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

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 2 of 2

1

C

B

A

B_EQAUD

MUTE_LR

8

7

C764

0.1

2

1

TP845

C727

R790

16.5K

1.0/50

C725

100/16

TP863

TP717

D

Q724

S

2

D721

TP869

1

R825

2.0K

TP864

CMP_BIAS CMP_BIAS

CMP_OUT CMP_OUT

STBY

7294_MUTE_C

C713

1.0/50

TP862

TP808

Q712

TP809

R772

100K

D718

BAV99L

TP718

C765

1.0

1.0

C771

R823

U707

7

1/2

(8=+12V,4=-12V)

R821

100K

TP861

7

+

6

-

TP853

C718

10/16

R755

2.49K

TP810

R791

1.0M

-12V

1.0M

6

-

5

+

R759

2.49K

C748

.001

C747

.001

2 2

TP816

R757

16.5K

3904

1

Q725

2SA1179

1

TP866

TP867

R756

49.9K

TP818

+40V

D720

C762

1.0

2

2

D723

1

TP871

R827

2.0K

4559

U702

1

1/4

LM339

(3=+12V,12=-12V)

2

TP854

D705 D702

BAV99L BAV99L

C746

0.1

2

1

R812

100K

1

R794

301

1

TP800

TP719

R824

100K

R744

100K

R768

100K

TP821

TP815

R758

49.9K

TP819

TP825

R778

100K

R775

2.49K

R786

200

TP706

Q716

140349

R797

2.49K

TP811

R796

100K

TP822

R746

10K

R745

1.0K

Q702

3904

TP817

R735

1.0K

1

2

1

R763

1.0K

Q711

3906

R769

1.0K

R770

10K

TP826

Q717

3906

R789

200K

C759

270p

R783

10.0M

R785

10K

2

TP716

C761

0.1

2

R793

4.22k

Q722

3904

-12V

D722

TP870

+40V

R747

1.0K

Q701

3906
TP823

R703

1.5K

1

R734

3.65K

2

NC3 +VS +PWVS

IN-

3

IN+

4

IN+MUTE

9

STBY

10

MUTE

11

NC2

1

TP820

R762

3.65K

1

R706

1.5K

TP824

Q710

3904

R771

1.0K

-40V -40V

TP801

TP802

TP714

R784

33.2K

+12V

2

-

1/2

3

+

(8=+12V,4=-12V)

-12V

TP814

C742

.01

TP701

U707

R826

2.0K

TP805

C760

0.1
1

1

4559

C763

0.1
1

+40V

TIP146T

Q700

D706

1N5402

D701

C749

5.6V

.001

+40V +40V

12 7 13

TDA7294

TP704

C752

.01

OUT

U703

BTSTRAP

NC1 NC2

-VS -PWVSSTBYGND
1581

-40V

C750

D708

.001

5.6V

D707

1N5402

Q706

TIP141T

6543 1

+40V +40V

R773

1.0K

TP804

R774

1.0K

TP803

Q714

3904

R707

75

Q713

3904

R787

49.9K

TP806

R788

1

R711

Q723

220

3906

1

TP807

R712

75

Q721

3906

TP812

TP813

R792

1.0K

-40V -40V

+20V

1

14

R816 R806

R903

330K 3.65K

332

6
5

TP842

1

-20V

2

2

TP830

TP828

TP838

TP827

R742

100K

R749

49.9K

TP832

TP833

14

OUT

6
5

NC1

+40V +40V

R730

1.0K

TP836

R740

10K

Q704

3906

R741

TP837

1.0K

R702

1.5K

Q703

3904

1

TP829

R731

3.65K

R732

1.0K

1

2

NC3 +VS +PWVS

IN-

3

IN+

4

IN+MUTE

9

2

1

STBY

10

MUTE

11

R761

TP843

Q707

3906

R766R795

1.0K1.0K

R765

10K

1.0K

TP831

1

R760R767

3.65K100K

1

R705

1.5K
TP834

Q708

3904

TP835

R764

1.0K

-40V -40V

R+SPKR

C705C712 C721

10/2510/25 10/25

C741

.01

TP703

D703

5.6V

+40V

12 7 13

U704

TDA7294

-VS -PWVSSTBYGND

-40V

D709

5.6V

TP705

C751

.01

CMP_BIAS

CMP_OUT

7294_MUTE_LR7294_MUTE_LR

TIP146T

Q705

1N5402

BTSTRAP

1581

1N5402

Q709

TIP141T

STBYSTBY

D704

C740

.001

C739

.001

D710

TP857

R725

100K

U702

13

LM339

TP856

C702

(3=+12V,12=-12V)

