A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
HTR-2064/NS-B20/NS-C20/NS-SWP20
80
DIGITAL 4/4
★
Components having special characteristics are marked
⚠
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
IC267
CB262
IC267
IC267
IC267
CB261
CB263
CB264
DIGITAL IN
DIGITAL IN
C/SW
FL/FR
FRONT L
CENTER
SURROUND L
SUBWOOFER
SL/SR
Microprocessor
I/F
Cbit, Pc
Fs calculator
IC261
: LC89058WD-E
Digital audio interface receiver
1
13
48
2
47
28
27
46
45
44
32
34
40 CL
CE
DI
DO
RERR
SDIN
RDATA
RMCK
RBCK
RLRCK
SBCK
SLRCK
XMODE
AUDIO
INT
CKST
MOUT
GPIO0
GPIO1
GPIO2
GPIO3
RXOUT2
RXOUT1
RX0
RX1
RX2
RX3
RX4
RX5
RX6
LPF
XIN
XOUT
XMCK
41
39
38
37
36
24
21
4
8
10
29
9
5
3
16
22
17
20
23
35
33
Input
Selector
PLL
Oscillation
Amplifier
Clock
Selector
Clock
Divider
Demodulation
and
Lock detect
Data
Selector
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
IN
L
V
IN
R
V
REF
1
V
REF
2
V
CC
AGND
PDWN
BYPAS
TEST
LRCK
MODE1
MODE0
FMT1
FMT0
OSR
SCKI
V
DD
DGND
DOUT
BCK
IC262
: PCM1803DBR
Stereo A/D converter
BCK
V
IN
L
Reference
V
REF
1
V
REF
2
V
IN
R
Delta-Sigma
Modulator
Delta-Sigma
Modulator
x 1/64, x 1/128
Decimation
Filter
With
High-Pass Filter
Power Supply
AGND
V
CC
V
DD
DGND
Clock and Timing Control
Serial
Interface
Mode/
Format
Control
LRCK
DOUT
FMT0
FMT1
MODE0
MODE1
BYPAS
OSR
PDWN
SCKI
TEST
IC263
: PCM1681PWPR
Audio digital-to-analog converter
Output Amp and
Low-Pass Filter
System Clock
Manager
Enhanced
Multilevel
Delta-Sigma
Modulator
DAC
Serial
Input
I/F
Function
Control
I/F
System Clock
Zero Detect
Power Supply
DAC
Output Amp and
DAC
DAC
Output Amp and
DAC
Output Amp and
DAC
Output Amp and
V
OUT
1
V
OUT
2
V
OUT
3
V
COM
V
OUT
4
V
OUT
ZR2
ZR1/ZR1/FMT0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MS/ADR/FMT1
MC/SCL/DEMP
MD/SDA/MUTE
SCK
DATA1
BCK
LRCK
DGND
DATA2
DATA3
DATA4
MSEL
VDD
AGND2
AGND1
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
VOUT8
VCC2
VCC1
VCOM
5
V
OUT
6
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Output Amp and
AGND2
V
CC
2
AGND1
V
CC
1
DGND
V
DD
ZR1/ZR1/FMT0
ZR2
BCK
LRCK
DATA1 (1, 2)
DATA2 (3, 4)
DATA3 (5, 6)
DATA4 (7, 8)
MS/ADR/FMT1
MC/SCL/DEMP
MD/SDA/MUTE
MSEL
SCK
8 x
Oversampling
Digital Filter
With
Function
Controller
DAC
Output Amp and
DAC
Output Amp and
V
OUT
7
V
OUT
8
Low-Pass Filter
Low-Pass Filter
IC264, 265
: BD9325FJ
2A output current integrated MOSFET step down regulator
IBIAS
ERR
FB
EN
BST
OUTPUT
VIN
SW
GND
OPEN
SHUTDOWN
COMP
SS
VREF
VREG
OSC
TSD
S
DRV
R
LOGIC
SLOPE
Soft Start
UVLO
VCC
5V
12V
7
5
PWM
OCP
LVS
LVS
6
8
4
3
2
1
V
OUT
GND
V
IN
CONTROL
IC266
: NJM2830U1-05 (TE1)
Low dropout voltage regulator
Bandgap
Reference
Thermal
Protection
5
4
1
2
V
OUT
V
IN
Control
GND
1
4
5
2
IC268
: NJM2867F3-05
Low dropout voltage regulator
Bandgap
Reference
Thermal
Protection
to DIGITAL 1/4
to DIGITAL 3/4
to DIGITAL 2/4
to DIGITAL 3/4
to DIGITAL 2/4
to DIGITAL 2/4
to DIGITAL 2/4
to DIGITAL 2/4
ADC
DAC