A
B
C
1
2
3
4
5
SP-PW880
2-1
+
+
-
-
L
V
A10058-A2
66-000-074-11
L
V
A10058-A1
L
V
A10058-A3
67
IC811
IC813
2/2
57
IC813
2/2
31
IC811
Q8101
Q8102
IC851
Q8501
Q8502
1/2
57
IC812
2/2
31
VR811
-VH
CN811
CN821
CN881
IC812
IC821
Q8204
R
Y881
1/2
S8101
18
14
Q8201
Q8202
Q8203
SP-PW880
Block diagram
Input L/H amp
LED control
Regulator
(5V)
Regulator
(9V)
CN851
CN861
CN891
P
o
w
er circuit
DC detector
High path
filter
P
o
w
er amp
Output current
detector
Rela
y
Speak
er
Lo
w path
filter
Buff
er
SW
