dpc-7400 daewoo dvd portable player

34
Service Manual Portable DVD Player Model: DPC-7400 Series S/M No. : OSPC740001 May. 2005 Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts lis t.

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Page 1: Dpc-7400 Daewoo Dvd Portable Player

Ser v ice M a nua lPortable DVD PlayerModel: DPC-7400 Series

S/ M No. : OSPC740001

May. 2005

C aution: In this Manual, some parts can be changed for improving,

their performance without notice in the parts list.

Page 2: Dpc-7400 Daewoo Dvd Portable Player

Revision Record

Date Rev No Section Description

17/ Oct./ 2005 0.1 New edition

Design and specifications are subject to change without notice.

All trademarks used in the specifications are the property of their respective owners.

Page 3: Dpc-7400 Daewoo Dvd Portable Player

1. General Descriptions……………………………………………………

1.1. Model Features… … … … … … … … … … … … … … … … … … … … … … … … … .

1.2. Information… … … … … … … … … … … … … … … … … … … … … … … … … … …

2. Electrical Characteristics………………………………………………

2.1. Optical Characteristics… … … … … … … … … … … … … … … … … … … … … … …

2.2. Electrical Characteristics… … … … … … … … … … … … … … … … … … … … … ..

2.3. System Block Diagram… … … … … … … … … … … … … … … … … … … … … … .

3. Power……………………………………………………………………….

3.1. Power Supply… … … … … … … … … … … … … … … … … … … … … … … … … … .

3.2. Rechargeable Battery. … … … … … … … … … … … … … … … … … … … … … … … .

4. Dimension & Physical Characteristics…………………………….

4.1. Outline Dimension… … … … … … … … … … … … … … … … … … … … … … … … .

4.2. Physical Characteristics… … … … … … … … … … … … … … … … … … … … … … ..

4.3. Exploded View… … … … … … … … … … … … … … … … … … … … … … … … … …

5. Regulatory Standards…………………………………………………..

5.1. Safety… … … … … … … … … … … … … … … … … … … … … … … … … … … … … ..

5.2. EMI… … … … … … … … … … … … … … … … … … … … … … … … … … … … … … .

5.3. Ergonomics… … … … … … … … … … … … … … … … … … … … … … … … … … … .

6. Service Tools and Equipment……………………………………….

6.1. Service Tools and Equipment .… … … … … … … … … … … … … … … … … … … .

6.2. Storing and Handling Test Discs… … … … … … … … … … … … … … … … … … ..

6.3. Notes… … … … … … … … … … … … … … … … … … … … … … … … … … … … … ..

7. Spare Parts……………………………………………………………….

7.1. key Parts List..… … … … … … … … … … … … … … … … … … … … … … … … … …

8. Trouble shooting…………………………………………………………

8.1. Error Code Table … … .… … … … … … … … … … … … … … … … … … … … … … .

8.2. Debug & Trouble Shooting … … ..… … … … … … … … … … … … … … … … … …

1

1

2

3

3

3

4

11

11

11

13

13

13

14

15

15

15

15

16

16

16

17

19

19

20

20

21

Page 4: Dpc-7400 Daewoo Dvd Portable Player

- 1 -

1 General Descriptions

1.1 Model Features

Video: DVD Playback, MPEG4(option) ,DivX(DivX Model),Kodak Picture CD compatible

& JPEG readable

Audio: CD, CD-R, CD-RW, MP3, WMA Playback

Firmware Upgradable

Dolby Digital Output

7" active-matrix TFT screen, 16:9 wide aspect ratio

Composite Video Output

Ultra dimension & light weight: 200mm(L) x 155mm(W) x 38mm(H) / 900g (around)

Slim size wireless remote control

Rechargeable battery pack

12-volt car cigarette lighter cable

Universal AC/DC power adapter

Audio/video cable for TV connection

Built-in stereo speakers

Two Stereo headphone jack

Parental Lock

- 15 -

Anti Shock Protection

Page 5: Dpc-7400 Daewoo Dvd Portable Player

- 2 -

1.2 Information

Disk Format DVD, VCD, CD, MP3, CD-R, CD-RW, MPEG4 (OPTION),JPEG,

Kodak Picture CD, DivX(DivX Model),WMA

Video System NTSC / PAL/Auto

Video Decompression MPEG-2 (ISO/IEC-13818), MPEG-1

Video Output 800~1200mVpp/75 ohm

Audio Characteristic 2-Channel Analog

Analog Output 1.0~2.0Vrms/10K ohm

Frequency Response DVD: 48kHz Sampling: 20Hz-20kHz CD: 20Hz-20kHz

S/N Ratio <= -65dB

Dynamic Range <= -85dB

Audio Output Noise &Distortion Less than<= 0.01%

Digital Output SPDIF

Headphone Jack 32ohm (30Mw) > 8ohm

LCD Display 7” active-matrix TFT type

Audio / Video Section Audio input/output x1 Video input/output x1 S-Video / Coaxial output x1

Audio Section Digital Output: Coaxial x1

Headphone Jack Headphone Jack x1

Line Voltage AC 100~240 VAC ± 10%(50/60Hz), (Adapter)

Power Consumption 12W (DC 12V, 1.0A)

Remote Control DC 3V Infra-red

Dimensions 200mm(L) x 155mm(W) x 38mm(H)

Weight 900 g (around)

Accessories Slim Size Remote Controller with 3V Battery 12-volt Car Cigarette Lighter Cable Universal AC/DC Power Adapter Audio Cable / Video Cable Ni-MH Rechargeable Battery Pack S-video / Coaxial cable

zhang_gq
Page 6: Dpc-7400 Daewoo Dvd Portable Player

- 3 -

2 Electrical Characteristics

2.1 Optical Characteristics

Parameter Specifications Unit Screen Size 7.0 (16:9 diagonal) inch

Display Format 1400 (H) 234 (V) dot

Active Area 154.08 (H) 86.08 (V) mm

Dot Pitch 0.107 (H) 0.370 (V) mm

Pixel Configuration Stripe

Outline Dimension 166.0 (W) 100.0 (H) 7.2 (D)(typ.) mm

Surface Treatment Anti-Glare and Hard Coating

Weight 180 ± 10 g

2.2 Electrical Characteristics

DVD/ SVCD/ VCD/ CD system decoding, packeted element streams and audio, video element streams.

