Akai LTA-15A301, LTV-1501 Schematic

15”LCD TV SERVICE MANUAL

LTA-15A301

DESIGNED BY:
CHECKED BY:
APPROVED BY:

VERSION:

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

POWER CONSUMPTION
TV RECEIVE SYSTEM

VIDEO SYSTEM
VISION INTERMEDIATE FREQUENCY

INTER-CARRIER FREQUENCY

CHROMA IF FREQUENCY

CHANNELS RECEIVED

TUNING MODE
AV IN/OUT

55Watt（ MAX.）

≤ 3Watt(STBY)
PAL D/K I B/G SECAM BG/DK/LL’
MULTI PAL/ SECAM/ NTSC

38.9MHz,33.95MHz(L’)

5.5 MHz (B/G)

6.0 MHz (I)

6.5 MHz (D/K,LL’)
BG/DK/L: 34.47MHz

L’: 38.38 MHz

VHF-L 46.25-163.25MHz
VHF-H 158.25-466.25MHz
UHF 471.25-855.25MHz
PLL SYSTEM

1 AV IN,1 S-VIDEO IN

21PIN SCART IN

AV IN/OUT SPECIFICATION

PC INPUT
ANTENNA INPUT IMPEDANCE
OSD LANGUAGE
AUDIO OUTPUT POWER

LED INDICATORS

HAND SET POWER SUPLY

Y/C IN -Y：1.0±0.2V

C:0.7 V

VIDEO IN----1.0 ±0.2V

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

AUDIO OUT----Approx,400mV

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

0.7 V

(analog RGB signal)

P-P

P-P

75Ω

P-P

P-P

P-P

75Ω

75Ω

75Ω

P-P

2.4-5V(HSYNC&VSYNC)

75 OHM

ENGLISH/SPAINISH/ITALIAN

RUSSIAN/GERMAN/FRENCH

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

GREEN POWER ON

RED POWER OFF

ORANGE SLEEP(PC)
BATTERY 1.5V （AAA）x2

PART2:PANEL

Brand & Model
Resolution
Displayable Colour
Viewing Angle (H/V)
Display Response Time
Contrast Ratio
Brightness
Aspect
Lamp Life
Bad Pixel Quality (Bright/Dark/Total)

CHIMEI/M150X3-L01
1024*768

16.2MHz
120° (Hor) / 100° (Ver)
30ms
1:300
250nit
4:3
50,000Hrs
2 / 3 /5

PART3:PC INPUT RESOLUTION

Recommended resolution is 1024*768@60Hz

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

1
2
3
4
5
6
7
8

9
10
11
12

720*400 70 31.47 28.322 -/+
640*350 70 31.469 25.175 +/­640*480 60 31.47 25.175 -/­640*480 72 37.86 31.5 -/­640*480 75 37.50 31.5 -/­800*600 56 35.156 36 +/+
800*600 60 37.88 40 +/+
800*600 75 46.88 49.5 +/+

800*600 72 48.08 50 +/+
1024*768 60 48.36 65 -/­1024*768 70 56.48 75 -/­1024*768 75 60.02 78.75 +/+

Band

Width(MHz)

Polarity

H/V

DESCRIPTION OF

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

REMOTE CONTROL DESCRIPTION

1

2

12

3

CH

6

7

13

16

14

5

15

17

11

10

19

4

9

8

18

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.

