30
VSX-
8
21-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Yes
Step 5: X'tal
IC1318 (pins 6, 7)
IC1324 (pin 17)
Is there a 24.576 MHz
output?
Check the IC1318 and its peripheral
circuits. or replace XTAL1300.
N
o
Yes
Is there a 24.576 MHz
input?
Check the IC1318 and its peripheral
circuits or replace XTAL1300.
N
o
XMCK
To Step 6
Yes
Step 6: DIR
IC1319 (pins 3, 5)
IC1318 (pins 61, 63)
IC1318 (pin 67)
IC1318 (pin 71)
Can observe the
digital signal?
Check the path to output pin of
JACK1305, JACK1306.
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital input lines.
N
o
Yes
Can observe the
digital signal?
Check the IC1319 and its peripheral
circuits or replace IC1319.
Can observe the
digital signal?
Can observe the
digital signal?
Yes
N
o
Check the path to pins 8 to 11 of
IC1319 or replace IC1319.
Check that it changes in the playback
and pause modes of the USB (iPod).
Yes
Check that the data and clock signals are output.
N
o
Check the path to CP1303 connector.
N
o
Check the USB Assy.
61: opt1
63: opt2
coax
from USB Assy
3: opt1
5: opt2
(0
V
↔
3.3
V
)
(0
V
↔
3.3
V
)
(0
V
↔
3.3
V
)
(0
V
↔
3.3
V
)
Summary of Contents for VSX-521-K
Page 13: ...13 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 17: ...17 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F D MAIN ASSY C AMP ASSY D MAIN ASSY E SUBWOOFER ASSY ...
Page 21: ...21 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 22: ...22 VSX 821 K 1 2 3 4 A B C D E F 1 2 3 4 4 5 D MAIN BLOCK DIAGRAM for VSX 921 K T D MAIN ASSY ...
Page 23: ...23 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 27: ...27 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F only P CPU ASSY Not used ...
