BBK DK1110SI Service Manual

DK1110SI

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 Setlist

2.4 FUNCTION SETTINGS

2.4.1 Function selection and change

2.4.2 Language settings

2.4.3 Image settings menu

2.4.4 Sound settings menu

2.4.5 Playback settings

2.4.6 Karaoke settings menu

2.4.7 Preference settings

2.4.8 Family filter settings

2.4.9 Initial settings menu

2.4.10 Reset settings to default

2.4.11 Exit settings menu

2.4.12 Channel delay set-up

2.5 Technical characteristics

Section One Principle of the Player

3.1.1 Features of the player

3.1.2 Block diagram of the player

Section Two Unit Circuit Principle

3.2.3 Mute circuit

3.2.8 Panel control components

Chapter Three Principle and Servicing

3.1.3 PCB board composition diagram of the player

3.1.4 Introduction to IC used in this player

3.2.1 Loader signal explanation

3.2.2 Servo circuit

3.2.4 Open/close door circuit

3.2.5 Reset circuit

3.2.6 Main axis braking control circuit

3.2.7 Disc identification circuit

3.2.9 Video circuit

3.2.10 Input/output circuit

3.2.11 Audio power amplifying circuit block diagram

3.2.12 Power circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2 Troubleshooting flow chart

Section Four Signal waveform diagram

Section Five Function Introduction to IC

3.5.1 function introduction to MT1389E

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 Cd4094

3.5.8 Function introduction to D5954

3.5.9 function introduction to 4558

3.5.10 function introduction to M62429

3.5.11 function introduction to TDA8947J

3.5.12 function introduction to 4580

3.5.13 function introduction to 5340

3.5.14 function introduction to Pt2314

3.5.15 function introduction to Pt6961

3.5.16 function introduction to KA5L0380R & KA1M0880BTU

3.5.17 Function introduction to HS817

3.5.18 Function introduction to TL431A

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

Compatible Disc Types: #Digital video playback DVD-Video, Super VCD, VCD compatibility. #MPEG-4 standard support: compatibility with DivX3.11, DivX5, DivX pro, XviD compressed video filies. #Digital audio playback: CD-DA and HDCD compatibility. #Fully compatible with compressed audio files such as Mp3 and WMA #Playback of DVD, VCD, CD+G karaoke discs. #Digital graphic albums playback: Kodak picture CD, JPEG compatibility.

Audio: #192KHz/24 bit Audio Digital/Analog converter. #Coaxial and optical outputs for Dolby Digital/DTS/LPCM digital audio. #Mixed audio output for amplifier of TV connection #Stereo signal input for external signal connection. #Digital multi-channel decoders, providing Dolby Digital/DTS audio stream playing . #Built-in Dolby Pro Logic ll decoder makes available to convert stereo signal into multi-channel. #Dual-channel MIC inputs for karaoke function #Headphones output

Video: #108MHz/12 bit Video Digital/Analog converter #Progressive Scan Output(Y Pb Pr) producing flicker-free and stable images #Composite, component(Y Cb Cr), S-Video and RGB/SCART outputs for various types of connections #NTSC/PAL transcoder #Multiple dubbings, angles, subtitles support. #Sharpness, gamma, brightness, contrast, hue , saturation adjustment.

Others: #Compatible disc types: CD-R/CD-RW, DVD+R/DVD+RW #Built-in digital FM/AM tuner with 20 radio stations memory #KARAOKE+ system expanding karaoke function #Russia, CIS and Baltic States adaptation interface and filenames, ID3-tags and CD-Text support

simplifies device operation. #”Memory” function enables to save the last point after stop playback. #:Q-Play” function provides direct playback and allows to skip commercial that is not possible to rewind. #”Virtual keyboard” function provides more convenient DVD playback control. #”Browser” function provides easy access to playback control. #Automatic screensaver function #Parental control function to protect children from watching inappropriate discs.

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2.2 Controls and functions

2.2.1 Front panel controls

STANDBY/POWER button

Press to switch the device on/into standby.

Disc tray

VFD display window

Infrared sensor

OPEN/CLOSE button

Press to open/close the disc tray.

