KXD LTA-15A301 Service Manual

15”LCD TV SERVICE MANUAL

LTA-15A301

VERSION:
DESIGNED BY:
CHECKED BY:
APPROVED BY:

CONTENTS

SPECIFICATION----------------------------------------------------------3-5
REMOTE CONTROLLER-----------------------------------------------6
EXPLODED VIEW DIAGRAM-----------------------------------------7-10
BOLCK DIAGRAM--------------------------------------------------------11
MAIN BOARD CIRCUIT-------------------------------------------------12-21
TUNER CIRCUIT----------------------------------------------------------22
INVERTER CIRCUIT-----------------------------------------------------23
ADAPTER CIRCUIT------------------------------------------------------24
COMPONENT DIAGRAM----------------------------------------------25-33
BILL OF MATERIAL-----------------------------------------------------34-58

KXD 15”LCD TV SPECIFICATION

FEATURES

●POWER SUPPLY:DC 12V/4A(ADAPTER)
ADAPTER POWER SUPPLY:AC 100∽240V 50/60Hz

●MULTI TV SYSTEM:PAL BG/DK/I and SECAM BG/DK/LL’

●MULTI VEDEO SYSTEM:PAL/NTSC/SECAM

●VERSATILE INPUT SOURCES:TV,VIDEO,S-VIDEO,SCART,

PC(ANALOG)

●FULL FUNCTION REMOTE CONTROLLER

●EXCELLENT SOUND EFFECT WITH VOLUME,TRABLE,BASS,

BALANCE, ADJUSTABLE

●SMART SOUND & PICTURE MODE SET:
STANDARD,SPEECH,MUSIC;STANDARD,SOFT,RICH

●ADAPTIVE 2/4 LINE COMB FILTER FOR PAL/NTSC

●VTR FOR WEAK AND DISTORETED SIGNAL FROM VIDEO TAPE

RECORDER

●10 PAGES TELETEXT(OPTION)

●AUTOMATICALLY TURN OFF THE SET WHEN SIGNAL ABSENT LONGER

THAN 10 MINUTES

●256 CHANNELS

●BLUE SCREEN DISPLAY

GENERAL SPECIFICATION:
PART1:TV SET

55Watt（ MAX.）

POWER CONSUMPTION

≤ 3Watt(STBY)

TV RECEIVE SYSTEM

PAL D/K I B/G SECAM BG/DK/LL’

VIDEO SYSTEM

MULTI PAL/ SECAM/ NTSC

VISION INTERMEDIATE FREQUENCY

38.9MHz,33.95MHz(L’)

5.5 MHz (B/G)

6.0 MHz (I)

INTER-CARRIER FREQUENCY

6.5 MHz (D/K,LL’)
BG/DK/L: 34.47MHz

CHROMA IF FREQUENCY

L’: 38.38 MHz

VHF-L 46.25-163.25MHz
VHF-H 158.25-466.25MHz

CHANNELS RECEIVED

UHF 471.25-855.25MHz

TUNING MODE

PLL SYSTEM

1 AV IN,1 S-VIDEO IN

AV IN/OUT

21PIN SCART IN

Y/C IN -Y：1.0±0.2V

P-P

75Ω

C:0.7 V

P-P

75Ω

VIDEO IN----1.0 ±0.2V

P-P

75Ω

AUDIO IN----Approx,500mV
VIDEO OUT----1.0±0.2 V

P-P

75Ω

AUDIO OUT----Approx,400mV

AV IN/OUT SPECIFICATION

RGB IN ---------0.7 V

P-P

0.7 V

P-P

(analog RGB signal)

PC INPUT

2.4-5V(HSYNC&VSYNC)

ANTENNA INPUT IMPEDANCE

75 OHM

ENGLISH/SPAINISH/ITALIAN

OSD LANGUAGE

RUSSIAN/GERMAN/FRENCH

AUDIO OUTPUT POWER

> 3W (1KHz, 0.5Vrms, 10%THD)

GREEN POWER ON

RED POWER OFF

LED INDICATORS

ORANGE SLEEP(PC)

HAND SET POWER SUPLY

BATTERY 1.5V （AAA）x2

PART2:PANEL

Brand & Model

CHIMEI/M150X3-L01

Resolution

1024*768

Displayable Colour

16.2MHz

Viewing Angle (H/V)

