Akai A-5181 Service Manual

DVD PLAYER

Model:

A5181

SERVICE MANUAL

www.akai.ru

Terminology & Abbreviations

Terminology & Abbreviations

AC-3 The former name of the Dolby Digital audio-coding system . AC-3 followed AC-1 and

AC-2. Still used in some standards documents.

Angle In DVD-video, a specific view of a scene, usually recorded from a certain camera

angle. Different angles can be chosen while viewing the scene.
CD Short for compact disc, an optical disc storage format developed by Philips and Sony.
CD-DA Compact disc digital audio. The original music CD format, storing audio

information as digital PCM data. Defined by the Red Book standard.
CD+G Compact disc plus graphics. A variation of CD which embeds graphical data in with

the audio data, allowing video pictures to be displayed periodically as music is

played. Primarily used for karaoke.
CD-R An extension of the CD format allowing data to be recorded once on a disc by using

dye-sublimation technology. Defined by the Orange Book standard.
Channel A part of an audio track. Typically there is one channel allocated for each

loudspeaker.
Chapter In DVD-Video, a division of a title. Technically called a part of title (PTT).
Closed Caption Text captions for video which are not normally visible, as opposed to open

captions, which are a permanent part of the picture. In the United States, the official

NTSC Closed Caption standard requires that all TVs larger than 13 inches include

circuitry to decode and display caption information stored on line 21 of the video

signal. DVD-Video can provide closed caption data, but the subpicture format is

preferred for its versatility.
Component Video A video system containing three separate color component signals, either

red/green/blue (RGB) or chroma/color difference (YGbCr, YPbPr, YUV), in analog

or digital form. The MPEG-2 encoding system used by DVD is based on

color-difference component digital video. Very few televisions have component

video inputs.
Composite Video An analog video signal in which the luma and chroma components are

combined (by frequency multiplexing), along with sync and burst. Also called CVBS.

Most televisions and VCRs have composite video connectors, which are usually

colored yellow.

CD-i Compact disc interactive. An extension of the CD format designed around a set-top
computer that connects to a TV to provide interactive home entertainment, including digital
audio and video, video games, and software applications. Defined by the Green Book
standard. CD-i Assn.

1-1

Terminology & Abbreviations

Dolby Digital A perceptual coding system for audio, developed by Dolby Laboratories and

accepted as an international standard. Dolby Digital is the most common means of

encoding audio for DVD-Video and is the mandatory audio compression system for

525/60 (NTSC) discs.
Dolby Surround The standard for matrix encoding surround-sound channels in a stereo

signal by applying a set of defined mathematical functions when combining center
and surround channels with left and right channels. The center and surround channels
can then be extracted by a decoder such as a Dolby Pro Logic circuit which applies
the inverse of the mathematical functions. A Dolby Surround decoder extracts
surround channels, while a Dolby Pro Logic decoder uses tially independent of the
recording or transmission format. Both Dolby Digital and MPEG audio compression

1-1

systems are compatible with Dolby Surround audio.

DTS Digital Theater Sound. A perceptual audio-coding system developed for theaters. A

competitor to Dolby Digital and an optional audio track format for DVD-Video.
DVCD Stands for Double Video CD -- pretty popular format in mainland China.
Format itself is nothing new really, its just a regular VideoCD overburned to include 90 to
99mins per CD, compared to regular 74mins per CD in standard VideoCD format.
DVD An acronym that officially stands for nothing, but is often expanded as Digital Video

Disc or Digital Versatile Disc. The audio/video/data storage system based on 12-and

1-1

8-cm optical discs.

DVD+R DVD+Recordable defines a standard for recordable DVD drives and media defined
by the DVDRW Alliance. Often called "plus R", the format is write once (compared to
DVD+RW wich can be erased and rewritten). The single sided discs can hold 4,700,000,000
bytes (4.38 Gigabytes at 1024 bytes to the kilobyte) with double sided discs holding twice as
much. There are no dual layer single sided recordable discs. This format competes with the
DVD Forum DVD-R specification. DVDRhelp DVDR information

JPEG Joint Photographic Experts Group. The international committee which created its

namesake standard for compressing still images.
Karaoke Literally empty orchestra. The social sensation from Japan where sufficiently

inebriated people embarrass themselves in public by singing along to a music track.

Karaoke was largely responsible for the success of laserdisc in Japan, thus supporting

it elsewhere.

Kodak Picture CD Kodak Picture CD is a CD that contains your pictures in JPEG
format(.jpg) along with software that lets you view, enhance, share, and print your pictures
from your computer. Some standalone DVD Players supports this format also, but then only
for viewing. This format will also work on DVD Players that supports "JPEG file viewing"
but you may lose some Kodak Picture CD specific features. Kodak Picture CD.

Macrovision An antitaping process that modifies a signal so that it appears unchanged on

most televisions but is distorted and unwatchable when played back from a videotape

recording. Macrovision takes advantage of characteristics of AGC circuits and burst

decoder circuits in VCRs to interfere with the recording process.

1-2

Terminology & Abbreviations

MP3 MP3 is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an
acronym for MPEG3). MP3 is a popular compression format used for audio files on
computers and portable devices.

The compression in MP3 works on the basis of a "psychoacoustic model" which means that
parts of the audio that human ears cannot detect are discarded by the encoder. Although this is
a LOSSY process, it can yield very high quality audio files are relatively high compression
rates.
A typical MP3 file encoded at 128 kbit/s (12:1 compression) is near CD quality.
MP3 audio is increasingly being used in video production coupled with various MPEG-4
video codecs like divx. The audio may be encoded with a constant or variable bitrate.
Multiangle A DVD-Video program containing multiple angles allowing different views of a

scene to selected during playback.
Multilanguage A DVD-Video program containing sound tracks and subtitle tracks for more

than one language.
RGB Video information in the form of red, green, and blue tristimulus values. The

combination of three values representing the intensity of each of the three colors can

represent the entire range of visible light.
S/N Signal-to-noise ratio. Also called SNR.

SACD Super Audio CD is the next generation of audio disc, offering full-range,
uncompressed digital multi-channel surround sound. SACD can also be backward compatible
using so called hybrid discs with an extra layer that allows them to be played on conventional
CD players but then only with ordinary CD quality. SACD can be played on SACD Players,
DVD Players with SACD support and if using hybrid discs also CD Players. SACD is
currently competing with DVD-Audio as the new audio defacto standard. Philips SACD
information.

Subtitle A textual representation of the spoken audio in a video program. Subtitles are often

used with foreign languages and do not serve the same purpose as captions for the

hearing impaired.

SVCD SVCD stands for 'Super VideoCD'. A SVCD is very similiar to a VCD, it has the
capacity to hold about 35-60 minutes on 74/80 min CDs of very good quality full-motion
MPEG-2 video along with up to 2 stereo audio tracks and also 4 selectable subtitles. A SVCD
can be played on many standalone DVD Players and of course on all computers with a
DVD-ROM or CD-ROM drive with the help of a software based decoder / player.
SVCDHelp.com.

S-video A video interface standard that carries separate luma and chroma signals, usually on

a four-pin mini-DIN connector. Also called Y/C. The quality of s-video is

significantly better than composite video since it does not require a comb filter to

separate the signals, but it’s not quite as good as component video. Most high-end

televisions have s-video inputs. S-video is often erroneously called S-VHS.
System menu The main menu of a DVD-Video disc, from which titles are selected. Also

called the title selection menu or disc menu.

1-3

Terminology & Abbreviations

Title The largest unit of a DVD-Video disc (other than the entire volume or side). Usually

a movie, TV program, music album, or so on. A disc can hold up to 99 titles, which

can be selected from the disc menu.

VCD VCD stands for 'Video Compact Disc' and basically it is a CD that contains moving
pictures and sound. If you're familiar with regular audio/music CDs, then you will know what
a VCD looks like. A VCD has the capacity to hold up to 74/80 minutes on 650MB/700MB
CDs respectively of full-motion video along with quality stereo sound. VCDs use an encoding
standard called MPEG-1 to store the video and audio. A VCD can be played on almost all
standalone DVD Players and of course on all computers with a DVD-ROM or CD-ROM
drive with the help of a software based decoder / player. VCDHelp.com.

YUV In the general sense, any form of color-difference video signal containing one luma

and two chroma components. Technically, YUV is applicable only to the process of

encoding component video into composite video.

WMF Windows Media Format files are audio/video files encoded with the Windows Media
Encoder, providing high quality and media security for streaming and download-and-play
applications on PCs, set-top boxes, and portable devices. Windows Media Format comprises
Windows Media Audio and Video codecs, an optional integrated digital rights management
(DRM) system, and a file container. Microsoft WMF Information
CVD China Video Disk - a precursor to SVCD marketed since 1998. Resolutions are
352x480 NTSC, 352x576 PAL, 44.1khz audio (unlike 1/2 D1 DVD that is the same
resolution at 48khz audio). Not all players will play CVD (compatible players). CVD Guide
DivX DivX™ is a new format for digital video, much like MP3 is a format for digital music.
DivX™ is the brand name of a patent-pending video compression technology created by
DivXNetworks, Inc., (also known as Project Mayo). The DivX™ codec is based on the
MPEG-4 compression standard. This codec is so advanced that it can reduce an MPEG-2
video (the same format used for DVD or Pay-Per-View) to ten percent of its original size.
DivX.com.
DVD+RW DVD+RW is a ReWriteable media format of the DVD+R standard.

