B and K AVR-305, AVR-307 Service manual
$95
SERVICE MANUAL
B&K COMPONENTS, LTD.
2100 Old Union Road
Buffalo, New York 14227-2725
U.S.A.
6FKHPDWLFV
B&K COMPONENTS, LTD.
2100 Old Union Road
Buffalo, New York 14227-2725
U.S.A.
D
C
B
A
TUN_A_R
TUN_A_L
V1_A_In_R
V1_A_In_L
V2_A_In_R
V2_A_In_L
V3_A_In_R
V3_A_In_L
DVD_A_In_R
DVD_A_In_L
CD_A_In_R
CD_A_In_L
SAT_A_In_R
SAT_A_In_L
TAP_A_In_R
TAP_A_In_L
DVDA_In_S
DVDA_In_C
DVDA_In_Rr
DVDA_In_Lr
DVDA_In_Rf
DVDA_In_Lf
LF
RF
V2B_R
V2B_L
V2_R
V2_L
Lx_Aud
Rx_Aud
Sub_Aud
C_Aud
Lr_Aud
Rr_Aud
Lf_Aud
Rf_Aud
Sub_VOL
C_VOL
Rr_VOL
Lr_VOL
Rf_VOL
Lf_VOL
Rx_VOL
~Sel_Rst
Aud_Sys_En
M1_En
M2_En
Aud_En
SPI_Out
SPI_Clk
I2C_Data
I2C_Clk
54321
R71 1K
TUN_R
TUN_L
R72 1K
R61 1K
V1_R
V1_L
R62 1K
R63 1K
V2_R
V2_L
R64 1K
R65 1K
V3_R
V3_L
R66 1K
R67 1K
DVD_R
DVD_L
R68 1K
R69 1K
CD_R
CD_L
R70 1K
R73 1K
SAT_R
SAT_L
R74 1K
R75 1K
TAP_R
TAP_L
R76 1K
R157 1K
DVDA_S
DVDA_C
R158 1K
R159 1K
DVDA_Rr
DVDA_Lr
R160 1K
R161 1K
DVDA_Rf
DVDA_Lf
R162 1K
LF
RF
V2B_R
V2B_L
V2_R
V2_L
Lx_Aud
Rx_Aud
Sub_Aud
C_Aud
Lr_Aud
Rr_Aud
Lf_Aud
Rf_Aud
Sub_VOL
C_VOL
Rr_VOL
Lr_VOL
Rf_VOL
Lf_VOL
Rx_VOL
~Sel_Rst
Aud_Sys_En
M1_En
M2_En
Aud_En
SPI_Out
SPI_Clk
I2C_Data
I2C_Clk
1 2 3 4 56
Z1 AUDIO SELECTOR
LC7821
U14
TUN_L
L11R1
V1_L
2
L2
3
V2_L
L3
4
V3_L
L4
5
LCM1
6
DVD_L
L5
7
CD_L
L6
TAPB_L TAPB_R
8
LCM2
9
SAT_L
L7
10
DVDA_Lt
L8
11
LCM3
12
VEE
Aud_En
13
CE
14
SPI_Out
DI
15
SPI_Clk
CLK
~Sel_Rst
MISC Z1 AUDIO SELECTOR
U25
V1B_L V1B_R
L11R1
TAPB_L TAPB_R
2
L2
Lt_Aud Rt_Aud
3
L3
TAP_L TAP_R
4
L4
5
A_Lf A_Rf
LCM1
6
L5
DVDA_Lr DVDA_Rr
7
L6
Z1_A_L Z1_A_R
8
LCM2
Rx_Aud
9
L7
DVDA_S
10
L8
Rx_VOL
11
LCM3
12
VEE
M1_En
13
CE
14
SPI_Out
DI
15
SPI_Clk
CLK
~Sel_Rst
Note: Lx_Aud is not switched
R137
24.3K
DVDA_Rr
R138
24.3K
DVDA_Lr
ADC
DAC_F
DAC_C
DAC_R
DAC_X
DAC_T
DSP_Sckt
DSP_Fst
Mclk
Z1_SPDIF_In
R2
R3
R4
RCM1
R5
R6
RCM2
R7
R8
RCM3
VDD
RST
S
VSS
LC7821
R2
R3
R4
RCM1
R5
R6
RCM2
R7
R8
RCM3
VDD
RST
S
VSS
5
DVDA_Rs
6
ADC
DAC_F
DAC_C
DAC_R
DAC_X
DAC_T
DSP_Sckt
