BBK DV718SI Service Manual

DV718SI

service manual

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 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

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 Functions and features

3.1.2 Block diagram of the player

3.1.3 Introduction to IC of the player

Section Two Unit Circuit Principle

3.2.1 Introduction to laser head

3.2.2 Servo circuit

3.2.3 CD/DVD conversion circuit

3.2.4 Laser power control circuit

3.2.5 Open/close door drive circuit

3.2.6 Main axis control circuit

3.2.7 Decode circuit

3.2.8 Video circuit

3.2.9 Reset circuit

3.2.10 Audio circuit

3.2.11 Mute circuit

3.2.12 Power circuit

3.1.13 USB jack circuit

3.2.14 AV output board circuit

3.2.15 Panel control circuit

3.2.16 HDMI 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 P H817

3.5.12 function introduction to LM431A

3.5.13 Function introduction to 455 8

3.5.14 Function introduction to TDA1308

3.5.15 Function introduction to MT1392E

Chapter Four Disassembly and Assembly Process

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

Chapter six BOM List

106

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.

- 1 -

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.

- 2 -

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

- 3 -

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 willbring you to a brand-new AV entertainments world. The 2-laser super error-correction mechanism supports CD-R.

Brand-new AV Effects #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.

High Quality Digital Audio #Optical and coaxial outputs for Digital audio. #DTS,Dobly Digital, PCM Digital audio outputs to satisfy the fans’ss 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 uncompatible . Please take care when buying discs.

- 4 -

2.2 Control Button Locations and Explanations

2.2.1 Front Panel Illustration

4 5

7 8

Slot flap for USB

MIC jack

Headphone jack

POWER switch

Disc tray

2.2.2 Rear Panel Illustration

Mixed Audio out jack

5.1CH Audio Out jack

S-Video

Video Out jack

HDMI Out jack

IR SENSOR

Display window

OPEN/CLOSE button

PLAY/PAUSE button

STOP button

42 3

5 6

8 9

Video Component /Y Pb Pr out jacks

Digital Audio Coaxial Out jack

Digital Audio Optical Out jack

SCART out jack

2.2.3 LED Display Window Illustration

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 .

Playback time

- 5 -

DISP Button

Display or hide disc information.

NUMBER Buttons

BROWSE Buttons

switch new user interface.

CURSOR Buttons

12 13 14

ETUP Button

2 3 4

15 16

17 18

Function Setup.

[ ]

Button

Open/close the virtual keyboard function.

KARAOKE Button

Karaoke operation menu.

8 9

[ ]

Button

Fast backward play.

[ ]

Button

Skip backward.

PEPEAT Button

23 24 25

USB DVD

Repeat play.

A-B Button

Repeat the select.

[ ]

Button

[ ]

Button

Stop playback.

[ ]

Button

Skip forward.

USB DVD Button

VOL +/- Button

Increase/decrease volume level.

MUTE Button

Press once to mute, twice to unmate.

Press once to stand by, Press twice to play.

SUBT Button

Change subtitle language.

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

ZOOM Button

Zoom in/out the displayed frame.

[ ]

Button

Play or pause playback.

[ ]

Button

Fast backward play.

2.3 Accessories

AUDIO/VIDEO CORD REMOTE CONTROL AAA SIZE BATTERIES WARRANTY CARD USER MANUAL KARAOKE DISC

2.4 FUNCTION SETUP

2.4.1 Function Setup

1PCS 1PCS 2PCS 1PCS 1PCS 1PCS

- 6 -

1.Press the [SETUP] button and the screen

displays the selection menu of function setup.

Language

Image

Sound

Playback

Karaoke

Preference

Parental control

Initial setup

Reset to defaults

Exit

Setup menu

DVD menu

Soundtrack

Subtitle

Off

2.Press the [CURSOR] button to select the menu

to be entered and press the [OK] or button to confirm. Or press the [CURSOR] button to Exit item and then press the [OK] button to exit .

3.Press [UP/DOWN] arrow to select the desired

item you want to set and press [OK].

For example, press [UP/DOWN] arrows to select IMAGE and press [OK]. The Image setting page appears on the screen.

16:9

Off

AUTO

PAL

NTSC

TV system

TV scan mode

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

Com.

4.Press [UP/DOWN] arrow to select the

SHARPNESS item. Press [OK] to confirm it. And then press [UP/DOWN] arrow to select the desired valus.For example: Press[ UP/DOWN] arrow to select “Medium” ,then press [OK], the TV screen display.

TV system

TV scan mode

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

Com.

16:9

Off

High

Medium

Low

5. Press [LEFT] button if you want to return to

the previous setup page.

6.Press [SETUP ]to exit the setup menu.

2.4.2 Language

Setup menu

DVD menu

Soundtrack

Sbutitles Off

Russian

English

Ukrainian

1.Setup menu: This item is used to set the prompts language on the screen.

#Optional setting: Russian, English, Ukrainian. #Default: English.

2.DVD menu: To set the preference disc menu lang when playing.

#Optional setting:

Russian, English, Estonian, Latvian, Kazakh, Romanian, Byelorussian, Ukrainian, Chinese, Others.

#Default: English.

3.Sountrack:To set the preference audio language when playing.

#Optional setting:

Russian, English, Estonian, Latvian, Kazakh, Romanian, Byelorussian, Ukrainian, Chinese, Others.

