29
VSX-LX52
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 4: DIR
Step 4-1
Check the parts and patterns
in the path.
Check the HDMI block, and the parts
and patterns in the path.
Check the OPTICAL I
N
JACK,
and parts and patterns in the path.
Check the path to
the IC1305
(Port expander).
R101, R103
OPT
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital
input lines.
Can
observe the
digital signal
?
N
o
(0
V
⇔
4
V
)
Yes
R122, R123
COAX
Can
observe the
digital signal
?
N
o
Yes
Yes
Check that it changes in the Playback and Pause modes of
the HDMI.
(0
V
⇔
3.3
V
)
IC101 (Pin 5)
From HDMI block
Can
observe the
digital signal
?
N
o
(1.65
V
center, amplitude more than 0.2
V
p-p)
Step 3: X'tal
To Step 4
Check the X362 (side B).
Replace IC361.
Replace IC361.
Yes
IC361 (Pins 1, 3, 5, 13)
IC361 (Pins 2, 4, 6, 12)
N
o
N
G
Is there
a 24.576 MHz
input?
N
o
Is there
a 24.576 MHz
output?
Yes
Replace IC101.
Yes
N
o
Is there
a bit clock
output?
(0
V
⇔
3.3
V
)
To Step 5-3
Replace IC101.
(0
V
⇔
3.3
V
)
Yes
N
o
Is there
a LR clock
output?
Replace IC101.
Yes
R117
XDIRRST
N
o
N
G
Is the
input signal
3.3
V
?
Replace IC101.
(0
V
⇔
3.3
V
)
Yes
N
o
Is there a
data output?
(0
V
⇔
3.3
V
)
IC101 (Pin 23) (or R110) DIRMCLK (Master clock)
IC101 (Pin 24) (or R111) DIRLRCK (LR clock)
IC101 (Pin 25) (or R112) DIRADAT (Data)
IC101 (Pin 26) (or R113) DIRBCK (Bit clock)
N
o
Yes
Is there a
master clock
output?
Check that the data and clock signals are output.
•
W
hen the COAX or OPT is input, go to Step 4.
•
W
hen the HDMI (SPDIF path) is input, go to Step 4-1.
Used Source:
[dts HD High Resolution Audio], [dts HD LBR],
[Dolby Digital Plus], [2ch of 4
8
kHz sampling rate or less],
[Other compression stream]
•
W
hen the HDMI (SACD) is input, go to Step 5-1.
Used Source: [SACD]
•
W
hen the HDMI (I2S path) is input, go to Step 5-2.
Used Source:
[dts HD Master Audio], [Dolby True HD],
[PCM or LPCM of
88
.2kHz sampling rate or more],
[LPCM Multi ch]
•
W
hen the USB is input, go to Step 5-3.
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