DSP_Fst
Mclk
Z1_SPDIF_In
30
29
28
27
26
25
24
23
22
21
DVDA_Rt
20
19
18
17
16
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
U31B
LF353
R136
TUN_R
V1_R
V2_R
V3_R
DVD_R
CD_R
SAT_R
+15-15
+15-15
7
24.3K
Z2 AUDIO SELECTOR
U16 LC7821
TUN_L
L11R1
V1_L
2
L2
R2
3
DVDA_Lt
L3
R3
4
V3_L
L4
R4
5
LCM1
RCM1
6
DVD_L
L5
R5
7
CD_L
L6
V2B_L V2B_R
SAT_L
TAP_L
Aud_En
SPI_Out
SPI_Clk
~Sel_Rst
C84
R139
10K
DVDA_C
DVDA_S
DVDA_Rf
DVDA_C
DVDA_S
DVDA_Lf
R6
8
LCM2
RCM2
9
L7
R7
10
L8
R8
11
LCM3
RCM3
12
VEE
VDD
13
CE
RST
14
15
R190
R135
R40
R191
R188
R134
R39
R189
.1uF
C85
.1uF
DI
CLK
3
2
VSS
+15
84
~DVDA_Rs
U31A
LF353
-15
15K
15K
17.4K
10K
15K
15K
17.4K
10K
S
R140
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
1
10K
5
DVDA_Rt
6
3
DVDA_Lt
2
MISC 5.1 AUDIO SELECTOR
A_Lf A_Rf
TUN_R
V1_R
DVDA_Rt
V3_R
DVD_R
CD_R
SAT_R
TAP_R
R187
+15
84
R186
-15
+15-15
U30B
LF353
U30A
LF353
2
Lf_Aud Rf_Aud
3
DVDA_Lf DVDA_Rf
4
5
Lf_VOL Rf_VOL
Lr_Aud
6
DVDA_Lr DVDA_Rr
7
Lr_VOL Rr_VOL
8
C_Aud Sub_Aud
9
DVDA_C DVDA_S
10
C_VOL Sub_VOL
11
12
M2_En
13
14
SPI_Out
15
SPI_Clk
~Sel_Rst
RF
LF
7
DVDA_Rt
3.01K
1
DVDA_Lt
3.01K
U26
L11R1
L2
L3
L4
LCM1
L5
L6
LCM2
L7
L8
LCM3
VEE
CE
DI
CLK
LC7821
RCM1
RCM2
RCM3
VDD
RST
VSS
AUDIO SYSTEM
JP1
DAC_X
Sub_Aud
C_Aud
Rr_Aud
Lr_Aud
Rf_Aud
+15-15
Lf_Aud
+5
-5
HEADPHONE BUFFER
+15
84
3
R_HEAD
2
-15
5
L_HEAD
6
DAC_T
I2C_Clk
I2C_Data
M_~PDN
Mclk
C70
.1uF
U21A
LF353
C71
.1uF
U21B
LF353
1
7
R103
17.4K
R104
17.4K
30
29
R2
28
R3
27
R4
26
Rr_Aud
25
R5
24
R6
23
22
R7
21
R8
20
19
18
17
S
16
R102
17.4K
R101
17.4K
Z1_SPDIF_In
39 40
ADC
37 38
Aud_Sys_En
35 36
DSP_Sckt
33 34
DAC_C
31 32
DSP_Fst
29 30
DAC_F
27 28
DAC_R
25 26
23 24
21 22
Lx_Aud
19 20
Rx_Aud
17 18
15 16
Rt_Aud
13 14
Lt_Aud
11 12
9 10
7 8
5 6
Z1_A_L
3 4
Z1_A_R
1 2
RECEPTACLE 2X20
R99
47.5
R100
47.5
+15
C33
C44
.1uF
.1uF
C41
C43
.1uF
.1uF
-15
R81
JUMPER
C42
.1uF
C45
.1uF
R82
JUMPER
TAPB_L
TAPB_R
+5
-5
V1B_L
V1B_R
W21
R_Hp
W8
GND
W19
L_Hp
+15
-15
V2B_L
V2B_R
+15
C31
.33uF
84
3
2
R59
1M