#Default: English.

4.Subtitles: To set the preference subtitle language when playing.

#Optional setting: Off,

Russian, English, Estonian,Latvian, Kazakh, Romanian, Byelorussian, Ukrainian, Chinese, Others.

#Default: Off.

2.4.3 Image

TV system

TV scan mode

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

Com.

1.TV system: This item is used to the video output system of this unit.

#Optional setting: Auto, PAL, NTSC. #Default: AUTO.

2.TV scan mode: To set

Interlaced scan mode

#Optional settings: Progressive , Interlaced. #Default: Interlaced.

3.Video output: To set the types of SCART out connector.

#Optional setting: Component , SCART. #Default: Component. #When using RGB outputs from the SCART

interface,please select RGB. Other wise , please select Com-ponent.

AUTO

PAL

NTSC

16:9

Off

Progressive scan,

- 7 -

4.TV format: To set the aspect ratio of this player’s output image.

#Optional setting: 4:3 Pan-scan, 16:9 letterb.,

16:9 TV, Wide/SQZ.

#Default: 16:9 TV.

5.Sharpness:Used to set the sharpness of video outputs.

#Optional setting: High, Medium, Low. #Default: Medium.

6.Gamma emendation:This item is used to setup the Gamma value of video output.

#Optional setting: High, Medium, Low, Off. #Default: Off.

7.Brightness:Used to set the brightness of video outputs.

8.Contrast:Used to set the contrast of video outputs.

9.Hue: Used to set the hue of video outputs.

Saturation: Used to set the saturation of video

10.

outputs.

#Brightness, contrast, hue and saturation

adjusting means:

Press [UP/DOWN] arrow in the video setup

menu to select the desired item you want to adjust. Press [OK] or [RIGHT] button to enter the item's adju-stment.

Press [UP/DOWN] arrow to adjust the setting

value.

2.4.4 Sound

Mixer...

Digital output

HDMI Audio On

Tuning

1.Mixer...

Configuration

Stereo mix

Surr. Mix

Low band

Channels

Delays

PRO Logic II

A. Configuration: To set this player’s DOWNMIX

mode to change multi-channel audio into two channel audio.

#Optional setting: Stereo, 5.1. #Default: Stereo. B. Stereo mix: To set the output means of the left

or right audio when playing a Dolby disc with separate two-channel audio.

Configuration

Stereo mix

Surr. Mix

Low band

Channels

Delays

PRO Logic II

St.

L+R

sum

FSW.

AUTO

St.

L+R

sum

FSW

Off

Stereo

5.1

#Optional setting: L+R, L, R. #Default: L+R. C.Surr. Mix: To set output means of the surround

left and right audio when playing a stereo disc. #Optional setting: Off, sum, Virt.Surr. #Default: Off. D.Low band: select the channel that you desire

to output low frequency signal. #Optional setting: Front F, Center C, Surround Sr,

Subwoofer SW. #Default: Front F, Subwoofer SW. E.Channels: To set volume of each individual

channel. a. Press [UP/DOWN] navigation keys to select

CHANNEL TRIM, then press the [OK] or

[RIGHT]navigation key to select ENTER

SETUP PAGE as shown in the TV screen:

FRONT

Volume L

surround

R l r Center SW

16 16 16 16 16 16

b.Press [LEFT/RIGHT] navigation keys to select

the desired channel to adjust. c. Press [UP/DOWN] navigation keys to raise or

lower volume of the channel. d. Press [OK] or [LEFT] to return to the Mix..

setup page.

F. Delays: To set delay time of the Center/

Surround/ Subwoofer Speaker. A. Press [UP/DOWN] navigation keys to select

Delays in Channels item, then press [OK] or

[RIGHT] navigation key select ENTER SETUP

PAGE as shown in the TV screen.

Subwoofer

Center

LS/RS

0cm

180cm

b.Press [UP/DOWN] navigation keys to Select

the desired item oup Press [OK] or [RIGHT]

button to enter setting. c. Press [UP/DOWN] navigation keys to raise or

lower volume. D.Press [OK] or [LEFT] to return to the Delays in

channels setting page.

- 8 -

G. PRO Logic II: To set PRO Logic II to ON or

OFF. If the TITLE does not support this function, we recommend that you set this item to AUTO because it would become worse if the

processing effects were added forcibly. #Optional setting: AUTO, On, Off . #Default: AUTO.

2. Digital output: select to set the format and

stream form of digital audio output. A. SPDIF format:3Optional setting: RAW format,

SPDIF/PCM. #Default: RAW format. B. LPCM #Optional setting: 48 kHz 16bit , 96 Khz 24bit,

192kHz 24bit #Default: 48 kHz 16bit.

NOTE

If HDMI Audio is set in ON, this item is not

adjustable.

3. HDMI Audio: This item is to set whether

the HDMI Audio output is allowed. #Optional settings: SPDIF Multi Channel off. #Default: Multi.

4. Tuning: A. Max volume: set the maximum volume. B.Equalizer: To set Equalizer modes. #Optional setting: Off, Rock, Pop, Live, Dance,

Techno, Classic, Soft. #Default: Off. C. Echo: To set different sound field effects. #Optional setting: Off, Concert, Living room, Hall,

Bathroom, Cave, Arena, Church. #Default: Off. D.Tone balance

: to set the tone level to match

your diapason when you're singing #Method to adjust tone control: a.Press [UP/ DOWN] cursor buttons to select

"tone" item in Audio Setting page, and then

press [OK] or [RIGHT] button to enter

Adjustment Menu. b. Press [UP/DOWN] cursor button to adjust

setting value. c. Press [OK] or [LEFT] button to return to Audio

Setting page after adjustments are done.

