BOSE BUILT-INVISIBLE TA-1 Schematic

A
Differential analog inputs

RN1E

RN1D

R105 1.00K

D25

3

AZ23-C16

12

+

-

+

-

J6

J21

Ant/DTR

GND

GND

GND

R106 1.00K

3

D26

R109 1.00K

R112

1.00K

124

S1

R116 1.00K

R120 1.00K

R126 1.00K

1
2
3

1
2
3
4

1
2
3
4
5

1

+8V_FUSED

2
3

AZ23-C16

12

RN2D

1 2

3

D31

AZ23-C16

RN2H

1 2

3

D32
AZ23-C16

MR-

3

VR-

1 2

3

D33
AZ23-C16

R117

1.00K

1 2

3

D34
AZ23-C16

R118

1.00K

1

3

D35
AZ23-C16

2

1 2

3

D37
AZ23-C16

3

R86 100

3

1 2

R127

1.00K

R129 470

1
2
3
4
5

MR-

ML-

ML­VL-

1
2
3
4
5

Rx

Tx

J9

J8

IR+

IR-

+5V

J10

On

+8V

J11

Music
Audio
Inputs

4 4

Left

GND

Right

Close Switches
to Short
Negative Inputs

3 3

Video
Audio
Inputs

+

Left

-

GND

+

Right

-

2 2

RS232C
Serial

Music
Center
Input

Turn-On/Rx

Spkr Data/Tx

IR
Input

1 1

TV
Sensor

IR Sensor

5K

413

RN1H

5K

89

5K

413

1

5K

89

1

RN3D

5K

413

RN3H

5K

RN4D

5K

413

RN4H

5K

89

8 9

R2

1 2

D39
AZ23-C16

3

D41
AZ23-C16

R104 4.99K

F2 RXE010

C3
270pF NPO

1

7 10

C5
270pF NPO

1

RN2E

5K

C10
270pF NPO

RN2G

5K

7 10

C14
270pF NPO

C21
270pF NPO

1

89

1

C32
270pF NPO

1

7 10

C37
270pF NPO

1

U10D
MAX202E

AZ23-C16

12

U10C
MAX202E

13

R88

R75

C65

0.001uF

R131 1.00K

12

5K

512

RN1G

5K

512

1

RN3E

5K

512

RN3G

5K

7 10

C25
270pF NPO

RN4E

5K

512

RN4G

5K

D40

R1

12

300

2.00K

R77
47K

D3

2 1

R130 100

C81

0.1uF

A

2 15

1

RN2C

RN2B

2 15

2 15

1

1

+8V

RN1B

5K

+12V

U1A
NE5532D8

-12V

5K

314

5K

+12V

U2A
NE5532D8

-12V

RN3C

5K

RN3B

5K

+12V

U7A
NE5532D8

-12V

RN4C

5K

RN4B

5K

2 15

+12V

U8A
NE5532D8

-12V

+5V

12

2

13

314

314

R65
10

K1

3

4

5

10

9

8

1

TX2SA-5V

Q4
MMBT3904

+5V_FUSED

D24
BAV99

1

C75

0.1uF

RN1C

RN1F

RN2F

RN3F

+5V

23

RN4F

5K

5K

5K

5K

5K

Relay shown
deenergized
(normal use).

