Pioneer VSX-LX53 Service Manual page 34

1
QQ
3 7 63 1515 0
Step 1-5: Multi CH SOURCE INPUT
A
(compression system such as DTS and Dolby)
Diagnose D2CDTI, D2SDTI, and D2BDTI additionally in the step 1-4*A.
For the following steps, diagnose the center, surround and surround
back ch additionally in a same way.
Step 1-6: XM IN
OPTICAL OUT
JA1801 (Pins 2,3)
B
Are there No
signals?
Yes
IC1803 (Pins 18,19,23)
No
Are there
signals?
C Yes
IC1803
(Pins 37,39,41,43)
TE
L 13942296513
No
Are there
signals?
Yes Yes
IC1808 (Pins 2,14)
IC1806 (Pins 9,12)
D
Are there No
signals?
Yes Yes
IC1808 (Pins 4,12)
IC1806 (Pins 8,11)
No
Are there
E
signals?
Yes Yes
CN9302
(Pins 21,24,26,28)
www
Are there No
signals?
Yes Yes
F
Diagnose the DAC Assy.
34
1
http://www.xiaoyu163.com
2
Check soldering of connector and
the source equipment.
Check the patterns and circuits
between IC1803 (Pins 18,19,23)
and JA1803.
Check the IC1803 and its
peripheral circuits.
Check the patterns between
IC1808 (Pins 2,14) and
IC1803 (Pins 37,43).
Check the patterns between
IC1806 (Pins 9,12) and
IC1803 (Pins 39,41).
DIRMCKI,DIRDATI,DIRBCK,
DIRLRCK
Check the IC1808,IC1806 and its
peripheral circuits.
(XXM signal: Low)
DIRMCKI,DIRDATI,DIRBCK,
DIRLRCK
Check the patterns between
x ao
CN9302 (Pins 21,24,26,28) and
y
IC1808 (Pins 4,12),
IC1806 (Pins 8,11).
. i
VSX-33 only
2
http://www.xiaoyu163.com
3
8
Other OPTICAL OUT
JA1801 (Pins 2,3)
Are there
signals?
Yes
IC1803 (Pins 18,19,23)
Are there
signals?
Yes
IC1803
(Pins 37,39,41,43)
Are there
signals?
Yes
IC1808 (Pins 5,11)
Q Q
IC1806 (Pins 9,12)
3 6 7 1 3
Are there
signals?
Yes
IC1808 (Pins 7,9)
IC1806 (Pins 8,11)
Are there
signals?
Yes Yes
IC1810 (Pins 2,5,11,14)
Are there
signals?
Yes
IC1810 (Pins 4,7,9,12)
Are there
u163
signals?
.
Yes Yes
C
VSX-LX53
3
4
2 9 9 4 2 8
No
Check the soldering of connector
and the source equipment.
No
Check the patterns and circuits
between IC1803 (Pins 18,19,23)
and JA1803.
No Check the IC1803 and its
peripheral circuits.
1 5 0 5 8 2 9 9 4
Check the patterns between
No
IC1808 (Pins 5,11) and
IC1803 (Pins 37,43).
Check the patterns between
IC1808 (Pins 9,12) and
IC1803 (Pins 39,41).
No
Check the IC1808,IC1806 and its
peripheral circuits.
(XXM signal: Low)
No Check the patterns between
IC1810 (Pins 2,5,11,14) and IC1808
(Pins 7,9),IC1806 (Pins 8,11).
m
No Check the IC1810 and its
co
peripheral circuits.
(USBSW signal: Low)
VSX-33 only
4
9 9
2 8 9 9