Pioneer VSX-1016V-K Service Manual page 202

1
A
Troubleshooting in the XM mode (AWX8699 only)
• When a sound is not output in the XM antenna input.
• Suppose CR to be poor contact and that is not damaged.
• This shows failure analysis of DSP Assy.
Step 0: Preliminary confirmation
Confirm the following items before checking
Do screws
B
of COAX Jack
securely tighten
?
Yes
To Step 1
Step 1: MUTE pin
IC801 (Pin 54)
C
Is the
voltage of output
signal 0 V
?
No
To Step 2
Step 2: BtoB connector and FFC
CN901, CN701, CN951
D
Are the
connectors securely
inserted?
Yes
CN952
Is the
FFC securely
inserted?
E
Yes
To Step 3
Step 3: Regulator IC
IC901 (Pin 1)
Is the
voltage of around
5 V to 5.3 V
input?
F
Yes
202
1
2
No
Tighten screws securely.
MUTE
Yes
Replace IC801.
BtoB connector
No
Turn the power off and
insert the connectors
securely.
FFC
No
Turn the power off and
insert the connectors
securely.
(to chassis)
No
Check the CN901 and
Regulator assy.
VSX-1016V-K
2
3
IC901 (Pin 3)
(to chassis)
Is the
No
voltage of 3.3 V
Replace IC901.
output?
Yes
IC902 (Pin 2)
(to chassis)
Is the
No
voltage of 1.25 V Replace IC902.
output?
Yes
IC402 (Pin 1)
(to chassis)
Is the
No
voltage of around
5 V to 5.3 V
input?
Yes
To Step 4
Step 4: 3 V to 5 V conversion
IC952 (Pin 3)
Do
No
convert 3 V into
Replace IC952.
5 V for pin 17
input?
Yes
IC952 (Pin 5)
Do
No
convert 3 V into
Replace IC952.
5 V for pin 15
input?
Yes
A
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4
Part shape and Pin arrangement
of IC901 and IC902
Is the
voltage of IC402-
No
pin 5 around 5 V to
5.3 V input?
Check the power
supply path.
Yes
Is the
voltage of IC402-
No
pin 4 more than
2.4 V?
Check the path to
Yes
the microcomputer.
Replace IC402.
4