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6 5 4 3 2 1
REVISION RECORD
REV REVISIONS DONE OR ECO NUMBER: DATE:
C5
D LEFT MUSIC
L 47pF
R5 C11
D
INPUT 10K0 R8 +15V
R1 R3
61.9 100pF
+ J3-1
1K00 9K09 2 U1A C7 R15
- 1
3 3 7
+ 13K0
R2 R4 NJM2068M 4 . 7 / N P EC1 VCC
R7
- J3-2 1 8 2 C12
1K00 9K09 IN OUT - 1
20K0 3 L_MUSIC
C1 C2 +15V S V E G +
C6 Y E C N U2 U4A 4.7/NP [SH2 D6]
100pF 100pF M E 2 D
R6 47pF 2150A NJM2068M
GND J3-3 10K0 4 5 2 6
CW
3
R9 R10
2
50K 4K99
R12
C CHG5 499K
C
1
C8 R11
51.1 R14
-15V -15V CV
R 47pF 2K00 [SH1 A3,
RIGHT MUSIC R20 SH3 B2]
INPUT R16 R18 R13
10K0 61.9
+ J3-4
1K00 9K09 6 U1B C10
- 7
5
+ C13
R17 R19 NJM2068M 4 . 7 / N P
- J3-5
1K00 9K09 R23
+15V 100pF
61.9
C3 C4
C9 R30
100pF 100pF +15V
R21 47pF 3 7
GND 10K0
B J3-6
R22
1
EC1 VCC
8 6
13K0
C14
B
IN OUT - 7
20K0 5 R_MUSIC
CHG5 +15V S V E G + C15 C17
J2 Y E C N U3
U4B 4.7/NP [SH2 C6] .1uF .1uF
RCA_TWIN_LP M E 2 D 2150A 8 8
NJM2068M U1C U4C
4 5 2 6
CW
NJM2068M NJM2068M
LEFT SIG1
3
4 4
2 R25
UNBAL L R24 C16 C18
2
R27
50K 4K99 .1uF .1uF
INPUT 499K
1
R26
51.1
R29
RIGHT 3 SIG2 -15V
R -15V CV
UNBAL -15V 2K00 [SH1 C3,
COMPANY:
INPUT SH3 B2]
SYMETRIX INC.
GND
14926 35th Avenue West
A A
1
R28
61.9
Lynnwood, WA 98037-2303 USA
TITLE: REV:
DRAWN: DATED:
306 DUCKER - MUSIC IN & VCA A
ba 11-11-98 DRAWING NO:
RELEASED: DATED:
SHEET: 1 OF 5
6 5 4 3 2 1
SEE SHEET 1 FOR REVISIONS
U6A
4580_SMD
C19
3 R42 L1
+ 1 +15V
22pF
2 J5-2 LEFT OUT -
D MAX PAGE MAX MUSIC R35 R37A
50K CW
-
R39
24K9
402
C25 D
100pF
R36 6 J5-1 LEFT OUT +
20K0 24K9 1 R43
4 R63
C23 Q2
R31 R32
2 C21 402
CHG6
J5-3 GROUND 200K 2N4403
L_MUSIC - 1
[SH1 C2] 4K99 4K99 3 22pF
+ R38
47/NP R40
U5A 3K01
50K CHG6
NJM2068M Q1
R33A CW R34 4K99 P_CLIP
10K0
R136 C24 2N4401
1 6 R44 L2
4 4K99
402 R61 R62
MASTER GAIN 22pF
C26
D2
200K 3K48
R41 100pF R65
R45 1N4148 2K00
C20
C 4K99
402
D3
C31
.1uF C
R48 2 R60 CHG6
3 22pF - 1 1N4148 R64 CLIP
5 R50 3 4K99
2 4K99 + U7A 10K0
R33B CW D4
50K 4580_SMD LED_T1_R_FORM
20K0
R46 R47 U6B
6 C22 R51
R_MUSIC - 4580_SMD
7 5 R56 L3
4K99 4K99 5 + 7
[SH1 B2] + J5-5 RIGHT OUT -
24K9 6
47/NP R37B - 402
U5B R53
NJM2068M 50K CW 24K9 C29
5 100pF
R49
10K0
2
J5-4 RIGHT OUT + J4
R137 3 R57
PAGE C27 RCA_TWIN_LP
4K99
UNBAL OUT
[SH3 D6, 402 J5-6 GROUND
CHG6 SIG1
SH4 B1] R134
R135 D1 22pF 2 LEFT
R52
P_CLIP
B 10K0 1N4148
3K01 R54 10K0
CHG6 B
4K99
C28 R58 L4
SIG2 3
RIGHT
402
22pF
C30
R55 100pF
GND
1
R59
4K99
+15V 402
6 CHG6
- 7
5
+ U7B
4580_SMD
COMPANY:
NJM2068M
U5C 8
C32
.1uF
4580_SMD 8
U6C
C34
.1uF
4580_SMD
U7C 8
C36
.1uF SYMETRIX INC.
