SONY DK1830SI Service Manual

DK1910SI & DK1930SI

DK1810SI & DK1830SI

& DK1840SI

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 Controls and functions

2.2.1 Front Panel controls

2.2.2 Rear panel connections

2.2.3 VFD display general view

2.2.4 Remote control general view

2.3 FUNCTION SETTINGS

2.3.1 Function selection and change

2.3.2 Language settings

2.3.3 Image settings menu

2.3.4 Sound settings menu

2.3.5 Playback settings

2.3.6 Karaoke settings menu

2.3.7 Preference settings

2.3.8 Parental Control

2.3.9 Initial setup menu

2.3.10 reset to defaults

2.3.11 Exit settings menu

2.3.12 Channel delay set-up

2.4 Technical characteristics

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Function and features

3.1.2 Block diagram of the player

3.1.3 Introduction to IC used in this player

Section Two Unit Circuit Principle

3.2.1 Introduction to laser head

3.2.2 Servo circuit

3.2.3 Main axis braking control circuit

3.2.4 Disc identification circuit

3.2.5 Disc in/out circuit

3.2.6 Reset circuit

3.2.7 Mute circuit

3.2.8 Video circuit

3.2.9 Audio power amplifying circuit block diagram

3.2.10 Input/output circuit

3.2.11 Control panel components

3.2.12 Power supply circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Waveform diagram

Section Five Function Introduction to IC

3.5.1 function introduction to MT1389HD

3.5.2 function introduction to AT24C02

3.5.3 function introduction to 74HCU04

3.5.4 function introduction to Lm1117

3.5.5 function introduction to 29LV160BE

3.5.6 function introduction to HY57V641620HGT -7

3.5.7 function introduction to D5954

3.5.8 function introduction to 4558

3.5.9 function introduction to SN74LVC

3.5.10 function introduction to 74HCT125

3.5.11 function introduction to Cd4052

3.5.12 function introduction to SAA6588

3.5.13 function introduction to 5340

3.5.14 function introduction to TLV272

3.5.15 function introduction to Lm4880

3.5.16 function introduction to TAS5508PAG

3.5.17 function introduction to TAS5112DFD

3.5.18 function introduction to Ad7312

3.5.19 function introduction to VIPer22ADIP

3.5.20 function introduction to Hs817

3.5.21 function introduction to TL431A

3.5.22 function introduction to KA1M0880BTU

Chapter Four Disassembly and Assembly Process

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

Chapter six BOM List

104

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

Formats: #Digital video playback of DVD-Video, Super VCD and VCD formats #MPEG-4 compatibility: playback of DivX 3.11, DivX 4, DivX 5, DivX Pro and XviD formats #Playback of music discs in DVD-Audio format #Playback of musical compositions in CD-DA and HDCD formats #Playback of compressed musical files in Mp3 and CD+G formats #Playback of Karaoke-discs in DVD, VCD and CD+G formats #Playback of photo albums, recorded in Kodak Picture CD and JPEG digital formats

Audio: #192 kHz/12 bit audio D/A converter #Coaxial and optical audio outputs, providing digital sound playback in Dolby Digital/DTS/LPC formats #Coaxial and optical audio inputs, providing connection of external digital signal sources #Stereophonic audio output for connection to TV and amplifier #Integrated digital multi-channel sound decoders, providing playback of Dolby Digital and DTS audio

tracks

#Integrated Dolby Pro Logic ll decoder, providing transformation of stereophonic signal to multi-channel

one #Microphone input providing karaoke functions #Headphones output

Video: #108kHz/12 bit video D/A converter #Progressive scan(Y Pb Pr)video signal output, securing high resolution and absence of image flicker #Composite and component(Y Cb Cr), S-Video and RGB/SCART video outputs, providing advanced

switching capabilities #NTSC/PAL transcoder #Support of many camera angels, dubbed languages and subtitles #Sharpness, Gamma, Brightness, Contrast, Hue and Saturation adjustment. Miscellaneous: #Support of CD-R/CD-RW, DVD-R/DVD-RW, DVD+R/DVD+RW #FM/AM tuner with RDS support #USB port, providing playback of files of supported formats from external flash-memory devices #KARAOKE+, providing extended karaoke features #Easy to use on-screen menu in Russian #Support of Russian file names, Id3 tags and CD-text #”Memory” function which can load the last disc position on stop

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#”Capture” function, auto loading selected bookmarked image as the wallpaper #Q-Play function that will bring you to the main movie title and skip unskippable commercials #Virtual control panel function makes your control of the device much easier when playing the movie #Browser function displays information about playback modes #Auto protection of TV screen #Child lock, parental control(protection against playing undesirable discs)

