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LTR REVISION DATE
F REDRAWN WITH CHANGE 12-12-89
INCORP ECO
G EC0 528-001 3-3-93
PHANTOM CHANGED C8, C9, C33
POWER G1 EC0 528-4
R188 R191 NOW 3K65
7-7-93
OUT
1
R10
2
SW1A
3 +15
1K0 +48
C102
C1 IN
.01 C103
10/80
.047 MY
FB1 R23
10K
BEAD
+15 -15 Q1
Q2
D5 2N5210
5 4 R21 2N4403
C2 3
C105 D1 V V OUT
47/63 12 + -
.001 1N5232 +IN 100
R16 1N4148 R22 R25
J2
R11 R13 D2 10K0 1M0 1K5 D6
4K99 10K0 1N5232 U2 LED
11
C4 SSM2015 R
RED
330 pF CW C10 1 4
D3 N N .1 R24
R12
1N5232 9 U U MIC 8K2 J4
MIC C106 4K99 R14 -IN L L 10 R18 2 3
.001
10K0 C C L L C BR
2K5C GAIN
INPUT D4
6 7 8 1 1 1
C3 1N5232 3 4 CLIP
C8
R17
FB2 R15 56
BEAD 47/63 27K
C5 10 pF
R272 47 pF
C104 C9 R19
-15
100K0 10 pF 10K0
R271 C15
.047 MY OFFSET
TRIM 47 pF
R20 R27
100K TRIM R7 13K0 13K0
J1 R273
45K3 C96
100K0
+15
R3 R5
8 150 pF
LINE 2K10 43K2
2 R9 C11
1 6 R28 C17 TB1
INPUTS 2K00 R6
3
U1A 13K0
7 4 MIC/LINE
4.7 NP 5
R4 13K0 4 RC4560 U1B
RC4560
100
100/35 R29
OUTPUT
TB1 R1 R2 C16
- 2
100K 100K
C13
150 pF
R8
-15 100K
C14
+ 1 470 pF
470 pF
15K0
3
GND
SYMETRIX INC.
4211-24 TH AVE W.
SEATTLE WA. 98199
Title
SCHEMATIC 528
Size Document Number REV
B 191750 G
Date: July 7, 1993 Sheet 1 of 6
R69
13K0
R31 R64 C24
R65 +15
51K 13K0 13K0 82 pF
C18 C100 3 7
R47
13K0
DE-ESS
47 pF 5 P1 C20
.0056 MY
150 pF
E V
OUTPUT
C C +15
C22
C19 +15 R34 1 C
R30 6 4.7 NP U5 8 C25
4.7 NP R66 13K0 R48
TB1 8 R32 CW 6 13K0 7 1 A 2150 8 2 100/35 TB1
51K R33 IN OUT 100
5 2 5K1 2 5 5K1 7 5 1 6
1 6 1 3
4 6 4 5 U8B S V E G 3
U3B RC4560 Y E C N U4A
3
U3A RC4560 M E 2 D 4 RC4560
A1R1A A1R1B
DE-ESS 4 RC4560 50KC DUAL 50KC DUAL C21 +15
R49
100K
R67 -15
4 5 2 6
INPUT -15 DE-ESS .0027 MY
13K0 C101 R36
150 pF
FREQUENCY 300K
R35 R38
100K TRIM 51
R37
-15 R45
5K1
61.9 1%
-15
+15
DE-ESS
1
RANGE
DE-ESS PCB R40
U7D ASSEM#
R60 R63 61.9 1%
LM3046 305006DS CW 160K
A1R2 30K1
10 11 2
A1 50KB
9 R39
U7C D7 2K00
1N4148 D8
LM3046 1N4148
8 7
R62
3 1K00 +15
6 SW2A
-15 D9
8 1
C27 U7B 1N4148
R58 2 2
22 Pf LM3046 1 3
100
5 3 3
C26 R50
U6B U8A DE-ESS
.047 MY 6K98 4
LF353N R55 R59 RC4560 OUT
C28
6 2K2 4
1M0 3.3/35T
7 -15 DE-ESS
5 IN
R51 R56 R61
6
200K 10K0 1M0 5
U7A DE-ESS
+15 R57 4
LM3046 SW2B
10K0
1 3 -15
R53
R52
82K
+15 DE-ESS
100K TRIM 2
8 BYPASS
2
1
R54 3
-15 100 U6A
4 LF353N
-15
SYMETRIX INC.
4211-24 TH AVE W.
SEATTLE WA. 98199
Title
SCHEMATIC 528
Size Document Number REV
B 191750 G1
Date: July 7, 1993 Sheet 2 of 6
+15
C31
R77 3 7
82 pF
61.9 1%
TB1 E
C
V
C R89
1 C
COMP/LIM C29
R74
U10
13K0
D49
R109
7 1 A 2150 8
INPUT 13K0
IN OUT
+15
10K
CLIP
4.7 NP S V E G 1N4148
R73 Y E C N 8
100K M E 2 D 2 C42
R90 TB2
+15 1 1
4 5 2 6 3
100
COMP/LIM OUTPUT
C30 U9A 100/35
R41
OUTPUT 9 4 RC4560
R76 R91
R75
100 -15 R137
4.7 NP 100K TRIM
SIDE-CHAIN 300K R78
51
100K 49K9
10 C33 C32
INPUT R79 -15
4.7NP -15 R71
R80
5K1 1K00
61.9 1% .001 CW
R42 R43
R92 R95
100K 100K 6 50KB/1C
-15 7
5 470K
+15
U15B
LF353
OUTPUT
D13 D14 U14A
1N4148 1N4148 R111
8
LF353
LEVEL
3 +15
R119 R120
1
10K
R114 2
R112 C37 10K0 10K0
3M3 300K
U14B 4.7/35 4 R93
1K0
5 LF353 D15 D16 R110 -15 C41
R113 R118 100K0
7
R115
6
100 C38 3M3 10K0
1N4148 1N4148 D44 .001
D12 10/35
1N4148 1N4148
+15 OUT
+15 6
8 D21 5
C/L
3 2 1N4148 4
R105 -15 R116 R117 SW3B
1
3K83 47K 3 IN
30K1 U15A
CW 4 LF353
R108 A2R1 -15 BYPASS
2 50KB -15 (COMP/EXPAND)
150K
R106
U11D
1K00
EXPAND
LM3046
10 11 R107 THRESHOLD
750K +15
U11C
LM3046 9 D51 1 D17 D18 U13A
8 7 1N4148 1N4148 8
R127 LF353
-15 -15 3
1N4148 1
6 10K 2 D22
R128 1K0 R130
C34 C39 1N4148
R126 100K
U11B U13B 1/35T 4
LM3046 D20
LF353 1N4148 100K -15
22 Pf 5 3 5 R135
R129 R133
7
R131 50KB
6
U12B R103 R104 100 C40 1M0 10K0
4 D19
R94
6
LF353
R100
1M0 4K7
C36
D11 1N4148 +15 10/35
R132