2.4.5 Playback

DVD

VCD/SVCD

Files

Repeat

1. DVD:set whether information of advertisement

and warnings at the beginning of DVD disc is

Advertisemenu No

A. P. V

Off

skipped to play the movie directly.

Advertisemenu #Optional setting: Yes, NO #Default: Number

2.VCD/SVCD: To set the PBC status. #When playing Super VCD or VCD2.0 discs, if

the PCB is ON, the menu image displays. #Optional setting: On, Off. #Default: On.

3.Files:data disc may probably includes Mp3,

JPEG and MPG format files in which you may

select DVD player to read the file type. #Optional setting: Audio, Picture, Video. #Default: Audio, Picture, Video.

4. Repeat : select the repeat playback mode. #Optional setting: Off, Single, all. #Default: Off.

2.4.6 Karaoke

Microphone

Kar. help

Volume

Echo

No ast.

1.Microphone: switch on or off microphone. #Optional setting: On, Off. #Default: Off.

2.Kar. help: select accompany singing means. #Optional setting: Channels L, Channels R,

Channels No ast, Channels No voc. #Default: Channels No ast.

3.Volume: A.In microphone setup page, press [UP/DOWN]

cursor to select “Volume” item, and then press

[OK] button to enter the adjustment menu. B.Press [UP/DOWN] cursor to adjust the setup

value. C.After adjustment finishes, press [OK] button

to return to microphone setup page.

Microphone

Kar. help

Volume

Echo

4.Echo: A.In microphone setup page, press [UP/DOWN]

cursor to select “Echo” item, and then press

[OK] button to enter the adjustment menu. B.Press [UP/DOWN] cursor to adjust the setup

value. C.After the adjustment finishes, press [OK]

button to return to microphone setup page.

Off

No ast

- 9 -

Microphone

Playerable discs

Inputs

Outputs Audio outputs

DVD-Video, Super VCD, VCD, DivX 3.11, DivX 4,DivX 5, Divx Pro, XviD, CD-DA, CD+G, DVD-Audio,HDCD, MP3, WMA, Kodak Picture CD, JPEG

MIC input

Analog audio output: Stereo, output 5.1CH Digital audio output: Coaxial,Opcical

Kar. help

Volume

Echo

2.4.7 Preference

Backlight

Gr. equalizer

Screen saver

Off

No ast.

Off

#Default: 7890.

Old password

New password

Verify

Cancel

2.4.9 Initial setup

1.Backlight:This item is used set color of led on the front panel.

#Optional setting: On, Off. #Default: On.

2.Gr. equalizer: This item is used to set wether the Dynamic Spectrum is allowed.

#Optional setting: On, Off. #Default: Off. #Dynamic Spectrum display is invalid in Data

disc DVD AUDIO playback.

3.Screen saver: Open or close the screen saver function.

#Optional setting: On, Off. #Default: On.

2.4.8 Parental control

any

Kid

Allowed..

Set password

Any

1.Allowed..: To set the parental control ratings to prevent children from watching the restricted contents.( In case the disc supports this function.)

#Optional setting: any, Kid, G, PG, PG-13, PGR,

R ,NC-17.

#Default: any.

2.Set password: To set four digit password to enable you to change the parental control ratings.

PG-13

PGR

NC-17

Auto

PAL

NTSC

Press [UP/DOWN] arrow to select the desired option and Press [OK] button to confirm it.

NOTE

In this setup state, you may not press [LEFT] button to return to the previous menu.

2.4.10 Rest to defaults

Load factory settings

OK Cancel

Reset to defaults: To restore all settings to the default value except for the parental control and password settings.

2.4.11 Exit

Language

Image

Sound

Playback

Karaoke

Preference

Parental control

Initial setup

Reset to defaults

Exit

Press [UP/DOWN] arrow to select the Exit item. Press [OK] button to exit the setup menu.

2.5 Specifications

- 10 -

Playerable discs

Inputs

Outputs Audio outputs

Video outputs

Video Characteristics

Audio characteristions

Operating voltage

Power consumption

General Specifications

Operating Temperature

Operating Humidity

15~75%(no condensation)

DVD-Video, Super VCD, VCD, DivX 3.11, DivX 4,DivX 5, Divx Pro, XviD, CD-DA, CD+G, DVD-Audio,HDCD, MP3, WMA, Kodak Picture CD, JPEG

MIC input

Video amplitude 1.0Vp-p(75 ) S-Video amplitude Y:1.0Vp-p(75 ) C:0.286Vp-p(75 ) Component Video amplitude Y:1.0Vp-p(75 ) Cb/Cr:0.7Vp-p(75 )

Frequency response 20~20KHz(±1 dB) Slgnal-to-noise ratio >100(dB) THD <0.01%

Dimensions: 380mm 250mm 41.5mm Mass: 1.86kg

~110V-250V, 50/60 Hz

14W

5~35

Analog audio output: Stereo, output 5.1CH Digital audio output: Coaxial,Opcical

Composite, S-Video, component Y Cb Cr, progressive scan output Y Pb Pr, RGB/SCART

Headphones output

Outputs

#Design and specifications are subject to change without notice.

