Akai ATF-505 User manual

SERVICE MANUAL

Model:

ATF505

COLOR TV SET

www.akai.ru

AKAI AFT-505 (5” TFT LCD COLOR TV) Service Manual Page 1 of 5

1、Fault Description：Showing Picture On Screen But No Sound

Confirm the volume isn’t in silent mode before check.

YES

NO YES

YES

SEY

YES

Check IC U8 (5) plug has

audio output or not

Check IC U8 has 12V

power supply

Check IC U8 (3)

plug has audio signal

input or not

Check IC U8 and

circumjacent circuitry

Check IC U7 (51) plug

has audio signal

output or not

Check power

supply circuitry

Check jack CN5 has

audio signal or not

Start

Check R105 and C121

Check IC U7, the part of

accompaniment way and

circumjacent circuitry

Jack J5

damaged

Speaker

damaged

AKAI AFT-505 (5” TFT LCD COLOR TV) Service Manual Page 2 of 5

2、Fault Description: No Remote Control

Yes

Check the battery of remote

control is full of power or not

and remote control has been

damaged or not

Replace the battery and

repair the remote control

Is it away from TV

too far

Narrow the distance

Check the receiver (3) plug of

remote control has 5V power supply

Check power supply circuitry

Check receiver (2) plug of

remote control has been

earthed correctly or not

Earth

Check the receiver (1)

plug of remote control

has signal output

Receiver damaged

Check IC U2 (24) has signal

input or not and around

applicative circuitry

Start

AKAI AFT-505 (5” TFT LCD COLOR TV) Service Manual Page 3 of 5

3、Fault Description: No Color

YES

SEY

Received signal is too

weak to work

Check the image and accompaniment system

is it chose correctly and the color is it kept

off.

Readjust image and

accompaniment system.

Check IC U7 (34) plug has

4.433619MHz frequency

working in normal.

Check crystal Z1 and

capacitance C74

Check IC U7 and related

around applicative circuitry

Star

Under NTSC system, check IC

U7 has 3.58MHz frequency

working in normal.

AKAI AFT-505 (5” TFT LCD COLOR TV) Service Manual Page 4 of 5

4、Fault Description: Have Sound But Have No Picture

YES

OK NO

YES ON

YES

YES NO

YES

Check the power

Check whether the illuminant against

the background is shine in normal.

Check the power of

the illuminant against

the background.

Check whether AV & TV

is normally chose.

Reset the AV &

TV condition

Check whether each button

work in normal and show

OSD on screen.

Check whether IC U7 (3),

(4), (12), (13), (39), (40),

(42) plugs all work in

normal.

Check whether IC U7 (14),

(15), (16) plugs all have RGB

signal output

Check power

supply circuitry

Check IC U7 RF passage

and tuner circuitry

Start

Illuminant

pipe damaged

Check IC 3Y26 & around

applicative circuitry

Replace IC U7

AKAI AFT-505 (5” TFT LCD COLOR TV) Service Manual Page 5 of 5

5、Fault Description: No Sound, No LCD Illuminant.

YES

Subject to change without notice.

Does it supply 12VDC

power correctly.

Check whether Q7 E side

has 12V voltage.

Check the power jack

& fuse F1

Check IC U2 (17) plug has

+5V output

Check whether IC

U2 (22) plug has

+5V power supply

Check whether Q7 C

side has 12V power

supply

Check T2, U5

applicative

circuitry

Crystal pipe Q7

damaged

Start

Check and replace

IC U2

Check power supply

circuitry

D D

C C

B B

A A

CPU

1 4

ZD2.025.0 55DL

TITLE

DRAWING NO.