314

611

1 16

611

611

611

R71 330

R79
47K

RN1A

5K

1 16

C1 47pF

1
+12V -12V

C6

0.1uF

1 1

RN2A

5K

C8 47pF

+12V

1

-12V

+12V -12V

1 1

RN3A

5K

1 16

C19 47pF

+12V

1

-12V

+12V

1

RN4A

5K

1 16

C30 47pF

1
+12V

1 1

MAX202E

C74

0.001uF

D23
BAV99

1

RXE010

F1

R1 4.99K

+12V

U1B
NE5532D8

-12V

R8 4.99K

U2B
NE5532D8

C15

0.1uF

R20 4.99K

U7B
NE5532D8

C26

0.1uF

R38 4.99K

+12V

U8B
NE5532D8

-12V

C38

0.1uF

U10A

R72 1.00K

+5V

23

12

-12V

-12V

C7

0.1uF

1

T1

C16

0.1uF

C27

0.1uF

C39

0.1uF

Left_Music_Input
Left_Video_Input

Right_Music_Input
Right_Video_Input

+5V

1114

Tx_RS232

Rx_RS232

R128
200K

U11

RPM-638CBL

Vcc3OUT1GND

2

Speaker EQ
selector switch

1
2
3
4

SW DIP-4

D21
BAV99

1

+5V

R78
75

+

S4

C53

4.7uF
35V

+5V

R93

10.0K

1

C11

0.1uF

1 1

8
7
6
5

SPARE

R40 10.0K

+5V

23

LS_Spkr_data

+5V

R9

100K

SN74AHC1G08

1
2

B

analog source selector

U3 DG409CY

4

S1A

DA

5

S2A

DB

6

S3A

7

S4A

13

S1B

12

S2B

11

S3B

10

S4B

1

A0

16

A1

2

EN

GND

14

+VCC

3

-VCC

15

-12V+12V

C12

0.1uF
1

4.75KR31

4.75KR30

4.75KR34

4.75KR33

4.75KR32

R29 4.75K

+5V

J1

1
3
5
7
9
11

HEADER 6X2
Header to Test

Accessory

C46

0.1uF

+5V

C49

U16

0.1uF

5

VCC

A

4

Y

B

GND

3

B

C

Left_Input
Right_Input

Set_Audio Set_Audio

+5V

3

VCC

2

GND

1

20.0K

2.00K

TREBLE_PWM

+12V -12V

C70

0.1uF

BASS_PWM

R74

10.0K

2

4

D22

-

3

Switch for
Development
Use Only

R80 2.00K

S10

1 2

BASS_PWM
LS_Spkr_data
LS_Turn_On
IR_IN
TV_on
Front1
Front2
Center1
Center2
Surround1
Surround2
Bass1
Bass2
Amp_Power

+5V

R16

R15

20.0K

RJ45

S/PDIF

INPUTS

R121 100K

C71

0.1uF

R124 100K

R69

200

2

1

+

+5V

C17

15pF

J7

C68

0.1uF

+5V

1
2

3

Q7
MMBT3904

1

C60

0.1uF

1
2
3
4
5
6
7
8

R122 100K

0.068uF

C72

0.1uF

R125 100K

0.068uF

R66

100

C51

+

1000uF
35V

Micro Controller
PIC16F877-20/L

U5

2

MCLR

3

RA0/AN0

4

RA1/AN1

5

RA2/AN2

6

RA3/AN3

7

RA4

8

RA5/AN4

36

RB0/Int

37

RB1

38

RB2

39

RB3

41

RB4

42

RB5

43

RB6

44

RB7

11

RE2/AN7

10

RE1/AN6

9

RE0/AN5

14

OSC1

C69

C73

6 4

!

Q5

R76 300

U12

Vi1Vo

U14 7808

1

Vi

+5V

SOCKETED

7805

GND

2

GND

Vo

2

4.75KR35

R36 4.75K

2
4
6

8
10
12

8
9

SPARE_1

R18 2.00K

R19 2.00K

R21 2.00K

R22 2.00K

R23 2.00K

R24 2.00K

R26 2.00K

R27 2.00K

1

C1+

3

C1-

6

V-

Left_Input
Right_Input

LS_Turn_On

+5V

16

+5V

GND

15

U10B
MAX202E

7

V+

C2+

C2-

U10E
MAX202E

2
4

5

T2

C48

0.1uF

10

TV_on

C47

0.1uF

IR_In

!

AC Mains Input Bose

P/N: 146563

NH

2 1

J5

+5V

D2
BAV99

23

1

Amp_Power

!

!!!

H

S9

Only on Euro

version. Insert

shorting jumper on
other variants

120V: install JP1 & JP3
240V: install JP2

1 2

JP1

1 2

JP2

1 2

JP3

Buf_Protect_N

+5V

U6

24C01A

VCC

1

S0

2

S1

3

GND

S2

REPLACE WITH
FUSE OF EQUAL
RATING

5MM T3A 250V

1

P/N: 181561-3000

Tamura
PL2.5-20-130B

8

SDA
SCL

PP

4

F4

!

T5

3
4

6 12

U4

MAX809

RESET

R17

5
6

7

!

2

71
9

10

C

21

RD0/PSP1

22

RD1/PSP1

23

RD2/PSP2

24

RD3/PSP3

30

RD4/PSP4

31

RD5/PSP5

32

RD6/PSP6

33

RD7/PSP7

16

RC0

18

RC1

19

RC2

20

RC3

25

RC4/SDI

26

RC5/SDO

27

RC6/Tx

29

RC7/Rx

15

OSC2

Y1

8MHZ

SPDIF inputs and selector

C22 0.1uF

C23

0.1uF

C28

0.1uF

C29

0.1uF

+12V

U15A
NE5532D8

-12V

+12V

U15B
NE5532D8

-12V

2 3

!