3
2
R83
1M
3
2
R91
1M
U5A
R56
1
TAP_R
C32
.33uF
-15
+15
84
V1_R
-15
+15
84
V2_R
-15
Title
B
Date: 7-Aug-2000 Sheet of
File: C:\B&k_Data\BKPROD\SeriesII\Manufac\PCB_Current\12798a02.ddbDrawn By:
221
LF353
U6A
1
LF353
U7A
1
LF353
5
TAP_L
6
R60
1M
R80
221
5
V1_L
6
R84
1M
R88
221
5
V2_L
6
R92
1M
AVR Series II Audio Selector
Number RevisionSize
B&K p\n 12798a0S
U5B
7
LF353
U6B
7
LF353
U7B
7
LF353
6
TAPE LINE OUTPUT
TAP_A_Out_L
R55
TAP_A_Out_R
221
V1 LINE OUTPUT
R79
221
V2/Z2 LINE OUTPUT
R87
221
A
V1_A_Out_L
V1_A_Out_R
V2_A_Out_L
V2_A_Out_R
1 of 1
ESM
D
C
B
A
54321
6
D
C
B
A
DAC_T
DAC_X
DAC_F
DAC_C
DAC_R
DSP_Sckt
DSP_Fst
Z1_SPDIF_In
M_~PDN
XILINX I/O PORTS
I2C_Data
Ser_Data
Z86_Data
LED_St
Comp_Vid_Sel
S_Vid_Sel
EXTL
3.58MHz
Sys_Clk
CONT1
CONT2
CONT3
CONT4
Ser_Clk
I2C_Clk
SPI_Clk
~VFD_Clk
Ser_Busy
SPI_Out
~Z86_Int
Sclk
Sync
Mclk
ADC
M2_En
M1_En
Aud_En
~DSP_En
~OSD_En
PLL_En
Ser_En
~Vol_En
~SPDIF_En
Aud_Sys_En
~Z2_Rly_En
~Z1_Rly_En
IR_Data
Aud_I_Det
Aud_O_Det
Sta_Det
MPX_Det
~Vid_Det
Ser_Rd
Ser_Wr
SPI_In
Z86_Clk
~Program
DAC_F
DAC_R
SPI_In
SPI_Out
~DSP_Rst
EXTL
~SPDIF_En
Ser_Wr
Ser_Rd
RS232_RXD
RS232_TXD
Ser_En
~Program
Ser_Data
Ser_Clk
Ser_Busy
~Z86_Int
Sys_Clk
~Amp_En
DSP RECEPTACLE
JP5
RECEPTACLE 2X20
JP3
VCC
VCC
RECEPTACLE 2X20
~Amp_En
I/O
3940
3738
3536
3334
3132
2930
2728
2526
2324
2122
1920
1718
1516
1314
1112
910
78
56
34
12
12
34
56
78
910
1112
1314
1516
1718
1920
2122
2324
2526
2728
2930
3132
3334
3536
3738
3940
SPI_Clk
DSP_I2S_In
Z1/Z2_SPDIF_O
DSP_Sckt
DSP_Fst
DAC_C
DSP_Hckt
~DSP_En
DAC_X
DAC_T
VCC
SPDIF_R_O
Z1_SPDIF_In
AON
W18
VCC
+5
W16
+
C69
100uF/25V
JP7
HEADER 2X20
FRONT PANEL CONNECTORDALLAS CONTROLLER RECEPTACLE
39 40
37 38
35 36
33 34
31 32
29 30
27 28
25 26
23 24
21 22
19 20
17 18
15 16
13 14
11 12
9 10
7 8
5 6
3 4
1 2
Z86_Data
Z86_Clk
SPI_Out
SPI_Clk
~VFD_Clk
LED_St
3.58MHz
IR_Data
LED_A
LED_K
~VFD_Rst
XDISPB
FL2
W28
FL2
FL1
VCC
R97
3.01K
R37
26.7K
SPI_Clk
~Z1_Rly_En
~Z2_Rly_En
77
78
76
Gnd
~Z2_Rly_En
