Pioneer VSX-1022-K, Service Manual

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42
VSX-1022-K
1 2 3 4
A
B
C
D
E
F
1 2 3 4
[3] iPod TROUBLESHOOTING
Step 1: Diagnosis
Step 0: iPod/USB Power supply
C N 9202 (pins 2, 3)
Are there any digital data
signals?
Check the wire between D-MAI N
Assy and F-USB Assemblies.
N o
Check the F-USB Assy.
Check the USB data line.
N o
N o
N o
Check the path between
IC9024 (pin J2).
N o
To Step 1
To Step 2
C N 9201 (pin 6)
C N 9201 (pin 4)
Is pin 6 (USBDDCERR)
of C N 9201 low?
Yes Yes
Yes
Yes
Yes
Yes
Replace the D-MAI N Assy.
N o
Check the F-USB Assy.
Is pin 4 (XUSBERR)
of C N 9201 low?
Yes
N o
C N 9201 (pin 5)
Check the path between
IC9204 (pin K2).
Is pin 5 (USBPO W )
of C N 9201 high?
Yes
N o
W hen 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).
Step 2: Operation of iPod (Authentication process)
IC9204 (pins A1, B1)
IC9206 (pins 12, 13)
USB data D+, D-
SCL_AP, SDA_AP
(I2C between IC9204 and IC9206)
Do D+ and D-
communicate?
Do SCL and SDA
communicate?
Does XAPRST (pin 4)
reset it?
High after the reset.
Operation of IC9206 is OK.
To Step 3.
Refer to Step 7 of
"[1] DSP TROUBLESHOOTI
N G."
Replace the D-MAI N Assy.
Step 3: Audio out check
IC9204 (pin U3)
Is there a signal?
N o
N ETSPDIF