Harman Kardon HK 3700 Service Manual ▷ View online
Harman Kardon
HK 3700 Service Manual
Page 93 of 109
Harman Kardon
HK 3700 Service Manual
Page 94 of 109
R
M
II
US
B
B
UART
RJ-45
USB
I2C
APPLE
Auth iC
HK37xx Block Diagram
(USB + Network)
Ethernet
I2S Audio Output
To DSP / MCU
I2S Audio Output
USB 1.0
UART
USB
MUX
By up-grade
FS1230
(CHORUS3)
Harman Kardon
HK 3700 Service Manual
Page 95 of 109
HK37xx Block Diagram
(Audio + MCU)
NJW1112V
(8 in/4 out)
Source
Selector
Optical
x 2
Coaxial
x 1
CS42528
Codec
DAC
SUB Preout
AB_Class AMP (2ch) with Speaker A&B
H/P
To USB/Network
UART & GPIO
I2S I/F
UART
CS495314
DSP
PCM only
DAI 2/DAO1
SP
I
Main MCU
ST32F205
G
P
IO
I2S In/Out
SP
I
UART
GPIO
SP
I
SP
D
IF
Inp
ut
ut
Serial Flash
Memory
GPIO
SMPS
2x16
Dot
Matrix
Main MCU
Main MCU
V
F
D
C
o
n
tr
o
l
S
MPS
C
o
n
tr
o
l
V
o
lum
e
e
C
o
n
tr
o
l
T
u
n
e
r
C
o
n
tr
o
l
E
T
C
Mi
la
n
C
on
tr
o
l
DSP/CODEC Control
2
L
in
e
I2
S
1
L
in
e
I2
S
By Upgrade
USB ?
Main
MCU
MCU
A
na
lo
g Inp
ut
ut
&
M
M
ux
A
na
lo
lo
g O
ut
pu
t
t
DA0 2
4
L
in
e
I2
S
D
A
I1
Tuner Module
(AM/FM)
Analog
x 6
IR Input x 1
Trigger out x 1
Chorus3
(FS1230)
Analog
SW
NJM2753V
3in/1out
BT
Module
DAC
FL/FR
REC x 1
IR out x 1
Main
MCU
MCU
NJW1194V
2-ch
Volume&Tone
Control
Main
MCU
MCU
ADC
FL/FR
Harman Kardon
HK 3700 Service Manual
Page 96 of 109
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