RM-612

15-LCD TV DIAGRAM

ANTENNA

TUNER

MAIN BOARD

CVBS

IIC1

VIDEO

S-VIDEO

U701 SAA7118H

VIDEO DECODER

SCART/YCbCr

R

FROM PC

G B

HSYNC

VSYNC

U201
74LV14

KEYBOARD

+12V

GND

U102
EEPROM

+5V

+12V

U101

IIC2

MCU

IC606

IC601
AP1501-50

+5V

+5V

+12V

IC401

IIC2

U802
SAA5264PS
/M3/0104

TELETEXT

IC 605

IC602

IC604

+9V

+3.3V

+3.3V

+3.3V

+3.3V

+3.3V

IIC1

U401

PT2314

AUDIO PROCESSOR

TV-AUDIO

+12V

U301

MV2

LCD DRIVER

+3.3v

+3.3v

U402

TDA7266D

AMP

ON/OFF

ON/OFFON/OFF

ON/OFF

BRI-ADJ

PANEL

+5V

AC
ADAPTER

+12V

SCART AUDIO

PC AUDIO

AUDIO FROM AV/S-VIDEO

INVERTER

54321

6

D

mcu
mcu.Sch

SCL

SDA

SCART

MCU_RESET

DDC_SCL
DDC_SDA
CABLE

C

VIDEO input
VIDEO input.Sch

EN_TV
SW

B

BOXRGBVOUT

STANDBY

MCU_MUTE

TUNER_SDA

TUNER_SCL

EN_TV

SW

CE

AUDIO_TV

HS

VS

TUNER_SCL

Y[0-7]

TUNER_SDA
UV[0-7]
VS_VID
HS_VID
DE_VID

CLK_VID

7118

IRQ

audio
audio.Sch

TUNER_SCL
TUNER_SDA
AUDIO_TV

scalar scalar.Sch

IRQ

GIN+

RGB-B[0-23]

RGB_A[0-23]

MCU_RESET

PA_HSYNC

GIN-

SDA

D_HSYNC
D_VSYNC

LVDS_PD

INV_EN
LCD_ON
BRI_ADJ

PA_VSYNC

SCL

D_DE
DCLK

SCL

SDA

Y[0-7]
UV[0-7]
VS_VID
HS_VID
DE_VID
CLK_VID
7118

RIN+

BIN+

RIN-

BIN-

output
output.Sch

RGB_B[0-23]
RGB_A[0-23]
D_HSYNC
D_VSYNC
D_DE
DCLK
LVDS_PD

LCDVDD

SCART

STANDBY

MCU_MUTE

ON/OFF

D

C

B

VGA input

CCD CCD.Sch

RGB

HS

VS

BOX

A

1 2 3 4 56

MCU_RESET

SDA
SCL

VOUT

VOUT

SDA
SCL
MCU_RESET

TeletextTeletext.sch

BGR

VS

HS

BOX

RIN-

GIN-

RIN+

GIN+

VGA input.Sch

BIN-

BIN+

PA_VSYNC

PA_HSYNC

DDC_SDA

CABLE

DDC_SCL

INV_EN

BRI_ADJ

LCD_ON

LCDVDD

power
power.Sch

STANDBY

ON/OFF

Title

Number RevisionSize

B

Date: 4-Jan-2005 Sheet of
File: E:\work\151720TV\1517-MRTTV100.ddb Drawn By:

A

54321

+5V

C111

+

C110

0.1uF

22uF/16V

SCL
SDA

R104

4K7

35

21

20

10
14
15

16
17

2
3
4
5
6
7
8
9

+5V

GMCU

123

/EA[VP]

X1

X2

RESET
INT0

INT1
T0
T1

P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7

SCART

678

4 5

INT2

1

12

RP101

4K7*4

44

INT3

GMCU

R117

VCC

VSS22P4.1

4K7

ALE/P

P4.0

23

34

+5V

10K

LEDO
LEDG

+5V

Q101

9015

R105

5.1K

IRQ

4
1
2
3
7

+5V

U102

VSS
A0
A1
A2
WP

24C16

REMOUT

+5V

8

SCL

SDA

VCC

R102

100K

6
5

D

R101

100K

D101

IN4148

R103

+

GMCU

GMCU

CN101

11
10

CON11

9
8
7
6
5
4
3
2
1

C113

0.1uF

C104

1uF

11
10
9
8
7
6
5
4
3
2
1

REMOUT

C101

10uF

C

B

GMCU

C109

22pF

R124
R127

+5V

C107

22pF

X101

12MHz

R106

1M

C108

22pF

R132

1K

V­V+
DOWN
UP
MENU
POWER

R12533R126

33

33

33

R115

4K7

R116

4K7

SCL
SDA

P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7

/RD

/WR

PSEN

TXD

RXD

R118

4K7

R?

