Block Diagram - Denon DRA-800H Service Manual

BLOCK DIAGRAM

ANALOG AUDIO DIAGRAM
VCC:D AB+ 3.3V
DAB
VCC:D A+ 5V
TUNER
FM/AM
32.768kH z
E3:BUFFER AMP
E2:GAIN AMP(+ 12.6dB)
AUDIO IN
PH ONO
CBL/SAT
CD
-7.0dB
ATT.
LEGO_ADC_L
ATT.
LEGO_ADC_R
TO D IGITAL DAC_FL
DAC_FR
AUD IO BLOCK
DAC_SW
-8.5dB
ATT.
AD INL
ATT.
AD INR
ZONE2_NET_LR
D NMIX_LR
DRA-800H ANALOG AUDIO BLOCK
V+ :+ 7.5V
V-:-7.5V
* LOGIC CONTROL H IGH LEVEL INPUT VOLTAGE(MIN: + 2.5V / MAX: V+ )
SELECT IC
NJU72750V
InA/B1 OUTA1
InA/B2 OUTA2
InA/B3
OUTA3
InA/B4
OUTB1
InA/B5
InA/B6 OUTB2
OUTB3
InA/B7
D A01
D A02
D A03
VOLUME IC
NJU72343V
MAIN_L
DAC_FL
D A01
MAIN_R
DAC_FR
D A02
DAC_SW
D A03
V+ :+ 7.5V
V-:-7.5V
GND
* LOGIC CONTROL H IGH LEVEL INPUT VOLTAGE(MIN: + 2.5V / MAX: V+ )
32
P-AMP
SPK OUT
SPEAKER A RELAY
+
FRONT A_L
-
+
FRONT A_R
-
SPEAKER B RELAY
+
FRONT B_L
-
+
FRONT B_R
-
H/P OUT
H/P L
GND
H /P R
H/P-AMP
OPEN
PRE OUT
SW 1
MUTE
SW 2
ZONE2_LCH
MUTE
ZONE2_RCH
MUTE