~Z1_Rly_En
Gnd52Done
MPX_Det50Sta_Det
51
MPX_Det
Sta_Det
C57
.1uF
75
nc
53
Done
~Amp_En
Amp_En
C_Clk
Ser_Data
Ser_Clk
CONT2
CONT4
CONT3
CONT1
Amp_En
Ser_Wr
Ser_Rd
Ser_En
Sys_Clk
~Z86_Int
~Program
Vcc
Gnd
Vcc
Vcc
U18
nc
nc
nc
XC10
Rd_Trig
Rd_Data
IR_Data
~Program
Done
VCC
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
VCC
Ser_Clk
Ser_Data
Ser_Clk
CONT2
CONT4
CONT3
CONT1
Amp_En
Ser_Wr
Ser_Rd
Ser_En
Sys_Clk
~Z86_Int
~Program
VCC
VCC
R57
OPEN
R54
R58
R78
OPEN
10K
R77
10K
10K
R132
VCC
R133
10K
10K
Z1_SPDIF_In
Z2_SPDIF_In
Dig_En
Aud_Sys_En
DSP_I2S_In
SPI_In
DSP_Fst
EXTL
VCC
~SPDIF_En
DSP_Hckt
~DSP_En
SPDIF_R_O
Aud_En
~OSD_En
~Vid_Det
Rd_Data
Rd_Trig
R2
2.49K
R85
C56
.1uF
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
OPEN
C60
.1uF
U19
8
VCC
7
NC
6
SCL
5
SDA
24C128
VCC
11
Gnd
Z1_SPDIF_In
Z2_SPDIF_In
Dig_En
Aud_Sys_En
DSP_I2S_In
SPI_In
DSP_Fst
EXTL
Gnd
Vcc
~SPDIF_En
DSP_Hckt
~DSP_En
SPDIF_R_I2S_O
Aud_In_En
~OSD_En
~Vid_Det
nc
Gnd
Mode
33
R86
3.58MHz
R53
C61
.1uF
1
A0
2
A1
3
A2
4
VSS
~Vol_En
I2C_Clk
Mclk
ADC
I2C_Data
9
7
8
10
6
Vcc
ADC
Mclk
I2C_Clk
~Vol_En
I2C_Data
IR_Data
Vcc
Ser_Busy
nc38Vcc42Gnd43LED_St45~VFD_Clk
nc
nc
35
36
34
37
Ser_Busy
IR_Data
10K
100
VCC
C62
.1uF
39
C63
.1uF
4
nc5nc
nc
40
VCC
3
2
nc
XILINX
~Init
3.58MHz
41
VCC
Q12
2N5210
R8
100
M1_En
M2_En
Aud_O_Det
Aud_I_Det
SPI_Out
80
81
84
83
1
Vcc
79
82
Gnd
M1_En
M2_En
SPI_Clk
SPI_Out
Aud_O_Det
Aud_I_DET
nc
Z86_Data
Z86_Clk
PLL_En
44
48
47
46
49
Z86_Clk
~VFD_Clk
LED_St
PLL_En
Z86_Data
C58
C59
.1uF
.1uF
DAC_T
DAC_X
DAC_F
DAC_C
DAC_R
DSP_Sckt
DSP_Fst
Z1_SPDIF_In
M_~PDN
I2C_Data
Ser_Data
Z86_Data
LED_St
Comp_Vid_Sel
S_Vid_Sel
EXTL
3.58MHz
Sys_Clk
CONT1
CONT2
CONT3
CONT4
Ser_Clk
I2C_Clk
SPI_Clk
~VFD_Clk
Ser_Busy
SPI_Out
~Z86_Int
Sclk
Sync
Mclk
ADC
M2_En
M1_En
Aud_En
~DSP_En
~OSD_En
PLL_En
Ser_En
~Vol_En
~SPDIF_En
Aud_Sys_En
~Z2_Rly_En
~Z1_Rly_En
IR_Data
Aud_I_Det
Aud_O_Det
Sta_Det
MPX_Det
~Vid_Det
Ser_Rd
Ser_Wr
SPI_In
Z86_Clk
~Program
I2C_Clk
I2C_Data