PLAY/PAUSE button

Press to playback/pause

STOP button

Press to stop the playback

2.2.2 Rear panel connections

SOURCE button

Press to switch between DVD-receiver/Audio

Input/Radio

VOLUME adjuster

Press to adjust volume

REW button

Press to fast reverse

Forward button

Press to fast forward/radio station tuning

Dual-channel MIC Inputs

Headphones outputs

Right front speaker input(output from the built-

in amplifier)

Left front speaker input (output from the built-in

amplifier)

Center speaker input(output fro the built-in

amplifier)

Right Surround speaker input(output from the

built-in amplifier)

Left Surround speaker input(output from the

built-in amplifier)

Subwoofer input(output from the build-in

amplifier)

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FM Antenna input

AM Antenna input

Audio input

Stereo audio output

Coaxial digital audio output

Component video output Y Cb(pb)Cr(pr)

Optical digital audio output

S-Video output

Composite video output

SCART

2.2.3 VFD display general view

Playback/pause

DVD-disc

CD-disc

DTS

Mp3

2.2.4 Remote control general view

Dolby Digital

Repeat

Stereo

Friquency

Universal letter-digital indicator

EJECT button

Press to open/close the disc tray.

LANG button

Press to change language.

NEM button

Press to memorize the point where playback was

stopped/playback fro the previously memorized point.

DISP button

Press to display the disc information

Numeric buttons

BROWSE button

Press to turn on/off the browser function.

CURSOR buttons

SETUP button

Press to switch to setup mode.

Button

Press to start rewind/rewind scanning.

KARAOKE button

Press to set the karaoke functions.

Button

Press to stip backward

Button

Press to skip backward

REPEAT button

Press to repeat playback

A-B button

Press to repeat the selected protion.

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Button

Press to turn on/off the sound.

VOLUME+/- button

Press to adjust the volume.

SOURCE button

CANCEL button

Press to go one level back/cancel current

operation

Ok button

MENU button

Press to change the DVD/RADIO/AUX mode.

Button

Press to skip forward

Button

Press to stop the playback.

Button

Press to start forward/ffoward scanning

Button

Press to normal playback/pause

ZOOM+/- button

Press to zoom in/out

2.3 Setlist

DVD receiver Speakers Subwoofer Audio/Video Cord 2xRCA-Mini-Jack audio cord Speaker cord FM Antenna AM Antenna Remote control AAA size battery Warranty card User manual DM-998 microphone Karaoke disc

1PCS 5PCS 2PCS 1PCS 1PCS 6PCS 1PCS 1PCS 1PCS 2PCS 1PCS 1PCS 1PCS 1PCS

2.4 FUNCTION SETTINGS

2.4.1 Function selection and

change

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

Select the desired menu item using the UP/ DOWN buttons button; Press the OK key for confirmation.

DVD disc menu/PCB function

ANGEL button

Press to change the camera angel/change the

Mp3 and JPEG files playback mode

Q-PLAY button

Press to turn the Q-Play mode on.

SUBT button

Press to change the subtitles language/change

the playback mode of Mp3 and JPEG files.

Button

Press to switch the device on/into standby.

1.For example, if you wish to change the image settings, you have to select the image item and press the OK or RIGHT key.

2.Using the UP/DOWN buttons, select the desired item and press OK or RIGHT button. For example, select the Sharpness item. Settings will appear on the screen. Then select the desired sharpness level and press OK for confirmation.

2.4.2 Language settings

1.Menu: inteerface language set-up

#Options:Rusian, English, Ukrainian #Default option: Englis

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2.DVD-menu: selection of disc menu language

3.Sound: selection of translation language #Disc menu/translation language options:

Russian, English, Estonian, Lithuanian, Kazakh, Romanian, Belarusian, Ukrainian, Chinese.

#Default menu/translation language option:

English.

#Selection of other languages: select the

OTHERS item using the wheel 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 wheel 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.

2.4.3 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.

#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, Comp, RGB. #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.