Q6

1

HEADER 3

3

C50

+

22uF
10V

DIGITAL GND
MECCA @ C50
MINUS PIN

3

C59

+

22uF
10V

R83 10.0K
R84 10.0K
R89 10.0K
R82 100

C18
15pF

1 8

T1

4 5
1 8

T2

4 5
1 8

T3

4 5
1 8

T4

4 5

SC937-02

R119 1.00K

1.00K

R123

J18
1

2
3

C52

0.1uF

+8V

C61

0.1uF

R92

10.0K

TREBLE_PWM

Cmnd_LED
FAULT_LED
SETUP_LED

DIG_SEL_A
DIG_SEL_B
DIG_EN
Tx_RS232
Rx_RS232

R90
100

D36

+5V

BAV99

23

1

TREBLE

D38

+5V

BAV99

23

1

BASS

!

AC TRANSFORMER

+5V

D1

31

7.5V SOT-23

R25 75

R28 75

R37 75

R39 75

Protect

R87
0 ohm

D

+5V+12V

R4
470

D29

D30

2 1

2 1

LED YEL

Setup

R108
470

+5V

R11

R12

R13

+5V

47K

47K

47K

AEQ
No_LSn

23

DG409CY

U9

4

S1A

5

S2A

6

S3A

7

S4A

13

S1B

12

S2B

11

S3B

10

S4B

1

A0

16

A1

2

EN

GND

14

+VCC

3

C34

0.1uF

+5V

R99
100K

Buf_Protect_N

C35

0.1uF

-12V

U16
C76

0.1uF

-VCC

JST XH 2.5MM
B15B-XH-A
TOP ENTRY

15

Connections from
power amp PCB

J22

C54

0.1uF

+12V

2

13

8
7
6
5

Tx_RS232
Rx_RS232

C64

+5V

47pF

R95

R67

10.0K

10.0K

100K

0 ohmR81

8

DA

9

DB

L-

1

L+SPKR

2

C+SPKR

3

R+SPKR

4

C-

5

RS+SPKR

6

RS-LS-

7

LS+SPKR

8

B-

9

B+SPKR

10

Protect

11
12
13
14
15

C56

C55

0.1uF

0.1uF

C62
47pF

R10 100

.001uF

Secondary
Wired
Directly to
Amplifier
PCB

C67

R91
0 ohm

R2

2.00K

D27

D28

2 1

LED YEL

LED GRN

Cmnd Fault

Power

R14 10.0K

D8 BAV99

D9 BAV99

23

1

1

2 3

2 3

D19

D18

BAV99

BAV99

C4

0.1uF

Q2
MMBT3904

2

R98

3.65K

Power supply failure monitor
level translator

R94
0 ohm

1

+5V +5V

R3
470

2 1

LED RED

1

1

Q1
MMBT3904

13

Service Manual P/N: 263494 Rev. 00

D

S7

SPARE_1

R115

+12V

+5V

Left_Input
Right_Input

1
2
3
4

-12V

C57

0.1uF

R44 200K

C66

47pF
omit

200KR45

200KR46

U5U5U6U10U4
C58

0.1uF

E

Connection to/from DSP PCB

JST RC-D14-290

1

R49 10

C31 .001uF

R53 10

R64 10

J4

1
3
5
7
9
11
13

C41.033uF

C44 .033uF

C45.033uF

2
4
6

8
10
12
14

C77 0.1uF

C79 0.1uF

R70 10

R73 10

BASS
SHUTDOWN_N
LS-TX
TTY_OUT
SPDIF-IN
Left_Input
Right_Input

C78 0.1uF

R63 10

C80 0.1uF

C13
.001uF

C20
.001uF

C2 .001uF

4

+

Left

3

-

2
1

J12

2
1

J13

4
3
2
1

J14

2
1

J15

Front