1 2 3 4 56
DIGITAL I/O CONNECTOR
Z1_SPDIF_In Z1/Z2_SPDIF_O
Z2_SPDIF_In
FL1
W29
JP9
910
Z1/Z2_SPDIF_O
78
SPI_Out
56
SPI_Clk
34
Dig_En
12
HEADER 2X5
JP8
HEADER 2X20
VIDEO SYSTEM
Title
Number RevisionSize
B
Date: 7-Aug-2000 Sheet of
File: C:\B&k_Data\BKPROD\SeriesII\Manufac\PCB_Current\12798a02.ddbDrawn By:
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
C50 1uF/50V
C46
1uF/50V
+
C47 1uF/50V
+
+
V1_V_In
V2_V_In
V3_V_In
DVD_V_In
CD_V_In
SAT_V_In
TAP_V_In
TAP_V_Out
V1_V_Out
V2_V_Out
Z2_V_Out
Z1_V_Out
I2C_Data
I2C_Clk
M_Sys_Clk
~OSD_En
SPI_Clk
SPI_Out
~Vid_Det
S_Vid_Sel
Comp_Vid_Sel
U17
2
V+
1
C1+
3
C1-
14
T1O
13
R1I
7
T2O
8
R2I
6
V-
MAX232smt
AVR Series II Digital Control
B&K p\n 12798a0D
VCC
R1O
R2O
GND
C2+
C2T1I
T2I
V1_V_In
V2_V_In
V3_V_In
DVD_V_In
CD_V_In
SAT_V_In
TAP_V_In
Z1_V_Out
Z2_V_Out
V2_V_Out
V1_V_Out
TAPE_V_Out
LED_A
LED_K
~DSP_Rst
~VFD_Rst
RS232_In
RS232_Out
VCC
16
4
5
11
12
10
9
15
+
C49
1uF/50V
V1_V_In
V2_V_In
V3_V_In
DVD_V_In
CD_V_In
SAT_V_In
TAP_V_In
Z1_V_Out
Z2_V_Out
V2_V_Out
V1_V_Out
TAPE_V_Out
LED_A
LED_K
~DSP_Rst
~VFD_Rst
C48 .1uF
RS232_TXD
RS232_RXD
A
1 of 1
ESM
D
C
B
A
CON2 RCA_RWY_X3
D
V1_A_In_R
V1_A_In_L
V1_V_In
V2_A_In_R
V2_A_In_L
V2_V_In
V3_A_In_R
V3_A_In_L
V3_V_In
DVD_A_In_R
DVD_A_In_L
DVD_V_In
CD_A_In_R
CD_A_In_L
CD_V_In
SAT_A_In_R
C
SAT_A_In_L
SAT_V_In
TAP_A_In_R
TAP_A_In_L
TAP_V_In
AM_ANT
B
4 8
CON1
1
2
AM PC MOUNT
Y
W
R
A/V INPUT SIGNALS
12
CON3 RCA_RWY_X3
Y
W
4 8
R
12
CON4 RCA_RWY_X3
Y
W
4 8
R
CONT1 CONT2 CONT3 CONT4
CON13
+12
CON18
+12
CON5 RCA_RWY_X3
12
4 8
Y
W
R
CON6 RCA_RWY_X2
Z1_V_OutTAP_V_In V1_V_OutSAT_V_In TAP_V_OutCD_V_In Z2_V_OutDVD_V_In V2_V_OutV3_V_InV1_V_In V2_V_In
12
G
W
R
4 8
CON7 RCA_RWY_X2
G
W
R
4 8
A/V OUTPUT SIGNALS
CONT1 CONT2 CONT3 CONT4
ZD11
1N748
R131
10K
Q8
2N5210
R127
10K
R149
1.5K
R181
68.1
Q15
TIP32C
D7
DL4002
R182
3.01K
ZD10
1N748
R130
10K
Q7
2N5210
R126
10K
R148
1.5K
+12+12
R180
ZD9
68.1
1N748
Q14
TIP32C
R129
10K
D8
DL4002
R183
3.01K
Q6
2N5210
R125
10K
R147
1.5K