7.Brighteness: adjustment of image brightness

8.Contrast: adjustment of image contrast

9.Hues: adjustment of image hues

10.Satruation: adjustment of image saturation

Adjustment of image brightness contrast, hues and saturation: #Select the desired item of the image adjustment

section using the UP/DOWN buttons. Press OK or RIGHT key to start adjusting the relevant option.

#Upon completion press the LEFT button of the

UP/DOWN buttons to return to image setup menu.

2.4.4 Sound settings menu

1.Mixer a)Cofiguration: setting of the mode for

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 the 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+RR, L, R.

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#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: Sum. L+R, 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.

#Select the channel you want to adjust using the

cursor buttons.

#Adjust the sound volume of each channel using

he cursor buttons. #Press the OK key 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 button of the cursor buttons, select

the channel, for which you want to set up the delay, and press OK for confirmation.

#Using the cursor buttons set up the desired

distance from the listener to each speaker(detailed description of this operation see on page 32).

#Press the LEFT button 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 and receivers. #Options: 48 kHz 16 bit, 96kHz 24 bit. #Default option: 48 kHz 16 bit.

3.Sound correction A)Max volume: max volume limiting #Using the cursor buttons, adjust the max

volume level. #Press the LEFT key to return to sound

correction set-up menu. b)Equalixer: equalizer modes #Options: Off, rock, pop, live sound, dance

music, techno, classics, soft sound. #Default option: Off. c)Echo: echo effects #Options: Off, concert, living room, hall,

bathroom, cave, arena, cathedral. #Default option: Off. d)Tone balance: adjustment of tone balance

level. #Adjust the tone balance level using the cursor

buttons. #Press the LEFT button to return to sound

correction set-up menu.

2.4.5 Playback settings

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1.DVD Advertisment skip: skip the unskippable

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

2.VCD/SVCD PBS menu: PBC menu on/off

#Options: On, Off. #Default option: On. #If On option is set, while reproducing 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. #Default option: A.P.V.

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

2.4.6 Karaoke settings menu

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

2.Kar.help: karaoke-disc playback mode #Options: channels L, channels R, No ast, No

voc. #Default option: Without solo.

4.Echo: echo level while playing the karaokedisc

#Adjust the echo level Using the cursor buttons. #Press the LEFT button to return to karaoke

settings menu.

2.4.7 Preference settings

1.Equalizer: spectrum analyzer

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

2.Sccreensaver: screen saver on/off

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

2.4.8 Family filter settings

1.Category: set-up of age restrictions to prevent children fro seeing undesirable discs.

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

17.

#Default option: Any.

2.Change password: set-up of a four-digit password to change the level of age restrictions.

#Default option: 7890

3.Volume: Microphone: microphone sound volume

level. #Using the wheel adjust the microphone volume

level.

#Press the LEFT button to return to karaoke

settings menu.

2.4.9 Initial settings menu

#Press the RIGHT key to enter the initial settings

menu, then select the desired item using the cursor buttons and press OK key for confirmation.

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#While being in this menu section, you cannot

return to the previous level by pressing the LEFT key.

2.4.10 Reset settings to default

Resetting all settings and restoring default

options, except age restrictions level and password.

2.4.11 Exit settings menu

#Select the exit item using the UP/DOWN

buttons and press the OK key to exit the menu.

2.4.12 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. Set up of time delay for this device is possible 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, of 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 you sofa is broad enough, and there are several listeners sitting 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”.

2.4.13 “Night” mode He 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.

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To avoid this, you just have to decrease the

Dolby Digital Dolby Pro Logic surround

Rear channel Stereo 20 Hz-20khz

Mono channel with limited friquency range(100 Hz-

7khz) Low-frequency channel(subwoofer)

Available, 20-120Hz N/a

Sound field distribution multivariate From left to right, from right to left, from front to rear,

from rear to front

Channels

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

4 segmented channels. Only one channel is decoded at

a time.

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

The most cost-efficient way to ensure high-quality

surround effect.

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

Surround sound may be received from any signal

source.

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

Compatible with existing and future two-

channel(stereo)formats.

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

Big progress in comparison with conventional stereo,

the world's most popular surround format.

