江南家电维修论坛会员专用!
http://bbs.520101.com
32
Circuit Diagrams and PWB Layouts
i-Board
1
2
3
4
5
6
A
B
C
D
6
5
4
3
2
1
D
C
B
A
X1
16MHz
To TV
BD
SR
R7
100R
1
3
2
Q2
BC847BW
R8
68R
R9
220R
+5VA
C8
100nF
HSYN
VSYN
C
V
BS
T
E
RR
LEDIN_CLK_TXD_SCL1
IR-IN_DATA-IN_RXD_SDA1
MODE
STATUS_DATA-OUT
IR_OUT
HSYNC
VSYNC
TXD232
RXD232
DCM_POR
+12V
Za
14
Zb
15
Zc
4
Sa
11
Sb
10
Sc
9
Vd
d
16
Y1a
13
Y0a
12
Y1b
1
Y0b
2
Y1c
3
Y0c
5
Vss
8
Vee
7
E
6
U2
HEF4053BT
R10
100R
R11
100R
+5VA
C9
100nF
IRIN_DATA-IN
DATA-IN_SDA1
Za
14
Zb
15
Zc
4
Sa
11
Sb
10
Sc
9
V
d
d
1
6
Y1a
13
Y0a
12
Y1b
1
Y0b
2
Y1c
3
Y0c
5
Vss
8
Vee
7
E
6
U3
HEF4053BT
R
1
31
0
0R
C11
100nF
+5VA
Tristate
STATUS_DATA_OUT1
R1
5
1
0
K
R1
6
1
00
R
1
2
3
Q3
BC857BW
R17
150R
+5VA
1
3
2
Q4
BC847BW
R18
1K0
R19
10K
+5VA
1
3
2
Q5
BC847BW
R20
10K
Za
14
Zb
15
Zc
4
Sa
11
Sb
10
Sc
9
Vd
d
16
Y1a
13
Y0a
12
Y1b
1
Y0b
2
Y1c
3
Y0c
5
Vss
8
Vee
7
E
6
U4
HEF4053BT
C12
100nF
+5VA
IB_IROUT
IR_IN TV
P1
.5
/CE
X
2
1
P1
.6/
S
C
L
2
P
1.
7/
S
D
A
3
R
S
T
4
P3
.0/
R
xD
5
N
IC
*
6
P3
.1
/T
xD
7
P
3.
2/
IN
T
0
8
P3
.3
/I
N
T1
9
P3
.4
/C
EX
3
/T
0
1
0
P
3.
5/
C
E
X
4
/T
1
1
1
P3.6/WR
12
P3.7/RD
13
XTAL2
14
XTAL1
15
VSS
16
NIC*
17
P2.0/A8
18
P2.1/A9
19
P2.2/A10
20
P2.3/A11
21
P2.4/A12
22
P2
.5
/A
1
3
2
3
P2
.6
/A
1
4
24
P2
.7
/A
1
5
25
PSE
N
26
A
LE
27
NI
C
*
28
EA
/V
p
p
29
P0
.7
/A
D
7
30
P0
.6
/A
D
6
3
1
P0
.5/
A
D
5
32
P0
.4
/A
D
4
33
P0.3/AD3
34
P0.2/AD2
35
P0.1/AD1
36
P0.0/AD0
37
VCC
38
NIC*
39
P1.0/T2
40
P1.1/T2EX
41
P1.2/ECI
42
P1.3/CEX0
43
P1.4/CEX1
44
U5
P89C664HBBD
1
8
2
7
3
6
4
5
RP2
10K-RP
1
8
2
7
3
6
4
5
RP3
10K-RP
+5VD
+5VD
RJIR_IN
PC
_
T
V
_
LE
D_
O
U
T
R21
100R
LED_SEL_OUT
R22
100R
LIGHT SENSOR
R24
4K7
R23
4K7
R25
100R
R26
100R
+5VD
SCL
SDA
C13
27pF
C14
27pF
R
X
D
TX
D
R28
10K
R27
10K
+5VD
R29
2K2
+5VD
1
3
2
Q6
BC847BW
R31
22K
R32
22K
L11
6.8uH - 1008
C25
1uF
+5VD
RST
1
VCC
2
GN
D
3
U6
DS1813
R30
5K6
1
