Pioneer VSX-1022-K Service Manual page 42

1
A [3] iPod TROUBLESHOOTING
Step 0: iPod/USB Power supply
CN9202 (pins 2, 3)
Are there any digital data
signals?
Yes
To Step 1
B
C
Step 2: Operation of iPod (Authentication process)
IC9204 (pins A1, B1)
Do D+ and D-
communicate?
Yes
IC9206 (pins 12, 13)
D
Do SCL and SDA
communicate?
Yes
Operation of IC9206 is OK.
To Step 3.
E
Step 3: Audio out check
IC9204 (pin U3)
Is there a signal?
Yes
Refer to Step 7 of
"[1] DSP TROUBLESHOOTING."
F
42
1
2
No
Check the wire between D-MAIN
Assy and F-USB Assemblies.
USB data D+, D-
No
Check the USB data line.
SCL_AP, SDA_AP
(I2C between IC9204 and IC9206)
When SCL and SDA are normal operation = high (3.3 V)
No
Connect iPod, and communicate it about 10 seconds later (authentication starts).
And communicate it about 60 seconds later (authentication is complete).
No
Does XAPRST (pin 4)
reset it?
High after the reset.
Yes
Replace the D-MAIN Assy.
NETSPDIF
No
Replace the D-MAIN Assy.
VSX-1022-K
2
3
Step 1: Diagnosis
CN9201 (pin 6)
Is pin 6 (USBDDCERR)
of CN9201 low?
Yes
CN9201 (pin 4)
Is pin 4 (XUSBERR)
of CN9201 low?
Yes
CN9201 (pin 5)
Is pin 5 (USBPOW)
of CN9201 high?
Yes
To Step 2
No
Check the path between
IC9024 (pin J2).
3
4
No
Check the F-USB Assy.
No
Check the F-USB Assy.
No
Check the path between
IC9204 (pin K2).
4