BBK DK1410, DK1430, DK1440, DK1450, DK1460SI Service Manual

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DK1410SI DK1440SI

DK1470SI DK1480SI

service manual

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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

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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

Section One Principle of the Player

3.1.1 Function introduction

3.1.2 Block diagram principle of the player

Section Two Unit Circuit Principle

3.2.1 Decode circuit

Chapter Three Principle and Servicing

3.2.2 Servo circuit

3.2.3 Laser power control circuit

3.2.4 Main axis control circuit

3.2.5 Control panel circuit

3.2.6 Power circuit

3.2.7 Audio power amplifying circuit

3.2.8 Output circuit

3.2.9 Video circuit

Section Three Servicing Cases

3.3.1 Servicing cases

3.3.2Troubleshooting flow chart

Section Four Servicing Parameters

3.4.1 Signal waveform diagram

3.4.2 Key point voltage

Section Five Function Introduction to IC

3.5.1 function introduction to MT1389E

3.5.2 Function introduction to SDRAM

3.5.3 Function introduction to FLASH

3.5.4 Function introduction to D5954

3.5.5 Function introduction to 24LLC020

3.5.6 Function introduction to 74HCT125

3.5.7 Function introduction to Cd4052

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3.5.8 Function introduction to SAA6588

3.5.9 Function introduction to Cs5340

3.5.10 Function introduction to 4558/4580

3.5.11 Function introduction to TLV272

3.5.12 Function introduction to TAS5508

3.5.13 Function introduction to TAS5112

3.5.14 Function introduction to 5L0380

3.5.15 function introduction to LM431A

3.5.16 Function introduction to Hs817

3.5.17 Function introduction to Pt2579

Chapter Four Disassembly and Assembly Proces

Chapter Cinque

Section One PCB board

Section Two circuit diagram

PCB board & Circuit diagram

106

Chapter six BOM List

112

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Chapter One About Maintenance

1.1 Safety precautions

1.1.1 Power supply

When maintenance personnel are repairing DVD players, he should pay special attention to the

power board with 220V AC and 330V DC which will cause hurt and damage to persons!

1.1.2 Precautions for antistatic

Movement and friction will both bring static electricity which causes serious damages to integrated

IC. Though static charge is little, when a limited quantity of electric charge is added to large-

scaleintegrated IC, as the capacitance is very small in the meantime, now the integrated IC is very much

easy to be struck through by static electricity or the performance will decrease. Thus static electricity

prevention is of extraordinary importance. The following are several measures to prevent static

electricity:

1. Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth,

and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity

device. The length and depth of the metal embedded under the earth should be determined according to

the wettability of the local soil. For humid places, it may be shorter, and longer and deeper for dry places.

If possible, it can be distributed and layed in terms of “#” shape.

2. On operating table-board, the antistatic table cushion should be covered and grounded.

3. All devices and equipments should be placed on the antistatic table cushion and grounded.

4. Maintenance personnel should wear antistatic wrist ring which should be grounded.

5. Places around the operating position should also be covered with electric conduction cushion or

Painted with antistatic paint.

1.1.3 Precautions for laser head

1. Do not stare at laser head directly, for laser emission will occur when laser head is working, which

will Hurt your eyes!

2. Do not use wiping water or alcohol to clean laser head, and you may use cotton swab.

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1.1.4 About placement position

1. Never place DVD player in positions with high temperature and humidity.

2. Avoid placing near high magnetic fields, such as loudspeaker or magnet.

3. Positions for placement should be stable and secure.

1.2 Maintenance method

1.2.1 Visualized method

Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding,

rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of

elements appear. Check power supply of the machine and then use hands to touch the casing of part of

elements and check whether they are hot to judge the trouble spot. You should pay more attention when

using this method to check in high voltage parts.

1.2.2 Electric resistance method

Set the multimeter in resistance position and test whether the numerical value of resistance of each

point in the circuit has difference from the normal value to judge the trouble spot. But in the circuit the

tested numerical value of resistance is not accurate, and the tested numerical value of integrated IC's

pins can only be used for reference, so the elements should be broken down for test.

1.2.3 Voltage method

Voltage method is relatively convenient, quick and accurate. Set the multimeter in voltage position

and test power supply voltage of the player and voltage of a certain point to judge the trouble spot

according to the tested voltage variation.

1.2.4 Current method

Set the multimeter in current position and test current of the player of a certain point to judge the

trouble spot. But when testing in current method, the multimeter should be series connected in the

circuit, which makes this method too trivial and troublesome, so it is less frequently used in reality.

1.2.5 Cutting method

Cutting method should be combined with electric resistance method and voltage method to use.

This method is mainly used in phenomena of short circuit and current leakage of the circuit. When

cutting the input terminal voltage of a certain level, if voltage of the player rises again, it means that the

trouble lies in this level.

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1.2.6 Element substitution method

When some elements cannot be judged good or bad, substitution method may de adopted directly.

1.2.7 Comparison method

A same good PC board is usually used to test the correct voltage and waveform. Compared these

data with those tested through fault PC board, the cause of troubles may be found.

Through the above maintenance method, theoretical knowledge and maintenance experience, all

difficulties and troubles will be readily solved.

1.3 Required device for maintenance

Digital oscillograph ( 100MHE)

TV set

SMD rework station

Multimeter

Soldering iron

Pointed-month pincers

Cutting nippers

Forceps

Electric screw driver

Terminals connecting cord

Headphone

Microphone

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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 DC-DA and HDCD formats.

Playback of compressed musical files in Mp3 and WMA formats.

Playback of Karaoke-discs in DVD, VCD and CD+G formats.

Playback of photo al bums, recorded in Kodak Picture CD and JPEG digital formats.

Audio:

192 kHz/24 bit audio D/A converter.

Coaxial and optical audio outputs, providing digital sound playback in Dolby Digital/LPCM formats.

Coaxial and optiacl audio inputs, providing connection of external digital signal sources.

Stereophonic audio outputs 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, provding transformation of stereophonic signal to multi-

channel one.

Microphone input providing karaoke functions.

Headphones output.

Video:

108 kHz/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-RO, 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.

"Memorty” function which can load the last disc position on stop.

"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.

Chapter Two

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Auto protecion of TV screen.

Child lock, parental control(protection against playing undesirable discs)

Auto voltage selection(~110-250V)and short-circuit protection.

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

Pres to playback from the next bookmark

REW button

Press to playback fast reverse/radio station

tuning

Button

FWD

Press to playback fast reverse/radio station

tuning

2.2.2 Rear panel connections

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

AM Antenna input

FM Antenna input

Left front speaker input (output from the build in

amplifier)

Right front speaker input (output from the build-in

amplifier)

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Right Surround speaker input (output from the

build-in amplifier)

Audio input

Stereophonic audio output

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

Composite video output

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Center speaker input (output form the build-in

amplifier)

Subwoofer input (output from the build-in

amplifier)

Left Surround speaker input (output from the

build-in amplifier)

2.2.3 VFD display general view

MP3-disc

CD-, VCD-or SVCD-disc

DVD-disc

Repeat

AM/FM

Radio tuning mode

Tuner tuning mode

Stereo

S-Video output

SCART-type AV connector

Coaxial digital audio output

Optical digital audio output

Optical digital audio input

Coaxial digital audio input

Dolby Digital

Programmed radio station

Friquency

Playback time

Chapters or tracks

Playback or pause

PBC

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 t switch to audio input mode

DISP button

Press to display the disc information

LANG button

Press to change the canuage

SLEEP button

Press to turn the sleep mode on

Q-PLAY button

Press to tum 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 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

Button

Press to start reverse or forward scanning

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SKIP/RESET +/-

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 change the acoustic channel

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

stopped/playback from the previously meorized

point.

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

Press to switch to radio mode

KARAOKE button

Press to set the karaoke functions

USB button

Press to switch to USB mode

Button

Press to switch the device on/into standby

Press to stop the playback

Button

Press to turn on/off the virtual control panel

CANCEL button

Press to go one level back/cancel current

operation

OK button

Press OK for confirmation of 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/5.11CH

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

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2.3 FUNCTION SETTINGS

2.3.1 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 jog Dial; Press OK confirmation.

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

sellings, you have to select the lmage item and press the OK or GIGHT key of the cursor joystick.

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

press OK or RIGHT key of the cursor joystick. Fox 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.

4.Press SETUP to exit setup menu.

# 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 number

buttons and press OK.

If the language you select is not recorded on

the DVD disc, another available language will be used.

4.Subtitles: Selection of subtitles language #

Options: Off, Urssian, English, Estonian,

Lithuanian, Kazakh, Romanian, 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 relcoded 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 Auto.

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.

2.3.2 Language settings

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

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3.TV Format: image ratio settings

Options: 4:3 pan&scan, 4:3 letterbox and 16:9 TV.

Default option: 4:3 pan & scan.

some discs are recorded with support of only one ratio. The selected radio must comply with the TV screen.

4.Video output: selection of video signal.

Options: S-Video, Comp, RGB

Default option: Comp.

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 adjustong the relevant option.

Change the option value using the jog Dial.

Upon completion press the LEFT of the cursor joystick to return to image setup menu.

2.3.4 Sound settings menu

1.Mixer

a) Configuration: setting of the mode for

conversion of the 5-channel signal.

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.

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)

Options: Stereo, 5.1.

Default option: Stereo

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+R, L, R.

Default options: L+R.

# c) Surr.mix: set-up of surround oftions while

playing the sereo disc.

Options: Off, Sum, L+R, Virt, Surr.

# d) Low band: distribution of low frequencies

through channels.

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(dectiled description of this operation see on page 32)

g) PRO Logic ll: function of stereo sound

conversion to 5-channel sound.

Options: On, Off, Auto.

Default option: Audio.

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.

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

options.

Options: RAW, PCM

When you select the RAW option, the not

decoded signal is sransferred to the DVD receivers digital outputs, the decode 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 receivers 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.

Defacelt option: 48kHz 16bit.

3.Sound correction

a) Max volume: max volume limiting. #

Using the jog Dial, adjust the max volume level.

Press the LEFT key of the cursor joystick to

return 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, number

Edfault option: number

If on option is set, while reproducing discs, a

menu will appear, in which you can select the or order of playing the disc content. If the off option is wet, the reproducing of content is performed is the order, in which it is recorded of the disc.

3.Flids” 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 vol.

Default option: No vocal mode.

3.Volume:

Microphone: microphone sound volume level.

Using the jog Dial adjust the microphone

volume level.

Press LEFT key to the cursor joystick to return

to karaoke settings menu.

4.Echo: echo level while playing the karaoke-

disc.

Adjust the echo level Using the jog Dial.

Press LEFT key of the cursor joystick to return

to karaoke settings menu.

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

Options: On, Off.

Default option: On.

2.3.7 Preference settings

1.Gr.Equalizer: Spectrum analyzer. Options: On, Off.#

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# Default option: Off.

Default option: Off.

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

Options: Standard, Saved Default option: Standard.

3.Screen saver: Screen saver on/off.

Options: On, Off.

Default optioon: On.

4.Jog Dial

Options: Zoom, Step, Skip, Volume.

Default: Zoom.

2.3.10 Reset to defaults

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

2.3.11 Exit settings menu

Select the item using the jog Dial and press the

OK to exit the menu.

2.3.8 Parental control

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

Options: Any, Kid, G, PG, PG-B, PGR, R, NC-

Default option: Any.

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.

While being in this menu section, you cannot

return to the previous level by pressing the LEFT key of the cursor joystick.

2.3.12 Channel delay set-up

Set-up of tine delay in the surround

channel

Usually, time delay in the Dolby Digital decoding system is preset to ensure best offect while installing the Hone Theater. However, in case y you with 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.

Fig.1.Take into account the A-B distance; use both figures for setting the desired time delay.

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 Por 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 tow Lines on the chart will give the recommended delay value.

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Set-up of time delay in the central

Dolby Digital Dolby Por Logic surround

Rear channel Stereo 20 Hz-20kHz

mone channel with limited frequency range(100Hz-7khz)

Low-frequency channel(subowwfer)

Autilable, 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.

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 speakers in one line, as shown on Fig.3 with the delay value of the central 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 “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 signals dynamic range while recording; there fore; 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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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 dagree of sound information("night" mode)

Surround sound may be received from any signal source.

Possibility of program mable control of the decoder to transfer basses into lowfrequency channel in systems equipped 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 whti conventional stereo, the worol's mosst popular surround format.

Miscellaneous

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Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Function introduction

This players adopts new-generation DVD decode chip with built-in Dolby decoder, and the vivid

surround system brings you to taste the living cinema effect. It has the following features:

Progressive scanning output to produce steadier and clearer pictures without flickering

Composite video, S-video and component video output

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

gamma correction

Built-in Dolby digital decoder

Hi-FI stereo headphone output

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

respectively

Compatible with DIVX, MPEG4 format movie

3.1.2 Block diagram principle of the player

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

headphone board, tuner, power board and loader. Shown in the figure 3.1.2.1, except that power board

is not shown, other signal flow is basically shown in the figure. The main function of loader is to read disc

information and send to MT1389, MT1389 finishes servo function through D5954 on decode board and

other supplementary circuit, other circuits are used to guarantee the normal working of loader. FLASH

on decode board is to store system program, SDRAM is to store program and information of sound and

picture read from disc when the machine is working and guarantee their normal output. The main

function of power amplifier board is to perform audio DA conversion and amplification of analog signal to

output 5.1CH to guarantee the normal working of external speaker. The main function of AV board is to

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

requirements from customers. In addition, there is external sound input, and you may use the power

amplifier board of this player to perform power amplifying to it to facilitate to output to speaker. The tuner

of this player also makes it have tuning function, and it also equipped with SAA6558 chip, so it may

realize RDS function of Europe and RBDS function of US.

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Page 19

ROUTX

L R

LOUTX

SCART

Video S-video

VIDEO COMP

Optial

VEDIOC VIDEOY

Coaxial

Filtering

Front

Rear

L R

SLOUT

Figure 3.1.2.1 Block diagram of the player

Woofer

SROUT

Center

SW+ SW-

CEN

Front

FROUT

FLOUT

CD4052

N13

TAS5112

- 15 N11

RC4580

N10

RC4580

SCL

SDA SCLK LRCK

N12 TAS5508

SDAT A0 SDATA1 SDATA2

N14

TAS51 12

DAVNIN

XS301

D5954

U201

MT1389

Amplifying circuit N8

N9 TLV272

SDA AD

ADC DAT

CS5340

Y1 Y2 Y3 Y4 Y5 Y6

SPDIF

URST#

Filtering

AUXR

AUXL

TUL

TUR

Amplifying circuit

SAA6558

M 4558

Reset circuit

MIC 1

MIC 2

PDS MPX

External audio input

Tuner

Microphone

HDET

Loader

Headphone

VFD

Screen

CLK STB

SDA

N102

SO793

Button

N103

REMOT

IR receiver

U207

FLASH

U208

SDRAM

Page 20

Section Two Unit Circuit Principle

3.2.1 Decode circuit

1. Decode circuit block diagram is shown as in the following figure 3.2.1.1:

SDCLK

SDCKE

DCS

DRAS

SWE

SDRAM

DQM0

DQM1

DQ0~DQ15

MA0~MA11

FLASH

PWR

PRD

PCE

A0~A20

AD0~AD7

URST

Reset circuit

MT 1389

SDA SCL

EEPROM

24C02

Figure 3.2.1.1 Decode circuit block diagram

Clock

27M

V18

1.8V

voltage

regulating

U206

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

Working condition of decode circuit has:

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

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

system inside through internal frequency doubling circuit.

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

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

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

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

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

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

- 16 -

Page 21

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

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

at the same time of working.

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

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

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

conversion and then output.

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

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

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

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

circuit principle diagram and audio circuit explanation for details.

3.2.2 Servo circuit

Servo system of this player adopts SANYO loader MTK decode solution (MT1389E+FLASH

(16M)+SDRAM (6

4M)), and its servo circuit is mainly composed of front stage signal processing and

digital servo processing, digital signal processing IC MT1389E and drive circuit D5954, in which

MT1389E is also the main composition of decode circuit at the same time, shown in the figure 3.2.2.1:

IOA

MD11 LDO2 LDO2

MT1389

XS101

Feed electric machine

Main axis electric machine

Main axis control detect circuit

Switch circuit

APC circuit

A B C D E F RFO

TK-

TK+

FC+

FC-

SL+

SL-

SP-

SP+

D5954

FOSO

FMSO

TRSO

DMSO

Open/close circuit

Figure 3.2.2.1 Servo circuit block diagram

- 17 -

Page 22

2. Working principle:

After powering on or closing to proper position (on loader frame for general DVD player, on PCB

board of below part of card door for PDVD player), loader lens begins to reset; after laser head is on

proper position, detect switch will give a signal to MT1389, MT1389 begins to output focus, main axis

and light emission signals, disc begins to rotate, laser head begins to recognise disc information, and

judges whether disc is CD or DVD according to disc information to facilitate to output level from IOA pin

to control disc switch circuit and laser head PDIC to make the corresponding control acts. At the same

time, Mt1389 adjusts laser output power through laser power control circuit.

