BASSPRO SL (serv.man2) - JBL Car Audio Service Manual (repair manual). Page 9

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CIRCUIT DIAGRAM - PRE AMP BOARD
C18
100u/16V
C19
100u/16V
P04
+15V
P01
+15V
-15V
P03
B0V
+12Va
B0V
U03B
LM324
R16
10K0
C21
470p
C22
470p
R17
10K0
U03C
LM324
U03E
LM324
1
3
D03A
BAV99W
3
2
D03B
BAV99W
3
2
D04B
BAV99W
1
3
D04A
BAV99W
C20
CC104
B0V
+12Va
R18
47K
+12Va
C26
470p
R23
10K0
R22
10K0
R21
1K
R19
47K
B0V
+12Va
+6Va
+6Va
+6Va
B0V
C25
47u/16V
B0V
U03D
LM324
R20
100
B0V
C24
470p
Q01
2N3906
Q02
C1815
U03A
LM324
C27
470p
R25
470K
R24
10K
1
3
D05A
BAV99W
3
2
D05B
BAV99W
R28
10K
R27
10K
+12Va
R29
1K
C28
47u/25V
B0V
+6Va
+6Va
R26
10K
Q03
C1815
Auto
Auto
U01B
LM324
R03
10K0
C07
470p
C08
470p
R04
10K0
1
3
D01A
BAV99W
3
2
D01B
BAV99W
3
2
D02B
BAV99W
1
3
D02A
BAV99W
+15V
-15V
R01
10K0
R02
10K0
U01A
LM324
C09
MC104
C10
MC104
R05
91K
R06
22K
U01D
LM324
C11
MC823
C12
MC823
R07
91K
R08
22K
U01C
LM324
C15
470p
R10
10K
R09
51K
C13
MC274
R12
91K
R11
3K6
C14
MC274
U02B
4558C
R13
1K
R14
8K06
U02A
4558C
C16
MC823
R15
8K06
C17
MC334
U01E
LM324
C01
CC104
C02
CC104
U02C
4558C
C03
CC104
C04
CC104
+15V
-15V
Out
Out
Xover1
Xover1
Xover2
Xover2
Xover3
Xover3
Boost3
Boost3
Boost2
Boost2
Boost1
Boost1
BSinA
DBSA
Ain+
Ain-
Aout
DBSB
BSinB
Bout
Bin-
Bin+
-V
BFinA
BFOPA
BFOPB
BFinB
+V
U04
NJM13700
-15V
C31
CC104
C32
CC104
R30
10K
C30
CC106
R36
68K
R35
10K
R34
510
R33
510
R32
15K
R31
8K2
C29
10u/16V
R37
1K
Q05
C1815
+15V
R39
7K5
C33
CC104
R40
120K
Q04
A1015
+15V
R38
1K
D06
1N4148
R41
10K
C34
10u/16V
C23
10u/10V
C06
10u/16V
C05
10u/16V
To Input P04
To Input P03
To Power P04
C35
10u/16V
Q06
C1815
R42
6K8
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