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REVISION DESCRIPTION ECO# DATE REVISION DESCRIPTION ECO# DATE




|LINK
|056172A0.002


DOD Electronics Corp.

8760 South Sandy Parkway
Sandy, Utah 84070

Title
DBX 903 COMPRESSOR/LIMITER MODULE 80-6172

Size Document Number Rev
B 056172A0.001 A0

Date: Thursday, March 23, 2000 Sheet 1 of 2
P1
PA15
1 -24V
2 +24V
3 +24V
4
5 R34
+15V 2.21K 1% D
6
7 -15V
8
9 D7
10 LEDR702098
11
12 R30
13 R2
20.0K 1% D S1A
14 0D
SW440146
15 R1 1
0D R18 C6 C13 2
4.99K 1% D .01MD +24V 22S63E1 3
R3 R13 +15V
M1
1.00K 1% D 7.32K 1% D +24V
R24
R26 Q1 7
2.21K 1% D R28




3
R7 C7 -15V 2.21K 1% D 2N3440 8
5.62K 1% D
2 9
10.0K 1% D .01MD
C1
C5 C11




5
7
3
100PK1KD S1C
R15




1
2 10NPM25E 100PK1KD
R4 R8 13.7K 1% D
1 1 8
1.00K 1% D 10.0K 1% D 3 U1
UPC1252 OFFSET C12
U5A
LF353D +15V TRIM 1S63E1 R31
U4




4




2
4
6
R17 R20 LF351D 33 D R33




1




7
C2 R11 -15V +15V 20 1% D 10
R16 150K 1% D 365 1% D
100PK1KD 7.32K 1% D 2 +15V R77 2 11
50K420279




1
6 12
VCA SYM OMIT
R9 R14 R21 R22 2 3




3
7.50K 1% D 49.9 1% D OMIT R32 S1D
100K 1% D




7
-15V R23 33 D




3




4
1
5
R5 R19 2 OMIT 4
10.0K 1% D +15V 49.9 1% D 6 C8 -15V 5
C3 3 U3 .01MD C14 6
R27
8




1
100PK1KD LF351D 22S63E1
2.21K 1% D
6 R42 2 S1B
R6 R10




4
1
5
7 4.64K 1% D
10.0K 1% D 100K 1% D 5 -15V R29 Q2
+15V
C10 R25 2N4036




3
R36 R39 C9 5.62K 1% D
.001K1KD1 2.21K 1% D




1
U5B .01MD -24V
LF353D R35 2
OMIT 24.9K 1% D
C4
100PK1KD OMIT -24V
R12
7.50K 1% D GAIN CAL C15
3
68PK1KD
-15V
C16 U7A
R44
+24V 1J50FD 4558D R43
10.0K 1% D
+15V 2 0D
R38 1
1




3 1 J1A
R37 374K 1% D -15V
C19 D10 2 R41 R73 HCN323159
10S63E1 1N4004 20K402106 1.00K 1% D 24.9K 1% D


4
OUTPUT 2 J1B
+15V
3




-15V HCN323159
C20 D11 -15V R40 R66 C23
10S63E1 1N4004 49.9K 1% D 3 J1C
49.9K 1% D 68PK1KD
HCN323159

+15V
-24V -15V 4 J1D
+24V




8
R54 R56 OFFSET HCN323159
3




+15V R45 R53 255K 1% D TRIM 6
232K 1% D
20 1% D 20K402106 2 7 5 J1E
+15V
THRESHOLD R60 5 HCN323159
50K420279 R74
R57 U7B
1




C17 D8 R46 12.4K 1% D +15V 1.00K 1% D TO LED BOARD
4558D
10S63E1 1N4004 R61 R63
47.5K 1% D




1
+15V 5.6M D 165K 1% D
+15V C21 R58 R59 2
R48 1S50E1 100K 1% D
C18 D9 +15V 12.4K 1% D
1




10S63E1 1N4004 24.3K 1% D R52 R55
1




3
R47 2 50K420279 750K D
50K420279 THRESH 2 -15V -15V +15V +15V
U6A
OUTPUT CAL LF353D
3




8




1
-15V 2 R76 D14
3




-15V 4 3 1 6 2 2 LEDR702098
SYM GND R64A 1.00K 1% D
1 7 -15V 3 7 20K402103 1
2 IN OUT 6 R62 5 R71 3
U2 BIAS CAP




4




3
8 5 10.0K 1% D 2.21K 1% D U8A
V+ UPC1253 V-
4




R49 U6B 5 4558D




4
22M D -15V LF353D
+15V R163
619 1% D




6
+15V C36
R64B




1
-15V 1S63E1
R50 R51 20K402103
768K 1% D -15V 1M 1% D 2 +15V
C35 R65
8




R68 R69
5K420285




1
1S63E1 6 R67 6.19K 1% D
50K420279 22.1K 1% D




3
7 C22 C34 2
5 1S50E1 22S63E1 LED CAL
U8B +15V +15V +15V +15V +15V R72 R75




3
4558D 1.00K 1% D 680K D
-15V -15V R70
C24 C25 C26 C27 C28 13.0K 1% D
.1MM2 .1MM2 .1MM2 .1MM2 .1MM2


-15V -15V -15V -15V

PCB1 H1
C29 C30 C31 C33 DOD Electronics Corp.
.1MM2 .1MM2 .1MM2 .1MM2 80-6172-A 706008
H2 8760 South Sandy Parkway
Sandy, Utah 84070
706008
Title
DBX 903 COMPRESSOR/LIMITER 80-6172

Size Document Number Rev
B 056161A0.002 A0

Date: Thursday, March 23, 2000 Sheet 2 of 2
056172a0
&l0 (s0P (s15H (s8V (s0S &l6D &l66P &l3E &a7L &a120M &l61FDOD Software
Page 1
DBX 903 COMPRESSOR/LIMITER MODULE 80-6172 Revised: August 2, 1994
056172A0.001 Revision: A0
Bill Of Materials August 11, 1994 12:21:51
Quan Reference Part SYMAN Description
_______________________________________________________________________________________________________________

5 C1,C2,C3,C4,C11 100PK1KD 62-3040 100 pF Capacitor 10% 1KV Ceramic Disc
1 C5 10NPM25E 60-1043 10 uF Capacitor -20%,+20% 25V Electrolytic N.P.
4 C6,C7,C8,C9 .01MD 62-3028 .01 uF Capacitor 20% 50V Ceramic
1 C10 .001K1KD1 62-3051 .001 uF Capacitor 10% 1KV Ceramic Disc Ammo
3 C12,C35,C36 1S63E1
3 C13,C14,C34 22S63E1 60-0325 22 uF Capacitor -20%,+80% 63V Electrolytic
2 C15,C23 68PK1KD 62-3038 68 pF Capacitor 10% 1KV Ceramic AXL NPO
1 C16 1J50FD 56-5065 1 uF Capacitor M/Plyes Rad 50V 5%
4 C17,C18,C19,C20 10S63E1 60-0320 10 uF Capacitor -20%,+80% 63V Electrolytic
2 C21,C22 1S50E1 60-1024 1 uF Capacitor 50V Alum Rad
9 C24,C25,C26,C27,C28,C29, .1MM2 62-3068 .1 uF Capacitor 20% 50V Ceramic, Z5U
C30,C31,C33
8 D1,D2,D3,D4,D5,D6,D12, 1N4148D 70-0042 1N4148 Silicon Switching Diode, 75 Volts PIV DBX
D13
2 D7,D14 LEDR702098 70-2098 Red Light Emitting Diode, DBX
4 D8,D9,D10,D11 1N4004 70-0009 1N4004 Rect 1A 400V, DBX
2 H1,H2 706008
1 J1 HCN323159 32-3159 5 Pin Top entry connector, .156
1 P1 PA15 ------- 15 Pin Pad, Not a part
1 PCB1 80-6172-A 80-6172-A DBX 903 MAIN PCB RAW
1 Q1 2N3440 70-1038 2N3440 NPN Signal Transis
1 Q2 2N4036 70-1042 2N4036 PNP Signal Transis
3 R1,R2,R43 0 D 50-2452 0 Ohm Resistor 5% 1/4 Watt Carbon Film
6 R3,R4,R41,R72,R74,R76 1.00K 1% D 52-2020 1.00 KOhm Resistor 1% 1/8 Watt Metal Film
6 R5,R6,R7,R8,R44,R62 10.0K 1% D 52-2102 10.0 KOhm Resistor 1% 1/8 Watt Metal Film
3 R9,R10,R59 100K 1% D 52-2183 100 KOhm Resistor 1% 1/8 Watt Metal Film
2 R11,R13 7.32K 1% D
2 R12,R14 7.50K 1% D 52-2090 7.50 KOhm Resistor 1% 1/8 Watt Metal Film
1 R15 13.7K 1% D 52-2119 13.7 KOhm Resistor 1% 1/8 Watt Metal Film
5 R16,R47,R52,R60,R67 50K420279 42-0279 50 K Trim Pot, Horizontal Mount, Cermet
1 R17 150K 1% D 52-4053 150 KOhm Resistor 1% 1/8 Watt Metal Film
1 R18 4.99K 1% D 52-2073 4.99 KOhm Resistor 1% 1/8 Watt Metal Film
2 R19,R21 49.9 1% D 52-2006 4.99 Ohm Resistor 1% 1/8 Watt Metal Film
1 R20