BBK DK3630, DK3640X Service Manual

DV828X(RU)

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

2.1.1 Brand-new AV Effects

2.1.2 High Quality Digital Audio

2.1.3 Many Convenient Features

2.2 Control Button Locations and Explanations

2.2.1 Front Panel Illustration

2.2.2 Rear Panel IIIustration

2.2.3 VFD Display Window Illustration

2.2.4 Remote Control Illustration

2.3 Accessories

2.4 How to Play Karaoke Songs Disc (OKD)

2.4.1 Preparations for Playing OKD

2.4.2 Preparations for Singing

2.4.3 General Steps of Playing OKD

2.4.4 How to select songs

2.4.5 Random playback

2.4.6 My Favourite

2.4.7 Karaoke setting

2.4.8 OPERATION PROMPTS

2.4.9 Various Playback Functions

2.5 FUNCTION SETUP

2.5.1 Function Setup

2.5.2 Language

2.5.3 Image

2.5.4 Sound

2.5.5 Playback

2.5.6 Karaoke

2.5.7 Preference

2.5.8 Parental control

2.5.9 Initial setup

2.5.10 Rest to defaults

2.5 Specifications

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Block diagram of the player

3.1.2 PCB board composition diagram of the player

3.1.3 Introduction to IC of the player

Section Two Unit Circuit Principle

3.2.1 Laser head circuit

3.2.2 Servo circuit

3.2.3 Laser power control circuit

3.2.4 CD/DVD switch circuit

3.2.5 Open/close door drive circuit

3.2.6 Main axis control circuit

3.2.7 Decode circuit

3.2.8 Reset circuit

3.2.9 Video circuit

3.2.10 Audio circuit

3.2.11 Mute circuit

3.2.12 Power circuit

3.2.13 MIC circuit

3.2.14 USB jack circuit

3.2.15 AV output board circuit

3.2.16 Panel control circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Waveform diagramS

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 29LV160BE

3.5.5 function introduction to HY57V641620HGT-7

3.5.6 function introduction to 4580

3.5.7 function introduction to AM5888S

3.5.8 function introduction to Pt6961

3.5.9 function introduction to VIPER22A

3.5.10 function introduction to Hs817

3.5.11 function introduction to LM431A

Chapter Four Disassembly and Assembly Process

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

Chapter six BOM List

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 entertainments world. The 2-laser super error-correction mechanism supports CD-R.

2.1.1 Brand-new AV Effects

1. Compatible with DivX, MPEG4 discs to produce wonderful pictures.

2. 108MHz/12bit video DAC, with more vivid and brilliant pictures.

3. 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

4. Brightness, chroma and contrast adjustment functions to render your eyes more comfortable.

5. Digital echo Karaoke to enable your singing easier.

6. Composite Video, S-Video and Component Video outputs.

7. Bullt-In Dolby Digital decoder, separate 5.1Ch Outputs.

8. Dolby output for 2channel(DOWNMIX)

KTV song selection menu makes your operation easier.

Multiple song selection means by singers, type, language classification and number make you

10.

enjoy yourself

11. .

12. .

13. .

14. .

Singing means of song selection and random playing provide you with wide performance stage Auto scoring and applause functions act as good entertainment help

Dual-channel Karaoke system Support 1080I/720P high definition format output

2.1.2 High Quality Digital Audio

1. Optical and coaxial outputs for Digital audio.

2. DTS,Dobly Digital, PCM Digital audio outputs to satisfy the Fans acoustic requirements.

2.1.3 Many Convenient Features

1. Screen saver protects your TV set carefully.

2. The novel Mp3 playback window GUI provides you a new way to appreciate Mp3 music.

3. Multi-angle playback function makes it possible for you to view a scene from different camera

angles.

4. It’s possible to select the desired beginning, development and ending of a story.

5. Direct entry into desired scenes(title/chapter/track search).

6. Zooming function to zoom up any playing picture.

7. Multiple aspect ratios to fit TV sets of various screen ratios.

8. Parental lock function to prevent children from watching unsuitable discs.

9. Multiple dubbing languages and subtitle languages bring you the best entertainment status all

the time.

