Pioneer VSX-03TXH Service Manual page 30

1
QQ
3 7 63 1515 0
A
Step 4: 3 V to 5 V conversion
IC702
Do
No
convert 3 V into
5 V for input?
Yes
IC703
B
Do
No
convert 3 V into
5 V for input?
Yes
To Step 5
Step 5: 5 V to 3 V conversion
IC701
C
Do
No
convert 5 V into
3 V for input?
Yes
TE
L 13942296513
To Step 6
Step 6: X'tal
IC503 (Pin 6)
D
Is there
No
a 24.576 MHz
output?
Yes
IC503 (Pin 12)
Is there
No
a 24.576 MHz
output?
Yes
E
IC503 (Pin 10)
Is there
No
a 24.576 MHz
output?
Yes
IC503 (Pin 8)
www
Is there
No
a 24.576 MHz
output?
F
Yes
To Step 7
30
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2
Replace IC702.
Replace IC703.
Replace IC701.
Replace IC503 or X531.
Check the pattern to pin 10 of IC851.
Replace IC851.
Check the pattern to pin 80 of IC401.
Replace IC401.
x ao
y
Check the pattern to pin 30 of IC101.
Replace IC101.
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2
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3
8
Step 7
When the COAX or OPT is input, go to Step 7-1.
When the USB is input, go to Step 7-2.
When the HDMI (SPDIF line) is input, go to Step 7-1.
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 (I2S line) is input, go to Step 7-3.
Used Source
[dts HD Master Audio], [Dolby True HD],
[PCM or LPCM of 88.2kHz sampling rate or more],
[LPCM Multi ch]
When the HDMI (SACD) is input, go to Step 7-5.
Used Source [SACD]
Step 7-1-1: DIR
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the
digital input lines.
IC101 (Pins 1, 3, 5 (VSX-03TXH only)) OPTICAL
Can
observe the
digital signal
?
(0 V ⇔ 4 V)
Yes
IC101 (Pin 7)
Q Q
3 6 7
Can
observe the
digital signal
?
(0 V ⇔ 4 V)
Yes
IC101 (Pins 42, 44) COAX
Can
observe the
digital signal
?
(1.65 V center, amplitude more than 0.2 Vp-p)
Yes
Check that it changes in the Playback and Pause modes of
the HDMI.
IC101 (Pin 48)
Can
observe the
digital signal
?
(0 V ⇔ 3.3 V)
Yes
A
u163
VSX-03TXH
3
4
2 9 9 4
No Check the OPTICAL IN JACK,
and parts and patterns in the path.
FRONT OPTICAL
1 3 1 5 0 5 8 2 9
No
Check the FRONT IN ASSY, and
parts and patterns in the path.
No
Check the parts and patterns
in the path.
From HDMI ASSY
No
Check the HDMI ASSY, and the parts
and patterns in the path.
m
co
.
4
2 8
9 9
9 4 2 8 9 9