Symetrix 528 Schematic
J2
MIC
INPUT
LINE
INPUTS
GND
+
C102
.01
FB1
BEAD
FB2
BEAD
J1
TB1
C105
.001
C106
.001
2
1
3
R11
4K99
R12
4K99
C1
10/80
.047 MY
47/63
.047 MY
100K
C103
47/63
C104
R1
PHANTOM
POWER
R10
1K0
C2
R13
10K0
R14
10K0
C3
2
R2
100K
1N5232
1N5232
1N5232
1N5232
R3
2K10
OUT
IN
1
SW1A
3
D1
D2
D3
D4
100K TRIM
2K00
R4
470 pF
C13
R271
+48
330 pF
OFFSET
TRIM
C4
R272
100K0
100K0
R6
13K0
C14
470 pF
R273
12
9
+IN
-IN
C
6
47 pF
R5
43K2
C16
150 pF
C5
C
V
+
7
5
SSM2015
N
U
L
L
2
3
R8
15K0
REVISIONLTR
REDRAWN WITH CHANGE F
INCORP ECO
EC0 528-001
G
CHANGED C8, C9, C33
EC0 528-4
R188 R191 NOW 3K65
+15
R23
10K
-15+15
4
V
-
U2
N
U
L
L
8
10 pF
10 pF
47 pF
R7
45K3
+15
8
4
-15
1
3
C15
C
1
C8
C9
1
U1A
RC4560
OUT
-15
3
R16
R9
13K0
10K0
CW
R18
2K5C
R17
56
R19
10K0
MIC
GAIN
C11
4.7 NP
11
R
10
R
B
1
4
R15
27K
R21
100
R20
13K0
D5
1N4148
R27
13K0
6
5
C10
.1
C96
150 pF
7
U1B
RC4560
2N5210
R22
1M0
R28
100
Q1
C17
100/35
R24
8K2
R29
100K
Q2
2N4403
R25
1K5
1 4
J4
TB1
4
D6
LED
RED
3 2
CLIP
MIC/LINE
OUTPUT
DATE
12-12-89
3-3-93
7-7-93G1
Title
SYMETRIX INC.
4211-24 TH AVE W.
SEATTLE WA. 98199
SCHEMATIC 528
REVDocument NumberSize
G191750B
6of 1Sheet July 7, 1993Date:
R69
13K0
DE-ESS
INPUT
100K TRIM
TB1
5
4.7 NP
.047 MY
R52
C19
C26
+15
-15
R30
51K
82K
R53
R54
100
R50
6K98
R31
51K
C18
47 pF
+15
8
2
3
-15
4
U3A
RC4560
R32
5K1
1
6
1 3
A1R1A
50KC DUAL
DE-ESS
5
P1
2
4 6
A1R1B
50KC DUAL
FREQUENCY
R64
13K0
C20
.0056 MY
7
U3B
R66
13K0
R67
13K0
+15
C21
6
5
RC4560
1
DE-ESS
CW
5
R33
5K1
4
.0027 MY
6
5
R65
13K0
C100
150 pF
U8B
RC4560
C101
150 pF
+15
E
C
2
2
R45
61.9 1%
7
V
C
C
OUT
2
8
G
N
D
6
3
3
E
IN
-15
C
1
U5
A 2150
V
S
E
Y
E
M
5
4
R38
51
R37
5K1
C22
4.7 NP
7
13K0
+15
-15
R34
1
R36
300K
R35
100K TRIM
+15
-15
82 pF
8
4
C24
R47
13K0
U4A
RC4560
DE-ESS
OUTPUT
R48
100
1
C25
100/35
R49
100K
TB1
6
RANGE
R51
200K
LM3046
LM3046
8 7
6
5
U7D
U7C
11 10
9
6
C27
22 Pf
U6B
LF353N
DE-ESS PCB
ASSEM#
305006DS
A1
D7
1N4148
U7B
LM3046
5 3
R55
R56
10K0
+15
-15
R57
10K0
8
4
2K2
1
U6A
LF353N
7
2
3
4
U7A
LM3046
1 3
2
A1R2
50KB
R58
100
R59
1M0
CW
3
-15
3.3/35T
2
1K00
C28
R62
R60
160K
R61
1M0
2
3
-15
D8
1N4148
+15
-15
R63
30K1
8
4
D9
1N4148
1
U8A
RC4560
R40
61.9 1%
SW2A
1
3
DE-ESS
OUT
DE-ESS
6
4
IN
SW2B
DE-ESS
BYPASS
2K00
2
5
R39
DE-ESS
SYMETRIX INC.
