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1 2 3 4 5 6 7 8
BASS
CA11
R35 VR4 R33
10UF
CA16 R3 C1 D2 D1 U1A R11 10K 18K 100KB 18K
U1B VCC
47UF 1K 100PF 4148 4148 4558DD
D PH1 4558DD CA14 D
+
8
3 10UF C28 C26
1 5 MIC
+
C8 473 473
MIC
+
2 7
6 R15
CA10 100PFVSS C10 47PF
R1 10UF
INPUT 10K R34
4
1K
VR1 6 10K CA3
4
CA17 R2 C4 7
+
10KA 10UF
47UF 1K C2 100PF 22PF VSS 5 2 MASTER
U2B
+
1 VDD
4558DD C22 3 R13 U3B
8
R6 100K 222
8
+ U3A 100K 4558DD
R4 1K VCC 5
4558DD VR5 7
C3 10KA 6
473 R32 VR3 R27
R7 3.3K 100KB 3.3K
4
PH2 1.2K R5
1.2K TREBLE VSS
CA19 R9 C5 D4 D3 U2A
10UF 22K 47PF 4148 4148 4558DD
CA12 CA2
3 RA1 RA2 LOWCUT
10UF 10UF
LINE 1K
+
1 1K
+
LINE R8
2
R21
+
C
INPUT CN1 22K 10K
C
VR2
CA13 R12 10KA LD2 LD1 R36
10UF 22K C9 47PF BLUE RED 100K
+
R10 22K SW1
CN2
PARALLEL
R17 2.2K R19 2.2K
U4A C13 U4B VCC
C12 103 C15 103 4558DD 103 C14 103 4558DD CA9
8
3 10UF
1 5
+
2 7
R20 6
4.7K R18
4.7K R14
4 100K TO TRANSFORMER
B VSS C6 C7 C11 C25 CA5 RA4 CA1 B
104 104 104 104 1000UF 150 1000UF 3P CONNECTOR
VCC H2
R22 9.1K R25 9.1K
ZD2 1
2
U5A 15V
C16 104 C19 104 C17 U5B VCC 3
4558DD 104 4558DD CA7
C18 104
8
3 10UF
1 5 ZD1
+
2 7 BD1
R26 6 15V
R23 W06M
18K R24 VSS
18K
4
100K C27 CA6 RA3 CA4
VSS 104 1000UF 150 1000UF
H1
C20 103 C23 103 1 TO POWER
2
3
AMP INPUT
R28 U6A U6B VCC
15K R31 15K 4558DD R29 CA8
4558DD 3P CONNECTOR
15K
8
3 R30 15K 10UF
1 5
+
2 7
C24 6
472 C21
R37 472 R16
A A
4
47K 100K
VSS
AMERICAN AUDIO DATE: 91.03.28
FILE: SPK.PREAMP Drawn By:
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
R49 C32 U7 B
22K 47PF 4558DD
5
R42 C30 C29 D12
7 RA39
H6 6 464K 27PF 152 4148 RA32 RA33
R45 1K
1 RA37 4.7 220 0.22
2 22K
3 R56 10K Z2 5.6V
C35 47PF TOROIDAL
D QA13 TRANSFORMER D
CA39 10000UF
R45 22K R50 22K R60 ZD11 A1186 46V
75 15V QA11 FOR HI FREQUENCY
C33 27PF CA36 C3421
100UF D7 SPEAKER 23V POWER
DA5 C31
4148
8
V+1 R60 4936 222 SWITCH
3 RA40 5.6
39K 1 R47 RA29 0V
2 680 3.3
R55 D8 4148 D9 4148 DA6 BD3 5A\ 250V
2.2K 4936 BD4 RS806 23V
4
U7A RS806
9
L1 CA35
12
D6 4148 D5 4148
11
14 4558DD R48 RA30 AC
R43 563
1.8K 3.3 46V
CA38 10000UF
820 INPUT
15 C34
D11 24V
13 TV2 223 QA10 RA35
4148
5.6
6
16
R54 500 A1358 0V
R53 LD7
10
U8B 100 QA12
R57 100 RED
LM13600 R40 820 C2837 24V
10K
R4110K Z1 5.6V 15V
C38 104 BD2
R38 RA39 0V
RA36 RA31 RS806 TO PREAMP
100 1K
Q1 RA34 220 0.22 H2 CONNECTOR
R52 820 22K 15V
3906
R58 CA33 CA33 ZD10 R39
150K 100UF 100UF 15V 10K
CA32
D10
V-1 224
4148
D? DIODE
C C49 47PF R51 C
220K D13
CA27 R64 560K 4148
R104 47
10UF
R94 4.7K ZD5 3.9V QA2
R101 Q6 Q2
5.9K 3904 IRFZ44 R66
D24 3904
R95 470K 1.5M
4148
R91 U11 LM311 D23 4148
150K R92 4.7K CA30
1 8 R102
12K CA21 22UF
R88 2K 2 7 10000UF
Q9 CA25 R77
3 6
R96 3K 100UF Q4 ZD9
3906 15K
4 5 3904 3.9V
C45 R87 RA14 3K
332 RA22 150K
ZD4 10V 90 O
12K
SWITCH
R73 C37 U9B 90 O
22K 47PF SWITCH D1
4558DD R83 4148
5 R59 220K
7 464K C40 RA24 DA2 U15A20
C41 D15
R63 6
27PF RA19 RA26 RA17
RA28 4.7 152 4148 1K
22K ZD6 220 0.22 0.22
R71
10V Z4 5.6V RA9 CA23
R79 10K
C36 47PF 1.5 104 470K
Q3
ZD7 R75 3906
R62 22K R72 22K R82 15V 220K
75 RA13 LD5
C39 27PF CA28 3.3K
QA5 QA8 QA4 RED
B V+1 100UF DA4 QA9 R61 B
C4739 A1186 A1186
8
4936 FOR LOW FREQUENCY C3421 6.8K
3 RA46 RA5 5.6
C43 RA20
1 2.2k CA19
R69 R65 2 222
3.3 10000UF
SPEAKER
D21 4148 D20 4148 DA3
39K 2.2K 4936
4
U9A
8
D19 4148 L2 CA26
3 4558DD RA21
5
R80 563 RA7
CA20
820 C42 3.3 1K
2 D18 10000UF
4148 223 QA5 QA7 QA3 RA8
4 TV1 A1837
R68 C2837 C2837 5.6 D25
1
LD6 500 RA15 LD4
R67 100 4148 LD3
7
U8A 3.3K RED
100 RED SIGNAL
R70 LM13600 R81 820
10K
RA10 CA24
R78 Z3
1.5 104
R84 10K 5.6V
100 RA16 RA23 RA12
Q5 RA25 RA27
R74 R76 220 0.22 0.22
CA31 47K 1K DA1 U15A20
150K 3906
100UF 820 CA29 ZD8
100UF 15V
V-1
D16 4148
R100 150K
R99 C47 47PF
C44 R86
RA18 R85 47K C46 47PF 5.9K
332 2K
CA18 10000UF
12K RA11
R89 470K D22 4148 Q8
3K