+12
R179
68.1
Q13
TIP32C
D9
DL4002
R184
3.01K
RS-232 I/O
RS232_In
RS232_Out
LED_K
LED_A
Z2 IR IN
R177
Z1 IR IN
6
CON8
1
2
3
4
5
6
7
8
CON9
7275-8NB
CON10
7275-8NB
CON11
7275-8NB
CON12
4
3
2
1
D
T
B
T
B
C
T
B
Sa
Sb
B
RJ45
LED_K
LED_A
LL4148
D5
LL4148
D6
402
IEEE-1394-S4
JP2
Header 2X5
1 2
3 4
5 6
7 8
9 10
54321
DVD AUDIO INPUT
DVDA_In_S
DVDA_In_Lr
DVDA_In_Rr
DVDA_In_C
DVDA_In_Lf
DVDA_In_Rf
SUB
LR
RR
CENTER
LF
RF
Z1_V_Out
LX
RX
Z2_V_Out
Z2_A_Out_L
Z2_A_Out_R
V2_V_Out
V2_A_Out_L
V2_A_Out_R
V1_V_Out
V1_A_Out_L
V1_A_Out_R
TAP_V_Out
TAP_A_Out_L
TAP_A_Out_R
+12
R178
R124
ZD8
1N748
R128
10K
Q4
2N5210
10K
R146
1.5K
68.1
Q11
TIP32C
D10
DL4002
R185
3.01K
A
1 2 3 4 56
Title
Number RevisionSize
B
Date: 7-Aug-2000 Sheet of
File: C:\B&k_Data\BKPROD\SeriesII\Manufac\PCB_Current\12798a02.ddbDrawn By:
AVR Series II Connector/Control/Switch
B&K p\n 12798a0C
A
1 of 1
ESM
A
54321
U10 CS3310
9
16
7
3
6
2
VDD
8
1
R30
100K
C19
.1uF
U11 CS3310
9
16
7
3
6
2
VDD
8
1
U12 CS3310
9
16
7
3
6
2
VDD
8
1
U22 CS3310
9
16
7
3
6
2
VDD
8
1
AIR
AIL
SDATAO
SDATAI
SCLK
CS
MUTE
ZCEN
AIR
AIL
SDATAO
SDATAI
SCLK
CS
MUTE
ZCEN
AIR
AIL
SDATAO
SDATAI
SCLK
CS
MUTE
ZCEN
AIR
AIL
SDATAO
SDATAI
SCLK
CS
MUTE
ZCEN
C24
AOUTL
AOUTR
DGND
AGNDL
AGNDR
AOUTL
AOUTR
DGND
AGNDL
AGNDR
AOUTL
AOUTR
DGND
AGNDL
AGNDR
AOUTL
AOUTR
DGND
AGNDL
AGNDR
.1uF
VDD
+5
C18
.1uF
12
VA+
4
VD+
Lf_W
14
Rf_W
11
5
15
10
13
VA-
C17
.1uF
-5
C25
VDD
.1uF
+5
C21
.1uF
12
VA+
4
VD+
C_W
14
Lx_W
11
5
15
10
13
VA-
C20
.1uF
-5
C26
VDD
.1uF
C23
+5
.1uF
12
VA+
4
VD+
Lr_W
14
Rr_W
11
5
15
10
13
VA-
C22
.1uF
-5
C75
VDD
.1uF
C74
+5
.1uF
12
VA+
4
VD+
Rx_W
14
Sub_W
11
D3
LL4148
98
98
98
98
5
15
10
13
VA-
C73
.1uF
-5
R36
1.5K
Q16
2N5210
+15
LR
143
16
RL1
HAS212-05
1
5 12
SUB
RR
143
16
RL2
HAS212-05
1
5 12
LF
CENTER
143
16
RL3
HAS212-05
1
5 12
RF
LX
143
16
RL4
HAS212-05
1
5 12
RX
Rf_W
Rr_Dmx
C_Dmx
Sub_Dmx
Lf_W
Lr_Dmx
C_Dmx
Sub_Dmx
Sub_Out
C_Out
Rr_Out
Lr_Out
Rx_Out
Lx_W
R33
R29
R22
R45
R42
R28
R27
R46
R47
R50
R51
R52
R41