Fully digital servo processing (focusing, tracking, sledge and spindle servo control)

Fully digital calibration (focusing/ tracking offset and balance)

Digital phase lock loop with phase equalizer

Support Audio/ Video/ Photograph decoding and programming

Programmable Y/C delay relationship

Embedded micro-controller, up to 50MHz operating frequency

1.8V and 3.3V dual power supply, 208 pin PQFP

Page 7: Dpc-7400 Daewoo Dvd Portable Player

- 4 -

2.3 System Block Diagram

2.3.1. The System Block Diagram & the Block's Function Description

DC To DC MP1580

1. Loader DM-520A

2. Servo +MPEG MT1389D/MT1389C

DISPLAY 7” TFT LCD PW070XU3

INVERTER

TFT LCD Driver IR3Y29B +HX8806

zhang_gq
DC to DC MP1580 1. Mech MG9807H1 2. Servo +MPEG MT1389D DISPLAY 7” TFT---LCD PW070XS2 INVERTER TFT---LCD driver IR3Y29BM +PVI-1004B
Page 8: Dpc-7400 Daewoo Dvd Portable Player

- 5 -

2.3.2 Schematic Circuit Diagram

( 1 ) P O W E R _ M P S

1

DELETA

9VIN

+3.3V +5V

NC

TR

_5V

CT

R_5V

LDO

_AV

33

RF

V33

NC

TR

_5V

9VIN

+5V

+3.3V

CT

R_5V

NC

TR

_5V

+3.3V

RF

V33

+3.3V

LDO

_AV

33

RM

439K

QM

1O

PE

N/3904

1

2 3

UM

1

MP

S1580

1234

8765

BS

Vin

Vsw

GN

D

SyncE

NC

omp

FB

CM

7220uF

/6.3V/LU

D1

LED

1

1

3

2

C135

22uF

C410uF

UM

2

MP

S1580

1234

8765

BS

Vin

Vsw

GN

D

SyncE

NC

omp

FB

LM4

6.8uH

RM

7O

PE

N

R1330O

+C

120220uF

/6.3V/lu

RM

330.9K

RM

12O

PE

N/10K

CB

590.1uF

RM

114.7K

/open

+C

121220uF

/6.3V/lu

L26

FB

RM

110K

1%

R156

4.7k/open

CB

600.1uF

RM

1010K

RM

816.9K

L27

FB

RM

9O

PE

N

RM

233R

Q1

39041

2 3

CM

30.022uF

CM

1

0.01uF

CM

5100pF

CM

10100pF C

M9

0.022uF

CM

8

0.01uF

RM

610K

1%

LM2

6.8uH

RM

510K

C136

22uF

C11910uF

DM

1

DIO

DE

1 2

CM

2

100uF/10V

/LU

DM

2

DIO

DE

1 2

LM122uH

LM322uH

R2

330O

zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 9: Dpc-7400 Daewoo Dvd Portable Player

- 6 -

(2) POWER FOR TFT

1 1

1

11

11

-10V_T

FT

+15V_T

FT

+7.5V_T

FT

VS

YN

C#

PO

WD

ET

_MC

U

+3.3V_T

FT

+5V_T

FT

+5V_T

RA

N

VIN

+3.3V

+5VV

18

+3.3V_T

FT

+5V_T

RA

N

9VIN

VO

UT

9VIN

CT

R_LO

AD

CT

R_A

UD

IO

PO

WD

ET

_MP

EG

CT

R_T

FT

5V

PO

WD

ET

_MC

U

+5V_T

RA

N

HS

YN

C#

VC

C

+5V_T

FT

+7.5V_T

FT

+3.3V_T

FT

-10V_T

FT

VC

C

+15V_T

FT

+3.3V

V18

+3.3V

+5V

9VIN

PO

WD

ET

_MC

U

PO

WD

ET

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EG

CT

R_LO

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CT

R_A

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PO

WD

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PO

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CT

R_T

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5V

+5V_T

RA

N

CT

R_T

FT

5V

+3.3V+5V

+7.5V_T

FT

+5V_T

RA

N

-10V_T

FT

+15V_T

FT

+3.3V

+3.3V

+3.3V

+C

1347uF

/25V/LU

C15

0.1uF

C118

0.1uF

+ -

U3A

LM393

3 21

84

C7

100uF/10V

/LU

R3

10k(8.2K)

R8

0(1.8K)

R9

3.9K

L220uH

Q2

BS

H1051

32

C1

100uF/6.3V

/LU

R15

1.6M

U1

RT

9167A-185C

S

1 234

5678

SH

DN

-IN

OU

TB

P

GNDGNDGNDGND

R6

3.3K

R18

560K

C18

0.1uF

+ -

U3B

LM393

5 67

84

C17

1000pF

D4

1N5819

12

L120uH

Q18

OP

EN

/39041

2 3

C2

0.1uF

C11

22uF/25V

/LU

J1

PO

WE

RJA

CK 132

C50.01uF

R11

20K

R158

330O

C10

47uF/25V

/LU

CO

N1

BA

TTER

Y 21 3 4

VIN

GN

D

OU

TP

DE

T

R5

3K

+C

947uF

/25V/LU

U6

BA

05SF

P

45

3

21

6 VO

UT

NC

GND

VIN

CTL

GND

R7

3K

+C

16100uF

/16V/LU

R157

OP

EN

/10K

D2

RB

053L-30

12

R159

4.7K/open

R13

20K

R160

4.7k/open

C3

47uF/25V

/LU

D3

1N5819

12

C6

100uF/6.3V

/LU

R12

220R

C12

0.1uF

U22

RT

9262

1

2

3 4

5

6

7

8

GND EX

T

LFB

LDO

O

FB

VDD

LX

CE

R4

47K

U5

TE

R9.5*100M

1

3

6

57

8

1

3

6

57

8

R16

0R

R10

47K

R14

1M

R17

200K

D5

1N5819

12

C14

0.1uF

zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 10: Dpc-7400 Daewoo Dvd Portable Player

1

1

1

1

Tr-

10

VR GND

GND

C

C8911

BGND

RS

-232

324 619 5

PD

17

VccV1.7

18

B

C

15

Vs(Vc)

LD(DVD)

HOP1200/1200N(1240)

D

16

A

1

14 1

GND(NC)

2

VR F

720

E

12

Vcc

21Fo+

Very Im

portant tored

uce N

oise

22

2SB1132

VRF(1.4V)

23Tr+

HITACHIHOP1200/1200N(1240)

C15 closed to Pin186

PD(Monitor)

LD(CD)

E413

2

Fo-

3

AUDIO INTERFACE

MEMORY

FLASHIIC

VIDEO INTERFACE

DQ

M[0..1]

A[0..21]

AD

[0..7]

BA

[0..1]D

Q[0..15]

AS

DA

T[0..2]

Y[3..6]

MA

[0..11]

