Pioneer CDJ-2000NXS Service Manual page 26

1
A Only a DVD cannot be played back
No. Cause Diagnostics Point
1 LD current SRVB Assy
2 7/x6 signal error —————
3 RF signal error SRVB Assy
B
[10] EUP Mode
Shifting to EUP mode is not possible.
No. Cause Diagnostics Point
1 Defective PNLB Assy
PANEL CPU
2 Disconnection, SRVB Assy
C breakage, or
loose connection
of cables
3 Defective SW —————
power
EUP mode cannot be exited.
No. Cause Diagnostics Point
1 Defective key or PNLB Assy
loose connection its periphery
of the signal line
2 Defective PNLB Assy
PANEL CPU
D
3 Disconnection, SRVB Assy
breakage, or
loose connection
of cables
4 Defective SW —————
power
E
F
26
1
2
Item to be Checked
Check that the LD current is within the
specified range.
Check that the 7/x6 signal is L during
DVD playback.
Check the RF signal (CN7001).
Item to be Checked
Check that the signal from Pin 29 of the
PANEL CPU (IC8003) changes from H to
L during mode shift.
Check that the signal from Pin 3 of the
CN7302 changes from L to H during mode
shift.
—————
Item to be Checked
Check the connection of the
nonresponding key.
Check that the signal from Pin 29 of the
PANEL CPU (IC8003) changes from L to
H during mode shift.
Check that the signal from Pin 3 of the
CN7302 changes from H to L during mode
shift.
—————
CDJ-2000NXS
2
3
Corrective Action
If there is any error, replace the traverse mecha. 5.2 Failure Judgment
Check the connections between IC7006 and
CN7001. If soldering is improper, resolder it.
Compare the waveform with the operational waveform
to check if its quality is low. Check if the disc is dirty or
scratched. Check the polarity of the 7/x6 signal. When it
is normal, Check the connections between pickup and
CN7001 and IC7002. If soldering is improper, resolder it.
If soldering is OK, replace the parts in the order of
(1) FEP (IC7002), (2) DRIVER IC (IC7001), (3) SODC
(IC7006), (4) SRVB Assy, then (5) traverse mecha.
Corrective Action
The PANEL CPU (IC8003) may be defective.
Check the soldering of the PANEL CPU and its
periphery. If the soldering is OK, then replace it.
The signal line cable may be defective.
If it is loosely connected, securely connect it.
If it is broken, replace it.
The SW power is defective. Replace it.
Corrective Action
Check the connection of the signal line for the
nonresponding key. If the connection is proper,
replace the connected SW.
The PANEL CPU (IC8003) may be defective.
Check the soldering of the PANEL CPU and its
periphery. If the soldering is OK, then replace it.
The signal line cable may be defective.
If it is loosely connected, securely connect it.
If it is broken, replace it.
The SW power is defective. Replace it.
Reference: Signal logic during EUP mode
Normal mode EUP mode
EUP_CONT
PANEL CPU (IC8003) Pin 29
CPU_EUP_CONT
3
4
Reference
of the Pickup Assy
—————
5.4 OPERATIONAL
WAVEFORMS
1
Reference
—————
—————
—————
Reference
—————
—————
—————
—————
L H or open
H L
X L
X : Not Concerned
4