Pioneer VSX-2016AV-S Service Manual page 213

5
M
For the following diagnosis, a digital
oscilloscope must be used.
DSDI3
CN951 (Pin 14)
Is the clock
No
Check the path to the
signal output while the
microcomputer.
voltage at DICS3
is 0 V?
Yes
IC101 (Pin 127)
Is the clock
No
Check the parts and patterns
signal output while the
in the path.
voltage at DICS3
is 0 V?
Yes
IC101 (Pin 126) DSDO3
Is the clock
No
The 1st DSP or the communication
signal output while the
path is in failure.
voltage at DICS3
is 0 V?
Yes
CN951 (Pin 13)
Is the clock
No
Check the parts and patterns
signal output while the
in the path.
voltage at DICS3
is 0 V?
Yes
It is very difficult to diagnose
which part is in failure.
Step 9: 2nd DSP
D2RST
CN951 (Pin 11)
No
Is the voltage
Check the path to the microcomputer.
3.3 V?
Yes
IC201 (Pin 47)
No
Check the parts and patterns
Is the voltage
in the path.
3.3 V?
Yes
Is the
voltage of D2RST
No
The 2nd DSP or the communication
maintained in 3.3V?
path is in failure.
(Does it fall to become
0V periodically?)
5
6
CN951 (Pin 10)
Does the logic
of D2CS periodically
become 3.3 V or
0 V?
IC201 (Pin 37)
Does the logic
of D2CS periodically
become 3.3 V or
0 V?
CN951 (Pin 12)
Is the clock
signal output while the
voltage at D2CS
is 0 V?
IC201 (Pin 36)
Is the clock
signal output while the
voltage at D2CS
is 0 V?
CN951 (Pin 14)
Is the clock
signal output while the
voltage at D2CS
is 0 V?
IC201 (Pin 34)
Is the clock
signal output while the
voltage at D2CS
is 0 V?
IC201 (Pin 35)
Is the clock
signal output while the
voltage at D2CS
is 0 V?
N
VSX-2016AV-S
6
7
For the following diagnosis, a digital
oscilloscope must be used.
D2CS
No
Check the path to the
microcomputer.
Yes
No
Check the parts and patterns
in the path.
Yes
DSCLK3
No
Check the path to the
microcomputer.
Yes
No
Check the parts and patterns
in the path.
Yes
DSDI3
No
Check the path to the
microcomputer.
Yes
No
Check the parts and patterns
in the path.
Yes
DSDO3
No
The 2nd DSP or the communication
path is in failure.
Yes
7
8
A
B
C
D
E
F
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