Miscellaneous

Playback discs

Input

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

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

DVD receiver

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.

2.5 Technical characteristics

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Output Audio output

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

Video characteristics

Audio characteristics

Operating voltage Power consumption

FM Tuner

Frequency range Channel separation

AM Tuner

Frequency range

Speaker system

Output power RMS, 10% THD, 1 kHz Subwoofer(40Hz) Front channel Rear channel Center channel

Maximum power Subwoofer Front channel Rear channel Center channel

Operating temperature

Operating humidity

Dimensions of DVD-receiver

Weight of DVDreceiver

Dimensions of speakers

Subwoofer Front channel Rear channel Center channel

40 50 50 20 20 20 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 80 101 165 80 101 165 150 90 86

5-35

15-75%(no condensation)

60×380×350mm

3.4kg

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

1.0vP-P(75 ) Cb/Cr:0.7Vp-p(75 )

Frequency response 20-20000Hz( 1 Db) Signal-to-noise ratio 90(dB) THD 1%

~220V,50/60 Hz 250W

87.5-108 MHz >35dB

522-1611kHz

DK1110SI DK1112SI DK1114SI 25 25 25 12 12 12 12 12 12 12 12 12

DVD receiver

#We are permanently improving the quality of our products; hence the product’s design, functionality

and technical characteristics may be modified without prior notice.

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

and recording format.

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Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Features of the player

Progressive scanning output to produce steadier and clearer pictures

Composite video, S-video and component video output. 5.1CH output

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

pictures, gamma correction

Karaoke function. Built-in Dolby digital decoder

Hi-Fi stereo headphone output

FM/AM digital tuning function, capable of storing (memorizing) 20 FM/AM radio stations each

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

perfect sound quality

Compatible with DIVX, MPEG4 format movie

Subwoofer adopts large-diameter bass unit with large-capacity body, with deep and dynamic

bass effect

3.1.2 Block diagram of the player

This player is composed of decode & servo board, power amplifier board, input/output board, panel,

headphone board, tuner, power board and loader. Block diagram of the player is shown in the figure

3.1.2.1. Except that power board is not shown, other signal flow is shown in the figure basically. Main

function of loader is to read disc information and transmit to MT1389E, MT1389E fulfils servo function

through Ba5954 on decode board and other subsidiary circuit; and ensures normal working of loader

through other circuits. FLASH on decode board is to save system program, SDRAM is to save program

when the player is working and read sound and picture information from disc to ensure smooth output.

The main function of power amplifier board is to perform DA conversion and amplification of analog

signals to output 5.1CH and ensure normal working of external speaker. The main function of AV board

is to output various audio and video signals. This player is also with headphone and microphone to meet

client’s requirements. In addition, there is external sound input , power amplifier board of this player may

be used to amplify power to facilitate to output to speaker. Tuner in this player also makes it have tuning

function.

