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4
3
2
1
D
TP104 TP106
D
C105
.001 1 TP107 TP218 TP114
C103
FTP33 T6786
1 2
FTP24
.001
R103
4.99K 2 3
C109 R46
10.0K 2 TP112
R101 J1
2.49K
R102
2.49K
C100
TP219 .01
FTP25
C102 J2
4 3 2 FTP28 1 FTP26 22
1/2
U1
1
C212
.27 FILM
C213
.27 FILM
1/2
U2
1
100pF
C107 U5
10 17 L1 18 L2 20 L3 14 R1 13 R2 11 R3 +8V 16 VCC 15 CREF 7 AGND 3 CSM 1 RECOUT_L 2 OUT_L 19 LOUD_L 10 RECOUT_R 9 OUT_R 12 LOUD_R 8 ADDR 4 SDA 5 SCL 6 DGND 2 TP215 TP221 TP220
R117
49.9K
R100
4.99K TP105
3
+
NJM2082
+
NJM2082
C108
TP115 10
R116
3.83K
2 3
U6
+
R45
20.0K
1/4
1 TL074
L_AMP_IN
R105
4.99K
C104
.001 1
R109
N.U. SEE NOTE 13
R112 DATA CLK R111
2.49K 12.1K
TP116
FTP27 FTP30 4 4
1
1 TP113
C111
.33 FILM 10
+ -
TL074
R110
C
FTP32 1 FTP31
N.U. SEE NOTE 13 TP205 TP207
1 TP222
R113
10.0K 9
1/4 U6
8
TDA7309D
R211
2.49K
1
C110
.33 FILM
C
R115
TP117
J3
7 8 5 2 4 1 6 3 TP204
C205 C203
.001 1 .001 TP216 TP212
R210
N.U. SEE NOTE 13
C13
100
R114
10.0K
22.1K
R203
4.99K
R209
N.U. SEE NOTE 13
1
R201
2.49K FTP36 4 T6786
R202
2.49K 6 5
R43
10.0K 6
C14
10
C209
TP214 100pF TP223
1/2
U1
7
C210
.27 FILM
C211
.27 FILM
+
U2 1/2
7
C207
10
TP213
R217 R23
3.83K 49.9K
5
NJM2082
+
NJM2082
C208
10
R216
3.83K
13 12
U6
+
1/4
14 TL074
R_AMP_IN
J1
3 4
C202
22
R204
4.99K
TP206
R44
20.0K +5V
R24
49.9K
FTP35 4 1
R205
4.99K
C204
.001
1
STBY R42
10K
+5V 1
U8
LM393
1
1
1
D11
R48
100K
1/2
2
B
4 FTP29
C200
.01 +5V
R21
2.00K 2 TP24 TP19
2
C185
2
100K
R31
+
R26
2 24.9K
3
RT2
10K TP9
C35
330pF
C36
330pF
TP3
.033
R49
100K
2
R27
+34V 100K FTP60 1
FTP57
C21
TP226 .1 TP14 TP22
R39
1.0K
1
DATA
TP20
BAV99L
TP25
4
MUTE CLK
R47
127K
R20
10.0K
5
R39
1.0K
6
1 2 3 4
U7
R39
1.0K
Q7 R33
200 TP10 2SC2812
TP228
3
8 7 6 5
R32
432
TP1
U8
LM393
7
R19
47K
C20
.001 2
+
1/2
5
8
R39
1.0K
7
TP23 TP18
PIC12C509
TP27
C26
.015
-8V
6
-8V
2
R30
332
TP227
+34V
U1 +8V
U5
R35 C22
.01 4 2 20K
R40
10.0K
C31
.033
C32
.033
RT1
TP21 5 6
FTP42
+
1/4
U6
7 TL074
D6
BAV99L
D9
N.U.
TP16
N.U.
1 TP28
R25
258007
C33
.033 -8V
C34
.033
R
A
+8V
2.49K
-
Q2
N.U.
TP29
D10
Q5
R37
2.00K TP30
Q1
N.U.
