Pioneer VSX-1018AH-K Service Manual page 59

5
Step 4: iPod authentication process
IC808 (Pins 18,19,20,21) SPI SIMO, SPI SOMI, SPI_UCLK, SPI_nSS (SPI communication with IC801)
13
Do the SPI_SIMO
No
and SPI_SOMI etc.
perform communication
?
Yes
IC808 (Pin 11)
14 CPRDY (Co-Processor Ready Signal)
No
Does the
CPRDY operate
?
The CPRDY performs communication once immediately after
the iPod is connected (when the authentication is started), and
performs the communication again when the authentication
operation is completed (approximately 70 seconds later).
Yes
Operation of IC808 is OK
To step 5
5
6
When the USB playback is available and only the iPod cannot be played
* Connect the iPod and make a confirmation.
When the power supply is turned ON or
function is switched to USB iPod, check
whether the communication waveform
can be observed on these lines.
Replace of IC808.
6
7
Is the CPRST
No
(38Pin) reset? After the
reset, is it set to
High (3.3V)
?
Yes
Does the
X881 oscillate
at 32.576kHz
?
Yes
To CPRDY
VSX-LX51
7
8
No
Check the pattern from
IC801.
No
Replace of IC808 and X881.
8
A
B
C
D
E
F
59