Waveform Section - Onkyo TX-SR876 Service Manual

A B
SCHEMATIC DIAGRAM-21(SD-21)

WAVEFORM SECTION

Digital Audio Waveform Part
1
NOTE:
1. WF01 is short for Waveform01 .
2. Refer to SD-9(SCHEMATIC DIAGRAM-9)
for the location of each waveform on circuit.
3. SD-x:XY is short for Shcematic Diagram-x and
each socket's location, X=A to H, Y=1 to 5.
WF02
WF01 OPT1 (SD-9:B2)
2
4.0V
Duty varies according to audio data
WF04 (SD-9:C4) WF05
SAI_LRCK
3.3V
3
20.8us
WF08
WF07 LRCK4 (SD-9:D4)
3.3V
4
20.8us
(SD-9:G3)
WF10 DACFL
WF10 DACFL
2.8V
0V
Aliasing noise in no audio data
Analog audio waveform with aliasing noise
5
C
LR CLOCK (SAI_LRCK, LRCK_DIR)
Fs=48kHz : DVD, Clock width=20.8us
Fs=44.1kHz : CD, Clock width=22.7us
BIT CLOCK (SAI_SLCK, BCK_DIR)
64Fs=3072kHz : DVD, Clock width=325ns
64Fs=2822.4kHz : CD, Clock width=354ns
COAX1 (SD-9:C2) SAI_SDOUT (SD-9:B4)
WF03
5.0V
3.3V
Duty always varies according to audio data Duty varies according to audio data
WF06 (SD-9:D4)
SAI_SLCK (SD-9:C4) DIGSDO
3.3V
325 ns
20.8us
DIGCLK (SD-9:D4) WF09 (SD-9:E4)
OUTL-
2.8V
3.3V
0V
Analog audio waveform with aliasing noise
325 ns
(SD-9:G3)
220mVp-p
D E
Video source color and pattern
White Cyan Magenta Blue
Yellow Green Red
NOTE:
1. WF21 is short for Waveform21 .
2. Refer to SD-6(SCHEMATIC DIAGRAM-6)
for the location of each waveform on circuit.
3. SD-x:XY is short for Shcematic Diagram-x and
each socket's location, X=A to H, Y=1 to 5.
4. In the case that video outputs are not
connected to video devices, video signal
output levels are doubled.
HDMI Waveform Part
3.3V
HDMI D0,D1,D2 waveform
SD-17:B5 / SD-18:4G
WF41
360mV
2,227.5MHz
(1080p,12bit)
600mV
27MHz
(480i, 8bit)
D0,D1,D2 Eye-pattern waveform, frequency and
level vary according to video resolution, aspect
and profile. Waveforms above are examples.
HDMI CK waveform
SD-17:B4 / SD-18:4G
WF42
222,75MHz
(1080p,12bit)
CK waveform, frequency and level differ according to
video resolution, aspect and profile.
D0,D1,D2 are just CK x10.
F G
Video Waveform Part
Composite waveform S-Video Y waveform
WF21 SD-6:B5 WF22 SD-6:B5
1V 1V
6.36 s u
(NTSC)
1.2 Vp-p (H)
1.0 Vp-p
Component Y waveform Component PB waveform
WF24 SD-6:B2,B3 WF25 SD-6:B2,B3
1V
1.0 Vp-p
720 mVp-p
FL Driver IC Control Waveform Part
SCK/SDATA waveform
WF61 SD-13:D2, F2
5V
5V
SCK SCK
0V 0V
2ms
12ms
5V
5V
SDATA SDATA
0V 0V
_CS waveform
WF62 SD-13:D2, F2
5V
SCK
0V
2ms
12ms
5V
CS
0V
_RESET waveform
WF63 SD-13:D2, F2
5V 5V
SCK SCK
0V 0V
0.45s
5V 5V
RESET RESET
0V 0V
When power on
TX-SR876/SA876
H
S-Video C waveform
WF23 SD-6:B4,B5
280 mVp-p
Component PR waveform
WF26 SD-6:B2
728 mVp-p
SCK/SDATA waveform
WF61 SD-13:D2, F2
10 s u
SDATA waveform varies according to
the data content
_RESET waveform
WF63 SD-13:D2, F2
0.6s
When power off