After loader reading disc information, through photoelectric conversion, A, B, C, D, E, F signals are

formed to give 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 added amplifying and through

subtraction circuit, one part of signals produce servo error signals and form the corresponding servo

control signal after being processed by digital servo signal circuit and output FOO, TRO, DMO, FMO

servo control signals from pin 42, pin 41, pin 37, pin 38 of MT1389 respectively, through the integration

circuit composed by resistor and capacitor, FOSO, TRSO, DMSO, FMSO signals are sent to servo drive

circuit for amplifying and then brings along fucus coil, trace col, main axis electric machine and feed

electric machine after drive amplifying. 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 reading DVD signals, these

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

after finishing RSPC error correction inside. General DVD player has a open/close circuit, which controls

the in/out action of door to reach the purpose of conveying discs. PDVD player adopts manual means to

open the door, and you may judge whether door closes to proper position through detect switch.

3. Explanation to servo terms

(1) FOO: because of the error in disc make, 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 downwards to make focus aim at data pit justly. The main act is

to make object lens move upwards and downwards.

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

- 18 -

Page 23

Deviation, now laser head is required to adjust. In this process, the object lens moves forwards or

Backwards, and the moving range is very small.

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

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

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

The acts are obvious when opening and selecting track.

(4) DMO: it is the performance agency for main axis disc rotation. Its rotation speed decides that of

disc. Its rotation is generated by an individual DC electric machine, in which rotation speed of DVD is

twice over that of CD.

3.2.3 Laser power control circuit

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

LDO-AV33

R301

4.7R TC302

47uF/16V

LDO2

Q301

2SB1132-S

XS301

MD1

Q302

2SB1132-S

20/21

MT1389E

LDO1

TC303 47uF/16V

4.7R

R302

Figure 3.2.3.1 Laser power control circuit diagram

2. Working principle

Pin 20/21 of MT1389 is laser power detect signal input pin, pin 21 is DVD laser power strong/weak

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

drive control output pin.

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

LDO-AV33

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

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

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

power to form an auto power control circuit.

- 19 -

Page 24

Name

When reading

disc normally

When disc out When disc in

When no

disc in

TROPEN 0

There is about 1 second 3.3V

pulse when at the moment of disc

out

0 0

TRCLOSE 0 0V

There is about 1 second 3.3V pulse

when at the moment of disc out

TROUT 3.41V

3.3V 0V 0V 3.3V

3.3V

TRIN 0

0V 3.3V 3.3V 0V

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

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

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

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

3.2.4 Main axis control circuit

1. Main axis control circuit is shown as in the following figure 3.2.4.1:

SP-

SPL-

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

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

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

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

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

C307 222

OPO

R320 150K

R317 680K

R318

ADIN

OP-

R321 1R

R319

C308 222

OP+

V1P4

150K

R322 680K

Figure 3.2.4.1 Main axis control circuit diagram

MT1389

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

rotating.

- 20 -

Page 25

Key point Position Voltage Remark

DV33 (point A) Diode VD201 cathode 3.3V

TC217 may sends out current from this

point after power failure

Point B Diode VD201 anode

3.3V after reset finishes

After reset finishes, voltage increases from

0V to 3.3V

Point C Pin 5 of reverter 0V after reset finishes

After reset finishes, voltage decreases from

3.3V to 0V

URST# (point D)

Connection place of

R256 and R253

3.3V after reset finishes

After reset finishes, voltage increases from

0V to 3.3V

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

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

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

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

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

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

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

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

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

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

disc is still rotating, but will stop very son.

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

3.2.5 Control panel circuit

1. Control panel circuit block diagram is shown in the following figure 3.2.5.1:

FL+

FL-

D+5V

-21V

XS 201

DGND

LED1

LED2

Volume knob

Figure 3.2.5.1 Control panel circuit block diagram

VFD screen

Grid1~Grid8

Seg2~Seg16

S0793

DATA

X S401

- 21 -

STB

CLOCK

Seg2

Seg3

Seg4 Seg5 KEY2 KEY1

Remote control receiver

Button

Page 26

2. Working principle

(1) Realization of button function: when users are operating machine, button matrix circuit will

produce a button information, and recognise button through S0793 to produce button function code to

transmit to the main CPU inside decode chip, CPU performs the corresponding switch to the function

module inside system, and a signal will produce to control OSD and panel display part to make the

corresponding display.

(2) Panel display drive: when the serial data signals conveyed by decode chip is transmitting to

panel IC (S0793), IC performs VFD drive according to the information conveyed by decode and displays

the corresponding content (controlled by software).

(3) Panel light control light: LED2 controls power switch indicator light, and it is high level after

power on; LED1 controls open/close button indicator light, after power on, low level is outputted to

lighten VD105, square wave signal is outputted when disc out and disc reading, VD105 flashes, it is high

level when playing normally, VD105 turns out.

3.2.6 Power circuit

1. Power circuit block diagram is shown in the following figure 3.2.6.1:

filtering circuit

Electromagnetic interference

filtering circuit

Bridge rectification

Transformer

circuit

Switch module

Absorption loop

Filtering

Start-up

Absorption loop

Filtering

Rectification diode

Feedback loop

Rectification circuit

Transformer

Rectification circuit

Rectification diode

Rectification circuit

220V

circuit

Start-up

Switch module

Rectification diode

Filtering circuit

P+28V

5V voltage regulator

Voltage regulating diode

A+5V

A+12V

D+5V

A-12V

-21V

FL+

FL-

D+3V3

Feedback circuit

Figure 3.2.6.1 Power circuit block diagram

- 22 -

Page 27

2. Working principle: this power circuit is composed of two parts, which use the common

electromagnetic interference filtering circuit and bridge rectification circuit and filtering circuit. The first

part circuit produces P+28V DC used to supply power for power amplifier circuit; the other part is

responsible for the power supply of other module circuit of the player. The working principle of each

composed part is shown as follows:

(1) Electromagnetic interference filtering circuit: various electromagnetic radiation exists in the

surrounding environment, so it will affect the inputted AC, and the function of electromagnetic

interference filtering circuit is to filter these interference to make those that enter bridge rectification

circuit is pure 220V AC.

(2) Bridge rectification and filtering circuit: the function of this circuit is to produce a 310V DC used

for rear stage.

(3)Start-up circuit: when power on, transformer does not begin to work, now the start-up circuit

provides switch module with a power supply voltage to make it work, after transformer begins to work

normally, the voltage provided for switch module by power supply circuit maintains the working of switch

module.

(4)Absorption loop:the switch module performs on/off action in a high frequency, so a strong self-

inductance voltage will produce in transformer primary coil and switch module will probably be damaged.

The function of absorption loop is to form a loop for this self inductance to ensure the normal working of

circuit.

(5) Switch module: that inputted from transformer is 310V DC. To make transformer work, AC shape

voltage must be presented. The function of switch module is to control this 310V DC to make it on for a

while and then off for a while to produce a high/low voltage change in the primary stage of transformer,

thus the transformer can work.

(6) Power supply circuit: provides a power supply voltage for switch module.

(7) Rectification diode: the voltage that outputs from transformer is pulse DC, the function of

rectification diode is to change pulse DC to DC together with the filtering circuit behind.

(8) Feedback loop: the time of “on” and “Off” in the same cycle inside switch module 5L0380R is

decided by feedback loop. Feedback loop perform sampling to +3.3V output voltage, when output

voltage is too high, through feedback loop, the space occupation ratio of pin 4 signal of 5L0380R is

changed, the “on” time decreases, and output voltage begins to decrease. When output voltage is too

low, the voltage sampled is on low side, through feedback loop, space occupation ratio of 5L0380R

increases, output voltage increases to make power board output stable voltage through the function of

feedback loop. LM431 used in this power is a 2.5V comparator, compare sampling voltage with this 2.5V

voltage, when sampling voltage is more than 2.5V (means output voltage is on high side), LM431 is on,

light emission diode in photoelectric coupler begins to emit light to make the other end of photoelectric

coupler begin to be on, the light emission is stronger, the “on” degree is large, the “on” time of switch

module 5L0380R decreases, output voltage begins to decrease. When sampling voltage is less than

- 23 -

Page 28

2.5V (means output voltage is on low side), LM431 cuts off, the “on” time of VEPR22 increases, output

voltage increases, thus power board outputs stable voltage through the auto control function of

feedback loop.

(9) Filtering circuit: the function is to produce a stable and small-ripple DC voltage. “ “-style filter is

often adopted in filtering circuit. The features of capacitor filtering are: when load resistance is high and

current is small, filtering function is obvious; for inductor filtering, when load resistance is small and

current is large, filtering function is obvious. Constitute capacitor to “ “-type filter, it may have better

filtering effect.

3. Main functions of various voltage outputted by power board:

(1) -21V: supply power for panel main chip N102.

(2) FL+¡¢FL-: supply power for filament of panel display screen.

(3) D+5V: supply power for N102, servo drive chip U302 (D5954) and open/close circuit.

(4) P+28V: supply power for audio power amplifying chip N13, N14 (TAS5112).

(5) A-12V, +12V: supply power for audio power amplifying chip N1 (F4558), N10 (RC4580), N11

(RC4580) on power amplifier board. A+12V: supply power for tuning data processing chip N6 (SAA6558)

and tuner.

(6) D+3V3: supply power for U201 (MT1389), U214 (FLASH), U211 (SDRAM) and U205 (74HCU04).

(7) A+5V (pin 5 of XP203): supply power for loader.

(8) A+5V (pin 1, 2 of XS504): supply power for power amplifier board ADC chip N7 (CS5340), and

digital audio pulse modulating chip N12 (TAS5508).

(9) A+5V (pin 4 of XS504): supply power for power amplifier board data selection chip N5 (CD4052),

and audio power amplifying chip N8, N9 (TLV272).

3.2.7 Audio power amplifying circuit

1. Audio power amplifying circuit block diagram is shown in the following figure 3.2.7.1:

External audio input

MIC signal input

External audio input

Decode board

AU R

AU L

CD4052

TUL

TUR

SDATAO,ADATA1,ADATA2

AINR

AINL

CS5340

SDA

74HCT125

SDA AD

N12

TAS5508PAG

N13

TAS5112

N14

TAS5112

TLV272

4580

N10

Surround left/right channel, subwoofer channel output on power amplifier board

Front left/right channel, centre channel output on power amplifier board

Left channel LD

AV board left/right channel output

Right channel RO

H-R

N11

H-L

4580

Headphone output

Figure 3.2.7.1 Audio power amplifying circuit block diagram

- 24 -

Page 29

2. Working principle: the system switches DVD signal and external input signal through the control

of N3, N4 by

M0, M1. When M0, M1 is 0, 1, through the selection of DVD signal bu system, N3B, N3C,

N3D, N4A, N4B, N4C of tri state gate buffer open, N3A and N4D close, 1389 sends the digital audio

signals SDA_LR, SDA_SLSR, SDA_SCW, SCLK, LRCK to 5508 directly for formatting, and the system

clock MCLK of power amplifier board is provided by 1389 through pin 6 of XP207, after being converted

by CS5340 AD , MIC signals are directly sent inside 1389 for processing, and overlapped to left/right

channel to output together after processing; when M0, M1 is 1, 0, through the selection of external input

signal (radio set and external audio input) by the system, N3B, N3C, N3D, N4A, N4B, N4C, N3A of tri

state gate buffer close, N4D opens, after being converted by CS5340 AD , external audio signals are

connected to SCLK, LRCK, SDA_AD and sent to 5508 for format conversion, and the system clock

MCLK of power amplifier board is generated by external crystal oscillation Y3.

N5 (CD4052): CD4052 is a select switch, which selects is the three-path signals of external input

tuning signal, MIC signal and left/right channel audio signal. When the player is selecting the state of

playing disc, MIC signal can be gated. Through CS5340, MIC signal converts to digital signal, which

inputs to decode board for processing and then output from pin 217 (ASDATO) of Mt1389 to power

amplifier board. Note: the MIC signal through CS5340 does not pass through N4 (74HCT125).

N7 (CS5340): convert the analog signal sent out from CD4052 into digital signal for processing in

rear stage circuit.

N3, N4 (74HCT125): 74HCT125 is a gating IC with 4-channel in it, which can select the 4-path

signals. N3 carries out the gating for the 4-path signals of clock signal MCLK, audio signal SDATA0,

SDATA1, SDATA2.

N12 (TAS5508): after performing pulse width modulating processing to the 4-path digital audio

signals of SDA, SDATA0, SDATA1, SDATA2, 10-channel output produces: left/right channel output on

input/output board, headphone left/right channel output, front left/right channel output on power

amplifier board, surround left/right channel output, subwoofer channel and centre channel output.

N13, N14 (TAS5112): it is a high-performance amplifying IC, which modulates and amplifies the

front left/right channel, surround left/right channel, centre and subwoofer after being PWM modulated by

N12 (TAS5508).

- 25 -

Page 30

3.2.8 Output circuit

1. Power amplifier surround left and right channel block diagram is shown in the following figure

3.2.8.1:

Disc

Loader

XC100

MT1389

218

ASDAT1

SROUT

SLOUT

46 47

50 51

TAS5112

R295

N13

SDATA1

XS207

PWMSR+

PWMSR-

PWMSL+

PWMSL-

R56

N12

TAS5508

6DASLSR

N3 74HCT125

Figure 3.2.8.1 Power amplifier surround left and right channel block diagram

2. Power amplifier left/right channel output and non power amplifier left/right channel output block

diagram are shown in the following figure 3.2.8.2:

MIC signal

Tuning signal

Left/right channel input

MIC1

MIC2

AU R

AU L

XS402

XP204

XP401

XS201

XS401

4558

TUR

TUL

AU R

AU L

(CD4052)

R100

SDALR

N3 74NCT125

SDAAD

R99

R101

TAS5508

R29

N4 74HCT125

PWMFL-

PWMFL+

PWMFR-

PWMFR+

PWMRL-

PWMRL+

PWMRR-

PWMRR+

XS207

N14

(TAS5112)

N18

(TLV272)

N19

(TLV272)

SDATA0

R225

40 41

FROUT

FLOUT

TLV272

R294

N18

N19

ASDAT0

217

MT1389

TUR TUL AU R AU L

XC100

XS401

XP401

Figure 3.2.8.2 Power amplifier L/R channel output and non power amplifier L/R channel output block diagram

224

Power amplifier left/right channel output

L100

L102

- 26 -

Page 31

3. Microphone circuit block diagram is shown in the following figure 3.2.8.3:

MIC2

MIC1

XP204

R101

PWM RR-

PWM RR+

N12 TAS5508

XS201

PWM FL+

PWM FR-

PWM RL-

PWM RL+

PWM H PR

PWM H PL

C210 R12

C110 R12

PWM FL-

PWM FR+

N8A

N9A

PWM H MR

PWM H ML

TAS5112

R166

R16

RC4580

N14

N10

R29N3B

4558

38 39

34 35

R165

R17

XS207

amplifier

N11

RC4580

power

board

N88

N98

FLOUT

FROUT

XS201

R20

C108

C165

Xs207

R217

R218

XP201

CD4052

L351

XS401

XP106

R81

R83

ASDATO

XP401

217

MT1389

Output

CS5540

U201

L100

L102

206

LOUTX

ROUTX

Figure 3.2.8.3 Microphone circuit block diagram

4. Headphone output circuit block diagram is shown in the following figure 3.2.8.4:

TUR

TUL

AUXR AUXL SL1 SL0

U201

MT1389

Output

CD4052

217

XP106

Headphone

board

R81

R83

R294 R29

XP204

Panel

CS5340

XS207 MPEG XS207 power

amplifier board

H-R

XS201

Power amplifier

board

H-L

N11

RC4580

R225

N4D

N3B 74HCT125

R151 R148

R152 R149

R99

PWM H PR

PWM H MR

N10

RC4580

R153 R146

R147

R150

PWM H PL

PWM H ML

R101

N12

TAS5508

Figure 3.2.8.4 Headphone output circuit block diagram

- 27 -

Page 32

5. External input circuit block diagram is shown in the following figure 3.2.8.5:

SDIN3

L122

L121

N12 TAS5508

AUXR

AUXL

PWM FL+

PWM FR-

PWM RL-

PWM RL+

PWM RR-

PWM RR+

PWM H PR

PWM H PL

XS401

PWM FL-

PWM FR+

N8A

N9A

PWM H MR

PWM H ML

CD4052

TAS5112

R166

R16

N10

RC4580

N14

38 39

34 35

R165

R17

R81

R83

N8B

N9B

N11

RC4580

FLOUT

FROUT

XS201

CS5340

C108

C165

SDA

R217

R218

XP201

R225

XS401

XP106

N4D

XP401

R99

L100

L102

LOUTX

ROUTX

Figure 3.2.8.5 External input circuit block diagram

3.2.9 Video circuit

Video circuit block diagram is shown in the following figure 3.2.9.1:

CVBS

164

Matched filter circuit

MT1389

168

170

171

Clamping circuit

G/Y/SY

B/Cb/SC

R/Cr

Filter circuit

V-OUT

S-VIDEO

V-OUT

Component video

SCART terminal

Video circuit block diagramfigure 3.2.9.1

- 28 -

Page 33

2. On the basis of 1389B, 1389E uses some pin functions again, and reduces USB function, so it

shows concise, video output pin is used again, the brightness signal, chroma signal, CVBS signal and

component video signal decoded through U201 (MT1389), through low pass filtering and clipping, are

sent to the corresponding terminal for output, shown in the figure 3.2.9.2:

XS206

1 2 3 4 5 6 7 8 9

11 12 13

XS11

IEC958

R/Y B/C

CVBS

G B/C R/Y HSYNC#

VSYNC# VDATA3

R223

75R

GND

L376

L377

L378

L379 L380 L381 L382 L383 L384

L385

FBSMT FBSMT

FBSMT

FBSMT FBSMT FBSMT FBSMT FBSMT FBSMT

FBSMT

Video circuit diagramfigure 3.2.9.2

is shown in the following figure .