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2.2 Control Button Locations and Explanations

2.2.1 Front Panel Illustration

10 11

Disc tray

Display window

IR SENSOR

MIC 1 jack

MIC 2 jack

VOL1 +/- button

VOL 2 +/- button

Push button

Slot flap for USB

2.2.2 Rear Panel Illustration

141516 17

POWER switch

Number buttons

OPEN/CLOSE button

STOP button

6 7

8 9

PLAY button

PREV button

NEXT button

CLEAR button

42 3

Mixed Audio out jack

5.1CH Audio Out jack

Video Out jack

S-Video

Video Component /Y Pb Pr out jacks

Digital Audio Coaxial Out jack

2.2.3 LED Display Window Illustration

Playback time

2.2.4 Remote Control Illustration

Button[ ]

Open or close the disc tray.

LANG Button

Change the audio language or audio channel/switch

English and Russian input means.

5 6

MEMORY Button

Digital Audio Optical Out jack

SCART out jack

Memorize position or skip to memory point to play/add song into personal collection.

DISP Button

Display or hide disc information.

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12 13 14

NUMBER Buttons

2 3 4

15 16

17 18

8 9

23 24 25

USB DVD Button

VOL +/- Button Increase/decrease volume level/open or close OKD Karaoke volume setup menu.

MUTE Button Press once to mute, twice to unmate.

Input Russian English letter and number.

BROWSE/S-Song Buttons switch new user interface/open or close the menu of songs been selected.

CURSOR Buttons

SETUP Button Function Setup.

[ ]

Button

Open/close the virtual keyboard function/stimulate

applause when playing OKD disc.

KARAOKE Button Karaoke operation menu/open or close OKD Karaoke

menu.

[ ]

Button

Fast backward play.

[ ]

Button

Skip backward/return to the previous song.

PEPEAT Button Repeat play/Repeat play the song being played when

playing OKD disc.

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.

Q-PLAY Button Skip the advertisement/warning and play the DVD direc tly/enter personal collection menu when playing OKD.

ANGLE Button Change camera angle, MP3/JPEG playback mode switch.

MENU/RETURN Button Display DVD menu or open/close PBC/return to the previous menu.

OK Button

Cancel Button Cancel personal information/cancel personal collection and songs been selected and cancel Russian English letter and number that just being input.

ZOOM Button Zoom in/out the displayed frame/increase or decrease voice volume when playing OKD.

[ ]

Button Play or pause playback. [ ]

Button

Fast backward play.

[ ]

Button Stop playback/when playing OKD, after the current song stops playing, the next song begins to play.

[ ]

Button

Skip forward/switch to the next song.

2.3 Accessories

AUDIO/VIDEO

REMOTE CONTROL

AAA SIZE BATTERIES 2PCS

WARRANTY CARD 1PCS

USER MANUAL 1PCS

CORD 1PCS

1PCS

- 6 -

2.4 How to Play Karaoke Songs Disc (OKD)

2.4.1 Preparations for Playing OKD

After well connecting system according to the relevant requirements, turn on power of TV, and switch into AV state. If a power amplifier is connected, turn on its power at the same time.

1.Press [POWER] button to switch on power,

display screen is lightened, TV screen displays power-on picture and the player begins to search disc automatically.

2.Press [OPEN/CLOSE] button to eject disc tray,

and then load the disc presented (OKD) into disc tray.

3.Press [OPEN/CLOSE] button to close disc tray,

playback starts and the player automatically enters the main menu picture of song selection.

2.4.2 Preparations for Singing

1. Insert microphone into MIC jack of the player.

3. Press UP/DOWN button to select your desired menu, and press [OK] button to enter the submenu picture. If you want to select other menu, you may press [MENU/RETURN] button to back to the previous menu and select again. If you want to select other function icons, you may press [MENU/RETURN] button to back to “OKD ” menu, and then press LEFT/RIGHT button to select. If you want to quit OKD menu, please press [KARAOKE] button.

2.4.4 How to select songs

2.Set microphone switch at "ON" position in setup menu and press [VOL+/-] button on remote control to pop up “

”. Press UP/DOWN buttons to move the cursor

to “ ” item and then press LEFT/

RIGHT button to adjust microphone volume. Press UP/DOWN button to move the cursor to “

” item and then press LEFT/RIGHT button to adjust proper echo degree.

: ADJUST VALUE: PREV/NEXT ITEM

# During the course of singing, speaker will have

whistle sometimes, and now you may take microphone far away from the speaker or reduce microphone volume to remove whistle. Please do not make microphone face towards the speaker.

# After singing finishes, firstly set the switch of

microphone at "OFF" position, and then unplug microphone.

2.4.3 General Steps of Playing OKD

1. After reading OKD, the player directly enters

(OKD) song selection system and the screen displays (OKD) disc main menu.

