Sony CDX-3900R Service Manual page 38

QQ
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IC7 LA6556L-TE-L
FWD
1
INPUT
REV 2
VCC2
3
VL0–
4
CONTROL
VL0+
5
VO4+ 6
VO4–
7
VO3+
8
VO3–
9
VO2+
10
VO2–
11
TE
L 13942296513
VO1+
12
VO1– 13
VCC1
14
VIN1
15
VIN1–A
16
AMP-A
–
+
VIN1+A 17
VIN1–B
18
–
+
AMP-B
IC671 BA4908-V3
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–
+
.
2 3 4
1
38
http://www.xiaoyu163.com
CH2-CH4 OUTPUT
MUTE2
ON/OFF
CH1 OUTPUT
MUTE1
ON/OFF
OUTPUT
LEVEL
SHIFT
VIN1/VREF SW
LEVEL
SHIFT
–
+
5V REG
+
–
LEVEL
SHIFT
LEVEL
SHIFT
–
+
REGULATOR
OVER VOLTAGE
PROTECT
x ao
y
i
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http://www.xiaoyu163.com
8
GND
36
S-GND
35 MUTE2
34 MUTE1
33 VIN4
32 VIN4–
+
–
31 VIN4+
30 VREF-IN
29 VIN1 (VREF)-SW
28 VREF-OUT (CH1)
27 REG-OUT
26 REG-IN
Q Q
3 6 7 1 3
25 VIN3+
+
–
24 VIN3–
23 VIN3
22 VIN2+
+
–
21 VIN2–
20 VIN2
19 VIN1 +B
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.
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2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9