BOSE SD187917 2 06 Schematic
C
B
A
DYNEQ1
EQGND
DYNEQ2
8
C335
0.22
M39
R301
2.43K
R303
100K
R334
100K
M38
R362
4.99K
CH.2
BASS BOOST
ADJUST
(50-150HZ)
4.99K
C318
1/50V
R336
4.99K
R370
10.0K
9
U300
10
C360
1/50V
R310
TP73Z
9
10
DYNAMIC EQ LEVEL DETECTOR
M137
R391
0
3
R4
20K
2
CH.1
1
BASS BOOST
ADJUST
(50-150HZ)
R392
OPT
-12V
R300
TP54
47.5K
Z
R302
TP53 Z
100K
R304
D300
MMBD914
10.0K
1
R309
R389
OPT
OPT
1
R332
2.43K
-12V
R331
TP72Z
47.5K
TP71
R333
Z
100K
R335
D306
10.0K
MMBD914
1
3
R5
20K
2
1
7
HIGH PASS FILTER(150HZ)
R368
OPT
TP51 Z
C340
C334
0.22
0.22
TP55Z
4
8
NJM2059
11
DYNAMIC EQ LEVEL DETECTOR
4
U301
NJM2059
11
M138
C339
0.15
C349
OPT
R371
4.99K
TP56 Z
TP81 Z
TP80
8
TP57
M131
M133
R372
10.0K
Z
M132
C302
10/35V
Z
D305
BAV70L
M134
C319
10/35V
C338
0.12
R364
30.1K
+12V
D301
BAV70L
BAV99L
2
U306
3
-12V
D302
BAV99L
D304
R369
0
C337
0.1
8
1
NJM4559
4
C341
0.1
C303
10/35V
Q300
MMBT3904
R305
R306
1M
20K
C320
10/35V
Q304
MMBT3904
R339
1M
R338
20K
R386
4.02K
R366
40.2K
R365
30.1K
BANDPASS FILTER (50-150HZ)
R390
OPT
S4
HPF OUT
TS21
F
HPF IN
M48
M136
M135
C342
R373
4.99K
0.15
C348
OPT
Q302
MMBT3906
Q301
MMBT3906
-12V
TP84
Q305
MMBT3906
R337
20K
-12V
C336
.033
R307
20K
TP59
TP60
Z
Z
Z
TP62 Z
TP83Z
R367
14.0K
R308
5.62K
R311
10.0K
TP61
Z
R313
10.0K
Q306
MMBT3906
R340
5.62K
R341
10.0K
TP85Z
M41
TP58Z
M40
TP82Z
6543 1
(FOR MODEL 1B/70V SYSTEMS)
C343
R378
40.2K
0.12
R377
R376
30.1K
30.1K
BANDPASS FILTER (50-150HZ)
DYNAMIC EQ VCA
TP63Z
-12V
C304
0.1
4
3
R312
U302
2
TP86
R342
1.0K
R343
10.0K
1.0K
Z
+12V
R363
26.7K
TP94
C346
.033
C305
0.1
C321
0.1
C322
0.1
Z
CA3080E
7
+12V
R330
10.0K
R357
47.5K
DYNAMIC EQ VCA
-12V
TP87
Z
4
3
U303
2
CA3080E
7
+12V
R387
30.1K
6
U301
5
5
5
4
NJM2059
11
M49
R381
4.02K
R374
26.7K
R379
14.0K
C344
.033
TP64
Z
Z
TP65
6
R314
C306
OPT
8.25K
R316
4.99K
55 HZ BANDPASS FILTER
(THIS FILTER ENGAGED WHEN
C333
TP88Z
Z
R344
8.25K
TS27
F
7
BEDROCK EQ. IS INSTALLED.)
C323
OPT
M46
4.7/35V
TP89 Z
TP98
6
R380
30.1K
TP52Z
4
6
U300
5
NJM2059
11
C345
.033
C307
1.8nF
R315
301K
4
13
14
U300
12
NJM2059
11
TP66Z
C324
1.8nF
R346
301K
4
13
14
U301
12
NJM2059
11
TP90Z
R345
4.99K
55 HZ BANDPASS FILTER
(THIS FILTER ENGAGED WHEN
BEDROCK EQ. IS INSTALLED.)
R384
6.19K
R382
6.19K
TS22
F
7
M47
R393
OPT
90 HZ BANDPASS FILTER
(THIS FILTER IS ALWAYS ENGAGED,
EXCEPT WHEN MODEL 1B EQ. IS INSTALLED.)
M43
C312
0.15
C328
0.15
C310
0.15
C327
0.15
C309
.068
R320
26.7K
C329
.068
R349
26.7K
R318
C308
100K
10/35V
R317
100K
C311
0.1
90 HZ BANDPASS FILTER
(THIS FILTER IS ALWAYS ENGAGED,
EXCEPT WHEN MODEL 1B EQ. IS INSTALLED.)
