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050257D.sch-1 - Wed Nov 30 14:17:33 2011
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D CHANGE C29 TO OMIT PART REDUCE BUZZ NOISE CN00795 W. REN 11-30-11
C0 CHANGE R23 TO 1K OHM, ADD 4 1K OHM RES. IN PARALLEL TO R23 E201000300 DWB 7-15-10
B0 PCB CHANGE ONLY E201000203 KLB 05-28-10
A0 PRODUCTION RELEASE E201000100 KLB 03-23-10
P1 - - - 01-26-10
P0 - XXX MM-DD-YY
GLOBAL FIDUCIALS BREAK-OFF TABS FOR BOARD SEPARATION REV DESCRIPTION ECN # INIT DATE
A6 A1
FIDUCIAL-XRAY FIDUCIAL-XRAY A9 A12 A15 A18 REVISION HISTORY
BRKOFF BRKOFF BRKOFF BRKOFF
A7 A3
A10
BRKOFF
A13
BRKOFF
A16
BRKOFF
A19
BRKOFF dbx PROFESSIONAL PRODUCTS
FIDUCIAL-XRAY FIDUCIAL-XRAY
8760 South Sandy Parkway Sandy Utah 84070
A11 A14 A17 A20
BRKOFF BRKOFF BRKOFF BRKOFF TITLE:
MH2
A8 A2 MP300H156 dbx 286A2 MIC PREAMP/PROCESSOR
FIDUCIAL-AI FIDUCIAL-AI SC1 SC2 SC3
SC340125 SC340125 SC340125 1-INDEX
DESIGNER: ENGINEER:
WAYNE REN JON DUFFIN
A5 A4
FIDUCIAL-AI FIDUCIAL-AI LBL1
30-0121
MH3 MH4 MH1 MH5 MH6 SIZE: DRAWING NO: REVISION
MH156 MH156 MH156 MH156-TOOL MH156-TOOL
PCB1
80-0257
A 05-0257 D
DATE: FILENAME:
11-30-11 050257D.SCH SHEET: 1 OF 6
050257D.sch-2 - Wed Nov 30 14:17:34 2011
+48V R231 1K 1%
PHANTOM POWER R142 1K 1%
SW1-A 1 +48V
SW440050 2 R16 1K 1%
3
R15 1K 1%
D34
[6] R23 1K 1% 1N4148SE C40
PHANTOM_JB +15V 0.1uF-C
[6] C23 + R34 R28 50V Y5V
PHANTOM_MB
100uF-E R22 20.0K 1%
GAIN 20.0K 1%
63V 100K 1%
VR4-A C33
C51 + 1000uF-E
47uF-E D32 R31 10K-C 6.3V
1 1SMA15CAT3TVS
R13 R14 63V ESR 49.9 1% 1 3
1 15V
6.81K 1% 6.81K 1% +
J1 2
C22
J320206 47uF-E Q6 2 2 MMBT4033 1
R12 R20
2.5K 100MHz 63V ESR MMBT4033 Q4
20 1%
1 2 [6] [6] 1 3
MIC INPUT 4 +
MIC+_JB MIC+_MB
C34 3 C30
C13 C14 D21 C35 10pF-C 3 Q3 1 10pF-C
D22
3 220pF-C 220pF-C S1G 220pF-C R30 50V NPO 3 1 Q5 BC846 50V NPO
S1G
50V NPO 50V NPO 50V NPO 3.01K 1% BC846 2
2
C32
220pF-C R27
S1G D16 1.21K 1%
50V NPO R33
C21 D17 S1G
47uF-E 1.21K 1%
R11 R19
2.5K 100MHz 63V ESR
20 1%
[6] MIC-_JB MIC-_MB [6]
+ [2] [2]
MIC_IN_- MIC_IN_+
C12 C11 C31
220pF-C 220pF-C 220pF-C R29
50V NPO 50V NPO 50V NPO 3.01K 1% R32 R26
