Dsp Troubleshooting - Pioneer VSX-2016AV-S Service Manual

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7.1.3 DSP TROUBLESHOOTING

A
Simplified diagnosis
Herein is described how to easily diagnose a defective part in the DSP Assy, only with operations of the main unit.
• If the sound is not output when Sound Delay is ON
If the sound is output without a problem when Sound Delay is OFF (0.0 fr) but an abnormality in the sound is detected
when Sound Delay is ON (0.1 to 6.0 fr), it is most likely that SRAM (IC107) or DECODER IC (IC105) in the 1st DSP block
is in failure.
Troubleshooting
• It is assumed that there is no loose connection or damage in the LCRs.
• : KUXJ and KUXJCA types only
B
Step 0: Preliminary confirmation
Confirm the following items before checking
Do screws
of COAX Jack
securely tighten
?
Yes
C
Does a XM
antenna pull off?
Yes
To Step 1
Step 1: Connections
CN901, CN402, CN951, CN801
D
Are the
connectors securely
inserted?
Yes
CN301, CN952
Are the
FFC securely
inserted?
E Yes
To Step 2
F
200
1
2
No
Tighten screws securely.
No
Pull off a XM antenna.
No
Insert the connectors
securely.
No
Insert the FFCs
securely.
VSX-2016AV-S
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3
Step 2: Power supply
Digital 5 V input
CN901 (Pins 13,14)
Is the
No
voltage of digital any loose connection
power 5.2 V?
Yes
Check the power output
of the main unit.
IC301 (Pin 13)
No
Check the parts and patterns
Is the voltage
in the path.
5.2 V?
Yes
CN301 (Pin 9)
No
Check the parts and patterns
Is the voltage
in the path.
5.2 V?
Yes
XM Load Switch
IC502 (Pin 5)
No
Check the parts and patterns
Is the voltage
in the path.
5.2 V?
Yes
XM Jack
CN501 (Pin 1)
No
Is the voltage
5.2 V?
Yes
Check the power output
of the main unit.
A
3
4
Is there
No
at pins 13,14 of
CN901?
Replace CN901.
Yes
Is the
No
voltage of
IC502-pin 1
5.2 V?
Replace IC502.
Yes
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