DM

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XO

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DC

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#SC

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SD

A

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PD

IF

AL PC

E#

ALR

CK

PW

R#

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ST#

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S#

CTR

_TFT5V

VS

CK

VS

DA

PW

R#

MU

TE

_DA

C

PC

E#

WE

#

DC

LK

AC

LK

AR

RA

S#

VS

YN

C#

HS

YN

C#

FMO

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XO

C

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IN

B

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DM

SO

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V1P4

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TRO

UT

AC

DQ

0

AR

DACVDD3

JITFN

DQ

14

OP

O

BA

0

TRS

O

MA

1

V20

V18

V1P

4

LDO

2

A4

Y4

TEZIS

LV

FMO

TRO

PE

N

T+

DM

O

JITFN

A17

RFVDD3

DQ

15

DQ

13

VSTB

AD5

SL-

SDA

A15

TE

O

SU

BD

V1P

4

RFVDD3

FM

SO

LD-C

D

A

LD-D

VD

A5

XT

ALI

DQ

6

RXD

A10

A1

A13

AD3

DQ

10

MUTE_DAC

B

V1P

4

A7

A16

MD

I1

RF

O

PLLVDD3

A2

FS

MA

5

VSDA

UWR#

DQ

11

SCL

MA

4

AV

CC

1

DACVDD3

APLLVDD3

AD4

OP

+

JITFO

MA

3

SL-

V1P

4

ASDAT2

SU

BC

Y5

DQ

3

DQ

9

CA

S#

TXD

MD

I2

OP

-

Y3

AD1

LDO

1

E

PLLV

DD

3

RF

VD

D3

DQ

7

A21

SL+

SP

-

ALR

CK

MA

10

MA

9

RFO

N

PRD#

MD

I2

E

HS

YN

C#

IR

AL

FS0

DQ

4

FM

SO

RF

V18

AP

LLVD

D3

V20

LDO

1

V20

RxD

B

VS

YN

C#

Y6

F+

A

ASDAT1

V18

MA

6

RFO

P

MA

8

AD6

A12

F-

AV

CC

1

ST

BY

RESET#

TRS

O

CS

#

SU

BA

SP

-

DQ

2

BA

1

AD7

A11

A9

RF

VD

D3

DQ

8

VSCK

ALE

PWR#

V2P

8

SP

+

OP

O

RGB_SWITCH

AD

IN

F

FO

SO

FOO

SL+

TRO

DQ

1

FO

SO

LIMIT

DC

LK

D

AC

LK

INT0#

RFVDD3

RF

OD

Q5

URST#

URD#

V2P

8

A6 O

P+

V1P

4

FE

O

ASPDIF

A14

V1P

4

DACVDD3

ADACVDD3

DC

KE

AD

AC

VD

D3

A19

XTALI

MA

11

VR

EF

A18

MA

2

ASDAT0

SP

+

F

A8

AD0

A3

SU

BB

RFV18

DQ

M1

MA

7

A20

DQ

M0

TRCLOSE

OP

-

DQ

12

WE

#

MA

0

T-

ALRCK

RA

S#

AD2

PCE#

ICE

AB

CK

A0

D

LDO

2

TxD

C

JITFO

MD

I1

RF

V33

TRIN

TR

CLO

SE

TRO

UT

CT

R_5V

TRO

PE

N

INT/E

XT

INT/E

XT

IR

AC

LK

AS

DA

TA

3M

C_D

AT

AA

SD

AT

A2

RE

SE

T#

GN

D

AB

CK

AS

DA

TA

2V

SC

KV

STB

VS

DA

LDO

_AV

33

RF

V33

+3.3V

DV

33

+3.3V

DA

CV

DD

3

GN

D

GN

D

VS

DA

AC

LK[5]

PW

R#

[3]

UR

ST#

[1]

PC

E#

[3]

CA

S#

[3]

MA

[0..11][3]

FS

0[4]

AB

CK

[5]

CTR

_TFT5V[5]

A[0..21]

[3]

MU

TE

_DA

C[5]

PW

R#

[3]

SD

A[3]

AD

[0..7][3]

BA

[0..1][3]

DQ

M[0..1]

[3]

ALR

CK

[5]

PR

D#

[3]

AR

[5]

PC

E#

[3]

DC

LK[3]

WE

#[3]

Y[3..6]

[ 5 ]

AS

PD

IF[4]

CS

#[3]

RA

S#

[3]

DC

KE

[3]

VS

CK

AL

[5]

AS

DA

T[0..2]

[5]

SC

L[3]

AV

CC

[1 ]

DQ

[0..15][3]

HS

YN

C#

[ 4 ]V

SY

NC

#[ 4 ]

INT/E

XT

[5]

