDLOAD

figure 3.1.3.1 Block diagram of the player

3.1.4 Audio circuit

- 20 -

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 3.1.4.1:

MT1389

ALRCK

ABCK

AMDATA

CS5340A/D conversion

OKA

MIC BOARD

61506-2

89AL

226

89AR

224

PC AUDIO

J103

U114

TUNER

SCART JACK

J105

A/V input terminal

U117

MC4580Audio amplify circuit

Figure 3.1.4.1 Audio processing circuit block diagram

DLIN

DRIN

PCLIN PCRIN

SIOMAD MONOIN

SLIN SRIN

AVLIN

AVRIN

28 29

STV8317 NICAM

92 98

processing circuit

9 10

19 20

LSL

LSR

AO2L AO2R

U112

TDA7266

Audio

amplifying

Audio output

Amplifying circuit

3.1.5 Power circuit

Power circuit supplies stable and pure power for each unit circuit to ensure normal working of the

player. Power circuit block diagram is shown in the figure 3.1.5.1:

AMPRIN+

AMPLIN+

AMPROUT+

SCART

61506-2

AMPLOUT+

IC 503

AP1506

U511

+12V

Power adapter

Standby

control circuit

AP1506

U506

INVERTER BOARD

U502

Si9435

Figure 3.1.5.1 Power circuit block diagram

+5VEXT

+12V

STBY

U505

AMS1117

U507

Lm1085

MST718

U513

AMS1117

U521

Lm1085

FOR PANEL

3.3V

+2.5V

MST718

+3.3V

1.8V

Dv33

3.1.6 Video circuit

- 21 -

Video circuit is mainly responsible for the input of external video signals, the processing of video

signals send from tuner, and the drive processing of LCD screen, including video input selection, video

A/D conversion circuit, LCD picture processing circuit and video output circuit. Video circuit block

diagram is shown in the figure 3.1.6.1:

Y PB PR INPUT JACK

185

183

182

Mt1389

187

EPB EPR

U106

Video

Electronic switch

DPB

DPR

FSAV433

DCVBSIN+/DCVBS-

SCART JACK

PRIN

PBIN

X101

12MHZ

SCVBS+ SCVBS-

SCLTX SDARX

Video

amplifying

7/8

9/10

12/13

U101 MST718LCD picture processor&MCU

25 67

22/23

30/31

LVA0~3P

LVA0~3M

LVB0~3P

LVB0~3M

LVACKP LVACKM LVBCKP

LVBCKM

BIN+ BIN-

GIN+ GIN-

RIN+ RIN-

VGA-VSYN

VGA-HSYN

TV+/TV-

PANEL

VGA JACK

TUNER

Figure 3.1.6.1 Video circuit block diagram

3.1.7Block diagram of DVB is shown in figure3.1.7.1:

1.LD1506DK machine consists DVB function and can demodulate DVB-T signal.LD1506DK

does not consist this circuit.DVB part of this machine adopts PN2020AT+MT8606 and other

elements. Block diagram of DVB part is shown as follows:

STV8317

XIDD0~XIDD15

XIDA0~XIDA2

0689_CLK 8606_RST

XIIORDY ASDFAT0 XIINTRO

XIDIOW

SIDIOR

MT1389

Aideo/Video

Decoder

U114

TUNER

TV+

MST718BU

TV-

IF1 IF2

TUNSDA_D1

TUNSCL_D1

TSDATA0~TSDATA7

TSVALID

TSSTRT

U119

PN202AT

Figure 3.1.7.1 DVB circuit block diagram

TSCLK

TSFALL/RESET

MT8606

Transport stream

Receiver

2.Block diagram of DVB receiving circuit is shown in igure 3.1.7.2:

- 22 -

NONIN

TUNER

IF_GAIN

TV+

TV-

SIOMAD

AGG

Feedback

Cirduit

MST718BU

IF1

IF2

TUNSDA_D1

TUNSCL_D1

STV8317F

PN2020AT

Section Two Troubleshooting flow chart

- 23 -

[ Flow chart 1 ] Trouble symptom: standby light is not on

Trouble description: connect with power, standby indicator light is not on, machine has no response

and buttons have no function.

Machine not power on

Whether

12V voltage

outputted by power

adapter is

normal

Check

whether J501 pin 2

12Vvoltage is

normal

Check

whether U503 pin 2

5V voltage is

normal

Check

the power supply

loop from +5VEXT power

toMST718 is

normal

Check

whether standby

control signal outputted

by MST718_57 is

normal

Check power adapter

Check flat cable from power adapter to video main board

Change U503

Check power supply loop

Check

whether reset

signal of MST718

is normal

Check reset system circuit

Check

whether Q117 is

normal

Check the standby indication circuit on subsidiary board

Check

whether X101 clock

signal is normal

Change MST718

Check clock system circuit

[ Flow chart 2 ] Symptom: power not on

- 24 -

Trouble description: test after machine power on, standby indicator light is not on and +12V power

outputted by power adapter is abnormal.

Power not on

Check fuse, TC1 and rectifying bridge

Check NCP1207 and peripheral elements

Change Q1

Check

whether power

board Cn2

has 12V voltage

Check according to troubleshooting process for“player not switch on”

Check

whether power

board TC1 has 310v

voltage

Check

whether each pin

voltage of U1 is

normal

Check

whether Q1 is

damaged

Check

whether 12v

resistor to ground

is normal

Check whether filtering

capacitor TC3/TC4 has

electric leakage and

short-circuit

Check

whether VD4

has secondary

voltage

Check

whether VD4

secondary voltage is

normal

Check feedback loop U2/U3

Check whether voltage of TC2 two ends

is normal

Change L3

Change transformer

whether transformer

is normal

Check VD4

Check

END

[ Flow chart 3 ] Symptom: no sound

- 25 -

Description: there is image, but no audio output.

All input source has

no sound output

Check

whether pin 34/36

of STV_8317 has signal

output

Check

whether power

supply of power amplifier

board TDA7266 is

normal

Check STV8317 and peripheral elements

Check power supply loop of TDA7266

Check

whether TDA7266_6

pin is high level

Check

whether audio output

pin waveform of

TDA7266P is

normal

Check speaker and line

Check mute control circuit

Change TDA7266P

[ Flow chart 4 ] Symptom: white screen

- 26 -

Description: screen is white and indicator on.

White screen

Check

whether u502_D

voltage is normal

Check

whether 2.5V

voltage of pin 2 of

U507 is normal

Check

whether 3.3V

voltage outputted

by U505 is

normal

Check

whether X101 clock

is normal

whether u502_G pin is

Change U502

Change U507

Change U505

Check X101/C103/C104

Check

low level

Check Q504 and peripheral elements

Check

whether U15_37

(PANEL_ON) is low

level

Check

whether Q505_C is

high level

Change MST718

Check Q505 and peripheral elements

Check

whether drive

output pin MST718

outputs normally

Check

whether the socket and flat cable from main board to display screen

are normal

Change display screen

Change MST718

Change flat cable or socket

+ 73 hidden pages

BBK LD1916DK Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual