TX-NR900/E
BLOCK DIAGRAM
LEFT
LEFT
L
R
C
SW
SL
SR
SBL
SBR
FRONT SPEAKERS
LEFT
AC
OUTLET
FUSE
RS 232
RIGHT
LEFT
SUBWOOFER
COOLING FAN
+5 V
VIDEO
-5 V
VIDEO
+9 V
VIDEO
RELAY
DRIVER
MAIN AMP
+B1/ -B1
-27V
-VP
FL AC
FL TUBE
FL AC
CONTROL
12V TRIGGER
+B 3
RELAY
+B 2
-15V
AUDIO
+5 V
DS P
+15V
AUDIO
MUTE
MUTE
MUTE
MUTE
RELAY
DRI VER
MUTE
VOLTAGE/CUR-
RENT SENSOR
MUTE
MUTE
MUTE
THER MAL
SENSOR
FAN
DRIVER
RI
INTERFACE
+5.6V
Y
CB
CR
REMOTE SENSOR
ZONE 2
I R OUT
I RIN
RI
T902
T901
AC IN
TONE
NJU7306G
NJU7306G
-1
-1
ED
DRIVER
TC94A07F
TC94A07F
TC94A07F
MASTER VOLU ME
TC94A07F
CUT
BOOST
Z2L
MCL
BL
TL
DL
BR
TR
MC R
DR
Z2R
DSBL
MCSR
MCSBL
DSW
MCSW
DC
MC C
DSBR
MCSBR
DSR
DSL
MCSL
SW->R
SW->L
BYPASS
C->L
SL->L
C->R
SR->R
TV-8
HPEN
TC9163
TC9164
+29dB
Power Amplifier
+29dB
11dB
11dB
+29dB
+29dB
+29dB
+29dB
+29dB
HEADPHONE
SURROUND SPEAKERS
SURROUND BACK SPEAKERS
/ZONE 2 SPEAKERS
RIGHT
RIGHT
RIGHT
CENTER
PREOUT
SURROUND
LEFT
SURROUND
RIGHT
SURROUND BACK
/ZONE 2 LEFT
SURROUND BACK
/ZONE 2 RIGHT
CENTER
MUTE
MUTE
BYPASS
MULTI CHANNEL INPUT
COMPONENT VIDEO OUTPUT
IR DE-
MODULATOR
BYPASS
BYPASS
STANDBY
Rec Out LED
Zone 2 LED
RS232
INTERFACE
MPD4721GS
120V model
Other models
POWER SW
TV-5
Except 120V and
Australian models
FUSE
Except 120V model
A
1
2
3
4
5
B
C
D