VC

CM

O_V

CC

LDO

_AV

33

DV

33

+3.3V

RF

V33

V18

MO

_VC

C

V18

AD

AC

VD

D3

MO

_VC

C

V18

V18

V18

AV

CC

+3.3V

VC

C

RF

V33

LDO

_AV

33

V33

DV

33

DV

33

DV

33

+3.3V

DV

33

DV

33

DV

33

+3.3V

DV

33

AV

CC

VC

C

TP6

TP

23

TP

12

C77 0.1uF

L34F

B

C82 0.47uF/N.C

C105C

TP

15

R200

33k

L41

FB

CB

86

0.1uF

TP

43

TP

32

C100

1uF

+C

E56

47uF/16v

TP

13

R197

4.7

R190

10k

C8

+c88=17nf0603C

+C

19

47uF

L51

FB

CB

90

0.1uF

TP

39

TP

16

C114

1000p

CB

75

0.1uF

L52

FB

+C

E46

10uF/25v

R191

1k0603R

R194

0

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MB

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0

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FMO

DM

O

HIGHA4HIGHA5

HIGHA7DVDD3A16IOWR#DVDD3

IOA

6

AD6

AD2AD1

IOA18

DVSSIOOE#IOA1DVSS

HIGHA6

ALE

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7H

IGH

A0

IOCS#

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IOA21

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HIGHA3

HIGHA1

AD5

IOA20

DVSS

HIGHA2

DVDD18AD7A17DVDD3IOA0UWR#URD#UP1_2UP1_3GPIO6UP1_4UP1_5

IR

UP1_6DVSS

ADCVDD3ADCVSS

UP1_7UP3_0UP3_1UP3_4UP3_5GPIO7ICEPRST#

INT0#DVDD3

AC

LKA

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KD

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SG

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SS

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D4

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6R

D5

RD

7D

QM

0

HRFZC

IREF

SV

DD

3

RFGC

RFGND18ADACGND

IDACEXLPPLLVSS

RFRPACRFRPDC

JITFN

RFGND

RFVDD3

LPFOP

LPFIPLPFIN

LPFONPLLVDD3

XTALIJITFO

RFVDD18

APLLCAPAPLLVSS

RB

DACVSSAG

ADACVDD3

DACVDDADACVSSB

CVBS

FSDACVSSC

ASDATA0

DACVDDCSPDIF

MC_DATADVDD3

VREF

ASDATA3ASDATA2ASDATA1

ALRCK

XTALO

GP

IO0

IOA

2D

VD

D18

IOA

3IO

A4

IOA

5

AD3AD4

DACVDDB

APLLVDD3

VCMAL

AR

R201

15k

R188

0

+C

E100

220uF/16V

C93

0.1uF

C80

10uF/10v

R185

10k

TP

25

+C

E58

47uF/16v

C103

1uF

TP

41

C83

2200pF

R176

6.8

R169

0

R72

10K

CB

80

0.1uF

TP

22

C7820pF

C106

0.1uF

TOP

HA

1

HE

AD

ER

24 SM

D0.5 T

OP

123456789101112131415161718192021222324

SW

1P

US

HB

UTTO

N

1 4

2 3

CB

71

0.1uF

R167

0

C87 0.1uF

C92 0.047uF

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E51

47uF/16v

R217

R

R19

0

U20B

74HC

04

34

147

TP

51

L33

FB

R166

750k

K1

PO

WE

RO

N/O

FF

231

J66x1 W/H

OU

SIN

G_180

123456

TP

34

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4x1 W/H

OU

SIN

G

1234

TP

24

TP

50

R155

10K

C107

330pF

C115

C

TP

26

C74

0.1uF

C76

2200pF

TP

11

SW

2

TFT_SW

ITCH

1 4

2 3

TP

35

R189

0

TP

10

CB

84

0.1uF

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10K

C89 0.1uF

TP

20

TP

46

L4FB

+C

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100uF/16v

C88

16800PF

0603C

Q252S

B1132

1

3 2

R20

0

TP

48

L3FB

C117

22p

TP

28

R209

20k

- 7 -

(3) SERVO&MPEG

zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 11: Dpc-7400 Daewoo Dvd Portable Player

- 8 -

(4) SDRAM&FLASH&EEPROM

TSOP 48 pin

IIC DRAM

FLASH

16Mb

32Mb

8M 16M 32M FLASH

delete

DQ

[0..15]

AD

[0..7]

BA

[0..1]D

QM

[0..1]

MA

[0..11]

A[0..21]

A9

A3

AD

3

A1

A19

A4

AD

6

AD

1

A17

A16

A13

A14

AD

0A

2

A6

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7A

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2

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PC

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PR

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DC

KE

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CLK

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20

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LS

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6

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E

DQ

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2

MA

1

MA

10

DQ

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DQ

3

SD

CLK

DR

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#

MA

6

DQ

10DQ

0M

A6

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5

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CLK

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DR

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2

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10

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6

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11

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15

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DC

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13

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4

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14

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3

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5

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0

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11D

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AA

21A

21

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6

SD

CK

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DQ

1

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15

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5

DB

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0

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10

DQ

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11

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4

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8

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5

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12

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6

MA

0

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9M

A10

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4

SD

A[ 2 ]

DQ

M[0..1]

[ 2 ]B

A[0..1]

[ 2 ]

WE

#[ 2 ]

PC

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[ 2 ]

CA

S#

[ 2 ]

AD

[0..7][ 2 ]

CS

#[ 2 ]

DC

KE

[ 2 ]

PR

D#

[ 2 ]

SC

L[ 2 ]

DC

LK[ 2 ]

PW

R#

[ 2 ]

MA

[0..11][ 2 ]

DQ

[0..15][ 2 ]

RA

S#

[ 2 ]

A[0..21]

[ 2 ]

VC

C[ 1 ]

GN

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

DV

33[ 1 ]

SD

33

DV

33S

D33

SD

33

SD

33F

LAS

H_V

CC

FLA

SH

_VC

C

FLA

SH

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C

SD

33

VC

C

FLA

SH

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CD

V33

SD

33

SD

33

SD

33

SD

33

SD

33

SD

33

R68

680

CB

38

0.1uF

L23F

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CB

52

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42

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33

CB

45

0.1uF

L24N

O_U

SE

R66

33

CB

50

0.1uF

R254

680

U8ES

MT M

12L16161A-7 1 234 567 8910 111213

14 15 16 17 18 19 20 21222324

25

26 27282930313233 34 353637

38 394041 424344 454647 4849

50

VC

C

DQ

0D

Q1

VS

SQ

DQ

2D

Q3

VC

CQ

DQ

4D

Q5

VS

SQ

DQ

6D

Q7

VC

CQ

DQ

ML

WE

CA

SR

AS

CS

BA

/A11

A10

A0

A1

A2

A3

VC

C

VS

S

A4

A5

A6

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A8

A9

NC

CK

EC

LK

DQ

MH

NC

VC

CQ

DQ

8D

Q9

VS

SQ

DQ

10D

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VC

CQ

DQ

12D

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SQ

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14D

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S

CB

54

0.1uF

CB

37

0.1uF

CB

41

0.1uF

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MT

M12L64164A

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TSO

P54

1 2412 579 81046 1113

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41 29303132333436 37 383940

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DQ

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A5

A6

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CK

EC

LK

DQ

MH

NC

VC

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VS

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10k

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49

0.1uF

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33x4

12

34

56

78

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220uF/16V

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48

0.1uF

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CB

36

0.1uF+

CE

22

220uF/16V

CB

40

0.1uF

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EE

PR

OM

24C16

SO

P-8

12345 6 7 8

NC

NC

NC

GN

DS

DA

SC

LW

PV

CC

CB

44

0.1uF

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53

0.1uF

CB

47

0.1uF

U7ES

MT M

12L16161A-7 1 234 567 8910 111213

14 15 16 17 18 19 20 21222324

25

26 27282930313233 34 353637

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50

VC

C

DQ

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2D

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4D

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6D

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VC

CQ

DQ

ML

WE

CA

SR

AS

CS

BA

/A11

A10

A0

A1

A2

A3

VC

C

VS

S

A4

A5

A6

A7

A8

A9

NC

CK

EC

LK

DQ

MH

NC

VC

CQ

DQ

8D

Q9

VS

SQ

DQ

10D

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VC

CQ

DQ

12D

Q13

VS

SQ

DQ

14D

Q15

VS

S

L25F

B

CB

51

0.1uF

CB

39

0.1uF

U11

ST

M29W

160/MX

29LV800(160)

252423222120191881028

4716

29313335

726

38404244303214 3639414345372711 9

3446

64 5321481712

A0

A1

A2

A3

A4

A5

A6

A7

A8

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OE

BY

TE

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D0

D1

D2

D3

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CE

D4

D5

D6

D7

D8

D9

WP

/AC

C

D11

D12

D13

D14

D15

VC

C

GN

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WE

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D10

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D2

A10

A12

A11

A13

A14

A15

A16

A17

RE

SE

T

R70

10k

CB

43

0.1uF

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47uF/16V

CB

46

0.1uF

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33

R63

33

R61

R+

CE

25

47uF/16V

zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 12: Dpc-7400 Daewoo Dvd Portable Player