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Composite video

Coaxial

OpticalS-video

Cr/Pr Cb/Pb AUX-in

MIX-out

Tuner

Gating signal

Disc data/laser power control identification

Mute control signal

SCART

2DK1110

CD4094

D5954

Main axis/focus/trace/feed

Loader

COMP

SDATA0 VSDA/DTSDI VSCK/DTSCL

SPDIF

MT1389E

Data/address line

FLASH

24C02

SCL

SDA

1DVR938-3

Data/ address line

Add/LPF/amplifying

M62429

SW3

LPF/ amplifying

SL/SR/C

LO/RO

LPF/amplifying

LF/RF

SDRAM

AUXR/AUXL

Add/LPF/amplifying

TROUT/TLOUT

LRSWM

De-decode board

board

De-power amplifier

VSTB

board

De-power amplifier

De-panel

PT2314

D+3.3V

-12V

A+5V

Voltage stabilizing the second time

+12V

+22V

D+5V

CS5340

Voltage stabilizing and filtering

sampling

Sampling

Voltage stabilizing and filtering

LRSWMUT/SCMUT

MIC1/MIC2

Photoelectric coupler

Transformer

Photoelectric coupler

Transformer

4DK1110

TDA8947

LM4580

TDA8947

Mute control circuit

SWOUT+ SWOUT-

LOUT

ROUT

Mute

HL/HR

SROUT

COUT

SLOUT

SCM

12V1

- 15 -

Figure 3.1.2.1 Block diagram of the player

5L0380

KAIM0880

~220V

rectification

Bridge

BDK1 110

Headphone socket

6DK1110

SN1692

Digital potentiometer

9DK1110

MIC socket

MIC board

Headphone board

X100

MIC1

AGND

MIC2

X110

AGND

HDET

XS101

SDA

SCL

12345

+12V

+5VROAGNDLOAGND

SBCLK

SLRCLK

SCMUT

GND

+12V

TLOUT

AGND

TROUT

DTS_CE

DTS_DL

DTS_CL

DTS_DO

DGND

P_RST

SCL1

LRSWMUT

SDAT

GND

SMCLK

GND

12345

+12V

TLOUT

AGND

TROUT

DTS_CE

DTS_DL

DTS_CL

DTS_DO

DGND

Speaker

Tuner

XP102

AUXR

MIC1

AGND

X100

MIC2

AGND

X110

HDET

DV33

CON7

DGND

+5V

XP100

-12V

AGND

+12V

PVCC

GND

PVCC

GND

123

Power amplifier board

XS601

AGNDRC

GND

AUXL

XS100

DTS_CE

AGND

HDET

OK-DAT

DTS_DO

DTS_CL

DTS_DI

GNDP-

XS503

XP203

XS303

XS302

123

P+28V

GNDP-

P+28V

D+5V

D-GND

D+3V3

A-GND

A+5V

SL+

SL-

LIMIT

GND

SP+

SP-

LO-

LO+

TRO

GND

TRI

VCC

GND

DV33

GND

AVCC

24PIN

SL+

SL-

LIMIT

GND

SP+

SP-

LO-

LO+

TRO

GND

TRI

+5V

GND

XP203

XS301

XS303

XS302

XS100

AGND3RC

AGND

GND

Decode board

Front panel

SDA

HDET

OK-DAT

XS207

AGND

GND

SBCLK

SLRCLK

SCMUT

SCL

XS206

XS202

12345

P_RST

SCL1

SDAT

GND

SMCLK

LRSWMUT

R/Y

B/C

GND

CVBS

GND

B/C

R/Y

HSYNC#

VSYNC#

VDATA3

GND

IEC958

Dv33

RXD

TXD

GND

+12V

D+5V

AGND

XP401

AGND

AUXR

AUXL

GND

HSYNC

VSYNC

VDATA3

GND

SPDIF

XP206

Software upgrading

- 16 -

Input/output board

Figure3.1.2.1PC Bboard block diagram of the player

DTS_CE

DTS_DO

DTS_CL

DTS_DI

XS201

VSTB

VSDAJ3J4

VSCK

12345

CLOCK

STB

DATAJ3J4

XS101

123

A+5V

A-GND4A+5V

A-12V

A-GND7A+12V

XS504

D-GND

D+5V

FL+

FL-

-21V

XS505

Power board

Loader

Loader board

3.1.3 PCB board composition diagram of the player

PCB board composition diagram of the player is shown in the figure 3.1.3.1:

3.1.4 Introduction to IC used in this player

PCB semi-finished

product

IC model Location Function

MT1389E U201 Decode chip

24C02 U202 EEPROM

HCU04 U205 Phase inverter

LM1117 U206 Precision voltage stabilizer

29LV160BE U207 16M FLASH

HY57V641620HGT-7 U208 64M SDRAM

CD4094 U213 Serial and parallel connection conversion

D5954 U301 Servo drive

4558 N101 N102,N103,N104 Audio amplifying

M62429 N105 Volume control

TDA8947J N106,N110 Digital pow er amplifier

RC4580 N107 Audio amplifying

CS5340 N108 A/D conversion

PT2314 N111 Audio proc essing

PT6961 N100 Panel control IC

HS0038A2 N101 Remote control rec eiver

KA5L0380R U501 Power sw itch IC

HS817 U502,U506 Photoelectric coupler

TL431 U503,U507 Precision voltage stabilizer

LM7805 U504 Voltage stabilizing tube

KA1M0880BTU U505 Power sw itch IC

Powr board

Decode board

Pow er amp lifie r

board

Mainpanel

Introduction to IC used in DK1110SI 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 us ed in trace