DVD-Audio DVD-Audio or sometimes called DVD-A is a separate format from DVD-Video.

It is a format specifically designed to provide the highest possible audio fidelity capable on

1-3

DVD. DVD-Audio provides for audio in stereo and in multi-channel surround in a wide range
of specifications. In addition to audio, a DVD-Audio disk can contain a limited amount of
video, which can be used to display text, such as lyrics or notes. DVD-Audio can only be
played on DVD Players with DVD-Audio support (most DVD Players do not support this
format). DVD-Audio is currently competing with SACD as the new audio defacto standard.
DigitalAudioGuide DVD Audio FAQ

DVD-R DVD-Recordable defines a standard for recordable DVD drives and media defined
by the DVD Forum. Often called "minus R", the format is write once (compared to DVD-RW
wich can be erased and rewritten). The single sided discs can hold 4,700,000,000 bytes (4.38
Gigabytes at 1024 bytes to the kilobyte) with double sided discs holding twice as much. There
are no dual layer single sided recordable discs. This format competes with the DVD+R format.
DVDRhelp DVDR information

1-4

Terminology & Abbreviations

DVD-RAM A recordable format supported by the DVD Forum. It has superior recording
features but it is not compatible with most DVD-ROM drives or DVD Video players. It works
well when set up like a removable hard disk.
DVD-RW DVD-RW is a ReWriteable media format of the DVD-R standard.

DVD-Video DVD-Video is the video element of the DVD format. DVD Demystified

DVD-Video Features.
DVD±R A term used to cover both the DVD-R and DVD+R standards in one word.

HDCD High Definition Compatible Digital® (HDCD®) is a patented encode/decode

process for delivering the full richness and detail of the original microphone feed on Compact
Discs and DVD-Audio. HDCD has been used in the recording of more than 5,000 CD titles,
which include more than 250 Billboard Top 200 recordings and more than 175 GRAMMY®
nominations, and account for more than 300 million CDs sold.

HDCD-encoded CDs sound better because they are encoded with 20 bits of real musical
information, as compared with 16 bits for all other CDs. HDCD overcomes the limitation of
the 16-bit CD format by using a sophisticated system to encode the additional 4 bits onto the
CD while remaining completely compatible with the existing CD format. HDCD provides
more dynamic range, a more focused 3-D soundstage, and extremely natural vocal and
musical timbre. With HDCD, you get the body, depth, and emotion of the original
performance not a flat, digital imitation.

1-5

SAFETY PRECAUTIONS

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the factory, the products are strictly inspected to conform with the recognized
product safety and electrical codes of the countries in which they are to be sold. However, in order to
maintain such compliance, it is equally important to implement the following pre­cautions when a set is being serviced .

·Precautions during Servicing

1. Locations requiring special caution are denoted by labels and inscriptions on the rear panel and certain

parts of the product. When performing service, be sure to read and comply with these and other
cautionary notices appearing in the operation and service manuals .

2. Parts identified by the symbol in schematic diagram parts are critical for safety.

Replace only with specified part numbers.
Note : Parts in this category also include those specified to comply with laser emission standards for

Products using cathode ray tubes and those specified for compliance with various regulations
regarding spurious radiation.

3. Use Specified internal wiring. Note especially:

1) Double insulated wires

2)High voltage leads

4. Use specified insulating materials for hazardous live parts. Note especially:

1)Insulation Tape

2)PVC tubing

3)Spacers

4)Insulation sheets for transistor

5. Observe that wires do not contact heat producing

PARTS (heatsinks, oxide metal film resistors ,fusible resistors ,etc .)

!

6.Check that replaced wires do not contact sharp edged or pointed parts .

2-1

SAFETY PRECAUTIONS

7. 1)When a power cord has been replaced ,check that A mark is made on the cord ,under strain ,near the

aperture ,and the flexible cord is subjected 100times to a pull of 40N for a duration of 1 second each .

2)During the test ,the cord shall not be displaced by more than 2mm

8.Also check areas surrounding repaired locations .

9. The internal wiring is secured so as not to approach the heating parts and high voltage parts by its shape.
So, these wires must be restored to its former state.

10. After updated the hazardous live part or accessible part, if the clearance or creepage distance cann’t
accord with the safe request, then need adopt reinforced insulation method for ensure safety.

SAFETY CHECK AFTER SERVICING

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws ,parts

and wires have been reterned to original positions .
Afterwards ,perform the following tests and confirm the specified values in order to verify compliance wit
atfety standards .

2-2

SAFETY PRECAUTIONS

·Insulation resistance test

confirm the specified insulation resistance or greater between power cord plug prongs and externally
exposed parts of the set (RF terminals ,antenna terminals ,video and audio input and output
terminals ,microphone jacks ,earphone jacks ,etc .)See table below.

·Dielectric strength test
Confirm specified dielectric strength or greater between power cord prongs and exposed accessible parts of
the set (RF terminals ,antenna terminals ,video and audio input and output terminals ,microphone
jacks ,earphone jacks ,etc.)See table below .

·Clearance distance
When replacing primary circuit components ,confirm specified clearance distance (d),between soldered
terminals ,and between terminals and surrounding metallic parts .See table below.

Table 1: Ratings for selected areas

Insulation

AC Line Voltage Region

*110 to 240 v

110 to 230 v
*Class ll model only .
Note . This table is unofficial and for reference only . Be sure to confirm the precise values for your
particular country and locality.

USA,Australia

Europe

Resistance

F

4M/500VDC

Dielectric

Steength

4kv/minute F 6mm(d)

Clearance

Distance(d),(d)

· Leakage Current test
Confirm specified or lower leakage current between B(earth ground ,power cord plug prongs ) and
externally exposed accessible (RF terminals ,antenna terminals ,video and audio input and output
terminals ,microphone jacks ,earphone jacks ,etc .)

2-3

m

SAFETY PRECAUTIONS

Measuring Method: (Power ON)
Insert load Z between B (earth ground ,power cord plug prongs )and exposed accessible parts .Use an AC
voltmeter to measure across both terminals of load Z . See figure and following table .
Table 2: Leakage current ratings for selected areas .

AC Line Voltage

2k ohm

100 to 130 v
200 to 240 v

50k oh

Note . This table is for IEC member only . Be sure to confirm the precise values for your particular country

and locality.

Region Load Z Leakage Current(i)

<or= 0.7mA peak

Europe

Australia

<or= 2mA DC

<or=0.7mA peak

<or= 2mA DC

Earth Ground

(B) to :

Antenna earth

Terminals

Other terminals

2-4

Software Upgrade

MTK disc Upgrade Notice

1. The upgrading software must be recorded (burned) on a CD-R or CD-RW disc, and
a) Volume ID of the disc must be “MEDIATEK”, in capital letters. All Recording (burning)

software supports volume edit.

b) The upgrading software must be renamed as “MTK.BIN”, also in capital letters. You can rename

it on PC before recording.

c) The upgrading software MTK.BIN must be in root directory. Recording mode must be ISO9660

(MODE1, LEVEL1), DO NOT SELECT JOLIET, LOOSEN ISOSTRICT.

2. Load the disc

3. DVD will read disc, and prompt upgrading. Press “PLAY” on remote to confirm upgrading.

Note: Do not turn off the player while under upgrading; do not let electricity cut off. Otherwise the player
will halt and never be operate again.
If the DVD player cannot read the disc, please record some data file (trash files that the player cannot
support) before recording upgrading software.

3-1

A

A

A

0

Electrical Performance Standards

No. Test item Requirement

1

2 Audio amplitude/frequency response (dB)

3

4

5

6 Cross-Sound base wave (dB) ≥80

7 1KHz Channel Balance (dB)

8 Intermodulation Distortion (dB)

9 Frequency error (dB) ±0.02

10

11

12

13

14 Output Intensity (iput 1KHz 20mVp-p)

15 Distortion and Noise (%)

16 Frequency Response (dB)

nalog output level(V) (Virtual value) 1.0~2.0v

20Hz ±1
125Hz ±1
1KHz ±1
10KHz ±1
18KHz ±1
20KHz ±1

udio SNR (dB) (A) ≥90

udio distortion and noise (dB) (1KHz) ≤-65

Dynamic Range (dB) (1KHz)

0

AUDIO FEATURE

Level non-linear (dB)

Digital out level (V) (Vp-p)

De-bass function (dB)

disc 784

DTS Test DOLBY Test

MIC

-10

-20

-40

-60

 12   12  -4.53±1

 13   13  -9.04±1

DTS

DOLBY

FL

FR

C

SL

SR

SW

120Hz ±3

5KHz ±3

dB 1KHz

output Level

Reference Level

≥80

≤1

≤-50

±1

0.5±0.05

Amplitude Response
under 0dB output

level (dB)

(20Hz-20KHz)

Reference Level

Amplitude Response

+0.5/-1.0(dB)

(20Hz-20KHz)

2.5±0.5V

≤0.5

17

18

19

20

Frequency error (dB)

Short Read Time (Sec)

other

Long Read Time (Sec)

Max Power Consumption (W)

≥45

≤5

≤10

15

4-1

Electrical Performance Standards

No.