8051

R107

R108

4K7

4K7

4K7

43
42
41
40
39
38
37
36

24
25

R131

26

R133

27

R113

28
29
30

STANDBY

31

19
18
32
33
13
11

R109

R112

R111

R110

C105

1uF

C106

1uF

+5V

GMCU

R120

100

Q102

9014

Q103

9014

R121

100

R122

1K

R123

1K

4K7

4K7

4K7

ORANGE
GREEN

CABLE

EN_TV

R134

TUNER_SDA

33

TUNER_SCL

33

R135

R136
R137

47
4K7
0

33

33

MCU_MUTE

SW

DDC_SCL
DDC_SDA

MCU_RESET

DDC_SCL
DDC_SDA

R119

ORANGE

GREEN

SW1

2K7

R130

2K7

SW1

Q105

R141

15K

R142
10K

9014

GMCU

R140

10K

+5V

CN102

POWER

MENU
UP
DOWN
V+
V-

DDC_SCL
DDC_SDA
SDA
SCL

R128
R129

33

33

GMCU

1
2
3
4
5
6

CON6

C112

0.1uF

C114

0.1uF

6

D

LEDO

C

LEDG

B

C118

C119

C116

C117

A

GMCU

1 2 3 4 56

0.1uF

C115

0.1uF

GMCU

0.1uF

0.1uF

0.1uF

0.1uF

C120

Title

Number RevisionSize

B

Date: 4-Jan-2005 Sheet of
File: E:\work\151720TV\1517-MRTTV100.ddb Drawn By:

A

54321

6

D

C912

0.1uF

C913

6.8nF

R908

2.2K
R909

2.2K
R910

R911

C901

NC
C902

NC
C903

NC
C904

68pF

2.2K

3.9K
C914

68nF

MCU_RESET

R914
20K

+5V2

C644

47uF/16V

C915NCC916

NC

C917

1uF

SEN

VOUT

C

HS
VS
SDA
SCL

B

R902 100
R901

100

FB901

112

FB

+

R913

4K7

R903

10K

22uF/16V

2

+C910

C911

0.1uF

U901

7

VIDEO

5

HS_IN

13

VS_IN

14

SDA

15

SCL

4

SEN

10

RREF

6

SMS

1

VSS

11

VSSA

VDD
SDO

RED

GREEN

BLUE

BOX

CSYNC

LPF

Z86229

12
16

R905

18

13K
R906

2

13K
R907

3

17
8
9

13K

R904

2.7K

R912

6.8K

R

G

B

BOX

+5V2

R915

4.7K

D

C

SEN

Q901

9014

B

COMPONENTS IN THIS PAGE ARE NOT USED

A

1 2 3 4 56

Title

Number RevisionSize

B

Date: 4-Jan-2005 Sheet of
File: E:\work\151720TV\1517-MRTTV100.ddb Drawn By:

A

RGB_A[0-23]

N

54321

6

V33

U501

1

VCC

2

TXIN5

3

TXIN6

4

TXIN7

5

GND

6

TXIN8

7

TXIN9

8

TXIN10
VCC
TXIN11
TXIN12
TXIN13
GND
TXIN14
TXIN15
TXIN16
R_FB
TXIN17
TXIN18
TXIN19
GND
TXIN20
TXIN21
TXIN22
TXIN23
VCC
TXIN24
TXIN25

LVDSGND

TXOUT0+

TXOUT1+
LVDSVCC
LVDSGND

TXOUT2+

TXCLKOUT­TXCLKOUT+

TX_OUT3-

TX_OUT3+

LVDS_GND

PLL_GND

PLL_VCC

PLL_GND

PWR_DWN

TXCLKIN

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

DS90C383

D_HSYNC
D_VSYNC

D_DE
DCLK
LVDS_PD

RGB_A7
RGB_A5
RGB_A8

RGB_A9
RGB_A10
RGB_A14

RGB_A15
RGB_A11
RGB_A12

RGB_A13
RGB_A16
RGB_A22

RGB_A23
RGB_A17
RGB_A18

RGB_A19
RGB_A20
RGB_A21

D_HSYNC
D_VSYNC

D_DE
DCLK
LVDS_PD

D

C

TXIN4
TXIN3
TXIN2

GND
TXIN1
TXIN0

TXIN27

TXOUT0­TXOUT1-

TXOUT2-

TXIN26

GND

56

RGB_A4
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29

RGB_A3

RGB_A2

RGB_A1

RGB_A0

RGB_A6

C503

RXE0­RXE0+
RXE1­RXE1+

RXE2­RXE2+
RXEC­RXEC+
RXE3­RXE3+

L501
221A

VDD_LV

0.1uF

VDD_LP

100uF/16V

RGB_B[0-23]