2

TP709TP711

R722

2.49K

7

LM393

(4=-12V,8=+12V)

R781

49.9K

2

IN-

3

IN+

4

IN+MUTE

9

STBY

22

10

MUTE

11

NC2

+20V

LS+SPKR

R779R728R743

1

U706

LM393

(4=-12V,8=+12V)

C722

10/16

2

TP713TP712

R776

2.49K

R802

3.65K

1

RS_EQAUD

C716

10/25

100K100K100K

3

+

1/2

2

-

TP846

7294_MUTE_LSRS

TP860

C723C719

0.47/500.47/50

R780

16.5K

R782

2.49K

C756C738

.001.001

C754

.001

1.0/50

STBY

R777

49.9K

22

1

14

OUT

NC1

R820

R904

330K

332

6
5

TP844

1

-20V

TP851

C720

1.0/50

BAV99L

D719

11

+

1/4

10

-

TP849

C710

10/16

C734

.001

+

1/2

-

U706

12 7 13

NC3 +VS +PWVS

TDA7294

1

R723

16.5K

R719

2.49K

2

U705

-40V

C709

0.47/50

R721R752

C735

.001

5

6

-VS -PWVSSTBYGND

49.9K49.9K

2

+12V

BTSTRAP

1581

2

R727

100K

TP859

R726

1.0K

1 1

14

OUT

6
5

NC1

R720

49.9K

R905R900

2
3
4

9
10
11

C708

10/16

332332

IN­IN+
IN+MUTE
STBY
MUTE
NC2

CMP_BIAS

R818R817 R805

330K330K 3.65K

TP841

12 7 13

NC3 +VS +PWVS

TDA7294

1

2

FRAMINGHAM, MA 01701-9168

SGSD200

Q715

C753

D711

.0033

C755

.001

C758

.01

TP715

C757

.001

C766

.0033

C+SPKR L+SPKR

1 1

+20V

1N5402

SGSD200

Q718

B+SPKR_OUT

Q726

146818

TP865

R822

0.062

B+SPKR

U702

2

1/4

LM339

(3=+12V,12=-12V)

Q719

SGSD100

D712

1N5402

Q720

SGSD100

R710

5.1

TP868

C726

0.1

1

-20V

C706

10/16

2

TP710

TP847

C704

R_EQAUDC_EQAUD L_EQAUD

1.0/50

R729

2.49K

CMP_BIAS CMP_BIAS

CMP_OUT CMP_OUT

(3=+12V,12=-12V)