+

Speakers

Right

-

+

Center

-

Speaker

+

Left

-

Surround

+

Speakers

Right

-

+

Bass

-

Speaker

R

TREBLE
DC_offset

C24 .001uF

200KR47

200KR48

C33.033uF

C40

.033uF

C42 .033uF

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Input/Output PCB

PCB P/N: 256441 Rev. 01

Sheet 1 of 1

E

A

Differential analog inputs

RN1D

5K

RN1H

5K

AZ23-C16

5K

RN2H

5K

VR-

RN3D

5K

D33
AZ23-C16

RN3H

5K

D34
AZ23-C16

RN4D

5K

D35
AZ23-C16

RN4H

5K

D37
AZ23-C16

8 9

1 2

D39
AZ23-C16

D41
AZ23-C16

R104 4.99K

F2 RXE010

413

89

413

1

89

1

413

413

89

U10D
MAX202E

R2

3

R88
R75

1

1

C10

270pF NPO

1

89

1

1

R131

RN1E

5K

C3

270pF NPO

RN1G

5K

7 10

C5
270pF NPO

RN2E

5K

RN2G

5K

7 10

C14
270pF NPO

RN3E

5K

C21
270pF NPO

RN3G

5K

7 10

C25
270pF NPO

1

RN4E

5K

C32

270pF NPO

RN4G

5K

7 10

C37
270pF NPO

D40

AZ23-C16

12

U10C
MAX202E

R1

13 12

300

2.00K

C65

0.001uF
R77

47K

R130 100

12

A

512

512

1

512

512

2 1

1.00K

2 15

1

RN2C

RN2B

2 15

2 15

1

1

2

D3

C81

0.1uF

+8V

R105

1.00K

3

D25
AZ23-C16

12

GND

GND

GND

IR+
IR-

+5V

+8V

R106

1.00K

3

R109

MR-

1.00K

R112

1.00K

124

1
2
3

1
2
3
4

1
2
3
4
5

1

+8V_FUSED

2
3

D26

12

RN2D

1 2

3

D31

AZ23-C16

1 2

3

D32
AZ23-C16

MR-

3

S1

R116

1 2

1.00K

3

R117

1.00K

1 2

3

R118

1 2

1.00K

3

R120

1 2

1.00K

3

R126

1.00K

3

R86 100

3

1 2

R127

1 2

1.00K

R129 470

1
2
3
4
5

ML-

ML-

VL-

1
2
3
4
5

Rx

Tx

J9

J8

J10

On

J11

Music
Audio
Inputs

4 4

3 3

2 2

1 1

Left

GND

Right

Close Switches
to Short
Negative Inputs

Video
Audio
Inputs

Left

GND

Right

RS232C
Serial

Music
Center
Input

Turn-On/Rx

Spkr Data/Tx

IR
Input

IR Sensor

TV
Sensor

+

-

+

-

+

-

+

-

Ant/DTR

J6

J21

RN1B

5K

+12V

U1A
NE5532D8

-12V

5K

314

5K

+12V

U2A
NE5532D8

-12V

RN3C

5K

RN3B

5K

+12V

U7A
NE5532D8

-12V

RN4C

5K

RN4B

5K

2 15

+12V

U8A
NE5532D8

-12V

+5V

R65
10

12

13

314

314

K1

3

4

5

10

9

8

1

TX2SA-5V

Q4
MMBT3904

+5V_FUSED

D24
BAV99

1

C75

0.1uF

RN1C

RN1F

RN2F

5K

RN3F

RN4F

5K

+5V

23

5K

5K

5K

Relay shown
deenergized
(normal use).

