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
NO YES
ON
YES
SEY
NO
YES
NO
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
No
No
Yes
No
Yes
NO
Yes
NO
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
NO
YES
NO
NO
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
NO
YES
OK NO
YES ON
NO
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
NO
YES
YES
NO
YES
NO
NO
YES
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

A
A
B
B
C
C
D
D
E
E
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
BL
BH
BU L/R
U/D
4.5MHz
STB
VT
SCL
SDA
B
G
R
BLANK
50/60
MON
HD
VD
CLK
FSC
RESET
VDD
VCC1
33V
VDD
VCC1
33V
VCC1
BM
R2
10K
U2
M37160
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
EEP SCL
VT
R VOL
L VOL
REAR VIEW
SECAM L
VL
VH
U
KEY
L/R
U/D
4.5MHz OUT
A MUTE
ASPE1
ASPE2
POWER
GND
GND
NC
Vcc Vcc
FILT
IR IN
FACTORY ADJ
S-VHS IN
RESET
FSC IN
50/60 OUT
AV2
AV1
CLK CONT
BLANK
R
G
B
V SYNC
H SYNC
MONITOR
VCJ SDA
EEP SDA
VJC SCL
R15 22K
R17 22K
R5
22K
R6
22K
R1
22K
R11
33K
R9
10K
R10
4.7K
R21 22K
R20 1K
R19 1K
R18 1K
R16 22K
R33
330
R31
220
R32
220
R37
1K
R40
2.2K
R35
820
R34
560
R3
10K
R26 100
R29
22K
R30 10K
R38
1K
R12
33K
R13
33K
R14
33K
C3
0.22uF/50V
C4
0.22uF/50V
C5
100pF
C6
100pF
R8
10K
R7
10K
R4
10K
U1
24C08N-10SC
1
2
3
45
6
7
8A0
A1
A2
GNDSDA
SCL
WP
Vcc
Q1
PH2369
+
C11
100uF/16V
C8
100pF
C2
0.01uF
C7
0.01uF
C10
0.01uF
C12
0.01uF
U3
PIC-1018SMD
1
2
3
OUT
GND
Vcc
Q3
2SA1015
Q4
2SA1015
Q2
2SA1015
+
C13
47uF/6.3V
R39
100
C9
470pF
R23 1K
R36
22K
R28 10K
S2
TEST3AB
S1
TEST3AB
S3
TS1565W0-V50C
1
2
3 4
5
6
C1
470pF
R25 22K
CN1
PH-2
1
2
CN2
PH-2
1
2
AKAI AFT-505

A
A
B
B
C
C
D
D
E
E
D D
C C
B B
A A
ZD2.025.0 55DL
42
TITLE
DRAWING NO.
DATE SHEET OF
DRAWCHECK DESIGNAPPROVED
SCHEMATIC DIAGRAM
VR
VG
VB
HD
VD
-15V
17V
50/60
L/R
U/D
5V
7.5V
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
HD
FRP
CSY
VGH
VGL
VB
VR
VG
GND
VDD
VCC
GND
CKC
VST
NC
NC
NC
U/D
R/L
N/P
CN3
1.0S-6S-20PWB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
L1
100uH
C25
0.1uF
R22
8.2K
R68
10K
U4
IR3Y26A
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 46 47 48
NC
SYNC SEP
COM-A
COM-B
CON
B IN1
GND
G IN1
R IN1
VCC1
NC
NC
B IN2
G IN
R IN2
HF.I
REG
SW
HF.O
NC NC NC NC NC
NC
GAM-0
GAM-1
GND
R OUT
R DC
GND
G OUT
G DC
VCC2
B OUT
NC
B DC SB B SB R RGB A BRI SC B SC R NC COM FRP SYNC IN SYNC OUT
R45
10K
R51
1K
R50
1K
R49
1K
R43
1K
R44
12K
R47
100
R56
100
R53
100
R48
100
R57
560
R55
OPEN
R59
100
R46
10K
R60
33K
R58
1K
R41
1K
R61
18K
R52
10K
R54
1K
R42
1K
L2
100uH
C21
0.1uF
C27
1uF
ＬＣＤ ＤＲＩＶＥＲ
AKAI AFT-505

