Pioneer VSX-LX53 Service Manual page 31

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Step 1-3: Reset for DSP
IC9304 (Pin 12)
Is the
voltage of around
3.3 V?
Yes
CN9301 (Pin 26)
Is the
voltage of around
3.3 V?
Yes
IC9304 (Pin 13)
Is the
voltage of around
3.3 V?
Yes
IC9003 (Pin 111)
Is the
voltage of around
TE
L 13942296513
3.3 V?
Yes
IC604 (Pin 63)
Is the
voltage of around
3.3 V?
Yes
IC9202 (Pin 14)
Is the
voltage of around
3.3 V?
Yes
Replace DIGITAL MAIN ASSY
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XDIRRST
No
Check the IC9304 and its
peripheral circuits.
XDIRRST
No
Check the patterns between
IC9304 (Pin 12) and CN9301 (Pin 26).
XDSP1RST
No
Check the IC9304 and its
peripheral circuits.
XDSP1RST
No
Check the patterns between
IC9304 (Pin 13) and IC9003 (Pin 111)
(Include R9049).
XDSP2RST
No
Replace IC604.
XDSP2RST
No
Check the patterns between
IC604 (Pin 63) and IC9202 (Pin 14)
(Include R9230).
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2 9
8
Step 1-4: Coaxial/Optical/AD IN (STEREO)
X9001 (Pin 3)
Is there
a signal?
Yes
IC9011 (Pin 13)
Is there
a signal?
Yes
IC9011 (Pin 11)
Is there
a signal?
Yes
IC1808 (Pin 3)
Q Q
3 6 7 1 3 1 5
Is there
a signal?
Yes
IC1808 (Pin 4)
Is there
a signal?
Yes
CN9302 (Pin 26)
Is there
a signal?
Yes Yes
A
co
.
VSX-LX53
7
8
9 4 2 8
No
Check the X9001 and its peripheral
circuits.
No
Check the patterns between
IC9011 (Pin 13) and IC9001 (Pin 3).
DIRMCK
No Check the IC9011 and its
peripheral circuits.
VSX-LX53
VSX-33 only
DIRMCK
0 5 8 2 9 9 4 2 8
No
Check the patterns between
IC1808 (Pin 3) and
IC9011 (Pin 11).
DIRMCKI
No
Check the IC1808 and its
peripheral circuits.
DIRMCKI
VSX-33
Check the patterns between
CN9302 (Pin 26) and
IC1808 (Pin 4)
No
VSX-LX53/VSX-2020-K
Check the patterns between
CN9302 (Pin 26) and
IC9011 (Pin 11)
m
8
9 9
A
B
C
9 9
D
E
F
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