21

22

23

24

25
26
27
28

29

30
31

32

33

34

35

36

37

38

39

40

VIDEO FEATURE

Test item Requirement

Video Output Level

Vp-p(V)

Horizontal Definition (TV)

S video output

CVBS

FEAT

URE

Y, U , V
FEAT

URE

Luminance channel bandwidth

and Amplitude Response

(MHz)

Chroma channel bandwidth

and amplitude response (MHz)

Luminance non-linear distortion (%) ≤5

Luminance Wave distortion (%) ≤10
Luminance SNR (dB) ≥50
Chroma SNR (dB) AM≥60 PM≥50
Luminance/Chroma signal delay (ns) ≤100
Differential plus DG (%) ≤5
Differential Phase DP (°) ≤5

S-video signal amplitude Vp-p

load (mV)

S-video signal bandwidth and

amplitude response (MHz)

S-video signal SNR (Db)

YUV output signal amplitude

Vp-p load(mV)

YUV output signal bandwidth

and amplitude response (MHz)

YUV output signal SNR

(Db)

RGB output signal amplitude

Vp-p load(mV)

RGB output signal bandwidth
and amplitude response (MHz)

RGBoutput signal SNR

(Db)

CVBS output

Line Sync amplitude

VCD

AV output

VCD

SVCD

DVD

VCD

SVCD

DVD

Y channel 700±140

C channel

Y channel

C channel

Y channel

C channel

Y channel

U channel

V channel

Y channel

U channel

V channel

Y channel

U channel

V channel

R channel

G channel

B channel

R channel

G channel

B channel

R channel

G channel

B channel

Y channel

SVCD

DVD

VCD

SVCD

DVD

Chorma
Chroma

Sync

≥3.5-20dB

≥3.5-20dB

≥3.5-23dB
≥3.5-24dB

≥50

≥50

1.0±0.2

0.3±0.05

≥250

≥350

≥450

≥250

≥350

≥500

≥5.5-6dB

≥1.5-6dB

880±176

300±60

≥5.5-6dB

≥1.5-6dB

≥50

≥50

700±140

700±140

700±140

≥5.5-6dB

≥2-6dB

≥2-6dB

≥50

700±140

700±140

700±140

≥5.5-6dB

≥5.5-6dB

≥5.5-6dB

≥50

≥50

≥50

4-2

Package (Inbox)and Block Diagrams

1

2

6

7

3

4

5

8

9

10

1. AV Cable 6. Owner’s Manual bag

2. Batteries 7. Owner’s Manual

3. Remote control 8. EPS

4. scart Cable 9. Power cord

5. Scart cable box 10. Color box

5-1

DVD Box Block Diagram

6-1

General Classification of Symptoms

Common phenomenon classification

1.

Check Power line connect to
POWER?Check switch ?

Check signal wire connect to
decoder board correct?

2.

Check audio wire between
DVD player and TV

Check Scart wire
connection to TV

DVD audio setup correct?

To decoder board service D2\D3-1\D3-3

VFD no display

Y

Y

KB board OK?

N

To KB board service K1

TV no voice

Y

Y

Y

Y

N

Connect again. Normal?

N

Connect again, Normal?

T o decoder board service D1

N

N

N

Connect DVD left/right
channel to TV correctly

Connect again

Setup audio by referring to manual

7-1

General Classification of Symptoms

3.

4.

Video wire connection correct? Connect to TV correctly

SCART wire connection correct?

Press “v.mode” key of the
REMOTE..

To decoder board service D3\D3-2\D3-3

Check Loader signal wire
connects to board correct?

Check flat ribbon connect to
decoder/servo board

TV no display

Y

Y

Y

Cannot open tray

Loader too low/high? Adjust loader

N

Y N

Y



N

N

N

Y

Connect again, TV display
normal?

N

Press times, normal?

N

N

Connect again, normal?

Connect again, normal?

N

7-2

General Classification of Symptoms

5.

Check Loader wire connect to
decoder board correct

Check flat ribbon connect to
decoder board correct

Press “Open/Close” on front panel, the
data line of KB board has wave out?

Press “Open/Close” on remote control,
the IR line of KB board has wave out?

Do not read disc

Disc scratched/dirty? Replace disc

N

Y

Y

To decoder board service



Y

Y

To board service

Y

N

Connect again, normal?

N

N

Connect again, normal?

N

N

To KB board service K3

N

To KB board service K2

7-3

General Classification of Symptoms

6.

7.

8.

Check optical/coaxial connection to

decoder device OK?

Image/voice distortion

Disc scratched/dirty? Replace

N

T o decoder board service D4, D5

Optical/Coaxial output abnormal

Audio setup correct? Adjust according to

Y

Y

T o decoder board service D6

Read disc and halt

Disc scratched/dirty? Replace/clean disc

N

To servo board service

Y

N

manual instruction

N

Adjust according to
manual instruction

Y

7-4

General Classification of Symptoms

9.

10.

11.

12.

Reading drag To servo board service

control

MIC no voice To MIC service M1

To KB board service K3 Cannot operate by remote

To MIC service M2 MIC self activated

Judgment standard for loader damage

When below phenomenon exist, the loader may be damaged.

1. no spin

2. no laser

3. cannot open/close tray normally

4. main axis turning, but no pickup focus or gliding

5. cannot read discs

When above phenomenon exists, please try replacing loader to solve the
problem.

7-5

8-1 Power Board Block Diagram

8-1

8-1 Power Board Block Diagram

A

REV:

2005/09/06

Viper22+EE25

AKAI A-5181

DATE:

Title:

-12V

100UF/25V

E206

10UH

L201

E205

100UF/25V

D201

FR154

T101

103/1KV

C101

R101

D103

22U/400V

1N4007

D105

56K/2W

E101

D104

1N4007

+12V

E204

220UF/16V

10UH

L202

E203

220UF/16V

FR154

D202

FR107

磁珠

L102

65

IC101

5V

E202

1000UF/10V

10UH/2A

L203

E201

1000UF/10V

D204

IN5822

3

4

8

1

7

2

DH321 DIP

470/1/4W

R103

D106 FR104

R102

10R/1/4W

R201

4.7K/1/4W

R203

R203

C103

104/50V

2.2K/1/4W

C202

1K/1/4W

1

2

IC102

3

4

R202

4.7K/1/4w

104/50V

1

2 3

IC201

TL431

PC817

2200pF-250V

CY103

4.3V

ZD1

D101

1N4007

NF1

12mH

F101

T1AL 250V

1

2

CN101

D102

1N4007

L101

CX101

0.1uF-275V

1

2

8MM-2P

8MM -2P

CN102

E102

47UF/50V

8-2

8

Main point waveforms and schematic diagrams of electronic components
8-1 Reference waveform of key test point of power board

TP1+12V (no disc) 3-mVpp TP1 (reading disc) 250mVpp

TP2+5V (no disc) 3-mVpp TP2+5V (reading disc) 40mVpp

TP3 (idle) 20Vpp TP3 (no disc)20Vpp

TP3 (reading disc)20Vpp

8-3

8

Repair of Power Board

I. Power switch working principles

TinySwitch-II(TNY267) maintains the simplicity of the TinySwitchtopology, while
providing a number of new enhancements tofurther reduce system cost and component count,
and topractically eliminate audible noise. Like TinySwitch, a 700 Vpower MOSFET,
oscillator, high voltage switched current source,current limit and thermal shutdown circuitry
are integrated onto amonolithic device. The start-up and operating power are derived directly
from the voltage on the DRAIN pin, eliminating the need for a bias winding and associated
circuitry. In addition, the TinySwitch-II devices incorporate auto-restart, line undervoltage
sense, and frequency jittering. An innovative design minimizes audio frequency components
in the simple ON/OFF control scheme to practically eliminate audible noise with standard
taped/varnished transformer construction. The fully integrated auto-restart circuit safely lim its
output power during fault conditions such as output short circuit or open loop, reducing
component count and secondary feedback circuitry cost. An optional line sense resistor
externally programs a line under-voltage threshold, which eliminates power down glitches
caused by the slow discharge of input storage capacitors present in applications such as
standby supplies. The operating frequency of 132 kHz is jittered to significantly reduce both
the quasi-peak and average EMI, minimizing filtering cost.

1. Conversion from a.c. to d.c. circuit

220V a.c. current flows restrictively through F1 fuse, and through D301~D304 to

combine as bridge rectification. After C1L2C2 undergoes electrolytic filter, we can
obtain a 320V d.c. voltage (Uhv).

