Symetrix 425 - Page 46

OF
COMPANY:
SYMETRIX INC.
4211 24th Ave W
SEATTLE, WA 98199
TITLE:
DRAWING NO:
REV:
SHEET:
DATED:
DATED:
DRAWN:
RELEASED:
CH1 EXPANDER SIDE CHAIN
EXPANDER
THRESHOLD
(FRONT PANEL)
COMPRESSOR
THRESHOLD
CH1 COMPRESSOR
425 DUAL COMP/LIMITER/EXPANDER
022001-SCH
E2
2
(BYPASS)
7
CHANNEL 1
RELEASE
RELEASE
RATIO
SIDECHAIN
IN/OUT
CHANNEL 1
LOG CONVERTER
TRIM
(FRONT PANEL)
(FRONT PANEL)
(FRONT PANEL)
(FRONT PANEL)
CHANNEL 1
IN/OUT
(SHOWN IN)
(SHOWN IN)
7
6
8
U5B
MC3346P
3
2
15
4
U5A
MC3346P
3
+
2
-
1
U6A
RC4560
R24
10K0
R25
2K2
5
+
6
-
7
U6B
RC4560
R26
10K0
C10
22pF
R27
100 OHM
R28
82K
CW
3
1
2
R29
100K
10
9
11
U5C
MC3346P
D2
1N4148
R30
200K0
13
12
14
U5D
MC3346P
R14
1M
R17
2K7
+
C9
10/35
+
C11
3.3/25t
3
+
2
-
1
U3A
RC4560
D1
1N4148
R18
200K0
R19
6K98
R20
560K
R21
1M5
CW
3
1
2
R22
50KB
3
+
2
-
1
U21A
RC4560
R42
30K1
R43
1K00
R44
158K0
CW
3
1
2
R46
50KB
5
+
6
-
7
U21B
RC4560
+
C15
4.7/50
+
C16
10/35
R51
2K2
R52
10M
R53
10K0
R54
10K0
D13
1N4148
CW
3
1
2
R55
50KB
D14
1N4148
R31
75K
5
+
6
-
7
U3B
RC4560
R32
4K7
R33
10M
R34
2M0
D3
1N4148
R35
10K0
3
+
2
-
1
U4A
RC4560
R36
20K
R37
2K7
C12
.22uF
R38
1M
C13
22pF
D4
1N4148
R39
1K00
Q5
2N4401
D5
1N4148
D6
1N4148
R40
10K0
CW
3
1
2
R41
500KA
D7
1N4148
+
C14
3.3/25t
+
C57
4.7/50
R166
2K2
R167
10M
5
+
6
-
7
U4B
RC4560
3
+
2
-
1
U12A
RC4560
R168
10K0
R169
10K0
C58
22pF
5
4
6
SW4B
R170
100 OHM
D15
1N4148
8
9
7
SW4C
R171
10K0
R172
150K0
CW
3
1
2
R106
500KA
R56
30K
R45
2K00
R47
13K0
+
C45
4.7/50
3
+
2
-
1
U11A
RC4560
R48
1M
C46
22pF
D9
1N4148
R50
200 OHM
D10
1N4148
R113
2K2
C50
.22uF
R115
3K3
+
C52
33/35
R49
6K2
3
2
15
4
U28A
MC3346P
13
12
14
U28D
MC3346P
+15VA
-15VA
-15VA
-15VA
+15VA
+15VA
-15VA
-15VA
-15VA
+15VA
+15VA
-15VA
-15VA
-15VA
-15VA
-15VA
-15VA
S/C_IN_CH1
CH1_CTRL
EXPLEDS_CH1
COMPLEDS_CH1
PEAK_DET_CH1