Page 1
65 4 3 2 1
REVISION RECORD
REV
C5
REVISIONS DONE OR ECO NUMBER:
DATE:
D
C
B
A
LEFT MUSIC
INPUT
J3-1
+
J3-2
-
GND
J3-3
RIGHT MUSIC
INPUT
J3-4
+
J3-5
-
J3-6
GND
LEFT
UNBAL
INPUT
RIGHT
UNBAL
INPUT
J2
RCA_TWIN_LP
1
GND
1K00
1K00
R16
1K00
R17
1K00
2
3
L
R1
R2
100pF
R
100pF
SIG2
C1
C3
SIG1
CHG5
CHG5
L
R
C2
100pF
C4
100pF
R3
9K09
R4
9K09
R18
9K09
R19
9K09
2
3
R6
10K0
R21
10K0
10K0
+
6
5
47pF
R5
U1A
1
NJM2068M
C6
47pF
C8
47pF
R20
10K0
U1B
+
NJM2068M
C9
47pF
7
C7
4.7/NP
+15V
CW
3
R9
50K
1
-15V -15V
C10
4.7/NP
+15V
CW
3
R24
50K
1
-15V
R7
20K0
R10
2
499K
R22
20K0
R25
2
499K
18
18
R8
61.9
37
EC1
IN
S
V
E
Y
E
C
M
E
2
4K99
R12
R11
51.1
R13
61.9
R23
61.9
37
EC1
IN
S
V
E
Y
E
C
M
E
2
R27
4K99
R26
51.1
-15V
R28
61.9
+15V
VCC
OUT
G
N
D
+15V
VCC
OUT
G
N
D
C11
100pF
R15
13K0
C12
4.7/NP
C14
4.7/NP
DATED:
6254
2K00
6254
R29
2K00
2150A
R14
2150A
U2
U3
DRAWN:
2
-
3
+
CV
[SH1 A3,
SH3 B2]
100pF
6
-
5
+
CV
[SH1 C3,
SH3 B2]
1
U4A
NJM2068M
C13
R30
13K0
7
U4B
NJM2068M
ba 11-11-98
RELEASED:
DATED:
L_MUSIC
[SH2 D6]
R_MUSIC
[SH2 C6]
COMPANY:
TITLE:
DRAWING NO:
+15V
C15
U1C
NJM2068M
8
4
-15V
.1uF
NJM2068M
C16
.1uF
U4C
8
4
SYMETRIX INC.
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
306 DUCKER - MUSIC IN & VCA
SHEET:
C17
.1uF
C18
.1uF
1
REV:
OF
D
C
B
A
A
5
Page 2
D
C
B
A
L_MUSIC
[SH1 C2]
R_MUSIC
[SH1 B2]
PAGE
[SH3 D6,
SH4 B1]
NJM2068M
U5C
23456
SEE SHEET 1 FOR REVISIONS
U6A
C19
MAX PAGE
R31
4K99
1
MAX MUSIC
R32
4K99
50K
R33A
CW
6
4
R34
4K99
2
-
3
+
NJM2068M
22pF
R35
20K0
U5A
R36
24K9
C21
1
47/NP
10K0
R136
R38
3K01
1
R37A
50K
CW
6
4
MASTER GAIN
C20
3
R33B
50K
R47
4K99
1N4148
U6C
D1
5
CW
8
4
2
R46
4K99
R49
4K99
R135
10K0
+15V
C32
8
4
.1uF
C33
.1uF
4580_SMD
-15V
R48
4K99
P_CLIP
C34
.1uF
C35
.1uF
4580_SMD
6
5
U7C
22pF
R50
20K0
+
U5B
NJM2068M
8
4
C22
7
47/NP
C36
.1uF
C37
.1uF
10K0
R137
R51
24K9
2
R52
3K01
R37B
50K
CW
5
3
4580_SMD
3
+
2
-
2
-
3
+
U6B
4580_SMD
5
+
6
-
6
-
5
+
R39
24K9
C23
22pF
R40
4K99
C24
22pF
R41
4K99
R53
24K9
C27
22pF
R54
4K99
C28
22pF
R55
4K99
U7B
4580_SMD
1
1
U7A
4580_SMD
7
7
R42
402
R43
402
R56
402
R57
402
R134
10K0
R44
402
R45
402
R60
10K0
R58
402
R59
402
CHG6
CHG6
CHG6
CHG6
C25
100pF
L2
C26
100pF
C29
100pF
L4
C30
100pF
L1
L3
CHG6
D2
1N4148
D3
1N4148
CHG6
COMPANY:
TITLE:
DRAWING NO:
J5-2
LEFT OUT -
J5-1
LEFT OUT +
J5-3
GROUND
P_CLIP
J5-5
RIGHT OUT -
J5-4
RIGHT OUT +
J5-6
GROUND
R63
200K
R61
200K
C31
.1uF
SIG1
SIG2
R62
3K48
J4
RCA_TWIN_LP
2
3
SYMETRIX INC.
