3-1
BLOCK DIAGRAM
Block Diagram
Power
Signal
AMPLIFLER
Bluetooth
AUDIO IN
high PASS filter
4558
Li batteries
3.7V/750mA
STEP-UP
ME2149
7533_3.3V
LDO
KEY
REGULATOR
SWITCHING
FW3717
SPEAKER
4 ohm 4W
chargi
ng
LE
D
VR
Data
TDA7491
lo
w
po
w
er
LE
D
SLIDE SWITCH
charging
AT6009
Audio Limiter
D2761
USB
K
A
K
A
BL
U
ET
O
O
TH
_L
ED
Summary of Contents for BT2500B/W-00
Page 27: ...3 2 WIRING DIAGRAM ...
Page 30: ...5 1 TOP BOARD LAYOUT ...
Page 31: ...5 2 BOTTOM BOARD LAYOUT ...
Page 32: ...6 1 Exploded drawing 7 3 2 1 5 SPK 9 4 6 8 7 ...