2. Pressing UP/DOWN buttons continuously may

enter the previous or next page.

1. Select song via singer: select song according to the name of the original singer.

# Enter the menu of “ “ , after

selecting a singer of some kind, the name of the singer appears. Press UP/DOWN button to select your desired singer, and then press [OK] button to enter the songs menu of this singer. According to this menu, select your desired song, and then press [OK] button to add this song into the list of selected songs.

You may also use T9 input method to input the

first letter of the singer's name according to the prompt on interface, and system will

automatically search the relevant singers.

For instance, you want to search " “. Operation steps: press [LANG] button firstly to set the current input method to Russian input method, then press number button [2] third to input the first letter " " of " “, press number button [6] button second to input the first letter " " of " “ and you may search “ “.

§£§¦§²§¬§¡ §³§¦§²§¥§À§¹§¬§¡

: search and select song

according to the first letter of the song’s name.

For instance, you want to search “ ". Operation steps: press [LANG] button firstly to set the current input method to Russian input method, then press number button [5] fourth to input the first letter “ “ of “ “, press number button [6] button second to input the first letter “c“ of " “and you may search “ “.

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NOTE :If you want to search English song, press [LANG] button to switch to English input method and then search English songs by using the Above method.

# When you select songs via T9 input method, if

you input incorrect letter, you may press [CANCEL] button to delete the wrongly inputted letter and then input new letter.

: select song according to

the type that the song belongs to.

#Enter the menu of " ”, select

your desired type and then press [OK] button to enter the songs menu of this type. According to this menu, select your desired song and then press [OK] button to add this song into the list of selected songs.

4. : select song according to

this song’s language classification.

§¡§ß§Ô.

#Enter the menu of “ “, select

your desired langrage classification and then press [OK] button to enter the songs menu of this language classification. According to this menu, select your desired song and then press [OK] button to add this song into the list of selected songs.

5. : select song directly according to its serial number. You may select your desired serial number in the presented song election book.

According to the serial number of songs in the book, select item of " “ during the course of playing songs, and the interface of selecting song via number displays. Press number buttons to input serial number of the song and then press [OK] button to confirm the selection.

NOTE

#When invalid serial number is inputted or the

input has error, you may press [CANCEL] button to cancel and then press number button to input other serial number.

#If the player is in stop state, the song selected

through pressing [OK] button by you will be played automatically.

#If you do not select songs in a long period,

system will automatically play the entire disc at random. In menu interface, if you do not operate in a certain period, menu will disappear

Automatically.

2.4.5 Random playback

There two options for random playback function: random playback for all and random playback for classification, shown in the following figure:

#You may select one option according to your

own needs. If option of “ ” is selected, the player will play all songs in this disc randomly; if option of “ ” is selected, the player will play all songs in a certain classification randomly.

#If you want to start random playback for all or

for classification, please stop the playback of all songs being played currently.

#During the course of random playback, you

cannot enter song selection menu. If you want to quit random playback mode, please press [KARAOKE] button firstly, then press [STOP] button; after quitting random playback mode, press [STOP] button to enter song selection menu immediately.

2.4.6 My Favourite

In main menu interface of OKD disc, press LEFT/RIGHT button to select "Personal" icon, or quit the main menu of song selection and directly press [Q-PLAY] button to enter the interface of personal songs collection menu. There are 4 functional options in this interface: “ ”, “ ”,” ” and” ”. When no song exists in personal songs collection, on“Songs list" item displays when playing songs.

#Enter songs list, you may select and play songs

in personal songs collection, or add the song into the list of selected songs. Move the cursor to the song selected, press [CANCEL] button to cancel the selected song.

#If you want to play songs in personal songs

collection continuously, please select "Continuous playback" item.

#Ranking list: when comptition function (refer to

page 27 for details) is on, score of singer's singing will be memorized and displays on the ranking list according to sequence of high score to low score, shown in the figure:

- 8 -

1272

§¡§-§À§®§ª§¯§ª§¦§£§½§¦ §°§¤§µ§²§¸§½

0076

§¢§¦§-§¡§Á §®§¦§´§¦§-§ª§¸§¡

0183

§¤§°§-§µ§¢§½§¦ §¤§-§¡§©§¬§ª

0219

§¥§£§¦ §³§£§¦§¹§ª

098

088

070

050

NOTE

#In setup men, after selecting "Default settings",

all songs in personal songs collection and the content of ranking list will be cancelled (refer to page 21 for details).