3. 3.2.9.3 This circuit is very simple, R106 is a matched resistor,

which makes signal achieve the max power on load; capacitorC106, C108 and inductor L106 compose a

low pass filter to filter high frequency interference signal except for useful signals; diode VD108, VD109

compose a limiting circuit; we know from features of diode that the max limitation of chroma signal Y

cannot be more than 5.7V, and the min cannot be less than -0.7V, thus the high voltage signals from TV

set can be prevented from burning down the player.

C126 20P

C121 20P

C125 20P

C120

104

C124 20P

C122 20P

C123 20P

R129

220R R130

100R

6 5 4 3 2 1

XC105 DASW-02

COAXIAL

XC104B

AV4

XC104A

AV4

Cr/Pr

Cb/Pb

10 11 12 13

XP206 CON13

L120

VIDI

O COMP

D+5V

VD109

C108 47P

C109 47P

C111 47P

C114 47P

C115 47P

C117 47P

D+5V

VD100 1N4148

D+5V

1N4148

VD108 1N4148

VD107

1N4148

VD106 1N4148

VD105 1N4148

VD104 1N4148

VD103 1N4148

VD102 1N4148

VD101 1N4148

VD111

1N4148

VD110 1N4148

VIDEO_Y

VIDEO_C

VIDI

VIDIO

VIDIOV

O COMP

L106

C106 47P

C107 47P

C110 47P

C112 47P

C113 47P

C116 47P

L110

L114

L107

L111

L116

1.8uH

R105 75R

R106 75R

2 3

4 5

HSYNC

VSYNC VDATA3

SPDIF

R103 68R

OUT

C105 224

VCC

GND

XC106 TORX178A

D+5V

R107 75R

R108 75R

R109 75R

R110 75R

VIDEO_C

L103

L104

L105

L119

L118

Green

Blue

Red

SPDIF

Video circuit diagramfigure 3.2.9.3

- 29 -

Page 34

Section Three Servicing Cases

3.3.1 Servicing cases

Example 1 Mixed left channel on AV board has no sound

Analysis and troubleshooting: Step 1: use oscillograph to test LO signal on pin 5 of XS401 on power

amplifier board and find that there is no signal, after unplugging flat cable on XS401, LO still has no

signal output, so we can confirm that trouble lies in power amplifier board.

Step 2: use multimeter to test power supply of N8 (TLV272) and it is normal.

Step 3: use oscillograph to test pin 55 and 56 of N12 (TAS5508) and find that there is digital

waveform output, so we can judge that trouble lies in the circuit between N12 (TAS5508) and XS401.

Step 4: use oscillograph to test pin 2 and pin 3 of N8 (TLV272) and find that there is waveform input,

but when testing pin 7 of N8, there is no waveform output, so we preliminarily decide that N8 has trouble,

after changing N8, trouble is removed.

Note: N12 has waveform output but it is certain to be correct, because N12 may probably only

output carrier signal but no modulating signal.

Example 2 Headphone has no sound

Analysis and troubleshooting: insert headphone and test DET signal of pin 7 of XS201 on power

amplifier board and it is low level. Use oscillograph to test pin 5, 6 of XS201 and there is no HR, HL

signal, test pin 61, 62 of TAS5508 and there is output; check power supply of N10, N11 (4580) and it is

normal; test pin 1, 7 of N10 and there is no output! So we doubt that N10 is damaged, after changing

N10, trouble is removed.

Example 3 External input has no sound

Analysis and troubleshooting: adjust DVD plauer in AV IN state, and find that there is sound when

playing disc, so we can preliminarily confirm that the common part of external input and audio output

when playing disc is normal, shown in the figure 3.3.1.1, that is, elements behind N4 are all normal, and

now we only consider N5, N7, N4 and circuit among therm. Use multimeter to test power supply of N5,

N7, N4 and it is normal, use oscillograph to test output pin of N5 pin 13 and 3) and they both have signal

- 30 -

Page 35

Output, then when checking pin 4 of N7, there is no signal output, use multimeter to test whether circuit

between N5 and N7 is connected and also no trouble is found. After changing N7 (CS5340), trouble is

removed.

1. External L/R channel input

2. Tuner

3. MIC

CD4052

CS5340

Figure 3.3.1.1 Signal flow chart

74HCT125

N12

TAS5508

Operational amplifier

N13\N14 TAS5512

1. Headphone output

2. Mixed L/R channel output on AV board

Output

Example 4 Sound distortion

Analysis and troubleshooting: Step 1: check power amplifier board +28V power supply and +5V,

+3.3V, +12V, -12V and they are all normal, check clock on power board and it is also normal.

Step 2: check waveform and find that all waveform has output, no trouble found.

Step 3: after changing decode board, sound becomes normal, so we can confirm that trouble lies in

decode board.

Step 4: check clock of MT1389 and it is 26.999MHZ, which is normal. Check the output of pin 2 of

+1.8V voltage regulator U202 and it is +1.9V, which is normal. Check DV33 on pin 3 of XS203 and it is

+3.4V, which is also normal.

Step 5: through the above steps, carefully check power supply of MT1389, and find that L235 is

burnt down, resistance value becomes large, after changing L235, trouble is removed.

Conclusion: after some preliminary checking, if trouble is not found, you may change circuit board

to make sure which board trouble lies in to facilitate the next operation. As for sound trouble, if power

supply and clock is both normal, you may consider changing IC.

Example 5 Power amplifier has no sound

Analysis and troubleshooting: shown in the figure 3.3.1.2; Step 1: check power amplifier board

+28V power supply and that on XP101 and they are both normal, check clock and it is also normal.

Step 2: check SDATA0, SDATA1, SDATA2 on pin 2, 3, 4 of XS207 and they all have output, which is

normal.

Step 3: check pin 49 (PWM CEN-) of N12 (TAS5508) and it has no output (you may also check other

output pin), check pin 28, 29, 31 (audio signal input pin) 0f N12 (TAS5508) and all signals have input, so

we preliminarily judge that TAS5508 has trouble.

Step 4: check power supply of TAS5508 and it is normal. After changing TAS5508, trouble is not

removed.

- 31 -

Page 36

Step 5: use DC level of multimeter to test voltage on output terminal, and find that voltage of SW+

and SW- is 6.09V, voltage of all other output is 14.02V and they are both +14V in normal conditions, so

we can judge that the capacitor of circuit between N13 (TAS5112) and output part has electric leakage,

change C139, C140, C141, C142, C143, C66, C71, but trouble is still not removed.

Step 6: after removing resistor R142, R143, voltage output of SW+ and SW- is +14V, which is

normal. We judge that one of R142 and R143 has trouble, after changing it, voltage of SW+ and SW-

changes to +6.02V, and trouble is still not removed.

Step 7: after changing N13 (TAS5112) directly, trouble is removed.

Conclusion: N13 is damaged inside, after connecting R142, R143, it will form loop with ground,

which will lead to abnormal working of N13 to make SD signal of pin 6 output low level, this signal

controls TAS5508 and performs self-protection function and cannot output signal, which makes us

consider that TAS5508 is damaged.

+28.5V

R44

R47

4.7K

PWM_SL+

PWM_SL-

VALID

PWM_SR-

PWM_SR+

PWM_SW+

PWM_SW-

L4 10uH

N13

C24104

C23105

C25 105

PGND

1 2 3 4 5 6 7 8 9

11 12 13 14 15

17 18 19 20 21 22 23 24 25 26 27 28

TAS5112DFD

GND GND GREG /OTW

PVDD_D

/SD_CD

PVDD_D /SD_AB PWM_DP PWM_DM /RESET_CD PWM_CM PWM_CP DREG_RTN

PVDD_C M3

PVDD_C M2 M1 DREG16PVDD_B PWM_BP

PVDD_B PWM_BM /RESET_AB PWM_AM PWM_AP GND DGND GND

PVDD_A DVDD

PVDD_A GREG GND GND

R2080R

PWM_SL+

R2090R

PWM_SL-

VALID

R2510

R2100R

PWM_SR-

R2110R

PWM_SR+

R2410

PWM_SW+

R2120R

PWM_SW-

R2130R

PGND

R2751

C22 104

PGND

GVDD

BST_D

OUT_D OUT_D

OUT_C OUT_C

BST_C BST_B

OUT_B OUT_B

OUT_A OUT_A

BST_A

GVDD

PGND

C27

56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29

PGND

104

VCC28A

C32333

R311

PGND

C28104

R341.5

C29104

R361.5

PGND

C33333

R321

C129333

R1311

PGND

C120104

R1341.5

C121104

R1361.5

PGND

C130333

R1321

VCC28A

C26 104

1000u/35V

+28.5V

C40 103

C38

C36

102

R40

3.3

PGND

+28.5V

C137 103

C135

C133

102

R140

3.3

PGND

L1 10uH

L9 10uH

L1010uH

C139

0.47u

GND

GND GND

GND

DNS

C43

R45

0.47u

5.1K

PGND

+28.5V

R38

R39

4.7K

DNS

R90

5.1K C90

0.47u

PGND PGND

R142 10K

C140

0.1u

C141

R143

0.1u

10K

R52

C44 103

R93

C93 103

R144

C143

103

PGND

C142 103

R145

XC100C

SLOUT

C64

103

SL-

104

WP12

XC100D

SROUT

C65

C10

103

SR-

104

WP12

C66

103

XC100E

SW+

SW-

WP12

C71

103

Figure 3.3.1.2 Power amplifying circuit diagram

Example 6 MIC has no sound

Analysis and troubleshooting: when playing discs, use remote controller to open MIC item and there

is still no sound. Check power supply of 4558, CD4052, CS5340 and they are all normal. Use

oscillograph to test pin 6 input of 4558 and it is normal, pin 7 has no input, check R4, C6 and they are

both normal, so it is doubted that 4558 is damaged, after changing 4558, MIC is normal.

Example 7 Power amplifier has no sound

Analysis and troubleshooting: use multimeter to test power supply on power amplifier board XP503

and it is +29.6V, which is normal, Test power supply on XP101 and it is also normal, test HDET signal on

pin 24 of XS207 on power amplifier board and it is 0V; when working normally, if headphone is not

inserted, voltage on HDET should be about +3.3V. Test HDET signal on pin 7 of XS201 on power

amplifier board and it is 0V, which is abnormal, in normal conditions, if headphone is not inserted,

voltage in this place should be +2.9V; when power off and headphone is not inserted, use multimeter to

- 32 -

Page 37

Test the resistance to ground of HDET signal of pin 7 of XS207 and it is 0 ohm, and it should be infinite

in normal conditions, so we preliminarily confirm that HDET signal is short-circuited to ground, unplug

flat cable on XS201, test the resistance to ground of pin 7 of XS201 and it is infinite, which is normal, and

now test the resistance to ground of pin 7 (HDET) of XP204 on panel and it is still 0 ohm, so we can

consider that problem lies in main panel, headphone board or flat cable, unplug the flat cable between

panel and headphone, test the resistance to ground of pin 7 of XP204 on panel and it is infinite, so we

can confirm that problem lies in headphone board, but joint welding has not been found in headphone

board, so only socket has trouble, after changing headphone socket, trouble is removed.

Conclusion: that the spring plate inside headphone socket has trouble makes HDET signal and

ground connected together, HDET signal flow is shown in the figure 3.3.1.3:

Headphone socket

HDET_IN

HDET

Decode board XS207

XS106

HDET_IN

4094DAT

HDET

7 7

XP204

Decode board XS207

HDET

7 7

XP201

HDET_OUT

24 24 24

Power amplifier board

XS207

HDET

U201

MT1389

6 6

XS106

6 27

181

HDET

PH_SEL

Power amplifier board

XS207

N12

TAS5508

Figure 3.3.1.3 HDET signal flow chart

Example 8 Power not on

Analysis and troubleshooting: Step 1: check each circuit power supply of power board and it is

normal.

Step 2: check clock circuit and it is normal (frequency is 27MHZ, VPP=1.8V, DC voltage on two

ends is 0.75V), during the course of checking machine, you may directly test on two ends of R244 and

R248, thus it is convenient, but the machine will be down or give whistle sound during test, but the test

result will not be affected basically, if the influence is obvious when testing on one end of resistor, you

may test the other end. Of course, as for the defective machine that power not on, the above

phenomenon will not be noticed.

Step 3: check reset circuit and voltage is 3.3V, which is normal; reset by force (use a lead to make

pin 6 of U205 (HCU04) grounding for about one second), nut power is still not on, so we can preliminarily

decide that it has nothing to do with reset circuit.

Step 4: check power supply of MT1389 according to the troubleshooting process and it is normal;

check power supply of U214 (FLASH), U211 (SDRAM) and it is normal; check pin 5 and pin 6 of I2C

(U202) and they are both at +2.5V, which is also normal.

Step 5: after changing FLASH, trouble is removed.

Conclusion if there is oscillograph, firstly check whether pin 29 of FLASH has waveform, if not, a

trouble may exist between MT1389 and FLASH. If there is no oscillograph, firstly consider changing

FLASH, then changing SDRAM, if trouble is still not removed, then consider changing MT1389.

- 33 -

Page 38

Example 9 Power not on

Analysis and troubleshooting: Step 1: check power supply of power board and find that power has

no voltage output, unplug flat cable on power board and there is still no voltage output on power board,

so we can confirm that trouble lies in power board.

Step 2: observe element on power board and find that U505 (KAIM0880) is burnt down, then check

fuse and find that fuse has been burnt down.

Step 3: use multimeter to test bridge circuit BD501 and find no abnormality (pay attention to the pin

sequence of BD501).

Step 4: change fuse and U505 (KAIM0880), and trouble is removed.

Conclusion: when servicing power board, if you find that fuse and switch module have been burnt

down, please check whether diode on bridge circuit has been burnt down.

Example 10 Power amplifier has no sound

Analysis and troubleshooting: Step 1: check HDET signal of pin 24 of XS207 on power amplifier

board and it is +3.3V, voltage on XP101 and +28.5V voltage on XP503 are both normal.

Step 2: check SDATA0, SDATA1, SDATA2 (R294, R295, R296) output on decode board and it is

normal.

Step 3: check SDACSW (R98), SDASLSR (R100), SDALR (R101) signals on power amplifier board

and they are all normal.

Step 4: check each output pin of TAS5508 and they al have no output.

Step 5: check TAS5508 power supply and MUTE signal and they are both normal.

Step 6: check pin 63 MCLK of TAS5508 and it is about 3MHZ, pin 26 LRCK is 48KHZ, pin 27 SCLK

is about 12.3MHZ, the external crystal oscillation clock of chip is about 13.5MHZ, which are all normal.

Step 7: after changing TAS5508, power amplifier still has no sound output.

Step 8: after changing N13 (TAS5112), output is normal.

Conclusion: each input signal, power supply and clock signal of N12 (TAS5508 ) are all normal but

there is no output, so directly change N12; but trouble is still not removed after changing, so the rear

stage circuit may probably cause that N12 has no output, after changing N13, it resumes normal; the

internal trouble of N13 leads to the shotr circuit of N12 output pin, N12 is with self-protection function to

stop outputting signal. Power amplifier board audio signal flow chart is shown in the figure 3.3.1.4:

Surround L/R channel and subwoofer channel output

Front L/R channel and centre channel output

MT1389

ASDAT0

154

ASDAT1

155

ASDAT2

156

R294

R295

R296

SDAT A0

SDAT A1

SDATA2

74HCT125

SDA LR

SDA SLSR

SDA CSW

R101

R100

R98

N12

TAS5508

N13

TAS51 12

N14

TAS5112

Decode board

Power amplifier board

Figure 3.3.1.4 Audio signal flow chart

- 34 -

Page 39

Example 11 Component color distortion

Analysis and troubleshooting: Step 1: check MT1389 clock, 26.999MHZ, VPP=1.72V, normal

(27KHZ when in normal conditions).