120° (Hor) / 100° (Ver)

Display Response Time

30ms

Contrast Ratio

1:300

Brightness

250nit

Aspect

4:3

Lamp Life

50,000Hrs

Bad Pixel Quality (Bright/Dark/Total)

2 / 3 /5

PART3:PC INPUT RESOLUTION

Recommended resolution is 1024*768@60Hz

RESOLUTION V.Freq(Hz) H.Freq(KHz)

Band

Width(MHz)

Polarity

H/V

1

720*400 70 31.47 28.322 -/+

2

640*350 70 31.469 25.175 +/-

3

640*480 60 31.47 25.175 -/-

4

640*480 72 37.86 31.5 -/-

5

640*480 75 37.50 31.5 -/-

6

800*600 56 35.156 36 +/+

7

800*600 60 37.88 40 +/+

8

800*600 75 46.88 49.5 +/+

9

800*600 72 48.08 50 +/+

10

1024*768 60 48.36 65 -/-

11

1024*768 70 56.48 75 -/-

12

1024*768 75 60.02 78.75 +/+

REMOTE CONTROL DESCRIPTION

DESCRIPTION OF

RM-612

17

14

15

16

13

9

5

8

7

6

10

4

3

12

2

1

11

18

19

1.POWER:turn on or off the TV

2.NUMBER KEYS

3.VOL+/- :adjust volume

4.CH+/- :change program forward/backward

5.MENU: access main menu

6.BOTONES / : move cursor in main menu

7.BOTONES / : adjust item you selected

8.REVEAL: recall program number, system etc on
the screen

9.Q VIEW: return to the last viewed program

10.SOURCE: select external video source

11. MUTE: mute sound

12.SLEEP: set time to turn off the TV

13.TEXT:display/mix/close teletext signal

14.HOLD: hold/release sub-page

15.SUB PAGE: view sub-page

16.INDEX: view index page directly.

17.4 COLOR BOTTONS:
access the corresponding page indicated in the
line of teletext page

18.VTR: rectify distoration signal from

VTR(videotape recorder).
19:AUTO: auto adust the position and size of the
picture in PC mode

DIRECT PROGRAM SELECTION (0-9 BUTTONS)

1.To select one-digit channel:
Press 0-9 digit buttons and wait for 2 seconds. For example,you need
channel 5, please input"5"button and the screen displays "5", the TV set
goes to channel 5 in 3 seconds.

2.To select two-digit channel:
Press two digit buttons in order to input the channel number.For example,
you need channel 10, please input "1" button, followed "0" button and the
set goes to channel 10. Be sure that the second press should be within 2
seconds.

3.To select three-digit channel:
Press three digit buttons in order to input the channel number. For
example, you need channel 110, please input "1" Button firstly, followed
"1" button secondly and followed 0 button thirdly then the set goes to
channel 110. Be sure that the second press should be within 2 seconds.

CH

AC
ADAPTER

+12V

IC601
AP1501-50

IC 605

GND

+5V

+3.3V

IC602

IC604

+3.3V

+3.3V

MCU

U101

IC606

+12V

+5V

KEYBOARD

U102
EEPROM

+5V

U701 SAA7118H

VIDEO DECODER

VIDEO

S-VIDEO

SCART/YCbCr

TUNER

IIC2

IIC1

CVBS

U802
SAA5264PS
/M3/0104

TELETEXT

IIC2

+3.3V

+3.3V

IC401

+12V

+9V

U401

PT2314

AUDIO PROCESSOR

U402

AMP

+12V

AUDIO FROM AV/S-VIDEO

PC AUDIO

SCART AUDIO

+3.3v

+3.3v

U301

MV2

LCD DRIVER

PANEL

+5V

U201
74LV14

HSYNC

VSYNC

R

G B

FROM PC

INVERTER

+12V

ON/OFF

MAIN BOARD

TDA7266D

ANTENNA

BRI-ADJ

ON/OFFON/OFF

ON/OFF

15-LCD TV DIAGRAM

IIC1

TV-AUDIO

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MCU_RESET

IRQ

SCL

SDA
DDC_SCL
DDC_SDA
CABLE

MCU_MUTE

EN_TV

TUNER_SDA

TUNER_SCL

SW

STANDBY

SCART

mcu
mcu.Sch

RGB

BOX

HS

VS

SDA
SCL

VOUT

MCU_RESET

CCD CCD.Sch

RGB_A[0-23]
D_HSYNC
D_VSYNC
D_DE
DCLK
LVDS_PD

RGB_B[0-23]