- 9 -

(5) VIDEO OUTPUT

1

1

TFT I/O

2N3904 3

C

E

2

B1

TFT_CV

BS

-10V_T

FT

9VIN

+3.3V_T

FT

+7.5V_T

FT

+15V_T

FT

+5V_T

FT

AS

PD

IF

Y[3..6]

CV

BS

_TF

T

VID

EO

_TV

INT/E

XT

P/N

AS

PD

IF

+5V_T

RA

N

TF

T_O

UT

TFT_CV

BS

SV

IDE

O_Y

SV

IDE

O_C

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zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 13: Dpc-7400 Daewoo Dvd Portable Player

- 10 -

(6) AUDIO OUTPUT

1

11

VR

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zhang_gq
DELETA 9VIN + 3.3V + 5V NCTR_5V CTR_5V LDO_AV33 RFV33 NCTR_5V 9VIN + 5V + 3.3V CTR_5V NCTR_5V + 3.3V RFV33 + 3.3V LDO_AV33 R1 330Ω CM7 220uF/6.3V/LU LM4 6.8uH R2 330Ω CM2 100uF/10V/LU LM2 6.8uH L26 FB L27 FB CB59 0.1uF CB60 0.1uF C135 22uF C136 22uF D1 LED1 1 3 2 QM1 OPEN/3904 1 2 3 C4 10uF C119 10uF RM11 4.7K/open RM12 OPEN/10K RM9 OPEN RM3 30.9K RM7 OPEN RM10 10K RM110K 1% UM1 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB UM2 MPS1580 1234 8765 BS Vin Vsw GND Sync EN Comp FB + C120 220uF/6.3V/lu R156 4.7k/open + C121 220uF/6.3V/lu CM5 100pF CM1 0.01uF CM3 0.022uF RM8 16.9K LM3 22uH LM1 22uH RM610K 1% CM8 0.01uF CM9 0.022uF CM10 100pF DM2 DIODE 1 2 DM1 DIODE 1 2 RM4 39K RM2 33R Q1 3904 1 2 3 RM5 10K
Page 14: Dpc-7400 Daewoo Dvd Portable Player

- 11 -

3 Power

3.1 Power Supply

Input voltage:

Normal voltage: 100 to 240 Vac. Variation range: 90 to 264 Vac.

Input frequency:

Normal frequency: 50 to 60 Hz. Variation range: 47 to 63 Hz.

Input current: 0.6 arms max. at any input voltage and max. DC output rated load.

Inrush current: 70 amps max. cold start at 240 Vaz. Input, with rated load and 25 ambient.

AC leakage current: 0.25 mA max. at 240 Vac. Input.

3.2 Rechargeable Battery

Output Voltage8.4~6.0V Cut-off Voltage5.7~6.0V Charge voltageThe battery pack should be charged when the input voltage is from11V to 15V Chargera.) Hiteker DC12V/2.7A adaptor.

b.) Hiteker DC12V/2.7A adaptor and Portable DVD LED is in red color when the battery pack is in charging; and turns into green color when

batter pack is full. If the battery pack is in Full status, no matter use adaptor charge directly or link DVD to

charge again, the LED must be turn into green color in 15 min. The cycle life of battery pack has more than 300 cycles. Charge: The battery pack must be able to charge when used the Hiteker DC12V/2.7A adaptor or

Hiteker DC12V/2.7A adaptor and portable DVD (power off status). Discharge: Using the battery pack as the power source for portable DVD that in DVD disc

playing mode, the discharging time must be exceed 2.5hrs. 3.2.1 Electrical Protection The battery pack shall be capable of withstanding a continuous short circuit output without damage.

Page 15: Dpc-7400 Daewoo Dvd Portable Player

- 12 -

The battery pack shall return to normal operation only after the fault has been removed. A thermal fuse must be added on the surface of cell body to protect the battery pack. A polyswitch must be add to protect the battery pack. Charge & Play Time of Battery Pack

Charge Time (hr)

DVD Title Play Time (hr)

Styling

Ni-MH 2400mAh (6S1P)

4~5 2.5

For DPC-7400 Series

Page 16: Dpc-7400 Daewoo Dvd Portable Player

- 13 -

4 Dimension & Physical Characteristics

4.1 Outline Dimension

200mm(L) x 155mm(W) x 38mm(H)

4.2 Physical Characteristics

Page 17: Dpc-7400 Daewoo Dvd Portable Player

Drawn:

NO

- 14 -

4.3 Exploded View

Page 18: Dpc-7400 Daewoo Dvd Portable Player

- 15 -

5 Regulatory Standards

5.1 Safety

UL FDA

5.2 EMI

CE FCC

5.3 Ergonomics

Dolby

- 15 -

LVD

Page 19: Dpc-7400 Daewoo Dvd Portable Player

- 16 -

6 Service Tools and Equipment

6.1Service Tools and Equipment Table

Application Name

DVD Testing Disc General

General Tools screwdriver etc.

CD Testing Disc Confirm

VCD Testing Disc

Oscillograph

Probes

AV Cables

Adjust

TV Monitor

Searing-iron

Antistatic wrist strap

Grounding for electrostatic breakdown

Conductive material steel sheet

6.2 Storing and Handling Test Discs

It is important for a DVD testing disc keeping its surface precise. Please

care for storing and using it.

1. Do not place the disc on worktable directly after using.

2. Do not store discs in places subject to direct sunlight or near heat sources.

Page 20: Dpc-7400 Daewoo Dvd Portable Player

3. Do not place the disc on a glass surface. It may damage the disc. If this happened,

please use a new testing disc adjust DVD player precision.

6.3 Notes

PLEASE READ ALL NOTES GIVEN IN THIS MANUAL.

Locate

Place the unit on a firm, flat surface.

Do not place in a high temperature (upwards of 40 ) or high wet

(upwards of 80 percent) area.

Do not place in an area with a lot of dust.

Keep away from direct sunlight &domestic heating equipment.

Do not fall any objects into the unit.

Care should be taken so that liquids are not spilled into the unit openings.

Such situations could result in fire or electrical shock.

Keep the DVD video player away from any magnetic articles such as speaker etc.

Superposition

Please place the DVD player horizontally. Do not place a heavy object

(amplifier, receiver) on it. The object may fall, causing serious personal injury

- 17 -

Page 21: Dpc-7400 Daewoo Dvd Portable Player

- 18 -

or death.

This unit should be situated away from heat source, such as amplifiers, radiators,

stoves or any other units producing heat.

Condensation

Lens could be moistening in these cases.

Turn on heater shortly,

In a very wet room,

Move the player from a cold environment to a heat environment quickly.

Being moisture inside the play could operate normally. Please turn on power and

wait about an hour for drying the moisture.

