Pioneer CDJ-900 Service Manual page 37

5
E-7020: USB-B DEVICE ERROR
• The USB-B controller does not work properly.
No. Cause Diagnostics Point
Defective power
1 MAIN Assy
supply
2 Signal errors MAIN Assy
3 Defective parts MAIN Assy
E-7021: PHY DEVICE ERROR
• ETHER PHY CHIP (IC1304) does not work properly.
No. Cause Diagnostics Point
Defective power
1 MAIN Assy
supply
Clock signal
2 MAIN Assy
error
3 Signal errors MAIN Assy
4 Defective parts MAIN Assy
E-7022: PANEL CPU ERROR
• PANEL CPU (IC8005) does not work properly.
No. Cause Diagnostics Point
Defective power
1 DFLB Assy
supply
Clock signal
2 DFLB Assy
error
Defective power
3 DFLB Assy
supply
4 Signal errors DFLB Assy
5 Defective parts DFLB Assy
5
6
Item to be Checked
Check the power voltage (V+3R3_USB_ IO)
of USB_B CONTROLLER (IC1101).
Check that the USB_RST signal that is input
to the USB_B CONTROLLER (IC1101) is "H."
Check the mounting status of the
USB_B CONTROLLER IC (IC1101).
Item to be Checked
Check the power voltage (V+3R3_ETH)
of ETHER PHY CHIP (IC1304).
Check that the clock signal (25 MHz)
is input to ETHER PHY CHIP (IC1304).
Check that the ETHER_RST signal that is
input to the ETHER PHY CHIP (IC1304) is
"H."
Check the mounting status of the
ETHER PHY CHIP (IC1304).
Item to be Checked
Check the power voltage (V+3R3E)
of PANEL CPU (IC8005).
Check that the clock signal (15.975 MHz)
is input to PANEL CPU (IC8005).
Check the power voltage (V+12EUP)
of DFLB Assy.
Check the communication waveforms.
PNL_SCLK2
PNL_BUSY
PNL_TXD2
PNL_RXD2
If the symptom persists after the above
corrections,
CDJ-900
6
7
Corrective Action
If power is not supplied, check the connections of
the power line.
If V+3R3E is supplied, go to [2].
If V+3R3E is not supplied, go to [3].
If it is not "H," check the mounting status of the pull-up
resistor (R1110). If it is properly mounted, then the
mounting status of the IC123 may be improper.
Resolder it. If the symptom persists after this correction,
replace it.
If it is properly mounted, then replace the USB_B
CONTROLLER (IC1101).
Corrective Action
If power is not supplied, check the connections of
the power line.
If V+3R3E is supplied, go to [2].
If V+3R3E is not supplied, go to [3].
If it is not, the crystal oscillator (X1302) and their peripheral
chips may be defective or their mounting statuses may be
improper. Resolder the parts. If the symptom persists after
this correction, replace the parts.
If it is not "H," check the mounting status of the pull-up
resistor (R1390). If it is properly mounted, then the mount-
ing status of the IC123 may be improper. Resolder it. If the
symptom persists after this correction, replace it.
If it is properly mounted, then replace the ETHER
PHY (IC1304).
Corrective Action
If power is not supplied, check the connections of
the power line.
If V+3R3E is supplied, go to [2].
If V+3R3E is not supplied, go to [3].
If it is not, the crystal oscillator (X8001) and their peripheral
chips may be defective or their mounting statuses may be
improper. Resolder the parts. If the symptom persists after
this correction, replace the parts.
If V+12EUP is output, check the mounting statuses
of the IC8010 and its peripheral parts. If they are
properly mounted, then the parts may be defective.
Replace them.
If V+12EUP is not output, check the connections of
the power line.
If the waveforms are not proper, check the connections
of the communication line.
If the PNL_SCLK2 waveform is not proper, check the
mounting statuses of the IC8001 and IC8002 and their
peripheral parts.
If the PNL_TXD or PNL_RXD waveform is not proper,
check the mounting statuses of the IC8003 and its
peripheral parts.
Replace the PANEL CPU (IC8005).
7
8
A
Reference
-
10.5 MAIN
ASSY(3/3),
USBA ASSY
10.3 MAIN
ASSY(1/3)
B
10.15 WAVE-
r
FORMS
10.5 MAIN
ASSY(3/3),
USBA ASSY
Reference
-
C
10.5 MAIN
ASSY(3/3),
USBA ASSY
10.15 WAVE-
v A
FORMS ,
10.5 MAIN
ASSY(3/3),
USBA ASSY
10.3 MAIN
ASSY(1/3)
10.15 WAVE-
r
FORMS
10.5 MAIN
ASSY(3/3),
USBA ASSY
D
Reference
4.3 POWER SUPPLY
BLOCK DIAGRAM
10.7 DFLB,
ENCB ASSY
10.15 WAVE-
V
FORMS
E
4.3 POWER SUPPLY
BLOCK DIAGRAM
4.2 SIGNAL
BLOCK DIAGRAM
10.7 DFLB,
ENCB ASSY
F
-
37
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