LCDVDD

output
output.Sch

INV_EN

BRI_ADJ

LCD_ON

LCDVDD

STANDBY

ON/OFF

power
power.Sch

Y[0-7]
UV[0-7]

CLK_VID

DE_VID

HS_VID

VS_VID

PA_VSYNC

PA_HSYNC

RIN+

GIN+

BIN+

RIN-

GIN-

BIN-

IRQ

SCL

SDA

MCU_RESET

BRI_ADJ

LVDS_PD

INV_EN

RGB_A[0-23]

RGB-B[0-23]

D_HSYNC

DCLK

D_VSYNC

D_DE

7118

LCD_ON

scalar scalar.Sch

VS

HS

SDA
SCL

BGR

BOX

VOUT

MCU_RESET

TeletextTeletext.sch

RIN+

GIN+

BIN+

PA_VSYNC

PA_HSYNC

DDC_SCL

DDC_SDA

CABLE

RIN-

GIN-

BIN-

VGA input
VGA input.Sch

CLK_VID

DE_VID

HS_VID

VS_VID

Y[0-7]

UV[0-7]

SCL

SDA

TUNER_SCL

TUNER_SDA

AUDIO_TV

CE

HS

VS

BOXRGBVOUT

EN_TV

7118

SW

VIDEO input
VIDEO input.Sch

TUNER_SCL
TUNER_SDA
AUDIO_TV

ON/OFF

MCU_MUTE

STANDBY

SCART

audio
audio.Sch

1 2 3 4 56

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R106

1M

X101

12MHz

C107

22pF

C108

22pF

MCU_RESET

IRQ

V­V+
DOWN
UP
MENU
POWER

VSS

4

A0

1

A1

2

A2

3

WP

7

SCL

6

SDA

5

VCC

8

U102

24C16

C113

0.1uF

R124

33

R127

33

R12533R126

33

R115

4K7

R116

4K7

SCL
SDA

DDC_SCL
DDC_SDA

CABLE

ORANGE
GREEN

R110

4K7

R112

4K7

+5V

R104

4K7

C111

0.1uF

Q103

9014

R119

2K7

Q102

9014

R120

100

R121

100

+5V

R122

1K

R123

1K

ORANGE

GREEN

LEDO

LEDG

123

4 5

678

RP101

4K7*4

POWER

MENU
UP
DOWN

+5V

C115

0.1uF

C116

0.1uF

C117

0.1uF

C118

0.1uF

C119

0.1uF

C120

0.1uF

1
2
3
4
5
6

CN102

CON6

+5V

SCL

SDA

DDC_SCL
DDC_SDA

DDC_SCL
DDC_SDA

SCL
SDA

GMCU

GMCU

GMCU

GMCU

GMCU

GMCU

GMCU

GMCU

V+
V-

LEDO
LEDG

C112

0.1uF

C114

0.1uF

C105

1uF

C106

1uF

R108

4K7

+

C110

22uF/16V

R105

5.1K

+5V

GMCU

Q101

9015

R103

10K

C104

1uF

R101

100K

+

C101

10uF

MCU_MUTE

R107

4K7

EN_TV

R117

4K7

R118

4K7

R130

2K7

R128

33

R129

33

R102

100K

C109

22pF

GMCU

+5V

REMOUT

REMOUT

+5V

TUNER_SDA

TUNER_SCL

R109

4K7

R111

4K7

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

CN101

CON11

SW

D101

IN4148

R113

0

+5V

+5V

R132

1K

R131

47

R133

4K7

R134

33

R135

33

R136

33

R137

33

STANDBY

R140
10K

R141

15K

Q105

9014

R142
10K

SW1

SW1

SCART

INT2

1

P1.0

2

P1.1

3

P1.2

4

P1.3

5

P1.4

6

P1.5

7

P1.6

8

P1.7

9

RESET

10

RXD

11

INT3

12

TXD

13

INT0

14

INT1

15

T0

16

T1

17

/WR

18

/RD

19

X2

20

X1

21

VSS22P4.1

23

P2.0

24

P2.1

25

P2.2

26

P2.3

27

P2.4

28

P2.5

29

P2.6

30

P2.7

31

PSEN

32

ALE/P

33

P4.0

34

/EA[VP]

35

P0.7

36

P0.6

37

P0.5

38

P0.4

39

P0.3

40

P0.2

41

P0.1

42

P0.0

43

VCC

44

R?