Step 2: check MT1389 power supply and it is normal.

Step 3: use oscillograph to test the 3 component signals of pin 6 (Y4), pin 7 (Y5) and pin 8 (Y6) of

XP206 on AV board and they all have output, but when using multimeter to test DC voltage of the 3

signals, we find that Y5 has +4.7V, in normal conditions, this voltage should be two several tenths of a

volt and one volt plus a little at most.

Known from the circuit, only when damping diode has trouble, it has the most possibility to make

this voltage increase; when using multimeter to test diode, we find that VD100 has been stricken

through, after changing it, trouble is removed.

Note: as for colour distortion problem, if problem of capacity has electric leakage, inductor has

open circuit, damping diode is stricken through and or short circuit is found, please firstly consider

changing Mt1389.

Example 12 Component video has no output

Analysis and troubleshooting: use oscillograph to test VIDEOY1, VIDEOU, VIDEOV (VD103,

VD101, VD111 anode), VIDEO Y1 has no output; VIDEOU and VIDEOV have output. Test pin 6 of

XP206 and pin 6 of XS206 on decode board, there is no waveform output basically. Disconnect the flat

cable between XP206 and XS206, waveform of pin 6 of XS206 resumes normal, so we estimate that

trouble lies in filtering circuit on AV board. Check R108, C112, C114, VD102, VD103 and find that VD102

is stricken through, after changing VD102, component video output is normal.

Example 13 Power not on

Analysis and troubleshooting: Step 1: check power supply of power board and all output all normal.

Step 2: check the output of 1.8V voltage regulator and it is +1.9V, which is normal.

Step 3: check clock frequency of two ends of X201 in clock circuit and it is normal.

Step 4: check the output of pin 6 of reset circuit U205 (HCU04) and it is +3.4V, which is normal.

Step 5: reset bu force (use a lead to make U205 (HCU04) grounding for about one second) and find

that power may be on, and the player may work normally; power of again after power off, and find that

power may be on, but after power on and off repeatedly for several times, power will be off again, after

reset by force, it may power on freely.

Step 6: after changing U205 (HCU04) and power on repeatedly (above ten times), there is no

abnormality that power not on, so trouble is removed.

Conclusion: power also may be on when reset circuit has trouble, but it is not on sometimes, which

may be caused by random trouble, now you need to test repeatedly to confirm whether reset circuit has

trouble.

- 35 -

Page 40

Example 14 Not read DVD

Analysis and troubleshooting: Step 1: check XS301 socket and flat cable and no abnormality is

found (you may observe directly, and you need to insert it again when you find that flat cable is loose).

Step 2: change loader and trouble is removed.

Conclusion: in actual servicing, when you meet the trouble such as no disc reading, it is always

difficult to judge which element has trouble, so you may try changing loader to judge where the trouble is

in.

Example 15 No disc reading

Analysis and troubleshooting: shown in the figure 3.3.1.5; Step 1: check each flat cable and no

abnormality is found.

Step 2: after changing loader, disc reading is still unavailable.

Step 3: observe laser head and find no focus acts (after opening door), other acts are normal, so it

is preliminarily judged that servo circuit has trouble.

Step 4: check and find that power supply on pin 8, 9 of U301 (D5954) is normal, and that on pin 21

is also normal, check reference voltage on pin 4 of U301 and it is 1.4V, which is also normal.

Step 5: check U302, R211 and C213 and no abnormality is found.

Step 6: after changing U301 (D5954), trouble is removed.

Conclusion: in actual servicing, it is difficult to judge whether an IC has trouble or not; sometimes

you may try considering changing IC and check whether trouble is removed. If there is digital

oscillograph, firstly check the end close to MT1389 of R211, if there is waveform (waveform diagram in

section 4) within a small period (about 5 seconds) after disc in, the possibility that MT1389 has trouble is

small, and D5954 may probably have trouble.

Example 16 No disc reading

Analysis and troubleshooting: shown in the figure 3.3.1.5; Step 1: check each flat cable and no

abnormality is found.

Step 2: after changing loader, still no disc reading, and trouble is still not removed.

Step 3: observe laser head and find that focus, feed and main axis have no acts, even that laser

head does not emit laser light.

Step 4: check power supply and clock circuit of MT1389 and some abnormalities are found.

Step 5: use oscillograph to test the end close to MT1389 of R208, R209, R210, R211 (test within a

small period after disc in), and find no obvious waveform output, so we preliminarily judge that MT1389

has trouble, after changing MT1389, trouble is removed.

- 36 -

Page 41

Example 17 No disc reading

Analysis and troubleshooting: shown in the figure 3.3.1.5, Step 1: check the nerve flat cable socket

on XS301 and find no abnormality.

Step 2: change loader, disc reading is normal and trouble is removed.

U301 BA5954

Figure 3.3.1.5 Servo drive circuit diagram

Example 18 No disc reading

Analysis and troubleshooting: Step 1: check XS301 flat cable and socket and there is no abnormality.

Step 2: change loader and trouble still exists.

Step 3: check power supply, observe laser head, main axis and they are both normal, but bu fucus.

Step 4: check BA5954 power supply and reference voltage and they are both normal.

Step 5: check MT1389 power supply and it is normal.

Step 6: check the path between pin 42 of MT1389 (focus error signal output) and pin 1 of BA5954,

and find that there is capacitor electric leakage among C210, C211, C212 and C213; change one by one

and find that after changing C213, trouble is removed, which means that C213 has electric leakage.

- 37 -

Page 42

3.3.2Troubleshooting flow chart

1. Troubleshooting process for voltage too high or too low is shown as the following figure 3.3.2.1:

Voltage too high or too low

Multiple outputs too high or too low

Check

whether R513,

C513, R509 and R508

are normal

Check

whether C509,

TC508 and TC509 have

electric leakage or

short circuit

N N N

Figure 3.3.2.1 Troubleshooting flow chart for voltage too high or too low

Change corresponding element

Check relevant element of feedback loop

Change

U503 (TL431)

and check whether it

is normal

Check whether filter capacitor has electric leakage or short circuit

Change

U5021 (2501)

and check whether it

is normal

Only one output too high or too low

Change

rectifier diode

of this circuit and check

whether it is

normal

check whether it is

Change

D505 and

normal

- 38 -

Page 43

2. Troubleshooting process is shown as the following figure 3.3.2.2:

Trouble when opening/ closing disc tray

Opening disc tray not fully

Change frame

Noise occurs in disc tray door

Vibration occurs when disc in/out

Check whether TC305

and Tc306 are normal

Change abnormal capacitor

Close disc tray automatically

Open disc tray automatically

Check whether flat cable is inserted fully

Check whether socket on frame and XS302 has been oxidated

Whether detector switch on frame is normal

Open/close disc tray automatically

Check whether V306 V307 V308 V309 V310 are normal

Well insert flat cable

Change socket or use alcohol to clean

Change frame

Change the corresponding triode

Disc tray not open

Check whether frame is normal

Disc tray not close

Change frame

Check whether the resistor and capacitor related to disc open/ close is rosin joint and joint welding

Figure 3.3.2.2 Troubleshooting flow chart when opening/closing disc tray

- 39 -

Page 44

3. URST# is always high level troubleshooting process, shown in the figure 3.3.2.3:

RST# is always high level.

Forced reset firstly

Whether the player

works normally.

Check other circuit.

Change phase inverter and check whether U205 (HCU04) is normal.

Change Q320

Whether the player works normally.

Check whether R2023 is short circuit; whether C1003 is short circuit

or electricity leakage. Change Tc320 and check whether the player can work normally.

Figure 3.3.2.3 Troubleshooting flow chart when URST# is always high level

- 40 -

Page 45

4. Troubleshooting process for “On-screen-mosaic when playing” is shown as the following figure

3.3.2.4:

On-screen-mosaic when playing

Check whether power supply and clock signal of U201 (MT1389) is normal

Change U201

(MT1389) Ok

Y Y

Finish

Refer to troubleshooting process of U201 (MT1389) power supply and clock circuit

Change U208 (SDRAM)

Change U207 (FLASH)

Figure 3.3.2.4 Troubleshooting flow chart of “On-screen-mosaic when playing”

- 41 -

Page 46

5. Troubleshooting process for “No output for composite video” is shown as the following figure

3.3.2.5:

No output for composite video signal

Whether it is normal after restoring into default settings

Check Xs2061 flat cable and socket

Whether Y3 has video waveform output

Whether VIDEO_ COMP has waveform

Whether U201 (MT1389) power supply and crystal oscillator circuit is normal

Change U201 (MT1389)

Check whether matching filter circuit has capacitance electric leakage or inductor circuit opening

1. Check power supply circuit

2. Check clock signal check and correct flow

Check filter circuit

Figure 3.3.2.5 Troubleshooting flow chart of “No output for composite video”

- 42 -

Page 47

6. Troubleshooting process for "No colour of picture" is shown as the following figure 3.3.2.6:

No colour of picture

Check whether clock

signal is normal

Check whether U201

(MT1389) is normal

Change MT1389

Check clock circuit

Check power supply circuit (refer to MT1389 troubleshooting flow chart)

Check other circuit

Figure 3.3.2.6 Troubleshooting flow chart of “No colour of picture”

- 43 -

Page 48

7. Troubleshooting process for no sound of power amplifier board when playing is shown as the

following figure : 3.3.2.7

No sound output for all channels

Whether +28V power supply on XP503 is normal

Whether HDET

signal on pin 24 of

XS207 is high level

(when no microphone

is inserted)

Check whether

mute control signal MUTE

on pin 14 of XS207

is high level

1. Check whether

crystal oscillator Y3

is 12.2MHz.

2. Check whether

crystal oscillator Y1

is 13.5MHz.

No sound in power amplifier board when playing disc

Refer to troubleshooting

process of +28V power supply

1. Check whether HDET signal on pin 24 of XS207 has joint welding.

2. Check whether HDET signal on pin 7 of XS201 has joint welding.

3. Check whether headphone holder has problem to cause HDET to produce low level (high level when in normal condition)

1. Check whether it is mute status.

2. Whether capacitor on MUTE circuit of mute control signal has electric leakage.

3. Others

Check the clock circuit of Y1, Y3.

Check whether flat cable holder is joint welding or inserted to proper position

No sound for a certain channel

(take centre sound for instance)

Play 5.1CH disc

Check whether

SDATA2 signal on pin 4

of XS201 has digital

waveform

Check whether

pin 11 of N3 has

digital waveform

Check whether

pin 50, 51 of N12 (TAS5508)

has digital waveform

Change MT1389

Change N3

Change

Check whether R98 is normal

Change N12 (TAS5508)

Check whether

RST reset signal of pin 1

of Xs207 is high

level (3.3V)

Use oscillograph

to check whether 3DATAD

signal on pin 21 of Xs207

has digital waveform

(when playing

disc)

Check whether

pin 40~43 of N12 (TAS5508)

has digital waveform

Change N13 N14

(7AS5112) and check whether

they are normal

1. Check whether the capacitor on N12 (TAS5508) reset signal

RST line has electric leakage or short circuit.

2. Change MT1389

Check whether

R202, R203 are

normal

Change

Change N14 (TAS5112)

Change MT1389

Reset N12

(TAS5508) forcibly and

check whether

it is normal

Change 5508

If repeat power on/off is normal, this player is normal.

Check power supply circuit

3.3.2.7

Figure Troubleshooting process for no sound of power amplifier board when playing

If there is no sound when power on again, you need to change MT1389.

- 44 -

Page 49

8. Troubleshooting process for no sound of MIC is shown as the following figure 3.3.2.8:

No sound of MIC

Both have no sound

Whether MIC item has been opened.

Note

Whether power

supply of 4558, CD4052

and 5340 is

normal

Use oscillograph

to test whether pin 6

of N1 (4558) has

input

Whether pin 7

of N1 has output

Use remote controller to open MIC items

Check and repair the

corresponding power supply circuit

Check flat cable of XP201, XS201

Whether C6, R4

are normal

One has no sound, for instance, MIC1 has no sound

Check whether

pin 3 of XS201 has

MIC1 signal

Check R1 C1

Note : MIC items can be selected only when playing disc.

Change C6, R4

Check XP201, XS201 and

flat cable or change MIC holder

: Speak with MIC at the same time when measuring signal everywhere.

Whether pin 28

of XS207 on power

amplifier board

has output

Whether two

ends of R226 (near 207)

have signal

Change MT1389

Change N1

Check whether flat

cable is well inserted or whether R226 has broken circuit

Figure Troubleshooting flow chart for no sound of MIC

3.3.2.8

Whether pin 3,

13 of N5 (CD4052)

have output

Whether R87 is normal

Change N7

Change N5 (CD4052)

Change or well weld R87 again

- 45 -

Page 50

9. Troubleshooting process for no sound of headphone is shown as the following figure :3.3.2.9

No sound of headphone

Insert headphone

Whether pin 7 HDET of Xs201 is low level

Use oscillograph

to test whether pin 5, 6

of XS201 have H-L,

H-R signal

Whether pin 1, 2 of XS106 have H-R, H-L signal

Change headphone holder

Whether pin 6 HDET of XS106 is low level

Check flat cable of XS106, XP106

Change headphone holder

Whether power

supply of N10, N11

(4580) is normal

Check power supply circuit

Use oscillograph

to test whether PWMHPR,

PWMHMR signal

has output

Change N12 (TAS5508)

Whether pin 1, 7 of N10 (4580) has output

Change N10

Change N11

Figure Troubleshooting flow chart for no sound of headphone

3.3.2.9

- 46 -

Page 51

10. Troubleshooting process for no echo of microphone is ahown as the following figure : 3.3.2.10

No echo

Check whether DET

has a voltage that changes with

microphone volume change

when microphone

is outputting.

Check whether

N7 (CS5340) power

supply voltage and clock

signal are normal

Check whether

pin 14 of N7 (CS5340)

has OK signal input

Check whether

pin 4 of N7 (CS5340)

has output

1. Check the path between pin 4 of and pin 224 of Mt1389.

2. Change MT1389.

Check power supply circuit

when there is no voltage; change Mt1389 when there is no clock

Check the path between OK

signal on MIC board and CS5340 on decode board

Change CS5340

and check whether

it is normal

Check

whether pin 7 of N1 (4558)

has a voltage that changes with

microphone volume

change

1. Check whether R618 has

open circuit or variable value

2. Change U601 (4558)

Check whether

cathode of VD603 has a

voltage that changes with

microphone volume

change

Check VD602 and R619

1. Check whether D603 has open circuit

2. Whether Tc611 and R620 has electrical leakage or short circuit

Check peripheral circuit

of CS5340

Figure 3.3.2.10 Troubleshooting flow chart for no echo in microphone

- 47 -

Page 52

11. Troubleshooting process for no remote control function is shown as the following figure

: 3.3.2.11

No remote control function

(remote controller is normal)

Check the path between pin 11 of U201 (MT1389) and pin 1 of XP201.

Figure Troubleshooting flow chart for no remote control function3.3.2.11

When pressing

remote controller, use

oscillograph to check

whether pin 1 of flat cable holder Xp201

has output

When pressing

remote controller, use

oscillograph to check

whether pin 11 of U201

(MT1389)

has output

Change U201 (MT1389)

N N

Check whether

5V power supply of pin 3

of N103 (REMOT)

is normal

When pressing

remote controller, check

whether pin 1 of N103

(REMOT) has output

Check whether R124 has

broken circuit

Check the relevant power supply circuit

Change N103 (REMOT)

- 48 -

Page 53

12. Troubleshooting process for there is sound but no image is shown as the following figure

:3.3.2.12

There is sound but no image

One path has no output

Each path signal has no output

Whether the

corresponding pin of

MT1389 has

output

Whether the

corresponding signal

(VIDEO-COMP) J of

catching diode

is normal

Check capacitor, inductor and output terminal of this path signal on AV board path

Check matching resistor

filtering and capacitor catching diode

Check whether

power supply of 1389

is normal

Whether clock

signal of MT1389 is

normal

Check power supply circuit

Refer to troubleshooting process of clock circuit

Change 1389

Figure Troubleshooting flow chart for there is sound but no image3.3.2.12

- 49 -

Page 54

13. Troubleshooting process for no screen display is shown as the following figure :3.3.2.13

No screen display

Check whether

voltage of pin 3, 4 of XP505

is normal. FL+ is -16V

and FL- is

-19V.

Check whether

power supply of pin 3 (-21V)

and pin 4 (+5V) of N102

(S0793) are

normal

Change display

screen VFD, DS100 and

check whether they

are OK.