1.21K 1% 1.21K 1%
R17 R18
J2 10.0K 1% 10.0K 1%
R8
J320214 600 100MHz
2
5
LINE INPUT 4
D35
1N4148SE
1 C48
0.1uF-C
6 3 R9 50V Y5V
600 100MHz -15V 63V ESR
47uF-E
+ C52 D33
1SMA15CAT3TVS
C4 C6 C3 C5
220pF-C 220pF-C 220pF-C 220pF-C
50V NPO 50V NPO 50V NPO 50V NPO
GAIN R3
VR4-B R153 10
10K 1% C149 C86 [6] INSERT_RTN_JB
10K-C 47pF-C
C148 OMIT
C53 4 6 OMIT C107 50V NPO C8
18pF-C 0.1uF-F R187 470pF-C
2
50V COG 50V 1M 1% 50V NPO
U12-A 1
R123 5 3
1.5K 1% R136
TL074 50V
20K 1% 2
C80 50V 0.1uF-F
R37 47pF-C R154 C106 5
0.1uF-F C150 R135 J3
5.62K 1% 50V NPO C57 39.2K 1% SW2-A 3 R1 R2 4
OMIT 20K 1% 49.9 1% 49.9 1% J320214
SW440050 2 2 [6] 1
C50 INSERT_SND_JB
NJM4580
22uF-E
35V R122 C85
22uF-E
1
U6-A 1 [6] INSERT_SND_MB
3 6
INSERT
MIC_IN_- [2] 6 3
2K 1%
U3-B 7 2 NJM4580 35V HIGH PASS C7
[2] 5 + 1 NJM4580 470pF-C
MIC_IN_+ U3-A 50V NPO
3 +
R188
C54 [5] 1M 1%
R38 INPUT_CLIP_LED_DRIVE
18pF-C
5.62K 1% 50V COG
3 R7 R6
SW3-A 49.9 1% 49.9 1%
C59 2
47pF-C SW440050 1
50V NPO 1 C10
470pF-C
PROCESS BYPASS 50V NPO
R53
20K 1%
C36 R52 LINE OUTPUT
22uF-E 20K 1% 2
35V R54 5 J4
20K 1% R4 R5 4
[4,5] 6 J320214
CLIP_LED 49.9 1% 49.9 1%
+ U6-B 7 [6] OUTPUT_MB OUTPUT_JB [6] 1
5
NJM4580 C9 3 6
470pF-C
R140 50V NPO
20K 1%
SIZE: SHEET TITLE: REVISION
A 2-INPUT_OUTPUT_JACK D
DATE: DRAWING NO:
11-30-11 05-0257 SHEET: 2 OF 6
050257D.sch-3 - Wed Nov 30 14:17:34 2011
+15V R71
1M 1%
DENSITY
3
VR50K402136 2 5 TL074
50K-A R73 R68
VR6 U8-B 7 3.01K 1% 121K 1% R67
1 6 2.49K 1%
R56 R65
100K 1% R66
3.01K 1% 121K 1%
R194 R57 [4] 13
499 1% 10M DE-ESSERCV
U8-D 14
2 12
R70
1 Q9 TL074
+15V 100K 1%
2N3906
2 3 2 R58
2N3906 1 10M +15V R139 R69
1 Q7 475K 1%
Q14 2N3904 R144 121K 1%
3 3 13.3K 1% -15V
3
VR50K402138
50K-B 2
D20 + C113 + C114 + C116 + C115 VR5 R64 R63
1N4148SE C125 1uF-E 1uF-E 1uF-E 1uF-E 1 100K 1%
50V 50V 50V 50V BAT54S R72 150K 1%
0.22uF-F
50V D24 10M
C145
OMIT
1N4148SE
R137 R138 D19 DRIVE R189
R193
-15V
22.1K 1% 22.1K 1% 280K 1% R62
121K 1% 3.01K 1%
10 TL074
-15V 8 D41
-15V U8-C R190
9 1N4148SE
R227 1.5K 1%
-15V 22.1K 1% 1N4148SE
D25
R55 R51 R192 R61
3.01K 1% 3 3.01K 1%
63.4K 1% R191 121K 1%