12 GND Ground 0.01 0.01 0 Grounding

13 V20 Input loader 2.04 2.06 2.03 Reference voltage

14 Vcc Input loader 5.04 5.04 5.02 Supply voltage for loader

15 E Input MT1389 2.06 2.45 2.03 Disc data signal

16 Blanking haning in air 0.01 0 0 unused

17 VR-CD Input loader 0.21 0.01 0

Through the handling inside loader, make

sure MD11 is 180mV when reading CD

18 VR-DVD Input loader 0.01 0.2 0

Through the handling inside loader, make

sure MD11 is 180mV when reading DVD

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

20 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

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 Loader signal explanation

Loader signals explanation is shown in the following table:

- 18 -

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

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

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.

3.2.2 Servo circuit

1. DK1110SI adopts SANYO HD62 loader and MTK decode solution (MT1389E+FLASH

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

processing, digital signal processing IC MT1389E and drive circuit D5954, in which MT1389E is also the

main part of decode circuit, shown in the figure 3.2.2.1:

Loader

Feed electric machine on loader

TROPEN

Open/close electric machine and detect switch

XS301

SL+

SL-

DVD laser power control

VCD laser power control

Disc identification circuit

D5954

SP-

SP+

ABCDEFabcd

Main axis braking circuit

Open/close circuit

TRCLOSE

TROUT

TRIN

IOA

Main axis electric machine on loader

Integration circuit

OPO

ADIN

OPOP+

150

148

20 21

MT1389E

Integration circuit

Figure 3.2.2.1 Servo circuit block diagram

- 19 -

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 MT1389E 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), Mt1389E pulls LOD1 of

Q302 base electrode in laser tube power control connected to VCD down to about 2.2V to make Q302

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), MT1389E pulls LOD2 of Q301 base electrode in laser tube power control connected to

DVD down to about 2.2V to make Q301 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 MDI1.

After loader reading disc information, A, B, C, D, E, F signals are sent out to Mt1389E (DVD only

has A, B, C, D signals), and then inputted from pin 2~11, 18, 19 of MT1389E. After being amplified and

processed by the pre-amplifier inside MT1389E, now signals are separated to two part s for processing

inside Mt1389E.

After being processed by digital servo signal circuit inside MT1389E, 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 MT1389E respectively, then change into analog servo control signal

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

driver circuit D5954 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 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 MT1389E, 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 MT1389E, 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 MT1389E, 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 to MT1389E, in usual conditions, TROPEN and TRCLOSE sent out by pin 39,

99 of Mt1389E are both low level, when signal of “open” comes, after Mt1389E 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, MT1389E pulls

- 20 -

down TRCLOSE and open/close electric machine stop running. When MT1389E receiving “close” signal,

Name

w hen reading

disc nor mally

w hen opening door w hen closing door

w hen no disc

TRO PEN 0

There is about 3.3V pulse w ith 1S at

the moment of opening door

0 0

TRCLO SE 0 0V

There is about 3.3V pulse w ith 1S at the

moment of opening door

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

TROPEN is set high level by MT1389E, 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, MT1389E pulls down TROPEN and electric

machine stops running to finish “close” process.

3. Explanation to servo terms

(1) FOO: for disc make differences, and 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,

now focus point of objective lens is required to adjust to make focus aim at data pit exactly. The acts are

mainly to make objective lens move upwards and downwards.

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

produce, now laser head is required to adjust. In this process, objective lens makes forward and

backward movement with small moving range.

(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 track.

(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.

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

- 21 -

3.2.3 Mute circuit

DK1110SI mute control circuit includes power-on mute control, power-off mute control and usual

mute function.

