Troubleshooting The Network Block - Pioneer XC-Z9 Service Manual

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5.3.2 TROUBLESHOOTING THE NETWORK BLOCK

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Step 1:Connectors
CN10, CN801, CN901(FFC)
Are the
connectors
securely
inserted?
Yes
To STEP 2
Step 2:Power supply
1 CN10 (Pins1-2)
Is the
voltage 5V?
Yes
2 IC11 (Pin 2)
Is the
voltage 5V?
Yes
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L 13942296513
3 IC31 (Pin 2)
Is the
voltage 5V?
Yes
4 IC801 (Pin 5)
Is the
voltage 5V?
Yes
5 IC11 (Pin 4), IC21 (Pin 2)
Is the
voltage 3.3V?
Yes
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No
Insert the connectors securely.
5V input
Is there
No No
any loose
connection of
CN10?
Yes
Check the MAIN
Assy.
To STEP 1
3.3V Regulator IC input
No
Check the parts and patterns in
the path.
No
Check the patterns in the path.
USB Power SW
No
Check the parts and patterns in
the path.
3.3V Reg. output/1.8V Reg. input
Is IC11
No No
abnormally
hot?
Yes
Replace IC11.
The output and GND may be
short-circuited. Check the path
between them.
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6 IC881 (Pins 37,47)
Is the
voltage 3.3V?
Yes
7 IC891 (Pins 1,3,9,14,27,43,49)
Is the
voltage 3.3V?
Yes
8 IC911 (Pin 14)
Is the
voltage 3.3V?
Yes
IC701 (Pins 3,16,32,43,55,61,78,89,103,
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113,125,136,151,158,176,192,201)
Is the
voltage 3.3V?
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3 6 7 1 3 1 5
Yes
IC861 (Pins 14, 36, 48)
Is the
voltage 3.3V?
Yes
10 IC21 (Pin 4)
Is the
voltage 1.8V?
Yes
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XC-Z9
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9 4 2 8
FLASH ROM
No
Check the parts and patterns in
the path.
SDRAM
No
Check the parts and patterns in
the path.
5-3 Converter
No
Check the parts and patterns in
the path.
NETWORK Media
processor IC
No
Check the parts and patterns in
the path.
0 5 8 2 9 9 4 2 8
No
Check the parts and patterns in
the path.
1.8V Regulator output
Is IC21
No No
abnormally
hot?
Yes
Replace IC21.
The output and GND may be
short-circuited. Check the path
between them.
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B
C
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D
E
F
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