BBK DV727SI User manual

service manual
DV727SI

Catalog
1.1 Safety precautions
1.1.1 Power supply
1.1.2 Precautions for antistatic
1.1.3 Precautions for laser head
1.1.4 About placement position
1.2 Maintenance method
1.2.1 Visualized method
1.2.2 Electric resistance method
1.2.3 Voltage method
1.2.4 Current method
1.2.5 Cutting method
1.2.6 Element substitution method
1.2.7 Comparison method
1.3 Required device for maintenance
Chapter Two Functions and Operation Instructions
2.1 Features
2.2 Control Button Locations and Explanations
2.2.1 Front Panel Illustration
2.2.2 Rear Panel Illustration
2.2.3 LED Display Window Illustration
2.2.4 Remote Control Illustration
2.3 Accessories
2.4 FUNCTION SETUP
2.4.1 Function Setup
2.4.2 Language
2.4.3 Image
2.4.4 Sound
2.4.5 Playback
Chapter One About Maintenance
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2.4.6 Karaoke
2.4.7 Preference
2.4.8 Parental control
2.4.9 Initial setup
2.4.10 Rest to defaults
2.4.11 Exit
2.5 Specifications
Chapter Three Principle and Servicing
Section One Principle of the Player
3.1.1 Function and features
3.1.2 Block diagram of the player
3.1.3 Introduction to IC used by this player
Section Two Unit Circuit Principle
3.2.1 Servo circuit
3.2.2 Audio/video output circuit
3.2.3 Mute circuit and power-off quieting circuit
3.2.4 Reset circuit
3.2.5 Power supply 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 MT1389HD
3.5.2 function introduction to AT24C02
3.5.3 function introduction to CS5340
3.5.4 function introduction to 74HCU04
3.5.5 function introduction to FLASH
3.5.6 function introduction to SDRAM
3.5.7 function introduction to 4580
3.5.8 function introduction to D5954
3.5.9 function introduction to Pt6961
3.5.10 function introduction to VIPer22ADIP
3.5.11 function introduction to Ph817
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3.5.12 function introduction to LM431A
3.5.13 function introduction to 4558
3.5.14 function introduction to TDA1308
Chapter Four Disassembly and Assembly Process
Chapter Cinque PCB board & Circuit diagram
Section One PCB board
Section Two circuit diagram
Chapter six BOM List
3.5.14 function introduction to MT1392E
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Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Power supply
When maintenance personnel are repairing DVD players, he should pay special attention to the
power board with 220V 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 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.
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1.1.4 About placement position
1. Never place DVD player 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 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.
1.2.2 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.
1.2.3 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.
1.2.4 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.
1.2.5 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.
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1.2.6 Element substitution method
When some elements cannot be judged good or bad, substitution method may de adopted directly.
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
Digital oscillograph ( 100MHE)
TV set
SMD rework station
Multimeter
Soldering iron
Pointed-month pincers
Cutting nippers
Forceps
Electric screw driver
Terminals connecting cord
Headphone
Microphone
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Chapter Two
Functions and Operation Instructions
2.1 Features
This player has employed the new generation DV decode chip with built-in Dolby Digital decoder
which will bring you to a brand-new AV entertainment world. The 2-laser super error-correction
mechanism supports CD-R.
Brand-new AVEffects
#Compatible with DivX, MPEG4 discs to produce wonderful pictures.
#108MHz/12bit video DAC, with more vivid and brilliant pictures.
#Progressive-scan video outputs to eliminate the flickers hardly overcome by interlacing scan and
therefore your eyesight will be well-protected. At the same time, the pictures definition Is sharply
enhanced and the pictures will be finer, smoother and stabler
#Brightness, chroma and contrast adjustment functions to render your eyes more comfortable.
#Digital echo Karaoke to enable your singing easier.
#Composite Video, S-Video and Component Video outputs.
#Bullt-In Dolby Digital decoder, separate 5.1Ch Outputs.
#Dolby output for 2channel(DOWNMIX)
#DVD-Audio decoding output to reproduce original and realistic sound effects.
#Smoothly read SACD.
High Quality Digital Audio
#Optical and coaxial outputs for Digital audio.
#DTS, Dobly Digital, PCM Digital audio outputs to satisfy the Fans’S acoustic requirements.
Many Convenient Features
#Screen saver protects your TV set carefully.
#The novel Mp3 playback window GUI provides you a new way to appreciate Mp3 music.
#Multi-angle playback function makes it possible for you to view a scene from different camera angles.
#It’s possible to select the desired beginning, development and ending of a story.
#Direct entry into desired scenes(title/chapter/track search).
#Zooming function to zoom up any playing picture.
#Capable of playing PAL/NTSC discs.
#Multiple aspect ratios to fit TV sets of various screen ratios.
#Parental lock function to prevent children from watching unsuitable discs.
#Multiple dubbing languages and subtitle languages bring you the best entertainment status all the time.
Super Compatibility with super VCD, VCD, CD , CD-R , MP3,HDCD, KODAK PICTURE CD etc.
NOTE: DivX version is still upgrading continuously and the latest version of this unit is DivX 5.1.
Some discs labelled with MPEG4 on the market actually are others, with which are incompatible .
Please take care when buying discs.
#Compatible with USB equipment, capable of reading the audio/video data in the USB through USB
port.
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2.2 Control Button Locations and Explanations
2.2.1 Front Panel Illustration
Headphone Jack
MIC Jack
POWER switch
IR SENSOR
Display window
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Power indicator
Disc tray
OPEN/CLOSE button
PLAY button
STOP button
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Push button
PREV button
PAUSE button
NEXT button
Slot flap for USB
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2.2.2 Rear Panel Illustration
HDMI Out jack
Mixed Audio out jack
5.1CH Audio Out jack
Video Out jack
S-Video
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Video Component /Y Pb Pr out jacks
Digital Audio Coaxial Out jack
Digital Audio Optical Out jack
SCART out jack
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2.2.3 LED Display Window Illustration
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Play
Playback time
DVD disc
Pause
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CD disc
Mp3 disc
VCD disc
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2.2.4 Remote Control Illustration
Button
Open or close the disc tray.
LANG Button
Change the audio language or audio channel.
MEMORY Button
Save the playing point or jump to the saved point .
DISP Button
Display or hide disc information.
NUMBER Buttons
BROWSE Buttons
switch new user interface.
CURSOR Buttons
SETUP Button
Function Setup.
Button
Open/close the virtual keyboard function.
KARAOKE Button
Karaoke operation menu.
Button
Fast backward play.
Button
Skip backward.
PEPEAT Button
Repeat play.
A-B Button
Repeat the select.
Button
Press once to stand by, Press twice to play.
SUBT Button
Change subtitle language, Switch JPEG display mode.
HDMI Button
Switch output mode of HDMI.
Q-PLAY Button
Skip the advertisement/warning and play the DVD
directly.
MENU Button
Display DVD menu or open/close PBC.
OK Button
Cancel Button
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ZOOM Button
Zoom in/out the displayed frame.
Button
Play or pause playback.
Button
Fast backward play.
Button
Stop playback.
Button
Skip forward.
USB DVD Button
VOL +/- Button
Increase/decrease volume level.
MUTE Button
Press once to mute, twice to unmate.
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