1. Power-on mute is shown in the figure 3.2.3.1. When voltage of pin 5, 10 of power IC TDA8947 is

lower than power supply voltage 3.5V of this IC, this IC enters MUTE mode, from 0 to 0.8V, it is STANBY

mode.

When power on, due to the function of Tc147 charge, V102 cuts off at the beginning, V103 is on,

HERDM is low level, shown in the figure 3.2.3.2. Seen from the figure, when HARDM is low, SCM,

LRSWM are pulled down to fulfil power-on mute.

V102

C9014

R179

47K

PVcc

R180 47K

R181 10K

HARDM

V103 8050

+12V

VD110 1N4148

TC147 22uF/25V

R178 100K

VD111

5.1V

Figure 3.2.3.1 Power-on mute circuit

2. Usual mute: 1389 sends out control signal SCMUT, LRSWMUT to control the on of triode V101,

V104 to make SCM, LRSWM be low level to fulfill mute function.

3. Power-off mute: V100 realizes power-off mute function. When +12V power failure, Tc136 still

keeps high level, now base electrode of V100 is low, V100 is on, base electrode of V101, V104 gets high

level and they are on to realize power-off mute function.

VD106

VD120

1N4148

12V1

LRSWMUT

VD107

1N4148

VD112

1N4148

C156

104

Figure 3.2.3.2 Mute circuit

C146 104

- 22 -

+12V

16V/100U

VD128

1N4004

VD105

TC136

PVcc

SCMUT

V100 8550

R162

220

V101 9014

HARDM

V104 9014

R163

22K

R164

22K

R165

10K

VD108

1N4148

VD109

1N4148

R166 10K

SCM

LRSWM

4. When inserting headphone, friction will produce noise, so these noise should be filtered. When

inserting, HDET pin is grounded and low level, which is sent to 188 pin of 1389E, 1389E receives HDET

low level and sends out control signal to TDA8947, output stops and mute function is realized.

Note: when inserting headphone, mixed left/right channel on AV board has output, audio signals on

power amplifier board have no output; when in mute, all has no output.

3.2.4 Open/close door circuit

1. Open/close door circuit diagram is shown in the figure 3.2.4.1:

MO_VCC

TC305

47uF/16V

R323

1.5K

LOAD-

TROPEN

R325 510R

Figure 3.2.4.1 Open/close door circuit diagram

2. Working principle:

Open door, VCC Q306CE electrode is on LOAD+ electric machine LOAD-

Q309CE electrode is on R326 ground

Q306 8550D

Q308

8050D

Q307 8550D

Q309 8050D

R326

2.2R\1/4W

R324

1.5K

R327 510R

Q310 9014-S

TC306 47uF/16V

R339 10K

LOAD+

TRCLOSE

TROPEN

When action of opening door is not performed, pin 99 and 39 of MT1389E are low level. When

opening door, pin 99 of MT1389E send out a high level, Q309 is on, collector electrode of Q309 changes

to low level, LOAD- changes to low level, base electrode of Q306 changes to low level, Q306 is on,

collector electrode of Q306 changes to high level and LOAD+ changes to high level.

Close door: VCC Q307CE electrode is on LOAD- electric machine LOAD+ Q308CE

eklectrode is on R326 ground

When closing door, pin 39 of Mt1389 sends out a high level, Q308 is on, collector electrode

changes to low level, LOAD+ is low level, base electrode of Q307 changes to low level through R324,

Q307 is on, collector electrode of Q307 changes to high level, LOAD- changes to high level.

- 23 -

The function of Q310 is to interlock TRCLOSE and TROPEN signals to ensure that the two are not

Key point Position Voltage Remark

DV33 (point A) Diode D215 cathode 3.3V

Af ter pow er of f, TC320 discharge c urrent f rom

this point

point B Diode D215 anode Af ter reset finishes , 3.3V

Af ter res et finishes , voltage increases to 3.3V

fr om 0V

point C Phase inverter pin 5 Af ter reset finishes , 0V

Af ter res et finishes , voltage decreases to 0V

fr om 3.3V

URST# (point D) Joint place of R256 and R253 Af ter reset finishes , 3.3V

Af ter res et finishes , voltage increases to 3.3V

fr om 0V

high level at the same time. When the two are high level input, the on of Q310 makes base electrode of

Q309 be low level to ensure the normal working of open/clode door circuit, electrolyte capacitor TC306

and TC305 are used to prevent the sudden change of two ends of in/out control electric machine and

make the action gentle.

