SCH04 NETWORK
GND LINE
POWER- LINE
POWER+ LINE
ANALOG AUDIO
DIGITAL AUDIO
STBY POWER
1.
N
C
2.
N
C
3.
N
C
4.
5
V0
5.
5
V0
6.
5
V0
7.
A
IO
S4_
M
CL
K_
I2
S_
0
8.
N
C
9.
G
N
D
10
.
G
N
D
11
. A
IO
S4_
LR
CK
_I
2S
_0
12
. N
C
13
. A
IO
S4_
SC
LK
_I
2S
_0
14
. A
IO
S4_
I2
S_0_
O
U
T
15
.
G
N
D
16
.
G
N
D
17
. N
C
18
. N
C
19
. N
C
20
. N
C
21
.
G
N
D
22
.
G
N
D
23
. A
IO
S4_
LR
CK
_I
2S
_2
24
. A
IO
S4_
I2
S_2_
IN
25
. A
IO
S4_
SC
LK
_I
2S
_2
26
. N
C
27
.
G
N
D
28
.
G
N
D
29
. A
IO
S4_
I2
C_0_
SD
A
30
. A
IO
S4_
U
SB
_D
M
31
. A
IO
S4_
I2
C_0_
SC
L
32
. A
IO
S4_
U
SB
_D
P
33
.
G
N
D
34
.
G
N
D
35
. N
C
36
. A
IO
S4_
TP
0_
N
37
. N
C
38
. A
IO
S4_
TP
0_
P
39
. N
C
40
.
A
IO
S4_
R
XI
_N
41
. N
C
42
. A
IO
S4_
RX
I_
P
43
.
G
N
D
44
.
G
N
D
45
. N
C
46
. N
C
47
. A
IO
S4_
U
A
RT
_T
X
48
. A
IO
S4_
U
A
RT
_R
TS
49
. A
IO
S4_
U
A
RT
_R
X
50
. A
IO
S_
U
A
RT
_C
TS
51
. A
IO
S4_
U
SB
_V
BU
S_
EN
52
. N
C
53
.
A
IO
S4_
U
SB
_F
A
U
LT
N
54
. A
IO
S4_
W
A
KE
_U
P
55
. A
IO
S4_
ST
BY
_S
TA
TT
U
S
56
. N
C
57
. N
C
58
. A
IO
S4_
CP
_R
ES
ET
59
. N
C
60
. N
C
61
. N
C
62
. N
C
63
. N
C
64
. N
C
65
. N
C
66
. N
C
67
. N
C
68
. N
C
69
. N
C
70
. N
C
71
. N
C
72
. N
C
73
. N
C
74
. A
IO
S4_
RE
SE
T_
IN
75
. N
C
76
. A
IO
S4_
M
O
D
U
LE
_I
S_
A
W
A
KE
77
. A
IO
S4_
M
B_
TY
PE
78
. A
IO
S4_
M
B_
RE
V
IS
IO
N
79
. A
IO
S4_
M
B_
TY
PE
_2
80
. N
C
1.
N
C
2.
G
N
D
3.
G
N
D
4.
N
C
5.
N
C
6.
N
C
7.
G
N
D
8.
N
C
9.
N
C
10
. N
C
11
. N
C
13
. N
C
14
. N
C
15
. N
C
16
. N
C
17
. N
C
18
. N
C
19
. N
C
20
.
G
N
D
21
. N
C
22
. N
C
23
. N
C
24
. N
C
25
. N
C
26
. N
C
27
. N
C
28
. N
C
29
. N
C
30
. N
C
31
. N
C
32
. N
C
33
.
G
N
D
34
.
G
N
D
35
. N
C
36
. N
C
37
. N
C
38
. N
C
39
. N
C
40
. N
C
41
. N
C
42
. N
C
VBUS
USBD+
USBD-
DGND
DGND
GN
D
SD
A
NC
NC
VC
C
RS
T
SC
L
NC
GND
IN
IN
EN
/OC
OUT
OUT
OUT
NC
FROM LEGO MODULE
TO USB PCB
1O
E
2O
E
VC
C
2A
4
1Y
1
2A
3
1Y
2
2A
2
1Y
3
2A
1
1Y
4
1A
1
1A
2
2Y
4
1A
3
2Y
3
1A
4
2Y
2
GN
D
2Y
1
+5VD_SW
DGND
DGND
TO SMPS PART
DGND
+5VD
MCU
USB
ETHERNET
LEGO AOUT
DIST AIN
+5VD_SW
+5VD_SW
ETHERNET
DGND
DGND
DGND
DGND
DGND
DGND
TO MAIN PCB
AIOS4_MCLKO
AIOS4_MCLK_I2S_O
EL
N
A
R
FO
68
67
70
69
72
71
74
73
76
75
78
77
80
79
2
1
4
3
5
6
7
8
9
10
11
12
14
13
15
16
26
25
23
24
22
21
20
19
18
17
28
27
30
29
59
60
57
58
47
48
49
50
51
52
54
53
55
56
46
45
43
44
42
41
40
39
38
37
36
35
33
34
31
32
62
61
64
63
65
66
CN111
CJP80GA370ZU
1
2
4
3
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
CN112
CJP42GA370ZU
C113
9
0.