Play erable disc s

Input

Audio outputs

Video outputs

Video Characteris tic s

Audio c haracteri st ions

Operating voltage

Output

Analog audio out put: S tereo, out put 5.1CH Digital audio output : Coaxi al, Opt ical

Composit e, S-V ideo, c omponent Y Cb Cr, progress ive scan output Y Pb Pr, RGB/SCART

Headphones output

DVD-Video, Super V CD, V CD, DivX 3.11, Di vX 4,Di vX 5, Di vx Pro, XviD, CD-DA , CD+G, HDCD, MP 3, W MA, Kodak Pic ture, JPEG

MIC input

Video ampl itude 1. 0Vp-p(75 ) S-Video amplit ude Y:1. 0Vp-p(75 ), C:0. 286Vp-p(75 ) Component Video amplitude Y: 1.0Vp-p(75 ), Cb/Cr:0. 7Vp-p(75 )

Frequency respons e 20~20KHz (±1 dB) Slgnal-t o-noise rat io >100(dB ) THD <0.01%

~110-250V, 50/60Hz

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

and recording format.

- 11 -

#Design and specifications are subject to change without notice.

Power cons umpti on

General Spec ificat ions

Operating Temperature

Operating Humi dity

5~35

15~75%(no c ondensat ion)

Dimensi ons: 380mm 258mm 41.5mm Mass: 2kg

14W

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

and recording format.

- 12 -

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Functions and features

This player adopts new generation DVD decode chip, with built-in Dolby decoder, which creates

vivid surround sound effect to bring you to taste cinema effect. It has the following features:

Progressive scanning output produces steadier and clearer pictures with flickering.

HDMI jack.

5.1CH output.

Composite video, S-video and component video output.

Digital picture adjustment to the sharpness, brightness, contrast, chroma and saturation os

picture, gamma correction.

Built-in Dolby digital decoder.

Karaoke function.

Headphone output function.

USB jack.

Compatible with DIVX, MPEG4 format movie.

3.1.2 Block diagram of the player

Its internal structure is mainly composed of decode & servo board, HDMI high definition board,

input/output board, power board and loader components. Block diagram of the player is shown in the

figure 3.1.2.1, except for power board, other signal flow are all shown in the figure. Main function of

loader is to read disc information and transmit to Mt1389, Mt1389 fulfills servo function through D5954

on decode board and other subsidiary circuit to ensure the normal working of loader. FLASH on decode

board is to save system program, SDRAM is to save program when machine is working and read sound

and picture information from disc to ensure smooth output. Main function of AV board is to output various

video signals.

- 13 -

Earphone

USB

Panel

SDRAM 64M

U211

FLASH16M

U214

CS5340

U203

MIC

TX 0TX 0+

TX 1-

TX 1+ TX 2TX 2+ TXCTXC+

HPD

Audio amplifying audio

U209 U210 U211

Video filtering clamping

VR-DVD

VR-CD

CD/DVD

Switch

IOA

AR ALS

ARS SW

Loader

VR-DVD VR-CD

Laser power

control

MDI

LDO2 LDO1

DVD:A/B/C/D/RFO

CD:A/B/C/D/E/F

V20

TRIN

TROUT

LIMIT

Mt1389HD

U201

HPD HDMI SCL#

HDMI SDA#

TK+ TK- FC+ FC-

INT0#

PWDN#

SL+

SL-

SP+

SP-

U302

AM5888S

LOUD+

LOUD-

TR_B1

REG01

TR_B2

REG02

VIP4

STBY

FOSO

FMSO

DMSO

TRSO

TROPEN

TRCLOSE

Voltage reduce circuit

VCC

3.3V

VCC

1.8V

IOA

27M cock

SCL

EEPROM

U202

SDA

24C02

SLRCK

SBCLK

SACLK

SDATA0

SDATA1 SDATA2 SDATA3

ASPDIF

UREST

Reset

CTR

ASPDIF

YUV1 YUV2 YUV3 YUV4 YUV5 YUV6

SCL SDA

Y1 Y2 Y3

Y4 Y5

Y6 Y7

MT 1392

Rt SL SR

LFE

SY SC

CVBS

G/Y B/U R/V

AV output terminal

- 14 -

Figure 3.1.2.1 Block diagram of the player

HDMI jack

3.1.3 Introduction to IC of the player

PCB semi-finished

product name

IC model Location Function

MT1389HD U201 Decode chip

24C02 U202 EEPROM

CS5340 U203

HCU04 U205 Phase inverter

FLA SH U207 16M FLASH

SDRA M U208 64M SDRAM

4580 U209, U210, U211 Operational amplifier (audio amplifying)

D5954 U302 Servo driv e

PT6961 U401 Panel control IC

HS0038B3V U402 Remote control rec eiver

V IPER2 2 U501 Power sw itch IC

PH817 U502 Photoelectric coupler

LM431A U503 Precision voltage stabilizer

4558 U601 Operational amplifier (audio amplifying)

TDA1308 U603

Operational amplifier (headphone audio

amplify ing)

MT1392E U701 HDMI control

TVS_RCLAMP0514M U703, U704

MIC board

High definition

board

Main panel

Power board

Decode board

Introduction to IC of the player is shown as in the following table:

