- 3 -
SCHEMATIC DIAGRAM
UD-503
UD-503
1
2
3
4
5
6
7
8
A
B
C
D
E
Z
MAIN PCB (2/6)
Guarding
CLK10M IN
GND Shield
This Area is Island Pattern.
GND Pattern,1 Point connect.
For DAB/HD_Radio Module
UD Only
AC Trans SECONDARY VOLTAGE
Another Area SPACE 4mm
Pattern Width 1.0mm
For DAB/HD_Radio
GND Shield
Guarding
50KHz
P3V3IO
GNDD
GNDD
GNDD
P3V3IO
GNDD
GNDD
GNDD
P3V3IO
GNDD
GNDD
GNDD
GNDD
P3V3IO
GNDD
GNDD
P3V3IO
GNDD
GNDD
P3V3IO
GNDD
GNDD
P3V3
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
P5V
GNDD
GNDD
GNDD
P3V3IO
GNDD
GNDD
GNDD
GNDD
GNDD
P3V3IO
GNDD
GNDD
GNDD
GNDD
GNDD
GNDD
SEL_n22_24
5
S50K_IN
6
DAB_SPDIF
1
RX_F
3,4
TX
3,6
/DAB_BT
5
FREE_CLK
5
SYNC_CLK
5
22.5792MHz
5
24.5760MHz
1,5
En22M
5
En24M
5
/DAB_RST
5
UD_PON
6
C169
10U
D13
RB161L-40
U7
BA05CC0T
GN
D
2
IN
1
OUT
3
TP100
X2
NZ2520S-22MHz
E/D
1
VSS
2
OUT
3
VDD
4
+
C48
2200U/25V 105
℃
13x25
TP106
R393
1k
U6
NZ2520S-24MHz
E/D
1
VSS
2
OUT
3
VDD
4
R69
180
C49
0.1U
D6
RB161L-40
P3
P2404-A
1
2
4
5
3
F1
T 500mA L 250V (372series)
R60
180
R72
47
R392
10
R64
47
C43
0.1U
C168
10U
L74
BLM18PG471SN1
TP101
R55
330
TP105
L22
MPZ1608S221AT
D7
N.M.(1SS355)
D8
RB161L-40
C44
1000P
L77
BLM18PG471SN1
R56
10
C47
10U
R59
100 1/2W 50*25mm
L19
BLM18PG471SN1
C46
10U
L13
BLM18PG471SN1
L21
BLM18PG471SN1
U32
S-1172B12-U5T1G
ON/OFF
1
VSS
2
NC
3
VIN
4
VOUT
5
R74
47
R68
10
TP102
F2
T 500mA L 250V (372series)
D9
RB161L-40
Si5350C-B03653-GTR
U5
VDD
1
XA
2
XB
3
P0
4
CLKIN
5
CLK2
6
VDDO
7
GND
8
CLK1
9
CLK0
10
L75
BLM18PG471SN1
C50
1000P
P6
B8B-PH-SM4-TB
1
2
3
4
5
6
7
8
R70
180
R58
100
C34
1000P
L17
BLM18PG471SN1
TP103
L15
BLM18PG471SN1
R61
N.M.(10)
+
C36
100U/25V DIP 6ΦF5
R63
47k
R54
10
P4
B2B-EH
1
2
U8
SN74LVC2G125DCT
1OE
1
1A
2
2A
5
VCC
8
GND
4
2Y
3
1Y
6
2OE
7
L16
BLM18PG471SN1
R66
330
+
C29
100U/25V DIP 6ΦF5
TP104
+
C30
10U/25V 4*5.5 SMT
C40
0.1U
L18
BLM18PG471SN1
D3
RB558W
R62
100 1/2W 50*25mm
C32
N.M.(100p)
R65
10K
C41
1000P
R73
1K
R75
47
D10
RB161L-40
C38
0.1U
C31
0.1U
U4
SN74LVC2GU04DCK
1A
1
GND
2
2A
3
2Y
4
VCC
5
1Y
6
L76
BLM18PG471SN1
C45
10U/25V 1206
D11
RB161L-40
TP144
R53
47k
C167
0.1U
C42
10U
P5
B2B-EH
1
2
C35
0.1U
D12
RB161L-40
R57
180
D4
1SS355
L20
BLM18PG471SN1
C39
10U
D5
RB161L-40
L14
BLM18PG471SN1
R71
47