Harman Kardon HK 3700, Service Manual

Page: 107 / 120

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
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
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
A
na
lo
g Inp
ut
&
M
ux
A
na
lo
g O
ut
pu
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
NJW1194V
2-ch
Volume&Tone
Control
Main
MCU
ADC
FL/FR
Harman Kardon HK 3770 Service Manual
Page 107 of 120