RN1A

5K

314

1 16

611

1

+12V -12V

1 1

RN2A

5K

1 16

C8 47pF

611

1

+12V -12V

RN3A

5K

1 16

611

1

+12V

RN4A

5K

1 16

611

1

+12V

R71

330

D23
BAV99

F1 RXE010

R79
47K

C1 47pF

+12V

U1B
NE5532D8

-12V

C6

0.1uF

R8 4.99K

+12V

U2B
NE5532D8

-12V

C15

0.1uF

1 1

R20 4.99K

C19 47pF

+12V

U7B
NE5532D8

-12V

C26

0.1uF

1

C30 47pF

+12V

-12V

C38

0.1uF

1 1

U10A

MAX202E

R72

1.00K

C74

0.001uF

+5V

23

1

12

R1 4.99K

C7

0.1uF

C16

0.1uF

-12V

C27

0.1uF

1

R38 4.99K

U8B
NE5532D8

-12V

C39

0.1uF

T1

Left_Music_Input
Left_Video_Input

Right_Music_Input
Right_Video_Input

+5V

1114

R128
200K

U11

RPM-638CBL

Vcc3OUT1GND

Speaker EQ
selector switch

Tx_RS232

Rx_RS232

D21
BAV99

+5V

2

1
2
3
4

SW DIP-4

1

R78
75

+

S4

C53

4.7uF
35V

+5V

R93

10.0K

1

C11

0.1uF
1 1

8
7
6
5

R40 10.0K

+5V

23

LS_Spkr_data

+5V

R9

100K

SN74AHC1G08

analog source selector

U3 DG409CY

4

S1A

5

S2A

6

S3A

7

S4A

13

S1B

12

S2B

11

S3B

10

S4B

1

A0

16

A1

2

EN

GND

14

+VCC

3

-VCC

15

-12V+12V

C12

0.1uF
1

4.75KR31

4.75KR30

4.75KR32

R29 4.75K

+5V

1
3
5
7
9

SPARE

11

HEADER 6X2
Header to Test

Accessory

+5V

U16

5

1

A

4

Y

2

B

3

B

4.75KR33

C46

0.1uF

0.1uF

B

4.75KR34

J1

DA
DB

C49

4.75KR35

R36 4.75K

2
4
6

8
10
12

8
9

SPARE_1

R18 2.00K

R19 2.00K

R21 2.00K

R22 2.00K

R23 2.00K

R24 2.00K

R26 2.00K

R27 2.00K

U10E
1

C1+

3

C1-

6

MAX202E

Set_Audio

Left_Input
Right_Input

LS_Turn_On

+5V

16

V-

U10B

V+

C2+

C2-

15

2
4

5

MAX202E

T2

TV_on

C48

0.1uF

C

Set_Audio

+5V

Switch for
Development

3

Use Only

VCC

U4

MAX809

Buf_Protect_N

+5V

8

U6

24C01A

R17 2.00K

VCC

5

1

SDA

S0

6

2

SCL

S1

3

GND

S2

7

PP

4

TREBLE_PWM

D2

+5V

BAV99

23

1

!

AC Mains Input Bose

P/N: 146563

NH

2 1

J5

C47

0.1uF

IR_In

107

Amp_Power

!

AC Power Switch

H

S9

Only on Euro

version. Insert

shorting jumper on
other variants

120V: install JP1 & JP3
240V: install JP2

1 2

JP1

1 2

JP2

1 2

JP3

REPLACE WITH
FUSE OF EQUAL
RATING

5MM T3A 250V

F4

1 2

!

T5

3
4

6 12
Tamura

PL2.5-20-130B

!

71

4

9
10

R80 2.00K

2

GND

RESET

BASS_PWM
LS_Spkr_data
LS_Turn_On
IR_IN
TV_on
Front1
Front2
Center1
Center2
Surround1
Surround2
Bass1
Bass2
Amp_Power

R15

20.0K

+12V -12V

C70

0.1uF

R74

10.0K

2

D22

3

S10

1 2

+5V

R16

20.0K

J7

R121 100K

C71

0.1uF

R124 100K

R69

200

2

1

+5V

0.1uF

+5V

13

C68

1

BASS_PWM

-+

RJ45
S/PDIF
INPUTS

Q7
MMBT3904

1
2

C60

0.1uF

1
2
3
4
5
6
7
8

R122 100K

0.068uF

C72

0.1uF

R125 100K

C73

0.068uF

R66
100

C51

+

1000uF
35V

Micro Controller

PIC16F877-20/L

U5

2

MCLR

3

RA0/AN0

4

RA1/AN1

5

RA2/AN2

6

RA3/AN3

7

RA4

8

RA5/AN4

36

RB0/Int

37

RB1

38

RB2

39

RB3

41

RB4

42

RB5

43

RB6

44

RB7

11

RE2/AN7

10

RE1/AN6

9

RE0/AN5

14

OSC1

C17
15pF

C69

1 2

6 4

!

Q5

R76 300

U12

Vi1Vo

U14 7808

Vi1Vo

+5V

SOCKETED

Y1

8MHZ

+12V

-12V

+12V

-12V

1

7805

3

GND

2

DIGITAL GND
MECCA @ C50
MINUS PIN

3

GND

2

RD0/PSP1
RD1/PSP1
RD2/PSP2
RD3/PSP3
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7

RC4/SDI

RC5/SDO

RC6/Tx
RC7/Rx

OSC2

C22

U15A
NE5532D8

U15B
NE5532D8

2 3

21
22
23
24
30
31
32
33
16

RC0

18

RC1

19

RC2

20

R83 10.0K

RC3

25

R84 10.0K

26

R89 10.0K

27

R82 100

29

15

C18
15pF

SPDIF inputs and selector

1 8

0.1uF
T1

4 5
1 8

C23

0.1uF
T2

4 5
1 8

T3

C28

0.1uF
4 5

1 8

C29

T4

0.1uF
4 5

SC937-02

D36
BAV99

1.00K

R119

D38
BAV99

R123 1.00K

!