TP858

7294_MUTE_LSRS

C707

0.47/50

R737

16.5K

R739

2.49K

C737

.001

2 2

R736

49.9K

STBY

1.0/50

C717

R738

49.9K

2

IN-

3

IN+

4

IN+MUTE

9

STBY

10

MUTE

11

LS_EQAUD

TP852

5

+

4

-

TP848

TP850

R733

100K

U702

14

LM339

C715

10/16

2

R753

2.49K

D716 D715

BAV99L BAV99L

C714

9

+

0.47/50

1/4

8

-

TP855

R750

16.5K

R748

2.49K

C743

.001

C745

.001

2

C744

0.1

2

1

+40V

12 7 13

NC3 +VS +PWVS

U700

TDA7294

BTSTRAP

-VS -PWVSSTBYGND
1581

1

-40V

C736

0.1

2

1

TA-1 Home Theater Amplifier

Amplifier PCB

Service Manual P/N: 263494 Rev. 00

PCB P/N: 256421 Rev. 02

Sheet 1 of 2

2345678

+40V

U701

-40V

C733

DD

RS+SPKR

R819

R804

330K

14

OUT

R901

332

6

BTSTRAP

5

NC1NC2

-VS -PWVSSTBYGND
1581

0.1

1

TP840

C711

10/25

3.65K

1

C

B

R807

3.65K

1

R

A

1

8

7

6543 1

2

C

B

A

18J700

17J700

16J700

15J700

14J700

13J700

12J700

11J700

10J700

9J700

8J700

7J700

6J700

5J700

4J700

3J700

2J700

1J700

1J701

2J701

3J701

4J701

5J701

6J701

7J701

8J701

9J701

10J701

11J701

12J701

13J701

14J701

15J701

FTP700

FTP705

FTP701

FTP708

FTP702

FTP709

FTP711

FTP703

FTP712

FTP704

FTP713

FTP710

FTP714

+20V_FUSED

FTP745

FTP715

FTP746

FTP732

FTP730

FTP729

FTP726

FTP725

FTP721

FTP720

FTP717

FTP747

FTP748

FTP706

B+SPKR

+12V

GND12

-12V

1

R724

1.00K

2

R704

FUSIBLE

1

1

PROTECT

TP702

2W5.1

+20V

D717

NU

+20V

-20V

TP720

R754

R811

24.9K 49.9K
NU

R751

24.9K 49.9K

-40V

RS_EQAUD

CMP_OUT

B_EQAUD

LS_EQAUD

L_EQAUD

C_EQAUD

R_EQAUD

-12V

+12V

L+SPKR

C+SPKR

R+SPKR

RS+SPKR

LS+SPKR

B+SPKRB+SPKR

+40V

+20V

R810

R809

R708

22.1K

R709

10.0K

C724

47

NON_POLARIZED

1

R814 R815R813

30K 30K30K

B+SPKR

R716

274K

11 1

FTP738

1J702

C779

0.1

FTP736

3J702

FTP734

5J702

FTP737

4J702

FTP735

2J702

112027

B701

100V,6A

KBJ601

C778

0.1

B700
100V,6A

KBJ601

112027

C776

0.1

C772

0.1

C774

0.1

C777

0.1

C770

0.1

R701

274K

R718

274K

+40V

C730

4700/50

C791

4700/50

-40V

R808

10.0K

R803

1.0K
1/2W

+12V

-12V

FTP731

FTP722

+20V

-20V

C731

2200

1

1

1

C773

0.1

C775

0.1

C701

.01

C703

.01

C700

.01

C768

0.1

C767

0.1

C732

2200

C781C780

22002200

TP700

20,1/4W

20,1/4W

7294_MUTE_LR

7294_MUTE_LSRS

7294_MUTE_C

U709

23

LM317T

1

R800

432

R799

432

1

LM337T

32

U708

R714

+40V_FUSED

R713

-40V_FUSED

MUTE_LR

ADJ

R801

3.65K

R798

3.65K

ADJ

GND1

STARGND

12

+20V

+12V

DD

Q727

3906

TP708

R717

100K

R828

274K 5.6V

D724

R700

22.1K

TP707

R715

100K

1

STBY

C792

.01

111

C

INOUT

+40V_FUSED

C790

2.2uF

1

-40V_FUSED

INOUT

B

2

R

A

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Amplifier PCB

Service Manual P/N: 263494 Rev. 00

2345678

PCB P/N: 256421 Rev. 02

Sheet 2 of 2

1

8

R201-4

2

J9

BASS

(SHT 1)

R204-4

1

J9

TREBLE

(SHT 1)

13

J9

INPUT_GND_REF

12

J9

LEFT_INPUT

C

(NOT USED)

M101

M151

SPDIF-IN

M104

(SHT 2)

SER-DATA-IN

6

J9

8

J9

TTY-OUT LS-EQAUD

M150

(SHT 2)

SPDIF-IN

GND

GND

GND

GND

SCLK-F

14

J9

5

J9

4

J9

10

J9

11

J9

9

J9

7

J9

3

J9

RIGHT_INPUT

DC_OFFSET DC_OFFSET

B

SHUTDOWN SHUTDOWN

R202

10K

C200

.01

R205

C201

.01

TURN-ON

M105

C108

.01

J5

4321

8765

12 11 10 9

13

15 14

M106

M152

V_IDENT

3.0K

R108

+12V

GND

P60

M102

NOT USED

P61

+12V

-12V

+12V

-12V

M100

J5

+12V+12V

BAV99L

10K

M103

SHT 2

C141

-12V

NV

SHT 2

R164

200

7

DIFFERENTIAL AMP

BAV99L

D100

BAV99L

D102

D104

TP117

R100

21

1.0K

65

1.0K

DIFFERENTIAL AMP

R101

21

1.0K

R101

87

1.0K

+5V

LRCK-F

+5V

+5V

1

2

3

4

5

6

C100

C105

C109

C113

CLK1

RESET1

K1

VCC

CLK2

RESET2

J2

LEFT INPUT

Z102

.001

Z103

.001

RIGHT INPUT

Z106

.001

Z107

.001

C146

0.01

U106

GND

Z100

R100

43

1.0K

(8=+12v,4=-12v)