M42
C325
10/35V
R347
100K
R348
100K
C326
0.1
TP95Z
R321
4.64K
R354
4.64K
TP68 Z
TP67 Z
TP92 Z
TP91 Z
R356
26.7K
R323
4.22K
R319
25.5K
R351
4.22K
R350
25.5K
R385
26.7K
R352
14.0K
NJM2120
2
3
7
6
C313
R322
6.81K
2
3
7
6
R355
6.81K
8
6
U306
5
4
R325
14.0K
R324
6.49K
C314
+INA
-INA
+INB
-INB
0.1
R353
6.49K
C330
+INA
-INA
+INB
-INB
C331
0.1
TP96Z
NJM4559
SPARE
0.1
8
VCC
VEE
4
0.1
8
VCC
VEE
4
+12V
U304
OUT
SW
-12V
+12V
U305
OUT
SW
NJM2120
-12V
7
M148
C408
0.1
R414
10
1W
M169
M54
J403
OPT
87654321
M55
AMP MODE SWITCH
J405
M102
M101
M99 M100
12345678
M151
M53
TP70 Z
C315
47pF
R327
6.19K
+12V
TP69
Z
R326
2.00K
TS23
F
TS25
F
M45
R358
2.00K
5
1
M44
5
1
OPT
R388
C347
TS24
0.1
4
2
U300
3
NJM2059
11
C301
0.1
-12V
C332
47pF
R359
6.19K
+12V
C316
0.1
4
2
U301
3
NJM2059
11
C317
-12V
F
1
M51
R328
0
R329
OPT
M172
M52
C409
0.1
TS26
F
1
M50
R360
0.1
0
R383
OPT
TP93 Z
R415
10
1W
J404
OPT
M88
M104
M87
M103
POWER AMPLIFIER OUTPUTS
XFRCT
XFRCT
CH2(-)
CH2(+)
CH1(-)
CH1(+)
R700
100K
R701
100K
M58
J6
70V/100V (+)
70V/100V (-)
M143
M147
+40V
C700
10/35V
TP118 Z
S6
br.
1
2
3
2ch
S6
br.
4
5
6
2ch
M156M155
2
M142
M146
M150M149
TP130
Z
R714
R715
20.0K
R703
M56
R716
0.1
OPT
C701
+12V
-12V
20.0K
R717
20.0K
Z
TP120
2
3
TP113Z
R704
1.0M
R702
20.0K
R710
30.1K
TP116 Z
J406
OPT
J407
M59
G5
D703 BAV99L
20.0K
M57
LEVELER1
1
M77
+40V
M140
M141
M81
+20V
-20V
M82
-40V
+12V
-12V
U700
8
4
NJM4559
MMBD914
D700
R707
OPT
M161 M162
M170
J409
100V CONSTANT
M144
M145
M78
M152
M83
M153
M84
-40V
TP125 Z
+12V
TP117Z
R705
1
+12V
8
2
U701
3
1
4
-12V
-40V
+12V
-12V
J410
10K
C705
0.1
7
65
NJM311
C706
0.1
+20V
-20V
M167 M168
M171
3
2
1
+12V
TP123
+40V
M164 M163
M166M165
M173M174
M176M175
J400
6
5
-12V
Z
188600
120V JUMPER230V JUMPER
CONFIGURATIONCONFIGURATION
J409
70V CONSTANT
VOLTAGE OUTPUTVOLTAGE OUTPUT
AmPlus 100 Amplifier
J7B
1
2
3
4
CONNECTS TO J7A
5
6
CHANNEL 1
7
POWER AMPLIFIER
8
SHT.3
9
10
11
12
M63
CLIP/SC1
R706
10.0K
C704
100pF
C702
0.1
U700
C703
0.1
TP127 Z
M64
M177
7
Z
TP124
MMBT3904
1
2
3
4
5
6
7
8
9
10
11
12
CLIP/SC2
J410
1
RELAY LATCH-UP
D702
MMBD914
Q701
R713
1.0K
LEVELER2
1
J8B
CONNECTS TO J8A
CHANNEL 2
POWER AMPLIFIER
SHT.3
1
J401
1
2
3
4
DC OFFSET DETECT
MMBD914
70V Out
100V Out
M154
8
4
NJM4559
R708
10.0K
R711
1.0K
M157 M158
M160M159
FRAMINGHAM, MA 01701-9168
TM
TP126Z
D701
R709
10.0K
M60
M97
M61
J409
100V
TP128
-12V
TP112Z
Z
3
MMBT3906
Q700
R712
20.0K
TP129Z
C707
4.7/35V
J410
70V
RELAY
M62
M98
DD
C
B
R
A
Service Manual P/N: 194101 Rev. 00
2345678
PCB 187917-001, 2
Rev. 5 Sheet 2 of 3
1
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