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H1-1 H1-2 EFF SEND J3 EFF RTN J4 H1-3 P5 B50K + R31 47K V R23 1M C3 10 C2 J2 LOW .068 R4 13K R3 39K 2 C1 J1 HI R1 3
A1.A
P1 H1-4 cw 25K
MID R48 2.7K R32 47K 2 3 A4.A + R33 1 1.5K MID FREQ C18 R25 10K .033 cw P3 B50K C19 BASS R26 10K P6.A C50K C22 cw .022 P6.B cw C50K R100 470 R35 1.5K R34 4.7K .022 6 5
A4.B
H1-5 R51 R50 47K 47K 6 5
A5.B
BALANCED OUT +
R24 22K
C21 DEEP S2 7 R44 15K C25 .047 R45 33K 2
A5.A
R49 270
R5 82K C4 82pF C6 1 .022 R101 10K R7 3.9K 3 + 2
R9 560 R8 2.2K C9 10 R10 10K
A2.A
BRIGHT S1 R18 Q2 J175 1M R16 56K C12 27pF 6
A1.B
Q3 J175 C13 R19 C15 .01 B R20 47K C51 R102 470K 6 5 560pF
A2.B
+
R52 H1-6 7 270
BALANCED OUT H1-7 R103 47K
+
C49 10
FULL RANGE
.0033 10K R21 1K P2 A100K C16 C14 7 10 R22 2.2K 3 R82 2 82pF
A3.A
+
C48 1
10 R70 6 5 +
A8.B
H1-8 470 R72 N/U C38 27pF R73 100K 6 5
A7.B
1
C8 .22 R12 56K
C15 ON PCB
VOLUME
BI AMP OUT
.0033 1K R2 1M
R6 3.9K C5 10pF C7 .22
R11 33K Q1 J175
3
+
OP1.B 1/2
R71 7 N/U
H4-1 H4-2 V+ OP3.B N/U H4-3 H4-4 H4-5 H4-6 H4-7
R27 33K R29 R36 4.7K C23 560pF R38 10K 6
R13 56K C11 .01 R14 R75 56K C10 .01 R76 220K C47 330pF 2 3 V+ FOOTSWITCH R92 680 R93 680 R94 680 R96 10K 5 H2-6 R95 10K J12 H2-8 H2-7 7 U1 6 B 9 U1 10 U1 12 15 U1 14 8 B E E V R84 1K 3 2N5550 Q6 U1 2 G U1 4 G C35 10 B 1 V+''
A9.A
5 R15 1M B
+
7
+
C17 1 10
R28 3.3K TREBLE
330pF
OP2.B 1/2
+
R17 22K 10K D2 D3 D4 C44 .047 2
A7.A
cw 3.3K P4 B50K R30 3.3K
R69 6.8K
EQ
R41 0.5 1
V D10 7 N/U C39 N/U + R74 N/U
H4-8
E
IN
V+' C20 .0022 R83 1 1K LED2
5
A3.B +
R37 7 10K
2 3
A8.A +
+
1M
E 4
C24 10 R39 10K R40 10K Q4 J175 Q5 J175
R42 10K C45 10 R43 10K R53 2 3 G R57 18K 2 3 cw P7.B CROSSOVER FREQ R59 POWER 1.5K R47 1M C26 .01 B C27 .01 B 4.7K C28 330pF R54 10K
A6.A
OP3.A N/U
B SUSTAIN
P8
cw
A100K C33 C32 1 10 180pF R77 3.3K V' R85 300K 6
A9.B
R80 10K
C58 10 B
3
+
B 6 5 + R56 7
B
R81 2.2M V+ OP1.A 1/2 B R99 10 C42 470/16 R105 Q7 68 C53 470/16 A9.8 + V+'' +
A6.B
H2-1 68 H2-2
R46 B G 1M
+
R55 68
N/U J5
1 C31
+
5 B R78 N/U C55 .22 C57 .1
+
D1 7 C34 10 B
Q8 R107 9.1K B R79 2.2K V+' R90 10K C46 6 R88 N/U
A10.B
680pF PHONES
R58 10K
R104 68 C52 470/16
B C29 A10.8 V+'' R106 1K LED3 0.1 cw P7.A C50K 0.1 + C30
A11.A
HI 1
R61 270
C50 10 P10 B50K H2-3 HI LEVEL C54 56pF R64 HI OUT
1 3
2
+
THRESHOLD P9.A P9.B cw C36 2 3 B C50KX2 .0022 R86 15K D5 1 C37 47/63 B B OP2.A 1/2 R87 1K
R97 B V+ 10 C40 470/16 R98 LED1 V 10 C41 470/16
B V+' +
C56 .022 R60
D6 D7 D8 D9
B V' + B
1.5K R62 0.5 R63 18K R65 18K R66 18K
11
A10.A
+
1K
5
+
R91 7 1K
18K 6
A11.B
R68 H2-4 7 270 LOW LOW OUT
R89 39K B B H3-3 H3-4 H3-5 H3-6
5
+
R67 10K H3-7 H3-8 H3-2
H2-5
PCB 30-02091
H3-1
FULL RANGE OUT
1
3
2
FS36-XLR (FOOTSWITCH) CH: VOL BOOST EFF1: EFF LOOP EFF2: GRAPHIC EQ
N/U A GND B GND
V+
V LAST USED LIST SYM A C D H J LED OP P Q R S U 30-02091 11 58 10 4 2 3 3 10 8 107 2 1 Off PCB Not Assigned
CARVIN
DRAWN BY:
1155 INDUSTRIAL AVE. ESCONDIDO, CA 92029 (619) 747-1710 FAX 747-9065
5. A11 IS A 5532 TYPE OP AMP. 4. CAPACITOR C58 IS A SECONDARY OPERATION, SOLDERED TO R80 AND A NEARBY VIA. 3. B GROUND IS NOISY GND AND A GROUND IS LOW NOISE SIGNAL GND. ALL GROUNDS ARE A UNLESS OTHERWISE SPECIFIED. 2. U1 IS: CD4049B. 1. ALL DIODES ARE TO BE 1N4003. NOTES: UNLESS OTHERWISE SPECIFIED. CH. EFF1 EFF2
43
PRO BASS PRE-AMP PCB SCHEMATIC
C. MCEUEN
DATE:
1 FEB 90
12
6
APPROVED: DATE:
1
MODEL PB500 PB200 PB15 LAST PCN: 349
PWR XFMR 15-50098 15-20071 15-00428
PWR MOD 80-14028 80-02018 80-02154
PCB NO: ASSY. NO: REVISED BY:
30-02091 80-02091 John L. Murphy
REV:
E K 5OCT93
REV:
DATE: