magnum S-3, S-6, S9, S-3NX, S6NX Schematic
...
J12
C8 1uF > 0.1uF
Cancel C14
REMARKS:
* C8 Changed to 0.1uF E.Cap.
* C14 - 224 Deleted
Above changes for better performance.
All Right Reserved By Goodwill Telecom
1
2
3
J4
1
+13.8V
2
J5
1
2
R1 100
J1
1
2
3
J2
1
2
3
R27
4.7K
J3
1
2
3
4
5
6
C48
104
GND1
PA
PO
D
C
B
A
ECHO ON/OFF
C33
104
J14
7PIN
POWER+
POWER-
AUDIO O/P
PTT
AUDIO I/P
ECHO LEVEL
50KA
50KB
ECHO DELAY
EXT Speaker
7
6
Radio PTT
5
Radio Audio Amp
+13.8V
4
AUDIO-IN
3
2
1
GND1
RELAY
D4
1N4148
R26
4.7K
R25
4.7K
Radio PTT
AUDIO-IN
R5
4.7K
C31
472
R12
30K
D1
1N4148
IC3
78L05
1
C1
22u/16v
* See Remark C8
1UF/25V
C5
1u/50v
R43
180R
Vin
R4
22K
VR2
50K
C28
104
C29
104
GND
2
C47
470UF/16V
Vout
R3
22K
5
6
GND1
150K
C10
471
R23
120K
C30
R22
103
OUT5VCC
100u/16v
C11
1u/50v
GND1
IC4
TA820M
C3
47u/16v
47K
C6
C7
223
C43
470UF/16V
GND1
TR1
C945
R2
220
3
IC1B
LM358
8
C4
104
4
R6
C9
472
R13
1K
47UF/16V
GND1
C45
470P
C46
104
R42
1R
7
C44
C15
104
R28
10K
R7
15K
SET ECHO DELAY
R41
56R
8
R40
220R
C42
100UF/16V
R24
100
C2
D2
223
12V
R21
3.3K
C49
473
R11
3K
VR1
10K
C27
472
7
6
Filter
VCC1
Gain1IN-2IN+3GND
4
GND1
GND1
P5
R19
100K
D3
1N4148
C21
103
C13
103
C41
R39
102
10K
GND1
IC1A
LM358
3
2
TR2
C945
C19
47u/16v
C20
104
12
13
14
1
2
3
C12
102
R8
10K
R10
R9
33
15K
C40
220UF/16V
GND1
J13
1
2
3
3PIN
R37
4K7
M104
11
IC2
M65850P
4
C16
M104
GND1
C22
R14
20K
10
5
C17
0.47u/50v
GND1
1
C37
102
R17
15K
GND1
0.22UF/50V
R16
75K
R18
100K
C32
471
C24
102
9
6
C18
0.47u/50v
C39
104
C36
C26
104
D
R15
15K
R20
22K
7 8
R38
1K
R36
1K
2SC945
C23
103
* See Remark C14
224
R35
4K7
TR3
GND1
C34
0.22UF/50V
R33
10K
1u/50v
GND2
R34
1M
C35
470P
C25
C
B
C38
10UF/16V
GND1
A
Title
Integrated Echo and Talkback Board
Number RevisionSize
A3
Date:
24-Nov-2003 Sheet of
File:
Magnum_EchoTB_SCH_0319_1
11
Drawn By:
LYG
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