R152
+15
10K
10K
15K
10K
10K
10K
15K
10K
10K
10K
10K
10K
10K
10K
C15
.1uF
84
U2A
AD712
3
1
LF
2
R26
10K
C16
.1uF
-15
+15
C76
.1uF
84
3
1
CTR
2
U23A
AD712
R43
10K
C77
.1uF
-15
+15
C29
.1uF
84
3
1
LR
2
U4A
AD712
R49
10K
C30
.1uF
-15
U23B
AD712
5
7
LX
6
R105
10K
5
6
3
2
5
6
5
6
Title
Number RevisionSize
C
Date: 7-Aug-2000 Sheet of
File: C:\B&k_Data\BKPROD\SeriesII\Manufac\PCB_Current\12798a02.ddbDrawn By:
U2B
AD712
7
RF
R23
10K
+15
C27
.1uF
84
U3A
AD712
1
SUB
R44
10K
C28
.1uF
-15
U4B
AD712
7
RR
R48
10K
U3B
AD712
7
RX
R96
10K
AVR Series II Bass Management
B&K p\n 12798a0B
C36
.1uF
AOUTL
AOUTR
DGND
AGNDL
AGNDR
VDD
+5
C35
.1uF
VA+
VD+
VA-
3
2
5
6
R150
47.5K
R151
47.5K
12
4
14
11
5
15
10
13
+15
84
S_Inv
-15
Rx_Inv
-5
-5
W12
W2
W15
Z2R
GND
Rf_VOL
Lf_VOL
R93
221
Z2_A_Out_L
Z2_A_Out_R
R94
221
Z2L
W3
C34
.1uF
-5
U27A
LF353
1
Sub_Gain
R106
10K
U27B
LF353
7
Rx_Gain
R109
10K
R175
24.3K
R176
24.3K
C66
100uF/25V
+
SPI_D_4
SPI_D_3
SPI_Clk
~Vol_En
W17
GND
~Vol_Mute
~Vol_Mute
Lx_Aud
C_VOL
SPI_D_3
SPI_D_2
SPI_Clk
~Vol_En
~Vol_Mute
Rr_VOL
Lr_VOL
SPI_D_2
SPI_D_1
SPI_Clk
~Vol_En
~Vol_Mute
Sub_VOL
Rx_VOL
SPI_D_4
SPI_Clk
~Vol_En
~Vol_Mute
Z2_A_Out_L
Z2_A_Out_L
Z2_A_Out_R
Z2_A_Out_R
LF
LF
RF
RF
CENTER
CENTER
SUB
SUB
LR
LR
RR
RR
LX
LX
RX
RX
TAP_A_Out_L
TAP_A_Out_L
D
C
B
A
TAP_A_Out_R
V2B_L
V2B_R
V2_L
V2_R
Lt_Aud
Rt_Aud
Lx_Aud
Rx_Aud
Sub_Aud
C_Aud
Lr_Aud
Rr_Aud
Lf_Aud
Rf_Aud
Sub_VOL
C_VOL
Rr_VOL
Lr_VOL
Rf_VOL
Lf_VOL
Rx_VOL
Aud_I_Det
Aud_O_Det
~Vol_En
SPI_Out
SPI_Clk
M1_En
M2_En
~Sel_Rst
~Z2_Rly_En
~Z1_Rly_En
R143
1.5K
R144
1.5K
TAP_A_Out_R
V2B_L
V2B_R
V2_L
V2_R
Lt_Aud
Rt_Aud
Lx_Aud
Rx_Aud
Sub_Aud
C_Aud
Lr_Aud
Rr_Aud
Lf_Aud
Rf_Aud
Sub_VOL
C_VOL
Rr_VOL
Lr_VOL
Rf_VOL
Lf_VOL
Rx_VOL
Aud_I_Det
Aud_O_Det
~Vol_En
SPI_Out
SPI_Clk
M1_En
M2_En
~Sel_Rst
R153
1K
Q10
2N5087
MISC Z2 AUDIO SELECTOR
LC7821
U15
V2B_L V2B_R
Lt_Aud Rt_Aud
Z2_L_VOL Z2_R_VOL
Lr_Dmx
Lr_Out
Lr_W
C_Dmx
10
C_Out
11
C_W
12
M1_En
13
SPI_Out
14
SPI_Clk
15
~Sel_Rst
ZD7
1N963
R154
1K
R122
10K
