VSX-917V-K
107
5
6
7
8
5
6
7
8
C
D
F
A
B
E
Step 4: 3 V to 5 V conversion
Step 2: BtoB connector
Step 1: MUTE pin
CN901, CN701, CN951
Are the
connectors securely
inserted?
Turn the power off and
insert the connectors
securely.
No
IC952 (Pin 18)
Do
convert 3 V into
5 V for pin 2
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
?
No
Replace IC952.
No
Yes
MUTE
Step 3: Regulator IC
Check the CN901 and
Regulator assy.
IC901 (Pin 4)
Is the
voltage of around
5 V to 5.3 V
input?
No
Yes
(to chassis)
IC902 (Pin 5)
Is the
voltage of 1.25 V
output?
No
(to chassis)
IC901 (Pin 5)
Is the
voltage of 3.3 V
output?
No
Yes
Yes
Yes
IC952 (Pin 17)
Do
convert 3 V into
5 V for pin 3
input?
Replace IC952.
No
Yes
IC952 (Pin 16)
Do
convert 3 V into
5 V for pin 4
input?
Replace IC952.
No
Yes
IC952 (Pin 15)
Do
convert 3 V into
5 V for pin 5
input?
Replace IC952.
No
Yes
(to chassis)
Part shape and Pin arrangement
of IC901 and IC902
• 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.
Troubleshooting in the MCACC mode (AWX8809 and AWX8810 only)
