Harman Kardon HK 980/230 - System Block Diagram

NJU7311AM
Source
Switch
NJU7311AM
Record
Switch
PHONO-in
TAPE-in
CDR-in
AUX-in
TUNER-in
TV-in
CD-in
I2C /CS
I2C /CS
VOL
WM8816
I2C /CS/MUTE
TONE
TONE Control(SPI)
Relay_1
R2_Ctrl
MCU
Headphone OUT
AMP X
Pre_ OUT
CDR/TAPE OUT CUT
NJU201AM
TAPE-OUT
CDR-OUT
CDR_CUT
TAPE_CUT
Interface
IR_IN
IR_OUT
mcu+5v
Rectifier
Rectifier
+15v
-15v
+5v
+12V
Rectifier
-30V
F1
F2
Relay_4
Relay_5
Rectifier
+48V
-48V
R2_Ctrl
R2_Ctrl
Speaker L1
Speaker L2
Amp L
Left Amplifier Board
Relay_6
Relay_7
Rectifier
+48V
-48V
R2_Ctrl
R2_Ctrl
Speaker L1
Speaker L2
Amp L
Right Amplifier Board
Main
Transformer
Rectifier
+14v
Standby
Transformer
Manostat
mcu+5v
Relay_8
Power on/off
Fuse Board
Main plug
Front Panel Board
H/P
H/P OUT
Master VOL
IR
VFD
Driver
74HC4094
KEY
Rx
F1 F2
-30V
Pre Amplifier(1 channel only) & MCU Board
HK980x
NJW1119A
+6dB
Op amp
Buffer
Op amp
TPA6120A
Buffer
phono amp
Relay_2
R1_Ctrl
Class A
Amplifier
Amplifier
Buffer
-6dB
Relay_3
harman/kardon
HK 980/230 Service Manual
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