Figure Troubleshooting flow chart for no screen display 3.3.2.13

Check the corresponding power supply circuit

Change N102 (S0793)

- 50 -

Page 55

14. Troubleshooting process for power supply output power not enough is shown as the following

figure :3.3.2.14

Output power of power supply is not enough

Only one channel’s output power of power supply is not enough

Change this channel

Several channels’ output power of power supply are not enough

Change filter capacitor of this channel

rectification diode

and check whether

it is normal

Insert decode board

and check whether

310V voltage exists

on TC501

Change D509 and check whether it is normal

Figure 3.3.2.14 Troubleshooting flow chart for “Output power of power supply is not enough”

Whether it is normal after changing TC501

Change TC509, C510 and check

whether it is normal

Change U501 (5L0380)

1. Check whether earth capacitor, such asTC513

is electrical leakage or short circuit

2. Change 5L0380

3. Check feedback loop

Change D506, TC502

and C504 and check

whether it is normal

1. Check rectification diode on bridge circuit

2. Check other circuits

- 51 -

Page 56

15. Troubleshooting process for image distortion is shown as the following figure :3.3.2.15

Image distortion

Check clock circuit

Composite video signal distortion

Check whether catching diode VD214 is normal

Check whether matching resistor R107 and C110, C111, L110, L120 in filtering circuit are normal

Change MT1389

Component video distortion

Check whether there is one path output in three paths

Check the catching diode on each component

Change MT1389

All video outputs distortion

Recover factory settings

Check whether clock signal is normal

Check whether power supply of MT1389 is OK

Change MT1389

Note

Figure Troubleshooting flow chart for image distortion3.3.2.15

Note : the process of restoring factory settings is shown as the following figure :3.3.2.16

Open disc tray door

Press SETUP button on remote control

Switch to common setup

Default Press SELECT button twice

Figure Operation flow chart of restoring factory settings

3.3.2.16

- 52 -

Page 57

+28V voltage is on high or low side

P+28V voltage trouble

+28V voltage has no output

Check

whether pin 1

of U505 (KAIM0880)

has been changed

into 310V

Check

whether D510,

D511, D502 is normal

Check R520, R521, C520

Check

whether Tc515,

TC516, TC517, C523 has

electric leakage

Check whether TC501,

bridge rectifier module BD501 is normal

Change

U507 (Tl431)

and check whether it

is normal

Check

whether cathode

of D510 or D511 has

28V voltage

output

Check whether L506 has open circuit

Change

U506 (Hs817)

and check whether it

is normal

Check

whether pin 1

of U505 has 310V

voltage

1. Change

D510, D511 and

check whether they are

normal 2. Change D502

and check whether

it is normal

Change

U505 (KAIM0880)

and check whether it

is normal

1. Check whether TC508 is normal.

2. Check whether BD501 is normal.

3. Check electromagnetic interference filtering circuit and fuse

N N N

Change

U505 (KAIM0880)

and check whether it

is normal

Change

U506 (HS817)

and check whether it

is normal

1. Check power supply circuit on pin 3 of U505

2. Check transformer

Check power supply circuit and absorption circuit on pin 3 of U505

and check whether it

Change

U507 (Tl431)

is normal

- 53 -

Figure 3.3.2.17 Troubleshooting flow chart for P+28V voltage

Change

16. Troubleshooting process for P+28V voltage is shown as the following figure 3.3.2.17:

Page 58

No voltage output

Each path has no voltage output

Note

Check

whether TC501

has 310V voltage

Only one path has no voltage output

Find which path has no output

Check

whether cathode

of rectifier diode has

voltage

1. Check whether inductor has open circuit

2. If there is voltage regulator, check whether it is normal after changing voltage regulator

1. Check fuse

2. Check bridge circuit rectifier diode

3. Check element on electromagnetic interference filter circuit

Several paths have no voltage output

Check whether filter capacitor has electric leakage

after changing rectifier

Whether

it is normal

diode

Note

Check

whether cathode

board of D505 has 3.3V

voltage

Check

whether R508,

R509, C513, R513 are

normal

Change

U503 (TL431)

and check whether it is

normal

Change

DV505 and

check whether it is

normal

Change corresponding element

N N

Change

U502 (2501)

and check whether it is

normal

Check whether C509, TC508, TC509 has electric leakage or short circuit

Check feedback loop and other relevant element

- 54 -

Figure 3.3.2.18 Troubleshooting flow chart for no voltage output

Check

whether R502,

C503, D502, R505, C502,

TC502 have short circuit

or electric

leakage

N N N N

17. Troubleshooting process for no voltage output is shown as the following figure 3.3.2.18:

Change corresponding element

Change

U501 (5L00380)

and check whether it is

normal

Change

U502 (HS817)

and check whether it is

normal

Change

U503 (TL431)

and check whether it is

normal

Change transformer

Page 59

All external outputs have no sound

Whether power

supply of N5 (CD4052),

N7 (CS5340) N4

(7AHCT125)

is normal

Check power supply circuit

No sound for external input

No sound for tuning

Change tuner

and check whether it

is normal

(CD4052) and check

Change N5

whether it is normal

1. Whether pin 20 of XS207 is high level (3.3V)

2. Whether V5 and V6 are normal

3. Check other peripherical circuit of TV6

Check whether

pin 7 and 14 of N6

(SAA6558) are

about 5V

No sound for external mixed left and right channels

Whether clock

in the place of crystal

oscillator Y2

is 4.3V

Check the path between left/right channel input terminal and XS401

Whether pin 7

and 8 of XS401

have signal

- 55 -

Use

oscillograph to

check whether pin 3, 13

of N5 (CD4052) have

waveform signal

output

Check

whether pin

10, 12 of N7 (CS5340)

have waveform

signal input

Change CD4052

Check the path between N7

(CS5340) and N5 (CD4052)

Check clock circuit in the position of Y2

Change SAA6558

Change N5

(CD4052) and check

whether it is

normal

Figure 3.3.2.19 Troubleshooting flow chart for no sound of external input

Change N7

(CS5340) and check

whether it is

normal

Change N4

(THHCT125) and check

whether it is

normal

Check whether

power supply of N4

(74ACT125) is

normal

Change M2 (TAS5508) and check other circuit

Check power supply circuit

Change N4 (74ACT125)

18. Trouble shooting for no sound of external input is shown as the following figure 3.3.2.19:

Change N12 (TAS5508)

Page 60

Power not on

19. Troubleshooting process for power not on is shown as the following figure 3.3.2.20:

Check

whether voltage

of pin 7 (5), pin 4 (3.5V)

and pin 11 (5V) of

XS203 is

normal

Check

whether pin 2 of U206

1.8V voltage

1. Check

whether pin 37

of U207 (FLASH)

has 3.3V.

2. Whether pin 1

of U208 (SDRAM) has 3.3V.

3. Check whether pin 14 of U205 (HCU04) has 3.3V.

4. Whether pin 8 of U202

(24LLC02) has 3.3V

each path output is

abnormal

For power board trouble, refer to troubleshooting process of power board

whether resistance

of R244 and R245

is normal

whether pin 2

of U206 has short circuit

to ground or resistance

changes small

TC218. 2. Whether

C231\C232\C233\

C234C235 has electric

leakage or short

Whether

Check

1.C281,

circuit

Unplug

X203 flat cable,

test on power board and

check whether this path

voltage has

output

Change the corresponding resistor

Change U206 (LM1117MP-ADJ)

Change U206

and check whether it is

Unplug

X203 flat cable

and test whether resistor

to ground of decode board

voltage pin is big

enough

Power supply loop on decode board has short circuit to the ground or filtering capacitor has electric leakage

Change U201 (MT1389)

Output power of power supply

of this path is not enough Refer to troubleshooting process of power board

Check whether conductor on 3.3V power supply circuit is normal

Refer to troubleshooting process of reset circuit

1. Change U205 and check whether it is ok

2. Check relevant element of reset circuit

Check

whether pin 6

of U205 (0HCU04)

has 3.3V

Use

oscillograph to

test whether two ends

of X201 are 27MHZ

frequency

Change the corresponding element

Check

whether pin 5 of

U205 (HCU04) is

low level

Change U205

Check

whether capacitor

C275\C276 has electric

leakage or short

circuit

Change the corresponding capacitor

1. Change

Q320 and check

whether it is ok

2. Change Vd2151 and check whether it is

Change

crystal oscillator

X201 and check

whether it is

Figure 3.3.2.20 Troubleshooting process for power not on

Whether

power is in

after reset by force

Note 1: use a lead to ground any end of

R256 for about 1 second

Refer to reset circuit troubleshooting process

Use

oscillograph to

check whether pin 9

of U207has

pulse

U207 (flash) and check

whether it is ok

Change

U201 (MT1389) and

check whether

it is ok

Change U208 (SDRAM)

Change U202 (24LLC02)

Check

whether pin 2

of U208 (SDRAM) has

pulse

Change

U201 (MT1389)

and check whether it

is ok

Change

U208 (SDRAM)

and check whether

it is ok

Change

flash and check whether

it is ok

Change U201 (MT1389)

- 56 -

Page 61

No disc reading

Check whether the place of XS301, XS303, XS302 is well inserted or oxidated

20. Troubleshooting process for no disc reading is shown as the following figure 3.3.2.21:

Change MT1389

Check

whether C213

has electric leakage or

short circuit to

ground

Change

Change the corresponding element

Change loader

and check whether it is

normal

oscillograph to

test whether the end

close to MT1389 of R204

has waveform

Check

whether the

focus signal path between

MT1389 and U301

(D5954) is

normal

Use

Check

whether power

supply of pin 8 and 7 of

U302 (D5954)

is 5V

Check

whether pin 4

of U302 (D5954) is

1.4V

Check

whether power

supply and clock of MT1389

are normal (refer to trouble

shooting process

of MT1389)

Check power supply circuit

Check

whether power

supply and clock (27MHZ)

of MT1389 are

normal

Change MT1389

1. Check power supply circuit if

power supply is abnormal

2. Check clock circuit whether clock is abnormal

Change MT1389

Whether

laser head and

feed are normal (whether laser

head moves forward and

backward after power

on)

to test whether the end close

Whether

Note

laser head

focus is normal (objective

lens will move upward

and downward

after power

on)

Use

digital oscillograph

to MT1389 of R202

has waveform

Note

Check

whether feed

signal path between

MT1389 and D5954

is normal

Check

whether C211 has

electric leakage or

short circuit

Change

Change the corresponding element

Whether it

normal after changing

U301 (D5954)

1. Change MT1389

2. Check other circuit

Change MT1389

Figure 3.3.2.21 Troubleshooting flow chart for no disc reading

Change MT1389 Check other circuit

Check

whether C210

has short circuit or

electric leakage

Change

1. Change MT1389

2. Check other circuit

Change

U301 (D5954)

and check whether It

is normal

Whether

laser head has laser

emission

whether laser

power control circuit is

Check

normal

Change the corresponding element

Check

whether the

end close to MT1389

of R201 has

pulse

Note

Check

whether main

axis control circuit between

MT1389 and U301

is normal

Check

whether main

axis braking circuit is

normal

Change

U301 (D5954)

and check whether it is

normal

Whether main

axis has rotation

Check

whether the

end close to MT1389 of

MD has trace signal and

check

waveform

Check

whether trace

signal path between MT1389

and U301 is

normal

Change

U301 (D5954)

and check whether it

is normal

Note

1.change MT1389

2. Check other peripherical circuit

Check

whether C213

has electric leakage or

short circuit

Change

Change the corresponding element

Change MT1389

1. Change MT1389

2. Check other circuit

Note , , and are tested when no disc in, disc in and laser head performs default focus and feed acts.

- 57 -

Page 62

Section Four Servicing Parameters

3.4.1 Signal waveform diagram

This section collects signal waveform diagram of audio, video and each unit circuit with the purpose

to help servicing personnel to judge where trouble lies in accurately and quickly to improve servicing

skills. For the difference of oscillograph's type, model and tuner, a certain difference may exist, so the

servicing personnel are expected to pay more attention to check in daily operation.

1. Contrast figure (R2024) of main reset signal VRST# and 3.3V voltage

2. Decode board ADIN waveform diagram

- 58 -

Page 63

3. 1389 main clock signal waveform diagram

4. Contrast figure of TAS5508 reset signal RST and main reset signal URST#, USRT# means

the time required to finish reset is 600ms, RST means reset begins and time is 680ms

5. Waveform of PWM signal outputted by TAS5508 when playing: f=352.78KHZ

- 59 -

Page 64

6. PWM_RL signal, output range is 4.0V, frequency is 384.0KHZ (fixed output does not change

with volume adjustment), waveform of two ends of R103

7. When in external input, main clock of TAS5508 (waveform diagram of pin 4 of N2)

8. Clock of 1389: when playing DVD, waveform of main clock of TAS5508

- 60 -

Page 65

3.4.2 Key point voltage

Key point Position Voltage Remark

DV33 (point A) Diode VD201 cathode 3.3V

TC217 may sends out current from this point

after power failure

Point B Diode VD201 anode 3.3V after reset finishes

After reset finishes, voltage inc reases from 0V

to 3.3V

Point C Pin 5 of reverter 0V after reset finishes

After reset finishes, voltage decreas es from

3.3V to 0V

URST# (point D) Connection place of R256 and R253 3.3V after reset finishes

After reset finishes, voltage inc reases from 0V

to 3.3V

Name

When reading disc

normally

When disc out When disc in

When no disc

TROPEN 0

There is about 1 second 3.3V pulse

when at the moment of disc out

0 0

TRCLOSE 0 0V

There is about 1 second 3.3V pulse when at

the moment of disc out

TROUT 3.41V

3.3V 0V 0V 3.3V

3.3V

TRIN 0

0V 3.3V 3.3V 0V

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

Key point Position Normal working voltage (V) Voltage change when 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

1. Voltage of key point is shown as follows:

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

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

- 61 -

Page 66

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

Signal Function Troubles

DC voltage when no

disc in (V)

Y Brightness of S-VIDEO S-video without picture/picture bright/pict ure dark 0.74

C Chroma of S-VIDEO S-video without color/color distortion 1.48

VIDEO Component video composite signal

Composite video without picture/picture

bright/picture dark

0.74

Y1 Component video brightness signal

Component video without picture/picture

bright/picture dark

0.76

Pb 1.46

Pr 1.75

Component video chroma signal Component video color distortion

- 62 -

Page 67

Section Five Function Introduction to IC

3.5.1 function introduction to MT1389E

1. DESCRIPTION

MT1389E is a cost-effective DVD system-on-chip (SOC) which incorporates advanced features like

MPEG-4 video decoder, high quality TV encoder and state-of-art de-interlace processing.

Based on MediaTek’s world-leading DVD player SOC architecture, the MT1389E is the 3rd generation of the DVD player SOC. It integrates the MediaTek 2nd generation front-end analog RF amplifier and the Servo/MPEG AV decoder.

To enrich the feature of DVD player, the MT1389 equips a simplified MPEG-4 advanced simple profile (ASP) video decoder to fully support the DivX1 Home Theater profile. It makes the MT1389-based DVD player be capable of playback MPEG-4 content which become more and more popular.

The progressive scan of the MT1389E utilized advanced motion-adaptive de-interlace algorithm to achieve the best movie/video playback. It also supports a 3:2 pull down algorithm to give the best film effect. The 108MHz/12-bit video DAC provides users a whole new viewing experience.