V33

U502

1
RGB_B7
RGB_B5

B

A

RGB_B8

RGB_B9
RGB_B10
RGB_B14

RGB_B15
RGB_B11
RGB_B12

RGB_B13
RGB_B16
RGB_B22

RGB_B23
RGB_B17
RGB_B18

RGB_B19
RGB_B20
RGB_B21

D_HSYNC
D_VSYNC

D_DE
DCLK
LVDS_PD

VCC

2

TXIN5

3

TXIN6

4

TXIN7

5

GND

6

TXIN8

7

TXIN9

8

TXIN10
VCC
TXIN11
TXIN12
TXIN13
GND
TXIN14
TXIN15
TXIN16
R_FB
TXIN17
TXIN18
TXIN19
GND
TXIN20
TXIN21
TXIN22
TXIN23
VCC
TXIN24
TXIN25

LVDSGND

TXOUT0+

TXOUT1+
LVDSVCC
LVDSGND

TXOUT2+

TXCLKOUT­TXCLKOUT+

TX_OUT3-

TX_OUT3+

LVDS_GND

PLL_GND

PLL_VCC

PLL_GND

PWR_DWN

TXCLKIN

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

DS90C383

TXIN4
TXIN3
TXIN2

GND
TXIN1
TXIN0

TXIN27

TXOUT0­TXOUT1-

TXOUT2-

TXIN26

GND

56

RGB_B4

55

RGB_B3

54

RGB_B2
53
52

RGB_B1
51

RGB_B0
50

RGB_B6
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29

C504

RXO0­RXO0+
RXO1­RXO1+

RXO2­RXO2+
RXOC­RXOC+
RXO3­RXO3+

0.1uF

221A

L502

C507

100uF/16V

+

1 2 3 4 56

V33

C501

C502

0.1uF

0.1uF

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

RGB_A4

RGB_A3

RGB_A2

RGB_A6

RGB_B7

RGB_B5

RGB_B10

RGB_B14

RGB_B15

RGB_B13

RGB_A21

RGB_A20

1

RGB_A7

100PF

2

RGB_A5

100PF

3

+C508

100PF

4
100PF

5
100PF
6

100PF
7
100PF
8
100PF
9

100PF

10

100PF

11

100PF

12

RGB_A19

100PF

RGB_A10

RGB_A14

RGB_A15

RGB_A11

RGB_A12

RGB_A13

RGB_A22

RGB_A23

RGB_A18

DGND

C506

C505

0.1uF

0.1uF

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,THERE ARE NO U501 AND U502

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

RGB_B4

RGB_B3

RGB_B2

RGB_B6

RGB_B11

RGB_B12

RGB_B21

RGB_B20

RGB_B19

RGB_B18

RGB_B23

RGB_B22

LCDVDD

CN501
CON30

1234567891011121314151617181920212223242526272829

LCDVDD

LCDVDD

DCLK

D_DE

D_VSYNC

D_HSYNC

RGB_B7
RGB_B6
RGB_B5
RGB_B4

RGB_B3
RGB_B2

RGB_B15
RGB_B14
RGB_B13
RGB_B12

RGB_B11
RGB_B10

RGB_B23
RGB_B22
RGB_B21
RGB_B20

RGB_B19
RGB_B18

RXO0-

CN502

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

45*1

RXO1-

RXO0+
R501

R502
R503 0

RXO1+

RXO2+

RXO2­0

0

RXOC+

RXOC-

RXO3+

RXO3-

RXE0-

RGB_A7
RGB_A6
RGB_A5
RGB_A4

RGB_A3
RGB_A2

RGB_A15
RGB_A14
RGB_A13
RGB_A12

RGB_A11
RGB_A10

RGB_A23
RGB_A22
RGB_A21
RGB_A20

RGB_A19
RGB_A18

RXE1-

RXE0+

RXE1+

CN503

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

30*1

RXE2-

RXEC-

RXE2+

RXE3-

RXEC+

RXE3+

30

D

C

B

DGND

A

Title

Number RevisionSize

B

Date: 25-Jan-2005 Sheet of
File: E:\work\151720TV\1517-MRTTV100.ddb Drawn By: