Pioneer CDJ-2000NXS2 Service Manual page 23

5
No. Cause Diagnostics Point
7 MUTE1 and SRVB Assy
MUTE2 signal
errors
8 LOAD signal SRVB Assy
error
9 Defective SRVB —————
Assy
[8-2] The stepper does not work.
No. Cause Diagnostics Point
1 The main unit is Main unit
positioned inclined.
2 Improper assembling Traverse mecha
3 Improper assembling Traverse mecha
4 Power supply SRVB Assy
error
5 INSW signal SRVB Assy
error
6 MUTE1 signal SRVB Assy
error
7 Improper assembling Cables
8 Signal error SRVB Assy
9 Defective —————
traverse mecha
[8-3] No playback
Neither a CD nor a DVD can be played back.
No. Cause Diagnostics Point
1 Short-circuit pad Traverse mecha
2 LD current SRVB Assy
3 Power supply SRVB Assy
error
4 INSW signal SRVB Assy
error
5 MUTE1 signal SRVB Assy
error
6 Improper Traverse mecha
assembling
7 A–F signal error SRVB Assy
5
6
Item to be Checked
Check the waveforms of the MUTE1 and
MUTE2 signals. (During loading, the
MUTE1 signal is L and the MUTE2 signal
is H.)
Check the LOAD signal.
If the symptom persists after the above
corrections.
Item to be Checked
Check if the main unit is positioned inclined. Place it on a level surface.
Check if there is a missing or defective part at the
section where the main axis and stepper contact.
Check the inside switch.
Check the power voltages (12 V, 5 V,
3.3 V, 1.5 V, VREF1, VREF2 and VHALF).
Check the INSW signal. (The INSW
becomes L when the INSW is set to ON.)
Check that the MUTE1 signal becomes H
after loading is completed.
Check that the FPC cable that connects the
traverse mecha and the SRVB Assy is
securely connected.
Check that a sine-wave signal is input to
Pins 29 and 30 of DRIVER IC (IC7001).
If the symptom persists after the above
corrections.
Item to be Checked
Check if the LD short-circuit pad is
short-circuited.
Check that the LD current is within the
specified range.
Check the power voltages (12 V, 5 V,
3.3 V, 1.5 V, VREF1, VREF2 and VHALF).
Check the INSW signal. (L at ON.)
Check that the MUTE1 signal becomes H
after loading is completed.
Check if the objective lens is dirty.
Check the A–F signals (CN7001).
CDJ-2000NXS2
6
7
Corrective Action
DRIVER IC (IC7001) and SODC (IC7006) may
be improperly soldered or defective.
Resolder them, if necessary. If the symptom
persists, replace SODC (IC7006).
DRIVER IC (IC7001) and SODC (IC7006) may
be improperly soldered or defective.
Resolder them, if necessary. If the symptom
persists, replace SODC (IC7006).
Replace the SRVB Assy.
Corrective Action
If there is, install the missing part or replace the
defective part.
Assemble the INSW Assy properly.
Check the connection of the parts at the periphery of
the power-supply IC that does not output the voltage.
If the symptom persists after a corrective action, the
power supply block is defective. Replace it.
The FFC cables that connect the traverse mechanism,
SPCN, and SRVB are loosely connected, or the INSW
is defective. Reconnect them securely.
If the symptom persists, replace the INSW.
DRIVER IC (IC7001) and SODC (IC7006) may
be improperly soldered or defective.
Resolder them, if necessary. If the symptom
persists, replace SODC (IC7006).
If it does not, securely connect it. If it is broken,
replace the traverse mecha.
The DRIVER IC (IC7001) may be loosely
connected or defective.
Resolder them, if necessary. If the symptom
persists,replace SODC (IC7006).
Replace the parts in the order of (1) DRIVER IC
(IC7001), (2) SRVB Assy, then (3) traverse mecha.
Corrective Action
If it is, open it.
If there is any error, replace the traverse mecha. 5.2 FAILURE
Check the connection of the parts at the periphery of
the power-supply IC that does not output the voltage.
If the symptom persists after a corrective action, the
power supply block is defective. Replace it.
If the signal waveform is not proper, replace the
INSW Assy.
DRIVER IC (IC7001) and SODC (IC7006) may
be improperly soldered or defective.
Resolder them, if necessary. If the symptom
persists, replace SODC (IC7006).
Clean the lens.
Check that the signals fluctuate with 2.2 V at the center.
If a DC signal is not output, check the VREF1. If a DC
signal is not output from it, replace the FEP (IC7002).
If an AC signal is not output, check the soldering at the
CN7001–IC7002 of the pickup. 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.
7
8
A
Reference
—————
5.4 OPERATIONAL
WAVEFORMS
2
—————
B
Reference
—————
—————
—————
—————
—————
C
—————
—————
5.4 OPERATIONAL
WAVEFORMS
5 7 8
—————
D
Reference
—————
JUDGEMENT OF THE
PICKUP ASSY
—————
E
—————
—————
—————
—————
F
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