1
L1111
220R/2A
R1184
2.2K
R1183
2.2K
D
110
1
O
PE
N
D
110
2
O
PE
N
D
110
3
O
PE
N
D
110
4
O
PE
N
T117
T11
9
T120
T123
C114
0
1/
10
V
C114
1
1/
10
V
R1182
OPEN
R1118
OPEN
T116
C114
8
O
PE
N
C114
9
O
PE
N
T124
T125
R118
1
10
K
C114
3
O
PE
N
C1147
0.1
C114
6
0.
02
2
9
8
7
6
5
4
3
2
1
IC
11
1
M
FI337
S395
9
8
7
6
5
4
3
2
1
IC112
BD82065FVJ-E2
10
9
8
7
6
5
4
3
2
1
JK110
CJJ9L038Z
C114
2
O
PE
N
C114
5
O
PE
N
C114
4
O
PE
N
5
4
3
2
1
BN63
VWB1C905120AQI001
R115
3
10
K/
D
R115
2
10
K/
D
R115
4
300
/D
R116
0
300
/D
R116
1
6.
8K
/D
R115
1
10
K/
D
R112
3
33
R112
4
33
R112
5
33
R112
8
33
R112
9
33
R113
2
10
K
R113
5
33
R113
6
10
K
R113
7
33
R113
8
33
R114
0
33
R114
1
33
R114
3
33
R114
9
33
C113
2
4.
7/
6.
3V
C113
3
4.
7/
6.
3V
C113
4
4.
7/
6.
3V
C113
5
0.
1
C113
6
0.
1
C113
7
0.
1
R115
9
O
PE
N
R115
8
O
PE
N
R115
7
47
K
R115
6
47
K
R117
0
56
K
R118
5
4.
7K
R112
6
33
R112
7
33
R113
0
10
K
R113
3
33
R113
4
0
R114
2
10
K
R114
4
10
K
R114
5
10
K
R114
6
10
K
R113
9
0
R1155
33
R116
9
33
K
C1138
0.1uF
L1112
EXC34CE900U
L1113
EXC34CE900U
L1109
OPEN
1
2
3
4
RN110
0x2
BK110
BK111
BK112
BK113
C115
0
0.
1
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
14 13
IC
11
4
SN
74
LV
C244
A
PW
R
R1180
10K
R116
7
10
K
R116
8
10
K
R114
7
10
K
R116
2
10
K
R116
3
10
K
R116
4
10
K
R116
5
10
K
R116
6
10
K
R113
1
10
K
R1179
10K
R1178
10K
R1177
10K
R1176
10K
R1175
10K
R1174
10K
R1173
10K
R1172
10K
R1171
10K
R114
8
10
K
R115
0
10
K
C112
5
0.
01
uF
C112
4
16
V/
0.
1u
F
C112
3
16
V/
100
uF
C112
2
0.
01
uF
C112
1
1000
pF
C111
8
16
V/
100
uF
C111
9
0.
1u
F
C112
0
0.
1u
F
L1108
BLM21PG221SN1
L1107
BLM21PG221SN1
L1106
BLM21PG221SN1
T113
T114
6
5
4
3
2
1
Q
110
1
FD
C608
PZ
C112
8
0.
1
R1110
10K
C112
7
0.
01
R110
9
10
K
T121
T122
R111
2
O
PE
N
R1111
OPEN
6
5
4
3
2
1
Q
110
2
FD
C608
PZ
C113
1
0.
1
R1115
27K
C113
0
0.
01
R111
4
10
K
T111
T115
R111
7
O
PE
N
R1116
OPEN
R1113
OPEN
C112
6
O
PE
N
C112
9
O
PE
N
Q1104
KRC102S
Q1103
KRC104S
C111
4
0.
01
uF
C111
5
1000
pF
C111
6
0.
1u
F
C111
7
0.
01
uF
5
4
3
2
1
CN92
CJP05GJ289ZY
SW110
CST1A047ZT
C115
1
0.
01
uF
R1186
0
T110
20
21
23
22
19
18
16
17
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
WF60
CJP23GA117ZY
R110
1
33
R1119
33
R1120
33
R1121
33
R112
2
47
K
R1188
0
3
Y
A
GND
VCC
OE
2
4
5
1
IC113
CVISN74LV1T125DBVR
R1102
10K
C110
1
25
V/
100
uF
BK114
BK115
BK116
LEGO5V
NET3.3V
D5V
LEGO5V
D5V
NET3.3V
NET3V3_POWER
NET5V_POWER
DGND
+5V_SW
DGND
DGND
NET5V_POWER
AIOS4_MCLKO
AIOS4_LRCK_I2S_0
AIOS4_SCLK_I2S_0
AIOS4_SDOUT_I2S_0
LRCK_I2S_2
SDIN_I2S_2
SCLK_I2S_2
E_RXD_MIEO
E_CTS_MIEO
E_TXD_MOEI
E_RTS_MOEI
AIOS4_WAKEUP
AIOS4_STBY_STATUS
AIOS4_FACT_RST
DGND
DGND
NET3V3_POWER
WF60
BN63
CN92
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
12