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
306 MIX & OUTPUT
1
+15V
Q1
2N4401
R64
4K99
UNBAL OUT
LEFT
RIGHT
1
GND
SHEET:
Q2
2N4403
R65
2K00
CLIP
D4
LED_T1_R_FORM
REV:
A
OF
2
5
D
C
B
A
Page 3
+15V
23456
SEE SHEET 1 FOR REVISIONS
1
D
C
B
A
PAGE
[SH2 B6,
SH4 B1
D5
1N4148
D10
1N4148
C38
.047uF
R66
20K0
2
3
Bandpass 170-3500 Hz
R83
402
C45
4.7/NP
R89
402
D11
1N4148
D12
1N4148
1N4148
D6
D7
1N4148
+15V
HOLD GATE SIDECHAIN
2N4401
C46
4.7/NP
HOLD
D13
1N4148
-15V
C39
.0022uF
R67
20K0
+
U8A
NJM2068M
10K0
Q4
3
1
C40
1
4.7/NP
Q3
2N4401
R84
3
1
RELEASE
CW
2
R90A
50KB
R91
3K01
10K0
CW
2
R85A
50KB
R86
6K49
D14
1N4148
D15
1N4148
R68
R69
22M
-15V
D8
1N4148
D9
1N4148
R92
10K0
R70
10
-15V
C41
.47uF
10
R71
R87
20K0
U10D
LM324_SMD
13
-
12
+
R93
2K00
-15V
R88
20K0
R94
2 M
R72
2 M
6
CAP
1
IN
SYM5VEE2BIAS3GND
4
C42
.1uF
-15V WHEN PAGING
SIGNAL PRESENT
14
R73
1K00
8
VCC
7
OUT
U9
THAT2252
R74
499K
D_LED
U8C
NJM2068M
C43
4.7/NP
+15V
8
4
-15V
1K00
R77
R138
499K
R75
1K00
UNUSED SECTION
C47
.1uF
C48
.1uF
+15V
R78
124K
-15V
10
9
6
-
5
+
NJM2068M
LM324_SMD
R76
2 M
U10A
LM324_SMD
3
+
2
-
2
1
R79A
50KB
THRESHOLD
U10C
LM324_SMD
+
8
-
7
U8B
U10E
4
11
+15V
D
7
-15V
10K0
R81
C44
.1uF
49K9
R80
LED_T1_Y_FORM
R133 TRIMS FOR
UNITY LINE GAIN
D17
21
CV
Q5
2N4403
R82
1K00
DUCK
[SH1 A3,
SH1 C3]
C
B
HIGH WHEN
ABOVE THRESHOLD
1
+15V
3
CW
50KB
R96A
C49
.1uF
CW
3
1
2
DEPTH
R97
49K9
COMPANY:
R95
61.9
6
5
D_LED
C51
.1uF
R98
49K9
U10B
+
LM324_SMD
R133
9K09
SYMETRIX INC.
