A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
R16
20.0K
D22
2
1
3
4
-
+
U15B
NE5532D8
R121 100K
U10A
MAX202E
11
14
T1
RN2H
5K
8
9
D38
BAV99
1
2
3
R124 100K
C72
0.1uF
R9
100K
D31
AZ23-C16
1
2
3
R125 100K
C10
270pF NPO
Q1
MMBT3904
2
1
3
R29
4.75K
4.75K
R31
4.75K
R30
U15A
NE5532D8
J9
1
2
3
C52
0.1uF
4.75K
R35
C50
22uF
10V
+
4.75K
R34
4.75K
R33
4.75K
R32
D1
7.5V SOT-23
3
1
U9 DG409CY
EN
2
S1A
4
S2A
5
S3A
6
S4A
7
DA 8
DB 9
S4B
10
S3B
11
S2B
12
S1B
13
GND
15
A0
1
A1
16
+VCC
14
-VCC
3
U12 7805
Vi
1
Vo
3
GND
2
R36
4.75K
R109 1.00K
D23
BAV99
1
2
3
D40
AZ23-C16
1
2
3
J14
1
2
3
4
U8A
NE5532D8
U16
SN74AHC1G08
A
1
B
2
GND
3
Y
4
VCC
5
C27
0.1uF
C26
0.1uF
D19
BAV99
1
2
3
D8
BAV99
1
2
3
C14
270pF NPO
0 ohm
R81
U2B
NE5532D8
J6
1
2
3
4
5
C35
0.1uF
D9
BAV99
1
2
3
C34
0.1uF
C77 0.1uF
C65
0.001uF
J8
1
2
3
4
C69
0.068uF
U10B
MAX202E
10
7
T2
C68
0.1uF
R72 1.00K
R122 100K
R71 330
T1
1
8
4
5
R77
47K
R116 1.00K
C16
0.1uF
C15
0.1uF
R95
10.0K
D33
AZ23-C16
1
2
3
U7A
NE5532D8
R10 100
R18 2.00K
R67
10.0K
K1
TX2SA-5V
4
3
5
9
8
10
1
12
C70
0.1uF
C21
270pF NPO
D32
AZ23-C16
1
2
3
R112
1.00K
C71
0.1uF
R99
100K
C38
0.1uF
RN1H
5K
8
9
R115
100K
C67
.001uF
R98
3.65K
Q2
MMBT3904
2
1
3
R75
2.00K
C75
0.1uF
C7
0.1uF
R79
47K
C6
0.1uF
Q4
MMBT3904
2
1
3
D18
BAV99
1
2
3
J18
HEADER 3
1
2
3
R106 1.00K
C60
0.1uF
JP1
1
2
C25
270pF NPO
R65
10
C24 .001uF
R74
10.0K
J1
HEADER 6X2
1
2
3
4
5
6
7
8
9
10
11
12
C78 0.1uF
C13
.001uF
R128
200K
C31 .001uF
C62
47pF
R90
100
U7B
NE5532D8
R69
200
Y1
8MHZ
R119 1.00K
R104 4.99K
R123 1.00K
D26
AZ23-C16
1
2
3
R3
470
U5
PIC16F877-20/L
MCLR
2
RA0/AN0
3
RA1/AN1
4
RA2/AN2
5
RA3/AN3
6
RA4
7
RA5/AN4
8
RB0/Int
36
RB1
37
RB2
38
RB3
39
RB4
41
RB5
42
RB6
43
RB7
44
OSC1
14
RE0/AN5
9
RE1/AN6
10
RE2/AN7
11
RD0/PSP1 21
RD1/PSP1
22
RD2/PSP2 23
RD3/PSP3
24
RD4/PSP4
30
RD5/PSP5 31
RD6/PSP6
32
RD7/PSP7 33
RC0
16
RC1
18
RC2 19
RC3
20
RC4/SDI 25
RC5/SDO
26
RC6/Tx
27
RC7/Rx 29
OSC2
15
D34
AZ23-C16
1
2
3
R117
1.00K
C81
0.1uF
R2
2.00K
R25 75
C80 0.1uF
C40
.033uF
R53 10
U4
MAX809
GND
1
VCC
3
RESET
2
R73 10
C45 .033uF
C79
0.1uF
C44 .033uF
R70 10
R66
100
C32
270pF NPO
R4
470
R131 1.00K
C57
0.1uF
U1A
NE5532D8
C61
0.1uF
C59
22uF
10V
+
J22
JST XH 2.5MM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R19 2.00K
C58
0.1uF
C37
270pF NPO
R22 2.00K
U14 7808
Vi
1
Vo
3
GND
2
R21 2.00K
C74
0.001uF
C56
0.1uF
R23 2.00K
C55
0.1uF
R24 2.00K
R27 2.00K
C42
.033uF
R26 2.00K
R64 10
C54
0.1uF
D24
BAV99
1
2
3
R76 300
C11
0.1uF
R82
100
C64
47pF
S10
1
2
R80 2.00K
C18
15pF
S7
1
2
3
4
8
7
6
5
U3
DG409CY
EN
2
S1A
4
S2A
5
S3A
6
S4A
7
DA
8
DB 9
S4B
10 S3B
11 S2B
12 S1B
13
GND
15
A0
1
A1
16
+VCC
14
-VCC
3
C17
15pF
C12
0.1uF
RN1G
5K
7
10
J12
1
2
3
4
C41 .033uF
R63 10
C22 0.1uF
RN1B
5K
2
15
RN1C
5K
3
14
C23
0.1uF
U8B
NE5532D8
RN1F
5K
6
11
C19
47pF
D37
AZ23-C16
1
2
3
C1
47pF
RN1D
5K
4
13
C20
.001uF
RN1A
5K
1
16
J21
1
2
3
4
5
C29
0.1uF
R49 10
C33 .033uF
C28
0.1uF
S9
JP2
1
2
S1
1
2
4
3
R20 4.99K
J15
1
2
D25
AZ23-C16
1
2
3
R94
0 ohm
R89
10.0K
RN3E
5K
5
12
C2 .001uF
JP3
1
2
S4
SW DIP-4
1
2
3
4
8
7
6
5
U10D
MAX202E
8
9
R2
RN3A
5K
1
16
R108
470
R83
10.0K
R84
10.0K
U10C
MAX202E
13
12
R1
R28 75
R14 10.0K
RN3B
5K
2
15
RN3C
5K
3
14
R37 75
C46
0.1uF
C47
0.1uF
R1 4.99K
C48
0.1uF
R126 1.00K
RN3F
5K
6
11
R86 100
C49
0.1uF
R93
10.0K
R92
10.0K
R39 75
F4
5MM T3A 250V
1
2
RN3G
5K
7
10
R120 1.00K
D27
LED GRN
2
1
RN3D
5K
4
13
J7
6
5
4
3
2
1
7
8
U2A
NE5532D8
D28
LED YEL
2
1
D29
LED RED
2
1
RN3H
5K
8
9
D30
LED YEL
2
1
D36
BAV99
1
2
3
C51
1000uF
35V
+
U10E
MAX202E
C1+
1
C1-
3
C2-
5
C2+
4
V-
6
V+
2
GND
15
+5V
16
T4
SC937-02
1
8
4
5
D39
AZ23-C16
1
2
3
C66
47pF
omit
T3
1
8
4
5
RN4F
5K
6
11
T2
1
8
4
5
R130
100
R129 470
C76
0.1uF
J4
JST RC-D14-290
1
2
3
4
5
6
7
8
9
10
11
12
13
14
20.0K
F2 RXE010
1
2
U6
24C01A
GND
4
SDA 5
SCL 6
PP 7
VCC
8
S0
1
S1
2
S2
3
J11
1
2
3
R17 2.00K
C53
4.7uF
35V
+
C8
47pF
F1 RXE010
1
2
RN4C
5K
3
14
200K
R47
R38 4.99K
200K
R48
200K
R45
R44
200K
R78
75
U11
RPM-638CBL
Vcc
3
OUT
1
GND
2
RN4B
5K
2
15
200K
R46
J10
1
2
3
4
5
C4
0.1uF
RN4E
5K
5
12
D3
2
1
C3
270pF NPO
R8 4.99K
R88
300
RN4D
5K
4
13
D21
BAV99
1
2
3
R87
0 ohm
D2
BAV99
1
2
3
RN1E
5K
5
12
R127
1.00K
RN2E
5K
5
12
RN4H
5K
8
9
D41
AZ23-C16
1
2
3
C39
0.1uF
R40 10.0K
C30
47pF
RN2A
5K
1
16
J5
2
1
N H
RN2B
5K
2
15
RN2C
5K
3
14
U1B
NE5532D8
RN4G
5K
7
10
D35
AZ23-C16
1
2
3
R118
1.00K
Q6
1
2
3
J13
1
2
Q5
1
2
6
4
T5 7
1
9
10
6
12
3
4
R91
0 ohm
C5
270pF NPO
Q7
MMBT3904
2
1
3
RN2F
5K
6
11
C73
0.068uF
R11
47K
RN4A
5K
1
16
RN2G
5K
7
10
R105 1.00K
RN2D
5K
4
13
R12
47K
R13
47K
Center2
LS_Spkr_data
IR_IN
Cmnd_LED
TREBLE_PWM
Bass1
Front1
FAULT_LED
Buf_Protect_N
Rx_RS232
L+SPKR
R+SPKR
C-
B-
