Schematics

MCU
B+
B-
1
2
3
4
5
6
7
8
9
10
13
14
15
16
17
18
19
20
21
22
23
24
11
12
BAEN
Y1
24M/12P
C23 105
C21 105
C20
105
U4
C24
105
GND
R
DP/GND
DM/L
V+
1
2
3
4
5
68
91
2
U
S
B
R1
470R
D1
RED
-
+
1
C
H
R
G
2
G
N
D
3
B
A
T
4
V
C
C
5
P
R
O
G
U1
4063
R6
1K5
S1
0R
C1
NC
R2
470R
D2 BLUE
R17 2.7P
+
C16
470uF
1
+
2
-
SP-L
CPOIT
OUTN
OUTP
INN
INPAVBAT
CTRL
CN
CP
PVBAT
1
2
3
4
5 6
7
8
9
10
1
1
U3
CS5230E
R16
33K
C19 104
R11 20K
C6 104
C8
475
C12
106
C11
106
R15 10K
C18 224
+
C17
470uF
1
+
2
-
SP-R
CPOIT
OUTN
OUTP
INN
INPAVBAT
CTRL
CN
CP
PVBAT
1
2
3
4
5 6
7
8
9
10
1
1
U2
CS5230E
R14
33K
C15 104
R12 20K
C10 104
C5
475
C9
106
C13
106
R13 10K
R10
7K5
C14 224
C2
NC
C27
NC
C7
105
C4
105
1 2
POWER
1 2
NEXT/V+
1 2
PREV/V-
R4 15K
R5 51K
R8
22K
G
SD
I
N
O
U
T
Q1 ST2301
R3 100K
B
C
E
Q2
9014
R9 1K
R7
10K
+
C26
470uF
D3
BAT54C
C22
105
BAT+
GND
DM
DP
VMCU
3
.
3
V
DACL
VMCU
VMCU
DACL
VMCU
VMCU
MUTE
MUTE
DACL
DACR
ADKEY
ADKEY
3.3V
VMCU
BAEN
BAT+
B
A
T
+
AC6925