8051

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VIDEO

7

HS_IN

5

VS_IN

13

SDA

14

SCL

15

SEN

4

RREF

10

SMS

6

VSS

1

VSSA

11

VDD

12

SDO

16

RED

18

GREEN

2

BLUE

3

BOX

17

CSYNC

8

LPF

9

U901

Z86229

R903

10K

R912

6.8K

R904

2.7K

R907

13K

R906
13K

R905
13K

R908

2.2K
R909

2.2K
R910

2.2K

R911

3.9K

C911

0.1uF

C901

NC
C902

NC
C903

NC
C904

68pF

C912

0.1uF

C914

68nF

C913

6.8nF

R

G

B

BOX

+5V2

HS
VS

R902 100

R901

100

SDA
SCL

VOUT

112

2

FB901

FB

C915NCC916

NC

+C910

22uF/16V

R913

4K7

Q901

9014

R914
20K

R915

4.7K

+5V2

SEN

SEN

MCU_RESET

C917

1uF

+

C644

47uF/16V

COMPONENTS IN THIS PAGE ARE NOT USED

1 2 3 4 56

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VCC

1

TXIN5

2

TXIN6

3

TXIN7

4

GND

5

TXIN8

6

TXIN9

7

TXIN10

8

VCC

9

TXIN11

10

TXIN12

11

TXIN13

12

GND

13

TXIN14

14

TXIN15

15

TXIN16

16

R_FB

17

TXIN17

18

TXIN18

19

TXIN19

20

GND

21

TXIN20

22

TXIN21

23

TXIN22

24

TXIN23

25

VCC

26

TXIN24

27

TXIN2528GND

29

TXIN26

30

TXCLKIN

31

PWR_DWN

32

PLL_GND

33

PLL_VCC

34

PLL_GND

35

LVDS_GND

36

TX_OUT3+

37

TX_OUT3-

38

TXCLKOUT+

39

TXCLKOUT-

40

TXOUT2+

41

TXOUT2-

42

LVDSGND

43

LVDSVCC

44

TXOUT1+

45

TXOUT1-

46

TXOUT0+

47

TXOUT0-

48

LVDSGND

49

TXIN27

50

TXIN0

51

TXIN1

52

GND

53

TXIN2

54

TXIN3

55

TXIN4

56

U501

DS90C383

RGB_A[0-23]

V33

RGB_A7
RGB_A5
RGB_A8

RGB_A9
RGB_A10
RGB_A14

RGB_A15
RGB_A12

RGB_A11

RGB_A13
RGB_A16
RGB_A22

RGB_A23
RGB_A17
RGB_A18

RGB_A19
RGB_A20
RGB_A21

RGB_A4
RGB_A2

RGB_A3

RGB_A0

RGB_A1
RGB_A6

RXE0­RXE0+
RXE1­RXE1+

RXE2­RXE2+
RXEC­RXEC+
RXE3­RXE3+

D_HSYNC
D_VSYNC

D_DE
DCLK
LVDS_PD

C506

0.1uF

L501
221A

C503

0.1uF

VCC

1

TXIN5

2

TXIN6

3

TXIN7

4

GND

5

TXIN8

6

TXIN9

7

TXIN10

8

VCC

9

TXIN11

10

TXIN12

11

TXIN13

12

GND

13

TXIN14

14

TXIN15

15

TXIN16

16

R_FB

17

TXIN17

18

TXIN18

19

TXIN19

20

GND

21

TXIN20

22

TXIN21

23

TXIN22

24

TXIN23

25

VCC

26

TXIN24

27

TXIN2528GND

29

TXIN26

30

TXCLKIN

31

PWR_DWN

32

PLL_GND

33

PLL_VCC

34

PLL_GND

35

LVDS_GND

36

TX_OUT3+

37

TX_OUT3-

38

TXCLKOUT+

39

TXCLKOUT-

40

TXOUT2+

41

TXOUT2-

42

LVDSGND

43

LVDSVCC

44

TXOUT1+

45

TXOUT1-

46

TXOUT0+

47

TXOUT0-

48

LVDSGND

49

TXIN27

50

TXIN0

51

TXIN1

52

GND

53

TXIN2

54

TXIN3

55

TXIN4

56

U502

DS90C383

RGB_B[0-23]