2. Process to start up the software

The TinySwitch-II does not require a bias winding to providepower to the chip, because

it draws the power directly from the DRAIN pin (see Functional Description above). This has
twomain benefits. First, for a nominal application, this eliminatesthe cost of a bias winding
and associated components.Secondly, for battery charger applications, the current-voltage
characteristic often allows the output voltage to fall close tozero volts while still delivering
power. This type of application normally requires a forward-bias winding which has many
more associated components. With TinySwitch-II, neither are necessary. For applications that
require a very low no-load power consumption (50 mW), a resistor from a bias winding to the
BYPASS pin can provide the power to the chip. The minimum recommended current supplied
is 750 µA. The BYPASS pin in this case will be clamped at 6.3 V. This method will eliminate
the power draw from the DRAIN pin, thereby reducing the no-load power consumption and
improving fullload efficiency. And check c5,it is very importance of starp up.

3. Bias winding

After starting the power, T P1~P2 bias winding supplies bias current and error current to
the internal of IC2 , through D7 and C4 rectifier filter and through R2 light-electric coupler.Check
IC2 BP pin (IC2 PIN1),it’s voltage is 6.3v.

8

8-4

4. Regulation process of output voltage

When the input current of control pin (5) IC2 decreases (or increases), oscillation
waveform will be regulated automatically so that T ratio will increase (or decrease) and
the output voltage will increase (or decrease).

Output voltage feedback circuit is completed by Z1R8D13

5IC2 TNY267 introduction

8

8-5

1No voltage output

Measure each output terminal to see
whether it is short circuit

NO

Measure the voltage ofC1L2C2

About 320V

YES

Far less than 320V

Eliminate short-circuit point

Check a.c. and d.c. conversion
elements such as FUSE, power
switch, D1D2D3D4 etc.

Measure the voltage of 5pin (VCC)
of IC2

About 320V

Measure whether the voltage of 1
pin IC (VFF) is equal to 2.8V

NO

0V

YES

Open circuit of 1~3 pins of T

PIC 817Z1 are damaged

Measure whether the voltage of 5
pin IC2 (5) is equal to 6.3V

NO

YES

Check whether C5R2D7C4R4
C6 are damaged

Test whether the windings of T are
short circuit, open circuit

NO

YES

Replace T

Measure other elements

8

8-6

1. 2Unstable voltage output, decrease of carrier capability

Take out the output cord, connect
false loading

Abnormal

Normal output voltage

Measure the working temperature of
elements by infrared thermometer

Normal

Abnormal

Is the voltage of light-emitting tubes in
optical coupling at about 1V?

Yes

No

Is the reference voltage of R8 at

2.5V?
Yes No

No

Is the voltage of IC2 control pin
normal?

Yes

No

`

Is the voltage of C2at 320V?

No

+5V+12V-12V-24V is lower

Yes

Yes

Check other compents

No

Other power boards overloaded

Analyse heating elements

Replace optical coupling

Is it normal after replacing Z1?

Check D7R2

There is damage in D1D2D3D4,
forming half-wave rectification

Check D13R8Z1D12

8-7

5

4

3

2

1

COMMON89D_KHM310_V5

MT1389D (LQFP216) DVD Demo Board for KHM310

1 INDEX & POWER, RESET

2 RF, SERVO & MPEG - MT1389E

D D

3 MEMORY - SDRAM, FLASH/EEPROM
4 VIDEO OUT

5 AUDIO DAC WMA8766

NAME
VCC
DV33
RFV33
LDO_AV33 Laser Diode 3.3V
AVCC
V18

SD33

+12V

-12V

+P5V

+P5V

AVDD
DVDD

VCC

VCC

L12

FB

C C

B B

A A

L7

FB

L9

FB

L5

FB

CB6

0.1uF

CB9

0.1uF

TYPE
Digital 5V
Digital 3.3V
Servo 3.3V

RF 5V
Digital 1.8V

Digital 3.3V

Audio +12V
Audio -12V
Audio 5V
Audio 3V3

CE3

CB4

+

220uF/16V

0.1uF

VCC_AUDIO

+

CE5
220uF/16V

AVCC

VCC

+

CE9
220uF/16V

+P5V
+P5V
+P12V

-P12V

A_MUTE

DEVICE

SUPPLY

MT1389E

MT1389E

PICKUP HEADER
MT1389E

SDRAM

OP AMP.
OP AMP.
Audio DAC
Audio DAC

+P5V

D20

1 2

1N4148

+P12V-P12V

V33

V33

6x1 W/HOUSING

L6

FB

L10

FB

L11

FB

J9

1
2
3
4
5
6
7
8

RFV33

LDO_AV33

CB5

0.1uF

+12V-12V

+

CE4
220uF/16V

CB7

0.1uF

CB8

0.1uF

+

+

CE7
220uF/16V

LDO_AV33

CE8
220uF/16V

RFV33

V33

V33

L2
FB

VCC

L4

NO_USER

Regulator

Fix regulator

Adj regulator

CB1

RT9164CG/AZ1117H-A DJ

U1

3

IN

GND

1

2

OUT

R1

300 1%

R2

680 1%

0.1uF

C1

+

CB2

0.1uF

CE2
220uF/16V

C

Power ON alive source

R1 R2

0 ohm

OFF

300 1% 680 1%

U2

RT9164 33/AZ1117 33

VCC V33

3

2

VI

VO

4

VO

GND

1

+

CE1
220uF/16V

L1

FB

L3

FB

DV33

DV33

V18

V18

CB3

0.1uF

A_MUTE

URST#
V18
DV33

VCC
AVCC

VCC_AUDIO

+12V

-12V
GND

DV33

A_MUTE [5]

URST# [ 2 ]
V18 [ 2 ]
DV33 [ 2,3,4,5 ]

VCC [ 2,3,4,5 ]
AVCC [ 2 ]

VCC_AUDIO [ 5 ]

+12V [ 4,5 ]

-12V [ 4,5 ]
GND [ 2,3,4,5 ]