2. Key Features RF/Servo/MPEG Integration Embedded 6ch Audio DAC Embedded 2ch Audio ADC for Karaoke High Performance Audio Processor High Performance Progressive Video Processor Support Nero-Digital High Quality 108MHz/12-bit, 4 CH TV Encoder

3. General Feature lists (1)Integration DVD player single chip High performance analog RF amplifier Servo controller and data channel processing MPEG-1/MPEG-2/JPEG video Dolby AC-3/DTS Decoder Unified memory architecture

-63 -

Page 68

Versatile video scaling & quality enhancement OSD & Sub-picture Built-in clock generator Built-in high quality TV encoder Built-in progressive video processor Audio effect post-processor Built-in 5.1-ch Audio DAC Built-in 2-ch Audio ADC for Karaoke

(2)High Performance Analog RF Amplifier Programmable fc Dual automatic laser power control Defect and blank detection RF level signal generator

(3)Speed Performance on Servo/Channel Decoding DVD-ROM up to 4XS CD-ROM up to 24XS

(4)Channel Data Processor Digital data slicer for small jitter capability Built-in high performance data PLL for channel data demodulation EFM/EFM+ data demodulation Enhanced channel data frame sync protection & DVD-ROM sector sync protection

(5)Servo Control and Spindle Motor Control Programmable frequency error gain and phase error gain of spindle PLL to control spindle motor on CLV

and CAV mode

Built-in ADCs and DACs for digital servo control Provide 2 general PWM Tray control can be PWM output or digital output

(6)Embedded Micro controller Built-in 8032 micro controller Built-in internal 373 and 8-bit programmable lower address port 1024-bytes on-chip RAM Up to 2M bytes FLASH-programming interface

-64 -

Page 69

Supports 5/3.3-Volt. FLASH interface Supports power-down mode Supports additional serial port

(7)DVD-ROM/CD-ROM Decoding Logic High-speed ECC logic capable of correcting one error per each P-codeword or Q-codeword Automatic sector Mode and Form detection Automatic sector Header verification Decoder Error Notification Interrupt that signals various decoder errors Provide error correction acceleration

(8)Buffer Memory Controller Supports 16Mb/32Mb/64Mb SDRAM Supports 16-bit SDRAM data bus Provides the self-refresh mode SDRAM Block-based sector addressing

(9)Video Decode Decodes MPEG1 video and MPEG2 main level, main profile video (720/480 and 720x576) Decodes MPEG-4 Advanced Simple Profile Support DivX 3.11/4.x/5.x Home Theater Profile Support Nero-Digital Smooth digest view function with I, P and B picture decoding Baseline, extended-sequential and progressive JPEG image decoding Support CD-G titles

(10)Video/OSD/SPU/HLI Processor Arbitrary ratio vertical/horizontal scaling of video, from 0.25X to 256X 65535/256/16/4/2-color bitmap format OSD, 256/16 color RLC format OSD Automatic scrolling of OSD image

(11)Audio Effect Processing Dolby Digital (AC-3)/EX decoding DTS/DTS-ES decoding MPEG-1 layer 1/layer 2 audio decoding MPEG-2 layer1/layer2 2-channel audio

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High Definition Compatible Digital (HDCD) Windows Media Audio (WMA) Dolby ProLogic II Concurrent multi-channel and downmix out IEC 60958/61937 output PCM / bit stream / mute mode Custom IEC latency up to 2 frames Pink noise and white noise generator Karaoke functions Microphone echo Microphone tone control Vocal mute/vocal assistant Key shift up to +/- 8 keys Chorus/Flanger/Harmony/Reverb Channel equalizer

3D surround processing include virtual surround and speaker separation

(12)TV Encoder

Four 108MHz/12bit DACs Support NTSC, PAL-BDGHINM, PAL-60 Support 525p, 625p progressive TV format Automatically turn off unconnected channels Support PC monitor (VGA) Support Macrovision 7.1 L1, Macrovision 525P and 625P CGMS-A/WSS Closed Caption

(13)Progressive Scan Video Automatic detect film or video source 3:2 pull down source detection Advanced Motion adaptive de-interlace

Minimum external memory requirement

(14)Outline

216-pin LQFP package

3.3/1.8-Volt. Dual operating voltages

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4. PIN DESCRIPTION

191

192

212

213

214

215

216

1 AGND Ground Analog ground

2 DVDA Analog input AC couple input path A

3 DVDB Analog input AC couple input path B

4 DVDC Analog input AC couple input path C

5 DVDD Analog input AC couple input path D

Main Alt Type Description

RF interface (26)

RFGND18 Ground Analog ground

RFVDD Power Analog power 1.8V

OSP Analog output RF Offset cancellation capacitor connecting

OSN Analog output RF Offset cancellation capacitor connecting

RFGC Analog output RF AGC loop capacitor connecting for DVD-ROM

Current reference input. It generates reference current for RF

IREF Analog input

path. Connect an external 15K resistor to this pin and AVSS

AVDD3 Power Analog power 3.3V

6 DVDRFIP Analog input AC coupled DVD RF signal input RFIP

7 DVDRFIN Analog input AC coupled DVD RF signal input RFIN

8 MA Analog input DC coupled main beam RF signal input A

9 MB Analog input DC coupled main beam RF signal input B

10 MC Analog input DC coupled main beam RF signal input C

11 MD Analog input DC coupled main beam RF signal input D

12 SA Analog input DC coupled sub-beam RF signal output A

13 SB Analog input DC coupled sub-beam RF signal output B

14 SC Analog input DC coupled sub-beam RF signal output C

15 SD Analog input DC coupled sub-beam RF signal output D

16 CDFON Analog input CD focusing error negative input

17 CDFOP Analog input CD focusing error positive input

18 TNI Analog input 3 beam satellite PD signal negative input

19 TPI Analog input 3 beam satellite PD signal positive input

ALPC (4)

20 MIDI1 Analog input Laser power monitor input

21 MIDI2 Analog input Laser power monitor input

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22 LDO2 Analog output Laser driver output

23 LDO1 Analog output Laser driver output

Reference voltage (3)

28 V2REFO Analog output Reference voltage 2.8V

29 V20 Analog output Reference voltage 2.0V

30 VREFO Analog output Reference voltage 1.4V

Analog monitor output (7)

24 SVDD3 Power Analog power 3.3V

25 CSO RFOP Analog output

1) Central servo

2) Positive main beam summing output

1) RFRP low pass, or

26 RFLVL RFON Analog output

2) Negative main beam summing output

27 SGND Ground Analog ground

31 FEO Analog output Focus error monitor output

32 TEO Analog output Tracking error monitor output

33 TEZISLV Analog output TE slicing Level

Analog Servo Interface (8)

204

205

206

207

208

209

ADCVDD3 Power Analog 3.3V power for ADC

ADCVSS Ground Analog ground for ADC

RFVDD3 Power Analog power

RFRPDC Analog output RF ripple detect output

RFRPAC Analog input RF ripple detect input (through AC-coupling)

HRFZC Analog input High frequency RF fipple zero crossing

210

211

195

196

197

198

199

200

201

CRTPLP Analog output Defect level filter capacitor connecting

RFGND Ground Analog power

RF Data PLL Interface (9)

JITFO Analog output Output terminal of RF jitter meter

JITFN Analog Input Input terminal of RF jitter meter

PLLVSS Ground Ground pin for data PLL and related analog circuitry

IDACEXLP Analog output Data PLL DAC Low-pass filter

PLLVDD3 Power Power pin for data PLL and related analog circuitry

LPFON Analog Output Negative output of loop filter amplifier

LPFIP Analog input Positive input terminal of loop filter amplifier

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202

LPFIN Analog input Negative input terminal of loop filter amplifier

203

LPFOP Analog output Positive output of loop filter amplifier

Motor and Actuator Driver Interface (10)

34 OP_OUT Analog output Op amp output

35 OP_INN Analog input Op amp negative input

36 OP_INP Analog input Op amp positive input

37 DMO Analog output Disk motor control output. PWM output

38 FMO Analog output Feed motor control. PWM output

39 TROPENPW M

Analog output Tray PWM output/Tray open output

3) 1st General PWM output

40 PWMOUT1 ADIN0 Analog output

4) AD input 0 Tracking servo output. PDM output of tracking servo

41 TRO Analog output

compensator Focus servo output. PDM output of focus servo

42 FOO Analog output

compensator

LVTTL3.3 Input,

1) Monitor hall sensor input

(Digital pin)

ADIN1

GPIO

Schmitt input, pull up,

2) AD input 1

with analog input path

3) GPIO

for ADIN1

48 84

DVDD18 Power 1.8V power pin for internal digital circuitry

132 146

DVSS Ground 1.8V ground pin for internal digital circuitry

120

60 87

DVDD3 Power 3.3V power pin for internal digital circuitry

108 137

149

DVSS Ground 3.3V ground pin for internal digital circuitry

54 HIGHA0

General Power/Ground (11)

Micro Controller and Flash Interface (48)

InOut 4~16mA,

Microcontroller address 8

SRPU

66 HIGHA1 InOut 4~16mA, Microcontroller address 9

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SRPU

65 HIGHA2

64 HIGHA3

63 HIGHA4

62 HIGHA5

61 HIGHA6

59 HIGHA7

81 AD7

78 AD6

InOut 4~16mA,

Microcontroller address 10

SRPU

InOut 4~16mA,

Microcontroller address 11

SRPU

InOut 4~16mA,

Microcontroller address 12

SRPU

InOut 4~16mA,

Microcontroller address 13

SRPU

InOut 4~16mA,

Microcontroller address 14

SRPU

InOut 4~16mA,

Microcontroller address 15

SRPU

InOut 4~16mA,

Microcontroller address/data 7

SRPU

InOut 4~16mA,

Microcontroller address/data 6

SRPU

77 AD5

Microcontroller address/data 5

SRPU

InOut 4~16mA,

76 AD4

Microcontroller address/data 4

SRPU

InOut 4~16mA,

75 AD3

Microcontroller address/data 3

SRPU

InOut 4~16mA,

73 AD2

Microcontroller address/data 2

SRPU

72 AD1 InOut 4~16mA, Microcontroller address/data 1

InOut 4~16mA,

Microcontroller address/data 0

71 AD0

SRPU

InOut 4~16mA,

83 IOA 0

Microcontroller address

SRPU

InOut 4~16mA,

69 IOA 1

Microcontroller address 1/ IO

SRPU

47 IOA 2

49 IOA 3

InOut 4~16mA,

Microcontroller address 2/ IO

SRPU

InOut 4~16mA,

Microcontroller address 3/ IO

SRPU

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50 IOA 4

InOut 4~16mA,

Microcontroller address 4/ IO

SRPU

51 IOA 5

52 IOA 6

53 IOA 7

58 A16

82 A17

55 A18

56 A19

YUV0

67 A20

InOut 4~16mA,

Microcontroller address 5/ IO

SRPU

InOut 4~16mA,

Microcontroller address 6/ IO

SRPU

InOut 4~16mA,

Microcontroller address 7/ IO

SRPU

InOut 4~16mA,

SRPU

InOut 4~16mA,

SRPU

InOut 4~16mA,

SRPD,SMT

InOut 4~16mA,

SRPD,SMT

Flash address 16

Flash address 17

Flash address 18 /IO

Flash address 19 /IO

5) Flash address 20 /IO

InOut 4~16mA,

6) While External Flash size <= 1MB:

SRPD,SMT

I) Alternate digital video YUV output 0

YUV7

79 A21

GPIO

80 ALE

70 IOOE#

57 IOER#

68 IOCS#

85 UWR#

86 URD#

88 UP1_2

InOut 4~16mA,

7) Flash address 21 /IO

8) While External Flash size <= 2MB:

SRPD,SMT

I) Digital video YUV output 7 II) GPIO

InOut 4~16mA,

Microcontroller address latch enable

SRPD,SMT

InOut 4~16mA,

Flash output enable, active low / IO

SRPD,SMT

InOut 4~16mA,

Flash write enable, active low / IO

SRPD,SMT

InOut 4~16mA,

Flash chip select, active low / IO

SRPD,SMT

InOut 4~16mA,

Microcontroller write strobe, active low

SRPD,SMT

InOut 4mA,

Microcontroller read strobe, active low

SRPD,SMT

InOut 4~16mA,

Microcontroller port 1-2

SRPD,SMT

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89 UP1_3

InOut 4mA,

Microcontroller port 1-3

SRPD,SMT

91 UP1_4

92 UP1_5

93 UP1_6 SCL

94 UP1_7 SDA

95 UP3_0 RXD

96 UP3_1 TXD

RXD

97 UP3_4

SCL

RXD

98 UP3_5

SDA

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4mA,

SRPD,SMT

InOut 4~16mA,

SRPD,SMT

Microcontroller port 1-4

Microcontroller port 1-5

9) Microcontroller port 1-6

10) I2C clock pin

11) Microcontroller port 1-7

12) I2C data pin

13) Microcontroller port 3-0

14) 8032 RS232 RxD

15) Microcontroller port 3-1

16) 8032 RS232 TxD

17) Microcontroller port 3-4

18) Hardwired RD232 RxD

19) I2C clock pin

20) Microcontroller port 3-5

21) Hardwired RD232 TxD

22) I2C data pin

102

103

153

151

152

IR Input SMT IR control signal input

InOut 4~16mA,

INT0#

Microcontroller external interrupt 0, active low

SRPD,SMT

1) Audio left/right channel clock

2) Trap value in power-on reset: I) 1: use external 373

ALRCK

YUV1

GPO

InOut 4mA,

II) 0: use internal 373

PD,SMT

3) While internal audio DAC used: I) Digital video YUV output 1 II) GPO

4) Audio bit clock

YUV0

InOut 4mA,

5) While internal audio DAC used:

ABCK

GPIO

SMT

I) Digital video YUV output 0 II) GPIO

YUV0

InOut 4mA,

6) Audio DAC master clock

ACLK

GPIO

SMT

7) While internal audio DAC used:

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Page 77

I) Alternate digital video YUV output 0 II) GPIO

8) Audio serial data 0 (Front-Left/Front-Right)

9) Trap value in power-on reset:

154

155

156

ASDATA0

ASDATA1

ASDATA2

YUV2

GPO

YUV4

GPO

YUV5

GPO

InOut 4mA,

PD,SMT

InOut 4mA,

PD,SMT

InOut 4mA,

PD,SMT

I) 1: manufactory test mode II) 0: normal operation

10) While internal audio DAC used: I) Digital video YUV output 2 II) GPO

11) Audio serial data 1 (Left-Surround/Right-Surround)

12) Trap value in power-on reset: I) 1: manufactory test mode II) 0: normal operation

13) While only 2 channels output: I) Digital video YUV output 4 II) GPO

14) Audio serial data 2 (Center/LFE)

15) Trap value in power-on reset: I) 1: manufactory test mode II) 0: normal operation

157

158

159

172

16) While only 2 channels output: I) Digital video YUV output 5 II) GPO

17) Audio serial data 3 (Center-back/ Center-left-back/Center-right-back, in 6.1 or 7.1 mode)

ASDATA3

YUV6 GPIO

InOut 4mA,

18) While only 2 channels output:

PD,SMT

I) Digital video YUV output 6 II) GPIO

19) Microphone serial input

20) While not support Microphone:

MC_DATA

INT2#

YUV0

InOut 2mA,

I) Microcontroller external interrupt 2 II) Digital video YUV output 0 III) GPIO

Output

SPDIF

4~16mA,

S/PDIF output

SR: ON/OFF

AADVSS Ground Ground pin for 2ch audio ADC circuitry

- 73 -

Page 78

173

AKIN2 Analog Audio ADC input 2

174

175

176

177

178

179

180

181

182

183

184

ADVCM Analog 2ch audio ADC reference voltage

AKIN1 Analog Audio ADC input 1

AADVDD Power 3.3V power pin for 2ch audio ADC circuitry

APLLVDD3 Power 3.3V Power pin for audio clock circuitry

APLLCAP Analog InOut APLL external capacitance connection

APLLVSS Ground Ground pin for audio clock circuitry

ADACVSS2 Ground Ground pin for audio DAC circuitry

ADACVSS1 Ground Ground pin for audio DAC circuitry

21) Audio DAC sub-woofer channel output

ARF GPIO Output

22) While internal audio DAC not used: GPIO

23) Audio DAC right Surround channel output

ARS GPIO Output

24) While internal audio DAC not used: GPIO

25) Audio DAC right channel output

26) While internal audio DAC not used:

AR GPIO Output

a. SDATA1

185

186

187

188

189

190

160

161

162

b. GPIO

AVCM Analog Audio DAC reference voltage

27) Audio DAC left channel output 28) While internal audio

AL Output

DAC not used: a. SDATA2 b. GPIO

29) Audio DAC left Surround channel output

ALS Output

30) While internal audio DAC not used: c. SDATA0 d. GPIO

31) Audio DAC center channel output

ALF Output

32) While internal audio DAC not used: GPIO

ADACVDD1 Power 3.3V power pin for audio DAC circuitry

ADACVDD2 Power 3.3V power pin for audio DAC circuitry

Video Interface (12)

DACVDDC Power 3.3V power pin for video DAC circuitry

VREF Analog Bandgap reference voltage

FS Analog Full scale adjustment

163

DACVSSC Ground Ground pin for video DAC circuitry

InOut 4mA,

164

CVBS

Analog composite output

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Page 79

165

DACVDDB Power 3.3V power pin for video DAC circuitry

166

167

168

169

170

171

101

100

193

194

DACVSSB Ground Ground pin for video DAC circuitry

DACVDDA Power 3.3V power pin for video DAC circuitry

InOut 4mA,

Green, Y, SY, or CVBS

Y/G

DACVSSA Ground Ground pin for video DAC circuitry

InOut 4mA,

B/CB/PB

Blue, CB/PB, or SC

InOut 4mA,

R/CR/PR

Red, CR/PR, CVBS, or SY

MISC (12)