Page 22: Dpc-7400 Daewoo Dvd Portable Player

- 19 -

7 Spare Parts

7.1 Key Parts List

Location Part NO Part Name Description Maker Remark

GKB2.855.8105MX MEPG Board Hiteker W/O DivX

GKB2.855.8138MX Main Board

MEPG Board(With DivX) Hiteker With DivX

U17 MT1389QE_D MTK1389D MTK W/O DivX

U11 ICMT1389DE-C MPEG IC

MTK1389C MTK With DivX

U11 AT49LV4096AT-70TC 4M Memory ATMEL W/O DivX

U14 ICMX26LV800BTC-70

FLASH Memory IC 8M Memory FUJITSU With DivX

U7 IC42S16100-7T SDRAM IC ISSI W/O DivX

U13 IS42S16400-7T SDRAM IC

SDRAM IC ISSI With DivX

U38 ICBA5954FP DRIVE IC ROHM W/O DivX

U12 ICBA5954FP

MOTOR DRIVE IC DRIVE IC ROHM With DivX

U12 IC24C02 EEPROM IC ATMEL W/O DivX

U15 IC24C02 EEPROM IC

EEPROM IC ATMEL With DivX

UM1/2 MP1580 DC TO DC MPS W/O DivX

U1/2 MP1580 Power Trans IC

DC TO DC MPS With DivX

U19 TPA6011 AUDIO Amplifier TI W/O DivX

U20 TPA6011 AUDIO Trans IC

AUDIO Amplifier TI With DivX

GKB4.021.8027MX Key PCB Function Key Part Hiteker For All

GKB2.930.8026MX High Voltage PCB High Voltage PCB TOP-STAR For All

GKB2.855.8042MX Drive PCB TFT LCD Driver Hiteker For All

U201 HX8806 TCON IC TCON IC HIMAX For All

U1 IR3Y29B VIDEO Decode IC VIDEO Decode IC SHARP For All

DM-520A Loader DVD Player Foryou For All

HOP-1200W Pick up Pick up HITACH For All

CCM03-030R1-49 Spindle Motor Spindle Motor Moretech For All

WFF-030PB-08315 Sled Motor Sled Motor WeiZhen For All

PW070XU3 TFT Screen TFT screen PVI For All

GKB4.819.8045MX Rechargeable Battery Ni-MH2400mAh Rebenergy For All

GKB2.930.8015 AC/DC Adapter DC 12V 2.7A SiDa For All

GKB2.018.8072WX Remote Control Remote Control FeiDa For All

Page 23: Dpc-7400 Daewoo Dvd Portable Player

- 20 -

8 Trouble Shooting

8.1 Error Code Table

CODE Descriptions of Error Note

Power Test

T01 No power no action

T02 Power Led indicator is not on or insufficient brightness

T03 Loading time too long

T04 Remote control bad sensing or not functional

T05 System stays in the Run In condition after power on, can’t be tested

T06 System down at power on

T07 System down during playing

T08 Power on unstable

T09 Abnormal sound in the system

Disc Drive Test

T11 Can’t read the disc (No Disc)

T12 Disc drive no action or locked

T13 Disc drive scratches the disc

T14 Some discs can’t be played (can’t play CD or VCD or DVD)

T15 Head does not work

T16 Spindle does not work

Video Test

T21 No video / abnormal (Please indicate the abnormal condition)

T22 Video: no video / abnormal (Please indicate the abnormal condition)

T23 S-Video No video / abnormal or black & white (Please indicate the abnormal condition)

T24 VCD picture abnormal (Please indicate the abnormal condition)

T25 DVD picture abnormal (Please indicate the abnormal condition)

T26 Picture subtitle display abnormal or no display

T27 Setting menu picture abnormal (Please indicate the abnormal condition)

Audio Test

T31 Audio / left sound channel (AOL) does not have waveform (sound) or waveform (sound) abnormal

T32 Audio / right sound channel (AOR) does not have waveform (sound) or waveform (sound) abnormal

Page 24: Dpc-7400 Daewoo Dvd Portable Player

- 21 -

T33 MP3 abnormal sound

T34 Audio no waveform (sound) or waveform (sound) abnormal

Earphone Test

T41 Earphone no sound or the sound has pause, abnormal sound, noise, echo

T42 Earphone (right) no sound or the sound has pause, abnormal sound, noise

T43 Earphone (left) no sound or the sound has pause, abnormal sound, noise

Function Key Test

T51 Video can’t be still or stop

T52 Can’t execute fast forward or rewind

T53 Panel button

System Setting Test

T61 Can’t enter the system setting

T62 The system can not be played or it is down after the system is set

TFT Test

T71 TFT image and color error

T72 TFT image is black and white

T73 TFT image shakes and is distorted

T74 TFT PAL color strip

6.2 Debug & Trouble Shooting

CB for any missing components and bad soldering T01No Power

Main Board A. Check for components on the Main Board to see if there are any short circuits.

B. Check for the power adapter to see if the 12v power is abnormal. C. Check for components C6,C7,CE100,C3 on the Main Board to see if there are

any short circuits.

D. Check for component CN1 on the Main Board to see if the switch have function. E. If none of the above actions is effective, please change Main Board.

T02Power LED indicator not on or insufficient brightness

Main Board A. Open the cover of the portable DVD-player to inspect if LED functions normally.

T75 TFT ripple

张国强
B. Measure the base electrode of Q1 to see if the voltage is high_and the emitter of
张国强
Q1 must be high voltage.Q1 is a NPN 3904 type transistor. If it is abnormal ,
Page 25: Dpc-7400 Daewoo Dvd Portable Player

- 22 -

Please replace with a good one.

D. Disassemble F/W, replace with a good one or re-plug it to see if the LED lights up when Power ON.

E. If the above actions are not working, replace the Main Board.

T03Loading time too long

Main Board A. Check the flat cable to see if it is adhibited to the right place. B. Remove the cover to see if the resistors or resistor-array adjacent to U38 and or

U17, to see if there is any cold soldering, hollow soldering, misplaced soldering,

or wrong part.

T04Remote control bad sensing or sensing not functional

Remote control

C. If the above actions are not working, replace the Main Board.

A. If the main body of the system works normally, then making sure that the

battery of the Remote control has sufficient power, if it is not, replace the battery. Main Board

A. Remove the top cover and the panel. Check to see if IR1 has short circuit, broken circuit, hollow soldering, or other problems. Also check if the pins 1 of IR1 have power.

B. If the above actions are not working, replace the Main Board. T05Stay in the Run In condition after power on, can’t be tested

Main Board A. The same refer to T03.

B. If the above actions are not working, replace the Main Board. T06System down at power on

Main Board A. Remove the top cover, check all flat cables in the system to see if they are correctly

plugged to the fixed positions, or re-plug them. B. Check the pin 1 of U3 to see if it is low voltage. If not , disassemble R5 or pull it to

low voltage with a lead.

