BBK LD1506DK User manual

Service Manual
LD1506DK(RU)
Model version:S40QV2.00 V2.10
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LD1506DK

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
2.1.5TV mode
2.1 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
2.1.6 PC monitor mode
2.2 Section Two DVD Segment
2.2.1 Controls and functions
2.2.2 Function settings
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2.2.3 Others
Chapter Three Principle and Servicing
The previous manual: TV part
Section One Principle of the player
3.1.1 System control principle
3.1.5 Power circuit
3.1.6 Video circuit
Section Two
Section Three
The next manual: DVD part
Section One Principle of the player
3.1.2 Video circuit
3.1.3 Servo circuit
3.1.4 USB/CARD circuit
3.1.5 Decode circuit
Section Three
Section One PCB Board
3.1.2
3.1.4 Audio circuit
Troubleshooting flow chart
Waveform diagram
3.1.1 Audio circuit
Section Two Troubleshooting flow chart
Waveform diagram
Chapter Cinque PCB board & Circuit diagram
Section Two Circuit diagram
Chapter Six BOM List
Overall wiring diagram
3.1.3 Block diagram of the player
Chapter Four Block Diagram of Play Disassemblyand Explosion
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3.1.7Block diagram of DVB 21

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.
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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.

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
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2.1.1 Features
Technical Features
#High quality color TFT panel(15 inch for LD1506DK, 19 inch for LD1906DK )
#Maximum resolution 1024X768 for LD1506DK,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
#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.
Chapter Two
Functions and Operation Instructions
2.1 Section One TV SEGMENT
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2.1.2 Set list
LCD TV
Remote Control
AAA Battery
Power Adapter
Power Cord
RCA-RCA cord
2XRCA-2XRCA cord
Microphone
Microphone cable
Wall Mount Holder
Kickstand
Screw M5X15
Screw M4X10
Screw PA5X25
Screw PM4X10
Expandable pipe
User manual
Warranty Card
Karaoke disc
1pcs
1pcs
2pcs
1pcs
1pcs
1pcs
1pcs
2pcs
2pcs
1pcs
1pcs
1pcs
1pcs
4pcs
4pcs
4pcs
1pcs
1pcs
1pcs
(1) Panel controls and indication
SETUP button
Press to switch to setup mode
_VOL+button
Press to adjust the volume.
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Left panel _CH+button
Press to switch between channels/to
choose menu item.
SOURCE button
Press to choose the playback mode.
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2.1.3 CONTROLS AND FUNCTIONS
For LD1506DK
For LD1906DK

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STANDBY button
Press to switch on the device/into
standby mode.
POWER button
Turn on/off the power.
Headphones output
Microphone input 1
Microphone input 2
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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.
Remote control sensor
Power supply indicator
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Front panel
Right panel
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(2) Remote control general view
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.
Button
Press to turn on/off the sound.
VOLUME+/-button
Press to adjust the volume.
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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.
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SELECT RETURN SETUP
ENTER
(1 )Switching interfaces
2.1.4 CONNECTION AND
STARTING
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4Y 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
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.
TV MODE
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1RF 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.
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For LD1506DK and LD1906DK
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