2.4.7 Karaoke setting

Select " “ item and press [OK] button to enter Karaoke setup interface. There are 3 function setup items, shown in the following figure:

#Press UP/DOWN button to move cursor to the function item selected, and press [OK] button to turn on or off this function. After setup finishes, press [KARAOKE] button to quit setup menu.

: after selecting “ON”, lyrics

background will become light grey.

: when score is up to or over 60,

applause will appear.

: select “ON”, after singing finishes, a score will be given to the singer automatically.

4.Competition: select "ON" and you may enter song selection system to select songs and begin game. Top left corner of the screen displays as in the picture:

No 0012 SCORE 078 ROUND 016

SCORE

ROUND

Song number of challenger

Score of challenger

Challenge times

NOTE

#Applause function is available only when

scoring function is turned on.

2.4.8 OPERATION PROMPTS

#” “ item gives a brief explanation

NOTE

#If abnormalities appear in the course of

operation, press [SELECT SONG/MENU] button to quit OKD menu and then enter again.

Vocal adjust

When playing songs with voice, press [ZOOM-] button and voice volume decreases Gradually,

Minimum value is Level 1 and screen displays Level 6~Level 1 in turn; contrarily, press[ZOOM+] button, voice volume increases gradually and screen displays Level 1~Level 6 in turn. You may adjust voice volume according to whether you are familiar with the song to reach the purpose of learning to sing.NOTE:This function is available only when songs with vocal.

2.4.9 Various Playback Functions

1. Vocal

When playing OKD, if the song has vocal, you can press [LANG] button to switch vocal on or off.

2. Replay

When playing songs in OKD, press [Repeat] button and the player will play this song from beginning, which is convenient for you to sing repeatedly.

3. Add song to My favourite

Wen playing a cettain song on OKD, if you like this song and have a mind to add it into the personal songs collection, press [MEM] button.

If you want to collect the song being played

currently, firstly confirm whether you have quitted song selection song. If not, please press [KARAOKE] button to quit and then press [MEM] button to add it into personal songs collection. If you want to collect songs in the menu being

browsed currently (not songs being played currently), move cursor to this song and then press [MEM] button to add it into personal songs collection.

4. Applause

In order to activate atmosphere and add singing pleasure, in the course of playing songs, you may press [ ] button andsystem will play applause immediately.

5. Next/switch song

During the course of playing songs, press [ ] button to switch and play the first song in the list of selected songs, and this song will automatically deleted from the list of selected songs. #If no songs exist in the list of selected songs,

this button is invalid.

6. Prev/replay

During the course of playing songs, if you want to replay the song that has been played before, you may press [ ] button. Each time when you press this button, system will return to the previous song. 5 songs at most are available for system to return.

7. Songs been selected

When playing OKD, press [BROWSE/S-SONG] and the list of songs which have been selected will display, with the song you selected just nowincluded. All songs are arranged according to the sequence of song selection. #If the list of songs been selected has songs in it, press [ ] button and system will automatically skip to the next song. #f you want to delete any song from the list of songs been selected, move the cursor to the

- 9 -

Track that you want to delete and press [CANCEL] button to delete the track selected. #f you want a certain song in the list of selected songs to be played in the priority, firstly move the cursor to the track that you wish to play, and then press [OK ] button to move the track selected to the first. Until the current song finishes playing, press [ ] button and this song may be played immediately.

2.5 FUNCTION SETUP

2.5.1 Function Setup

1.Press the [SETUP] button and the screen

displays the selection menu of function setup.

Off

Setup menu

DVD menu

Soundtrack

Subtitle

AUTO

PAL

NTSC

Off

Language

Image

Sound

Playback

Karaoke

Preference

Parental control

Initial setup

Reset to defaults

Exit

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

desireditem 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.

TV system

TV scan

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

S-Vid.

5.Press [LEFT] button if you want to return to the previous setup page.

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

2.5.2 Language

Setup menu

DVD menu

Soundtrack

Sbutitles Off

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,

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

#Default: Off.

Russian

English

Ukrainian

Russian, English

2.5.3 Image

Off

AUTO

PAL

NTSC

TV system

TV scan

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

S-Vid.

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

Video out.

TV format

Sharpness

Gamma

Brightness

Contrast

Hue

Saturation

AUTO

S-Vid.

Off

High

Medium

Low

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 : To set

scan mode

Optional settings: Progressive , Interlaced,

Progressive scan, Interlaced

720P, 1080I.

Default: Interlaced .

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

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

interface,please select RGB. Other wise , please select Com-ponent,and when using SVideo output please select S-Video.

