BOSE SD262087SH1 Schematic
A
+15V
C578
0.1
C579
0.1
C580
0.1
C581
0.1
-15V
1
2
Cable to
Input Module
P100
3
4
J800
5
6
Cable from Interface Assy
A
+15V
-15V -15V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
SND2COM
2
SND2HOT
3
RCV2NEG
4
RCV2POS
5
SW1:EFL2
6
SW2:CLC2
7
SW3:HPF2
8
SW4:FREQ2
9
SW5:EFL1
10
SW6:CLC1
11
SW7:HPF1
12
SW8:FREQ1
13
REM_VCA_5V
14
15
POWERUP
16
PWRGND
17
+15V3
18
19
REM_VCA_CH2
20
REM_VCA_CH1
21
22
23
RCV1NEG
24
RCV1POS
25
SND1COM
26
SND1HOT
+15V
POWERUP
TEMP1
TEMP2
C582
10/35V
C583
10/35V
+15V2
-15V2
DRIVE_OUT_CH1
DRIVE_OUT_CH2
SND1HOT
SND1COM
-15V
RCV1NEG
RCV1POS
-15V
R593
10.0K
R594
10.0K
D500
D501
BCD EFGH
D502
D503
R595
3.32K
1/4W
SND2HOT
SND2COM
-15V
RCV2NEG
RCV2POS
-15V
+15V
RN500:A
22K
RN500:B
22K
RN500:C
22K
RN500:D
22K
+15V
+15V
C573
10/35V
t
R596
1K
C575
OPEN
C501
10uF/100V NP
C500
10/100V BP
C574
OPEN
D504
D505
B
D506
D507
R500
100
R501
100
t
R597
OPEN
RN500:H
RN500:G
RN500:F
RN500:E
5%
5%
C502
C503
22K
22K
+15V
22K
22K
+15V
R503
10.0K
R502
10.0K
56PF
56PF
t
R504
10.0K
7
R505
10.0K
1
2
3
R598
OPEN
C506
33PF
6
-
5
+
C507
33PF
+15V
2
8
-
3
+
4
-15V
+15V
8
1
+
4
-15V
U500:A
NE5532P
Thermistor tracks
amplifier heatsink
temperature
R509
10.0K
R506
5%
100
R508
10.0K
R507
5%
100
C504
56PF
C505
56PF
10uF/100V NP
+15V
8
1
4
-15V
7
6
-
5
+
U500:B
R510
OPEN
U501:B
NE5532P
U501:A
NE5532P
C508
C577
OPEN
C509
33PF
2
-
3
+
C510
33PF
6
-
5
+
7
NE5532P
R511
10.0K
R512
OPEN
U502:A
NE5532P
U502:B
NE5532P
C511
10uF/100V NP
C576
OPEN
C
R515
2.21K
R513
2.21K
R517
47K
5%
SW5:EFL1
C514
0.1
C515
0.1
R514
C520
47/16V
C516
330PF
R522
2.21K
+15V
U503
8
3
-
NJM2120L
A
2
+
1
A/B
6
-
B
-15V
R521
47K
4
5%
Control
Control
A/B
+15V
+15V
C527
0.1
C528
0.1
3
2
1
6
7
C517
47/16V
C519
330PF
R523
2.21K
+15V
-15V
7
+
C513
0.1
CH1 Effects Loop
C521
0.1
C522
0.1
CH2 Effects Loop
SW1:EFL2
R516
47K
5%
R520
2.21K
R518
2.21K
R519
5%
47K
C512
0.1
SEE NOTES PAGE 2
G r o u n d i n g S y m b o l K e y
10.0K
OPEN
C532
R528
5%
1K
5
+15V+15V
C536
10/35V
C537
10/35V
-15V-15V
C518
330PF
+15V
U504
8
-
NJM2120L
A
+
-
B
+
4
-15V
R525
2.21K
R524
5%
1K
C h a s s i s G n d
I n p u t G n d
P o w e r G n d
C526
R533
5%
100K
0.1
2
8
-
3
+
4
U505:A
C533
0.1
C560
R571
121
0.1
U511
2180
R569
1
10.0K
4.99KR4374K
-15V
Distortion Trim
(used w/ 2150A, 2181)
+15V
-15V
R526
2.21K
5
C525
330PF
D508 1N5236B
100KR529
6
-
5
+
U505:B
BA4560
D
1N5236BD509
+15V
1
BA4560
-15V
+15V
7
V+
V-
5
CH1*
1
R1 50K
C541
0.1
C542
0.1
U518
2180
R5
4.99K
-15V
C529
5%
3
Ec-
SYM
4
C563
R570
10.0K
7
Ec+
R6
2
+15V
-15V
0.1
OPEN
1K
R607
6
R542
3
CH1*
51.1
2
CW
R572
121
CH2*
D510