FRAMINGHAM, MA 01701-9168
A
BAV99L
R41
2.00K 2
TP229
C15
1.0
TP17
R28
N.U.
R29
N.U.
2
2
Lifestyle Stereo Amplifier PCB P/N: 197341 Rev. 00 Sheet 1 of 2 Service Manual P/N: 257437 Rev. 00
R
4
3
2
1
4
3
2
1
D
C176
1 10 TP102 1.00K 49.9K 12 2 3 4 9 10 11 7
+34V C180 R176
.1 14.7K 1
D
C276
1 10 TP202
R276
14.7K
R277
1.00K
R279
49.9K
FTP44
FTP46
FTP37
R177
R179
+34V
FTP49 FTP45 FTP39
RIGHT_OUT 1 3
C278
.001 LEFT_OUT 2 2 3 4 9 10 11 12 7 13 14 NC3 +VS +PWVS INOUT IN+ IN+MUTE U14 STBY TDA7294 6 BTSTRAP MUTE 5 NC1 NC2 STBYGND -VS -PWVS 1 1 1 1 8 15
C178
.001
13
C175 L_AMP_IN
.15 FILM
R175
2.49K
C177
.001 1 1
R178
49.9K
1
14 NC3 +VS +PWVS INOUT IN+ IN+MUTE U13 STBY TDA7294 6 BTSTRAP MUTE 5 NC1 NC2 STBYGND -VS -PWVS 1 1 8 15
C181
22
C183
.01
R151
4.75 TP103
4
J4 J4 R_AMP_IN
FTP38 FTP47 FTP48
C275
.15 FILM
R275
2.49K 1
C281
22
C283
.01
R251
4.75
J4 J4
FTP40
R180
332 TP108 1
C277
.001
R278
49.9K
R280
332 1 TP203 FTP50 FTP51 3 3
SPEAKER GROUND
C150
.1
C182
3 .1 1 3
SPEAKER GROUND
C250
.1
STBY MUTE -34V
FTP6
STBY MUTE
-34V
C
FROM TRANSFORMER SECONDARY FTP1 FTP52
+34V
C
C3 C5
.033 FTP61 +8V +5V
D3
1N5402
D7
1N5402
C1
.033
4700 50V
C18
.033 FTP3 FTP53
D4
1N5402
D8
1N5402
C2
.033 FTP7
C4
4700 50V
5 TP224 TP225
Q6
2SC2812
J5
1 2 3 4 5 FTP5 FTP54 -34V
C19
.033 2 FTP16 +17V 3
POWER SUPPLY
U11
78L08 2 1 FTP18 +8V
R8
1.00K
U3
3 VCC RESET GND 1
R10
FTP20 2 2K
CLASS
R7
432
MAX809x
SD
S2
FTP22
DWG NO.
FTP2
FTP55
C8
470 25V
C9
10
C11
.1
F1
GND1_3
1 STARGND 2 1 3
+
ON 1
OFF 2
FTP9 2 HOT NEUTRAL
R5 Z1
FTP4 FTP56 5.1,1/4W
FTP21
SLO-BLO
NOTE 12
3
Y1 NOTE 11
1 FTP10
197341
B
R6
5.1,1/4W
-
C184
100 25V 2 -17V 1 79L08 3
C10
10
C12
.1
J6
2
1 GND2_3
1 STARGND 2 2 3
FTP11
NOTE 9
3 115V 1 2 3 230V
BLACK 5 4 WHITE BLUE 1
FTP12
U12
-8V
FTP19
2
S1 S1
FTP13 FTP14 6 230V
3 2 1 ORANGE
YELLOW 2
GRAY
3
NOTES:
UNLESS OTHERWISE SPECIFIED:
