dbx 166A Service Manual
REV
P1 VARIOUS CHANGES 12.22.94----
A0 ---- 1.17.95CHANGES R173 & R202 1M TO 39.2K 1%
B0 VARIOUS HOLES SIZES CHANGES IN PCB. ---- 3.1.95
B1 4.11.95330REPLACE WIRE 36-0052 W/ 36-1140
B2 ADD 2 16 PIN DIP SOCKETS 516 8/28/95
B3 REMOVE 4 14-PIN IC SOCKETS 647 12.13.95
B4 STANDARDIZE FILM CAPS 714 1.17.96
B5 REMOVE C59 & C60 842 4.3.96
B6 CHANGE QT283332 TO QT322102 905 4.29.96
ECN# DATE ECN# DATEDESCRIPTIONREVISIONDESCRIPTION
|LINK
|056207B6.001
|056207B6.002
|056207B6.003
|056207B6.004
|056207B6.005
|056207B6.006
dbx Professional Products
8760 South Sandy Parkway
Sandy, Utah 84070
Title
dbx 166A DUAL COMPRESSOR/EXPANDER 80-6207
Size Document Number Rev
056207B6.000 B6
B
Thursday, October 21, 1999
Date: Sheet of
0 6
BALANCED INPUT
J11
J322115
1 2
4
J12
J322110
3
SIDE CHAIN
J8
J322110
3
WA8
WA283449
1
2
U18A
4
TL074
CHANNEL 1
IN1+
IN1+
3
IN1-
IN1-
R160
C64
1000PJ100M3
C58
1000PJ100M3
1
2
J105-10
J105-10
SW5B
4
5
6
SW440026
CONTOUR
49.9K 1%
C63
1000PJ100M3
R159
49.9K 1%
R139
33.2K 1%
C57
1000PJ100M3
C4
.39J
SW5D
10
11
12
C5
.047J
2
5
4
1
6
2
5
4
1
6
WA12
WA283449
R41
560K
R161
33.2K 1%
+15V
6
5
C35
27PJC3
R162
2.00K 1%
R203
200 1%
R43
24.9K 1%
R42
16.9K 1%
8
NE5532
R40
24.9K 1%
R97
22M
C45
27PJC3
U20B
P15
50K420222
C3
.1MD3
-15V
+15V
TP500317
5.1K
1
-15V
-15V
5
R171
5.76K 1%
R170
100 1%
R37
1.5M
R168
47
TP8
3
6247
R165
-15V
R172
C49
22NPM25E1
VCA CV LINK
COMP 1 CV
GATE 1 CV
RMS TRIM
123
4
1
2
8
+15V
+15V
U9
SYM
IN
BIAS
V+
UPC1253
20.0K 1%
R38
49.9K 1%
R39
20
C15
1M50E1
2.00K 1%
R166
1.62K 1%
D54
1N4148
GND
OUT
CAP
R167
V-
U25
UPC1252
3
7
6
5
7
-15V
2
8
R173
OMIT
39.2K 1%
R163
20.0K 1%
C46
47PJ100M3
1
2
3
4
-15V
+15V
2
R169
150K
-15V
OUTPUT
+15V
GAIN
3
2
P5
10K402122
1
-15V
OPTIONAL
+15V
2
-15V
C19
.15J
D34
LEDG702062
D35
LEDG702062
U20A
NE5532
1
3
1
3
R120
499 1%
10M
R164
2.00K 1%
1
VCA SYM
P17
50K420222
GAIN TRIM
P19
OMIT
50K420222
RMS 1 OUT
RMS LINK
R121
J105-2
J105-2
10
9
R136
10.0K 1%
R135
20.0K 1%
PEAKSTOP
LEVEL
P6
20K402121
U18C
TL074
+15V
R146
3
7.50K 1%
2
1
R87
3K
R156
10.0K 1%
8
R138
2.67K 1%
R149
3.16K 1%
R137
10.0K 1%
3
2
+15V
4.32K 1%
-15V
6
5
R157
6.04K 1%
2
3
-15V
5
6
R150
5.76K 1%
C44
10PJ100M3
49.9K 1%
R148
49.9K 1%
R147
U18B
11
TL074
D53
1N4148
U19A
NE5532
4
+15V
8
R145
1
7
1
U19B
NE5532
7
R158
60.4 1%
R155
4.53K 1%
R153
3.16K 1%
R151
3.24K 1%
R152
4.53K 1%
D52
1N4148
R154
60.4 1%
