dbx 905 Service manual
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
R43
10.0K 1%
20.0K 1%
MID STAGE
MID (200 - 5KHZ)
R44
10.0K 1%
R45
10.0K 1%
+15V +15V
7 4
1
2
8
6
3
5
C31
22PK1KD
OA6
NE5534D
-15V
R57
1.54K 1%
C26
1S63E1
IC2B
MC14053
C25
100PK1KD
R69
10K
50K402104
R59
+15V
20K402105
13
12
R68
20.0K 1%
+15V
6
5
R66
100K
NOTCH
7 8
R58C
67816
8
R46
232K 1%
1 3
R47
10.0K 1%
2
R48A
R49
1.15K 1%
R56
20.0K 1%
2
1 3
R58A
20K402105
MID Q LOW Q
11
OA9B
NE5532
14
7
4 6
R58B
20K402105
-/+ MID
R70
20.0K 1%
5
R72
10K
15
R50
10K
10
IC2A
MC14053
C24
100PK1KD
2
3
DUAL FREQ
1
2
R71
20.0K 1%
4
-15V
C20
3300PH63A
OA7A
NE5532
2
3
-15V
OA9A
NE5532
1
C27
1S63E1
R51
232K 1%
1
4
5
3
9
IC2C
MC14053
R60
20.0K 1%
NE5534D
R62
10K
C29
1S63E1
4
R48B
4 6
50K402104
5
1.15K 1%
OA8
2
3
ICS1
DIP16SD
I1
INS242003
I4
INS242003
PCB1
80-6174-A
+15V
-15V
R54
R61
20.0K 1%
7 4
R73
22.1K 1%
R74
90.9K 1%
1
8
6
5
C47
22PK1KD
R52
10.0K 1%
10S63E1
R63
100K
R64
3.57K 1%
ICS2
DIP16SD
3300PH63A
OA7B
NE5532
C28
1S63E1
C22
2
R34
20.0K 1%
I2
INS242003
I5
INS242003
6
5
R55
10K
C23
1S63E1
3
NOTCH CAL
R75
50K420281
1
MID CLIP SENSE
8
R7
10.0K 1%
ICS3
DIP16SD
7
20.0K 1%
I3
INS242003
I6
INS242003
LOW (20 - 500HZ)
R8
10.0K 1%
R9
10.0K 1%
C18
+15V
1S63E1
7 4
1
2
8
6
3
5
C30
S3C
22PK1KD
OA2
NE5534D
SW440147
S3D
LOW
SHELF
NOTCH
7 8
13
12
R33
20.0K 1%
C13
100PK1KD
6
5
R21
+15V
+15V
67816
8
246
81012
11
OA5B
NE5532
R31
100K
14
IC1B
MC14053
7
1 3
C19
-15V
1S63E1
SW440147
R23
R30
2.10K 1%
1.54K 1%
R20C
20K402105
R35
10K
LOW
SHELF
50K402104
LOW
SHELF
2
R20A
20K402105
+15V+15V
4 6
LIN -/+ LOW
C14
1S63E1
R14A
R20B
5
20K402105
R36
20.0K 1%
R10
232K 1%
S3F
SW440147
141618
1 3
2
15
R38
10K
R17
10K
C11
.15JB
10
IC1A
MC14053
C48
100PK1KD
2
3
DUAL FREQ
R13
10.0K 1%
R18
1.15K 1%
R22
20.0K 1%
1
2
R37
20.0K 1%
4
-15V
C7
.033JB
OA3A
NE5532
2
1
3
4
-15V
C49
1S63E1
R28
100K
5
3
IC1C
MC14053
OA5A
NE5532
1
C15
1S63E1
dbx PROFESSIONAL PRODUCTS
8760 South Sandy Parkway
Sandy, Utah 84070
Title
DBX 905 PCA PARAMETRIC EQ 80-6174
Size Document Number Rev
056174A0.002 A0
B
Date: Sheet of
R11
232K 1%
R14B
4 6
50K402104
5
1.15K 1%
R24
20.0K 1%
OA4B
NE5532
R65
10K
9
Wednesday, October 20, 1999
4
EQ OUT
6
5
2
3
+15V
-15V
R39
22.1K 1%
R40
90.9K 1%
8
4
R25
20.0K 1%
R26
100K
OA4A
NE5532
C17
1S63E1
R15
7
1
R12
10.0K 1%
2
.033JBC21
C16
1S63E1
C9
10S63E1
SW440147
C10
10S63E1
R27
100K
3.57K 1%
3
1
C8
+15V
6
5
S3E
R29
C12
10S63E1
R41
50K420281
NOTCH CAL
2 2
R16
10K
8
NE5532
LOW
SHELF
7
OA3B
131517
Loading...