1. ALL RESISTORS ARE EXPRESSED IN OHMS AND ARE: 0805 - 1/10W, 1%.
115V
4
5
J7
BROWN YELLOW 4
TO J5
SH
2
BLUE RED
5
2. ALL CAPACITORS ARE EXPRESSED IN MICROFARADS. 3. ALL NON-POLARIZED CAPACITORS ARE CERAMIC CHIPS. 4. ALL POLARIZED CAPACITORS ARE ELECTROLYTICS. 6. IC SUPPLY PINOUTS: TL074 -> PIN 4 = +12V, PIN 11 = -12V NJM2082 -> PIN 4 = -12V, PIN 8 = +12V LM393 -> PIN 4 = -8V, PIN 8 = +8V
7. FTP DENOTES FUNCTIONAL TEST POINTS. 8. TP DENOTES IN-CIRCUIT TEST POINTS. 9. SWITCH S1 USED ON DUAL VOLTAGE VERSION ONLY.
Y2 NOTE 10
DENOTES CRITICAL COMPONENTS. REPLACE ONLY WITH IDENTICAL BOSE PART.
J5: J6:
J7:
XMFR
FTP15
P/N 199800 FOR 115/230V VERSION P/N 197185 FOR 120V VERSION
P/N 133220-05 P/N 146563 (120V, 115/230V) P/N 145306 (220-240V) P/N 172323-5
R
A
10. Y2 USED ON 220-240V VERSION ONLY. 11. Y1 USED ON 120V VERSION ONLY. 12. FUSE VALUE IS 1.6A FOR 120V & 115V/230V VERSIONS, 0.8A FOR 220-240V. 13. N.U. INDICATES "NOT USED". 14. SWITCH S2 USED ON 220-240V VERSION ONLY.
R5, R6: P/N 121243-1215R15 D3, D4, D7, D8: P/N 170219 Z1: S1:
F1:
FRAMINGHAM, MA 01701-9168
P/N 112027 P/N 145307 (115/230V)
P/N 181561-1600 (120V, 115/230V) P/N 177311-00800(220-240V)
A
Service Manual P/N: 257437 Rev. 00
Lifestyle Stereo Amplifier PCB P/N: 197341 Rev. 00 Sheet 2 of 2
R
4
3
2
1
4
3
2
1
D
TP104 TP106
D
C105
.001 1 TP107 TP218 TP114
C103
FTP33 T6786
1 2
FTP24
.001
R103
4.99K 2 3
C109 R46
10.0K 2 TP112
R101 J1
2.49K
R102
2.49K
C100
TP219 .01
FTP25
C102 J2
4 3 2 FTP28 1 FTP26 22
1/2
U1
1 4559
C212
.27 FILM
C213
.27 FILM
1/2
U2
1 4559
100pF
C107 U5
1.0
17 L1 18 L2 20 L3 14 R1 13 R2 11 R3 +8V 16 VCC 15 CREF 7 AGND 3 CSM 1 RECOUT_L 2 OUT_L 19 LOUD_L 10 RECOUT_R 9 OUT_R 12 LOUD_R 8 ADDR 4 SDA 5 SCL 6 DGND 2 TP215 2.49K 1 TP221 TP220
R117
49.9K
R100
4.99K TP105
3
+
+
C108
TP115 10
R116
3.83K
2 3
U6
1/4
R45
20.0K
1 TL074
L_AMP_IN
+
R112
R105
4.99K
C104
.001 1
R109
N.U.
TP116
FTP27 FTP30 4 4
1
1 TP113
DATA CLK R111
2.49K
12.1K
C111
.33 FILM 10
+
1/4
TL074 8
R110
C
FTP32 1 FTP31
N.U.
1 TP222
R113
10.0K 9
TDA7309D
R211
C110
.33 FILM
U6
C
J3
7 8 5 2 4 1 6 3 TP204
TP205
TP207
R115
TP117
C205 C203
.001 1 .001 TP216 TP212
R210
N.U.
C13
47
R114
10.0K
22.1K
R203
4.99K
R209
N.U.
