Pioneer VSX-521-K, Service Manual

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42
VSX- 8 21-K
1 2 3 4
A
B
C
D
E
F
1 2 3 4
Yes
Yes
OK
Check the path between
IC801 (pin 120).
Replace IC804.
Operation of IC804 is OK.
Go to step 4.
Step 3: Operation of iPod (Authentication process)
IC804 (pins 12, 13)
Do scl and sda
communicate?
Does reset_auth
(pin 4) reset it?
High after the reset.
N o
N o
When scl and sda are normal operation = high (3.3 V ) connect iPod,
and communicate it about 10 seconds later (authentication starts).
And communicate it about 60 seconds later (authentication is complete).
scl, sda (I2C between IC801 and IC804)
Yes
Refer to
"[1] DSP TROUBLESHOOTI
N G."
Check the path between
IC801 (pin 105).
Check the parts and pattern
C
N 802 and IC801.
Replace IC801.
Step 4: Audio out check
C N 802 (pin 1)
Is there a S/PDIF signal?
N o N G
S/PDIF output