Pioneer VSX-1020-K Service Manual page 26

1
A
Step 3: X'tal
IC361 (Pins 1, 3, 5, 13)
Is there
No
a 24.576 MHz
input?
9
Yes
IC361 (Pins 2, 4, 6, 12)
Is there
No
B
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.
C
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.
D
OPT
R101, R102
Can
No
observe the
digital signal
?
(0 V ⇔ 4 V)
10
Yes
11
R122, R123 COAX
Can
No
observe the
E
digital signal
?
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 part
IC101 (Pin 5)
Can
No
observe the
F
digital signal
?
15 (0 V ⇔ 3.3 V)
Yes
26
1
2
Check the X362 (side B).
NG
Replace IC361.
Replace IC361.
Check the OPTICAL IN JACK,
and parts and patterns in the path.
Check the parts and patterns
in the path.
Check the HDMI part, and the parts
and patterns in the path.
2
3
Check that the data and clock signals are output.
IC101 (Pin 23) (or R110) DIRMCLK (Master clock)
Is there a
master clock
output?
(0 V ⇔ 3.3 V)
16
Yes
IC101 (Pin 24) (or R111) DIRLRCK (LR clock)
Is there
a LR clock
output?
(0 V ⇔ 3.3 V)
17
Yes
IC101 (Pin 25) (or R112) DIRADAT (Data)
Is there a
data output?
(0 V ⇔ 3.3 V)
18
Yes
IC101 (Pin 26) (or R113) DIRBCK (Bit clock)
Is there
a bit clock
output?
(0 V ⇔ 3.3 V)
19
Yes
To Step 5-3
VSX-1020-K
3
4
No
R117 XDIRRST
Is the
No
Check the path to
input signal
3.3 V?
the IC1305
(Port expander).
Yes
Replace IC101.
No
Replace IC101.
No
Replace IC101.
No
Replace IC101.
4
NG