2

-

C103

3

100P

+

R100R100

87

1.0K

Z108

R101

43

1.0K

R101

65

1.0K

Z109

+5V

14

J1

13

Q1

12

Q1

11

10

K2

9

Q2

87

Q2

C111

100P

Z104

R107

1.00K

(8=+12v,4=-12v)

U105

6

-

1/2

5

+

R116

1.00K

4559

A

6543 1

LRCKAUX

SCLKAUX

TP165

TP179

1

OE1

2

IN

3

OUT

4

IN

5

OUT

6

IN

7

OUT

8

IN

9

OUT

GND

SDIN2

SDIN3

DATAUX

+5V

BYPASSBYPASS

+5V

TP181

U102

20

VCC

19

OE2

18

OUT

17

IN

16

OUT

15

IN

14

OUT

13

IN

12

OUT

1110

IN

R166

DEM

R167

R168

R169

R170

R171

NV

WP1

WP2

NV

WP3

TP171

R7

6.19K

+

10

1/4

-

9

100K

100K

100K

100K

100K

100K

U104

TL074

TO DSP1
DSP1-IRQ2

8

TP115

+5VD

+5VD

TP120

R161

SDIN1

75

DSP1-FLAG3

DSP1-FLAG2

DSP2-FLAG3

DSP2-FLAG2

SHT 3

AOUT5-F

AOUT6-F

AOUT3-F

AOUT4-F

AOUT1-F

AOUT2-F

TP145

TP146

TP143

TP144

TP141

TP142

1/2

R111

1.00K

U105

4559

7

SHT 3

R102

1.00K

Z110

1

SHT 3

RFS

+12V

Z105

+12V

BYPASS 4559

PINS 8 AND 4

R112

DSP1-RFS1

DSP1-RCLK1

DSP1-DR1

DSP2-IRQ1

C104

R103

100

10uF/25V

SHIELD

C102

330pF

-12V

C107C106

.01.01

C112

100

10uF/25V

SHIELD

C110

330pF

SPDIF-IN2

(SHT 2)

+17V-FUSED

(SHT 4 J8-4)

D2

BAV99L

NOTE: LARGE PADS FOR HEAT SINKING,D2 D3.

