Pioneer SC-37 Service Manual page 37

5
QQ
Audio Section Troubleshooting
3 7 63 1515 0
USB/iPod
INTERNET RADIO
• Perform each
Diagnosis
[Distinction between analog and digital problem]
1 Set the speaker setting to "Large" for all the channels.
2 Set the function to "Multi Ch In".
3 Set the listening mode to "Pure Direct".
4 Fix the signal switching to "Analog".
[Distinction between AD line and other digital problem]
TE
L 13942296513
Failure in
A/D converter
[Distinction between DSP and other problem]
1 Input the PCM (such as CD) signals.
2 Change the listening mode to "Pure Direct (PCM Direct)".
3 Set the signal switching to "Auto" or "PCM".
OK
Failure in DSP
Perform DSP Diagnosis
If any sound format or input
can not produce sound, execute
STEP1 or troubleshooting for
any specific format and input
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No Sound Produced
• Does the symptom occur only with a specific function?
(HMG, HDMI System, Others)
• Does the same symptom occur with more than one function?
HDMI System
Function
(BD, HDMI IN1-4)
• Perform HDMI
Diagnosis
OK
• Is the sound produced with the digital input?
# With the signal switching set to "Auto".
OK
[Distinction between DIR and other problem]
• Is the input assumed to be digital with
the signal switching set to "Auto"?
(Is DIR locked in digital?)
OK
NG
Failure in D/A
converter
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8
[Distinction the Symptom]
• Failure around the
[Distinction between preout and power problem]
Q Q
NG
3 6 7 1 3
NG
Failure in DIR
.
SC-37
7
9 4 2 8
Other
Specific Function
circuit from input
terminal to the switch
NG
• Is the pre-out output?
1 5 0 5 OK 8 2 9 9 4
Perform ICE POWER Failure in analog
Diagnosis small signal block
m
co
7
8
9 9
A
More than
one function
B
C
NG
2 8 9 9
D
E
F
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