- 15 -

Section Two Unit Circuit Principle

Pin Name

Signal flow

direction

DVD disc CD disc No disc Function description

1 F- Input loader 2.52 2.34 0.46

2 F+ Input loader 2.49 2.49 0.93

3 T+ Input loader 2.53 2.51 0.94

4 T- Input loader 2.58 2.51 0.93

5 C Input MT1389 2.2 2.25 2.04 Disc data signal

6 D Input MT1389 2.2 3.2 2.04 Disc data signal

7 IOA Input MT1389 0.01 3.2 3.21

Disc identification signal, CD is 3.3V, DVD

is 0V

8 RF Input MT1389 2.21 2.53 1.28 The sum of disc data signal

9 A Input MT1389 2.17 2.22 2.04 Disc data signal

10 B Input MT1389 2.19 2.27 2.04 Disc data signal

11 F Input MT1389 2.07 2.44 2.03 Supplementary signal used in trace

12 GND Ground 0.01 0.01 0 Grounding

13 V20 Input loader 2.04 2.06 2.03 Reference voltage

14 Vcc Input loader 5.04 5.04 5.02 Supply voltage for loader

15 E Input MT1389 2.06 2.45 2.03 Disc data signal

16 Blanking haning in air 0.01 0 0 unused

17 VR-CD Input loader 0.21 0.01 0

Through the handling inside loader, make

sure MD11 is 180mV when reading CD

18 VR-DVD Input loader 0.01 0.2 0

Through the handling inside loader, make

sure MD11 is 180mV when reading DVD

19 LD-CD Input loader 0.09 2.1 0 CD laser power control signal

20 MDII Input MT1389 0.21 0.2 0 CD and DVD laser power monitoring signal

21 HFM Input loader 5.04 5.04 5.02

High frequency overlapping signal produces

laser with different wave length inside

loader

Focus error signal is added to two sides of

pick-up focus coil

Trace error signal is added to two sides of

pick-up trace coil

3.2.1 Introduction to laser head

1. Function introduction to laser head flat cable is shown as the following table:

- 16 -

Note: 1. When reading DVD, there are only A, B, C, D signals.

22 Blanking unused 0.01 0.1 0

23 LD-DVD Input loader 2.21 0.1 0 DVD laser power control signal

24 GND unused 0.01 0.01 0 Grounding

2. When reading CD, there are A, B, C, D, E, F signals.

3. RFO=A+B+C+D.

4. Focus error signal=(A+C)-(B+D) Trace error signal=E-F.

2. Working principle

(1) Laser tube: wave length of loader DVD laser diode is 650nm, wave length of CD laser diode is

790nm, the wave length which is within 370nm and 750nm is visible light, the laser in the course of

reading DVD disc is visible light, and that when reading CD disc is infrared light.

(2) Principle about laser head picks up signal: laser beam projects onto disc, when laser beam

focus projects onto disc vertically, laser beam will produce reflection, reach on light sensor through

reflection loop and converse into electronic signal through photoelectric cell. For the reflection loop

produced in non pit information area and pit information area in disc has difference and reflects into

different position of light sensor, photoelectric diode in different positions on light sensor will produce

different signals to process all signals on light sensor and then produce digital signals.

(3) Focus, trace coil: when laser head is reading signals normally, information side should be in the

focus of laser beam, because of factors of disc error, high speed rotation and machine error, it is

unavoidable that laser beam focus deviates from information face to produce phenomena of orbit boas

and refocusing. Focus , trace coil is added on loader to adjust laser beam to make it correctly focus in

information area.

(4) Formation of RF signal: when disc reading is normal, light sensor will have 160MV, vague and

eye pattern waveform which is added on A, B, C, D respectively, and output RF signal from FRO pin

after being overlapped by adder inside light sensor, the frequency when reading DVD disc is much

higher than that when reading CD disc, output amplitude is about 1.4V.

3.2.2 Servo circuit

1. Servo system of this player adopts SANYO 65 loader and MTK decode solution

(MT1389HD+FLASH (16M) +SDRAM (64M)), and its servo circuit is mainly composed of front end signal

processing, digital signal processing and digital servo processing, digital signal processing IC Mt1389

and drive circuit Am58888, in which Mt1389 is also the main part of decode circuit. Servo circuit block

diagram is shown in the figure

3.2.2.1:

- 17 -

XS101

Switch circuit

APC circuit

A B C D E F RFO

IOA

MD11 LDO2 LDO2

FOSO

FMSO

TRSO

DMSO

Open/close circuit

MT1389

Feed electric machine

Main axis electric machine

Main axis control detect circuit

TK-

TK+

FC+

FC-

SL+

SL-

SP-

SP+

AM5888

Figure 3.2.2.1 Servo circuit block diagram

2. Working principle: after power on or close to proper position, loader laser head begins to reset;

after laser head reaches proper position, detect switch will give a signal to Mt1389, Mt1389 begins to

output focus, main axis and light emission signals, machine begins to rotate, laser head begins to

identify disc information and decide whether disc is CD or DVD according to disc information to facilitate

to output level from IOA pin to make disc switch circuit and laser head PD IC make the relevant control

action. At the same time, Mt1389 adjusts laser output power through laser power control circuit.

