Read JBL GT-BassPro12 Service Manual online
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Title
Number
Revision
Size
A3
Date:
20-Aug-2011
Sheet of
File:
E:\wen\歌乐系列\XR.DD B
Drawn By:
GT-BassPro12.PRE-SYSTEM.SCH3
C38
473
GAIN
LPF
1
3
2
VR3A
B20K
2011.08.19
R125
470R 1/4W
C35
47P
R97
33K
R101
15K
R102
15K
R98
33K
L+
C34
47p
R124
47k
47k
L-
-15V
+15V
R131
1K
40Hz～200Hz
R121
300R
3
2
1
8
4
U5A
JRC4558
R108
1K8
1K8
R106
47K
R107
47K
C40
101
C47
10u/25
C53
153
R105
100K
100K
C37
104
R133
12K
R129
12K
R147
1k
R112
15K
3
2
1
8
4
U4A
JRC4558
5
6
7
U5B
JRC4558
-15V
+15V
BASS BOOST
0~12dB
1'
3'
2
'
VR1B
C100K
C100K
1
3
2
VR2A
B20K
B20K
C44
4U7/50
C43
4U7/50
R128
470R 1/4W
R100
33K
R99
33K
R+
R-
C46
4U7/50
C45
4U7/50
R178
680R
680R
R177
6K2
6K2
LED
G-R
G-R
1
3
2
W5
20KB
20KB
REM.pow
REM.pro
R117
100K
R130
20K
20K
R111
5K6
at45Hz
REMOTE
D18
4148
D17
4148
D15
4148
4148
D16
4148
1
2
3
sw1A
SW6*8
R79
4K7
D13
4148
C33
220U/16
C48
22U/16
C39
471p
471p
5
6
7
U4B
JRC4558
1
3
2
VR1A
B20K
B20K
R132
10K
10K
C50
154
SUB
C55
154
25Hz
R115
220R
R116
18k
R104
100K
100K
R119
100R
R114
10K
C36
102P
102P
1
2
3
sw2A
SW6*8
R110
10K
R109
10K
L+R OUT
3
2
1
4
1
1
U3A
TL074
5
6
7
U3B
TL074
10
9
8
U3C
TL074
12
13
14
U3D
TL074
-15V
+15V
PHASE
180
0
3
2
1
8
4
U6A
JRC4558
5
6
7
U6B
JRC4558
L IN
R IN
C61
1u/50
R143
47k
R144
100k
R142
47k
R141
100k
100k
C54
33P
C60
1u/50
C58
1u/50
R140
47K
R137
100k
C49
33P
R138
47K
R139
100k
100k
C51
33P
C59
1u/50
RCA1-3
RCA1-4
R134
47R
47R
R146
1K
R136
150K
R119
150K
R135
47R
47R
C57
33P
R145
1K
-15V
+15V
ONLY(IN HI LEVEL INPUT MODE)
AUTO TURN
ON
OFF
HIGH
INPUT LEVEL MODE
R76
100K
HI LEVEL ON/OF
R113
100R
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