Title
4211-24 TH AVE W.
SEATTLE WA. 98199
SCHEMATIC 528
REVDocument NumberSize
G1191750B
6of 2Sheet July 7, 1993Date:
+15
C31
COMP/LIM
SIDE-CHAIN
+15
R99
100K TRIM
-15
INPUT
R98
82K
OUTPUT
INPUT
R94
6K98
200K 1%
R97
100
R96
TB1
7
9
10
R42
100K
U11C
LM3046
8 7
6
22 Pf
6
5
R73
100K
C34
U11D
LM3046
U12B
LF353
R101
10K0
9
7
R41
100
R43
100K
11 10
2
3
1N4148
+15
-15
8
4
D51
R100
2K2
R102
10K0
4.7 NP
C33
4.7NP
1
U12A
LF353
C30
U11B
LM3046
5 3
U11A
LM3046
1 3
R77
61.9 1%
C29
4.7 NP
100K TRIM
5
6
4
2
LF353
1N4148
R105
30K1
R106
1K00
-15
R103
1M0
-15
R75
U14B
D12
R107
+15
-15
7
750K
R74
13K0
R108
150K
R104
4K7
C35
10/35
1
R76
300K
D15
1N4148
2
1/35T
R122
1K00
IN
-15
1N4148
R112
1K0
1N4148
CW
C36
3
E
C
1
U10
A 2150
V
S
E
Y
E
M
5
4
R78
51
R79
5K1
D13
D16
+15
3
A2R1
50KB
EXPAND
THRESHOLD
1
-15
5
6
1N4148
R121
30K1
E
C
2
1N4148
U13B
LF353
-15
2
R80
61.9 1%
D14
3M3
R110
7
D11
R123
1M0
7
V
C
C
OUT
82 pF
R89
2
3
R71
1N4148
D19
1N4148
5
+15
-15
13K0
8
4
C37
4.7/35
C38
10/35
-15
D17
1N4148
1
U9A
RC4560
1K0R128
D20
+15
R114
300K
R115
3M3
R116
3K83
4
A2R2
50KB
COMP
R90
100
+15
3
2
-15
D44
1N4148
D18
1N4148
R126
100K
COMP/LIM PCB
305006CLCW
R129
100
ASSEM#
100/35
8
4
-15
R127
10K
A2
C42
U14A
LF353
1
R118
10K0
R117
47K
8
G
N
D
6
1K00
R111
10K
R113
100
R124
137K
THRESHOLD
6
-15
1N4148
1
R137
100K
1/35T
10/35
-15
C39
C40
D49
R109
10K
TB2
COMP/LIM OUTPUT
R119
10K0
R130
100K
R131
1M0
D45
1N4148
R120
10K0
C41
.001
+15
8
2
3
-15
1
U15A
4
LF353
+15
8
3
2
4
-15
R132
9K09
Title
CLIP
1N4148
U13A
LF353
1
R133
10K0
7
U15B
LF353
D21
R91
49K9
C32
.001
6
5
1N4148
R135
50KB
R92
470K
D22
COMPRESS
RATIO
SYMETRIX INC.
4211-24 TH AVE W.
SEATTLE WA. 98199
SCHEMATIC 528
-15
CW
+15
R93
100K0
OUT
6
4
SW3B
IN
BYPASS
(COMP/EXPAND)
R95
50KB/1C
OUTPUT
LEVEL
5
C/L
REVDocument NumberSize
G1191750B
6of 3Sheet July 7, 1993Date:
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