RS+SPKR
LS+SPKR
RS-LS-
L-
B+SPKR
C+SPKR
+8V_FUSED
SETUP_LED
Bass2
Surround2
Surround1
Center1
Front2
Protect
TV_on
Right_Input
Right_Input
Right_Input
Left_Input
Left_Input
Left_Input
Amp_Power
MR-
DIG_SEL_B
Set_Audio
Set_Audio
Left_Music_Input
Right_Music_Input
Right_Video_Input
AEQ
No_LSn
DIG_SEL_A
Left_Video_Input
DIG_EN
Tx_RS232
Protect
Right_Input
TTY_OUT
SHUTDOWN_N
TREBLE
BASS_PWM
BASS
DC_offset
Left_Input
SPDIF-IN
LS-TX
H
Amp_Power
Buf_Protect_N
SPARE
TREBLE_PWM
TREBLE
BASS
BASS_PWM
LS_Spkr_data
LS_Turn_On
LS_Turn_On
IR_In
+5V_FUSED
TV_on
SPARE_1
ML-
SPARE_1
VL-
ML-
VR-
MR-
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+8V
+8V
+5V
+5V
+5V
+5V
+12V
-12V
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-12V
+12V
+12V
-12V
-12V
+12V
+12V
-12V
+12V
-12V
+12V
-12V
+12V
-12V
+12V
-12V
-12V
+12V
+12V
-12V
+12V
-12V
+12V
-12V
1
1
1
1
1
1
+12V
-12V
1
1
+5V
1
+5V
1
+5V
+5V
+5V
1
+12V
-12V
1
+5V
+5V
+12V
-12V
+12V
+5V
+5V
+12V
-12V
+12V
-12V
+5V
1
1
+5V
+5V
+5V
+5V
+5V
+5V
+5V
Rx_RS232
Rx_RS232
Tx_RS232
Tx_RS232
Music
Audio
Inputs
Left
Right
+
-
GND
+
-
AC TRANSFORMER
+
+
+
-
Front
Speakers
+
Surround
Speakers
Bass
Speaker
-
-
+
+
Center
Speaker
Left
Right
-
-
-
RS232C
Serial
Spkr Data/Tx
GND
Turn-On/Rx
Ant/DTR
Music
Center
Input
GND
IR
Input
GND
IR+
IR Sensor
TV
Sensor
+8V
IR-
+5V
On
-
+
-
Right
+
Left
Video
Audio
Inputs
GND
Power
Cmnd
Fault
Setup
RJ45
S/PDIF
INPUTS
Secondary
Wired
Directly to
Amplifier
PCB
B15B-XH-A
TOP ENTRY
DIGITAL GND
MECCA @ C50
MINUS PIN
U5
U5
U6
U10
U4
SOCKETED
Switch for
Development
Use Only
AC Mains Input Bose
P/N: 146563
Only on Euro
version. Insert
shorting jumper on
other variants
Differential analog inputs
Power supply failure monitor
level translator
SPDIF inputs and selector
Connections from
power amp PCB
Connection to/from DSP PCB
analog source selector
Speaker EQ
selector switch
Micro Controller
Tamura
PL2.5-20-130B
120V: install JP1 & JP3
240V: install JP2
Header to Test
Accessory
REPLACE WITH
FUSE OF EQUAL
RATING
P/N: 181561-3000
Rx
Tx
Relay shown
deenergized
(normal use).
U16
!
!
!
!
!
Close Switches
to Short
Negative Inputs
!!!
R15
!
!
Left
Right
R
FRAMINGHAM, MA 01701-9168
TA-1 Home Theater Amplifier
Input/Output PCB
PCB P/N: 256441 Rev. 01
Sheet 1 of 1
Service Manual P/N: 263494 Rev. 00