TP129

R192

75

+5VA

R104

300

D103

BAV99L

+5VA

+5VA

TP100

R113

300

D105

BAV99L

TP172

C151

.01

R1

75

TP119

R11

R10

16/1W

16/1W

10uF/25V

TP167 TP166

D3

BAV99L

P05

P04

P01

P00

NEAR J5

C2

SCLK-F

TP140

SDIN1

SDIN2

SDIN3

SDOUT1-F

R165

100K

AIN1R

R2

100

R4

30,5%

+3.3V

C117 C118

.01 .01

+3.3V

U101

20

1

VCC

AIN1L

RX1

PG 2

PG 2

LRCK-F

TP107

TP109

TP112

TP139

TP170

2

3

4

5

6

7

8

9

TP168

TP118

OE1

IN

OUT

IN

OUT

IN

OUT

IN

OUT

GND

OVL-ERR

D1

BAV99L

TO uC

+5VD

TP104

TP110

TP111

LRCKAUX

SCLKAUX

DATAUX

TP106

C150

47pF

SCL

SDA

R125

3.0K

C3

.01

P50

R186

R187

DEM

XT1

XT0

C114

0.22/35V

1

OE2

OUT

IN

OUT

IN

OUT

IN

OUT

IN

75

75

19

18

17

16

15

14

13

12

1110

R185

C1

.01

U1

LM78M05

75

TP161

TP163

TP105

TP108

TP102

TP103

TP138

NEAR U100

TP175

3

DSP1-FLAG1

RFS

DSP1-FLAG0

SCLK-F

DSP2-FLAG1

SDOUT1-F

DSP2-FLAG0

UC-CLP

SHT 2

+5VD

TP114

40 19

U100

8

7

TP162

37

38

34

33

32

36

35

44

43

1

27

2

42

6

3

5

4

30

31

28

29

17

C115

.022

SHIELD

R5

100

C7

47pF

SHIELD

+5V-REG

2

L2

BEAD

C8

1.0uF

PLACE UNDER CODEC PIN 19 PLACE UNDER CODEC PIN 40

CS4226

RX1

+5VA

C5

1.0uF

SHT 3

SHT 3

DSP2-DT1

P07

P06

SHT 2

P03

P02

+5VA

TP113

21

AOUT1-F

22

AOUT2-F

23

AOUT3-F

24

AOUT4-F

25

AOUT5-F

26

AOUT6-F

20

14

AIN1L

13

AIN1R

11

12

10

TP180

9

15

16

TP150

C116

2.2uF/10V

TP136

R176

1

2

2.0

+5VD

C6

1.0uF

R175

1M

R3

2.0

184139

XT1

TP137

XT0

L1

BEAD

CMOUT

HC-49/S

TP116

R12

2.0K

CR100

11.2896MHz

TP177

TP178

C139

39pF

C140

39pF

+5VD

R9

R8

R6

3.48K

C4

330pF

2

R131

10.0K

R188

1.00k

ALL

TP152

R136

10.0K

ALL

TP154 TP153

R141

10.0K

TP101

ALL

TP156 TP155

R146

10.0K

ALL

TP158 TP157

R151

10.0K

ALL

TP160 TP159

R156

10.0K

TP164

R190

1.00K

10

13

12

R152

60.4K

2

3

C160

1000pF

R157

60.4K

6

5

C155

100pF

R132

60.4k

C156

100pF

C157

100pF

R142

60.4K

C158

100pF

R147

60.4K

C159

100pF

2

3

R137

60.4K

6

5

9

-

+

-

+

TP148TP147

R150

R155

R160

R135

R140

R145

200

200

200

TP130

200

TP131

200

TP132

200

TP133

TP134

TP135

AMP-GND-SENSE

-

1

1/4

+

TL074

U103

R189

6.04k

TP151

-

7

1/4

+

TL074

U103

-

8

1/4

+

TL074

U103

-

14

1/4

+

TL074

U103

1

1/4

TL074

U104

7

1/4

TL074

U104

R191

6.04K

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Digital Signal Processor (DSP)

PCB P/N: 256431 Rev. 00

Service Manual Part Number 263494 Rev. 00

Sheet 1 of 4

2345678

R193

300

C121

.001

AMP-GND-SENSE

R194

300

C124

.001

R195

300

C127

.001

R196

300

C130

.001

R197

300

C135

.001

R198

300

C138

.001

+12V

C131 C132

.01 .01

BYPASS TL074

PINS 4 AND 11

+12V

C145

.01

BYPASS TL074

PINS 4 AND 11

L-EQAUD

SHT 4

C-EQAUD

-12V

SHT 4

-12V

SHT 4

RS-EQAUD

B-EQAUD

1

SHT 4

SHT 4

R-EQAUD

C144

.01

SHT 4

DD

C

B

R

A

8

7

6543 1

2

C

B

+3.3V

+5V

R206

2.80K

R207

10K,THERMISTOR

PLACE TOPSIDE

R208

10K

DC_OFFSET

(SHT 1 J9-5)

P66

SHIELD

TP202

TP203

TP228

TP224

TP216

TP234

TP217

TP218

TP219

TP220

TP201

TP265

C207

1.0/25V

+5V-REG

TP221

+5V

P00

PG 1

PG 1

+5V

+5V

P01

P04

P05

PG 1

P06

PG 1

P07

UC-CLP

R282

20K

BEAD

L200

C208

1.0/25V

DD

SHIELD

R246

P02

P03

+5V

R230

R219

R232

200K

NV

UC-CLP

20K

ZR200

5.6V

R270

TP214

.001

C209

P50

R233

200K

R234

300

PLACE NEAR J5

CD-5 SER DATA IN

SER-DATA-IN

(SHT 1 J9-6)

2K

P72

P73

P72

P73

R256

2.0K

PG 1
P74

PG5 C/4

TP226

C214

ZR201

.001

5.6V

INH

R257

Q204

300

TP240

MMBT30904

TTY-OUT

(SHT 1 J9-8)

+5V

R275

30K
5%

R260

1K
5%

SHIELD

SPDIF-IN2

(SHT 1)

