Text preview for : 421M_1C00_sch.pdf part of . Various 421M 1C00 sch . Various SM scena Symetrix 421M_1C00_sch.pdf
Back to : 421M_1C00_sch.pdf | Home
6 5 4 3 2 1
REVISION RECORD
LTR REVISIONS DONE OR ECO NUMBER: DATE:
J3-1 3.0 REMOVE DE-THUMP, "FINALIZE" COMP VALUES 09/21/95
"FINALIZE" COMPONENT VALUES AGAIN,
+ A.0 FIX EXPANDER THRESHOLD, RELEASE TO PRODUCTION. 11/08/95
B.0 CHANGE C9-12 TO METALIZED POLY 04/05/96
J3-2
B01 Chg fuse text to reflect changed values. 07/05/96
-
D C3 C4 C79 C53 INPUT_LVL LOGIN
C Add R187,R210,C80,C81 (sheet 6) per ECN138 04/14/99 D
220pF 220pF 220pF 220pF
J3-3 SH6 SH4,6
(0 to -10dB)
R2 R4 R6 LINE GAIN R21 R24 RLY-
(BACK PANEL) R20 SH7
+15V RL1 RLY+
CW
J3-4 SH7
J2 1K00 9K09 4K99 10K0 100 4
61.9 J3-5
C1 C5 C14
U4 3 7 C17 +
470pF R177A 5
100p 47NP
10KA EC1 VCC
LINE 100p R14 1
J3-6
C2 1 8
INPUT 1/4" TRS JACK 470pF IN 2150A OUT 6
-
U3B
XLR-MALE
-
2 U1A 7 3
- R178 13K0 S V E G 5 J4
R1 R3 1 4K22 Y E C N + R26 2
3 NE5532 2 J3-7
+55V + M E 2 D 100K 1
C13
SH7 Q16 1K00 9K09 RC4560 4.7NP 4 5 2 6 R22
8
3 GND
TIP30A 6
R244 R5 C6
R241
4K99
100p 10K0 4
R19
4K99
C PHANTOM Z3 200
59K0
R240
+15V R16
1M
R23
7 C
(SHOWN OUT) R232 160035
R245 D70 2K00 78K7 R17 10K0
2 3 R231 C16
1
1N4742 2K00 U1B 61.9 C15
6
12V - 7 R27
2
SW7A 1 249 50K
R234 5 22pF R25 47NP 100K
+ R15
R243 THD J5
CW
RC4560 R35 2 U3A
MIC GAIN
3
10K0 20 -
CW
1K21 1 100
R248 (BACK PANEL) 3
R242 R18 +
1K00 78K7
61.9
R233 C73 -15V NE5532
2
R228 2K5-C SW2A -15V
SH6 1/4" TRS JACK
L1 100
330pF
6 KHz VCA_CV R31 R30
(SHOWN OUT) 10K0 10K0
BEAD 133 mV/dB
1
R237
3
C70 Q12
2N4403 Q13 R28
470pF C12
R246 2N4403 10K0 C11
C72
470pF, 2.5% R238 10K0
U13A R12 R13
4K99 100K
B +
C74 R227
2
3
- 1
R9
.0047 .0047
U2B
C18
100p
B
100 + U2A 6K49 6K49 5
47/63 RC4560 + U5A OUT_LVL
R235 7
C84 6K49 3 + 6
2
- SH5
R247 L2 C78 10K0 R236 1 - 1
D69 C10
2 -
3
+
BEAD R10 .0022 RC4560
4K99 330pF 100K
4.7NP 6K49 RC4560
R229 RC4560
U13B 6
1K00 -
7 R29
5 C9 C19
C69 + 10K0
R230 RC4560 .0022
C71 D68 1K00 100p
470pF, 2.5%
470pF, 2.5%
XLR-FEM SW8A
C7 1
2
MIC 1 .056 2
R7
3 3 COMPANY:
J1
-15V2
SH6 125 Hz SYMETRIX INC.
A C68 NOTE: C8
15K0
5
U5B
(SHOWN OUT)
R11 14926 35th Avenue West A
1. ALL DIODES 1N4148 UNLESS NOTED + 100K
2. ALL RESISTORS IN OHMS .056 7 Lynnwood, WA 98037-2303 USA
6
C85 3. ALL CAPS IN uF UNLESS NOTED - TITLE: REV:
470pF, 2.5% R8
30K1 RC4560 DRAWN:
RB
DATED:
421M - AGC LEVELER C
.001 3/21/95 DRAWING NO:
RELEASED: DATED:
52 421M 1 SHEET: 1 OF 7
6 5 4 3 2 1
+15V
"ON" IN AUTO (CAUSES GAIN TO DECREASE IF STEADY STATE
Q3 SIGNAL PRESENT, SUCH AS FEEDBACK)
U6A
2N5458
2
-
R70 1 R49
3 100
ARM +
D SH4 10K0 LM324
R65
R66
D
R69 1M R67
4K99 4K99
383K0 D2 R42
Q2
2N4401 IN15
1K00
SH7
R37 D8 R68 D3 R51
383K0 R41 EXP_CV
200K D5 9K09 SH3
1M
R52 D6
D1 U7D D17
D4 12
+ 14
R50 10K0
GREEN EXPAND
R278 D93
U7C 13 - U7B
Q1 13K0 5 R55
U6B 2N5458 9 LM324 +
- 4K99 7
6 R39 R40 8 R48
- 7 10 +
6
-
U7A 4K99
5 2 LM324
LOG_OUT + 2K67 20K0 10K0 -
LM324 LM324 R43 1
SH4 3
R36 C21 R44 500KA 2 R45 R47 +
C 1M
"OFF" IN AUTO
.47uF 1 3 150K0 LM324 C
20K0 CW 2K00
EXPANDER
RELEASE + C23 C24 R46
(FRONT PANEL) 2.2 4.7NP 1M
R38 R56 D10
4K99 768K +15V R64
D53 13K0
R74
+15V R63 -15V
-15V 10K0 2M2
R112
10K0 R62 D7
R60 HIGH WHEN EXP IN BYPASS
383K0
R113 10M
1K21
U6D
13 -
14
B R59 R61
12 +
B
LM324
AUTO 13K0 4K99
LOW WHEN IN AUTO
1
R58
EXPANDER 50KB
THRESHOLD
2
(FRONT PANEL) R75
CW
10K0
3
BYPASS U6C R54
9 20K0 OPEN WHEN IN AUTO
- 8
R71
10 +
Q17
10K0 LM324
R57 2N4401
10K0 R73
COMPANY:
10M R103 SYMETRIX INC.
A R72
10K0
D9
R249
10K0
14926 35th Avenue West
Lynnwood, WA 98037-2303 USA
A
3M3
-15V TITLE: REV:
DRAWN:
RB
DATED:
421M - EXPANDER C
3/21/95 DRAWING NO:
-15V RELEASED: DATED:
52 421M 1 SHEET: 2 OF 7
6 5 4 3 2 1
D LOG_OUT
SH4 +15V
D
D71
+15V
IN15
R80 U25B SH7
158K0 D12 U8D
CW
5 R83
3
+ +15V WHEN UNIT IS ENABLED
R78 7 12
+
R76 6 14
- 100 13
50KB -
2
249K0 RC4560 R85
R95 LM324 R87
OUTPUT LIMITER + R84
1
10K0 C20 10M 200K
R81 C22