D1

1N4148

R3
10k

CE6

+

10uF/16V

URST#

TP1
URST#

MediaTek Incorporation

Title

COMMON89D_KHM310_V5

Size Doc um e n t N u mb er Re v

C

5

4

3

2

Date: Sheet

INDEX

1

15Thursday, June 24, 2004

4

of

5

L14

RFV33

R11

C14

680k

2200pF

R32 10k

R33 10k

R34 100k

AVCC

FB

+

Very Important to
reduce Noise

L20
10uH

Q4

2SB1132

1

3 2

R40 4.7

R41 4.7

Q5

32

2SB1132

1

VOTK+
VOTK­VOLD+
VOLD­PGND
VNFTK
PVCC2

G2
PREGND

VINLD
CTK2
CTK1
VINTK
BIAS
STBY

RFV33

ADIN
OP-

OP+

V1P4

AVCC

CE17
100uF/16v

1

R173

TP51

VOFC+

VOFC-

VOSL+

VOSL-

PGND

PVCC1

VCC

VNFFC

VOSL
VINSL­VINSL+

CF2
CF1

VINFC

B

G1

CB13

0.1uF

TP12
TP13
TP14
TP15
TP16

IOA

2

C

C

E

2SB1132

10K

+

+

F­F+

14
13
12
11
10
9
8

29
7

6
5
4
3
2
1

TP4
TP5

TP6

V2P8

+

3

CE18
47uF/16v

CE19
47uF/16v

LOAD+
LOAD-

L17

330uH

+

CE46
1000uF/16v

CE13
47uF/16v

C
B
A
D

RFO

C
B
A
D

RFVDD3

C37

C

CD

FB

ADACVDD3

CB14

0.1uF

C29 1uF

C31 1uF

C32 1uF

C34 C

TP18
TP19
TP20
TP21
TP22
TP23
TP24
TP25
TP26
TP27
TP28
TP29

TP37

R37

R

V18

R174

LDO2

LDO_AV33

LDO1

R45
1

SP­SP+

TRCLOSE
TROPEN

FOSO

+

CE21
47uF/16v

CB17

0.1uF

100K

C19
6800PF

V20

+

CE14
47uF/16v

C30 1uF

R38

V18

C3 2200pF

R6 680k

R9
150k

SP­SP+
LIMIT

SL­SL+

DV33

R23 10k

V18

D

3

G

2

1

2SK3018

HA1

24
23
22
21
20
19
18
17
16
15
14
13

TOP

12
11
10
9
8
7
6
5
4
3
2
1

R43
1

TP52
TP54

MO_VCC

R15 R
R19 1

V18

S

LD-DVD

LD-CD

SL+
SL-

CB33

0.1uF

L18
FB

GND

AVCC1
MDI1

E
AVCC1
V20
GND

F

B

A

RFO

IOA

D

C

R44
1

R31 100k

2

Q2

R35

100

R59
10k

D D

C C

B B

HEADER 24 SMD0.5 TOP

A A

TP38

TP39

FMSO

TRSO
V1P4
STBY

OPO

CB16

0.1uF

13

R36

100

T-

R10
150k

1
2
3
4
5
6

6x1 W/HOUSING

RFV18

3

C

1

B

E

2N3904

2 3

13

2

Q3

CB18

0.1uF

L21

10uH

CB35

0.1uF

5

C4

0.1uF/N.C
R7 0

J1

2

1

Q1

L19
C38

0.1uF

TP50

U5

15
16
17
18
19
20
21

30
22

23
24
25
26
27
28

AM5668

R13

6.8

ADACVDD3

C33 1uF

SUBA
SUBB
SUBC
SUBD

E
F
MDI1
MDI2
LDO2
LDO1

TP32
TP33
TP34

C36

0.1uF

R

STBY

R46
1

TP53
TP55

MO_VCC

R54
20k

CB15

0.1uF

TP17

TP30
TP31

TP35
TP36

4

C5

0.1uF

+

CE12
100uF/16v

V1P4

+

CE15
47uF/16v

RFOP
RFON

V2P8
V20
V1P4

TEZISLV
OPO
OP­OP+
DMO
FMO
TROPEN

TRO
FOO
ADIN
II_SDA
II_SCL

R39 0

A2
A3

A4
A5
A6

A8

A18
A19

DV33

FOSO
TRSO
FMSO
DMSO

DMSO

4

FEO
TEO

C6

0.01uF

C39

330pF

PLLVDD3

CB12

0.1uF

C40

330pF

RFVDD3

C7

2200pF

1

AGND

2

DVDA

3

DVDB

4

DVDC

5

DVDD

6

DVDRFIP

7

DVDRFIN

8

MA

9

MB

10

MC

11

MD

12

SA

13

SB

14

SC

15

SD

16

CDFON

17

CDFOP

18

TNI

19

TPI

20

MDI1

21

MDI2

22

LDO2

23

LDO1

24

SVDD3

25

CSO/RFOP

26

RFLVL/RFON

27

SGND

28

V2REFO

29

V20

30

VREFO

31

FEO

32

TEO

33

TEZISLV

34

OP_OUT

35

OP_INN

36

OP_INP

37

DMO

38

FMO

39

TROPENPWM

40

PWMOUT1/ADIN0

41

TRO

42

FOO

43

FG/ADIN1

44

GPIO0

45

GPIO1

46

GPIO2

47

IOA2

48

DVDD18

49

IOA3

50

IOA4

51

IOA5

52

IOA6

53

IOA7

54

HIGHA0

C41

0.1uF

VCC

C24

0.1uF

C42

L22

FB

R12 15k

C17 0 .1uF

RFVDD3

C20 0 .1uF

214

213

211

216

215

212

OSP

OSN

IREF

RFGC

AVDD3

IOA18

IOA19

DVSS

58

55

57

56

A16

PWR#

R47 20k
R48 18k
R49 15k
R50 10k

0.015uF

V1P4

MO_VCC

3

C12
1500pF

Y6

Y5

APLLVDD3

181

182

183

B

R

APLLVDD3

URD#

A0

RGB_SWITCH

UWR#

TP40

TP49

J4

1
2
3
4
5

5x1 W/HOUSING

JITFN

TP3

DACVDD3

CB11

0.1uF

TP9

TP8

ASDAT0

ASDAT1

ASDAT2

ASPDIF

ALRCK

174

CVBS

UP1_696DVSS

97

DACVSSC

SDA

173

172

FS

UP1_798UP3_099UP3_1

RESET#

TP47

DACVDD3

171

VREF

100

MUTE_DAC

TP43

FS0

169

164

167

166

165

163

168

170

SPDIF

ALRCK

DVDD3

ASDATA0

ASDATA3

ASDATA2

ASDATA1

MC_DATA

DACVDDC

UP3_4

101

102

RXD

TXD

ACLK
ABCK

DVSS
GPIO5
GPIO4
GPIO3

DVDD18

DVDD3

RA11

RCLK

DVSS

DVSS

RA10

DVDD3

RCS#

RAS#

DVDD18

CAS#
RWE#

DVSS
DQM1

RD10
RD11
RD12

DVDD3

RD13
RD14

DVSS

RD15

DVSS

DQM0

IR

UP3_5

GPIO7

ICE

PRST#

INT0#

DVDD3

U4

106

103

104

105

107

108

MT1389D

IR

INT0#

URST#

ICE

TRCLOSE

TP44

TP48

Y4

Y3

DACVDD3

DACVDD3

179

180

177

178

176

175

G

DACVSSA

DACVSSB

DACVDDA

DACVDDB

95

SCL

IOA

VSTB

VSDA

VSCK

R42

TP42

10k

DV33

JITFO

C2 39 0pF

TP2

10uF/10v

RFV18

192

XTALO

RFVDD18

C11

191

RFGND18

AL

190

189

ADACGND

AR

ADACVDD3

186

188

187

AL

AR

VCM

R5 750k

184

185

APLLVSS

APLLCAP

ADACVDD3

V1P4

C8 0.1uF

20pF

C9

R8 100k

1000pF

C16

RFVDD3

0.1uF

RFVDD3

C21 0. 03 3uF

C25

204

208

207

205

210

206

209

HRFZC

RFGND

CRTPLP

RFVDD3

ADCVSS

RFRPAC

RFRPDC

10uF/25v
C10

+

XI

XO

C13 0.47uF/N.C

C22 0.047uF

203

LPFOP

ADCVDD3

R17 0

C23 0.047uF

PLLVDD3

JITFO

JITFN

XTALI

201

194

195

202

198

193

200

199

196

197

JITFN

LPFIP

XTALI

JITFO

LPFIN

LPFON

PLLVSS

PLLVDD3

IDACEXLP

MT1389D

V1.7

HIGHA465HIGHA564HIGHA762DVDD361A1660IOWR#59DVDD3

HIGHA6

IOCS#

HIGHA366HIGHA1

IOA20

HIGHA2

A12

A13

DV33

68

69

67

A9

A20

A11

A10

FOO
TRO
FMO
DMO

R51 10k
R55 10k

71

70

A1

PRD#

PCE#

63

A14

A15

DVSS74IOOE#73IOA172DVSS

AD0

AD378AD4

76

75

79

AD2

AD4

AD1

AD3

AD0A7AD6

C45

0.1uF

3

AD681AD277AD1

ALE

IOA21

AD5

DVDD1884AD785A1786DVDD387IOA088UWR#89URD#90UP1_291UP1_392GPIO693UP1_494UP1_5

83

82

80

AD7

AD5

A21

ALE

A17

V18

TP41

TP45

LOAD­LOAD+
TROUT

TRIN

TP46

2

DV33

L15

FB

+

CE11
10uF/25v

DV33

FS
VREF

TP11

R24

4.7k

V18

162
161
160
159
158
157
156
155

RA4

154

RA5

153

RA6

152

RA7

151
150

RA8

149

RA9

148
147

CKE

146
145
144

RA3

143
142

RA2

141

RA1

140

RA0

139
138
137

BA1

136

BA0

135
134
133
132
131
130
129
128

RD8

127

RD9

126
125
124
123
122
121
120
119
118

RD0

117

RD1

116

RD2

115
114

RD3

113

RD4

112

RD5

111

RD6

110

RD7

109

DV33

1

RxD

2

TxD

3
4

4x1 W/HOUSING

ACLK
ABCK

MA4
MA5
MA6
MA7

MA8
MA9
MA11
DCKE
DCLK

MA3
MA2

MA1
MA0
MA10

BA1
BA0
CS#
RAS#

CAS#
WE#

DQM1
DQ8
DQ9
DQ10
DQ11
DQ12

DQ13
DQ14

DQ15
DQ0
DQ1
DQ2

DQ3
DQ4
DQ5
DQ6
DQ7
DQM0

J3

C28

0.1uF

C15
1000pF

L16 2.7u, DIP

XI

TP10

R22

2K

R25 0
R26 0
R27 0

CB24

0.1uF

ALRCK

R20

CB19

0.1uF

CB25

0.1uF

NC

TROUT
TRIN
LIMIT

C26
27pF

R29
1k

CB20

0.1uF

CB26

0.1uF

CB30

0.1uF

IR

147

U3A

1 2

74HC04

R16 100k

Y1 C27MHz

1 2

C35
100pF

CB21

CB22

0.1uF

0.1uF

CB28

CB27

0.1uF

0.1uF

CB31

0.1uF

R30 10

V18

DV33

DV33

DV33

CB23

0.1uF

CB29

0.1uF

CB32

0.1uF

C27
27pF

1

APLLVDD3

147

3 4

R21

NC

MUTE_DAC
MUTE_DACV1P4

URST#

A[0..21]

AD[0..7]

PRD#
PWR#
PCE#

MA[0..11]
DQ[0..15]
BA[0..1]

DQM[0..1]
DCLK

DCKE
CAS#
RAS#
WE#
CS#

ASDAT[0..2]

AL
AR

CB10

0.1uF

U3B

74HC04

XO

CE16

100uF/16V

CD

VSDA

II_SDA

VSCK

VSTB

II_SCL

RESET#

RGB_SWITCH

AVCC
PCE#
PWR#

Y[3..6]

FS0

VIDEO INTERFACE

FLASH

MEMORY

SCL
SDA

VSCK
VSDA

ALRCK
ACLK
ABCK
ASPDIF

AUDIO INTERFACE

R4
0

+

CE10
10uF/25v

R14 0

VCC

R28

10

+

R167

R168

R170

4.7K

4.7K

RESET# [5]
RGB_SWITCH [5]

AVC C [1 ]

PCE# [3]
PWR# [3]

MUTE_DAC [5]
MUTE_DAC [5]

URST# [1]

