DBX 905 EQ, 905 Schematic
ECN# DATE ECN# DATEDESCRIPTIONREVISIONREVISION DESCRIPTION
A0 RELEASE TO PRODUCTION 4.5.95
|LINK
|056174A0.001
|056174A0.002
dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway
Sandy, Utah 84070
Title
DBX 905 PCA PARAMETRIC EQ 80-6174
Size Document Number Rev
056174A0.000 A0
B
Wednesday, October 20, 1999
Date: Sheet of
0 2
P1
PA15
TO OUTPUT MODULE
J2
HCN323160
MID CLIP SENSE
EQ OUT
R80
200K 1%
50K402104
C36
4700PH160A
4 6
R91B
20K402105
-/+HIGH
R106
20.0K 1%
C41
1S63E1
HIGH (800-20KHZ)
SHELFHIGH
S2F
SW440147
141618
R82A
5
C32
1000PF500F
OA11A
NE5532
2
1
R84
10K
R81
8.25K 1%
R53
2.10K 1%
1M
10
IC3A
MC14053
R107
20.0K 1%
C39
100PK1KD
2
3
-15V
DUAL FREQ
R83
1.15K 1%
R90
20.0K 1%
R99
1
2
OA13A
NE5532
C40
1S63E1
4
3
4
-15V
R94
20.0K 1%
R96
10K
C50
1S63E1
R32
100K
9
5
3
IC3C
MC14053
1
1 3
2
15
R111
10K
R85
200K 1%
R82B
4 6
50K402104
5
+15V
6
5
R97
100K
2
3
-15V
4
R67
20.0K 1%
LEDR702098
dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway
Sandy, Utah 84070
Title
Size Document Number Rev
B
Date: Sheet of
R86
8.25K 1%
R88
1.15K 1%
R95
20.0K 1%
8
7
OA12B
NE5532
1
OA12A
4
NE5532
R108
22.1K 1%
R109
90.9K 1%
LOW
SHELF
135
S3A
CR5
DBX 905 PCA PARAMETRIC EQ 80-6174
056174A0.001 A0
SW440147
CR6
LEDR702098
135
S2A
SW440147
HIGH
SHELF
Wednesday, October 20, 1999
C42
1S63E1
C35
1S63E1
100K
2
C34
1S63E1
R98
3
1
C33
1000PF500F
131517
NOTCH CAL
R110
50K420281
MID STAGE
6
5
R100
3.57K 1%
C37
1S63E1
+15V
R89
10K
HIGH
SHELF
S2E
SW440147
8
7
OA11B
NE5532
1 2
CR1
1N4004
1
-24V
2
+24V
3
4
5
+15V
6
-15V
7
8
9
10
11
12
AUDIO IN +
AUDIO IN +
13
AUDIO IN -
AUDIO IN -
14
AUDIO OUT +
AUDIO OUT +
15
AUDIO OUT -
AUDIO OUT -
1
A
2
B
3
C
EQ OUT
4
D
5
+15V
E
6
-15V
F
7
G
8
+24V
H
9
-24V
I
10
J
R120
10K
R119
10K
R118
10K
R121
10K
R123
10K
R124
10K
R125
10K
R122
10K
CR10
1N4148
CR9
1N4148
CR8
1N4148
CR11
1N4148
CR13
1N4148
CR14
1N4148
CR15
1N4148
CR12
1N4148
SW440146
R117
100K
R126
100K
CR2
1N4004
SW440146
4
5
6
S1D
+15V
C3
10S63E1
-15V
C4
10S63E1
R19
1.5K
C2
-15V-15V
R2
10.0K 1%
C1
100PK1KD
R4
10.0K 1%
R5
7.50K 1%
+15V
R114
10M
C46
.001K1KD1
8
14
9
OA14C
LM339D
12
-15V
OA14D
LM339D
10
13
11
P2
PA1
P3
PA1
R1
1K
IN
S1B
R6
1K
10
11
100PK1KD
12
IN
1
2
3
S1A
SW440146
CR3
LEDR702098
+15V +15V +15V
R115
100K 1%
+15V
3
4
2
5
OA14A
LM339D
R116
536K 1%
OA14B
LM339D
6
1
7
R127
100K 1%
-15V
R3
7.50K 1%
+15V
2
3
415
-15V
RED OVER
LED
-15V
7
1
YELLOW
WHITE
1
C5
1S63E1
6
OA1
LF351
R113
2.2K
C6
1S63E1
R78
10.0K 1% R79
R77
10.0K 1%
R91A
20K402105
HIGH Q
1.54K 1%
2
R92
20.0K 1%
R103
2
3
13
10.0K 1%
+15V
7 4
-15V
20K402105
C44
1S63E1
1
8
6
5
OA10
NE5534D
C45
1S63E1
NOTCH
C38
100PK1KD
HIGH
SHELF
R91C
7 8
13
12
R104
20.0K 1%
6
5
HIGH SHELF
+15V
67816
+15V
8
R105
10K
C43
22PK1KD
246
81012
11
OA13B
NE5532
R93
20.0K 1%
R101
100K
14
IC3B
MC14053
7
S2C
SW440147
S2D
SW440147
+15V
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