R550
5%
8
+15V
C546
0.1
C547
0.1
+15V
7
V+
1
V-
5
1
Distortion Trim
(used w/ 2150A, 2181)
R546
1K
C544
0.1
R605
0 Ohm
+15V
-15V
3
Ec-
SYM
4
2
5%
2
3
Ec+
6
R527
374K
3
50KR2
D511
C545
47K
5%
C565
33PF
R568
36.5K
+15V
8
-
+
4
-15V
U512:A
BA4560
C549
0.1
C550
0.1
U514:B
BA4560
CH2*
R606
51.1
2
8
CW
+15V
0.1
1
R604
0 Ohm
+15V
-15V
R575
12.1K
R551
47K
R552
47K
5%
F2: 122Hz
7
6
-
5
+
5%
R553
47K
5%
SP-LED1
R556
1.5K
1/4W 5%
F1: 79.5Hz
C523
0.1
C524
0.1
C553
10/35V
C554
10/35V
C568
0.47
6
-
5
+
R585
OPEN
C566
33PF
R573
36.5K
U512:B
BA4560
Q501
2N4401
R531
R532
+15V
-15V
7
SP-LED2
E
R534
15.4K
C530
0.1
20.0K
C531
0.1
13.0K
R555
1.5K
1/4W 5%
Q500
2N4401
R599
16.5K
R536
R535
C570
0.47
R581
12.1K
+15V
U514:A
BA4560
2
8
-
1
3
+
4
R589
OPEN
+15V
-15V
C540
0.1
0.1
0.1
8
4
R547
47K
D512
1N4148
10/35V
A L
C564
100PF
R545
R544
U506
NJM2120L
5%
C558
321
R543
47K
5%
R549
9.09K
20.0K
13.0K
R574
16.5K
PWRGND
5
-15V
R539
9.09K
100PFC561
3
-
A
2
+
1
A/B
6
R541
47K
C569
1/50V
5%
Control
7
+15V
R588
100K
R587
100K
-
B
+
20.0K
13.0K
SW8:FREQ1
CH1 Filter Frequency
JP402
CH2 Filter Frequency
Control
SW4:FREQ2 SW3:HPF2
R540
15.4K
F1: 79.5Hz
C534
C538
0.1
R537
20.0K
C535
C539
0.1
R538
13.0K
F2: 122Hz
R602
402
A/B
C543
+15V
1N4148
U510
78L15
R548
47K
5%
0.1
D513
3
2
1
6
7
C571
1/50V
2
-
A
+
-
B
+
C548
0.47
13
CH2 HP Filter
+15V
8
4
-15V
F
JP401, JP402 LEVEL
CONTROL CONFIG
Audio Taper
Linear Taper
A
R558
15.4K
C551
0.47
13.0K
R557
CH1 HP Filter
Control
REM_VCA_5V
D514
1N4148
U507
NJM2120L
5
L
321
13.0K
SW7:HPF1
R560
47K
5%
R603
402
R564
9.09K
C562
100PF
A/B
R562
47K
5%
REM_VCA_CH1
REM_VCA_CH2
C552
0.47
R561
R586
5.49K
C555
0.47
13.0K
7
6
1
2
3
R579
2.49K
C556
R559
15.4K
+
B
-
+
A
-
-15V
R592
5.49K
0.1
C584
100PF
R565
-15V
+15V
C557
0.1
R580
2.49K
4
8
-15V
13.0K
R563
47K
5%
R567
47K
D516
U508
NJM2120L
5%
+15V
+15V
R566
9.09K
+15V
R576
6.81K
+15V
C567
10/35V
R583
1.02K
D518D515
R577
4.99K
C587
10/35V
R582 1.02K
R578
4.99K
D519
-15V
U509
7
4
NJM2120L
+
B
6
-
2
+
A
3
8
+15V
5
-15V
A/B
JP401
R591
100K
R590
100K
F3: 26Hz
R554
C559
10/35V
Control
+15V
F3: 26Hz
Service Manual Part Number 216306 Rev. 00
G
3
5
C588
10/35V
51
2
3
R490
0 Ohm
3
21
JP403
654
R491
0 Ohm
U516:B
VTL5C4
D517
1N4148
U513
78L15
3
1
C572
2
10/35V
+15V
D520
8
1
+
4
U515:A
BA4560
-15V
7
U515:B
BA4560
3
U517:B
VTL5C4
5
D521
6
5
R584
6.81K
-
+
Model 2150 Amplifier
Signal Processor PCB
Part Number 262087
Sheet 1 of 2
CH2-IN
To J700
Master Level
Control Port
MSTR_VCA_CH1
MSTR_VCA_5V
MSTR_VCA_CH2
To J601
Sht 2
CH1-IN
To J602
Sht 2
H
1
2
3
4
5
6
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