C. If the above actions are not working, replace the Main Board. T07System down during play

Main Board A. Exclude the condition of using battry. (The system will down when the

voltage is too low.) B. Disassemble U17 F/W, replace with a good one or re-plug it to see if the

symptom will disappear.

Page 26: Dpc-7400 Daewoo Dvd Portable Player

- 23 -

C. Remove the top cover, check all flat cables in the system to see if they are

correctly plugged to the fixed positions, or re-plug them.

D. Check the capacitors C19 and the diode D6 to see if the reset circuit works normally.

E. If the above actions are not working, replace the Main Board. DVD ROM

A. Check the loader to see if it is not stable (any condition that some of the discs can’t be played). If so, replace the loader.

DVD DISC A. Check the Test Disc to see if there is any serious scratch or ring shape, circular

shape scratches, if so, replace the Test Disc and test again. T08Power on unstable

Main Board A. Remove the top cover, check all flat cables in the system to see if they are

correctly plugged to the fixed positions, or re-plug them. B. Check the LDO Q3 to see if it works normally with a 1.8V output voltage.

C. Check the reset circuit refer to the title T07-D.

D. If the above actions are not working, replace the Main Board. T09Abnormal sound in the machine base (Power on abnormal sound)

DVD ROM A. Check the loader to see if it is the source of the abnormal sound. If so, replace the loader.

B. If the abnormal sound comes from the audio speakers, check the audion PNP3906

T11Disc drive can’t read (NO DISC)

Main Board A. Remove the top cover, check the 28-pin flat cable in the system to see if they

are correctly plugged to the fixed positions, or re-plug them.

B. Check the resistors or resistor-array adjacent to U38 and U17 to see if there is

any hollow soldering or cold soldering.

type Q16 and NPN 3904 type Q8/9/10/12/13/15 to confirm the mute circuit works

normally. If not ,change the audion.

C. If the above actions are not working, replace the Main Board. If it is still not working, replace the loader.

DVD ROM A. Check the loader to see if it can’t read. If so, replace the loader.

T12Disc drive no action or locked

Main Board A. Remove the cover. Check to see if it is caused by mis-assembly. B. Check the resistors or capacitors adjacent to U38 to see if there is any hollow

soldering or cold soldering.

C. If the above actions are not working, replace the loader. If it is still not working,

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replace the main board. T13Disc drive scratches disc

Main Board

A. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow

soldering, cold soldering, wrong part, or misplaced soldering.

B. If the above actions are not working, replace the loader. If it is still not working,

replace the main board.

DVD ROM A. Check the loader to see if it is the cause of disc scratching. If so, replace the

loader. T14Not every disc can be played

Main Board

A. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow

soldering, cold soldering, wrong part, or misplaced soldering.

B. If the above actions are not working, replace the loader. If it is still not working, replace the main board.

T15Head does not work

Main Board A. Remove the top cover, check the 28-pin flat cable and the 2-pin cable in the

system to see if they are correctly plugged to the fixed positions, or re-plug them.

B. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow

soldering, cold soldering, wrong part, or misplaced soldering.

C. If the above actions are not working, replace the loader. If it is still not working,

replace the main board.

T16Spindle does not work.

Main Board A. Remove the top cover, check the 4-pin flat cable in the system to see if they

are correctly plugged to the fixed positions, or re-plug them.

B. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow

soldering, cold soldering, wrong part, or misplaced soldering.

C. If the above actions are not working, replace the loader. If it is still not working,

replace the main board.

T21no video / abnormal

Main Board A. Remove the top cover, check all flat cables in the system to see if they are

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correctly plugged to the fixed positions, or re-plug them.

B. Use oscilloscope to measure if Y1 generates 27MHz. If it does not generate

said frequency, and the problems such as cold or hollow soldering have been

ruled out, it maybe Y1 work abnormally . Replace Y1 with a 27MHz

fundamental frequency oscillater.

C. Check if U17(F/W) IC has any problem.

D. Check if switch for TFT on/off is normal; replace a new one if necessary. E. If the above actions are not working, replace the Main Board.

Driver Board

B. Adjust VR4,VR6,VR1,VR7,VR5 to the appropriate value.

A. Check VR6,VR4,VR1,VR7,VR5 is using the correct component. Also check if it’s damaged.

DVD ROM (less likely to happen) A. If it is useless to change the main board, then replace the loader.

T22Video no video / abnormal

Main Board A. Remove the cover. Check the main board to see if there is any cold or hollow

soldering and rule out the problem. B. Remove the top cover, check all flat cables in the system to see if they are

correctly plugged to the fixed positions, or re-plug them. C. Check RLC following CVBS to see if there is any wrong parts, cold and hollow

soldering, short circuit, broken circuit, broken parts and rule out the problem. D. If the above actions do not work, then check U17Pin175 and Pin182 to see if

there is CVBS signals.

E. If the above actions are not working, replace the Main Board.

T23S-Video no video / abnormal or black & white

Main Board A. Remove the cover. Check the main board to see if there is any cold or hollow

soldering and rule out the problem.

B. Remove the top cover, check all flat cables in the system to see if they are correctly plugged to the fixed positions, or re-plug them.

C. Check RLC following Y and C to see if there is any wrong parts, cold and hollow soldering, short circuit, broken circuit, broken parts and rule out the problem.

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D. If the above actions do not work, then check U17 Pin179 and Pin181 to see

if there is Y and C signals.

E. If the above actions are not working, replace the Main Board.

T24VCD abnormal picture

Main Board

A. Check main board to see if there is any cold or hollow soldering and short

circuit problem and rule out the problem. B. Check the resistors or capacitors components or those adjacent to IC to see

if there is any hollow soldering, cold soldering, wrong part, or misplaced soldering.

C. If the above actions are not working, replace the Main Board.

DVD ROM A. If the abnormal picture is the problem of pause or skipping tracks, then making

sure if the disc has any scratches or dirt, if no such problems then replace the loader.

T25DVD abnormal picture

Main Board

A. Check U17 to see if there is any cold or hollow soldering and short circuit

problem and rule out the problem. B. Check the resistors or capacitors components or those adjacent to IC to see

if there is any hollow soldering, cold soldering, wrong part, or misplaced soldering.

C. If the above actions are not working, replace the Main Board.

DVD ROM A. If the abnormal picture is the problem of pause or skipping tracks, then making

sure if the disc has any scratches or dirt, if no such problems then replace the loader.

T26Picture subtitle abnormal display or no display

Main Board A. Remove the top cover and dis-assemble F/W (U17). Replace it with a good

F/W or re-plug it, then check if the action is normal. Otherwise replace the F/W. B. Check U17 to see if there is any cold or hollow soldering and short circuit

problem and rule out the problem. C. If the above actions are not working, replace the Main Board.