- 10 -

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.

#Default: 16:9 letterb..

5.Sharpness:Used to set the sharpness of video

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

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.

2.5.4 Sound

Mixer...

Digital output

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 discwith

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

leftand 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.

Configuration

Stereo mix

Surr. Mix

Low band

Channels

Delays

PRO Logic II

St.

L+R

sum

FSW.

Off

St.

L+R

sum

FSW

Off

Stereo

5.1

#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

thedesired 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.

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

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

- 11 -

3. 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.

2.5.5 Playback

DVD

VCD/SVCD

Files

Repeat

A. P. V

Advertisemenu No

Off

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

No ast

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.

Microphone

Kar. help

Volume

Echo

No ast.

2.5.7 Preference

1.DVD: set whether information of advertisement and warnings at the beginning of DVD disc is skipped to play the movie directly.

Always skip ads

#Optional setting: Yes, NO #Default: NO.

2.VCD/SVCD: To set the PCB 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.

2.5.6 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.

Off

LED Control

Gr. equalizer

Screen saver

1.LED Control: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.

2.5.8 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.)

PG-13

PGR

NC-17

- 12 -

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

Playerab le dis cs

Input

Audio outputs

Video outputs

Video C harac teris tics

Audi o characteristics

Operat ing volt age

Power c onsum ption

General Spec ification

Operat ing T emperat ure

Operating Humidity

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%

Output

5~35

Analog audio output: Stereo, output 5.1CH Digi tal audio output: Coaxial, O ptical

Compos ite, S -Vid eo, comp onent Y C b Cr, progr essi ve scan output Y Pb Pr , RGB/SCART

Headphones output

15~75%(no condensation)

Dimensions: 430mm 266.4mm 50.6mm Mass: 2.2kg

~110-250V, 50/60Hz

14W

R ,NC-17.

#Default: any.

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

#Default: 7890.

2.5.10 Rest to defaults

Load factory seeings

OK Cancel

Old password

New password

Verify

Cancel

2.5.9 Initial setup

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.

2.5 Specifications

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

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.

#Design and specifications are subject to change without notice. #We do not guarantee that all discs can be played smoothly due to the disc quality, disc recording

quality and recording format.

- 13 -

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Block diagram of the player

DV828X(RU) is composed of decode circuit, servo circuit, audio circuit, video circuit, MIC circuit

and power circuit. Block diagram of the player is shown in the figure 3.1.1.1:

Output terminal

VR-DVD

VR-CD

Loader

Feed electric machine

Main axis electric machine

OPEN/CLOSE circuit

SL+

SL-

SP+

SP-

LOUD+

LOUD-

CD/DVD

VR-CD

Switch

Laser

power control

MDI

DVD:A/B/C/D/RFO

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

V20

TRIN

TROUT

LIMIT

TK+ TK-

FC+

U301

Am5888S

FC-

IOA

LD02

LD01

VIP4

STBY

FOSO

FMSO

DMSO

TRSO

TROPEN

TRCLOSE

TR_B1

REG01

TR_B2

REG02

Audio

amplifying

ALS

Voltage drop circuit

FSO

MIC1

MIC2

A[0-20]

AD[0-8]

CS#

RAS#

CAS#

WE#

DQ[0-15]

MA[0-11]