1
R201 R1
FTP36 2.49K
R202
2.49K 6 5
R43
10.0K 6
C14
10 TP213
C209
TP214 100pF TP223
3.16K
1/2
U1
7 4559
C210
.27 FILM
C211
.27 FILM
+
U2 1/2
7 4559
C207
1.0
R217 R23
3.83K 49.9K
5
4 T6786
+
C208
10
R216
3.83K
13 12
U6
+
1/4
14 TL074
R_AMP_IN
J1
3 4
C202
22
R204
4.99K
TP206
R44
20.0K +5V
R24
49.9K
FTP35 4 1
R205
4.99K
C204
.001
1
STBY R42
10K
+5V 1
U8
LM393
1
1
1
D11
R48
100K
B
4 FTP29
C200
.01 +5V
R21
2.00K 2 TP24 TP19 2
C185 C35
330pF
100K
R31
1/2
+
2
3
RT2
10K TP9
C36
330pF
TP3
.033
R49
100K
2 2
R26
24.9K
R27
+34V 100K FTP60 1
FTP57
C21
TP226 .1 TP14 TP22
R39 1 2
TP25 1.0K TP20
DATA
BAV99L
MUTE CLK
R47
127K
R20
10.0K
R39
5 8
1.0K
6
1 2 3 4
U7
4 R39
8 7 6 5 1.0K
Q7 R33
200 TP10 2SC2812
TP228
3
TP1
R32
432
U8
LM393
7
R19
47K
C20
.001 2
+
1/2
5
PIC12C509 TP23 TP18
TP27
C26
.015
R39
1.0K
-8V
6
-8V
2
7
TP227 +34V U1 +8V U5
R30
49.9
R35 C22
.01 2 4 FTP42 5 6 20K
R40
10.0K
C31 R36
1M
C32
.033
RT1
TP21
.033
+
1/4
U6
7 TL074
D6
BAV99L
D9
N.U.
TP16
N.U.
1 TP28
R25
258007
C33
.033 -8V
C34
.033
R
A
+8V
100
-
Q2
N.U.
D10
Q5
R37
499
TP30
TP29
Q1
N.U.
FRAMINGHAM, MA 01701-9168
BAV99L
R41
20.0K
2
TP229
C15
4.7
TP17
R28
N.U.
R29
N.U.
2
2
Service Manual P/N: 257437 Rev. 00
Lifestyle Stereo Amplifier PCB P/N: 197341 Rev. 01 Sheet 1 of 2
R
A
4
3
2
1
4
3
2
1
D
C176
1 10 TP102 1.00K 49.9K 12 2 3 4 9 10 11 7
+34V C180 R176
.001 14.7K 1 1
D
C276
10 TP202
R276
14.7K
R277
1.00K
R279
49.9K
FTP44
FTP46
FTP37
R177
R179
+34V
FTP49 FTP45 FTP39
C278
.001 LEFT_OUT 2 2 3 4 9 10 11 12 7 13 14 NC3 +VS +PWVS INOUT IN+ IN+MUTE U14 TDA7294 STBY 6 MUTE BTSTRAP 5 NC2 STBYGND -VS NC1 -PWVS 1 1 1 1 8 15
C178
.001
13
RIGHT_OUT 1 3
C175 L_AMP_IN
.15 FILM
R175
2.49K
C177
.001 1 1
R178
49.9K
1
NC3 +VS +PWVS OUT 14 ININ+ IN+MUTE U13 TDA7294 STBY 6 MUTE BTSTRAP 5 NC2 STBYGND -VS NC1 -PWVS 1 1 8 15
C181
22
C183
.01
R151
4.75 TP103
4
J4 J4 R_AMP_IN
FTP38 FTP47 FTP48
C275
.15 FILM
R275
2.49K 1
C281
22
C283
.01
R251
4.75
J4 J4
FTP40
R180
332 TP108 1
C277
.001
R278
49.9K
R280
332 1 TP203 FTP50 FTP51 3 3
SPEAKER GROUND
C150
.1
C182
3 .001 1 3
SPEAKER GROUND
C250
.1
STBY MUTE -34V
FTP6
STBY MUTE
-34V
C
FROM TRANSFORMER SECONDARY FTP1 FTP52
+34V
C
C3 C5
.033 FTP61 +8V +5V
D3
1N5402
D7
1N5402
C1
.033
4700 50V
C18
.033 FTP3 FTP53
D4
1N5402
D8
1N5402
C2
.033 FTP7
C4
4700 50V
5 TP224 TP225
Q6
2SC2812
J5
1 2 3 4 5 FTP5 FTP54 -34V
C19
.033 2 FTP16 +17V 3
POWER SUPPLY
U11
78L08 2 1 FTP18 +8V
R8
1.00K
U3
3 VCC RESET GND 1
R10
FTP20 2 2K
CLASS
R7
432
MAX809x
SD
S2
FTP22
DWG NO.