T27Setting menu abnormal picture

Main Board A. Check U17 to see if there is any cold or hollow soldering and rule out the problem.

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B. Remove and dis-assemble U7 with a 16Mbit SDRAM.

C. If the above actions are not working, replace the Main Board. T31Audio /left channel (AOL) no sound or abnormal sound

Main Board A. Remove the cover. Check U15 on the Main board to see if there is any cold

soldering, hollow soldering, or damage. Rule out the problem. B. Check all parts following AOL to see if there is any cold or hollow soldering,

short circuit, broken circuit, parts missing, wrong parts and rule out the problem.

C. If the above actions are not working, replace the Main Board. T32Audio /right channel (AOR) no sound or abnormal sound

Main Board A. Remove the cover. Check U15 on the Main board to see if there is any cold

soldering, hollow soldering, or damage. Rule out the problem. B. Check all parts following AOR to see if there is any cold or hollow soldering,

short circuit, broken circuit, parts missing, wrong parts and rule out the problem.

C. If the above actions are not working, replace the Main Board. T33MP3 abnormal sound

Main Board A. Remove the top cover, check all flat cables in the system to see if they are

correctly plugged to the fixed positions, or re-plug them. B. Check the resistors or capacitors components on the main board, or those

adjacent to IC to see if there is any hollow soldering or cold soldering.

C. If the above actions are not working, replace the main board. If it is still not working, replace the loader.

T34Audio no waveform (sound) or waveform (sound) abnormal

Main Board A. Remove the cover. Check U15 on the main board to see if there is any cold

or hollow soldering and rule out the problem. B. Check all parts following AOL and AOR to see if there is any cold or hollow

soldering, short circuit, broken circuit, parts missing, or wrong parts. Rule out the problem.

C. If the above actions are not working, replace the Main Board. T41Earphone Audio no waveform (sound) or waveform (sound) abnormal

Main Board A. Remove the top cover, check all flat cables in the system to see if they are

correctly plugged to the fixed positions, or re-plug them.

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B. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering

and rule out the problem. C. If the above action does not work after the inspection, replace the main board.

T42Earphone Audio right no waveform (sound) or waveform (sound ) abnormal

Main Board A. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering

and rule out the problem. Especially check for C24,C26,C28.

B. If the above action does not work after the inspection, replace the main board. T43Earphone Audio left no waveform (sound) or waveform (sound) abnormal

Main Board A. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering

and rule out the problem.Especially check for C27,C36,C67. B. If the above action does not work after the inspection, replace the main board.

T51Video can’t be still or stopped

Remote control A. If the main body of the system works normally, then making sure that the

battery of the Remote control has sufficient power, if it is not, replace the battery.

Main Board A. Check to see if U17 is damaged, and check all parts following U17 to see

if there is any cold or hollow soldering, short circuit, broken circuit, broken

parts, parts missing and rule out the problem. B. Check to see whether U17 is damaged. C. If the above actions are not working, replace the Main Board.

T52Can’t execute fast forward or rewind

Main Board A. Check to see if U17 is damaged, and check all parts following U17 to see

if there is any cold or hollow soldering, short circuit, broken circuit, broken

parts, parts missing and rule out the problem. B. Check to see whether U17 is damaged. C. If the above actions do not work after the inspection, it means the main board or

F/W is bad. Replace the main board or re-burn the F/W (U11). T53Panel button

Main Board A. Check U17 and 11-pin plug in jack CON2 to see if there is any cold or hollow

soldering and reverse soldering of IC or parts missing.

B. If the above actions do not work after the inspection, check the 11pin cable to see if there is any damage.

C. If the above actions are not working, Replace the control board or the main board.

T61Can’t enter the system setting

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Main Board A. Check U17 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. B. If the above actions do not work after the inspection, it means the main board or

F/W is bad. C. If the disk is abnormal, ask for a new version software .

T62System can’t play or system down after setting

Main Board A. Check U17 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. B. If the above actions do not work after the inspection, it means the main board or

F/W is bad. Replace the main board or re-burn the F/W (U11). T71TFT image and color error

Main Board A. Check the 11-pin cable connected to the driver board to see if there is any

problem of plugging. Rule out the problem. B. Check devices after Y/C signal to see if there is any cold or hollow soldering

and reverse soldering of IC or parts missing. C. Check U17 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. D. If the above actions are not working, replace the Main Board.

Driver Board A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are

correct. B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. C. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. D. If the above actions are not working, replace the Driver Board.

T72TFT image is black and white

Main Board A. Check the 11-pin cable connected to the driver board to see if there is any

problem of plugging. Rule out the problem. B. Check devices after Y/C signal to see if there is any cold or hollow soldering

and reverse soldering of IC or parts missing. C. Check U17 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. D. If the above actions are not working, replace the Main Board.

Driver Board

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A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are

correct. B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow

soldering and reverse soldering of IC or parts missing. D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. E. If the above actions are not working, replace the Driver Board.

T73TFT image shakes or is distorted

Main Board A. Check the 11-pin cable connected to the driver board to see if there is any

problem of plugging. Rule out the problem. B. Check devices after Y/C signal to see if there is any cold or hollow soldering

and reverse soldering of IC or parts missing. C. Check U17 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. D. If the above actions are not working, replace the Main Board.

Driver Board A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are

correct. B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow

soldering and reverse soldering of IC or parts missing. D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. E. If the above actions are not working, replace the Driver Board.

T74TFT PAL color strip

Driver Board A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are

correct. B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering

of IC or parts missing. C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow

soldering and reverse soldering of IC or parts missing. D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering

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soldering of IC or parts missing. F. Check Pin 1 to Pin 16 on U202 for any cold or hollow soldering and reverse

soldering of IC or parts missing. G. If the above actions are not working, replace the Driver Board.

T75TFT ripple

Main Board A. Check the 13-pin cables connected to the driver board to see if there is any

problem of plugging. Rule out the problem. B. Check the 3-pin cable connected to the inverter board to see if there is any

problem of plugging. Rule out the problem. C. If the above actions are not working, replace the Main Board.

Driver Board A. Measure the voltage U1 to see if it is correct. B. Check the devices surrounding VR202 to see if there is any cold or hollow

soldering and reverse soldering of IC or parts missing.

C. If the above actions are not working, replace the Driver Board.

A. Check the 3-pin cable connected to the inverter board to see if there is any

problem of plugging. Rule out the problem.

B. Check the sharing cable connected to the panel to see if there is any problem

of plugging. Rule out the problem.

C. Check the high-voltage cable connected to the panel to see if there is any

Inverter Board

problem of plugging. Rule out the problem.

D. If the above actions are not working, replace the inverter board.