BA0

BA1

DCLK

DCKE

U207

FLASH

SDRAM

U208

audio

U209

U210

U211

CTR

ARS

ASPOIF

YUV1

G/Y

CVBS

Video filtering clamping

YUV2

YUV3

YUV4

B/U

R/V

MIC board

YUV5

YUV6

U201

MT1389

SCL SDA

URST

Reset circuit

U202

24C02

VCC

3.3V

VCC

1.8V

VSDA

VSCK

VSTB

Panel, remote control receiver

Figure 3.1.1.1 Block diagram if the player

- 14 -

Power board

Cn501

CN502

+5V

-21V

GND

FL+

FL-

+9V

-9V

GND

+5V

GND

Loader

FC-

LOAD-

LOAD+

TROUT

LOAD-

LOAD+

SL+

SL-

LIMIT#

GND

TRIN

GND

TRIN#

TROUT#

SP+

SP-

SL-

SL+

SP-

SP+

GND

LIMIT#

XS306 XS307 XS301

+9V

-9V

GND

XS203

VCC

GND

Decode board

XS201

FS0

VSDA

VSCK

VSTB

GND

VCC

FL+ FL-

-21V GND +5V

FS0

VFDAT

VFDCK

XS402

XS401

+5V

GND

VFDST

Main panel

FC+

FC-

FC+

TK+

TK-

CDIOA

RFO

ABF

GND

V20

AVCC

VR-CD

VR-DVD

CD-LD

MDI

HFM

DVD-LD

GND-LD

TK-

IOA

TK+

RFO

V20

GND

XS302

DETOKAGND

MDI

AVCC

+9V

HFM

CD-LD

VR-CD

-9V

DVD-LD

VR-DVD

XS204

GND-LD

HSYNC# VSYNC#

IEC958

VCC

R/V

VGND

G/Y

VGND

B/U FSI

VIDEO

+9V

VCC

USBP

USBM

PSDAT2 PSDAT1 SPDIF VCC PR VGND Y1 VGND Pb PDAT0 VIDEO PDAT0 L# AGND R# +10V

XS701

board

- 15 -

Figure 3.1.2.1 PCB board composition diagram of the player

DET

XS601

-9V

+9V

VCC

AGND

USBP

USBM

XS602

Ok board

3.1.2 PCB board composition diagram of the player

PCB board composition diagram of the player is shown in the figure 3.1.2.1:

3.1.3 Introduction to IC of the player

PCB semi-finished product IC mod el Locati on Function

MT1389HD U201 Decod e chip

24C02 U202 EEPROM

CS5340 U203 A/D c onversi on

HL139 U206 IIC command

29LV160BE U207 FLASH

HY57V641620HGT-7 U208 SDRAM

4558 U209,U210,U211 Operat ional amp lif ier (au dio ampl ifyin g)

AM5888S U302 Servo dr ive

PT6961 U401

Panel control IC

HS0038B3V U403

Remote control recei ver

VIPER22 U501 Power s witc h IC

HS817 U502 Photoel ectr ic coupler

LM431A U503 Prec ision voltage s tablizer

OK board 6DV1200-0 KA4558 U601,U602 Operational amplifier (MIC amplifying)

Power b oard

5DV985-4

4973-2

4DV1200S-1

Decod e board

2DV985-5

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

- 16 -

Section Two Unit Circuit Principle

Pin Name Signal flow direction DVD dis c CD dis c 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 s ignal

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 s ignal used in trace

12 GND Ground 0.01 0.01 0 Grounding

13 V20 Input loader 2.04 2.06 2.03 Reference v oltage

14 Vcc Input loader 5.04 5.04 5.02 Supply voltage f or 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 V R-CD Input loader 0.21 0.01 0

Through the handling inside loader, make sure

MD11 is 180mV w hen reading CD

18 V R-DV D Input loader 0.01 0.2 0

Through the handling inside loader, make sure

MD11 is 180mV w hen reading DVD

19 LD- CD Input loader 0.09 2.1 0 CD laser pow er contr ol signal

Focus err or signal is added to tw o sides of pick-

up foc us coil

Trace err or signal is added to tw o sides of pick-

up trace c oil

3.2.1 Laser head circuit

1. Laser head flat cable functionintroduction is shown in the following table:

- 17 -

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

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

21 HFM Input loader 5.04 5.04 5.02

High frequency overlapping signal produc es

laser w ith diff erent w ave length inside loader

22 Blanking unused 0.01 0.1 0

23 LD- DV D Input loader 2.21 0.1 0 DVD laser pow er contr ol 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: loader DVD laser diode wave length is 650nm and that of CD laser diode is 790nm;

if wave length is between 370nm and 750nm is visible light, laser during the course of reading DVD disc

is visible light and that if IR light when reading CD disc.

(2) Principle of laser head pick-up signal: laser beam projects onto disc vertically. When focus of

laser beam projects into disc, laser beam will produce reflection and reach light detect device through

reflection loop and switch into electric signals through photo-epectric conversion. The reflection loop

produced in non-pit information area and pin information area on discs are different and reflect into

different areas of light detect device, the photo-elecric diode in different positions of light detect device

will produce different signals to process light detect device diode signals and then produce digital

signals.

(3) Focus and trace winding: when laser head is reading signals normally, information side should

be in the focus of laser beam. Because of disc error and some factors, such as high speed rotation nd

mechanical error, laser beam will deviate from information side unavoidably to produce phenomena of

deflection and de-focusing; focus and trace coil are added to adjust laser beam to make it focus in

information area correctly.

