Onkyo HT-R540 Service Manual page 30

A
SCHEMATIC DIAGRAMS-9
DIGITAL AUDIO WAVE FORM SECTION
NOTE:
1. WF01 is short for WaveForm01 .
2. See SD-6(SCHEMATIC DIAGRAM-6) for details
1
74HCU04F
Q131
COAX1
13 10
COAX
R336
IN
R141
OPT1
WF01
2
IN
R142
OPT2
IN
R143
OPT3
OPT1
WF01
3
Duty varies according to audio data
WF04 SAI_LRCK
20.8us
4
WF07 CX_LRCK
20.8us
AUDIO_FL
WF10
5
Analog audio wave form with aliasing noise
B
WF02
WF03
43
DIR
54 SAI_SDOUT
R312
SAI_SLCK
61
R316
60 SAI_LRCK
R315
OPT1 46
WF04 WF05
OPT2
45
48
OPT3
Q301 CS42518-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
WF05
3.3V
WF08
3.3V
WF10
2.8V
0V
Aliasing noise in no audio data
C
Q201
WF06
TMS320D707E001
CX_SDIN1
DSP
113
R254
CX_SDIN2
115
CX_SDIN3 R255
116
CX_SDIN4 R256
117
120 R257
CX_SCLK
142
139
R267
CX_LRCK
144
141
R269
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
SAI_SLCK
3.3V
325 ns
CX_SCLK
3.3V
325 ns
AUDIO_FL
220mVp-p
WF09
R411
DAC_OUT-
DAC_OUT+
R401
R412
1
DAC 33
32 R402
64
30
R413
63
31
37
62
R403
36
29
28
2
R415
26
27
3 R405
23
22
20
R416
21
34
R406
35
R417
R407
R418
R408
R414
R404
SAI_SDOUT
WF03
3.3V
Duty varies according to audio data
WF06 CX_SDIN1
3.3V
20.8us
WF09 DAC_OUT-
2.8V
0V
Analog audio wave form with aliasing noise
HT-R540
D
FL
WF10
Q401
AUDIO_FL
FR
Q401
C
Q402
SL
Q403
SR
Q403
SBL
Q404
SBR
Q404
SW
Q402