DATE SHEET OF

DRAWCHECK DESIGNAPPROVED

SCHEMATIC DIAGRAM

BU L/R

U/D

4.5MHz

STB

SCL

SDA

BLANK

50/60

MON

CLK

FSC

RESET

VDD

VCC1

33V

VDD

VCC1

33V

VCC1

10K

M37160

21 22

EEP SCL

R VOL

L VOL

REAR VIEW

SECAM L

KEY

L/R

U/D

4.5MHz OUT

A MUTE

ASPE1

ASPE2

POWER

GND

Vcc Vcc

FILT

IR IN

FACTORY ADJ

S-VHS IN

RESET

FSC IN

50/60 OUT

AV2

AV1

CLK CONT

BLANK

V SYNC

H SYNC

MONITOR

VCJ SDA

EEP SDA

VJC SCL

R15 22K

R17 22K

22K

R11

33K

10K

R10

4.7K

R21 22K

R20 1K

R19 1K

R18 1K

R16 22K

R33

330

R31

220

R32

220

R37

R40

2.2K

R35

820

R34

560

10K

R26 100

R29

22K

R30 10K

R38

R12

33K

R13

33K

R14

33K

0.22uF/50V

100pF

10K

24C08N-10SC

8A0

GNDSDA

SCL

Vcc

PH2369

C11

100uF/16V

100pF

0.01uF

C10

0.01uF

C12

0.01uF

PIC-1018SMD

OUT

GND

Vcc

2SA1015

C13

47uF/6.3V

R39

100

470pF

R23 1K

R36

22K

R28 10K

TEST3AB

TS1565W0-V50C

3 4

470pF

R25 22K

CN1

PH-2

CN2

PH-2

　　 AKAI AFT-505

D D

C C

B B

A A

ZD2.025.0 55DL

TITLE

DRAWING NO.

DATE SHEET OF

DRAWCHECK DESIGNAPPROVED

SCHEMATIC DIAGRAM

-15V

17V

50/60

L/R

U/D

7.5V

VIDEO

C15

0.1uF

C18

0.1uF

C19

0.1uF

C22

0.1uF

C20

0.1uF

C17

0.1uF

C16

0.1uF

C33

0.1uF

C31

0.1uF

C28

0.1uF

C26

0.1uF

C32

820pF

C35

0.1uF

C30

0.1uF

C29

0.1uF

C24

47uF/16V

C23

0.1uF

C34

100uF/16V

C14

100uF/16V

FRP

CSY

VGH

VGL

GND

VDD

VCC

GND

CKC

VST

U/D

R/L

N/P

CN3

1.0S-6S-20PWB

100uH

C25

0.1uF

R22

8.2K

R68

10K

IR3Y26A

SYNC SEP

COM-A

COM-B

CON

B IN1

GND

G IN1

R IN1

VCC1

B IN2

G IN

R IN2

HF.I

REG

HF.O

GAM-0

GAM-1

GND

R OUT

R DC

GND

G OUT

G DC

VCC2

B OUT

B DC

SB B

SB R

RGB A

BRI

SC B

SC R

COM

FRP

SYNC IN

SYNC OUT

R45

10K

R51

R50

R49

R43

R44

12K

R47

100

R56

100

R53

100

R48

100

R57

560

R55

OPEN

R59

100

R46

10K

R60

33K

R58

R41

R61

18K

R52

10K

R54

R42

100uH

C21

0.1uF

C27

1uF

ＬＣＤ　ＤＲＩＶＥＲ

　　　AKAI AFT-505

D D

C C

B B

A A

ZD2.025.0 55DL

TITLE

DRAWING NO.

DATE SHEET OF

DRAWCHECK DESIGNAPPROVED

SCHEMATIC DIAGRAM

STB

-15V

7.5V

17V

33V

12V

+12V

R27

10K

R98

C125

0.01uF

C57

10uF/50V

R72

100K

C54

47uF/25V

R67

C90

10uF/50V

30R090

C46

220uF/10V

R66

C37

100uF/16V

upc574

R74

100uH

TL3843D-8

4 5

COMP

VFB

ISENSE

RT/CT GND

OUT

VCC

REF

C36

27pF/3KV

KDI190

NTF3055L108T

C41

470uF/25V

R70

150K

R78

24K

R79

22K

C38

0.056uF/250V

R75

R69

6.8K

R77

R76

R73

C59

470pF

2SB1203

C56

1500pF

DC-004

C48

0.1uF

C53

0.1uF

C43

100uF/16V

2SC1815

R63

1.5K

1N5819

100uH

EI14.5-30534

1N4148

R62

OPEN

1N4148

C44

100pF

1SS311

1N5819

KTC4379

C47

0.01uF

KTC4379

C39

0.01uF

C52

0.01uF

R65

100K

C51

100pF

CN4

SM02(8.0)B-BHS-1-TB

C40

47uF/25V

C58

0.01uF

C55

0.01uF

C49

100uF/16V

C45

220uF/10V

C123

2200pF

ＰＯＷＥＲ

AKAI AFT-505

D D

C C

B B

A A

TITLE

DRAWING NO.