2.2 Controls and functions

2.2.1 Front panel controls

STANDBY/POWER button

Press to switch the device on/into standby

Disc tray

Open/close button

Press to open/close the disc tray

PREV button

Press to playback from the previous bookmark

NEXT button

Press to playback from the next bookmark

PEW button

Press to fast reverse/radio station tuning

Forward button

Press to fast forward/radio station tuning

2.2.2 Rear panel connections

AM Antenna input

FM Antenna input

Left front speaker input(output from the build-in

SOURCE button

Press to switch between DVD-receiver/Audio

input/Tuner/Digital audio input

PLAY/PAUSE button

Press to playback/pause

STOP button

Press to stop the playback

Microphone input

VOLUME adjuster

Press to adjust volume

VFD display window

Headphones input

USB port

Right front speaker input(output from the build-

i n amplifier)

Center speaker input(output from the build-in

amplifier)

amplifier

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Subwoofer input(output from the build-in

amplifier)

Left Surround speaker input(output from the

build-in amplifier)

Right Surround speaker input(output from the

build-in amplifier)

Audio input

Stereophonic audio output

2.2.3 VFD display general view

MP3-disc

Component video output Y Cb(Pb)Cr(Pr)

Composite video output

S-Video output

SCART-type V connector

Coaxial digital audio output

Optical digital audio output

Optical digital audio input

Coaxial digital audio input

CD-, VCD- or SVCD-disc

DVD-disc

Repeat

AM/FM

Radio tuning mode

Tuner mode

Stereo

2.2.4 Remote control general view

EJECT button

Press to open/close the disc tray

DVD button

Press to switch to DVD mode

AUDIO button

Press to display the disc information

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Dolby Digital

Programmed radio station

Friquency

Playback time

Chapters or tracks

Playback or pause

PBC

DISP button

Press to display the disc information

LANG button

Press to change the language

SLEEP button

Press to turn the sleep mode on

Q-PLAY button

Press to turn the Q-Play mode on.

EQ button

Press to adjust the equalizer

BASS +/- button

Press to adjust subwoofer

BOOST button

Press to bass boosting

BROWSER button

Press to turn on/off the browser function

JOG DIAL wheel

Functions are set manually. Default function: ZOOM

SETUP button

Press to switch to setup mode

Button

Press to capture and bookmark image for the wallpaper

Buttons

OK button

Press OK for confirmation or use it like

joystick during navigating in MENU.

MENU button

DVD-disc menu/PBC function

GOTO button

Press to playback from the target place.

Numeric buttons

ST/5.1 button

Press to switch between STEREO/5.1CH

Treble +/- button

Press to adjust the tone

ECHO button

Press to adjust the echo function of

the microphone.

MEM button

Press to memorize the point where

playback was stopped/playback from the

previously memorized point.

Press to start reverse or forward scanning.

SKIP/PRESET +/-

Press to switch between files on disc/tuned radio stations.

A-B buttons

Press to repeat the selected portion

REPEAT button

Press to repeat playback

CH +/CH - button

Press to change the acoustic channel

MUTE button

Press to turn on/off the sound

VOLUME +/- button

Press to adjust the volume

SLOW button

Press to switch to slow down the playback

PLAY/PAUSE button

Press to Play/pause the playback

STOP button

Press to stop the playback

Button

Press to trun on/off the virtual control panel

CANCEL button

Press to go one level back/cancel current operation

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HDMI button

Press to switch to HDMI mode

SUBT button

Press to change the subtitles language

ANGLE button

Press to change the camera angel

RADIO button

4.Press SETUP to exit setup menu.

Press to switch to radio mode

KARAOKE button

Press to set the karaode functions

USB button

Press to switch to USB mode

Button

Press to switch the device on/into standby

2.3 FUNCTION SETTINGS

2.3.1 Function selection and

change

Press the SETUP key to show the setup menu. You will the following image on the screen, as shown on the figure:

1.For example, if you wish to change the change

the image settings, you have to select the image item and press the OK or RIGHT key of the cursor joystick.

2.Using the jog Dial, select the desired item and

press OK or RIGHT key of the cursor joystick. For example, select the Sharpness item. Settings will appear on the screen. Then select the desired sharpness level and press OK for confirmation.

3.Press LEFT key of the cursor joystick for exit to

previous menu level.

2.3.2 Language settings

1.Menu: interface language setup #Options: Russian, English, Ukrainian #Default option: English

2.DVD-menu: selection of disc menu language

3.Soundtrack: selection of translation language #Options: Russian, English, Estonian,

Lithuanian, Kazakh, Romanian, Belarusian,

Ukrainian, Chinese. #Default: English #Selection of other languages: select the

OTHERS item using the jog Dial and press OK.

Enter the language code using the numeric

buttons and press OK. #If the language you selected is not recorded on

the DVD disc, another available language will

be used.

4.Subtitles: selection of subtitles language #Options: Off, Russian, English, Estonian,

Lithuanian, Kazakh, Romanian, Belarusian,

Ukrainian, and Chinese. #Default option: Off. #Selection of other languages: select the

OTHERS item using the jog Dial and press OK.

Enter the language code using numeric

buttons and press OK. #If the language you selected is not recorded on

the DVD disc, another available language will

be displayed.

2.3.3 Image settings menu

1.TV system: TV system selection #Options: Auto, PAL, NTSC #Default option: PAL

2.TV scan mode: scan mode selection #Options: progressive, interlaced #Default option; Interlaced #Progressive scan is transferred only via a

component video output.

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#Before switching to progressive scan, make

sure that your TV set supports this operation mode.

3.TV Format: image ratio settings #Options: 4:3 pan&scan, 4:3 letterbox and 16:9

TV. #Default option: 4:3 letterbox. #Some discs are recorded with support of only

one ratio. The selected ratio must comply with

the TV screen.

4.Video output: selection of video signal #Options: S-Video(only for DK14**SI Series),

Comp, SCART. #Default option: Comp

5.Sharpness: image sharpness adjustment #Options: High, Medium, Low #Default option: Medium

6.Gamma: adjustment of image color

temperature #Options: High, Medium Low, Off #Default option: Off

7.Brightness: adjustment of image brightness

8.Contrast: adjustment of image contrast

9.Hues: adjustment of image hues

10.Saturation: adjustment of image saturation Adjustment of image brightness, contrast, hues

and saturation: #Select the desired item of the image adjustment

section using the jog Dial. Press OK or RIGHT

key to start adjusting the relevant option #Change the option value using the jog Dial. #Upon completion press the LEFT key of the

cursor joystick to return to image setup menu.

2.3.4 Sound settings menu

1.Mixer a)Configuragion: setting of the mode conversion

of the 5-channel signal to stereo signal #Options: Stereo, 5.1 #Default option:5.1 #5.1 mode must be supported by the disc.

Number of music accompaniment channels

depends on the specific disc. #Adjustment of th4e central speaker and

surround speakers is available only if the

Configuration option is set to 5.1 position.

b)Stereo mix: playback set-up while playing the

disc with two independent audio channels #Options: L+R, L, R #Default options: L+R c)Surr.mix: set-up of surround options while

playing the stereo disc. #Options: Off, Sum. L+R,Virt.Surr. #Default options: Off d)Low band: distribution of low frequencies

through channels #Options: Front F, Center C, Surround Sr,

Subwoofer SW #Default options: Front F, Subwoofer SW. #If you want the low-frequency component of the

sound signal enter only the subwoofer channel,

select and confirm the parameter Subwoofer

SW.

e)Channel settings: separate adjusting of

volume by channels.(only for DK14**SI Series) #Select the channel you want. #Adjust the sound volume of each channel using

the wheel. #Press the OK to return to sound settings menu.

f)Delay of the channel: set-up of signal delay in

speaker channels(central, rear and subwoofer) #Using the jog Dial, select the channel for which

you want to set up the delay, and press OK for

confirmation. #Using the jog Dial set up the desired distance

from the listener to each speaker(detailed

description of this operation see on page 32).

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#Press LEFT key of the cursor joystick to return

to speaker configuration menu.

g)PRO Logic ll: function of stereo sound

conversion to 5-channel sound #Options: On, Off, Auto #Default option: Off #In Auto position, the DVD receiver determines

itself, when to use the PRO Logic ll decoder.

Some discs do not support this function.

2.Digital audio output a)SPDIF format: set-up of digital audio output

options #Options; RAW, PCM #Default options; RAW # When you select the RAW option, the not

decoded signal is transferred to the DVD

receiver’s digital outputs, the decoded signal is

transferred to analog outputs. Decoding is

performed by the built-in decoder of the DVD

receiver. This feature is meant to ensure that

signal decoding at digital outputs is performed

by an external device(e.g.an amplifier). #If you select the PCM option, a PCM coded

signal will be transferred to the DVD receiver’s

digital outputs. b)LPCM: set-up of digital audio output options to

comply with different amplifiers an d receivers #Options: 48kHz 16 bit, 96 kHz 24 bit . #Default option: 48kHz 16 bit.

3.Sound correction a)Max volume: max volume limiting(only for

DK14**SI Series) #Using the jog Dial, adjust the max volume level. #Press the LEFT key of the cursor joystick to

sound correction setup menu. b)Equalizer: equalizer modes #Options: Rock, Pop, Live, Dance, Techno,

Classic, Soft. #Default option: Off. c)Echo; echo effects #Options: Off, Concert, Living room, Hall

Bathroom Cave, Arena, Church #Default option: Off d)Tone balance: adjustment of tone balance

level.