TP223

C215

330pF

TP237

R261

10K

R262

TP227

1K

P17

+5V

R263

30K
5%

TP329

Q201

MMBT30904

C216

330pF

R266

1K

R247

C211

NV

330pF

5%

R248

1K

R249

C212

NV

330pF

5%

R250

1K

R251

C213

NV

330pF

5%

+5V

R252

10K

P64

1K

+3.3V

R254

10K

Q200

2SC3395

MUTE-LR

(SHT 4 J8-18)

MUTE-C

(SHT 4 J8-15)

MUTE-LSRSP74

(SHT 4 J8-16)

DSP-RESET

(SHT 4)

C

B

C205

33pF

C206

TP200

CMOUT

LEGACY TESTPOINT

DO NOT DELETE

P62

P63

R211

301K

M353

+5V

P65

33pF

MAX809x

OVL-ERR

SHUTDOWN

(SHT 1 J9-4)

C203

+5V

1
2
3
7

R217

100K

.01

P15

P16

+5V

TP215

R216

20K

R255

TP236

2K

+5V

R226

40.2K

U201

8
6
5
4

24C02A

+5V

D202

BAV99L

C204

SPEAKER OUTPUT

DC OFFSET

10uF/25V

U200

SDA

SCL

+5V

3

1

+5V

TP222

TP233

CLIP

(SHT 4 J8-13)

X600

2

8MHz

TP232

M200

RESET

R268

2k

R218

20K

R253

2K

R265

2K

P60

P61

P62

P63

P64

P65

P66

TP271

MICROCONTROLLER

TP231

15
16

14

R280

10K

TP270

29

30

TP250

31

TP225

32

TP238

33

TP204

34

P15

TP205

35

P16

TP206

36

P17

37

38

TRST

TP213

39

TP207

19

TP208

20

TP209

21

TP210

22

TP235

23

TP211

24

TP212

25

26

13

U202

40
18

12

11

10

9

8

7

6

5

27

28

4

3

2

1

44

43

42

41

17

R281

20K

C217

R245

10K

.001

TP229

TMP87C447

D200

MBAV70L

R244

+5V

10K

R

A

A

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Digital Signal Processor (DSP)

PCB P/N: 256431 Rev. 00

Service Manual Part Number 263494 Rev. 00

2345678

Sheet 2 of 4

1

C

B

A

8

7

6543 1

2

DSP1

113
114

DATA31
DATA30
DATA29
DATA28
DATA27
DATA26
DATA25
DATA24
DATA23
DATA22
DATA21
DATA20
DATA19
DATA18
DATA17
DATA16

DATA31

DATA30
DATA29
DATA28
DATA27
DATA26
DATA25
DATA24
DATA23
DATA22
DATA21
DATA20
DATA19
DATA18
DATA17
DATA16

TP427
TP426
TP425
TP424

TP423

TP422
TP421

TP420
TP419

TP418
TP417

TP416

TP415
TP414
TP413

115
117
118
119
121
122
123
125
126
127
130
131
132
136
137
138
140
141
142
145
146
147
149
150
151
153
154
155
157
158
159
161
162
163
165
166
167
169
170
171
173
174
175
177
178
179

66
65
64
60
52
51
50
46
45
44
42
41
40
37
36
35
33
32
30
29
28
26
25
24
22
21
20
18
17
16
14
13

