Pioneer VSX-918V-S Service Manual page 29

5
QQ
A
3 7 63 1515 0
IC101 (Pin 26)
Is there
a bit clock
output?
Yes
Switch
IC161 (Pin 4)
Is there
a data
output?
Yes
IC161 (Pin 7)
Is there
a bit clock
output?
Yes
IC161 (Pin 12)
Is there
a LR clock
output?
TE
L 13942296513
Yes
IC161 (Pin 9)
Is there
a master clock
output?
Yes
To Step 7-2 (AWX9162)
To Step 8 (AWX9163)
www
.
5
http://www.xiaoyu163.com
DIRB (Bit clock)
No
Replace IC101.
(0 V ⇔ 3.3 V)
S1DT (data)
No
(0 V ⇔ 3.3 V)
S1BC (Bit clock)
No
(0 V ⇔ 3.3 V)
S1LR (LR clock)
No
(0 V ⇔ 3.3 V)
S1MC (Master clock)
No
(0 V ⇔ 3.3 V)
Is the
No
voltage of
IC161-pin 1
0 V?
Check the path
Yes
between IC161-pin 1
and microcomputer.
Replace IC161.
x ao
y
i
http://www.xiaoyu163.com
6
Step 7-2 (AWX9162 only)
8
Check that the data and clock signals are output.
IC171 (Pin 4)
Is there
a data
output?
IC171 (Pin 7)
Is there
a bit clock
output?
IC171 (Pin 12)
Is there
a LR clock
output?
IC171 (Pin 9)
Is there
a master clock
output?
Q Q
3 6 7 1 3
To Step 8
u163
.
VSX-918V-K
6
7
2 9 9 4 2 8
S2DT (data)
No
(0 V ⇔ 3.3 V)
Yes
S2BC (Bit clock)
No
(0 V ⇔ 3.3 V)
Yes
S2LR (LR clock)
No
(0 V ⇔ 3.3 V)
Yes
S2MC (Master clock)
No
(0 V ⇔ 3.3 V)
Yes
1 5 0 5 8 2 9 9 4
At COAX, OPT or USB input
Is the
voltage of
IC171-pin 1
0 V?
Check the path
Yes
between IC171-pin 1
and microcomputer.
Replace IC171.
At HDMI input
Is the
voltage of
IC171-pin 1
5 V?
Check the path
Yes
between IC171-pin 1
and microcomputer.
Replace IC171.
m
co
7
8
9 9
A
B
C
2 8 9 9
No
D
No
E
F
29
8