Pioneer VSX-LX52 Service Manual page 29

5
Step 3: X'tal
IC361 (Pins 1, 3, 5, 13)
Is there
No
Check the X362 (side B).
a 24.576 MHz
input?
9
Yes
IC361 (Pins 2, 4, 6, 12)
Is there
No
Replace IC361.
a 24.576 MHz
output?
9
Yes
To Step 4
• When the COAX or OPT is input, go to Step 4.
• When 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 48kHz sampling rate or less],
[Other compression stream]
• When the HDMI (SACD) is input, go to Step 5-1.
Used Source: [SACD]
• When 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]
• When the USB is input, go to Step 5-3.
Step 4: DIR
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital
input lines.
OPT
R101, R103
Can
Check the OPTICAL IN JACK,
No
observe the
and parts and patterns in the path.
digital signal
?
(0 V ⇔ 4 V)
10
Yes
12
R122, R123 COAX
Can
No
Check the parts and patterns
observe the
digital signal in the path.
?
13
(1.65 V center, amplitude more than 0.2 Vp-p)
Yes
14
Step 4-1
Check that it changes in the Playback and Pause modes of
the HDMI.
From HDMI block
IC101 (Pin 5)
Can
No
Check the HDMI block, and the parts
observe the
digital signal
and patterns in the path.
?
15 (0 V ⇔ 3.3 V)
Yes
5
6
NG
Replace IC361.
VSX-LX52
6
7
Check that the data and clock signals are output.
IC101 (Pin 23) (or R110) DIRMCLK (Master clock)
Is there a
No
master clock
output?
(0 V ⇔ 3.3 V)
16
Yes R117
Is the
input signal
3.3 V?
Yes
IC101 (Pin 24) (or R111) DIRLRCK (LR clock)
Is there
No
a LR clock Replace IC101.
output?
(0 V ⇔ 3.3 V)
17
Yes
IC101 (Pin 25) (or R112) DIRADAT (Data)
No
Is there a
Replace IC101.
data output?
(0 V ⇔ 3.3 V)
18
Yes
IC101 (Pin 26) (or R113) DIRBCK (Bit clock)
Is there
No
Replace IC101.
a bit clock
output?
(0 V ⇔ 3.3 V)
19
Yes
To Step 5-3
7
8
XDIRRST
No
Check the path to
the IC1305
(Port expander).
NG
Replace IC101.
29
8
A
B
C
D
E
F