Pioneer VSX-821-K Service Manual page 30

1
A
Step 5: X'tal
IC1318 (pins 6, 7)
Is there a 24.576 MHz
output?
Yes
IC1324 (pin 17)
Is there a 24.576 MHz
B
input?
Yes
To Step 6
Step 6: DIR
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital input lines.
IC1319 (pins 3, 5)
C
Can observe the
digital signal?
Yes
IC1318 (pins 61, 63)
Can observe the
digital signal?
Yes
IC1318 (pin 67)
D
Can observe the
digital signal?
Yes
Check that it changes in the playback
and pause modes of the USB (iPod).
IC1318 (pin 71)
Can observe the
E
digital signal?
Yes
Check that the data and clock signals are output.
F
30
1
2
No
Check the IC1318 and its peripheral
circuits. or replace XTAL1300.
XMCK
No
Check the IC1318 and its peripheral
circuits or replace XTAL1300.
3: opt1
5: opt2
No
Check the path to output pin of
JACK1305, JACK1306.
(0 V ↔ 3.3 V)
61: opt1
63: opt2
No
Check the IC1319 and its peripheral
circuits or replace IC1319.
(0 V ↔ 3.3 V)
coax
No
Check the path to pins 8 to 11 of
IC1319 or replace IC1319.
(0 V ↔ 3.3 V)
from USB Assy
No
Check the path to CP1303 connector.
(0 V ↔ 3.3 V)
2
3
Check the USB Assy.
VSX-821-K
3
4
4