ADDR31-1

ADDR30-1
ADDR29-1
ADDR28-1

ADDR27-1
ADDR26-1
ADDR25-1
ADDR24-1
ADDR23-1

ADDR22-1

TP476
TP475
TP474
TP473

TP472
TP471
TP470
TP469

TP468
TP467

TP466
TP465

TP464
TP463
TP461

TP460
TP459

R425
R425
R425
R425
R426
R426
R427
R427
R427
R427

ADDR21
ADDR20
ADDR19
ADDR18
ADDR17
ADDR16
ADDR15
ADDR14
ADDR13
ADDR12
ADDR11
ADDR10

ADDR9

ADDR8
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0

NV

87

65

NV

43

NV

21

NV

43

NV

21

NV

87

NV

65

NV

43

NV

21

NV

DSP1-FLAG3
DSP1-FLAG2

+3.3V +3.3V

R415 R416

3.9K 3.9K

DSP1-FLAG1
DSP1-FLAG0

+3.3V

DSP1-TDI

DSP1-TD0

+3.3V

BMS

+3.3V

DSP1-DR1
DSP1-RCLK1
DSP1-RFS1

DSP1-TCLK0

DSP1-TFS0

DSP2-TCLK0

DSP2-TFS0

C414

.033

TRST

EMU
TCK

TMS

DSP1-DT0

DSP2-DT0

C415

.033

239

240

TP437

R405

3.9K

.033

TP436

TP434

TP435

TP432

TP433

C416

10

11

129

204

54

55

56

57

59

68

72

73

74

75

76

77

80

81

82

83

84

85

C417 C418 C419 C420 C422C421 C423 C424 C425

.033 .033 .033 .033 .033.033 .033 .033 .033

DSP2

113
114
115
117
118
119
121
122
123
125
126
127
130
131
132
136
137
138
140
141
142
145
146
147
149
150
151
153
154
155
157
158
159
161
162
163
165
166
167
169
170
171
173
174
175
177
178
179

66
65
64
60
52
51
50
46
45
44
42
41
40
37
36
35
33
32
30
29
28
26
25
24
22
21
20
18
17
16
14
13