InOut

PRST#

Power on reset input, active low

PD,SMT

ICE InOut PD,SMT Microcontroller ICE mode enable

XTALO Output 27MHz crystal output

XTALI Input 27MHz crystal input

VSYN

InOut 4mA,

44 GPIO0

YUV1

SR,SMT

HSYN

InOut 4mA,

45 GPIO1

INT4#

SR,SMT

YUV2

46 GPIO2 SPMCLK InOut 2mA

INT1#

147

GPIO3

InOut 2mA

SPDATA

148

GPIO4 SPLRCK InOut 2mA

INT3#

150

GPIO5

InOut 2mA

SPBCK

33) General purpose IO 0

34) Vertical sync for video input

35) Digital video YUV output 1

36) General purpose IO 1

37) Horizontal sync for video input

38) Microcontroller external interrupt 4

39) Digital video YUV output 2

40) General purpose IO 2

41) Audio S/PDIF SPMCLK input

42) General purpose IO 3

43) Microcontroller external interrupt 1

44) Audio S/PDIF SPDATA input

45) General purpose IO 4

46) Audio S/PDIF SPLRCK input

47) General purpose IO 5

48) Microcontroller external interrupt 3

49) Audio S/PDIF SPBCK input

InOut 4mA,

50) General purpose IO 6

90 GPIO6 YUVCLK

SR,SMT

51) Digital video clock output

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99 GPIO7 YUV3

InOut 4mA,

SR,SMT

52) General purpose IO 7

53) Digital video YUV output 3

Dram Interface (38) (Sorted by position)

145

144

143

142

141

140

139

138

136

135

134

133

131

130

RA4 InOut DRAM address 4

RA5 InOut DRAM address 5

RA6 InOut DRAM address 6

RA7 InOut DRAM address 7

RA8 InOu DRAM address 8

RA9 InOut DRAM address 9

RA11 InOut Pull-Down DRAM address bit 11

CKE Output DRAM clock enable

RCLK InOut Dram clock

RA3 InOut DRAM address 3

RA2 InOut DRAM address 2

RA1 InOut DRAM address 1

RA0 InOut DRAM address 0

RA10 InOut DRAM address 10

129

128

127

126

125

124

123

122

121

119

118

117

116

115

BA1 InOut DRAM bank address 1

BA0 InOut DRAM bank address 0

RCS# Output DRAM chip select, active low

RAS# Output DRAM row address strobe, active low

CAS# Output DRAM column address strobe, active low

RWE# Output DRAM Write enable, active low

DQM1 InOut Data mask 1

RD8 InOut DRAM data 8

RD9 InOut DRAM data 9

RD10 InOut DRAM data 10

RD11 InOut DRAM data 11

RD12 InOut DRAM data 12

RD13 InOut DRAM data 13

RD14 InOut DRAM data 14

114

113

RD15 InOut DRAM data 15

RD0 InOut DRAM data 0

- 76 -

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112

Voltage

RD1 InOut DRAM data 1

111

110

109

107

106

105

104

RD2 InOut DRAM data 2

RD3 InOut DRAM data 3

RD4 InOut DRAM data 4

RD5 InOut DRAM data 5

RD6 InOut DRAM data 6

RD7 InOut DRAM data 7

DQM0 InOut Data mask 0

3.5.2 Function introduction to SDRAM

The function of SDRAM (U211) in the player is to save program taken out by MT1389 from FLASH and information of picture and sound taken out from disc when the player is working to form damping, add the stability of information output and add anti-vibration of the player. The pin function and real voltage are shown as the following table:

Pin Name

1 VDD

2 DQ0 I/O Data bus 0.94 29 MA4

3 VDDQ

4 DQ1 I/O Data bus 0.9 31 MA6

5 DQ2 I/O Data bus 1.3 32 MA7

6 VSSQ

7 DQ3 I/O Data bus 1.2 34 MA9

8 DQ4 I/O Data bus 1.5 35 MA11

9 VDDQ

10 DQ5 I/O Data bus 0.7 37 CKE

11 DQ6 I/O Data bus 0.45 38 CLK

12 VSSQ

Data

direction

　 3.3V power supply 3.18 28 VSS

I/O 3.3V power supply 3.19 30 MA5

　 Ground 0 33 MA8

　 3.3V power supply 3.18 36 NC 　 Blank pin 0.01

　 Ground 0 39 UDQM

Function

Pin Name

(V)

Data

Function

direction

　 Ground 0.01

I Address bus 1.65

I Address bus 1.74

I Address bus 1.49

I Address bus 1.22

I Address bus 0.05

I Address bus 0.04

I Clock enable signal 1.22

I System clock input 1.68

Data in/out screen-shielded

signal

(V)

2.42

13 DQ7 I/O Data bus 0.8 40 NC 　 Blank pin 0.01

14 VDD

　 3.3V power supply 3.14 41 VSS

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　 Ground 0.01

Page 82

15 LDQM

Data in/out screen-shielded

signal

2.46 42 DQ8

I/O Data bus 0.6

16 WE I Write control signal 3.17 43 VDDQ

17 CAS I Line address gating signal 3.01 44 DQ9

18 RAS I Row address gating signal 3.13 45 DQ10

19 CS I Chip selection signal 2.95 46 VSSQ

20 SD-BS0

21 SD-BS1

22 MA10

23 MA0 I Address bus 0.36 50 DQ13

24 MA1 I Address bus 0.35 51 DQ14

25 MA2 I Address bus 2.38 52 VSSQ

26 MA3 I Address bus 1.59 53 DQ15

27 VDD

I Address bus 0.04 49 VDDQ

Section address 0 gating

1.8 47 DQ11

signal

Section address 1 gating

2 48 DQ12

signal

　 3.3V power supply 3.19 54 VSS

　 3.3V power supply 3.19

I/O Data bus 0.91

I/O Data bus 0.8

　 Ground 0.01

I/O Data bus 0.79

I/O Data bus 1.16

　 3.3V power supply 3.19

I/O Data bus 1.15

I/O Data bus 1.24

　 Ground 0.01

I/O Data bus 0.68

　 Ground 0.01

3.5.3 Function introduction to FLASH

FLASH (U214) is a 16Mbit FLASH memorizer, and the damage of U214 may cause troubles, such as power not on, no disc reading and power on picture mosaic. Pin function is shown as the following table:

Pin Name Function Voltage (when no disc) Data direction

1-9、16-25、48 AO-A19

11 WE Write enable signal, low level is effective 3.23V I 12 RESET

10、13、14 NC Blank pin 　　

15 RY/BY Ready/system busy 3.23V O 26 CE Chip enable, low level effective 0V I

27、46 VSS Ground 　　

28 OE Output enable signal , low level is effective 0V I

20 bit address bus 　 I

Reset, low level is effective 3.23V I

29-3、6、38-44 DQ0-DQ14

15 bit data bus 　 O

37 VCC 5V power supply +5V 　

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Page 83

45 DQ15/A-1

CD disc voltage

connected to reference voltage

Take word extend mode as data line, and bit

　 I/O

extend mode as address line

47 BYTE

16-bit output and low level is 8-bit output

3.5.4 Function introduction to D5954

D5954 is a servo drive IC with built-in 4-channel drive circuit. Digital focus, trace, feed and main axis drive signal outputted by MT1389 is sent to D5954 for amplifying through RC integration circuit. The focus, trace, feed and main axis drive signal being amplified by D5954 is sent to MT1389 to fulfil the

Select 8-bit or 16-bit output mode. High level is

Pin Name Function

1 VINFC Focus control signal input 1.41 1.4 1.45

2 CF1 External feedback loop 2.3 2.54 2.43

3 CF2 External feedback loop 2.01 2.56 2.43

4 VINSL+ Forward control input,

Voltage when

no disc (V)

1.41 1.42 1.42

DVD disc

voltage (V)

(V)

5 VINSL- Main axis control signal input 1.4 1.42 1.42

6 VOSL External feedback resistor 1.4 1.17 1.21

7 VINFFC Focus feedback signal input 1.92 2.59 2.36

8 VCC 5V power supply 5.38 5.04 5.01

9 PVCC1 5V power supply 5.38 5.04 5.03

10 PGND Ground 0.01 0.01 0.01

11 VOSL- Main axis drive reverse voltage output 1.87 3.71 3.54

12 VO2+ Main axis drive forward direction voltage output 1.87 1.24 1.4

13 VOFC- Focus drive reverse voltage output 3.3 2.6 2.33

14 VOSC+ Focus drive forward voltage voltage output 3.3 2.46 2.68

15 VOTK+ Trace drive forward direction voltage output 3.39 2.56 2.51

16 VOTK- Trace drive reverse voltage output 3.52 2.48 2.51

17 VOLD+ Feed drive forward direction voltage output 0.93 2.56 2.5

18 VOLD- Feed drive reverse voltage output 0.93 2.59 2.62

19 PGND Ground 0.01 0.01 0.01

20 VINFTK Trace feedback signal input 3.73 2.5 2.53

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Page 84

21 PVCC2 5V power supply 5.38 5.08 5.07

22 PREGND Ground 0 0.01 0.01

23 VINLD Feed control signal input 1.4 1.41 1.4

24 CTK2 External feedback loop 2.41 2.52 2.53

25 CTK1 External feedback loop 2.51 2.52 2.53

26 VINTK Trace control signal input 1.42 1.42 1.41

27 BIAS 1.4V reference voltage input 1.41 1.42 1.42

28 STBY Enable control signal 0 3.18 3.19

3.5.5 Function introduction to 24LLC020

1. State memorizer 24LLC02 (U202) is a writable and programmable read-only memorizer, with its casing

and pin function shown as the following figure 3.5.5.1:

Figure 3.5.5.1 Casing and pin function introduction

2. The function of 24LLC02 in this model is to keep some setup status of machine, such as system information of sound and language selection, not losing after power on and still keeping the information set last time when power on the next time. The circuit schematic diagram is shown as the figure3.5.5.2:

Figure 3.5.5.2 Circuit schematic diagram

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Page 85

3. Pin function is shown as the following table:

Pin 4 of N2 (SN74LVC2G04DBVR)

Pin Name Voltage in actual test Pin Name Voltage in actual test

1 DC/NC 0 5 SDA 3.21

2 RST _/NC 0 6 SCL 0

3 WP/RST 0 7 WP 0.29

4 VSS 0 8 VCC 3.21

Note: when playing DVD, CD disc and no disc in, the measured voltage are all the same, in which pin 7 is

protection-write pin, unused.

3.5.6 Function introduction to 74HCT125

1. 74HCT125 (N3, N4) is a 4-channel gating switch, and each channel has its own gating signal, in which pin 1, 4, 10 and 13 are gating control pins, gating when in low level and off when in high level. 74HCT125 truth value table and function module structure is shown as the figure 3.5.6.1:

INPUTS

NA NOE NY

H L H L L L X H Z

H: means high level (3.3V) L: means low level (0V) X: means any state Z: means that is off and cannot be selected

Figure 3.5.6.1 Truth value table and 74HCT125 function module structure

OUTPUTS

2. Pin function of N3 (74HCT125) is shown as the following table:

Contiguous

signal name

Data direction

Function description

Directly contiguous element or

signal

1 M1 I Clock gating signal M1

2 MCLK I Clock signal input

3 MCLK O Clock signal output R70

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4 M0 I Left/right channel digital audio gating signal M0

5 SDATA0 I Left/right channel digital audio signal input R29

6 SDA LR O Left/right channel digital audio signal output R101

7 GND P Ground Ground

8 SDA SLSR O Surround left/right channel digital audio signal output

9 SDATA1 I Surround left/right channel digital audio signal input

10 M0 I Surround left/right channel digital audio gating signal

11 SDA CSW O Centre subwoofer digital audio signal output R98

12 SDATA2 I Centre subwoofer digital audio signal input R59

13 M0 I Centre subwoofer digital audio gating signal M0

14 VCC P 3.3V power supply Power supply

R100

R56

3. Pin function of N4 (74HCT125) is shown as the following table:

Pin Contiguous signal name Data direction

1 M0 I External clock gating signal M0

2 SACLK I External clock signal input SACLK

3 MCLK O External clock signal output R70

4 M0 I Bit clock gating signal M0

Function description Directly contiguous element or signal

5 SBCLK I Bit clock signal input SBCLK

6 SCLK O Bit clock signal output R97

7 GND P Ground Ground

8 LRCK O Left/right channel clock signal output

9 SLRCK I Left/right channel clock signal input SLRCK

10 M0 I Left/right channel clock gating signal

11 SDA AD O External digital audio signal output

12 SDA I External digital audio signal input R225

13 M1 I External digital audio gating signal

14 VCC P 3.3V power supply Power supply

R96

R99

4. Through the gating to 74HCT125, M0, M1 signal outputted from MT1389 realize the selection to internal and external signal. The function table is shown as follows:

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M0 Function Remark

t when forbidden end his high level

0 Internal signal Disc signal, MIC signal

1（3.3V）

1 unused 　

0 unused 　

External signal Tuner, external input

3.5.7 Function introduction to CD4052

Cd4052 is a 2-group 4-channel data selector used to select external input audio signal, microphone signal

or tuner audio signal.

1. Pin function is shown as the following table:

Pin Name Function Data direction

1, 2, 4, 5 Y0-Y3 Y signal input I

11, 12, 14, 15 X0-X3 X signal input I

3, 13 Y Y signal output O

6 INH Two groups both have no outpu

7 VEE (minus) 12V power supply 　

8 VSS Ground 　

16 VDD 5V power supply 　

9, 10 B, A Gating signal I

13 X X signal output O

2. Signal A, B gating conditions are shown as the following table:

A B OUTPUT

0 0 unused

0 1 MIC (microphone)

1 0 AUX (external audio input)

1 1 TUNER headphone

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3.5.8 Function introduction to SAA6588

SAA6588 tuning data processing chip and pin function are shown as the following table:

Pin Name

MPO

MPTH

TCON

OSCO

5 OSCI

6 VSSD

7 VDDD

8 DAVN

9 SDA

10 SCL

Data

direction

O Multi-path rectifier output unused 11 PSWN

O Multi-path detector output unused 12 MAD 　 Attached address input Ground

I Detect control signal Ground 13 AFIN 　 Audio signal input unused

I Clock signal input 　 14 VDDA

O Clock signal output 　 15 VSSA

　 Digital 　 16 MPX I Multiple signal input 　

　 Digital power supply voltage

O Data effective output 　 18 SCOUT

I/O

I Series control clock input

Function Remark Pin Name

　 17 VREF

Series control data

　 19 CIN I Comparator input 　

input/output

　 20 LVIN I Standard input terminal unused

Data

Function Remark

direction

O Pause switch output unused

　 Analog power supply voltage

　 Analog 　

　 Reference voltage output

O Wave path filtering output

3.5.9 Function introduction to CS5340

1. Description

CS5340 is a kind of complete A/D converter used in digital audio system. It has sampling, A/D conversion and anti-aliasing filtering function, and can generate 24-bit sampling frequency to left and right channels with serial value of each channel up to 2000 KHz. A 5-step multi-bit DELTA-SIGMA modulator is adopted, with digital filtering and simplification function, so external anti-aliasing filter is not needed. It is specially applicable for audio system required wide dynamic range, Hi-Fi and low noise.