14926 35th Avenue West
A 4 4
A
C33 4 C35 C37 Lynnwood, WA 98037-2303 USA
.1uF .1uF .1uF TITLE: REV:
306 MIX & OUTPUT A
DRAWING NO:
-15V
SHEET: 2 OF 5
6 5 4 3 2 1
SEE SHEET 1 FOR REVISIONS
+15V
+15V
+15V
C39
R72 R73
-15V 2 M 1K00
.0022uF
D R67 C41 C43
R138
R76
2 M D
499K 10K0
HIGH WHEN
20K0 4.7/NP ABOVE THRESHOLD R81
6
8
.47uF U10A
C38 R66 R75
CAP
VCC
2 C40 LM324_SMD
R68 1K00
PAGE - 1 1 7 3 Q5
20K0 3 IN OUT + 1
[SH2 B6, .047uF + 2 2N4403
4.7/NP 10K0
U8A
3 BIAS
-
5 SYM
GND
2 VEE
SH4 B1 C44
NJM2068M 10 10 U9
R69 R70 R71 THAT2252 R78
4
22M 1K00 124K .1uF
R77
Bandpass 170-3500 Hz +15V
49K9
R82
R80
1K00
C42 R74 2
1 3
R79A CW D_LED
.1uF 499K 50KB
C C
2
D17
-15V -15V THRESHOLD LED_T1_Y_FORM DUCK
D5 R83
1
U10C
1N4148 402 Q3 LM324_SMD C51
1N4148 R88
D6 2N4401 10
+ 8
20K0 9 .1uF
-
C45 R98
4.7/NP D7 DEPTH
1N4148 CW
R84 3 49K9
D8
10K0 1
1N4148 R87 R97 U10B
1 2 50KB 2 6
20K0 R96A - 7
R85A CV
3 49K9 5
50KB D9 +
+15V RELEASE 1N4148 D_LED
CW LM324_SMD [SH1 A3,
SH1 C3]
R86 R133
B 6K49
R133 TRIMS FOR
B
9K09 UNITY LINE GAIN
-15V WHEN PAGING
SIGNAL PRESENT UNUSED SECTION
R95
6 61.9
-15V U10D - 7
LM324_SMD 5 -15V
D10 R89 HOLD GATE SIDECHAIN +
U8B
13
- 14 NJM2068M
1N4148 402 Q4 12 +15V
+
2N4401
D11 R94
1N4148
2 M U10E
C46 C47 C49
D12 LM324_SMD
4.7/NP CW R93 .1uF .1uF
R92 8 4 COMPANY:
1N4148
HOLD
3
10K0 2K00
U8C
SYMETRIX INC.
2
14926 35th Avenue West
A D13
1
R90A D14
NJM2068M
4
C48
11
C50 A
1N4148 50KB 1N4148 .1uF .1uF Lynnwood, WA 98037-2303 USA
TITLE: REV:
R91
D15
306 SIDECHAIN A
3K01
1N4148 DRAWING NO:
-15V
-15V
SHEET: 3 OF 5
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