ADDR31-2
ADDR30-2
ADDR29-2

ADDR28-2

ADDR27-2
ADDR26-2
ADDR25-2
ADDR24-2

ADDR23-2
ADDR22-2

R428
R428
R428
R429
R429
R429
R430
R430
R430
R430

ADDR21
ADDR20
ADDR19
ADDR18
ADDR17
ADDR16
ADDR15
ADDR14
ADDR13
ADDR12
ADDR11
ADDR10
ADDR9

ADDR8
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0

65

NV

43

NV

21

NV

65

NV

43

NV

21

NV

87

NV

65

NV

43

NV

21

NV

DSP2-FLAG3
DSP2-FLAG2

R417

3.9K

DSP2-DT1

+3.3V

+3.3V+3.3V

R418

3.9K

DSP2-FLAG1
DSP2-FLAG0

R435

3.9K

DSP1-RCLK1

DSP1-RFS1

DSP2-DT0

DSP2-TCLK0

DSP2-TFS0

DSP1-DT0

DSP1-TCLK0

DSP1-TFS0

BMS

+3.3V

DSP1-TD0

TRST

DSP2-TD0

EMU
TCK
TMS

TP447

TP438

TP406

TP439

TP442

TP443

TP444

TP440

TP441

TP445

TP446

TP450

TP481

TP482

1

2

4

6

239

240

5

8

9

10

11

7

129

204

54

55

56

57

59

68

72

73

74

75

76

77

80

81

82

83

84

85

DSP1

1

2

4

6

5

8

9

7

DSP2

236

237

238

235

232

234

79

233

229

230

231

104

TP412

105

TP411

106

TP410

107

TP409

108

TP408

109

TP407

98

102

58

89

99

94

93

92

90

91

71

100

69

101

R419

70

3.9K

R420

3.9K

236

237

238

235

232

234

79

233

229

230

231

104

105

106

107

108

109

98

102

58

89

99

94

93

92

90

91

71

100

69

TP429

101

70

TP428

C410

33pF

C411

33pF

TP480

R410

3.9K

TP448

TP405

TP458

TP455

TP449

TP430

TP431

TP477

DSP1-IRQ2

+3.3V

+3.3V

+3.3V

GND

DSP-RESET

GND

GND

GND
GND

+3.3V

BR6
BR5
BR4
BR3
BR2
BR1

DSP1-CLKIN

+3.3V

SW
ADRCLK
ACK

WR

RD

+3.3V

+3.3V

+3.3V

+3.3V

DMAG1

+3.3V

DMAR1

C426

.033

+3.3V

DSP2-IRQ1

+3.3V

+3.3V

GND

DSP-RESET

GND

GND

GND

+3.3V

GNDGND

BR6
BR5
BR4
BR3
BR2
BR1

DSP2-CLKIN

SW

ADRCLK
ACK

WR

RD

+3.3V

+3.3V

DMAG1

DMAR1

C427 C428 C429

.033 .033 .033

C402

33pF

C403

33pF

R412

510

DSP1-CLKIN

DSP2-CLKIN

JTAG-CLKIN

+3.3V

6

3.9K

ADRCLK

4

2

3.9K

R404R404

3

1

3.9K

R404 R404

5

RD

8

3.9K

4 GATES

7

DD

WR

+3.3V

2

1

TP403

TP404

6

4

3.9K

3.9K

3.9K

R421

R421

BR2

C400

.033

4 GATES

5

3

BR1

C

ADDR18

ADDR17

ADDR14

ADDR13

ADDR8

ADDR9

ADDR11

RD

ADDR10

BMS

DATA23

DATA22

DATA21

DATA20

DATA19

ADDR16

ADDR15

ADDR12

ADDR7

ADDR6

ADDR5

ADDR4

ADDR3

ADDR2

ADDR1

ADDR0

DATA16

DATA17

DATA18

TP402

TP401

TP400

+3.3V

R222

10K

4 GATES

R402

BR6

4

R402

BR5

6

3.9K

3.9K

R402

3

5

BR4

R421

BR3

+3.3V

WR

2

3.9K

1

U401

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

32

R400

31

NV

TP457

30

29

28

27

26

25

24

23

22

21

20

19

18

1716

PART MOUNTED IN SOCKET

B

TP451

1

CR400

40MHz

HC-49/S

2

TP454

R409

R406

R407

R408

R411

3K

+3.3V

TP456

510

1
2

3

40MHZ

TP452

TP453

4

5

6

75

75

75

+3.3V

U400

VCC

GND

C404

14

.033

13

12

40MHZ

11

10

9

87

J401

NV

EZ-ICE_EMULATOR

21

43

65

87

109

1211

1413

EMU

JTAG-CLKIN

TMS

TCK

TRST

DSP1-TDI

DSP2-TD0

R

A

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Digital Signal Processor (DSP)

PCB P/N: 256431 Rev. 00

Service Manual Part Number 263494 Rev. 00

2345678

Sheet 3 of 4

1

C

8

+3.3V

15

23

31

38

39

47

49

62

63

86

87

96

103

111

116

124

133

134

143

144

152

160

168

176

188

197

205

219

221

DSP1

3

7

12

19

27

34

43

48

53

61

67

78

88

95

97

110

112

120

128

135

139

148

156

164

172

180

181

195

196

212

220

228

GND

6543 1

TP510

R510

DSP1

182

183

184

185

186

187

189

190

191

192

193

194

198

199

200

201

202

227

226

225

224

223

222

218

217

216

215

214

213

211

210

209

208

207

206203

+3.3V

C500

470

L500

90uH

D500

SOD6

R500

48.7K

C501

.0012

TP501

TP504

C503

0.22
FILM

TP500

L501

22uH

1
2
3
4
5
6
7
8
9

C504

.033

C505

470uF/25V

U500

20
19
18

TP505

17
16
15
14

TP502

13
12
1110

C515

10uF/25V

+17V-FUSED

100

Q500

2SC3395

C506

0.47uF

TP503

R501

301K

TP508

C508

33pF

C507 C509

.0033 .0012

R502

49.9K

+3.3V

R503

4.99K

INH

TP507

2

DD

C

M301

MUTE-LR

MUTE-C

RS-EQAUD

CLIP

B-EQAUD

LS-EQAUD

L-EQAUD

C-EQAUD

R-EQAUD

PROTECT

M306

M303

M302

M305

M304

M308

M307

M310

M309

M312

M311

M314

-12V
M313

M315

M360

M316

+12V

M361

+3.3V

15

23

31

38

39

+3.3V +3.3V

47

49

62

63

86

87

96

103

111

116

124

133

134

143

144

152

160

168

176

188

197

205

219

221

B

DSP2

3

12

19

27

34

43

48

53

61

67

78

88

95

97

110

112

120

128

135

139

148

156

164

172

180

181

195

196

212

220

228

GND

DSP2

182

183

184

185

186

187

189

190

191

192

193

194

198

199

200

201

202

227

226

225

224

223

222

218

217

216

215

214

213

211

210

209

208

207

206203

CABLE-CONT

MUTE-LSRS

AMP-GND-SENSE

+17V-FUSED

A

TP308

18

J8

17

J8

16

J8

15

J8

14

J8

13

J8

12

J8

11

J8

10

J8

9

J8

8

J8

7

J8

6

J8

5

J8

4

J8

3

J8

2

J8

1

J8

B

R

A

FRAMINGHAM, MA 01701-9168

TA-1 Home Theater Amplifier

Digital Signal Processor (DSP)

PCB P/N: 256431 Rev. 00

Service Manual Part Number 263494 Rev. 00

2345678

Sheet 4 of 4

1