Pioneer XW-HTP550 Service Manual page 44

1
LA4663 (MAIN ASSY : IC3302)
A
• POWER IC
Blockdiagram
+5V
B
C
D
Pin Function
No. Pin Name I/O
1 RF O
2 R IN I
−
3 GND A
E
4 L IN I
5 STANDBY I
6 MUTE I
−
7 VCC1
−
8 VCC2
9 L+OUT O
−
10 GND P
11 L- OUT O
12 R- OUT O
−
13 GND P
F
14 R+ OUT O
44
1
2
+5V
5
STAND BY
SIGNAL
R1
MUTE
22kΩ
6
+
C4
–
10uF
10V
C1
4.7uF
10V
IN1
2
– +
Ri=
20kΩ
Input Amplifier
PRE
GND
3
C2
Input Amplifier
4.7uF
10V
IN2
4
– +
Ri=
20kΩ
Ripple Filter/
Starting Time
1
+
C3
– 47uF
25V
RF connection
R ch Audio data input
Ground A
L ch Audio data input
Standby input
Signal Mute Input
Power supply 1
Power supply 2
L ch + Amplifier Output
Ground P
L ch - Audio data Output
R ch - Audio data Output
Ground P
R ch + Amplifier Output
2
3
7 8
CC 1 V V CC 2
CH 1
+OUT1
+
Output Amplifier
PWR
GND1
–
–OUT1
+OUT2
+
PWR
Output Amplifier
GND2
–
–OUT2
CH 2
Pin Function
XW-HTP550
3
4
V
CC
+
C5
– 2200uF
25V
C6
RL=4~8Ω
0.1uF
14
R2
2.2Ω
13
R3
2.2Ω
12
C7
0.1uF
C8
RL=4~8Ω
0.1uF
9
R4
2.2Ω
10
R5
2.2Ω
11
C9
0.1uF
4