#Adjust the tone balance level using the jog Dial #Press the LEFT key of the cursor joystick to

return to sound correction setup menu.

2.3.5 Playback settings

1.DVD Advertisment skip: skip the unskippable

block while playing a DVD disc. #Options; Yes, No #Default option: Number

#Press LEFT key of the cursor joystick to return to

speaker configuration menu.

2.VCD/SVCD

PBS menu: PBC menu on/off #Options: On, Off #Default option: On #If On option is set, while erproducing discs, a

menu will appear, in which you can select the order of playing the disc content. If the Off option is set, the reproducing of content is performed in the order, in which it is recorded on the disc.

3.Files: selection of reproduced files on the disc

#Options: Audio, Pictures, Video All types. #Default option: All types

4.Repeat: file repeat mode

#Options: Off, Single, All #Default option: Off

5.Load effect: type of transition from one JPEG

file to another #Options: Off, from top, from bottom #Default option: Off.

2.3.6 Karaoke settings menu

1.Microphone: microphone on/off #Options: On, Off #Default option: Off

2.Kar.help: karaoke-disc playback mode #Options: L Channel, R Channel, No ast, No voc #Default option: No vocal mode

3.Volume:

Microphone: microphone sound volume level #Using the jog Dial adjust the microphone

volume level.

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#Press LEFT key of the cursor joystick to return

to karaoke settings menu.

4.Echo: echo level while playing the karaokedisc

#Adjust the echo level Using the jog Dial #Press LEFT key of the cursor joystick to return

to karaoke settings menu.

2.3.7 Preference settings

1.Backlight: Selection of open/colse button LED

#Options: On, Off. #Default option: On

2.Gr.Equalizer: spectrum analyzer

#Options: On, Off #Default option: Off

2.Set password: setup of a four-digit password to change the level of age restrictions

#Default option: 7890

2.3.9 Initial setup menu

#Press the RIGHT key of the cursor joystick to

enter the initial setup menu, then select the desired item using the jog Dial and press OK key for confirmation.

2.3.10 reset to defaults

Resetting all settings and restoring default options, except age restrictions level and password

3.Background: selection of an image as TV screen wallpaper

#Options: Standard, Saved #Default option: Standard

4.Screensaver: screen saver on/off

#Options; On, Off #Default option: On

5.Jog Dial

#Options: Zoom, Step, Fast, Skip, Volume #Default: Zoom

2.3.8 Parental Control

1.Category: setup of age restrictions to prevent children from seeing undesirable discs

#Options: Any, Kid, G, PG, PG-13, PGR, R, CN-

#Default option: Any

2.3.11 Exit settings menu

#Select the exit item using the jog Dial and press

the OK to exit the menu.

2.3.12 Channel delay set-up

Set-up of time delay in the surround

channel

Usually, time delay in the Dolby digital decoding system is preset to ensure best effect while installing the Home Theater. However, in case you wish to adjust your system more precisely, please consult instructions given in this manual.

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Set up of tie delay for this device is possible

Dolby Digital Dolby Pro Logic s urround

Rear channel Stereo 20 Hz-20khz Mono channel w ith limited friquenc y range( 100 Hz-7khz)

in both Dolby Digital and Dolby Pro Logic modes..

To set the desired delay you have to know the distance from the place where you are, to the front speakers and Surround speakers as shown in Fig.1. Consult Fig.2(Dolby Pro Logic mode) and 3(Dolby Digital mode)in order to determine the distance to Surround speakers(axis Y in the figure)and the distance to the front speakers (axis X in the figure). Crossing point of those two lines on the chart will give the recommended delay value.

Set-up of time delay in the central channel

Sometimes several people are listening to the music, and the space is limited. In this case, you can install three speakers(two front ones and a central one)as shown in Fig.1 with the distance to the listener being approximately the same. The central channel delay is to be set at “0”.

Should the central speaker be in close proximity to left and right front speakers as shown in Fig.2, or the central speaker be nearer to listeners when compared with front speakers’ location, or the central speaker be nearer to the listener by 1 foot, in all these cases you may set the delay value for the central channel at 1 ms.

For instance, as shown in Fig.2, if the line C is by 1 foot shorter than the lines R and L, the delay value is to be set at 1 ms. If your sofa is broad enough, and there are several listeners sittings on it.

It makes sense to locate the speakers in one line, as shown in Fig.3 with the delay value of the central channel to be set at “0”. Finally, if it will be necessary to install the central speaker behind the left and right front speakers, the delay value shall be set at “0”.