C67
+
100uF/25V
1 2 3 4 5 6
L11R1
2
L2
3
L3
4
L4
5
LCM1
RCM1
6
L5
7
L6
8
LCM2
RCM2
9
L7
L8
LCM3
RCM3
VEE
VDD
CE
RST
DI
VSS16CLK
R95
47.5K
C55
.1uF
+15
R145
1.5K
Q9
2N5087
+15 -15
+15
W7
30
29
R2
28
R3
27
R4
26
25
R5
24
R6
23
22
R7
21
R8
20
19
18
17
S
R123
10K
W20
GND
MISC SUB AUDIO SELECTOR
Sub_G1 Rx_G1
V2_RV2_L
Sub_G2
Sub_G3
Sub_G4 Rx_G4
Sub_W Rx_W
Sub_Dmx
Rr_Dmx
Sub_Out
Rr_Out
Sub_Gain
Rr_W
10
11
12
+15-15
M2_En
13
SPI_Out
14
SPI_Clk
15
~Sel_Rst
Sub_W
Sub_G1
Sub_G2
Sub_G3
Sub_G4
Rx_W
Rx_G1
Rx_G2
Rx_G3
Rx_G4
Lx_Aud
Rx_Vol
Lf_Vol
Rf_Vol
C_Vol
Sub_Vol
Lr_Vol
Rr_Vol
A_Lf
A_Rf
Z2_A_Out_L
Z2_A_Out_R
C68
+
100uF/25V
-15
W9
U24
2
3
4
5
6
7
8
9
R121
47.5K
R120
47.5K
R114
47.5K
R113
47.5K
R112
47.5K
R115
47.5K
R116
47.5K
R117
47.5K
L11R1
L2
L3
L4
LCM1
L5
L6
LCM2
L7
L8
LCM3
VEE
CE
DI
ZD4
OPEN
ZD6
OPEN
R171
R167
R165
R163
R169
R172
R168
R166
R164
R170
R118
47.5K
R119
47.5K
16
1
LC7821
30
29
R2
28
R3
27
R4
26
RCM1
25
R5
24
R6
23
RCM2
22
R7
21
R8
20
RCM3
19
VDD
18
RST
17
S
VSS16CLK
ZD3
Z2_L_VOL
OPEN
ZD5
Z2_R_VOL
OPEN
17.4K
24.3K
7.5K
4.64K
2.49K
17.4K
24.3K
7.5K
4.64K
2.49K
PRE & POST AUDIO DETECTORS
U29A
LF353
3
2
ZD12
12V
5
6
LF353
U29B
ZD13
12V
+12
RL5
HAS212-12
143
98
5 12
VDD
C72
+
100uF/25V
Rx_G2
Rx_G3
Rx_Gain
Rx_W
Rx_Out
+15
84
Out_Det
-15
In_Det
+15-15
3
2
5
6
C87
.1uF
R98
5.62
Z2_R_VOL
Z2_L_VOL
SPI_D_1
SPI_Out
SPI_Clk
~Vol_En
~Vol_Mute
+15
C78
.1uF
84
U28A
LF353
S_Gain
C79
.1uF
-15
U28B
LF353
Rx_Gain
1
C86
.1uF
in place of R173
7
in place of R174
D4
LL4148
C65
100uF/25V
1
7
VDD
R107
10K
R110
10K
D1
LL4148
D2
LL4148
U13 CS3310
9
AIR
16
AIL
7
SDATAO
3
SDATAI
6
SCLK
2
CS
8
MUTE
1
ZCEN
ZONE 2 VOLUME
Q2
2N5210
+5
+
+5
W10
R108
10K
R111
10K
R38
1.5K
6
W22
W11
GND
RF
LF
SUB
CENTER
RR
LR
RX
LX
RF
W5
LF
V_C
V_RR
V_LR
V_RX
V_LX
A
D
W23
GND
W4
W25
GND
C
W1
W26
GND
W6
W27
GND
B
W31
W13
GND
W32
W14
GND
A
1 of 1
ESM
R24
221
R25
221
R31
221
R32
221
R34
221
R35
221
R141
221
R142
221
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