Y[3..6] [ 5 ]
FS0 [4]

A[0..21] [3]

AD[0..7] [3]

PRD # [3]
PWR# [3]
PCE# [3]

MA[0..11] [3]

DQ[0..15] [3]

BA[0..1] [3]
DQM[0..1] [3]

DCLK [3]
DCKE [3]

CAS# [3]
RAS# [3]
WE# [3]
CS# [3]

SCL [3]
SDA [3]

IIC

ASDAT[0..2] [5]

AL [5]
AR [5]

VSCK
VSDA

ALRCK [5]
ACLK [5]
ABCK [5]
ASPDIF [4]

L13
FB

XTALI

C18
C

J2

1
2
3
4
5
6
7
8

6x1 W/HOUSING

4.7K

DV33

RS-232

MediaTek Incorporation

Title

COMMON89D_KHM310_V5

Size Doc um e n t N u mb er Re v

C

2

Date: Sheet

RF&MEPG

1

25Thursday, June 24, 2004

4

of

5

U7

MA0

21

MA1
MA3

MA4
MA5
MA6
MA7

MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
MA10
MA11
DBA0
DBA1

SDCLK
SDCKE

DCS#
DRAS#
DCAS#
DWE#

DQM0
DQM1

MA8
MA9
MA10
DBA0

SDCLK
SDCKE

DCS#
DRAS#
DCAS#
DWE#

DQM0
DQM1

D D

C C

B B

A A

A0

22

A1

23

A2

24

A3

27

A4

28

A5

29

A6

30

A7

31

A8

32

A9

20

A10

19

BA/A11

35

CLK

34

CKE

18

CS

17

RAS

16

CAS

15

WE

14

DQML

36

DQMH

33

NC

37

NC

26

VSS

50

VSS

ESMT M12L16161A-7

TSOP50

U9

23

A0

24

A1

25

A2

26

A3

29

A4

30

A5

31

A6

32

A7

33

A8

34

A9

22

A10/AP

35

A11

20

BA0/A13

21

BA1/A12

38

CLK

37

CKE

19

CS

18

RAS

17

CAS

16

WE

15

DQML

39

DQMH

36

NC

40

NC

54

VSS

41

VSS

28

VSS

ESMT M12L64164A/N.C

TSOP54

5

DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8

DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15

VCC

VCC

VCCQ
VCCQ
VCCQ
VCCQ

VSSQ
VSSQ
VSSQ
VSSQ

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

DQ8

DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15

VCC

VCC

VCC

VCCQ
VCCQ
VCCQ
VCCQ

VSSQ
VSSQ
VSSQ
VSSQ

DQ7

2

DQ6

3

DQ5MA2

5

DQ4

6

DQ3

8

DQ2

9

DQ1

11

DQ0

12

DQ8

39

DQ9

40

DQ10

42

DQ11

43

DQ12

45

DQ13

46

DQ14

48

DQ15

49

SD33

1
25

SD33

7
13
38
44

4
10
41
47

DQ7

2

DQ6

4

DQ5

5

DQ4

7

DQ3

8

DQ2

10

DQ1

11

DQ0

13

DQ8

42

DQ9

44

DQ10

45

DQ11

47

DQ12

48

DQ13

50

DQ14

51

DQ15

53

SD33

1
14
27

SD33
3
9

43
49

6
12
46
52

FLASH_VCC

R70

10k

R0603

FLASH_VCC

4

MA0
MA1
MA2 DQ2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
MA10
DBA0

SDCKE
DBA1

DRAS#
DCAS#
DWE#

DQM0
DQM1

A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
AA20
AA21

PCE#
PRD#
PWR#

TSOP48

U8

21

A0

22

A1

23

A2

24

A3

27

A4

28

A5

29

A6

30

A7

31

A8

32

A9

20

A10

19

BA/A11

35

CLK

34

CKE

18

CS

17

RAS

16

CAS

15

WE

14

DQML

36

DQMH

33

NC

37

NC

26

VSS

50

VSS

ESMT M12L16161A-7

TSOP50

A20 AA20

25
24
23
22
21
20
19
18

48
17
16

10
26

28
11

12

16Mb

R61 R
R62 R

32Mb

U11

A0
A1
A2
A3
A4
A5
A6
A7

8

A8

7

A9

6

A10

5

A11

4

A12

3

A13

2

A14

1

A15
A16

WP/ACC

A17
A18

9

A19
A20

CE
OE
WE

RESET

STM29W160/MX29LV800(160)

TSOP 48 pin

8M 16M 32M FLASH

4

D10
D11
D12
D13
D14
D15

BYTE

VCC

GND1
GND2

R0603
R0603

D0
D1
D2
D3
D4
D5
D6
D7
D8
D9

2

DQ0

3

DQ1

5

DQ2

6

DQ3

8

DQ4

9

DQ5

11

DQ6

12

DQ7

39

DQ8

40

DQ9

42

DQ10

43

DQ11

45

DQ12

46

DQ13

48

DQ14

49

DQ15

1

VCC

25

VCC

7

VCCQ

13

VCCQ

38

VCCQ

44

VCCQ

4

VSSQ

10

VSSQ

41

VSSQ

47

VSSQ

AA21A21

29
31
33
35
38
40
42
44
30
32
34
36
39
41
43
45

R67 10k

14
47
37
27

46

AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7

A0

DQ0
DQ1

DQ3
DQ4
DQ5
DQ6
DQ7
DQ8

DQ9
DQ10
DQ11
DQ12
DQ13SDCLK
DQ14
DQ15

SD33

SD33

CB53

0.1uF

C0603

R0603

FLASH_VCC

CB54

0.1uF

C0603

3

CB38

CB37

FB3MM

NO_USE

NC

FB3MM

RESET

Vcc

IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
IO8

IO9
IO10
IO11
IO12
IO13
IO14
IO15

BYTE

GND
GND

CB50

0.1uF

C0603

CB36

CB44

0.1uF

C0603

SD33

CB51

0.1uF

C0603

0.1uF

C0603

23

15
17
19
21
24
26
28
30
16
18
20
22
25
27
29
31

44
33

13
32

0.1uF

C0603

CB49

0.1uF

C0603

SD33

CE24

+

47uF/16V

DC10A

FLASH_VCC

CE25

+

47uF/16V

DC10A

FLASH_VCC

AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7

A0

FLASH_VCC

0.1uF

C0603

CB45

0.1uF

C0603

CE22

+

220uF/16V

DC100A

CE23

+

220uF/16V

DC100A

DV33

L23 FB

VCC

L24

DV33

L25 FB

TS48

11
10

9
8
7
6
5

4
42
41
40
39
38
37
36
35
34

3

2

43
14
12

U10

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18

WE
OE
CE

AT49F8192A, SOP

8M Flash

A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19

PWR#
PRD#
PCE#

3

2

SD33

CB39

CB40

0.1uF

0.1uF

C0603

C0603

SD33

CB46

CB47

0.1uF

0.1uF

C0603

C0603

DCS#
DRAS#
DCAS#
DWE# WE#

DBA0
DBA1
SDCKE
SDCLK

2

CB42

CB41

0.1uF

0.1uF

C0603

C0603

CB48

0.1uF

C0603

RN1

1 2
3 4
5 6
7 8

R63 33
R64 33
R65 33
R66 33

Title

Size Document Number Rev

Date: Sheet

CB43

0.1uF

C0603

[ 2 ]
[ 2 ]

[ 2 ]
[ 2 ]
[ 2 ]
[ 2 ]

CS#

33x4

RN-8

R0603
R0603
R0603
R0603

RAS#
CAS#

BA0
BA1
DCKE
DCLK

DV33

CB52

0.1uF

C0603

[ 2 ]

GND

DV33

VCC

U12

1

NC

2

NC

3

NC
GND4SDA

EEPROM 24C16

SOP8

MediaTek Incorporation

COMMON89D_KHM310_V5

B

SDRAM&FLASH

DQ[0..15][ 2 ]

MA[0..11][ 2 ]
BA[0..1]
DQM[0..1][ 2 ]

DCLK
DCKE
CAS#
RAS#
WE#
CS#[ 2 ]

PCE#
PRD#[ 2 ]
PWR#[ 2 ]

A[0..21][ 2 ]
AD[0..7][ 2 ]

SCL[ 2 ]
SDA[ 2 ]

VCC
SCL

1

WP

1

DQ[0..15]

MA[0..11]
BA[0..1]
DQM[0..1]
DCLK
DCKE
CAS#
RAS#
WE#
CS#

DRAM

PCE#
PRD#
PWR#

A[0..21]

AD[0..7]

FLASH

SCL
SDA

IIC

GND [ 1,2,3,4,5 ]

DV33

[ 1 ]

VCC

[ 1 ]