AC TRANSFORMER

Q6

J18

3
2
1

EUR0-3

C50

+

C52

22uF

0.1uF

10V

7.5V SOT-23

+8V

C59

+

C61

22uF

0.1uF

10V

+5V

R92

10.0K

1

1

31

TREBLE

BASS

!

D1

TREBLE_PWM

Cmnd_LED
FAULT_LED
SETUP_LED

DIG_SEL_A
DIG_SEL_B
DIG_EN
Tx_RS232
Rx_RS232

R90
100

R2575

R2875

R3775

R3975

+5V

23

+5V

23

R87
0 ohm

D27

LED GRN
Power

R14 10.0K

C62
47pF

D8 BAV99

2 3

D18
BAV99

C4

0.1uF

R10 100

C67

.001uF

Power supply failure monitor
level translator

Secondary
Wired
Directly to
Amplifier
PCB

R94

R91

0 ohm

0 ohm

1

Service Manual P/N: 263494 Rev. 00

C

+12V

1

1

MMBT3904

Protect

R2

2.00K

D28

2

1

LED YEL
Cmnd

D9 BAV99

23

2 3

2

R98

3.65K

D

+5V +5V

R3
470

2

1

LED RED
Fault Setup

1

1

D19
BAV99

Q1
MMBT3904

Q2

13

D

D29

23

0.1uF

E

Left_InputLeft_Input
Right_InputRight_Input

+5V

R4
470

D30

2

2

1

1

LED YEL

R108
470

+5V

R11

R12

R13

47K

47K

AEQ
No_LSn

U9

DG409CY

GND

15

Connections from
power amp PCB

J22

JST XH 2.5MM

B15B-XH-A

TOP ENTRY

U4
C54

0.1uF

C64
47pF

DA
DB

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

R67

10.0K

8
9

+5V

U10

C55

0.1uF

Tx_RS232
Rx_RS232

R95

10.0K

R81

L­L+SPKR
C+SPKR
R+SPKR
C­RS+SPKR

RS-LS-

LS+SPKR
B­B+SPKR
Protect

8
7
6
5

+5V

C56

0.1uF

R115

100K

+12V

S7

0 Ohm

1
2
3
4

SPARE_1

-12V

+5V

U5U6
C57

0.1uF

R44 200K

C66

47pF

NU

200KR45

U5

C58

0.1uF

Connection to/from DSP PCB

JST RC-D14-290

1

.033uF

R49

C31 .001uF

R53

.033uF

.033uF

10

R64

1
3
5
7
9
11
13

10

10

J4

2
4
6

8
10
12
14

C41

.033uF

C79 0.1uF

C44

C45

C77 0.1uF

R63

R70 10

.033uF

R73 10

.033uF

BASS
SHUTDOWN_N
LS-TX
TTY_OUT
SPDIF-IN
Left_Input
Right_Input

C78 0.1uF

10

.001uF

C2

C80 0.1uF

C13

.001uF

C20

.001uF

4

+

Left

3

-

2
1

2
1

4
3
2
1

2
1

Front

+

Speakers

Right

-

J12

+

Center

-

Speaker

J13

+

Left

-

Surround
Speakers

+

Right

-

J14

+

Bass

-

Speaker

J15

R

TREBLE

DC_offset

C24 .001uF

200KR47

200KR48

200KR46

C33

C40

C42

FRAMINGHAM, MA 01701-9168

47K

4

S1A

5

S2A

6

S3A

7

S4A

13

S1B

12

S2B

11

S3B

10

S4B

1

A0

16

A1

2

EN

14

+VCC

3

+5V

R99
100K

Buf_Protect_N

-12V

C35

0.1uF

U16
C76

0.1uF

-VCC

+12V

C34

2

13

TA-1 Home Theater Amplifier

Input/Output PCB

PCB P/N: 256441 Rev. 02

Sheet 1 of 1

E

8

7

6543 1

2

DD

C

B

C

B

R

A

FRAMINGHAM, MA 01701-9168

A

TA-1 Home Theater Amplifier

Amplifier PCB

Service Manual P/N: 263494 Rev. 00

2345678

PCB P/N: 256421 Rev. 01

Sheet 1 of 2

1