C50
.1uF
TITLE:
DRAWING NO:
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
306 SIDECHAIN
SHEET:
REV:
A
OF
35
A
Page 4
23456
1
D
C
B
A
PAGE MIC IN
1
4
CHG5
+15V
J1
C53
470pF
2
3
R120
100
L5
L6
C68
4.7/NP
R99
10
C52
100pF
100pF
C54
R100
10
S1A
1
12
NC
3
NC
10
2
11
S1D
PHANTOM POWER
R101
4K99
R102
4K99
R104
51.1
MIKE/LINE
R103
2K49
S1C
9
7
4
6
8
5
S1B
R105
2K49
C69
.1uF
C70
.1uF
C56
+
100/35
C58
+
100/35
U11C
NJM2068M
C57
100pF
R106
2K49
R107
2K49
8
4
R108
4K64
Q6
2N4403
R109
649
R110
1K69
C71
.1uF
U12C
C72
.1uF
Q7
2N4401
+15V
8
4
-15V
+15V
R111
86.6
Q8
2N4401
-15V
4580_SMD
R112
4K64
2N4403
R113
649
R114
1K69
R121
4K99
Q9
C59
100pF
C60
47pF
3
2
4580_SMD
U12A
+
-
R122
4K99
R123
4K99
22pF
6
-
5
+
4580_SMD
COMPANY:
TITLE:
DRAWING NO:
C66
U12B
2
-
3
+
NJM2068M
R116
4K64
1
7
C61
47pF
R115
4K64
U11A
SEE SHEET 1 FOR REVISIONS
1
R124
402
R125
402
R126
402
R127
402
C62
4.7/NP
R117
10K0
L7
C65
100pF
CHG6
L8
C67
100pF
CHG6
5
6
C63
22pF
R118
4K99
C64
47/NP
U11B
NJM2068M
+
7
50K
R119
CW
1
3
2
PAGE LINE OUT
CHG6
SYMETRIX INC.
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
306 PAGE AUDIO PATH
PAGE
GAIN TRIM
J5-7
+
J5-8
-
J5-9
GND
SHEET:
PAGE
[SH2 B6
SH3 D6]
REV:
A
OF
45
D
C
B
A
Page 5
23456
SEE SHEET 1 FOR REVISIONS
1
D
C
AC POWER IN
CON
CHG6
J6
DIN7_RA_PCB
8
9
D
+15V
U13
6
NC
1
NC
4
2
5
3
7
R130
0 OHM
L9
L10
L11
C73
.01
C74
.01
C75
.01
D18
1N4003 SMD
D19
1N4003 SMD
D20
1N4003 SMD
D21
1N4003 SMD
+
+
C76
1000/35
C77
1000/35
AA
78M15
1
VIN
GND
GND
2
VIN
79M15
U14
VOUT
2
1N4003 SMD
1N4003 SMD
1
VOUT
3
C78
D22
D23
3
R131
1K00
4.7/NP
C
C79
4.7/NP
-15V
B
A
CHG5
CHG6
NC
NC
1
1
1
1
H5
MH156
H6
MH156
H7
MH156
H8
MH156
R85B
50KB
56
R90B
50KB
BKT
HOLE_CUT_CLINCH
BKT
56
P2
R79B
R96B
50KB
50KB
BKT
BKT
56
56
HOLE_CUT_CLINCH
P1
R33C
50K
BKT
89
R37C
50K
BKT
89
HOLE_SMD_PASTEH2HOLE_SMD_PASTE
TP1-1
H1
F1
FIDUCIAL
F2
FIDUCIAL
POWER
R132
1K00
1
D24
LED_T1_R_FORM
2
COMPANY:
TITLE:
DRAWING NO:
SYMETRIX INC.
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
306 POWER SUPPLY & APPENDIX
SHEET:
55
B
A
REV:
A
OF
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