DATE SHEET OF

DRAWCHECK DESIGNAPPROVED

SCHEMATIC DIAGRAM

+12V

4.5MHz

SCL

SDA

BLANK

STB

RESET

FSC

CLK

VDD

12V

VIDEO

MON

VCC1

12V

VCC1

VCC2

12V

78L09

3 1

VIN VOUT

GND

R88

Q11

KTC4376

C64

0.01uF

TUNER

AGC

GND

C68

0.01uF

C73

0.22uF

M61260FP

VRAMP CAP

AFT OUT

VIF VCC

SIF VCC

VRAMP OUT

VRAMP FB

AFC FILTER

DEF GND

LOGIL GND

FBP IN

H OUT

DEF VCC

VDD DECOUPLING

R OUT

G OUT

B OUT

HVCO FB

MONITOR OUT

INV FBP OUT

VP OUT

B IN

G IN

R IN

FAST BLANK

CLK CONT

SDA

SCL

P-ON CONT

FSC OUT

MCU RESET

Y SW OUT

MCU5.7V

ABCL

X-TAL

DRIVER GND

V/C GND

CHROMA APC FILTER

EXT/C IN

DRIVER VCC

V/C VCC

TV/Y IN

VREG VCC

DDS FILTER

HI VCC

SECAM BELL FB

SECAM PLL FB

8.7V

CARRIER OUT

5.7V

SIF FB

AUDIO OUT

EXT AUDIO IN

FM DIRECT OUT

VIF VCO FB

SIF GND

VIF GND

VIF VIDEO OUT

RF AGC OUT

VIF APC FILTER

PAL IDENT FILTER

IF AGC FILTER

VIF IN1

VIF IN2

AUDIO BYPASS

C66

0.01uF

C62

100uF/16V

C77

0.22uF

CF2955M

GND

OUT

C117

100uF/16V

ST-3507-02

C87

100uF/16V

C61

1uF

NJM386B

1 8

4 5

GAIN GAIN

-IN

GND OUT

V+

BYPASS

ST-3507-02

C106

220uF/16V

C99

1uF

C60

1uF

ST-3507-02

C108

100uF/16V

C81

1uF

C94

1uF

ST-3507-02

C84

47uF/16V

C75

1uF

ANT1

ANTENNA

C82

10uF/16V

C112

1uF

R117

10K

C113

0.01uF

C63

47uF/16V

C93

0.1uF

C109

0.01uF

100uH

R114

OPEN

C100

0.1uF

R115

OPEN

C102

0.47uF

C67

47uF/16V

C104

0.22uF

C70

10uF/16V

C111

1uF

C115

0.01uF

C116

47uF/16V

C103

0.01uF

C118

0.01uF

C110

220uF/16V

R95

C119

0.01uF

C114

0.1uF

C105

0.01uF

C120

OPENC121

1uF

C83

100uF/16V

R83

47K

L11

100uH

CN5

PH-2W

C92

220uF/10V

R80

12K

C95

0.01uF

MMBZ5V6ALT1

C69

0.01uF

Q13

2SC1815

C122

2200pF

C50

2200pF

R101

220

R104

100

R24

10K

R82

C76

0.01uF

R99

C72

0.01uF

R102

OPEN

R132

6.8K

C79

0.01uF

R124

10K

C85

0.01uF

C89

0.01uF

R125

22K

C80

0.01uF

R123

2.2K

C86

0.01uF

R128

2.2K

C91

24pF

R126

2.2K

C97

39pF

R119

2.2K

MMBZ5V6ALT1

C96

100pF

R116

C101

22pF

R118

2.2K

R107

470

R134

OPEN

R108

470

R122

R129

4.7K

R106

R121

39/0.5W

4.433619MHz-16

R105

10K

R94

R96

100

R92

10K

33uH

R97

2.2K

R90

47K

C65

1uF

R93

6.8K

R87

6.8K

L10

1801A

R84

R91

680

100uH

R86

390

R100

R120

1uH

R89

150

C107

0.047uF

R103

2.2K

C98

2200pF

R110

1.5K

R85

4.7K

R111

680

R112

100K

R113

R109

15K

C74

16pF

Q15

2SC1815

R81 33

Q12

2SC9018

C71

180pF

Q10

KTC4376

C78

0.01uF

AKAI AFT-505

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