2
3
4
SW1
T
ac
t
Sw
itc
h
,
S
K
QN
AB
D0
1
0
DCM_POR
CLK_LED-IN_SCL1
C16
27pF
C17
27pF
1
8
2
7
3
6
4
5
RP4
10K-RP
RXD
TXD
T
X
D
RX
D
+5VD
STATUS_DATA_OUT1
R33
100R
SPARE IO
R34
100R
R35
100R
SCL1
SDA1
C18
100nF
GNDA
PEND_IR
R
C_
IR
PC_TV_LED
R38
220R
L8
6.8uH - 1210
+5V
+
C26
100uF, 16V
C27
100nF
+5VD
IR_PULLUP
GNDA
RC_IR
R40
4K7
R39
4K7
+5VD
C35
10nF
C31
10nF
C30
10nF
C32
10nF
C33
10nF
C34
10nF
R48
22K
1
3
2
Q7
BC847B
C37
10nF
1
8
2
7
3
6
4
5
RP5
10K-RP
1
8
2
7
3
6
4
5
RP1
10K
-R
P
1
3
2
Q12
BC847B
1
3
2
Q13
BC847B
R63 47K
R64
10K
R67 100R
R68
100R
C41
RESERVE
SDA3
TV_POR
+5VD
SDA2
SCL2
+5VD
SDA3
R7
0
1
00R
LCM_POW
C15
1uF
1
2
D
1
B
Z
X
284
-C5
V
6
1
2
D2
B
Z
X
2
84
-C5
V
6
1
3
2
4
5
6
D3
BZA408B
MODE
STATUS_DATA-OUT
IR_OUT
1
3
2
4
5
6
D4
BZA408B
+12V
GNDA
1
2
3
4
5
6
J5
6PIN-CONN
1
2
3
4
5
6
7
8
9
10
J6
10PIN-CONN
CVBSTERR
TV_POR
PC_TV_LED_OUT
LED_SEL_OUT
RC_IN
R87 0R - NL
R80
68R
C50
10pF
C51
10pF
PC_TV_LED
R81
68R
C52
10pF
C53
10pF
R82
68R
C54
10pF
C55
10pF
LED_SEL
R83
68R
C56
10pF
C57
10pF
R84
68R
C58
10pF
C59
10pF
RC_IR
R85
68R
C60
10pF
C61
10pF
R86
68R
C62
10pF
C63
10pF
LED_RED
IR_IN TV
LIGHT SENSOR
+5V
C65
10pF
+5V
+3V3STBY
I/P
1
O/P
3
G
ND
2
U9
LF50CV
+
C69
1000uF, 10V
C68
1UF
+ C70
220uF, 10V
+5V
+5V
L5
6.8uH - 1210
+
C5
100uF, 16V
+ C6
100uF, 16V
L6
6.8uH - 1210
+5VD
+5VA
LCD Clock
SDA2
SCL2
C7
100nF
C38
27pF
C39
27pF
R72
1K
LCM_POW
R71
0R
R73
4K7
SDA2
SCL2
LCM_POW
+12V
1
2
3
J11
3P-CONN-PH-H
L17
BLM21P221SN1D
C71
10pF
C72
10pF
+12V
Outside connector
Inside connector
1
2
3
Q8
BC857BW
R51
10K
R52
22K
1
3
2
Q9
BC847B
R55
4K7
R54
10K
R53
47K
VSYN
+5VA
1
2
3
Q10
BC857BW
R56
10K
R57
47K
1
3
2
Q11
BC847B
R60
4K7
R59
10K
R58
47K
+5VA
HSYN
H
S
Y
NC
To TV
BD
SR
+3V3STBY
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2_OUT
7
R2_IN
8
R2_OUT
9
T2_IN
10
T1_IN
11
R1_OUT
12
R1_IN
13
T1_OUT
14
GN
D
15
V
C
C
16
U7
