Pioneer VSX-LX53 Service Manual page 37

5
QQ
3 7 63 1515 0
Step 1-8: USB/iPod
X1501 (Pins 1,3)
Is there a
48 MHz output?
Yes
Are there
signals?
Yes
L1501
Is there
a signal?
Yes
R1531,R1532
Are there
signals?
TE
L 13942296513
Yes
IC101 THROUGH HOLL
Are there
signals?
Yes
OPTICAL OUT
R307
Is there
a signal?
Yes
IC1805 (Pin 12)
www
Is there
a signal?
.
Yes
5
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No Check the X1501,IC1501 and its
peripheral circuits.
(H: around 2.2 Vp-p)
No
Check the USB cable.
NG
Diagnose the FRONT HDMI USB
Assy.
D±
No Check the patterns between
L1501 and CN1503.
D±
No Check the patterns between
R1531,R1532 and L1501.
D±
No Check the patterns between
IC101 and R1531,R1532.
K
Other OPTICAL OUT
V
EMSPDIF
No Check the patterns between
R307 and IC101.
EMSPDIF
No Check the patterns between
x ao
y
IC1805 (Pin 12) and R307.
i
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6
8
R129,131,133,135
Are there
signals?
IC1810 (Pins 3,6,10,13)
Are there
signals?
IC1810 (Pins 4,7,9,12)
Are there
signals?
IC1811 (Pins 2,5,11,14)
Q Q
Are there
3 6 7 1 3
signals?
IC1811 (Pins 4,7,9,12)
Are there
signals?
IC1805 (Pin 11)
Is there
a signal?
CN9302 (Pin 30)
Is there
a signal?
u163
.
VSX-LX53
6
7
2 9 9 4 2 8
V
EMMCK,EMBCK,EMLRCK,EMADAT
No
Check the patterns between
R129,R131,R133,R135 and IC101.
Yes
EMMCK,EMBCK,EMLRCK,EMADAT
No Check the patterns between
IC1810 (Pins 3,6,10,13) and
R129,R131,R133,R135.
Yes
No Check the IC1810 and its
peripheral circuits.
(USBSW signal: High)
Yes
No Check the patterns between
1 5 0 5 8 2 9 9 4
IC1811 (Pins 2,5,11,14) and
IC1810 (Pins 4,7,9,12).
Yes
No Check the IC1811 and its
peripheral circuits.
(HDI2S signal: Low)
Yes
I
MSPDIF
No Check the IC1805 and its
peripheral circuits.
(XEMSPDIF signal: Low)
Yes
MSPDIF
m
No Check the patterns between
co
CN9302 (Pin 30) and IC1805 (Pin 11).
Yes
H
7
8
9 9
A
B
C
2 8 9 9
D
E
F
37
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