R68
680

R0603

8
7
6
5

of

35Thursday, June 24, 2004

R69
680

R0603

DV33

SCL
SDA

4

5

R172
75,1%

NC

D D

Y3

R73

C C

3906

C

B

B B

A A

39,1%

E

Y3

R78
150,1%

Y4

R81
150,1%

Y5

R91
150,1%

5

L33 1.8uH, DIP

C72
47P

1.8uH,DIP
L26

C46
47P

L27 1.8uH,DIP

C48
47P

L28 1.8uH ,DIP

C50
47P

L31 1.8uH,DIP

C52
47P

R171

C73
47P

R71

75,1%

NC

R72

C47
47P

R76
75,1%

NC

R77

C49
47P

R79
75,1%

NC

R80

C51
47P

R83
75,1%

NC

R87

C53
47P

Q25
3906

+5VV

Q6
3906

+5VV +5VV

Q7
3906

+5VV

Q8
3906

+5VV +5VV

Q10
3906

+5VV+5VV

+5VV

1 2

1 2

+5VV

1 2

1 2

D2
1N4148

1 2

D3
1N4148

1 2

D4
1N4148

D5
1N4148

D6
1N4148

1 2

D7
1N4148

1 2

D8
1N4148

1 2

D9
1N4148

1 2

D18
1N4148

D19
1N4148

4

4

CVBS1

CVBS

CVBS_ST

G/Y

B/U SC

SCART CONNECTOR

SCART CONTROL

+12V

R84

680

R85
10k

VCC

R89

2.2k

RGB_SWITCH[ 2 ]

Y6

G/Y
ML
MR

CVBS_ST
ASPECT
RGB/CVBS#
R/V
B/U

Q27

2N3904

2 3

1

VCC

R100
150,1%

FS0[ 2 ]

FS1[ 2 ]

3

R53

300

R97

4.7K

3

L32 1.8uH,D IP

C54
47P

J5

1
2
3
4
5
6
7
8
9
10

SCART, 11P, PITCH=2.0M/M

FS1

Q26
8550

2 3

R52

1

10k

R57

1

2.2k

R93 0

R95

2 3

33

R99 2.2k

1

Pitch=2.0 m/m

R82 0

R85
1k

Q11
2N3904

2 3

Q14
8550

1

R96
75,1%

NC

R98

C55
47P

|
V

A21

C

B

E

3904 / 3906

R90

2.2k

CB56

0.1uf

+5VV

Q15
3906

1

RGB/CVBS#

2 3

ASPECT

R86
75

Q12
2N3904

+5VV

1 2

1 2

D10
1N4148

D11
1N4148

2

R/V SY

2

G/Y
B/U

R/V

YCbCr, 4P, PITCH=2.54M/M

J7

1
2
3
4

1

Y
Cr
Cb

CVBS
CVBS1

RESET#

MUTE_DAC

RGB_SWITCH

SC

VCC

Y[3..6]

AL
AR
ML
MR

G/Y

B/U

R/V

FS0
A21

ASDAT0

GND
VCC

+12V

-12V

1 2
3 4

VCC

L30

TO-92

R88
10k

R92 4.7k

RESET#

CVBS [5]
CVBS1 [5]

RESET# [2]

MUTE_DAC [5]
Y[3..6] [ 2 ]

AL [ 2 ]
AR [ 2 ]
ML [ 5 ]
MR [ 5 ]

G/Y

B/U
R/V

FS0 [ 2 ]
A21 [ 2 ]
ASDAT0 [ 2 ]

RGB_SWITCH [2]

GND

VCC [ 1 ]

+12V [ 1 ]

-12V

CY

GG

5

L29

NO_USER

Q9

FB

8550

2 3

1

Q13

1

2N3904

2 3

[ 5 ]
[ 5 ]
[ 5 ]

[ 1 ]

[ 1 ]

P1
S-VIDEO + RCA

+5VV

CB55

0.1uF

SY

CE26

+

47uF/16V

A2

MediaTek Incorporation

Title

COMMON89D_KHM310_V5

Size Docum ent Num ber Re v

Custom

Date: Sheet

VIDEO OUT PORT

1

45Thursday, June 24, 2004

of

4

5

4

3

2

1

MIC_R

MIC_L

R138
180k

R153

180k

R164

180k

10uF/16V

CE32

10uF/16V

R123

180k

CE35

10uF/16V

R147
180k

CE41

10uF/16V

CE43

10uF/16V

10uF/16V

10uF/16V
R110
180k

CE48

+

+

+

CE38

+

10uF/16V

+

+

CE20

CE28

R74

+

68k

+

R111
100k

R75

68k

R119

10k
R124
100k

R135

10k

R139
100k

R143

10k

R148
100k

R150

10k

R154

100k

R160

10k

R165

100k

R105

10k

C59

2200pF

C61
2200pF

C65
2200pF

C69
2200pF

C57

2200pF

R136

5.1k

C63
2200pF

R151

5.1k

R149

20k

R114
20k

R120

5.1k

R130

R144

5.1k

R157

R161

5.1k

3

R101

20k

C56 220pF

-12V

R106

5.1k

U13A

-

2

1

+

3

NJM4558 OPA

8 4

+12V

Notice

When use internal Adac must change follow value

CE29

+

10uF/16V

R108
100

A_MUTE

ML

Q16

1

2N3904

2 3

R101&R114=31K;C57&C59=1000PF;C56&C58=100PF

C57

2200PF

C58

220PF

C59

2200PF

C56

R101

2 3

2 3

2 3

2 3

Q20
2N3904

Q21
2N3904

Q22
2N3904

2 3

Q23
2N3904

Q24
2N3904

31K

20K

MR

SL

SR

CENT

SUB

2

R114

31K 100PF 1000PF 100PFInternal DAC 1000PF

20K

220PF

C58 220pF

-12V

U13B

-

6

+

5

NJM4558 OPA

8 4

+12V

C60 220pF

20k

R141

20k

20k

-12V

-

2

+

3

8 4

+12V

C62 220pF

-

6

+

5

8 4

C64 220pF

-12V

-

2

+

3

8 4

+12V

C68 220pF

-12V

-

6

+

5

8 4

+12V

U14A

1

NJM4558 OPA

-12V

U14B

+12V

U16A

1

NJM4558 OPA

U16B

NJM4558 OPA

7

7

NJM4558 OPA

7

CE33

+

10uF/16V

CE36

+

10uF/16V

CE39

10uF/16V

CE42

+

10uF/16V

CE44

+

10uF/16V

+

CB65

0.1uF

+12V

CB61

0.1uF

External DAC

R121
100

A_MUTE

1

R137
100

A_MUTE

1

R146
100

A_MUTE

1

-12V

CB67

CB66

0.1uF

0.1uF

R152
100

A_MUTE

1

CB62

CB63

0.1uF

0.1uF

R162
100

A_MUTE

1

G/Y
B/U
R/V

[1] A_MUTE

[ 1 ]
[ 1 ]

[ 1 ]

[ 1,2,3,5 ]

[ 2 ]

[ 2 ]
[ 2 ]

[ 2 ]

ACLK
ALRCK
ABCK SBCLK

ASDAT0
ASDAT1
ASDAT2

CVBS1

1

CVBS

2

MR

4

ML

5

7
8

10

11

SR
SL

SUB
CENT

MR
ML

R58

10 0805

+12V

R60

10 0805

-12V

[ 4 ]

G/Y
B/U [ 4 ]

R/V

[ 4 ]

A_MUTE

[4] CVBS

[4] CVBS1

VCC_AUDIO[ 1 ]

ASPDIF

ASDAT[0..2][ 2 ]

ACLK

ABCK

ALRCK[ 2 ]

MUTE_DAC

ML[ 4 ]
MR[ 4 ]

P2

RCA-AV8

Title

Size Doc um e n t N u mb er Re v

C

Date: Sheet

CVBS
CVBS1

AL[2]
AR[2]

ASPDIF

ASDAT[0..2]

ACLK
ABCK

ALRCK

MUTE_DAC

ML
MR

J6

1
2
3
4
5
6

6PIN 2.0

J8

1
2
3
4
5
6
7
8
9

J10

1
2
3
4
5
6

6PIN 2.0

-12V
+12V

DV33
VCC
VCC_AUDIO

GND

SACLK
SLRCK

SDAT0
SDAT1
SDAT2

9PIN 2.0

3

6

9

12

-12V
+12V
DV33[ 1 ]