“Night” mode

The Dolby Digital system provides an extremely broad dynamic range of playback sound-from gentle to roaring. It creates the presence effect, especially while seeing motion pictures. However, at night a powerful sound with a broad dynamic range may give pleasure to you, but disturb and annoy your family and neighbors. If you just decrease the volume, you will immediately notice that you ceased to hear, e.g., Dialogues as clear as you do at normal volume, and such sound effects as rustle, whisper etc have merely disappeared. To avoid this, you just have to decrease the volume of “loud”sounds by simultaneously increasing the volume of “soft”sounds with the volume of “average”sounds left unchanged, i.e.just decrease the dynamic range of sound accompaniment. Only Dolby Digital system provides for such a method of sound control. It uses the principle of compressing the acoustic signal’s dynamic range while recording; therefore, while playing an inverse transformation(volume expansion)takes place. This is called”night”mode. The regulation limits are restricted, however, to avoid distortions of resultant signal.

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multivar iate From left to r ight, from right to left, f rom front to r ear,

fr om rear to fr ont

Low-frequency

Playback disc s

Input

Output Audio output

Analog audio output: Stereo Digital audio output: Coaxial, Optical

Video char acteris tics

Audio char acteris tics

Operating voltage Power consumption

FM Tuner

Frequency r ange Channel separation

AM Tuner Frequency r ange

DVD receiver

~220V,50/60 Hz 250W

87.5-108 MHz >35dB

522-1611kHz

DV D-V ide o, Super V CD, V CD, Div X 4 , Div X 5 , Di v X Pr o, Xv iD, CD-DA , CD+G, HDCD, MP3, W MA, K odak Pi ctu re CD, JPEG

2 MIC jacks FM antenna input AM antenna input Stereo audio input(AUX)

Video amplitude: 1.0Vp-p(75Ù) S-Video amplitde: Y:0.7vP-P(75Ù) Component video amplitude: C:0.286vP-P(75Ù)

1.0vP-P(75Ù)

Frequency r esponse 20- 20000Hz(±1 Db) Signal-to-noise ratio >90(dB) THD <1 %

channel(subwoofer)

Sound field distribution

Available, 20-120Hz

N/a

Sound field distribution

Miscellaneous

6 Independent channels, each reproducing its own signal at a time

Creates an optimum sound field with illusion of an equal distance from listener to each speaker.

Allows adjusting the decompression degree of an equal distance from listener to ecach speaker.

Possilility of programmable control of the decoder to transfer basses into low-frequency channel in systems equipped with broad-band speakers and a subwoofer.

Undoubted progress in sound recording technology, especially important for program directors, film directors, sound engineers and actors.

2.4 Technical characteristics

4 segmented channels. Only one channel is decoded at a time.

The most cost-efficient way to ensure high-quality surround effect.

Surround sound may be received from any signal source.

Compatible with existing and future two-channel(stereo)formats.

Big progress in comparison with conventional stereo, the world's most popular surround format.

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Speaker sys tem

Output pow er RMS, 10% THD, 1 kHz Subw oofer (40Hz) Front channel Rear channel Center channel

Maximum power Subw oofer Front channel Rear channel Center channel

Operating temperature

Operating humidity

Dimensions of DVDreceiv er

Weight of DVDreceiv er

Dimensions of speakers

Subw oofer Front channel Rear channel Center channel

DK1110SI DK1112SI DK1114SI 25 25 25 12 12 12 12

40 50 50 20 20 20 20 20 20

DK1110SI DK1112SI DK1114SI 325×310×200 325×310×200 325×310×200 80×101×165 80×101×165 150×90×86 80×101×165 80×101×165 150×90×86 80×

5-35

15-75%(no c ondensation)

60×380×350mm

3.4kg

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ChapterThreePrincipleandServicing

SectionOnePrincipleofthePlayer

3.1.1 Function and features

# Progressive scanning output to produce steadier and clearer pictures without flickering.

Composite video, S-video, component video output.

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

pictures, gamma correction.

Built-in Dolby digital decoder. Karaoke function.

Hi-Fi stereo headphone output. 5.1CH output.

Power amplifier adopts high performance large power IC with complete protection function and

perfect sound quality.

Compatible with DIVX, MPEG4 format disc.

Subwoofer adopts large diameter bass unit matched with large capacity speaker body.

3.1.2 Bl

Its internal structure is mainly composed of decode & servo board, power amplifier board,

input/otuput board, panel, headphone board, tuner, power board and loader. The principle block diagram

is shown as the figure 3.1.2.1. All other signal flow is shown in figure except power board. The function

of loader is to read disc information and transmit it to Mt1389, which performs servo function through

D5954 on decode board and other supplementary circuit, and ensues the normal working of loader.