ST202ECD
TXD232
RXD232
C19
100nF
C20 100nF
C21
100nF
+
C22
100uF, 16V
L12
6.8u - 1210
+5V
C24
100nF
C23
100nF
R36
100R
R37
100R
T
XD
R
XD
R62
100R
R61
100R
E0
1
E1
2
E2
3
VSS
4
SDA
5
SCL
6
WC
7
VCC
8
U8
MC24C16
SCL1
SDA1
C42
100nF
+5VD
L7
BLM21P221SN1D
R120
Res
R121
Res
1
2
3
Q14
PBSS5140U
+5V
R94
100R
MODE_R
+12V
L18
BLM21P221SN1D
5V
_J
4
L20
B
L
M
21P
2
2
1S
N
1
D
L19
BLM21P221SN1D
R104
0R
R1
0
3
10
K
+5VA
RC_IR
IR
_I
N
T
V
IR_IN TV
IB
_
IR
O
U
T
VSYNC
HSYNC
TXD232
RXD232
DCM_POR
RXD
TXD
(not use)
R
JI
R_
IN
RXD
TXD
ST
A
TU
S
_
D
A
TA
_
O
U
T1
SD
A
3
LC
M
_P
O
W
S
DA
2
SC
L
2
LC
M
_
P
O
W
C74
1UF
1
2
J13
2PIN-CONN
K
1
A
2
D5
BAT760
1
2
4
V
5
G
3
U10
74HC1G86
+5VD
R106
0R
1
2
4
V
5
G
3
U11
74HC1G86
+5VD
R107
0R
R111
0R
R109
0R RES
K
1
A
2
D6
BZX284-C5V1
R99
NFR25-15R
R112
NFR25-15R
R119
0R
L21
6u8
+3V3STBY
+3V3
R114
1R5
8
7
6
5
1
2
3
4
Drive
Ipk Sense
Vcc
Comparator
Inv. I/p
Switch
Coll ector
Switch
Emitter
Timing
Capacitor
Ground
Coll ector
U12
MC34063AD
R115
220R
R113 1R5
R117
2K7
R118
470R
R116
1K0
C78
100pF
A
K
D7
SS24
L22
68uH
+
C75
220uF, 16V
+ C80
220uF, 16V
L23
6.8uH
+
C81
220uF, 16V
+5V
C79
10uF
C76
10uF
D8
B
Z
X
3
84-
C
5V
6
C77
1nF
L24
BLM21P221SN1D
C82
10pF
C83
10pF
+12V
1
2
3
J14
3P-CONN-PH-H
L25
BLM21P221SN1D
C84
100nF
R122
10K
R1
2
3
0
R
R124
10K
R1
2
5
10K
R126
0R
Inside connector
1
2
3
4
J15
4PIN-CONN
1
2
3
4
J10
4PIN-CONN
1
2
3
4
5
6
7
8
9
10
11
12
J4
B12B-PHDSS-B
Notice:
J4 connector
Even nos. to SSB
Odd nos. to IRLED
R1
100R
LE
D
_
S
EL
R46 4K7
R47
4K7
R2
100R
1
3
2
Q1
BC847B
R3
10K
LED_SEL_OUT
D9
BZX384-C2V7
R4
2K2
+
C36
100uF, 16V
1
2
3
4
J1
4P-CONN-TYCO
1
1
2
2
3
3
4
4
5
5
J12
5P-CONN-TYCO -NL
1
2
3
4
J2
4P-CONN-SR-V
1
2
3
4
5
J3
5P-CONN-SR-V
1
2
3
J9
3P-CONN-SR-V
DGND1
DGND2
DGND3
R108
NFR254R7
R69
1K
1
3
2
Q15
BC847B
R41
2K2
R42
0R OPT
R44 10K
HC
HC
i-BOARD
3139 123 6123.1
H_17360_058.eps
170907