Ssb: Audio Protection/Mute Control - Philips Q528.1E Service Manual

Circuit Diagrams and PWB Layouts

SSB: Audio Protection/Mute Control

1 2
AUDIO: PROTECTION/MUTE CONTROL
B11C
A
B
3D63
DC-SENSE
220K
VN
C
5
3D90-4
D
E
F
3104 313 6194.3
1 2
Q528.1E LA
3 4
+3V3-STANDBY
VP
3 7D00-1
ID70 ID87
3D90-1
1 8 9 LM339P
VP
ID86
14
22K
8
12
VN
GNDSND
VP
3 7D00-4
FD64
GNDSND
7 LM339P
1
ID73
22K
6
4
12
VN
GNDSND
VNN
7D63-1
BC847BPN
1
ID75
2
6
ID25
BC847BPN
7D63-2
ID79
ID80
VNN
3 4
7. 103
5 6
+3V3-STANDBY
2D73
10u
ID88
ID72
6D63
3D80
7D70
BC847BW
BAS316 100K
GNDSND
3D89
100K
VPP
VP
ID77
7D64-2
BC847BPN
4
ID78
5
3
ID82
6
ID84
3D76-4
2 5
7D64-1
BC847BPN
22K
1
GNDSND GNDSND
5 6
7 8
FD65
AUDIO-PROT
AUDIO-MUTE
MUTE
4
AUDIO-MUTE
GNDSND
GNDSND
7 8
2D72 B3
9
2D73 A5
2D74 F9
3D62 B3
B11C
3D63 B2
3D64 A6
3D71 C3
3D73 E5
3D74 D4
A
3D75 D5
3D76-1 D6
3D76-2 E6
3D76-3 F6
3D76-4 E7
3D78 D4
3D79 D4
3D80 A5
3D83 E4
3D89 C6
3D90-1 A3
3D90-2 A4
B
3D90-3 B5
3D90-4 C2
6D62 F4
6D63 A5
7D00-1 A4
7D00-4 C4
7D63-1 D4
7D63-2 E4
7D64-1 F6
7D64-2 E5
7D70 B6
C
FD64 C3
FD65 A7
ID25 E4
ID70 A3
ID72 A6
ID73 C3
ID75 D4
ID77 D5
ID78 E5
ID79 E4
ID80 F4
D
ID82 E6
ID84 E6
ID86 A4
ID87 A4
ID88 A5
cDA0 F9
E
RES
2D74
10n
F
cDA0
H_16800_078.eps
010507
9