VSX-1016V-K
198
1
2
3
4
1
2
3
4
C
D
F
A
B
E
7.1.3 DSP TROUBLESHOOTING
• When a sound is not out in the multi-CH signal playback mode or surround mode with the digital signal input.
(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 4: 3 V to 5 V conversion
Step 2: BtoB connector
Step 1: MUTE pin
CN901, CN701, CN952
Are the
connectors securely
inserted?
Turn the power off and
insert the connectors
securely.
No
IC952 (Pin 3)
Do
convert 3 V into
5 V for pin 17
input?
Replace IC801.
Replace IC901.
Replace IC902.
A
Yes
To Step 3
To Step 2
To Step 4
Step 0: Preliminary confirmation
Confirm the following items before checking
Do screws
of COAX Jack
securely tighten
?
Tighten screws securely.
No
Yes
To Step 1
IC801 (Pin 54)
Is the
voltage of output
signal 0 V
?
Yes
Replace IC952.
No
No
MUTE
Troubleshooting for all destination
Step 3: Regulator IC
Check the CN901 and
Regulator assy.
IC901 (Pin 1)
Is the
voltage of 5 V
input?
No
Yes
(to chassis)
IC902 (Pin 2)
Is the
voltage of 1.25 V
output?
No
(to chassis)
IC901 (Pin 3)
Is the
voltage of 3.3 V
output?
No
Yes
Yes
Yes
IC952 (Pin 5)
Do
convert 3 V into
5 V for pin 15
input?
Replace IC952.
No
Yes
IC952 (Pin 7)
Do
convert 3 V into
5 V for pin 13
input?
Replace IC952.
No
Yes
IC952 (Pin 9)
Do
convert 3 V into
5 V for pin 11
input?
Replace IC952.
No
Yes
(to chassis)
Part shape and Pin arrangement
of IC901 and IC902