U18D
TL074
13
14
12
PEAKSTOP THRESHOLD LINK
J1
SW4B
SW440026
4
5
6
BYPASS
7
8
9
SW4C
SW440026
1000PJ100M3
J105-1
J105-5
J105-9
J105-11
J105-13
IN1-
IN1IN1+
IN1+
C61
10
11
12
SW4D
1
2
3
SW4A
J105-2
J105-2
J105-10
J105-10
+15V
-15V
BALANCED OUTPUT
C62
1000PJ100M3
J9
J322114
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
RC321155
J1A
DIP16S
12
4
3
J10
2
J322110
5
4
1
6
3
WA10
WA283449
1
2
C17
.0047J
C20
.39J
9
8
10
U10C
TL074
dbx Professional Products
8760 South Sandy Parkway
Sandy, Utah 84070
Title
dbx 166A DUAL COMPRESSOR/EXPANDER 80-6207
Size Document Number Rev
056207B6.001 B6
B
Thursday, October 21, 1999
Date: Sheet of
1 6
RMS 1 OUT
50K420278
COMPRESSOR
THRESHOLD
P3
20K402121
P16
OMIT
R60
4.99K 1%
OPTIONAL
THRESHOLD TRIM
+15V
R88
OMIT
3
412K 1%
2
1
-15V
+15V
1
2
3
-15V
R86
1.5M
-15V
R58
412K 1%
R83
10.0K 1%
TP2
TP500317
1
2
CHANNEL 1
R59
10.0K 1%
R57
10.0K 1%
-15V
6
5
U12B
11
TL074
COMPRESSOR
RATIO
P4
20K402121
+15V
R52
280K 1%
D33
1N4148
2
R84
100 1%
OVER EASY
SW1B
R85
4.99K 1%
4
5
6
SW440027
R56
280K 1%
12
13
R123
1.74K 1%
SW1A
U12D
TL074
1
R55
2
3
523K 1%
R54
14
D39
1N4148
2
3
523K 1%
+15V
4
U12A
TL074
R112
20.0K 1%
4
5
6
SW3B
SW440026
R115
C23
2.2M50E1
10.0K 1%
R114
39.2K 1%
1
2
D40
1N4148
R34
10.0K 1%
TP3
TP500317
C21
.22J
1
R116
10.0K 1%
R113
20.0K 1%
C22
2.2M50E1
Q4
7
2N4402
8
9
SW3C
SW440026
D37
1N4148
U12C
TL074
9
8
10
R35
1M
SW3A
R117
39.2K 1%
10
11
12
SW3D
SW440026
MODEMODE
+15V
R53
200K 1%
1
MODE
2
3
-15V
G.R. METER LINK
R44
7.15K 1%
R33
10.0K 1%
R45
5.76K 1%
C32
2.2M50E1
D28
1N4148
7
3
1
J105-5
J105-11
J105-9
J105-1
COMP 1 CV
GATE 1 CV
GATE
THRESHOLD
P1
20K402121
+15V
-15V
3
1
R61
2.49K 1%
R46
7.50K 1%
2
U11E
CA3046D
12
1314
R100
174 1%
-15V
U11C
CA3046D
2
3
+15V
U11D
CA3046D
6
U10A
4
TL074
9
R49
124K 1%
3
1
R47
4.99K 1%
2
+15V
U10B
TL074
+15V
R51
U11A
CA3046D
78
2
TP500317
D25
1N4148
1
1011
R122
1.5M
-15V
31
2
TP5
R50
2.00K 1%
1
CA3046D
U11B
3 5
6.34K 1%
D26
4
1N4148
R82
7.50K 1%
J105-13
C11
.047J
P2
1M402094
GATE
RELEASE
R48
124K 1%
-15V
D27
6
1N4148
7
5
11
U10D
D38
TL074
14
1N4148
R119
210 1%
Q3
2N4400
R98
100K 1%
-15V
R99
10.0K 1%
dbx Professional Products
8760 South Sandy Parkway
Sandy, Utah 84070
Title
dbx 166A DUAL COMPRESSOR/EXPANDER 80-6207
Size Document Number Rev
056207B6.002 B6
B
Thursday, October 21, 1999
Date: Sheet of
2 6
12
13
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