Onkyo TX-SR875 Service Manual page 4

A B
BLOCK DIAGRAMS-1
AUX 2
AUDIO SECTION VIDEO IN
FM
ANTENNA
R L
TUNER UNIT
AM ANTENNA
1
XM
(DC Type Only)
Sirrus
L
CD
R
L
PHONO
RIAA
R
L
TAPE
R
L
TAPE OUT
R
2
L
AUX 1
R
L
GAME/TV
R
L
CBL/SAT
R
L
VCR/DVR OUT
R
L
VCR/DVR IN
3
R
L
DVD
R
FL
FR
C
SW
SL
SR
SBL
SBR
4
HDMI BOARD
NAHDM-9114
SD-15 to 19
IN 1-4 I2S (DVD audio,etc)
HDMI HDMI
SPDIF DSD
I/F
OUT
Q3001
TC74VHC157FT
OPTICAL IN 1
OPTICAL IN 2
DIGITAL IN
(FRONT)
OPTICAL OUT
5
COAX IN 1
COAX IN 2
COAX IN 3
<Note>
Refer to SCHEMATIC DIAGRAM-9 and -20 (SD-9 and SD-20)
for digital audio signal flow waveforms.
C
Analog Switch Array
Q4029
TC94A46CFG
SETUP MIC
1
2
3
ch2
MAIN A
NJU7312A
ch3 MAIN B
ch4
ch5
L R
ch6
Z2
ch7
ch8
Z3
ch9
Video REC
ch10
ch11
ch12
NJU7313A
Analog Switch
ch13
ch14
I2S
I2S/DSD
TC74VHC157FT
MULTIPLEXER
DSP BLOCK
SD-10, 11
1st DSP Q3401 TMS320D790E001BZDH275
or TMS320D710E001BZDH275
(SD-10)
FLASH ROM
2nd DSP Q3501 TMS320D788E001BRFP266
or TMS320D708E001BRFP266
(SD-11)
3rd DSP Q3601 TMS320D707E001BRFP250
SD_RAM (SD-11)
RX0
RX5
RX6
RX7
D E
Analog Switch Volume
Q4304 Q4405
NJU7312A CS3318
MAIN L
DAC FL
FL
MIX L
MAIN R
DAC FR
FR
MIX R
MCH C
DAC C
C
MCH SW
DAC SW
SW
+20dB
MCH SL
SL
DAC SL
MCH SR
SR
SBL
SBR
Q4306
NJU7311A
Analog Switch
.
0dB FIX
0dB FIX
TONE
0dB FIX
0dB FIX
TONE
Q4204 R2S15211FP
Audio Selector, Volume, Tone
I2S
Q3701 Q3721
PCM1796
PCM1796 PCM1796
DSD
DAC DAC
ADC
DIR
TC74VHC157FT MULTIPLEXER
Q3041
CS42516
F G
7 CH
POWER
AMPLIFIERS
HEADPHONES
1
2
3
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
ZONE2 PREOUT/LINEOUT
L
R
ZONE3 PREOUT/LINEOUT
L
R
NAVD-9052 SD-6
12V TRIGGER
CONTROL
IR
REMOTE
SENSOR
NADG-9074 SD-9
Q3741 Q3761
Q3781
PCM1796
PCM1796
RI
DAC
DAC INTERFACE
DAC
Q3031 ICL3221E
RS-232
TRANCEIVER
Q7001
M3087BFKBGP
MAIN MICROPROCESSOR
TX-SR875
H
SPEAKER TERMINALS
FRONT LEFT
FRONT RIGHT
CENTER
SURR LEFT
SURR RIGHT
SURR BACK
or Bi-AMP LEFT
SURR BACK
or Bi-AMP RIGHT
ZONE2 LEFT
ZONE2 RIGHT
PRE OUT
L
FRONT
R
CENTER
SUBWOOFER
L
SURR
R
L
SURR
BACK
R
12V TRIGGER
OUT ZONE 2
IR IN
IR OUT
RI
RS-232