3.2.5 Reset circuit

1. Reset circuit is shown in the figure 3.2.5.1:

DV33

R2011

75K

R2022

0R(DNS)

D215

1N4148

R2025

TC320

100uF/16V

R2023

47K

Q320

8550D

5 6

C1003 225

U205C HCU04

C1004

102

R2024

33R

URST#

Cs5340

FLASH

MT1389E

101

Figure 3.2.5.1 Reset circuit diagram

2. Working principle: when power on, voltage on two ends of capacitor Tc320 cannot change

suddenly, anode of capacitor begins charging from 0V, now triode Q320 is on, pin 5 of input end of phase

inverter U205C (HCU04) is high level, pin 6 of output end is low level and performs reset to chip

MT1389E, FLASH, TAS5508 and Cs5340; when capacitor charge is close to 3.3V, triode Q320 cuts off,

pin 5 of input end of phase inverter is low level, phase inverter outputs high level from pin 6 and system

reset finishes.

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

- 24 -

3.2.6 Main axis braking control circuit

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

C307

R320

SP-

150K

R317 R321 1R

C308

SPL-

R319 150K

R322 680K

Figure 3.2.6.1 Mai axis braking control circuit

Equivalent circuit is shown in the figure 3.2.6.2:

SP-

SPL-

R320 150K

R321 1R

R319 150K

C307

C308

R317

R322

680K

222

680K

222

680K

222

R318

OPO

ADIN

OPOP+

V1P4

OPO

ADIN

OPOP+

V1P4

Internal

processing

Figure 3.2.6.2 Main axis braking control equivalent circuit diagram

2. In order to prolong the usage life of electric machine and increase the influence of start-up

current to electric machine, when disc is in, R&D personnel design main axis electric machine into

running state all the time, even though STOP button is pressed. Thus, when pressing OPEN button, a

braking signal is required to make main axis electric machine stop rotating immediately to fulfill door

opening in short period.

During the course of playing, if OPEN button is pressed, main axis braking signal disappears, but

main axis electric machine is still in rotating state due to the function of inertia, now the inductive

electromotive force that produces from the rotation of electric machine achieves inductive voltage on

- 25 -

sampling resistor R321, through resistor R319, R320 with pin 35, 36 of MT1389E, after being processed

Key point Position Normal w orking voltage (V) Voltage var iation when opening door (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+ MT1389E pin 36/B 1.38 1.38 3.10 1.80

OP- MT1389E pin 35/A 1.53 1.53 3.08 1.98

OPO MT1389E pin 34/C 2.44 2.44 0.40 2.50

ADIN MT1389E pin 43/D 2.44 2.41 0.41 2.44

DMSO D5954 pin 5 1.42 1.42

VIP4 MT1389E pin 40 1.41 1.41

and amplified inside, output from pin 34, then through R318, send to pin 47 of MT1389E, through

MT1389E internal D/A conversion and relevant processing, pin 37 of MT1389E outputs an instant

electric machine reverse braking signal to make main axis electric machine speed down, when

MT1389E detects that disc stops rotating, disc tray will be out to ensure that disc will not rotate when

door opens.

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

3.2.7 Disc identification circuit

1. Disc identification circuit is shown in the figure 3.2.7.1:

AVCC

Q305 3904-S

R309

10K R311

10K

R310

100K

IOA

MT1389E

R308

100K

Q303

2SK3018-S

Loader

2. Working principle: the function of disc identification circuit is to recognise the disc inserted into

loader to judge whether the disc is VCD or DVD to make the relevant control action. When disc is

inserted, decode servo control IC MT1389E defaults disc to be DVD, pin 90 of MT1389E sends out a low

XS301

Figure 3.2.7.1 Disc identification circuit

Q304

2SK3018-S

- 26 -

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