(4) RF signal formation: when reading disc normally, light detect device will have 160MV vague eye-

shape waveform that are superposed on A, B, C, D, through being superposed by adder inside light

detect device, output RF signals from RFO pin; frequency when reading DVD disc is far higher than that

when reading CD disc and output range is about 1.4V.

- 18 -

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

XS101

Feed electric machine

Main axis electric machine

Main axis control detect circuit

3.2.2.1:

TK- TK+

FC+

FC-

SL+

SL-

SP-

SP+

Switch circuit

APC circuit

A B C D E F RFO

AM5888

IOA

MD11 LDO2 LDO2

FOSO

FMSO

TRSO

DMSO

Open/close circuit

MT1389

Figure 3.2.2.1 Servo circuit block diagram

2. Working principle: after power on or close to proper position (on loader frame for normal DVD, as

for PDVD, on PCB at the lower part of door), 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

- 19 -

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

Control 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 bring along disc to

rotate. After processing of amplification by VGA voltage control amplifier and 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 power 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.

- 20 -

3.2.3 Laser power control circuit

Location Read DVD disc Read VCD disc Location 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

1. Laser power control circuit is shown in the figure 3.2.3.1:

LDV33

R301

4.7R TC302

47uF/10V

LDO2

Q301

2SB1132-S

XS301

MD1

Q302

20/21

MT1389

2SB1132-S

LDO1

TC303

47uF/10V

4.7R

R302

Figure 3.2.3.1 Laser power control circuit diagram

2. Working principle

Pin 20/21 of Mt1389 is laser power detect input pin, pin 21 is DVD laser power strong/weak detect

signal input pin, pin 23 is VCD laser power drive control output pin and pin 22 is DVD laser power drive

control output pin.

LDV33

When reading VCD discs, laser power becomes weak, voltage of MDI pin decreases, voltage of pin

23 of Mt1389 decrease to make voltage of pin 19 of Xs301 increase to reach the purpose of promoting

laser power. When laser power is too strong, voltage of MDII pin increases to make 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 output pin and

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

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

- 21 -

3.2.4 CD/DVD switch circuit

Base electrode B Collector C Emitter E Grid electrode G Drain electrode D Source electr ode S

DV D dis c 0 3.86 0 3.81 0.18 0

V CD dis c 0.64 0.1 0 0 0 0

G D S

DV D dis c 0 0 0

V CD dis c 3.27 0.18 0

State

Q305 Q303

Q304

State IOA

3.3

1. CD/DVD switch circuit is shown in the figure 3.2.4.1:

R308

100K

Q305

XS301

Q303

2SK3018-S

Figure 3.2.4.1 CD/DVD switch circuit diagram

3904-S

Q304

2SK3018-S

R309

10K R311

10K

R310

100K

AVCC

IOA

MT1389

2. Working principle: after loading disc into the machine, IOA end of ,Mt1389 is defaulted high level

to make Q305 saturated on and form loop with CD laser power control circuit on loader. At the same time,

IOA directly reaches loader PD IC for switch and disc begins to rotate. When servo processing system

identifies that disc in machine is not CD, IQA pin outputs low level to make Q305 cut off, Q303 is on and

forms loop with DVD laser power control circuit on loader to perform the action of reading DVD disc.

After disc tray opens, IOA still keeps the state before opening disc. If the machine cannot identify which

disc is in this machine, IQA pin will switch continuously until disc has been read or system judges that

there is no disc in.

Note: Q303, Q304 are MOS pipe

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

- 22 -

3.2.5 Open/close door drive circuit

Base electrode B Collector C Emittor E Base electrode B Collector C Emittor E

Read disc 5.06 5 5.06 5.01 5.03 5.06

Open disc tray to

proper pos ition

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 Emittor E Base electrode B Collector C Emittor E

Read disc 0 5 0 0 5.03 0

Open disc tray to

proper pos ition

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

State

Q309

Q307Q306

Q308

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

27K

TRSO

FC+ FCSPSP+ LOAD+

LOAD-

TKTK+ SL+ SL-

AM5888S

Figure 3.2.5.1 Open/close door drive circuit diagram

STBY

V1P4

FMSO

TRCLOSE

TROPEN

DMSO

FOSO

2. Working principle: when machine is reading discs normally, pin 6, 7, 9 of AM5888S are all 0V.

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

R203

R202

R314

10K

R204

15K

MT1389

R201

10K

27K

rotates in positive direction and performs action of opening door. When closing door, pin 7 inputs high

level, pin 9 LOAD- outputs high level and forms loop through electric machine, which reverses to carry

out action of closing door. After closing ti proper position, all pins are low level. Servo drive principle is

the same with the drive of D5954 solution, so we will not repeat here.