After loader reading disc information, A, B, C, D, E, F signals are formed through photo-electric

conversion and sent out to Mt1389 (DVD only has A, B, C, D signals), and then inputted from pin 2~11,

18, 19 of MT1389. After being amplified and processed by the pre-amplifier inside MT1389, now signals

are separated to two part s for processing inside Mt1389. One part, through addition inside Mt1389 and

amplifying and subtraction circuit, produces servo error signal, after being processed by digital servo

signal circuit, corresponding servo control signals form to output FOO, TRO, DMO, FMO digital

servoControl signals from pin 42, pin 41, pin 37, pin 38 of Mt1389 respectively, and FOSO, TRSO,

DMSO, FMSO, through integration circuit composed by resistor capacitor, and send to servo driver

circuit for amplification to bring along focus winding, trace winding, main axis electric machine and feed

electric machine after drive amplification. Among these, focus and trace servo are used to correct

objective position accurately; feed servo is used to bring along laser head to make radial large-scale

move which belongs to the preliminary adjustment to laser head position; and main axis servo is used to

control main axis electric machine to make it read signals in means of constant linear velocity and

bringAlong disc to rotate. After processing of amplification by VGA voltage control amplifier and

- 18 -

equalization Frequency compensation inside MT1389, another part of signals are changed into digital

signals through internal A/D converter. When loader is reading CD/VCD signals, these signals are

conducted EFM demodulation inside MT1389, and then outputted to latter stage for AV decoding after

finishing CIRC (Cross-Interleaved Reed-Solomon Code) error correction inside. When loader is reading

DVD signals, these signals are conducted ESM demodulation inside MT1389, and then sent to latter

stage for decoding after finishing RSPC error correction inside. Normal DVD player has a open/close

circuit to control the in and out of door to reach the purpose of coneying discs; PDVD adopts manual

open means and whether it is close to proper position can be checked by detect switch.

3. Explanation to servo terms

(1) FOO: when rotating, disc may probably move upwards or downwards slightly to make the focus

of laser emitted by laser head cannot justly fall on data pit of disc, so laser head is required to move

upwards or downwards to make focus aim at data pit justly. When laser head is moving upwards or

downwards, it means that pick-up is making focus acts.

(2) TRO: data information is saved in disc in form of tracks. When disc is rotating, trace deviation

will produce and now laser head is required to be adjusted. In this process, it is objective, but the entire

pick-up, that moves forwards or backwards, and the moving range is very small.

(3) FMO: similar to acts of trace, the acts of feed are larger than those of trace. Feed conducts a

large scale movement firstly, and then trace moves slightly in this range. Feed moves for a while, and

does not move for another while; but trace moves all the time. Feed is rough adjustment and trace is fine

and acts are obvious when pwer on and selecting tracks.

(4) DMO: it is the top that holds up disc. Its rotation speed decides that of disc. Its rotation is

generated by an individual DC electric machine, in which rotation speed of DVD is twice over that of CD.

3.2.3 CD/DVD conversion circuit

1. CD/DVD conversion circuit is shown as in the following figure 3.2.3.1:

AVCC

Q305 3904-S

R309

10K R311

10K

IOA

MT1389E

R308

100K

XS301

R310

Q303

2SK3018-S

Figure 3.2.3.1 CD/DVD conversion circuit diagram

Q304

2SK3018-S

- 19 -

100K

2. Working principle

Base

electrode B

Collector C Em itte r E

Grid

electrode G

Drain

electrode D

Source

electrode S

G D S IOA

DVD disc 0 3.86 0 3.81 0.18 0 0 0 0 0

VCD disc 0.64 0.1 0 0 0 0 3.27 0.18 0 3.3

State

Q305 Q303 Q304

After loading disc in the player, IOA port of MT1389 is defaulted high level to make Q305 saturation

on and form loop together with CD laser power control circuit on CD. At the same time, IOA also goes to

loader PD IC to switch, disc begins to rotate, when servo management system recognizes that the disc

in player is not CD disc, IQA pin outputs low level to make Q305 cut off and make Q303 on, and form

loop together with DVD laser power control circuit on loader to perform disc reading acts. After disc tray

door opens, IOA keeps the state before opening disc tray door. If the player cannot recognize which disc

it is, IQA pin will switch continuously until reading disc or system judges that there is no disc.

Note: Q303 and Q304 are MOS tube

3. Key point voltage (unit: V) is shown as the following table:

3.2.4 Laser power control circuit

1. Laser power control circuit is shown as in the following figure 3.2.4.1:

LDO-AV33

R301

XS301

MD1

Figure 3.2.4.1 Laser power control circuit diagram

4.7R

2SB1132-S

4.7R

Q301

Q302

2SB1132-S

R302

LDO-AV33

TC302 47uF/16V

LDO2

20/21

MT1389E

LDO1

TC303 47uF/16V

2. Working principle:Pin 20/21 of MT1389 is laser power detect signal input pin, pin 21 is DVD laser

power strong/weak detect signal input pin, pin 23 is VCD laser power drive control output pin, pin 22 is

DVD laser power drive control output pin.

- 20 -

When reading VCD disc, laser power becomes weak, voltage of MDII pin decreases, voltage

Location number Read DVD disc Read VCD disc Location number Read DVD disc Read VCD disc

V103_E 2.9V 3.2V V104_B 3.2V 2.2V

V103_B 2.2V 3.2V V104_E 3.2V 2.9V

V103_C 2.2V 0 MT 1389_20 0.2V 0.2V

V104_C 0 2.2V

decrease of pin 23 of MT1389 makes voltage of pin 19 of XS301 increase to reach the purpose of raising

laser power. When laser power is too strong, voltage of MDII pin increases to lead to voltage of pin 23 of

MT1389 increase to make voltage of pin 19 of XS301 decrease to reach the purpose of reducing laser

power to form an auto power control circuit.

