Pioneer VSX-918V-K Service Manual page 29

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