Pioneer VSX-821-K Service Manual page 42

1
A
Step 3: Operation of iPod (Authentication process)
IC804 (pins 12, 13)
Do scl and sda
communicate?
Yes
B
Operation of IC804 is OK.
Go to step 4.
Step 4: Audio out check
CN802 (pin 1)
Is there a S/PDIF signal?
C
Yes
Refer to
"[1] DSP TROUBLESHOOTING."
D
E
F
42
1
2
scl, sda (I2C between IC801 and IC804)
When scl and sda are normal operation = high (3.3 V) connect iPod,
No
and communicate it about 10 seconds later (authentication starts).
And communicate it about 60 seconds later (authentication is complete).
Does reset_auth
(pin 4) reset it?
High after the reset.
Replace IC804.
S/PDIF output
No
Check the path between
IC801 (pin 105).
OK
Check the parts and pattern
CN802 and IC801.
VSX-821-K
2
3
No
Check the path between
IC801 (pin 120).
Yes
NG
Replace IC801.
3
4
4