FLASH on decode board is to store system program, SDRAM is to store program and sound/image

information read from disc when the player is working to ensure their smooth output. The main function

of power amplifier board is to perform audio D/A conversion, amplify analog signal and output 5.1CH to

ensure the normal working of external speakers. The main function of AV board is to output various

audio signals. This player is also with headphone and microphone to meet customers’ demand. Further

more, it also has external sound input, which may amplify power by use of power amplifier board of this

ock diagram of the player

player to output to speaker. Tuner in this player makes it have tuning function. It is also equipped with

SAA6558 chip to realize RDS function of Europe and RBDS function of US.

- 15 -

ROUTX

L R

LOUTX

SCART

Cr/Cb Pr/Pb

Video S-video

VIDEO COMP

VEDIOC VIDEOY

Optial

Coaxial

Filtering

Front

Rear

L R

SLOUT

Rear

SROUT

Woofer

SW+ SW-

Center

CEN

Front

FROUT

FLOUT

CD4052

N13

TAS5112

N11

LM4880

N12 TAS5508

SDAT A0 SDAT A1 SDAT A2

XS301

D5954

U201

MT1389HD

N14

TAS51 12

DAVNIN

Amplifying circuit N8, N9 (TLV272)

SDA AD

ADC DAT

Y1 Y2 Y3 Y4 Y5 Y6

SPDIF

URST#

CS5340

Filtering

AUXR

AUXL

TUL

TUR

Amplifying circuit

N1 4558

SAA6558

Reset circuit

MIC 1

MIC 2

PDS MPX

Tuner

MIC

External audio input

- 16 -

Figure 3.1.2.1 Block diagram of the player

Loader

Headphone

HDET

VFD screen

CLK

STB SDA

N101

AD7312

Button

N102

REMOT

IR receiver

U214

FLASH

U211

SDRAM

3.1.3 Introduction to IC used in this player

PCB sem i-finishe d

product name

IC model Locat ion Function

MT1389HD U201 Decode chip

24C02 U202 EEPROM

RT9701 U203

HCU04 U205 Phase inverter

LM1117 U209 Precision voltage stabilizer

HY57V641620HGT-7 U211 64M SDRAM

29LV160BE U214 16M FLASH

D5954 U302 Servo drive

4558 N1 Audio amplifying

SN74LVC N2 Phase inverter

74HCT125 N3,N4 Buffe r

CD4052 N5 Audio mixing

SAA6588 N6 Tuning IC

CS5340 N7 A/D conversion

TLV272 N8,N9 Operational amplifier

LM4880 N11 Audio amplifying

TAS5508PAG N12 Pulse width adjuster

TAS5112DFD N13,N14 Digital power amplifier

PT2597 N15

AD7312 N101 Panel control IC

REMOT N102 Remote control receiver

VIPER22 U501 Power switch IC

HS817 U502,U506 Photoelectric coupler

TL431 U503,U507 Precision voltage stabilizer

LM7805 U504 Voltage stabilizing tube

KA1M0880BTU U505 Power switch IC

decode board

Power a mplifie r

board

Powe r boar d

Main pa nel

Introduction to IC used in DK1910SI is shown in the following table:

- 17 -

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

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:

- 18 -

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

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 MDI I 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

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.

- 19 -

3.2.2 Servo circuit

1. DK1910S adopts SANYO 62 decoder and MTK decode solution (MT1389+FLASH

(16M)+SDRAM (64M)). The servo circuit is mainly composed of front signal processing, digital servo

processing, signal processing IC T1389 and drive circuit D5954, in which MT1389 is the main

component of decode circuit at the same time, shown as the figure 3.2.3.1:

Loader

Feed electric machine on loader

Disc in/out electric machine and detecting switch

DVD laser power control

VCD laser power control

Disc identification circuit

Main axis braking circuit

Disc in/out circuit

Main axis electric machine on loader

Integration circuit

Figure 3.2.2.1 Servo circuit diagram

2. Working principle: after powering on or disc in, according to IOA signal, disc identification circuit

decides through which path of variable resistor the laser detecting diode gets path to the ground,

meanwhile MT1389 decides whether DVD laser or VCD laser is emitted according to IOA signal, which

can be fulfilled through laser power control circuit. When IOA is high level (3.3V), Mt1389 pulls LOD1 of

V302 base electrode in laser tube power control connected to VCD down to about 2.2V to make V302 on

and to make VCD laser tube emit beam; then decides whether to pull up or pull down LOD1 according to

voltage after the feedback from MDI1 to control the power of light emission diode. Similarly, when IOA is

low level (0V), MT1389 pulls LOD2 of V301 base electrode in laser tube power control connected to

- 20 -

DVD down to about 2.2V to make V301 on and to make DVD laser tube emit beam; then decides

whether to pull up or down LOD2 according to the voltage after the feedback from MDIAfter loader

reading disc information, A, B, C, D, E, F signals are 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.

