Schematics

Power amplifier circuit
Y-2219 schematic diagram
Main control, blue light schematic
Key Circuit
Charging Circuit
Battery circuit
Lamp circuit
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
U3/
AB5365C
C4
104
1
2
3
4 5
6
7
8
U4
XA8871C
C3
105
R43
20K
C9
473
C13
225
1
VBUS
2
D-
3
D+
4
ID
5
GND
6
SHIELD1
7
SHIELD2
8
SHIELD3
9
SHIELD4
USB2
LED1
RED
R1
1K
1
2
3 4
5
U2
4054
R2
2.7K
C14
104
C1
104
BT-ANT
Y2
26MHZ
LED2
BLUE
1
2
3
SW2
SW2
BAT1
3.4V~ 4.2V
SPOUT8
SP4
SP6
S1
S2
S3
R14
47K
R4
NC
R3/
4.7R
C7
104
C6
104
PTC
MF52A 10KΩ±1%
MUTE
MUTE
VMCU
AB/D
DACL
AB/D
3.3V
USBDP
P/P
PREV/-
LED
NEXT/+
DACL
VMCU
VMCU
VMCU
VBAT
VBAT
VMCU
LED_OFF/ON
NEXT/+
P/P
PREV/-