Clear-Com ICS-22 - Manual (Page 33)

Vitec Group Communications
ICS-22 Speaker Panel Instruction Manual 4 - 1 3
Figure 4-5: VOX Schematic (part no. 710472)
A A
B B
C C
D D
E E
4
4
3
3
2
2
1
1
D1 5.1V
1N5231B
C5 680pF
C12 4.7uF 16V
+
R13 4.7K
D7 1N4148
C6
.01uF
D6 1N4148
D8 1N4148
R1 4.7K
D5
1N4148
D4 1N4148
C1
1
220uF
+
C10 470pF
R9D 100K X 4I R9C 100K X 4I
C13 1uF NP
R9B
100K X 4I
R9A
100K X 4I
R15 100K*
C8
4.7uF 16V
+
IC2B LF353
+ -
IC2A LF353
+ -
Q1 2N2222A
Q2 2N2222A
R16 4.7K
R1
1
100K*
D9 10V 1N4740A
D2 5.1V 1N5231B
R5 50K POT
R4 1M
R2 6.8K
R3E 10K X 5I
R8 1M
R3C 10K X 5I
C2 .1uF
R3A 10K X 5I
IC1B LF353
+ -
R10A 10K X 5I
R3B
10K X 5I
C9
.01uF
R3D 10K X 5I
R10D 10K X 5I
R10B 10K X 5I
R6 1.5K
R10C 10K X 5I
R17 4.7K
C3 .1uF
C4 .022uF MONO
R10E 10K X 5I
P1
C14 22uF T
ANT
+
R12 4.7K
IC1A LF353
+ -
C1 .1uF
R14 20K
P2
S1
D3 1N4148
Bias-2
Bias
+V1
Bias
Bias
+V1
VDD
VDD
Bias-2
VDD
Bias-2
+V1
Bias-2
+V4
+V1
+V4
+V1
7
8 5
6
3 4
1 2
5 6
7
3 2
1
8 4
3
1
2
9 10
5
6
1
2
5 6
7
1 2
3 4
7 8
7 8
3
4
5 6 9 10
1 2 3
3 2
1
8 4
+ 1 + 3 +
5 +
7 + 9 + 11 + 13
+ 2 + 4 +
6 +
8 + 10 + 12 + 14
2
1 3
5
4 6
NOTES: (UNLESS OTHER
WISE SPECIFIED)
1.
ALL
RESIST
ORS
ARE 1/10W 5% LISTED IN OHMS
2.
ALL
CAP
ACIT
ORS
ARE LISTED IN MICROF
ARADS
3.
ALL
DIODES
ARE 1N4148
P ANEL MIC
P
ANEL
MIC
HEADSET
ANTI VOX
VOX
CW