A
A
B
B
C
C
D
D
E
E
D D
C C
B B
A A
ZD2.025.0 55DL
43
TITLE
DRAWING NO.
DATE SHEET OF
DRAWCHECK DESIGNAPPROVED
SCHEMATIC DIAGRAM
STB
-15V
5V
7.5V
17V
33V
12V
+12V
R27
10K
R98
56
C125
0.01uF
+
C57
10uF/50V
R72
100K
+
C54
47uF/25V
R67
1K
+
C90
10uF/50V
F1
30R090
+
C46
220uF/10V
R66
1K
+
C37
100uF/16V
D7
upc574
R74
1K
L6
100uH
L5
100uH
U5
TL3843D-8
1
2
3
4 5
6
7
8
COMP
VFB
ISENSE
RT/CT GND
OUT
VCC
REF
C36
27pF/3KV
T1
KDI190
10
6
4
2
5
1
3
Q9
NTF3055L108T
2
1
3
4
+
C41
470uF/25V
R70
150K
R78
24K
R79
22K
C38
0.056uF/250V
R75
1K
R69
6.8K
R77
1
R76
1
R73
10
C59
470pF
Q7
2SB1203
C56
1500pF
J1
DC-004
C48
0.1uF
C53
0.1uF
+
C43
100uF/16V
Q8
2SC1815
R63
1.5K
D3
1N5819
L3
100uH
T2
EI14.5-30534
1
2
3
4
5
8
10
6
D1
1N4148
D5
1N4148
R62
OPEN
D4
1N4148
C44
100pF
D6
1SS311
D2
1N5819
Q6
KTC4379
C47
0.01uF
Q5
KTC4379
C39
0.01uF
C52
0.01uF
R65
100K
C51
100pF
CN4
SM02(8.0)B-BHS-1-TB
1
2
+
C40
47uF/25V
C58
0.01uF
C55
0.01uF
+
C49
100uF/16V
+
C45
220uF/10V
C123
2200pF
ＰＯＷＥＲ
AKAI AFT-505

A
A
B
B
C
C
D
D
E
E
D D
C C
B B
A A
TITLE
DRAWING NO.
DATE SHEET OF
DRAWCHECK DESIGNAPPROVED
SCHEMATIC DIAGRAM
+12V
4.5MHz
VT
BL
BH
BU
SCL
SDA
BLANK
R
G
B
STB
RESET
FSC
CLK
HD
VD
VR
VG
VB
VDD
12V
5V
VIDEO
MON
5V
VCC1
5V
12V
VCC1
VCC2
12V
BM
BM
U6
78L09
3 1
2
VIN VOUT
GND
R88
47
Q11
KTC4376
C64
0.01uF
T3
TUNER
1
2
3
4
5
6
7
8
9
10
11
12
AGC
VT
BU
BH
BL
BM
IF
RF
GND
GND
GND
GND
C68
0.01uF
C73
0.22uF
U7
M61260FP
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 46 47 48
49
50
51
53
54
55
56
57
58
59
60
61
62
63
64
52
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
Z2
CF2955M
1
2
3
4
5
IN
IN
GND
OUT
OUT
C117
100uF/16V
J5
ST-3507-02
1
2
3
4
5
C87
100uF/16V
C61
1uF
U8
NJM386B
1 8
2
3
4 5
6
7
GAIN GAIN
-IN
-IN
GND OUT
V+
BYPASS
J2
ST-3507-02
1
2
3
4
5
C106
220uF/16V
C99
1uF
C60
1uF
J3
ST-3507-02
1
2
3
4
5
C108
100uF/16V
C81
1uF
C94
1uF
J4
ST-3507-02
1
2
3
4
5
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
L4
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
10
C119
0.01uF
C114
0.1uF
C105
0.01uF
C120
OPENC121
1uF
C83
100uF/16V
R83
47K
L11
100uH
CN5
PH-2W
1
2
C92
220uF/10V
R80
12K
C95
0.01uF
D8
MMBZ5V6ALT1
C69
0.01uF
Q13
2SC1815
C122
2200pF
C50
2200pF
R101
220
R104
100
R24
10K
R82
75
C76
0.01uF
R99
75
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
D9
MMBZ5V6ALT1
C96
100pF
R116
1M
C101
22pF
R118
2.2K
R107
470
R134
OPEN
R108
470
R122
75
R129
4.7K
R106
1K
R121
39/0.5W
Z1
4.433619MHz-16
R105
10K
R94
22
R96
100
R92
10K
L7
33uH
R97
2.2K
R90
47K
C65
1uF
R93
6.8K
R87
6.8K
L10 1801A
R84
1K
R91
680
L9
100uH
R86
390
R100
22
R120
10
L8
1uH
R89
150
C107
0.047uF
R103
2.2K
C98
2200pF
R110
1.5K
R85
4.7K
R111
680
R112
100K
R113
22
R109
15K
C74
16pF
Q15
2SC1815
R81 33
Q12
2SC9018
C71
180pF
Q10
KTC4376
C78
0.01uF
AKAI AFT-505