2. Features

# Support all sampling frequency including 192 KHZ

# Dynamic range is 101dB when voltage is 5V

# -94 dB THD+N

# Highpass filter may remove DC offset

# Low delay digital filter

# Power consumption is 90 milliwatt under 3.3V power supply

# A/D inner core power supply voltage is 3.3V ~ 5V

# Support 1.8V ~ 5V logic level

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# Auto mode selection

# Compatible with CS5341 pin

3.Pin function of CS5340 is shown as the following table:

1 M0 I Mode selection Decide the operation mode of element

2 MCLK I Main clock

3 VL I Logic power supply Forward power supply of digital input/output

4 SDOUT O Series audio data output Two's complement of output series audio data

5 GND 　 Analog 　

6 VD I Digital power supply Provide forward power supply for digital part

7 SCLK I/O Series clock Provide series clock for series audio interface

8 LRCK I/O Left/right clocl Left/right audio time sequence control clock

9 RST I Reset Element enters a low-consumption state when in low level

Name Data direction

AINL I Analog input 　

VQ O Static voltage 　

AINR I Analog input 　

VA I Analog power supply Provide forward power supply for analog part

Function Remark

Δ-δclock source of adjustor and digital filter

14 REF_GND

FILT+ I Forward reference voltage 　

M1 I Mode selection Decide the operation mode of element

　 Reference Provide reference ground for internal sampling circuit

3.5.10 Function introduction to 4558/4580

4558/4580 includes two integrated operational amplifiers inside, with pin function shown as follows:

Pin Data direction

1 O Output of operational amplifier A 5 O Output of operational amplifier B

Negative input terminal of operational

2 I

Positive input terminal of operational

3 I

4 I (minus) 12V voltage input 8 I 12V voltage input

Function Pin Data direction

6 I

amplifier A

7 I

amplifier A

Function

Negative input terminal of operational

amplifier B

Positive input terminal of operational

amplifier B

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3.5.11 Function introduction to TLV272

TLV272 includes two integrated operational amplifiers inside, with pin function shown as follows:

Pin Name

1 1OUT

2 1IN- I

3 1IN+ I

4 GND I Common 8 VDD

Data

Function Pin Name

direction

O Output of operational amplifier A

Negative input terminal of operational

amplifier A

Positive input terminal of operational

amplifier A

5 2IN+

6 2IN- I

7 2OUT

Data

Function

direction

O Output of operational amplifier B

Negative input terminal of operational

amplifier B

Positive input terminal of operational

amplifier B

I 5V voltage input

3.5.12 Function introduction to TAS5508

TAS5508 is a digital pulse width modulator (PWM) developed by TI Company, which performs PWM modulation to audio digital signal (SDATA0, SDATA1, SDATA2) outputted by Mt1389 to modulates audio signal onto load wave. This player generates 10-path audio signal output in all, that is headphone left/right channel, AV board mixed left/right channel, surround left/right channel, front left/right channel, centre channel and subwoofer channel. The sound volume is bigger, space occupation patio is smaller; and sound volume is smaller, space occupation ration is bigger. It mat realize self-protection function. If voltage and current of the back stage circuit is too high, it will close automatically to avoid damaging element. Function of each pin is shown as follows:

Pin Name Data direction Function

1 VRA-PLL 　 Reference voltage of PLL analog power supply 1.8V

2 PLL AO PLL-FLT-RET.PLL external filtering loop

3 PLL-FLTM AO PLL negative input

4 PLL-FLTP AI PLL positive input

5 AVSS 　 Analog ground

6 AVSS 　 Analog ground

7 VRD-PLL 　 Reference voltage of PLL digital power supply 1.8V

8 AVSS-PLL 　 PLL analog ground

9 AVDD-PLL 　 PLL3.3V power supply

10 VBGAP 　 Bandwidth gap reference voltage

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11 RESET DI TAS5508 reset signal

12 HP-SEL DI Headphone/microphone selection bit

13 PDN DI Power failure control bit

14 MUTE DI Mute control bit

15 DVDD 　 Digital 3.3V power supply

16 DVSS 　 Digital ground

17 VR-DPLL 　 Reference voltage of digital PLL power supply 1.8V

18 OSC-CAP AO Oscillator capacitor connection end

19 XTL-OUT AO Clock signal output

20 XTL-IN AI Clock signal input

21 RESERVED 　 Connect digital signal ground

22 RESERVED 　 Connect digital signal ground

23 RESERVED 　 Connect digital signal ground

24 SDA DI/DO Series control data input/output

25 SCL DI Series control clock

26 LRCLK DI Left/right audio control clock

27 SCLK DI Series audio control clock

28 SDIN4 DI Left/right channel audio data input

29 SDIN3 DI Surround left/right channel audio data input

30 SDIN2 DI Microphone/external left/right channel audio data input

31 SDIN1 DI Centre/subwoofer audio data input

32 PSVC 　 Power supply controlled by bandwidth modulation volume

33 VR-DIG 　 Reference voltage of digital kernel power supply 1.8V

34 DVSS 　 Digital ground

35 DVSS 　 Digital ground

36 DVDD 　 Digital 3.3V power supply

37 BKND-ERR DI External chip TAS5512 correction signal input

38 DVSS 　 Digital ground

39 VALID DO Output external chip TAS5512 reset signal

40 PWM-M-1 DO Power amplifier left channel PWM output (negative end)

41 PWM-P-1 DO Power amplifier left channel PWM output (positive end)

42 PWM-M-2 DO Power amplifier right channel PWM output (negative end)

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43 PWM-P-2 DO Power amplifier right channel PWM output (positive end)

44 PWM-M-3 DO Power amplifier surround left channel PWM output (negative end)

45 PWM-P-3 DO Power amplifier surround left channel PWM output (positive end)

46 PWM-M-4 DO Power amplifier surround right channel PWM output (negative end)

47 PWM-P-4 DO Power amplifier surround right channel PWM output (positive end)

48 VR-PWM 　 Reference voltage of digital bandwidth modulation 1.8V

49 PWM-M-7 DO Power amplifier centre PWM output (negative end)

50 PWM-P-7 DO Power amplifier centre PWM output (positive end)

51 PWM-M-8 DO Power amplifier subwoofer PWM output (negative end)

52 PWM-P-8 DO Power amplifier subwoofer PWM output (positive end)

53 DVSS-PWM 　 Bandwidth modulation digital ground

54 DVDD-PWM 　 Bandwidth modulation digital 3.3V power supply

55 PWM-M-5 DO Mixed left channel PWM output (negative end)

56 PWM-P-5 DO Mixed left channel PWM output (positive end)

57 PWM-M-6 DO Mixed right channel PWM output (negative end)

58 PWM-P-6 DO Mixed right channel PWM output (positive end)

59 PWM-HPML DO PWM output (negative end)

60 PWM-HPPL DO PWM output (positive end)

61 PWM-HPMR DO PWM output (negative end)

62 PWM-HPPR DO PWM output (positive end)

63 MCLK DI 　

64 RESERVED 　　

3.5.13 Function introduction to TAS5112

TAS5112 is a high performance digital amplifier designed by TI Company. In model DK1020S, two TAS5112 are used to demodulate and amplify digital audio signal after pulse width demodulation and outputted by TAS5508. Each generates 3-channel outputs, that is surround left/right channel, subwoofer channel and front left/right/centre channel. TAS5112 is usually used together with TAS5508. If TSA5508 has trouble, it will provide a feedback signal for TAS5508 to make TAS5508 close and not output signal any more to avoid damaging element.

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1. Function of each pin of N3 (TAS5112) is shown as follows:

Pin Name Data direction Function Remark

1 GND 　 Common 　

2 GND 　 Common 　

3 GREG 　 Door drive voltage regolator decoupling pin 　

4 OTW O Chip over heat alarm output 　

5 SD-CD O Off label position of surround left/right channel Refer to table 3

6 SD-AB O Off label position of subwoofer power amplifier Refer to table 3

7 PWM-DP I Surround left channel PWM positive signal input 　

8 PWM-DM I Surround left channel PWM negative signal input 　

9 RESET-CD I Surround left/right channel power amplifier reset signal Refer to table 3

10 PWM-CM I Surround right channel PWM negative signal input 　

11 PWM-CP I Surround right channel PWM positive signal input 　

12 DREG-RIN 　 Digital power supply regulator decoupling loop pin 　

13 M3 I Output mode selection bit Refer to table 2

14 M2 I Protection mode selection bit Refer to table 1

15 M1 I Protection mode selection bit Refer to table 1

16 DREG 　 Digital power supply regulator decoupling loop pin 　

17 PWM-BP I Subwoofer PWM positive signal input 　

18 PWM-BM I Subwoofer PWM negative signal input 　

19 RESET-AB I Subwoofer power amplifier reset signal Refer to table 3

20 PWM-AM I Subwoofer PWM positive signal input 　

21 PWM-AP I Subwoofer PWM negative signal input 　

22 GND 　 Common 　

23 DGND 　 Digital input/output reference ground 　

24 GND 　 Common 　

25 DVDD 　 Input/output power supply voltage 3.3V 　

26 GREG 　 Door drive voltage regulator decoupling pin 　

27 GND 　 Common 　

28 GND 　 Common 　

29 GND 　 Common 　

30 GVDD 　 Door drive and digital regulator power supply end 　

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31 BST-A 　 High-side bootstrap supply(BST) 　

32 PVDD-A 　 Subwoofer negative end power supply 　

33 PVDD-A 　 Subwoofer negative end power supply 　

34 OUT-A O Subwoofer negative end output 　

35 OUT-A O Subwoofer negative end output 　

36 GND 　 Common 　

37 GND 　 Common 　

38 OUT-B O Subwoofer power amplifier positive output 　

39 OUT-B O Subwoofer power amplifier positive output 　

40 PVDD-B 　 Subwoofer power amplifier positive power supply 　

41 PVDD-B 　 Subwoofer power amplifier positive power supply 　

42 BST-B 　 High-side bootstrap supply(BST) 　

43 BST-C 　

44 PVDD-C 　 Surround right channel power supply 　

45 PVDD-C 　 Surround right channel power supply 　

46 OUT-C O Surround right channel output 　

47 OUT-C O Surround right channel output 　

48 GND 　 Common 　

49 GND 　 Common 　

50 OUT-D O Surround left channel output 　

51 OUT-D O Surround left channel output 　

52 PVDD-D 　 Surround left channel power supply 　

53 PVDD-D 　 Surround left channel power supply 　

54 BST-D 　 HS　 bootstrap　 supply (BST) 　

55 GVDD 　 Door drive and digital regulator power supply end 　

56 GND 　 Common 　

HS　 bootstrap　 supply（BST）

2. Each function pin of N4 (TAS5112) is shown as follows:

Pin Name Data direction Function Remark

1 GND 　 Common 　

2 GND 　 Common 　

3 GREG 　 Door drive voltage regulator decoupling pin 　

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4 OTW O Chip over heat alarm output 　

5 SD-CD O Off label position of centre power amplifier Refer to table 3

6 SD-AB O Off label position of left/right channel power amplifier Refer to table 3

7 PWM-DP I Centre PWM positive signal input 　

8 PWM-DM I Centre PWM negative signal input 　

9 RESET-CD I Centre power amplifier reset signal Refer to table 3

10 PWM-CM 　 unused 　

11 PWM-CP 　 unused 　

12 DREG-RIN 　 Digital power supply regulator decoupling loop pin 　

13 M3 I Output mode selection bit Refer to table 2

14 M2 I Protection mode selection bit Refer to table 1

15 M1 I Protection mode selection bit Refer to table 1

16 DREG 　 Digital power supply regulator decoupling pin 　

17 PWM-BP I Left channel PWM positive signal input 　

18 PWM-BM I Left channel PWM negative signal input 　

19 RESET-AB I Left/right channel power amplifier reset signal Refer to table 3

20 PWM-AM I Right channel PWM positive signal input 　

21 PWM-AP I Right channel PWM negative signal input 　

22 GND 　 Common 　

23 DGND 　 Digital input/output reference ground 　

24 GND 　 Common 　

25 DVDD 　 Input.output power supply voltage 3.3V 　

26 GREG 　 Door drive voltage regulator decoupling pin 　

27 GND 　 Common 　

28 GND 　 Common 　

29 GND 　 Common 　

30 GVDD 　 Door drive and digital regulator power supply end 　

31 BST-A 　 High-side　 bootstrap　 supply (BST) 　

32 PVDD-A 　 Right channel power amplifier power supply 　

33 PVDD-A 　 Right channel power amplifier power supply 　

34 OUT-A O Right channel power amplifier output 　

35 OUT-A O Right channel power amplifier output 　

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36 GND 　 Common 　

37 GND 　 Common 　

38 OUT-B O Left channel power amplifier output 　

39 OUT-B O Left channel power amplifier output 　

40 PVDD-B 　 Left channel power amplifier power supply 　

41 PVDD-B 　 Left channel power amplifier power supply 　

42 BST-B 　 High-side　 bootstrap　 supply (BST) 　

43 BST-C 　 HS　 bootstrap　 supply (BST) 　

44 PVDD-C 　 28.5V power supply 　

45 PVDD-C 　 28.5V power supply 　

46 OUT-C 　 unused 　

47 OUT-C 　 unused 　

48 GND 　 Common 　

49 GND 　 Common 　

50 OUT-D O Centre power amplifier output 　

51 OUT-D O Centre power amplifier output 　

52 PVDD-D 　 Centre power amplifier power supply 　

53 PVDD-D 　 Centre power amplifier power supply 　

54 BST-D 　 HS　 bootstrap　 supply (BST) 　

55 GVDD 　 Door drive and digital regulator power supply end 　

56 GND 　 Common 　

3. Table 1 is shown as follows:

M1 M2 Protection mode selection

0 0 Auto error correction mode

0 1 Error detection off mode

1 0 Protection system ineffective mode

1 1 none

4. Table 2 is shown as follows:

M3 Output mode selection

0 Bridge binding load output mode

1 none

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5. Table 3 is shown as follows:

SD RESET Function description

0 0 none

0 1 Device in protection mode

1 0 Device set in high impedance state

1 1 normal working

3.5.14 Function introduction to 5L0380

Pin 3 of 5L0380 is controlled by feedback pin 4 to make it on for a while and off for another while to form pulse DC to control coupling quantity of transformer. When secondary output voltage of transformer is on the high side, under the control of pin 4, disconnection time of pin 3 gets longer and coupling quantity of transformer decreases to make output voltage get lower gradually; when secondary output voltage of transformer is on the low side, disconnection time of pin 3 gets shorter, connection time gets longer (connect inside 5L0380), coupling quantity of transformer decreases and secondary output voltage gets larger gradually. Pin function is shown as the following table:

Pin Function Voltage Remark

1 Grounding 0 　

2 Voltage supply 16V supply voltage for 5L0380 after starting up

3 310V power supply input 310V 　

4 Control of space occupation ratio to pulse width 　　

3.5.15 function introduction to LM431A

U503 (LM431A) is a 2.5V comparator, shown as the figure 3.5.15.1. Compared the inputted voltage of R end with 2.5V, when voltage of R end is more than 2.5V, KA end is on and photoelectric coupler starts to send out photocurrent; when voltage of R end is less than 2.5V, KA end is cutoff and photoelectric coupler does not send out photocurrent. CPU+3.3V in power board circuit must be kept in 3.3V, for the function of comparator. No matter more than or less than 3.3V, through on and off status of comparator, it will control the on state of the output end of photoelectric coupler LM431A to adjust the output space occupation ratio of switch module to control the output voltage of transformer and masthead the power supply of the whole system.

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Figure 3.5.15.1 LM431A outside drawing

3.5.16 Function introduction to HS817

U502 (HS817) is a photoelectric coupler, shown as the figure 3.5.16.1.The right side is a light emitting diode, which sends out light of different intensity according to the strength of voltage inputted from the right side, generates photocurrent of different intensity on the left side according to light of different intensity, and outputs from position D. The higher of the voltage inputted from the right side, the stronger of the light emitted from light emitting diode and the larger of the photocurrent produced from position D. The lower of the voltage inputted from the right side of photoelectric coupler, the weaker of the light emitted from light emitting diode and the weaker of the current outputted from position D.

Figure 3.5.16.1 Hs817 outside drawing

3.5.17 Function introduction to Pt2579

1. Description

PT2579 is a Radio Data System Demodulator IC utilizing CMOS Technology specially designed for radio

data system applications. The RDS data signal (RDDA) and the RDS clock signal (RDCL) are provided as outputs for further processing by an ideal decoder / microcontroller. Anti-aliasing Filter (2nd order), 57kHz

band pass filter (8th order), reconstruction filter (2nd order), clocked comparator with automatic offset compensation, biphase symbol decoder, differential decoder, signal quality detector are all built into a single chip having the highest performance and reliability. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages.

.2. Features

# CMOS Technology

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# Low Power Consumption

# Anti-Aliasing Filter (2nd Order)

# Reconstruction Filter (2nd Order)

# 57kHz Band-Pass Filet (8th Order)

# 57kHz Carrier Regeneration

# Differential Decoder

# Signal Quality Detector

# Subcarrier Output

# Selectable 4.332 / 8.664 MHz Crystal Oscillator with Variable Dividers

# Synchronous Demodulator for 57kHz Modulated RDS Signals

# Clocked Comparator with Automatic Offset Compensation

# Clock Generation with Lock on Biphase Data Rate

# Biphase Symbol Decoder with Integrate and Dump Functions

# Available in 16 pins, DIP or SOP Package

3. PIN DESCRIPTION

PIN Symbol I/O Description

1 QUAL O Quality indicator output pin

2 RDDA O RDS data output pin

3 VREF I Reference voltage

4 MUX I Multiplex signal input pin

5 AVDD I Analog supply voltage

6 AVSS I Analog ground pin

7 CIN I Subcarrier input to the comparator

8 SCOUT O Reconstruction filter subcarrier output pin

9 MODE I Oscillator mode/test control input pin

10 TEST I Test pin

11 DVSS I Digital ground pin

12 DVDD I Digital supply voltage

13 OSC1 O1 Oscillator input pin

14 OSC2 O Oscillator output pin

15 T57 O 57kHz clock signal output pin

16 RDCL O RDS clock output pin

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Chapter Four

Disassembly and Assembly Process

DVD players manufactured in BBK are largely identical but with minor differences and are mainly

composed of loader components, control panel components, decode and servo board components,

power board components, power amplifier board components, MIC board components and AV board

components. In order to speed up the compilation of “Service Manual”, we shall not give repeat

explanation to model with minor differences in chapter four “Disassembly and Assembly Process” for the

later compiled service manuals. For disassembly and assembly process in this chapter, please refer to

chapter 4 of “DK1005S Service Manual” or “DK1020S Service” .

The pictures of this model are shown as follows:

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