When reading DVD disc, pin 21 is detect signal input pin, pin 22 is drive control input pin, and the

working principle is the same with that when playing VCD disc.

3. Key point voltage (unit: V) is shown as the following table:

3.2.5 Open/close door drive circuit

1. Open/close door drive circuit is shown in the figure 3.2.5.1:

27K

TRSO

FC+ FCSPSP+ LOAD+

LOAD-

TKTK+ SL+ SL-

AM5888S

Figure 3.2.5.1 Open/close drive circuit diagram

STBY

V1P4

FMSO

TRCLOSE

TROPEN

DMSO

FOSO

2. Working principle: when machine is reading disc normally, pin 6, 7, 9, 10 of AM5888S is 0V. After

R203

R202

R314

10K

R204

15K

MT1389

R201

10K

27K

pressing OPEN button, pin 6 inputs high level, pin 10 LOAD+ outputs high level, electric machine rotates

positively and performs the action of opening door. When closing door, pin 7 inputs high level, pin 9

LOAD- outputs high level and forms loop to pin 9 through electric machine, electric machine rotates

reversely and performs action of closing door. After closing to proper position, all pins are low level.

Servo drive principle is the same with that of D5954 solution, so we will not introduce here.

- 21 -

3. Key point voltage (unit: V) is shown as the following table:

Base electrode B Collector C Em ittor E Base electrode B Collector C Em ittor E

Read disc 5.06 5 5.06 5.01 5.03 5.06

Open disc tray to

proper position

4.79 4.77 5.06 4.77 4.79 5.06

Open disc tray 4.74 5.05 4.74 4.76 0.2 4.76 5.06 4.76 4.33 4.76 4.76 5.02 4.76 5.06

Close disc tray 4.74 4.33 4.74 4.76 5.05 4.76 5.06 4.76 5.03 4.76 4.79 0.2 4.79 5.06

Base electrode B Collector C Em ittor E Base electrode B Collector C Em ittor E

Read disc 0 5 0 0 5.03 0

Open disc tray to

proper position

0 4.77 0 0 4.79 0

Open disc tray 0 0.93 0 4.76 0.2 4.76 0 0 4.79 5.02 4.79 0

Close disc tray 0 4.76 5.05 4.76 0 0 0.93 0 4.79 0.2 4.79 0

Base electrode B Collector C Em ittor E

Read disc 0 0 0 0 0

Open disc tray to

proper position

0 0 0 0 0

Open disc tray 0 0.63 0 0 0 0 3.12 0 0

Close disc tray 0 0 0.93 0 0 0 0 3.12 0

State

Q309

Q307Q306

Q308

Q310

OUT IN

3.2.6 Main axis control circuit

1. Main axis control circuit is shown as in the following figure 3.2.6.1:

C307 222

SP-

SPL-

R320 150K

R321 1R

R317 680K

C308 222

R318

R319 150K

R322 680K

OPO

ADIN

OP-

OP+

V1P4

MT1389

Figure 3.2.6.1 Main axis control circuit diagram

- 22 -

2. Function: disc is always in high speed rotation in the course of disc reading, when you need to

Key point Position Normal w orking voltage (V) Volateg change w hen disc out ( V)

SP+ Pin 11 of D5954, pin 5 of XS307 3.79 3.79 0.70 1.80

SP- Pin 2 of D5954, pin 6 of XS307 1.38 1.38 3.40 1.80

OP+ Pin 36 of MT1389 1.38 1.38 3.10 1.80

OP- Pin 35 of MT1389 1.53 1.53 3.08 1.98

OPO Pin 34 of MT1389 2.44 2.44 0.40 2.50

ADIN Pin 47 of MT1389 2.44 2.41 0.41 2.44

DMSO Pin 5 of D5954 1.42 1.42

VIP4 Pin 30 of MT1389 1.41 1.41

open the door to change disc, MT1389 stops the positive direction drive signal which is given to main

axis drive circuit, for the function of inertia disc is still rotating. If disc out order is performed at this time,

disc will be abrasively damaged. Therefore, machine must be baking to main axis, that whether disc has

stopped rotating and whether disc is reversing, decode chip of the machine cannot recognize. So a main

axis control circuit is added to make decode chip can effective monitor that whether disc has stopped

rotating.

3. Working principle: MT1389 has a comparator inside composed of operational amplifier, in which

OP+ is the in-phase input end of operational amplifier, OP- is reverse input end, OPO is output end,

when playing disc normally, for electric machine is positive direction rotating, voltage of OP+ is higher

than that of OP-, voltage of OPO is more than 1.4V. When disc out is needed, main axis drive signal

stops, for electric machine is permanent magnetic, when in rotating, induced electromotive force

produces in two ends to give to decode chip through R320, R319 sampling to make OPO output less

than 1.4V voltage and transmit to input pin of MT1389 ADIN through R318. When ADIN is high level,

main axis drive output end has not any drive signal output, when ADIN is low level, MT1389 outputs a

reversing drive signal to main axis drive circuit to make main axis electric machine speed down. Thus

circular working goes on until main axis stops rotating. PDVD is manual disc out means, so after disc out,

disc is still rotating, but will stop very son.

