Clear-Com ICS-24, Instruction Manual

Page: 23 / 30

I C S - 2 4 H E A D S E T S T A T I O N
4 - 7
Figure 5: ICS-24 Schematic (identical to the MR-202/MR-204)
D8 BA
V99
R1B 100K*
R1D 100K*
P6
D6
Green
C33 .01uF
R7B 10K*
S3
R24 470K
C7
470pF
C6
.01uF 1.4KV
C8 4.7uF
+
C15
.047uF
C10 4.7uF
R15 430*
IC2A LM833
+ -
C23
22uF
+
IC1A LM833
+ -
R33 10K*
JP1
C29 10uF
+
C27 100uF
+
R5 22*
IC5 7805L
C30 1uF
+
D3 BA
V99
C26 .1uF
R34 390
C12 .22uF
C9
.1uF
R35 300*
R2A 47K*
R2B 47K*
C2 47pF
D12
R6 220K*
R14 2.7K*
R8 1.5K*
Q6
MMBT
A14
C34 .47uF
+
D7 5.1V
IC1B LM833
+ -
D9 BA
V99
R7A 10K*
Q2
MMBFJ175
P1
P3
W2
W1
W4 W3
P4
S1
C21
.1uF
R7C 10K*
R1A 100K*
J1
R37 1M*
C24 22uF
+
R4D 470K*
R25 20K*
R2D 47K*
C17 .0047uF C14 .0022uF
R9 1.3K 1/2 W
S2
D5 5.1V
IC2B LM833
+ -
R23 100K*
R20 20K*
D13 BA
V70
P2
IC4 PIC16C505
R19 5K POT
R21 39*
C13 1uF
+
R31 825*
R13 6.8K*
C16 47pF
C18 .22uF
R17 2K*
R1
1
220
R12 15K*
D1 BA
V99
R18 1K*
R16 12.1K*
C19
.047uF
R27 120K*
R26 6.2K*
C1
1
22pF
C5 .0047uF
R2C 47K*
C22 220pF
Q1
MMBFJ175
R4B 470K*
C31 .47uF
+
C32
.01uF
Q5 MMBT
A64
Q3
MMBT2907A
R4C 470K*
R4A 470K*
JB1
Q4 MMBT2222A
J3
R7D 10K*
C20 22pF
R36 8.2K*
P5
R3C 47K*
C28 .01uF
D10
D1
1
R3D 47K*
C4 470pF
R3A 47K*
JB2
R3B 47K*
IC3B LM833
+ -
IC3A LM833
+ -
R29 100*
R22 100*
R30 5K POT
C3 1uF
+
R28 20K*
R1C 100K*
D4 BA
V70
Bias-1
+V1
+V1
Bias-1
Bias-1
Bias-1
Bias-1
+V1
+V1
+V2
+V2
Bias-1
+V2
+V2
+V2
+V2
+V2
VDD
VDD
VDD
VDD
+V1
+V1
VDD
Bias-1
+V1
+V1
1
2
3
2 7
4 5
1 2 3
2 7
2
1 3
5
4 6
3 2
1
8 4
3 2
1
8 4
VIn
3
VOut
1
GND
2
1 2
3
1 8 2 7
1 3
5 6
7
1 2
3
1 8
3
2 1
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8
1 2
1 2 3 4 5 6
7 8 9
10 11 12
3
6
1 8
1 2 3 4 5 6 7 8 9
10
4
5
4 5
2
1 3
5
4 6
1
3
5 6
7
1
2
3
1 2 3 4 5 6
RB0
13
RB1
12
RB2
11
RB3
4
RB4
3
RB5
2
RC0
10
RC1
9
RC2
8
RC3
7
RC4
6
RC5
5
VDD
1
VSS
14
3 1
2
1 2
3
3 6
3
2 1
2 7
2
1
3
3
6
1 8
1
2
3
1
2
1 2 3 4 5 6 7 8
4 5
1
2
3
4
5
6
7
3 6
4
5
1
8
1
2
2
7
5 6
7
3 2
1
8 4
3 1
2
3 6
1 2
3
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
SP
ARES:
PREAMP
LONG LINE
CHANNEL SELECT
OR
SIDET
ONE
NULL
4-WIRE OPTION (1)
INTERCOM CHANNEL(S)
INTERCOM VOLUME
CW
INTERCOM LINE RECEIVER
INTERCOM LINE DRIVER
CW
TW POWER OPTION
4-WIRE OPTION (2)
CALL LIGHT
CALL SIGNAL
T
ALK
PROGRAMMING /
TEST
INTERF
ACE
1 - Gnd / Gnd 2 - Data / Strobe 3 - n/a / Data Out 4 - Clock / Clock 5 - MCLR (not) / Data In 6 - +5V / n/a
CALL
LA
TCH
DISABLE
A A
B B
C C
D D
E E
4
4
3
3
2
2
1
1