After being processed by digital servo signal circuit inside MT1389, one part of signal form

corresponding servo control signals and output FOO, TRO, DMO, FMO digital servo control signals from

pin 42, pin 41, pin 37, pin 38 of Mt1389 respectively, then change into analog servo control signal FOSO,

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

circuit BA5954 for amplification to bring along focus coil, trace coil, 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 pick-up 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 readingDVD signals, these

signals are conducted ESM demodulation inside MT1389, and then sent to latter stage for decoding

after finishing RSPC error correction inside.

The other part of servo is open/close disc tray circuit. After panel or remote controller emits

open/close disc tray signal toMT1389, in usual conditions, TROPEN and TRCLOSE sent out by pin 39,

51 of Mt1389 are both low level, when signal of “open” comes, after Mt1389 makes disc stop rotating

through main axis braking circuit, TRCLOSE is set high to make open/close electric machine on loader

frame run to bring along dist tray to eject. After disc tray ejecting to proper Signal of opening to proper

position (TR_OUT) is set high level (0V) through the detecting switch on loader frame, MT1389 pulls

down TRCLOSE and open/close electric machine stop running. When MT1389 receiving “close” signal,

TROPEN is set high level by MT1389, open/clode electric machine tuns conversely to bring along disc

tray to close. After disc tray closing to proper position, signal of closing to proper position (TR_IN) is set

low level through the detecting switch on loader frame, MT1389 pulls down TROPEN and electric

machine stops running to finish “close” process.

3. Explanation to servo terms

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

laser emitted by pick-up cannot justly fall on data pit of disc, so pick-up is required to move upwards or

- 21 -

Downwards to make focus aim at data pit justly. When pick-up is moving upwards or downwards, it

Name

When reading

disc nor mally

When disc out When disc in

When no disc

TRO PEN 0

There is about 1 sec ond 3.3V pulse

w hen at the moment of dis c out

0 0

TRCLO SE 0 0V

There is about 1 sec ond 3.3V pulse w hen

at the moment of dis c out

TROUT 3.41V 3.3V 0V 0V 3.3V 3.3V

TRIN 0 0V 3.3V 3.3V 0V 0

OPO 2.61V 2.75V 2.64V 2.61V

ADIN 2.61V 2.76V 2.61V 2.61V

OP+ 1.66V 1.81V 1.27V 1.81V

OP- 1.85V 2.12V 1.47V 2.04V

means that pick-up is making focus acts.

TRO: data information is save in disc in form of tracks. The process when pick-up moves from one

track to another one to read data is trace. In this process, it is objective, but the entire pick-up, that

moves forwards or backwards, and the moving range is very small.

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.

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.

Hint: In order to observe these processes, you may take down upper cover of the machine, and then the

loader cover board. When power on with no disc in or disc in after disc out, you may observe that pick-up

returns to inner ring firstly and then springs back for a little distance, which is feed process. Then pick-up

will emit light and you may notice the objective moves upwards and downwards, which is focus process.

In face, in the same time of focus, the objective also moves upwards and backwards to make trace acts.

Because the range is small, it is not easy to observe, and meanwhile DEMO disc tray also rotates

slightly, which is DEMO acts.

4. Voltage of key point is shown as follows:

- 22 -

3.2.3 Main axis braking control circuit

1. Main axis braking control circuit is shown as the following figure 3.2.3.1:

Figure 3.2.3.1 Main axis braking control circuit diagram

The equivalent circuit is shown as the following figure 3.2.3.2:

Figure 3.2.3.2 Main axis braking control equivalent circuit diagram

Internal processing

2. Working principle: To prolong the service life of electric machine and decrease the influence of

start-up concussion current to the machine, when there is disc in, the development personnel design the

main axis electric machine in running state always. Even though “STOP” button is pressed, disc will not

stop running immediately. Thus when pressing “OPEN” button, a braking signal is required to make the

main axis electric machine stop running to fulfill the completion of opening disc tray in a short period.

- 23 -

In the course of playback, press “OPEN" button and main axis drive signal disappears. For the

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

SP+ Pin 11 of D5954, pin 5 of XS303 3.79 3.79 0.70 1.80

SP- Pin 12 of D5954, pin 6 of XS303 1.38 1.38 3.40 1.80

OP+ Pin 36 of MT1389/B 1.38 1.38 3.10 1.80

OP- Pin 35 of MT1389/A 1.53 1.53 3.08 1.98

OPO Pin 34 of MT1389/C 2.44 2.44 0.40 2.50

ADIN Pin 47 of MT1389/D 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

reason of inertia, the main axis electric machine is still in running state, and now the induced voltage

achieved by the induced electromotive force which is generated by electric machine's running on

sampling resistor R321 and R340 outputs from pin 34 through resistor R319, R320 and pin 35, 36 of

MT1389 after being processed inside MT1389 and magnified, then sends to pin 50 of MT1389 through

R13; after A/D conversion and the corresponding processing inside MT1389, an instant electric machine

reversal braking signal is outputted from pin 37 of MT1389 to make the main axis electric machine

decrease speed. When MT1389 detects the disc stops running, disc tray will open to ensure that disc

will not run when disc tray opens.