4. Key point voltage (unit: V) is shown as the following table:

- 23 -

3.2.7 Decode circuit

1. Decode circuit block diagram is shown as in the following figure 3.2.7.1:

FLASH

PWR

PRD

PCE

A0~A20

AD0~AD7

URST

Reset circuit

MT 1389

SDA SCL

EEPROM

24C02

Figure 3.2.7.1 Decode circuit block diagram

Clock

27M

V18

1.8V voltage regulating

U206

SDCLK

SDCKE

DCS

DRAS

SWE

SDRAM

DQM0

DQM1

DQ0~DQ15

MA0~MA11

2. Working principle: this decode circuit is mainly composed of MT1389, SDRAM and FLASH.

Working condition of decode circuit has:

(1) Reset: refer to reset circuit working principle for details.

(2) Clock: this system adopts 27M external clock input, and produces clock signal required by

system inside through internal frequency doubling circuit.

(3) Power: decode chip adopts twp groups power supply of 3.3V and 1.8V, in which 1.8V mainly

supply power for internal logic control circuit and we call it core voltage.

After power on, reset circuit performs reset to MT1389 built-in CPU (8032) and FLASH, decode chip

outputs reset signal at the same time and performs reset to other circuit. After system reset, it firstly

sends out read signal to FLASH to read out in formation saved in FLASH, the machine displays power-

on picture, servo system begins to work to check whether machine closes door to proper position and

whether detect switch has been closed, if not, the door close action is performed. After detect switch of

door is closed, the machine begins to perform preparations of disc reading and performs panel display

at the same time of working.

Playback process: laser head picks up disc signal from disc, after servo system processing, then

send to decode circuit for decoding, signal after being decoded is saved in SDRAM for the moment.

When machine needs to replay signal, decode circuit calls information inside SDRAM to perform D/A

conversion and then output.

- 24 -

User information storage: information content set by user is saved inside EEPROM, if user does not

refresh or reset this information, it will saved in IC permanently.

Audio, video output circuit: at present, MT1389 all integrates video D/A converter, MT1389E inside

integrates audio D/A converter, manufactures select according to their own needs. Please refer to

circuit principle diagram and audio circuit explanation for details.

3.2.8 Video circuit

1. Video signal flow chart diagram is shown as in the following figure 3.2.8.1:

YUV1

191

YUV2

189

YUV3

187

YUV4

185

MT1389

YUV5

183

YUV6

182

L225

L226

L227

XS204

D209

D210

D211

L701

L702

L703

Figure 3.2.8.1 Video signal flow chart

VIDEO-SY

VIDEO-SC

VIDEO-CVBS

JK703

D703

D704

D705

VIDEO-G/Y

VIDEO-B/U

VIDEO-R/V

VIDEO

SCART

2. Working principle: MT1389E has built-in video D/A conversion circuit, video output has R/B/G

Y/Pb/Pr Y/Cb/Cr CVBS Y/C output mode, in which R/B/G Y/Pb/Pr Y/Cb/Cr Y/C cannot output at the

same time and need the switch through software. CVBS is a separate output mode, 4-path video signal

outputted by MT1389, through video filtering clamping, output to AV board.

Shown as in the figure 3.2.8.2, capacitor C287, C288 and inductor L214 compose a low-pass filter

to filter high frequency disturbance signal except useful signal; dual diode D211 composes a limiter

circuit, known from features of diode that the max amplitude of composite video signal CVBS cannot be

over 5.7, and the mix cannot be less than -0.7, thus the high voltage signal from TV set can be avoided

burning down the player.

5VV

L227

YUV3

1.8uH

VIDEO_CVBS

D211

R248

75R

VGND

C287

C288

101

Figure 3.2.8.2 Video output circuit

101

- 25 -

1N4148*2

VGND

3.2.9 Reset circuit

1. Reset circuit is shown in the figure 3.2.9.1:

DV33

TC208

R221

10K

URST#

R222

33R

47uF/10V

R220

C272

1N4148

D201

R219 10K

Q201

2SC1815-YS

104

GND

Figure 3.2.9.1 Reset circuit diagram

2. Working principle: after power on, voltage of DV33 increases to 3.3V, main chip power supply is

normal, because voltage of DV33 cannot change suddenly, Q201 base electrode has current in, Q201 is

saturated on, URST is low level; DV33 charges TC208 through R219 and Q201 emitter electrode to

make TC208 cathode voltage decrease slowly. When this voltage reduces below 0.7V, Q201 cuts off,

URST changes into high level, and the process for URST from low to high is called low level effective

reset signals by us. After power off, DV33 voltage reduces, TC208 and DV33 voltage reduce together,

D201 performs surge discharge and clamping to Tc208.

3.2.10 Audio circuit

1. Audio circuit block diagram is shown in the figure 3.2.10.1:

SLRCK

AMDATA

MT1389

CS5340

ASPDIF

228

227

226

224

223

222

SACLK SBCLK

CTR

ALS

ARS

filtering

Audio amplifying

Mute circuit

MIC board

IEC958

AV board

Audio terminal

Figure 3.2.10.1 Audio circuit block diagram

- 26 -

+ 90 hidden pages