Pioneer VSX-1016V-K Service Manual page 205

5
Troubleshooting in the MCACC mode (AWX8572 and AWX8699 only)
• When the MCACC mode is turned on (SurroundBack is not output by setting.)
• 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
of COAX Jack
securely tighten
?
Yes
To Step 1
Step 1: MUTE pin
IC801 (Pin 54)
Is the
voltage of output
signal 0 V
?
Yes
To Step 2
Step 2: BtoB connector
CN901, CN701, CN952
Are the
connectors securely
inserted?
Yes
To Step 3
Step 3: Regulator IC
IC901 (Pin 1)
Is the
voltage of 5 V
input?
Yes
Part shape and Pin arrangement
of IC901 and IC902
5
6
No
Tighten screws securely.
MUTE
No
Replace IC801.
No
Turn the power off and
insert the connectors
securely.
(to chassis)
No
Check the CN901 and
Regulator assy.
6
7
IC901 (Pin 3)
Is the
voltage of 3.3 V
output?
Yes
IC902 (Pin 2)
Is the
voltage of 1.25 V
output?
Yes
To Step 4
Step 4: 3 V to 5 V conversion
IC952 (Pin 3)
Do
convert 3 V into
5 V for pin 17
input?
Yes
IC952 (Pin 5)
Do
convert 3 V into
5 V for pin 15
input?
Yes
IC952 (Pin 7)
Do
convert 3 V into
5 V for pin 13
input?
Yes
IC952 (Pin 9)
Do
convert 3 V into
5 V for pin 11
input?
Yes
A
VSX-1016V-K
7
8
(to chassis)
No
Replace IC901.
(to chassis)
No
Replace IC902.
No
Replace IC952.
No
Replace IC952.
No
Replace IC952.
No
Replace IC952.
8
A
B
C
D
E
F
205