Harman Kardon AVR 370, Service Manual

Page: 162 / 182

AVR270/370 Block Diagram
(DSP Part)
NJU72340
Volume
Source
Selector
Optical In
X 2
Coaxial
In x 1
BD3812G
Zone2 Volume
CS42528
Codec
SD
IN
8CH Analog
8CH Analog
Analog In x 2
Analog Out x 1
SW Pre out 1
AB_Class AMP 7ch/ 7ch pre out(Only AVR370)
H/P & MIC
Zone2 Pre out x 1
Main MCU
Main MCU
To HDMI / BCO
UART & GPIO SPDIF & Analog Audio I2S I/F SPI & GPIO
CS497024
DSP
DAI 2
DAI 1
Tuner Module
(FM/AM)
SP
I
Main MCU
STM32F205ZFT6
GP
IO
IR Out & Trigger out
IR In X 1 /
Zone2 IR In
CS49DV8
Dolby
Volume
D
A
O 1
DAI 1
I2S Out
SP
I
SPI GPIO
D
A
O 1
SP
I
SP
DI
F Input
Fl
as
h
M
emo
ry
Fla
sh
M
emo
ry
16M
S
D
RA
M
GPIO
SMPS
2x16
Dot
Matrix
Main MCU
Main MCU
VF
D C
o
n
trol
SM
P
S
C
o
n
trol
V
o
lu
me
C
o
n
trol
T
u
n
e
r
C
o
n
trol
E
TC
B
CO
Co
nt
ro
l
H
D
M
I P
a
rt
C
o
m
m
u
n
ic
a
ti
o
n
DSP Controls
4 Line I2S
4
L
ine
I2
S
4
L
ine
I2
S
1
L
ine
I2
S
4 Line I2S
B
CO
A
nal
o
g
A
u
d
io
By Upgrade
USB ?
Main MCU
SPI
A
na
lo
g I
nput
&
Mu
x
A
na
lo
g O
ut
put
DA0 2
BD3812G (Only AVR370)
SW Pre out 2 Volume
SW Pre out 2 (Only AVR370)
Main MCU
RS-232
Control 4
U
A
RT
AZ4580
DSP
DOWNMIX
DSP DOWNMIX REC
DSP DOWNMIX
REC