Onkyo TX-SR804 Service Manual page 56

A
SCHEMATIC DIAGRAM-13 (SD-13)
DIGITAL AUDIO WAVE FORM SECTION
NOTE:
1. WF01 is short for WaveForm01 .
1
2. Refer to SD-6(SCHEMATIC DIAGRAM-6) for details.
74HCU04F
Q212
COAX1
9 10
R377
COAX2
13 6
R372
IN 4 1
DIGITAL
VCC
OUT
GND
IN
R111
OPT1
VCC
WF01
2
GND
IN
R112
OPT2
VCC
GND
IN
R113
OPT3
VCC
GND
OPT1
WF01
3
Duty varies according to audio data
SAI_LRCK
WF04
20.8us
4
WF07 CX_LRCK
20.8us
AUDIO_FL
WF10
5
Analog audio wave form with aliasing noise
B
WF02
WF03
COAX1 47
DIR
COAX2 42
54 SAI_SDOUT
R381
61
L367
TX
50
60
R384
OPT1 45
WF04 WF05
OPT2
43
44
OPT3
Q361 CS42528-CQ
LR CLOCK (SAI_LRCK, CX_LRCK)
Fs=48kHz : DVD, Clock width=20.8us
Fs=44.1kHz : CD, Clock width=22.7us
WF02
4.0V
Duty always varies according to audio data
SAI_SLCK
WF05
3.3V
CX_SCLK
WF08
3.3V
AUDIO_FL
WF10
2.8V
0V
Aliasing noise in no audio data
CS494003
WF06
Q201
DSP
CX_SDIN1
107
R361
CX_SDIN2
106
R387
CX_SDIN3
109
R386
CX_SDIN4
110
R385
120
CX_SCLK
SAI_SLCK
111
139 L362
CX_LRCK
SAI_LRCK
117
141 R362
WF07
WF08
MASTER CLOCK=128Fs or 256Fs
BIT CLOCK (SAI_SLCK, CX_SLCK)
64Fs=3072kHz : DVD, Clock width=325ns
64Fs=2822.4kHz : CD, Clock width=354ns
COAX1
5.0V
3.3V
325 ns
3.3V
325 ns
220mVp-p
TX-SR804/804E
C
WF09
DAC_OUT-
DAC_OUT+
1
DAC 33
32
64
30
63
31
37
62
36
29
28
2
26
27
3
23
22
20
21
34
35
SAI_SDOUT
WF03
3.3V
Duty varies according to audio data
CX_SDIN1
WF06
3.3V
20.8us
DAC_OUT-
WF09
2.8V
0V
Analog audio wave form with aliasing noise
D
FL
WF10
Q400
AUDIO_FL
FR
Q400
C
Q401
SL
Q402
SR
Q402
SBL
Q403
SBR
Q403
SW
Q401