Pioneer Elite VSX-81TXV, Service Manual

Page: 207 / 272

VSX-2016AV-S
207
5 6 7 8
5 6
7
8
C
D
F
A
B
E
G
H
Replace IC651.
Yes
HBCK
IC651 (Pin 6)
No
Is there
a bit clock
input?
No
Is there
abnormality at the
parts and patterns
in the input path?
Step 4-4: When a sound is not out with the XM
Radio
To Step 5
Replace IC651.
Yes
HBCK
IC651 (Pin 6)
No
Is there
a bit clock
input?
No
Is there
abnormality at the
parts and patterns
in the input path?
To Step 5
Check the parts and patterns
in the path from the HDMI ASSY.
If there is not abnormality in the path
to the crystal, replace IC501 or ICX501.
IC501 (Pins 26,28) OSC
Insert the XM Antenna and check it.
No
Yes
Check the path to the microcomputer.
IC651 (Pin 1)
HDSW
Is the voltage
3.3 V?
No
Yes
Check the path to the microcomputer.
IC501 (Pin 9)
XMRST3
Is the
input signal
3.3 V?
No
Yes
Check the path to the microcomputer.
IC501 (Pins 3,5) XMDI3, XMDO3
Does
I/O signal operate
with 0 V to
3 V?
No
Yes
Check the path to the microcomputer.
IC501 (Pin 7) XMCS3
IC501 (Pins 18,19)
COMM_RX_P/M
Is the
input signal
0 V?
No
Yes
Check the path to the microcomputer.
IC601 (Pin 1) XMSW3
Is the
voltage
3.3 V?
No
Yes
Check the path to the microcomputer.
IC651 (Pin 1) HDSW
Is the
voltage
0 V?
No
Yes
Yes
HMCK
Replace IC651.
Replace IC651.
Replace IC651.
IC651 (Pin 10)
No
No
Is there
abnormality at the
parts and patterns
in the input path?
Yes
HLR
IC651 (Pin 13)
No
Is there
a LR clock
input?
No
Is there
abnormality at the
parts and patterns
in the input path?
Yes
HFDT
IC651 (Pin 3)
No
Is there
a audio data
input?
No
Is there
abnormality at the
parts and patterns
in the input path?
Step 4-3-2: When a sound is not out with the HDMI
(When the source is compression or
less than PCM48k)
IC301 (Pin 48) SPDIF
Can
observer the
digital signal
?
No
(0 V
⇔
3.3 V)
Yes
Is there
a master clock input
(24.576 MHz)?
Yes
(About 1.2 V center)
Abnormality in XM
Antenna or replace
IC501.
No
No
Is a
signal of CN501-
pins 2 and 3 unstable
at 200mVp-p level?
Is a
signal unstable at
200mVp-p level?
Does
crystal oscillate
about 2 to 3 Vp-p?
Yes
Check the parts and
patterns in the input path.
• : KUXJ and KUXJCA types only