Pioneer SX-LX70SW Service Manual page 30

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A
Step 4: Audio Clock (Until Switch)
• When a sound is not out with the digital (OPT IN)
signal input.
• When a sound is not out with the analog signal input.
• When a sound is not out with the HDMI. (It is assumed
that failure diagnosis of HDMI Assy has been completed.)
(I2S path)
When the source is "dts HD Master Audio", "Dolby True
HD", "PCM or LPCM at or above the sampling rate of
88.2kHz" or "LPCM Multi ch". → Go to Step 4-3-1
B (S/PDIF path)
When the source is "dts HD High Resolution Audio", "dts
HD LBR", "Dolby Digital Plus", "2ch at or below the
sampling rate of 48kHz), or "other compression streams".
(DSD)
When the source is SACD. → Go to Step 4-3-2
Step 4-1: When a sound is not out with the digital
(OPT IN) signal input
When the source in the digital (OPT IN) or the HDMI
C
path is "dts HD High Resolution Audio", "dts HD LBR",
"Dolby Digital Plus", "2ch at or below the sampling
rate of 48kHz" or "other compression streams".
Check that changes by pulling out and inserting the
digital input lines.
TE
L 13942296513
OPT IN (2 inputs)
IC301 (Pins 1,3)
Can
No
Check the parts and patterns in the
observe digital
path from the OPT IN terminal.
signal?
D
(0 V ⇔ 4 V)
Yes
HDMI S/PDIF IN
IC301 (Pin 48)
Can
No
Check the parts and patterns
observe digital
in the path from the HDMI Assy.
signal?
(0 V ⇔ 3.3 V)
Yes
Input a digital signal and check with
E
the state which selected the function.
IC651 (Pin 1) HDSW
No
Check the path to the
Is the voltage
microcomputer.
0 V?
www
Yes
F
30
1
http://www.xiaoyu163.com
2
→ Go to Step 4-1
→ Go to Step 4-2
→ Go to Step 4-1
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SX-LX70SW
2
http://www.xiaoyu163.com
3
8
IC301 (Pin 23) DIRM
Is there
No
a master clock
output
(24.576 MHz)?
Yes
IC651 (Pin 11)
Is there
No
a master clock
input
(24.576 MHz)?
Yes
IC301 (Pin 24)
DIRL
Q Q
Is there 3 6 7 1 3
No
a LR clock
output?
Yes
IC651 (Pin 14)
Is there
No
a LR clock
input?
Yes
IC301 (Pin 25)
DIRD
Is there
No
a audio data
output?
Yes
IC651 (Pin 2)
Is there
No
a audio data
input?
Yes
u163
C
.
3
4
2 9 9 4 2 8
Is the
No
voltage of
IC301-pin 31
3.3 V?
Check the path to the
Yes
microcomputer.
Is the output of
No
IC301-pin 36
(DRERR3 )
0 V?
Replace IC301
or IC651.
Is there
No
abnormality at the
parts and patterns
in the input path?
Replace IC301
or IC651.
Is there
1 5 0 5 8 2 9 9 4
No
abnormality at the
parts and patterns
in the output path?
Replace IC301
or IC651.
Is there
No
abnormality at the
parts and patterns
in the input path?
Replace IC301
or IC651.
Is there
No
abnormality at the
parts and patterns
in the output path?
Replace IC301
or IC651.
Is there
No
abnormality at the
parts and patterns
in the input path?
Replace IC301
m
or IC651.
co
4
9 9
2 8 9 9