29
VSX-918V-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
To Step 7-2 (AWX9162)
To Step 8 (AWX9163)
Replace IC101.
Yes
IC101 (Pin 26)
DIRB (Bit clock)
No
Is there
a bit clock
output?
(0 V
⇔
3.3 V)
Yes
IC161 (Pin 4)
S1DT (data)
Is there
a data
output?
(0 V
⇔
3.3 V)
Yes
IC161 (Pin 7)
S1BC (Bit clock)
Is there
a bit clock
output?
(0 V
⇔
3.3 V)
Yes
IC161 (Pin 12)
S1LR (LR clock)
Is there
a LR clock
output?
(0 V
⇔
3.3 V)
Yes
IC161 (Pin 9)
S1MC (Master clock)
Is there
a master clock
output?
(0 V
⇔
3.3 V)
Replace IC161.
Check the path
between IC161-pin 1
and microcomputer.
No
No
No
No
No
Is the
voltage of
IC161-pin 1
0 V?
Yes
To Step 8
Yes
IC171 (Pin 4)
S2DT (data)
Is there
a data
output?
(0 V
⇔
3.3 V)
Yes
IC171 (Pin 7)
S2BC (Bit clock)
Is there
a bit clock
output?
(0 V
⇔
3.3 V)
Yes
IC171 (Pin 12)
S2LR (LR clock)
Is there
a LR clock
output?
(0 V
⇔
3.3 V)
Yes
IC171 (Pin 9)
S2MC (Master clock)
Is there
a master clock
output?
(0 V
⇔
3.3 V)
Replace IC171.
At COAX, OPT or USB input
Check the path
between IC171-pin 1
and microcomputer.
No
No
No
No
No
Is the
voltage of
IC171-pin 1
0 V?
Yes
Replace IC171.
At HDMI input
Check the path
between IC171-pin 1
and microcomputer.
No
Is the
voltage of
IC171-pin 1
5 V?
Yes
Step 7-2 (AWX9162 only)
Switch
Check that the data and clock signals are output.
A
