Bose BUILT-INVISIBLE TA-1 Service Manual

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