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

- 23 -

Base electrode B Collector C Emittor E

Read disc 0 0 0 0 0

Open disc tray to

proper pos ition

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

Q310

OUT IN

3.2.6 Main axis control circuit

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

C307 222

OPO

SP-

SPL-

R320 150K

R321 1R

R319

R317 680K

C308 222

R318

ADIN

OP-

OP+

V1P4

MT1389

150K

R322 680K

Figure 3.2.6.1 Main axis control circuit diagram

2. Function: disc is always in high speed rotation state when machine is reading discs, when it is

necessary to open door and change another disc, MT1389 stops giving positive phase drive signals to

main axis drive circuit, but disc is still rotating due to the function of inertia. If the action of opening door

is carried out at this moment, disc will be worn, so the machine must apply brake to main axis. Whether

disc has stopped rotating or whether it is rotating reversely, decode chip cannot judge, so a main axis

control circuit is added to make decode chip can effectively monitor whether disc has stopped rotating.

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

OP is the in-phase input end, OP- is reverse input end, OPO is output end. When playing normally,

electric machine is rotating in positive direction, voltage of OP+ is higher than OP-, voltage of OPO is

more than 1.4V. When it is necessary ti open disc door, main brake signals stop, electric machine is

eternal magnet, so when rotating, inductive electromotive force produces on two ends, through R320,

R319 sampling, to give to decode chip to make OPO output voltage lower than 1.4V and transmit to

MT1389 ADIN input pin through R318; when ADIN is high level, main axis does not make any acts, when

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ADIN is low level, MT1389 outputs an instant electric machine reverse braking signal to make main axis

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

SP+ Pin 11 of AM5888S, pin 5 of XS307 3.79 3.79 0.70 1.80

SP- Pin 12 of A M5888S, 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 4 of A M5888S 1.42 1.42

VIP4 Pin 30 of MT1389 1.41 1.41

electric machine speed down, and such cycling goes on until main axis stops rotating. PDVD is manual

means for door opening, so disc is still rotating after disc door opening but will stop soon.

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

3.2.7 Decode circuit

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

PWR

PRD

PCE

A0~A20

FLASH

AD0~AD7

URST

Reset circuit

EEPROM

24C02

Figure 3.2.7.1 Decode circuit block diagram

MT 1389

SDA SCL

Clock

27M

V18

1.8V voltage stabilizing

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.

Important conditions for the working of decode circuit have:

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

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(2) Clock: this system adopts 27M external clock input to produce the required clock signals through

inside doubling circuit.

(3) Power: decode chip adopts 2 groups of power supply: 3.3V and 1.8V, in which 1.8V is mainly

provided for internal logic control circuit, which is called core voltage by us.

After power on, reset circuit performs reset to Mt1389 built-in CPU (8032) and FLASH, decode chip

outputs reset signals at the same time and performs reset to other circuits. After system reset, read

signals are firstly sent to FLASH to read out information saved inside FLASH, machine displays

power0on picture, servo system begins to work and check whether door os closed to proper position and

whether detect switch is shut, if not, action of closing door is performed. After detect switch is shut,

machine begins to perform the preparations of disc reading and panel display.

Playback process: laser head picks up disc information from discs, through being processed by

servo system, and sends to decode circuit for decoding, and signals after being decoded are saved in

SDRAM. When machine required to replay signals, decode circuit calls out information inside SDRAM

for output.

Save user information: information set by users is saved inside EEPROM and will be saved inside

IC forever if users does not update or reset this information.

Audio, video output circuit: at present, Mt1389 integrates video D/A converter, Mt1389 integrates

audio D/A converter inside, and manufacturers may select according to their own demands, therefore

when in audio decode output, part is analog output and part is digital output. Please refer to circuit

diagram and audio circuit for details.

3.2.8 Reset circuit

1. Reset circuit is shown in the figure 3.2.8.1:

DV33

1N4148

D201

TC208

47uF/10V

R219 10K

GND

R221

10K

R220

2SC1815-YS

Q201

URST#

R222 33R

C272 104

Figure 3.2.8.1 Reset circuit diagram

2. Working principle: after power on, voltage of Dv33 increases to 3.3V and main chip power supply

is normal. Now, Tc208 cannot change voltage of Dv33 suddenly, base electrode of Q201 has current in,

Q201 is saturated on, URST is low level. Dv33 charges Tc208 through emitter electrode of R219 and

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