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

3.2.4 Disc identification circuit

1. Disc identification circuit is shown as the following figure 3.2.4.1:

Loader

Figure 3.2.4.1 Disc identification circuit diagram

- 24 -

2. Working principle: the function of disc identification circuit is to identify the disc inserted to loader

and judge whether the disc is VCD or DVD to perform the corresponding control acts. When disc is

inserted in, decode servo control IC MT1389 defaults disc to DVD. Pin 112 of MT1389 outputs a low

voltage signal, V305 and V304 are cut off, V303 is on, laser receiver tube inside loader selects DVD

channel, now IOA is low level input loader to make loader in the state of reading DVD, through detecting

laser power feedback signal, MT1389 analyses whether the preliminary judgment is correct (disc is

defaulted DVD). When detecting correct preliminary judgment, loader runs in the state of reading DVD;

when detecting incorrect preliminary judgment, MT1389 outputs a high voltage signal from its pin 112,

V305 and V304 are on, V303 is cut off, laser receiver tube inside loader selects VCD channel, now IOA

is high level input loader to make loader in the state of reading VCD. Whether the preliminarily defaulted

disc is VCD or DVD is set by MT1389 internal software.

Note: V303 and V304 are MOS tube.

3.2.5 Disc in/out circuit

1. Disc in/out circuit is shown as the following figure 3.2.5.1:

VCC

TC308 47uF/16V

LOAD-

(TRCLOSE1)

TROPEN

R323

1.5K

R325 470R

R326

2.2R\1/4W

V306 8550

V307 8050

Figure 3.2.5.1 Disc in/out circuit diagram

V309 8550

V308 8050

V310

9014-S

R324

1.5K

R327 470R

TC309 47uF/16V

R339

10K

LOAD+

(TROPEN1)

TRCLOSE

(TRCLOSE1)

TROPEN

2. Electric current when disc in/out

Open disc tray: VCC V306CE electrode on LOAD+ Electric machine LOAD- V308CE

electrode on R326 Ground

When not opening disc tray, pin 54 and 39 of MT1389 are low level. When opening disc tray, pin 54

of MT1389 sends a high level; V308 is on; V308 collector electrode changes into low level; LOAD-

changes into low level; V306 base electrode changes into low level; V306 is on. V306 collector electrode

changes into high level and LOAD+ changes into high level.

Close disc tray: VCC V309CE electrode on LOAD- Electric machine LOAD+ V307CE

electrode on R326 Ground

- 25 -

When closing disc tray, pin 39 of MT1389 sends a high level; V307 is on; collector electrode

Key point Position Voltage Remark

DV33 (point A) Diode VD201 cathode 3.3V

TC217 may sends out c urrent f rom this point

after pow er failure

changes into low level; LOAD+ is low level; base electrode through R324 and V309 is low level; V309 is

on; V309 collector electrode changes into high level; LOAD- changes into high level.

The function of V310 is interlock TRCLOSE and TROPEN signal to ensure the two are not high level

at the same time. When the two are high level input, base electrode of V308 is made to low level through

V310 on to ensure the normal working of disc in/out circuit. The function of electrolytic capacitor TC309

and Tc308 is to avoid the sudden change of the voltage on two ends of disc in/out electric machine to

make disc in/out acts smooth.

3.2.6 Reset circuit

1. Reset circuit is shown as the following figure 3.2.6.1:

DV33

R252 75K

R253

0R(DNS)

VD201 1N4148

R236

TC217 47uF/16V

Q204

9015

R254

47K

5 6

C278 225

U205C HCU04

R256 33R

URST#

Figure 3.2.6.1 Reset circuit diagram

2. Working principle: The two ends voltage of capacitor T217 cannot change suddenly, anode of the

capacitor begins charging from 0V and now triode Q204 is on. Pin 5 of phase inverterU205 (HCU04)

output port is high voltage and pin 6 of it is low voltage to reset chip MT1389 FLASH, TAS5508 and

Cs5340. When charge of the capacitor is close to 3.3V, triode Q204 cut off; pin 5 of phase inverter input

port is low level; phase inverter outputs high voltage from pin 6 and MT1389 reset finishes. After reset of

MT1389, reset signal is also given to sound D/A conversion chip CS4360 and sound A/D conversion

chip CS5340V for their resetting. In the course of system working, pin 214 of MT1389 outputs reset

signal to reset TAS5508 and CS5340 on power amplifier board.

3. Key point voltage is shown as the following table:

- 26 -

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