Onkyo HTR-550 Service Manual page 27

A
SCHEMATIC DIAGRAMS-10
DIGITAL AUDIO WAVE FORM SECTION
<Note>
1. WF01 is short for Wave form 01 .
1
2. TP01 is test point number on PC board.
3. Refer to SD-3 (SCHEMATIC DIAGRAM-3) for details.
LR CLOCK (SAI_LRCK, CX_LRCK)
Fs = 48kHz : DVD, Clock width = 20.8us
Fs = 44.1kHz : CD, Clock width = 22.7us
WF01 OPT1
2
Duty varies according to audio data
WF04 SAI_LRCK
TP02
3
20.8us
WF07 CX_LRCK
TP05
4
20.8us
WF10 AUDIO_FL
TP08 --- TP15
5
Analog audio wave form with aliasing noise
B
BIT CLOCK (SAI_SLCK, CX_SLCK)
64Fs = 3072kHz : DVD, Clock width = 325ns
64Fs = 2822.4kHz : CD, Clock width = 354ns
WF02 COAX1
4.0V
Duty always varies according to audio data
WF05 SAI_SLCK
TP01
3.3V
325 ns
WF08 CX_SCLK
TP04
3.3V
325 ns
WF10 AUDIO_FL
2.8V
0V
Aliasing noise in no audio data
C
WF03 SAI_SDOUT
TP03
5.0V
Duty varies according to audio data
WF06 CX_SDIN1
TP06
3.3V
20.8us
WF09 DAC_OUT-
3.3V
Analog audio wave form with aliasing noise
220mVp-p
HT-R550
D
3.3V
3.3V
2.8V
0V