VCC

GND

AL
AR

R125 33
R126 33
R127 33

R131 33
R132 33
R133 33

MIC_L

MIC_R

MediaTek Incorporation

COMMON89D_KHM310_V5

AUDIO OUT PORT

1

of

55Thursday, June 24, 2004

4

+12V

VCC

R102

R103

R

0

D12 1N4148

1 2

D14

R107
22k

1N4148

R129
0

11
12
14
13

19
20

R116
100k

A_DVDD

5

6

1

2
3
4

7
8
9

1 2

R112 470

+

CE31
100uF/16V

23

Q19

1

8550

R166

560

VREFP Modify For WM87xx Series

U15

DVDD

AVDD

VFEFP

DGND

AGND

VREFN

MODE
ML/I2S
MC/IWL

VOUT1L

MUTE

VOUT1R

MD/DM

VOUT2L
VOUT2R
VOUT3L

MCLK

VOUT3R
BCLK
LRC

DIN1
DIN2
DIN3

NC
NC

WMA8766

VMID

TESTREF1

DNC

D D

VCC

R115

4.7k

MUTE_DAC

R118 10K

DV33

R128

R134

10,0805

R145 0

R

A_DVDD

CB57

A_AVDD

A_AVDD

CB58

0.1uF

R142 R

SACLK
SBCLK
SLRCK

SDAT0
SDAT1
SDAT2

0.1uF

+

CE34
100uF/16V

+

CE37
100uF/16V

A_DVDD

A_DVDD

VCC_AUDIO

C C

B B

HARDWARE:IIS 24BIT

CB68

ASPDIF

0.1uF

A A

5

R155

100

R163 22

C66
100pF

R156

75

OPTICAL

C70

27pF

C67

100pF

CB69

0.1uF

VCC

1

28
17

27
16

21
22
23
24
25
26

18

15
10

R159
22

23

Q17

8550

D15 1N4148

D17

+

A_AVDD

CB64

0.1uF

R158

110

CE45

+

10uF/16V

+

CE27
470uF/16V

1 2

1N4148

1 2

CE47
220uF/16v

CB59

DAC_ML
DAC_MR
DAC_SL
DAC_SR
DAC_CENT
DAC_LFE

+

10uF/16V

RCA

123

1
2
3

0.1uF

CE40

P4

P3

SPDIF

R122 100k

DAC_VREFP

C71

0.1uF

R140

CB60

0.1uF

4

R113 1k

330

A_MUTE

-12V

A_AVDD

DAC_ML

DAC_MR

-12V

DAC_SL

DAC_SR

DAC_CENT

DAC_LFE

8

8-13

8-14

8-15

MTK DECODER

MTK1389D decoder board service manual

Please check the power supply to decoder board is normal before checking

the decoder board.

 Check the power supply voltage has the normal wave.

+5V+12V-12V3.3V(U2), 1.8V(U1)

 Check reset circuit (reset at high electrical level)
 Check crystal circuit (27MHz) and SDRAM frequency (108MHz)

Decoder board repair flow chart: (Diagram not included)

1.

VFD no output

Check P6 socket and plug connection bad Connect

good

Check CLK, DATA, STB wave out with check KB board

without

Check MT1389D PIN94,95,96 short circuit

short

Replace MT1389D

8-16

MTK DECODER

2.

CVBS no output(audio/tray door normal)

Check the video cord connection bad connect correctly

good

Check video setup (software menu) bad Set to CVBS

yes good

Check Q7 emitter voltage between 1.0±0.2VPP

(use standard color band signal disc to test)

yes no
Check Q7 basal pole between 0.4±0.2VPP

no

remove Q7, check PCB Q7 base pole between

0.4±0.2VPP no replace Q7

no

Check MT1389D PIN175 output short circuit

yes

replace IC MT1389D

8-17

t

MTK DECODER

3. YUV no output (Audio normal)

Check YUV port connected to TV correct bad

Correctly

Connect YUV

yes

Check video setup to YUV no set to YUV

yes

yes Check Q8, Q10, Q15 emitter voltage

between 0.7±0.14VPP

no

yes Check Q8Q10Q15 base pole voltage

between 0.1±0.14VPP

no

removeQ8, Q10, Q15, check Q8, Q10, Q15

base pole voltage between 0.1±0.14VPP

no

no

Check MT1389D PIN179181

182short circui

yes

Replace MT1389D IC

8-18

ReplaceQ8,Q10

Q15

MTK DECODER

4.

VGA video no output (VGA contains R, G, B

signal and line/field sync signal. R, G, B signal

testing method is the same as YUV

Check VGA connect bad Connect correct

Good

Check DVD system (PAL/NTSC) is the same as TV setting. (In
VGA-PAL, line sync frequency is 31250Hz, field sync frequency is 50Hz.
In VGA-NTSC, line sync frequency is 31500Hz, field sync frequency is
60Hz

no yes

Set DVD PAL/NTSC Check MT1389D PIN 4445 short

circuit under normal frequency

no

Replace MT1389D

8-19

MTK DECODER

5. SCART video no output

Refer to manual

no

In Scart-CVBS, “RGB-SWITCH” is

3.3V high, in RGB, it is 0V.
Check MT1389DPIN169

Check Scart port connect correct

Check DVD player is set to

SCART(CVBS/RGB

yes

bad

Check RGB signal, SCART sockets

PIN15, 11, 7. Method refer to YUV

In Scart-CVBS, PIN167 voltage should be

0-0.4V, in Scart-RGB, it should be 1-3VCheck

good

PIN167 voltage

SCART no audio output

Checking method refer to Left/Right
Channel, Check SCART sockets PIN2
PIN6

8-20

MTK DECODER

p

s

wav

e 5 .6

V V

g

ght) with s

wave

5.6V V

s

wave

.6

V V

s

wave signa

s

wave signa

C

6.

No 5.1 channel

ut

out

No Left/Right

A B C

load 1K signal disc, check L37 (left

channel),L38 (right channel) with

in-

Replac

e U14

MUTE

Check “DAC-ML”,

yes

“DAC-MR” with

Check

in-

PP



l

No Surround

No Center,

No output

Check connection

ood

bad

Connection refer

to manual

load 1K signal disc, check L39

(surround left),L40 (surround

ri

in-

load 1K signal disc, check L41
(center), L42 (subwoofer) with

PP

no

Check “A-MUTE” signal is minus voltage

Replace
U14

yes

yes

Check “DAC-SL”,

“DAC-SR” with

in-

l

“DA

in-

“DAC-CETL”,

5

Check

-LFE” with

PP

yes

Replac
e U14

Check audio DAC, U12, WM8766 output

No KARAOKE output

Check Mic

board

Use signal generator to input 1KHz, 0.1VPP sin-wave, check

no

whether P1 port “MIL-L”, “MIC-R” has sin-wave signal

Check U14 circuit normal (Refer

to Left/Right channel Checking)

8-21

no



yes

MTK DECODER

7.

Servo initial work process

Power On

System initiated, MT1389D reset and

initiated, wait for task

yes

Tray door close?

no

Close tray door

Pickup in inner circle?

no

Pickup move outward

yes

Machine initiatedMT1389D

Check disc

Without disc

With disc

Auto adjust

Wait for order

8-22

MTK DECODER

Check disc

Activate pickup

Focus loop move up

Focus loop move down

no

Disc check error

yes

Focus loop move up

Focus loop move down

Pickup LD off

Initiate auto adjust

Action repeat

8-23

MTK DECODER

8.

Check MT1389D

PIN39(TROPEN),

PIN103(TRCLOSE)

Check IC U3

Eject tray abnormal

(CVBS normal)

Check “TROPEN”, “TRCLOSE” signal level

normal (When open tray, “TROPEN” should be

high level, “TRCLOSE” should be low level

yes

Check “LOAD+”, “LOAD-“ voltage

no

larger than3.0V (connect multimeter black

pen to “LOAD-”, red pen to “LOAD+”

yes

Check “P4” or “P5” connection with loader



Close tray abnormal (CVBS normal)

Check MT1389D

PIN39(TROPEN),

PIN103(TRCLOSE)

Check IC U3

Check “TROPEN”, “TRCLOSE” signal level

no

normal (When open tray, “TROPEN” should be

low level, “TRCLOSE” should be high level

yes

Check “LOAD+”, “LOAD-“voltage larger

no

than3.0V (connect multimeter red pen to

“LOAD-”, black pen to “LOAD+”

Check “P4” or “P5” connection

8-24

8 Repair of key board

8-25

8 Repair of key board

8-26

b

board connectio

SM169

Repair of key board

KB BOARD SERVICE PROCEDURE

Check other components

Power on

LED HAS
DISPLAY?

Check Power

oard and KB

Check KB board
input power
normal

Check IC

4

LED work
properly?

YES

NO

YES

n

good

YES

OK

bad

Connect
correctly

NO

Make Power board
under normal supply

YES

Replace IC

NO

Replace LED

8-27

Repair of MIC board

6PIN/2.5

-12V

6

+12V

5
4

MIC1

3

GND

2

MIC2

1

PHO401

CN401

C401
3300pF

L401

3.3uH

C407 0.1uF

E403 100uF/16V

R401

1k

C402
3300pF

C403

0.1uF

R403
22k

12

+12V

84

3

+

2

-

-12V

R407 51k

C404 680pF

R405

2k

5
6

C405 100pF

R406

2k

U401A
4558

+12V

84

+

-

-12V

R408 10k

1

U401B
4558

7

C406 0.1uF

12

E402 100uF/16V

R409
10

R410

10k

R-VAR1

3

vr401

3

6

6

2

5

2

5

4

4

1

1

R417
10

E401

1 2

10uF/16V

E404

10uF/16V

12

8-28

b

Repair of MIC board

MIC BOARD SERVICE PROCEDURE

NO MIC

Microphone
normal?

MIC signal wire
connects to

Volu me
potentiometer

MIC board power

When MIC has
input, IC 4558 Pin

Check decoder

oard

NO

NO

NO

NO

NO

NO

NO

NO
NO

NO

NO

NO

Replace microphone,
return normal?

Connect correct, return
normal?

Replace potentiometer,
return normal?

Check Power board and
Mic board connecting
wires

Replace IC4558, return
normal?

8-29

9-1