V33

RGB_B7
RGB_B5
RGB_B8

RGB_B9
RGB_B10
RGB_B14

RGB_B15
RGB_B12

RGB_B11

RGB_B13
RGB_B16
RGB_B22

RGB_B23
RGB_B17
RGB_B18

RGB_B19
RGB_B20
RGB_B21

RGB_B4

RGB_B2

RGB_B3

RGB_B0

RGB_B1
RGB_B6

RXO0­RXO0+
RXO1­RXO1+

RXO2­RXO2+
RXOC­RXOC+
RXO3­RXO3+

C505

0.1uF

L502

221A

C504

0.1uF

D_HSYNC

D_HSYNC
D_VSYNC

D_VSYNC

D_DE

D_DE

DCLK

DCLK

LVDS_PD

LVDS_PD

1234567891011121314151617181920212223242526272829

30

CN501
CON30

RXO3+

RXO3-

RXOC+

RXOC-

RXO2+

RXO2-

RXO1+

RXO1-

RXO0+

RXO0-

RXE3+

RXE3-

RXEC+

RXEC-

RXE2+

RXE2-

RXE1+

RXE1-

RXE0+

RXE0-

C501

0.1uF

C502

0.1uF

V33

LCDVDD

VDD_LV

VDD_LP

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

CN502

45*1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

CN503

30*1

RGB_B18

RGB_B19

RGB_B20

RGB_B21

RGB_B22

RGB_B23

RGB_B10

RGB_B11

RGB_B12

RGB_B13

RGB_B14

RGB_B15

RGB_B2

RGB_B3

RGB_B4

RGB_B5

RGB_B6

RGB_B7

DCLK

D_DE

D_VSYNC

D_HSYNC

RGB_A18

RGB_A19

RGB_A20

RGB_A21

RGB_A22

RGB_A23

RGB_A10

RGB_A11

RGB_A12

RGB_A13

RGB_A14

RGB_A15

RGB_A2

RGB_A3

RGB_A4

RGB_A5

RGB_A6

RGB_A7

DGND

LCDVDD

LCDVDD

1

100PF

2
100PF

3
100PF

4

100PF
5
100PF

6

100PF
7
100PF
8
100PF
9
100PF

10

100PF

11

100PF

12

100PF

DGND

13
100PF

14
100PF

15

100PF
16
100PF

17

100PF
18

100PF
19
100PF

20
100PF
21

100PF

22
100PF

23

100PF

24

100PF

DGND

25
100PF
26

100PF

27

100PF

28

100PF
29
100PF

30

100PF
31
100PF
32
100PF
33
100PF

34

100PF

35

100PF
36

100PF

DGND

RGB_A7

RGB_A5

RGB_A10

RGB_A14

RGB_A15

RGB_A12

RGB_A11

RGB_A13

RGB_A22

RGB_A23

RGB_A18

RGB_A19

RGB_A20

RGB_A21

RGB_A4

RGB_A2

RGB_A3

RGB_A6

RGB_B7

RGB_B5

RGB_B10

RGB_B14

RGB_B15

RGB_B12

RGB_B11

RGB_B13

RGB_B22

RGB_B23

RGB_B18

RGB_B19

RGB_B20

RGB_B21

RGB_B4

RGB_B2

RGB_B3

RGB_B6

+C508

100uF/16V

+

C507

100uF/16V

R501

0

R502

0

R503 0

N

OTES:
1, USING 15 INCH AU'S PANEL,THERE ARE NO U501 AND U502.
2, USING 17 INCH PANELS,U501 AND U502 ARE EXIST.
3, USING 20 INCH PANELS,THE RE ARE NO U501 AND U502