Pioneer CDJ-2000NXS2 Service Manual page 21

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No. Cause Diagnostics Point
3 The USB MAIN Assy
POWER SW IC
or its control
signal is defective.
4 Defective MAIN Assy
DC/DC
converter for
V+5_USB or
peripheral circuit
5 Defective MAIN Assy
USB_CLK signal
6 Defective MAIN Assy
MAIN CPU
[4-2] No communication via the USB connector (Type B)
Check the following, with a USB device connected to the USB B connector.
No. Cause Diagnostics Point
1 Loose connections MAIN Assy
in the communi-
cation line.
2 Defective MAIN Assy
CPU_VBUS0
signal
3 Loose connections MAIN Assy
in the USB signal.
4 Defective MAIN Assy
USB_CLK signal
5 Defective MAIN Assy
MAIN CPU
[4-3] The SD card cannot be recognized.
Check the following, with an SD card inserted in the SD card slot.
No. Cause Diagnostics Point
1 Loose connections MAIN Assy,
in the communi-
SDCB Assy
cation line.
2 Defective MAIN Assy
MAIN CPU
[5] LAN
[5-1] No LAN communication
Check the following, with a peripheral device connected to the LINK terminal.
No. Cause Diagnostics Point
1 Loose connections MAIN Assy
in the communi-
cation line.
2 Defective MAIN Assy
LAN-HUB & PHY
or
MAIN CPU
5
6
Item to be Checked
Check the CPU_USB_HSTPWREN and
HSSW_PWRFL signals from the
USB POWER SW IC (IC607).
Check the DC/DC converter for
V+5_USB (IC606) or
check the peripheral circuit.
Check the USB_CLK (= 48.000 MHz)
signal.
If the symptom persists after the above
corrections.
Item to be Checked
Check the USB communication line.
Check the VBUS_DET_DIRECT signal.
Check the connections of the
communication line (USB_D+, USB_D-).
Check the USB_CLK (= 48.000 MHz)
signal.
If the symptom persists after the above
corrections.
Item to be Checked
Check the connection of the SD serial
communication line.
If the symptom persists after the above
corrections.
Item to be Checked
Check the connection of the periphery
circuit of LAN-HUB & PHY (IC604).
If the symptom persists after the above
corrections.
CDJ-2000NXS2
6
7
Corrective Action
If the CPU_USB_HSTPWREN signal does not
become H, check the connection. If the
connection is OK, then the MAIN CPU (IC10) is
defective. Replace the MAIN CPU (IC10). If the
HSSW_PWRFL signal does not become H, the
USB POWER SW IC (IC607) is in a state of
shutdown caused by abnormally high
temperature. Check the connection. If the
connection is OK, then the port may be
damaged. Replace it.
Analyze DC/DC converter for V+5USB (IC606)
and peripheral circuit. Identify a defectiveness
element and replace it.
The X1 may be loosely connected with its
peripheral devices or a part may be defective.
Correct loose connection. If the symptom
persists, replace the defective part.
The MAIN CPU (IC10) is defective.
Replace the MAIN CPU (IC10).
Corrective Action
The communication line may be loosely
connected. Correct it if it is.
If connection is proper, go to 2.
If the VBUS_DET_DIRECT signal cannot be
found, something is wrong in the line from the
USB-B connector (JA5102) to IC603.
Identify the defective site and correct it. If the
VBUS_DET_DIRECT signal is found, go to 3.
The communication line may be loosely
connected. Correct it if it is.
If connection is proper, go to 4.
The X1 may be loosely connected with its
peripheral devices or a part may be defective.
Correct loose connection. If the symptom
persists, replace the defective part.
The MAIN CPU (IC10) is defective.
Replace the MAIN CPU (IC10).
Corrective Action
The communication line may be loosely
connected. Correct it if it is.
The MAIN CPU (IC10) is defective.
Replace the MAIN CPU (IC10).
Corrective Action
The communication line may be loosely
connected. Correct it if it is.
The LAN-HUB & PHY (IC604) may be defective.
Replace it.
If the symptom persists, the MAIN CPU (IC10)
may be defective.
Replace the MAIN CPU (IC10).
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A
Reference
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B
10.27 WAVEFORMS
2
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Reference
C
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10.27 WAVEFORMS
2
D
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Reference
10.27 WAVEFORMS
5
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E
Reference
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F
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