FTP2
FTP55
C8
470 25V
C9
10
C11
.1
F1
GND1_3
1 STARGND 2 1 3
+
ON 1
OFF 2
FTP9 2 HOT NEUTRAL
R5 Z1
FTP4 FTP56 5.1,1/4W
FTP21
SLO-BLO
NOTE 12
3
Y1 NOTE 11
1 FTP10
197341
B
R6
5.1,1/4W
-
C184
220 25V
2 -17V 1 79L08 3
C10
10
C12
.1
J6
2
1 GND2_3
1 STARGND 2 2 3
FTP11
NOTE 9
3 115V 1 2 3 230V
BLACK 5 4 WHITE BLUE 1
FTP12
U12
-8V
FTP19
2
S1 S1
FTP13 FTP14 6 230V
3 2 1 ORANGE
YELLOW 2
GRAY
3
NOTES:
UNLESS OTHERWISE SPECIFIED:
1. ALL RESISTORS ARE EXPRESSED IN OHMS AND ARE: 0805 - 1/10W, 1%. 2. ALL CAPACITORS ARE EXPRESSED IN MICROFARADS. 3. ALL NON-POLARIZED CAPACITORS ARE CERAMIC CHIPS. 4. ALL POLARIZED CAPACITORS ARE ELECTROLYTICS. 6. IC SUPPLY PINOUTS: TL074 -> PIN 4 = +12V, PIN 11 = -12V 4559 -> PIN 4 = -12V, PIN 8 = +12V LM393 -> PIN 4 = -8V, PIN 8 = +8V 7. FTP DENOTES FUNCTIONAL TEST POINTS. DENOTES IN-CIRCUIT TEST POINTS. 8. TP 9. SWITCH S1 USED ON DUAL VOLTAGE VERSION ONLY. 10. Y2 USED ON 220-240V VERSION ONLY. 11. Y1 USED ON 120V VERSION ONLY. 12. FUSE VALUE IS 1.6A FOR 120V & 115V/230V VERSIONS, 0.8A FOR 220-240V.
13. N.U. INDICATES "NOT USED". 14. SWITCH S2 USED ON 220-240V VERSION ONLY.
115V
4
5
J7
BROWN YELLOW 4
TO J5
SH
2
BLUE
5
Y2
RED
DENOTES CRITICAL COMPONENTS. REPLACE ONLY WITH IDENTICAL BOSE PART.
J5:
J6:
J7:
NOTE 10
XMFR
FTP15
P/N 133220-05
P/N 146563 (120V, 115/230V) P/N 145306 (220-240V) P/N 172323-5
P/N 199800 FOR 115/230V VERSION P/N 197185 FOR 120V VERSION
R5, R6: P/N 121243-1215R15 D3, D4, D7, D8: P/N 170219 Z1: S1:
F1:
R
A
P/N 112027 P/N 145307 (115/230V)
P/N 181561-1600 (120V, 115/230V) P/N 177311-00800(220-240V)
FRAMINGHAM, MA 01701-9168
A
Lifestyle Stereo Amplifier PCB P/N: 197341 Rev. 01 Sheet 2 of 2 Service Manual P/N: 257437 Rev. 00
R
4
3
2
1